<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivities" xlink:href="zinc-20140630.xsd#AccountingForDerivativeInstrumentsAndHedgingActivities" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#AccountingForDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesScheduleOfFairValueOfSwapContractsAndPutOptionsDetails" xlink:href="zinc-20140630.xsd#AccountingForDerivativeInstrumentsAndHedgingActivitiesScheduleOfFairValueOfSwapContractsAndPutOptionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesScheduleOfGainsAndLossesResultingFromCompanysHedgingActivitiesDetails" xlink:href="zinc-20140630.xsd#AccountingForDerivativeInstrumentsAndHedgingActivitiesScheduleOfGainsAndLossesResultingFromCompanysHedgingActivitiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesTables" xlink:href="zinc-20140630.xsd#AccountingForDerivativeInstrumentsAndHedgingActivitiesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccruedExpenses" xlink:href="zinc-20140630.xsd#AccruedExpenses" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccruedExpensesScheduleOfAccruedExpensesDetails" xlink:href="zinc-20140630.xsd#AccruedExpensesScheduleOfAccruedExpensesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccruedExpensesTables" xlink:href="zinc-20140630.xsd#AccruedExpensesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccumulatedOtherComprehensiveIncome" xlink:href="zinc-20140630.xsd#AccumulatedOtherComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccumulatedOtherComprehensiveIncomeComponentsOfAccumulatedOtherComprehensiveLossDetails" xlink:href="zinc-20140630.xsd#AccumulatedOtherComprehensiveIncomeComponentsOfAccumulatedOtherComprehensiveLossDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AccumulatedOtherComprehensiveIncomeTables" xlink:href="zinc-20140630.xsd#AccumulatedOtherComprehensiveIncomeTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AcquisitionOfBusiness" xlink:href="zinc-20140630.xsd#AcquisitionOfBusiness" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/AcquisitionOfBusinessDetails" xlink:href="zinc-20140630.xsd#AcquisitionOfBusinessDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/BasisOfPresentation" xlink:href="zinc-20140630.xsd#BasisOfPresentation" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/BasisOfPresentationRecentAccountingPronouncementsPolicies" xlink:href="zinc-20140630.xsd#BasisOfPresentationRecentAccountingPronouncementsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/CashAndCashEquivalents" xlink:href="zinc-20140630.xsd#CashAndCashEquivalents" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/CashAndCashEquivalentsAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#CashAndCashEquivalentsAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/CashAndCashEquivalentsScheduleOfCashAndCashEquivalentsDetails" xlink:href="zinc-20140630.xsd#CashAndCashEquivalentsScheduleOfCashAndCashEquivalentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/CashAndCashEquivalentsTables" xlink:href="zinc-20140630.xsd#CashAndCashEquivalentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ConsolidatedBalanceSheets" xlink:href="zinc-20140630.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="zinc-20140630.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ConsolidatedStatementOfStockholdersEquity" xlink:href="zinc-20140630.xsd#ConsolidatedStatementOfStockholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ConsolidatedStatementsOfCashFlows" xlink:href="zinc-20140630.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ConsolidatedStatementsOfComprehensiveLossIncome" xlink:href="zinc-20140630.xsd#ConsolidatedStatementsOfComprehensiveLossIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ConsolidatedStatementsOfOperations" xlink:href="zinc-20140630.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/Contingencies" xlink:href="zinc-20140630.xsd#Contingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/DeferredFinanceCostsAndOtherDeferredFinanceCostsAndOtherDetails" xlink:href="zinc-20140630.xsd#DeferredFinanceCostsAndOtherDeferredFinanceCostsAndOtherDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/DeferredFinanceCostsAndOtherTables" xlink:href="zinc-20140630.xsd#DeferredFinanceCostsAndOtherTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/DepositsAndOther" xlink:href="zinc-20140630.xsd#DepositsAndOther" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/DocumentAndEntityInformation" xlink:href="zinc-20140630.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EarningsPerShare" xlink:href="zinc-20140630.xsd#EarningsPerShare" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EarningsPerShareAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#EarningsPerShareAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EarningsPerShareScheduleOfAntiDilutiveSharesExcludedFromEarningsPerShareCalculationDetails" xlink:href="zinc-20140630.xsd#EarningsPerShareScheduleOfAntiDilutiveSharesExcludedFromEarningsPerShareCalculationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EarningsPerShareScheduleOfInformationUsedToComputeBasicAndDilutedEarningsLossPerShareDetails" xlink:href="zinc-20140630.xsd#EarningsPerShareScheduleOfInformationUsedToComputeBasicAndDilutedEarningsLossPerShareDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EarningsPerShareTables" xlink:href="zinc-20140630.xsd#EarningsPerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EmployeeBenefitPlans" xlink:href="zinc-20140630.xsd#EmployeeBenefitPlans" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EmployeeBenefitPlansAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#EmployeeBenefitPlansAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EmployeeBenefitPlansScheduleOfNetPeriodicBenefitCostsDetails" xlink:href="zinc-20140630.xsd#EmployeeBenefitPlansScheduleOfNetPeriodicBenefitCostsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/EmployeeBenefitPlansTables" xlink:href="zinc-20140630.xsd#EmployeeBenefitPlansTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformation" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformationAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformationAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedBalanceSheetsDetails" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformationScheduleOfConsolidatedBalanceSheetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfCashFlowDetails" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfCashFlowDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfComprehensiveIncomeLossDetails" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfComprehensiveIncomeLossDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfOperationsDetails" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfOperationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/GuarantorFinancialInformationTables" xlink:href="zinc-20140630.xsd#GuarantorFinancialInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/IncomeTaxes" xlink:href="zinc-20140630.xsd#IncomeTaxes" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/IncomeTaxesDetails" xlink:href="zinc-20140630.xsd#IncomeTaxesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InsuranceRecoveries" xlink:href="zinc-20140630.xsd#InsuranceRecoveries" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InsuranceRecoveriesAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#InsuranceRecoveriesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InsuranceRecoveriesScheduleOfCostsAndInsuranceRecoveriesDetails" xlink:href="zinc-20140630.xsd#InsuranceRecoveriesScheduleOfCostsAndInsuranceRecoveriesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InsuranceRecoveriesTables" xlink:href="zinc-20140630.xsd#InsuranceRecoveriesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/Inventories" xlink:href="zinc-20140630.xsd#Inventories" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InventoriesAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#InventoriesAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InventoriesScheduleOfInventoriesDetails" xlink:href="zinc-20140630.xsd#InventoriesScheduleOfInventoriesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/InventoriesTables" xlink:href="zinc-20140630.xsd#InventoriesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebt" xlink:href="zinc-20140630.xsd#LongTermDebt" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtConvertibleSeniorNotesDetails" xlink:href="zinc-20140630.xsd#LongTermDebtConvertibleSeniorNotesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtCreditAgreementDetails" xlink:href="zinc-20140630.xsd#LongTermDebtCreditAgreementDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtInmetcoSeniorSecuredRevolvingCreditAgreementDetails" xlink:href="zinc-20140630.xsd#LongTermDebtInmetcoSeniorSecuredRevolvingCreditAgreementDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtOtherDetails" xlink:href="zinc-20140630.xsd#LongTermDebtOtherDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtRevolvingCreditAndSecurityAgreementDetails" xlink:href="zinc-20140630.xsd#LongTermDebtRevolvingCreditAndSecurityAgreementDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtScheduleOfLongTermDebtDetails" xlink:href="zinc-20140630.xsd#LongTermDebtScheduleOfLongTermDebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtSeniorSecuredNotesDetails" xlink:href="zinc-20140630.xsd#LongTermDebtSeniorSecuredNotesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtSeniorUnsecuredNotesDetails" xlink:href="zinc-20140630.xsd#LongTermDebtSeniorUnsecuredNotesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtTables" xlink:href="zinc-20140630.xsd#LongTermDebtTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/LongTermDebtZochemRevolvingCreditAndSecurityAgreementDetails" xlink:href="zinc-20140630.xsd#LongTermDebtZochemRevolvingCreditAndSecurityAgreementDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/OtherLongTermLiabilities" xlink:href="zinc-20140630.xsd#OtherLongTermLiabilities" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/OtherLongTermLiabilitiesScheduleOfOtherLongTermLiabilitiesDetails" xlink:href="zinc-20140630.xsd#OtherLongTermLiabilitiesScheduleOfOtherLongTermLiabilitiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/OtherLongTermLiabilitiesTables" xlink:href="zinc-20140630.xsd#OtherLongTermLiabilitiesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PrepaidExpensesAndOtherCurrentAssets" xlink:href="zinc-20140630.xsd#PrepaidExpensesAndOtherCurrentAssets" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails" xlink:href="zinc-20140630.xsd#PrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PrepaidExpensesAndOtherCurrentAssetsTables" xlink:href="zinc-20140630.xsd#PrepaidExpensesAndOtherCurrentAssetsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PropertyPlantAndEquipment" xlink:href="zinc-20140630.xsd#PropertyPlantAndEquipment" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PropertyPlantAndEquipmentAdditionalInformationDetails" xlink:href="zinc-20140630.xsd#PropertyPlantAndEquipmentAdditionalInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" xlink:href="zinc-20140630.xsd#PropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/PropertyPlantAndEquipmentTables" xlink:href="zinc-20140630.xsd#PropertyPlantAndEquipmentTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/RestructuringExpenses" xlink:href="zinc-20140630.xsd#RestructuringExpenses" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/RestructuringExpensesDetails" xlink:href="zinc-20140630.xsd#RestructuringExpensesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/RestructuringExpensesTables" xlink:href="zinc-20140630.xsd#RestructuringExpensesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/SegmentInformation" xlink:href="zinc-20140630.xsd#SegmentInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/SegmentInformationScheduleOfSegmentInformationDetails" xlink:href="zinc-20140630.xsd#SegmentInformationScheduleOfSegmentInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/SegmentInformationScheduleOfSegmentInformationDetails2" xlink:href="zinc-20140630.xsd#SegmentInformationScheduleOfSegmentInformationDetails2" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/SegmentInformationTables" xlink:href="zinc-20140630.xsd#SegmentInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ShareBasedCompensation" xlink:href="zinc-20140630.xsd#ShareBasedCompensation" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/ShareBasedCompensationDetails" xlink:href="zinc-20140630.xsd#ShareBasedCompensationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/SubsequentEvent" xlink:href="zinc-20140630.xsd#SubsequentEvent" xlink:type="simple" />
  <roleRef roleURI="http://www.horsehead.net/role/SubsequentEventDetails" xlink:href="zinc-20140630.xsd#SubsequentEventDetails" xlink:type="simple" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivities" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesScheduleOfFairValueOfSwapContractsAndPutOptionsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesScheduleOfGainsAndLossesResultingFromCompanysHedgingActivitiesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccountingForDerivativeInstrumentsAndHedgingActivitiesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccruedExpenses" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccruedExpensesScheduleOfAccruedExpensesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_40740782-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_40740782-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_AccruedExpensesOnEafDustProcessingReserve" xlink:label="loc_zinc_AccruedExpensesOnEafDustProcessingReserve_b57b903c-a3ec-93a3-699d-ace60c6d11f5" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_AccruedExpensesOnEafDustProcessingReserve_b57b903c-a3ec-93a3-699d-ace60c6d11f5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WorkersCompensationLiabilityCurrent" xlink:label="loc_us-gaap_WorkersCompensationLiabilityCurrent_ba7ff860-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_WorkersCompensationLiabilityCurrent_ba7ff860-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_AccruedExpensesOnUnearnedTollingRevenue" xlink:label="loc_zinc_AccruedExpensesOnUnearnedTollingRevenue_350a338e-42af-f8ef-317e-ace60c6e2519" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_AccruedExpensesOnUnearnedTollingRevenue_350a338e-42af-f8ef-317e-ace60c6e2519" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_AccruedUtilitiesElectric" xlink:label="loc_zinc_AccruedUtilitiesElectric_166c774f-a161-3708-43be-ace60c6e5d19" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_AccruedUtilitiesElectric_166c774f-a161-3708-43be-ace60c6e5d19" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_AccruedInterest" xlink:label="loc_zinc_AccruedInterest_cd39740e-116a-403e-6cbe-ace60c6e8d85" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_AccruedInterest_cd39740e-116a-403e-6cbe-ace60c6e8d85" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_UnearnedContractualServices" xlink:label="loc_zinc_UnearnedContractualServices_840abac6-d24c-11e3-b035-22000a1e8102" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_UnearnedContractualServices_840abac6-d24c-11e3-b035-22000a1e8102" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_a210dc9a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_RestructuringReserve_a210dc9a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_86fe726e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_86fe726e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/AccruedExpensesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccumulatedOtherComprehensiveIncome" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AccumulatedOtherComprehensiveIncomeComponentsOfAccumulatedOtherComprehensiveLossDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_062fd1c8-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_063c3aee-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_062fd1c8-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_063c3aee-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_06285100-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_062fd1c8-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_06285100-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/AccumulatedOtherComprehensiveIncomeTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AcquisitionOfBusiness" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/AcquisitionOfBusinessDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/BasisOfPresentation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/BasisOfPresentationRecentAccountingPronouncementsPolicies" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/CashAndCashEquivalents" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/CashAndCashEquivalentsAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/CashAndCashEquivalentsScheduleOfCashAndCashEquivalentsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_18320242-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_180c1f32-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_18320242-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_Cash_180c1f32-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashEquivalentsAtCarryingValue_18499eca-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_18320242-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_CashEquivalentsAtCarryingValue_18499eca-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/CashAndCashEquivalentsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_0ce13e30-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0ce13e30-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_18320242-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_18320242-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent" xlink:label="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_0529ba28-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_0529ba28-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_90f899ac-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_90f899ac-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_2af7d532-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0d216a96-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_2af7d532-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_940b342e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0ce13e30-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_940b342e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaap_AssetsNoncurrent_0d1ab6f6-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0ce13e30-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AssetsNoncurrent_0d1ab6f6-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_6e17fb62-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_LiabilitiesCurrent_6e17fb62-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_761ef1a8-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6e17fb62-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_LongTermDebtCurrent_761ef1a8-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_05630b34-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6e17fb62-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccountsPayableCurrent_05630b34-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6e17fb62-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_0607a31a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_761f7682-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_761f7682-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_2b46081a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_2b46081a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_1e12e4ba-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_CommitmentsAndContingencies_1e12e4ba-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_adca42f6-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_6e1ed1d0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_adca42f6-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_adca42f6-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_1e2a510e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_CommonStockValue_1e2a510e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_8fab7cfe-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PreferredStockValue_8fab7cfe-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_06e972fe-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AdditionalPaidInCapital_06e972fe-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a33a731a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_a33a731a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_062fd1c8-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_adc32df4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_062fd1c8-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_7a4f00ec-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_adca42f6-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_MinorityInterest_7a4f00ec-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/ConsolidatedStatementOfStockholdersEquity" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_181e990a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/ConsolidatedStatementsOfComprehensiveLossIncome" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_81a3933a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_81a3933a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_827d625e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_81a3933a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_827d625e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_8028df7e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_a7332b38-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8028df7e-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_SalesRevenueNet_a7332b38-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_a73282be-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesRevenueNet_a7332b38-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_a73282be-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RecyclingRevenue" xlink:label="loc_us-gaap_RecyclingRevenue_9d4b911e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesRevenueNet_a7332b38-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_RecyclingRevenue_9d4b911e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SalesRevenueServicesNet" xlink:label="loc_us-gaap_SalesRevenueServicesNet_a73bc11c-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SalesRevenueNet_a7332b38-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_SalesRevenueServicesNet_a73bc11c-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_23967884-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8028df7e-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_CostsAndExpenses_23967884-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_CostOfSalesExcludingDepreciationAndAmortization" xlink:label="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_23967884-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_CostsOfGoodsSoldExcludingDepreciationAndAmortization" xlink:label="loc_zinc_CostsOfGoodsSoldExcludingDepreciationAndAmortization_2f1855f4-bf85-cdda-6dd7-ace60c6fc3cd" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:to="loc_zinc_CostsOfGoodsSoldExcludingDepreciationAndAmortization_2f1855f4-bf85-cdda-6dd7-ace60c6fc3cd" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_CostOfSalesOfNickelBasedMaterialAndOtherServicesExcludingDepreciationAndAmortization" xlink:label="loc_zinc_CostOfSalesOfNickelBasedMaterialAndOtherServicesExcludingDepreciationAndAmortization_44e8f34f-5f5b-d37b-0e92-ace60c6cd154" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:to="loc_zinc_CostOfSalesOfNickelBasedMaterialAndOtherServicesExcludingDepreciationAndAmortization_44e8f34f-5f5b-d37b-0e92-ace60c6cd154" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CostOfServices" xlink:label="loc_us-gaap_CostOfServices_236e061a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:to="loc_us-gaap_CostOfServices_236e061a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_a1ffebce-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:to="loc_us-gaap_RestructuringCharges_a1ffebce-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnusualOrInfrequentItemInsuranceProceeds" xlink:label="loc_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_b3641fd4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_CostOfSalesExcludingDepreciationAndAmortization_49589b79-a5c3-0961-0586-ace60c6f606b" xlink:to="loc_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_b3641fd4-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_3285f6bc-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_23967884-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DepreciationAndAmortization_3285f6bc-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_aace0d80-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_23967884-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_aace0d80-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_7d82877a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InterestAndDebtExpense" xlink:label="loc_us-gaap_InterestAndDebtExpense_678f423c-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_7d82877a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InterestAndDebtExpense_678f423c-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_852fe0f8-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_7d82877a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_852fe0f8-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6058d0a0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6058d0a0-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_610ca94a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_610ca94a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/Contingencies" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/DeferredFinanceCostsAndOtherDeferredFinanceCostsAndOtherDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent_90fa2d58-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_29f4d45a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent_90fa2d58-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_29f4d45a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseOtherNoncurrent" xlink:label="loc_us-gaap_PrepaidExpenseOtherNoncurrent_90dfbf86-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent_90fa2d58-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PrepaidExpenseOtherNoncurrent_90dfbf86-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/DeferredFinanceCostsAndOtherTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/DepositsAndOther" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/DocumentAndEntityInformation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EarningsPerShare" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EarningsPerShareAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EarningsPerShareScheduleOfAntiDilutiveSharesExcludedFromEarningsPerShareCalculationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EarningsPerShareScheduleOfInformationUsedToComputeBasicAndDilutedEarningsLossPerShareDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b93d27d4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_6554f444-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b93d27d4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_6554f444-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_6521035a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b93d27d4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_6521035a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsRestrictedStock" xlink:label="loc_zinc_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsRestrictedStock_8f5f735f-4062-4488-6230-ace60c6fa6cf" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b93d27d4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsRestrictedStock_8f5f735f-4062-4488-6230-ace60c6fa6cf" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_b91dcd62-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_b93d27d4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_b91dcd62-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/EarningsPerShareTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EmployeeBenefitPlans" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EmployeeBenefitPlansAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/EmployeeBenefitPlansScheduleOfNetPeriodicBenefitCostsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2f01b4a4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_2ed07830-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2f01b4a4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_2ed07830-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_2ef72430-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2f01b4a4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_2ef72430-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2f0f96fa-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2f01b4a4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2f0f96fa-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2d21ca20-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2f01b4a4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2d21ca20-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/EmployeeBenefitPlansTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformationAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedBalanceSheetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaap_AssetsNoncurrent_0d1ab6f6-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6701f814-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_0d1ab6f6-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6701f814-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_InvestmentInAndAdvancesToAffiliates" xlink:label="loc_zinc_InvestmentInAndAdvancesToAffiliates_9f1beab2-329c-47dc-754f-ace60c6cb299" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_0d1ab6f6-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_InvestmentInAndAdvancesToAffiliates_9f1beab2-329c-47dc-754f-ace60c6cb299" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent_90fa2d58-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_0d1ab6f6-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsNoncurrent_90fa2d58-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfCashFlowDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_181e990a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_181e990a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProfitLoss_93e5ee3a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_328d60be-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_328d60be-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_GainOnInsuranceRecoveryRelatedToFixedAssets" xlink:label="loc_zinc_GainOnInsuranceRecoveryRelatedToFixedAssets_a86038b6-45ba-9873-df87-ace60c6f926b" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_GainOnInsuranceRecoveryRelatedToFixedAssets_a86038b6-45ba-9873-df87-ace60c6f926b" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2a198e26-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_2a198e26-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_0c2b0700-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AmortizationOfDebtDiscountPremium_0c2b0700-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccretionExpense" xlink:label="loc_us-gaap_AccretionExpense_0599cb42-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccretionExpense_0599cb42-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_0c1127ae-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_0c1127ae-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets_58ab06ca-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets_58ab06ca-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_b2fa0590-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_b2fa0590-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="loc_us-gaap_InventoryWriteDown_69d86ed8-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InventoryWriteDown_69d86ed8-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_ab78f61e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ShareBasedCompensation_ab78f61e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_CapitalizationOfInterest" xlink:label="loc_zinc_CapitalizationOfInterest_4fbabb5f-7143-865a-1b57-ace60c6e9a09" xlink:type="locator" />
    <calculationArc order="12" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_CapitalizationOfInterest_4fbabb5f-7143-865a-1b57-ace60c6e9a09" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_EquityInIncomeOfSubsidiariesNetOfTaxes" xlink:label="loc_zinc_EquityInIncomeOfSubsidiariesNetOfTaxes_e7f60c4e-08e2-3d56-350f-ace60c6dd8f2" xlink:type="locator" />
    <calculationArc order="13" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_EquityInIncomeOfSubsidiariesNetOfTaxes_e7f60c4e-08e2-3d56-350f-ace60c6dd8f2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_63416f02-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="14" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_63416f02-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_63654850-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="15" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_63654850-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_63b112d0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="16" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_63b112d0-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInDepositOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInDepositOtherAssets_62b2a290-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="17" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInDepositOtherAssets_62b2a290-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_62fc0fe8-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="18" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_62fc0fe8-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_63111686-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="19" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_63111686-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_6310926a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="20" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7cb5e5da-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_6310926a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7c8e1730-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_181e990a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7c8e1730-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_8b21b464-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7c8e1730-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_8b21b464-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="loc_us-gaap_IncreaseDecreaseInRestrictedCash_63cd9f36-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7c8e1730-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_IncreaseDecreaseInRestrictedCash_63cd9f36-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_InvestmentInAndAdvanceToFromSubsidiaries" xlink:label="loc_zinc_InvestmentInAndAdvanceToFromSubsidiaries_dee6201c-b790-a791-63f4-ace60c6d0ae0" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7c8e1730-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_InvestmentInAndAdvanceToFromSubsidiaries_dee6201c-b790-a791-63f4-ace60c6d0ae0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_181e990a-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_91901b4c-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_91901b4c-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromPaymentsToMinorityShareholders" xlink:label="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_92613a6a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_92613a6a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_92e3dbe6-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_92e3dbe6-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_a10ca05e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_a10ca05e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_8b69df8c-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_8b69df8c-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_92dcda4e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_92dcda4e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_a118d45a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_a118d45a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_9308e58a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_9308e58a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_TaxEffectFromShareBasedCompensationFinancingActivitiesNet" xlink:label="loc_zinc_TaxEffectFromShareBasedCompensationFinancingActivitiesNet_fb7d5730-ff57-9462-aa4f-ace60c6ed9e0" xlink:type="locator" />
    <calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_TaxEffectFromShareBasedCompensationFinancingActivitiesNet_fb7d5730-ff57-9462-aa4f-ace60c6ed9e0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_894a3350-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_7ca2b500-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_894a3350-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfComprehensiveIncomeLossDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformationScheduleOfConsolidatedStatementsOfOperationsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6058d0a0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_8028df7e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6058d0a0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_OperatingIncomeLoss_8028df7e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_EquityInIncomeOfSubsidiariesNetOfTaxes" xlink:label="loc_zinc_EquityInIncomeOfSubsidiariesNetOfTaxes_e7f60c4e-08e2-3d56-350f-ace60c6dd8f2" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6058d0a0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_EquityInIncomeOfSubsidiariesNetOfTaxes_e7f60c4e-08e2-3d56-350f-ace60c6dd8f2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_7d82877a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6058d0a0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_7d82877a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/GuarantorFinancialInformationTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/IncomeTaxes" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/IncomeTaxesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/InsuranceRecoveries" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/InsuranceRecoveriesAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/InsuranceRecoveriesScheduleOfCostsAndInsuranceRecoveriesDetails" xlink:type="extended">
    <loc xlink:href="zinc-20140630.xsd#zinc_AccidentCostsIncludedInCostOfSales" xlink:label="loc_zinc_AccidentCostsIncludedInCostOfSales_b963bebb-471b-3a11-7794-ace60c6e6732" xlink:type="locator" />
    <loc xlink:href="zinc-20140630.xsd#zinc_PropertyDamageInsuranceRecovery" xlink:label="loc_zinc_PropertyDamageInsuranceRecovery_25c45233-6542-e8b5-3b20-ace60c6d2fb4" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_AccidentCostsIncludedInCostOfSales_b963bebb-471b-3a11-7794-ace60c6e6732" xlink:to="loc_zinc_PropertyDamageInsuranceRecovery_25c45233-6542-e8b5-3b20-ace60c6d2fb4" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_AccidentCleanUpExpense" xlink:label="loc_zinc_AccidentCleanUpExpense_fa4e14d4-0639-02a3-abde-ace60c6d9a0e" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_AccidentCostsIncludedInCostOfSales_b963bebb-471b-3a11-7794-ace60c6e6732" xlink:to="loc_zinc_AccidentCleanUpExpense_fa4e14d4-0639-02a3-abde-ace60c6d9a0e" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_WriteOffOfAssetsInConnectionWithInsuranceRecovery" xlink:label="loc_zinc_WriteOffOfAssetsInConnectionWithInsuranceRecovery_45a0a993-1a39-0f94-01d0-ace60c6edb2c" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_zinc_AccidentCostsIncludedInCostOfSales_b963bebb-471b-3a11-7794-ace60c6e6732" xlink:to="loc_zinc_WriteOffOfAssetsInConnectionWithInsuranceRecovery_45a0a993-1a39-0f94-01d0-ace60c6edb2c" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/InsuranceRecoveriesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/Inventories" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/InventoriesAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/InventoriesScheduleOfInventoriesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="loc_us-gaap_InventoryRawMaterials_6a0b4de4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InventoryRawMaterials_6a0b4de4-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="loc_us-gaap_InventoryWorkInProcess_69f117d0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InventoryWorkInProcess_69f117d0-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="loc_us-gaap_InventoryFinishedGoods_6953de16-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InventoryFinishedGoods_6953de16-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_InventorySuppliesNetOfReserves" xlink:label="loc_us-gaap_InventorySuppliesNetOfReserves_6a055538-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_6952f2e4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_InventorySuppliesNetOfReserves_6a055538-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/InventoriesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebt" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtConvertibleSeniorNotesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtCreditAgreementDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtInmetcoSeniorSecuredRevolvingCreditAgreementDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtOtherDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtRevolvingCreditAndSecurityAgreementDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtScheduleOfLongTermDebtDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_754fc3b0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_NotesAndLoansPayableCurrent" xlink:label="loc_us-gaap_NotesAndLoansPayableCurrent_7d975a4c-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_754fc3b0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_NotesAndLoansPayableCurrent_7d975a4c-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_761f7682-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_754fc3b0-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_761f7682-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtSeniorSecuredNotesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtSeniorUnsecuredNotesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/LongTermDebtZochemRevolvingCreditAndSecurityAgreementDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/OtherLongTermLiabilities" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/OtherLongTermLiabilitiesScheduleOfOtherLongTermLiabilitiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="zinc-20140630.xsd#zinc_EnvironmentalObligations" xlink:label="loc_zinc_EnvironmentalObligations_fa85322d-208f-4b56-6953-ace60c6f4928" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_EnvironmentalObligations_fa85322d-208f-4b56-6953-ace60c6f4928" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_InsuranceClaimLiabilities" xlink:label="loc_zinc_InsuranceClaimLiabilities_ebf56c7e-dd5e-84e0-b11d-ace60c6ea883" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_InsuranceClaimLiabilities_ebf56c7e-dd5e-84e0-b11d-ace60c6ea883" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AssetRetirementObligationsNoncurrent" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_0c7f60fc-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_0c7f60fc-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_DeferredPurchasePriceObligation" xlink:label="loc_zinc_DeferredPurchasePriceObligation_d68a3d6f-e981-6e88-ea54-ace60c6e625b" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_DeferredPurchasePriceObligation_d68a3d6f-e981-6e88-ea54-ace60c6e625b" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_OtherLongTermLiabilities" xlink:label="loc_zinc_OtherLongTermLiabilities_ed350f74-3ef3-bef4-4e9f-ace60c6f6ea9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_85390368-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_OtherLongTermLiabilities_ed350f74-3ef3-bef4-4e9f-ace60c6f6ea9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/OtherLongTermLiabilitiesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/PrepaidExpensesAndOtherCurrentAssets" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/PrepaidExpensesAndOtherCurrentAssetsScheduleOfPrepaidExpensesAndOtherCurrentAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_90f899ac-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="loc_us-gaap_PrepaidTaxes_90f6567e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_90f899ac-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PrepaidTaxes_90f6567e-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="zinc-20140630.xsd#zinc_PrepaidHedgeContractsExpenses" xlink:label="loc_zinc_PrepaidHedgeContractsExpenses_8236ecb6-7feb-0cab-b386-ace60c6f7ee4" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_90f899ac-9656-11e2-88e7-12313d1a0274" xlink:to="loc_zinc_PrepaidHedgeContractsExpenses_8236ecb6-7feb-0cab-b386-ace60c6f7ee4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_OtherPrepaidExpenseCurrent" xlink:label="loc_us-gaap_OtherPrepaidExpenseCurrent_8555fff4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_90f899ac-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_OtherPrepaidExpenseCurrent_8555fff4-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/PrepaidExpensesAndOtherCurrentAssetsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/PropertyPlantAndEquipment" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/PropertyPlantAndEquipmentAdditionalInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/PropertyPlantAndEquipmentScheduleOfPropertyPlantAndEquipmentDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_940b342e-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_9406abd4-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_940b342e-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_9406abd4-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_LandAndLandImprovements" xlink:label="loc_us-gaap_LandAndLandImprovements_6b8b76da-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_9406abd4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_LandAndLandImprovements_6b8b76da-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="loc_us-gaap_BuildingsAndImprovementsGross_0fffe210-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_9406abd4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_BuildingsAndImprovementsGross_0fffe210-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="loc_us-gaap_MachineryAndEquipmentGross_78576fe0-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_9406abd4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_MachineryAndEquipmentGross_78576fe0-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="loc_us-gaap_ConstructionInProgressGross_2155ca7a-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_9406abd4-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_ConstructionInProgressGross_2155ca7a-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2013/elts/us-gaap-2013-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_061c48ec-9656-11e2-88e7-12313d1a0274" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_940b342e-9656-11e2-88e7-12313d1a0274" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_061c48ec-9656-11e2-88e7-12313d1a0274" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.horsehead.net/role/PropertyPlantAndEquipmentTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/RestructuringExpenses" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/RestructuringExpensesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/RestructuringExpensesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/SegmentInformation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/SegmentInformationScheduleOfSegmentInformationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/SegmentInformationScheduleOfSegmentInformationDetails2" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/SegmentInformationTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/ShareBasedCompensation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/ShareBasedCompensationDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/SubsequentEvent" xlink:type="extended" />
  <calculationLink xlink:role="http://www.horsehead.net/role/SubsequentEventDetails" xlink:type="extended" />
</linkbase>


