钢铁工业资源综合利用设计规范（英文版）

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Foreword

ThiscodeismodifiedbyCapitalEngineeringandResearchIncorporationLimited(CERI)inconjunctionwithotherrelevantorganizationsaccordingtotherequirementsofDocumentJIANBIAO[2013]No.169issuedbytheMinistryofHousingandUrban-RuralDevelopment,P.R.China(MOHURD)-"NoticeonPrinting'theDevelopmentandRevisionPlanofNationalEngineeringConstructionStandardsin2014'".

Themodificationincludesthefollowingcontents:

(1)Accordingtotherequirementsofrelatedlaws,regulations,policiesandstandardsnewlyissuedbythestate,thebasicrequirementsofGB50405-2007CodeforDesignofComprehensiveUtilizationofIronandSteelIndustryResources(hereinafterreferredtoasoriginalcode),andtherelatedcontentsofcomprehensiveutilizationdesignofsourcesineachprocedureofironandsteelindustryismodifiedanddetailed.

(2)Accordingtothecurrentnationalindustriesclassification,therareearthmetalproductionbelongstononferrousmetalindustry,andtheGB-50988-2014CodeforDesignofEnvironmentProtectionEngineeringofNonferrousMetalsIndustryhasbeenissued.Therelatedcontentsofcomprehensiveutilizationdesignofrareearthresourcesaredeleted.

(3)Inthedesignofcomprehensiveutilizationoforeminingresources,thecomprehensiveutilizationofwasterocks,tailingsandslagproducedinthemineralresourcedevelopmentandutilizationprocessisusedasthemaindesigncontent.

(4)Thedesigncontentofcomprehensiveutilizationofwasteheat,wastepressure,combustiblegasesandotherregeneratedresourcesintheproductionprocessofeachprocedurearemodifiedanddetailed.

Thiscodecomprises4chapterswiththemaincontentsincludinggeneralprovisions,terms,basicrequirementsanddesignofcomprehensiveutilizationofprocedureresources.

Theprovisionsprintedinboldtypeinthiscodearecompulsoryandmustbeenforcedstrictly.

MOHURDisinchargeoftheadministrationofthiscodeandtheexplanationofthecompulsoryprovisions.ChinaMetallurgicalConstructionAssociationtakesresponsibilityforroutinemanagement,andCERIisresponsibleforexplainingthetechnicaldetails.Allrelevantorganizationsarekindlyrequestedtosumupexperiencesandaccumulatethedataduringtheprocessofimplementingthiscode.Ifanyamendmentandadditionisfoundnecessary,pleasemailyourcommentsandsuggestionstotheCodeAdministrationOfficeofCERI(Address:No.7Jiananjie,BeijingEconomicandTechnicalDevelopmentArea;Postcode:100176)forreferencesinfuturerevision.

ChiefDevelopmentOrganization,Co-DevelopmentOrganizations,ChiefDraftersandChiefReviewersofthiscode:

ChiefDevelopmentOrganization:

CERI

Co-DevelopmentOrganizations:

ZHONGYECHANGTIANINTERNATIONALENGINEERINGCo.,Ltd.

CISDIENGINEERINGCo.,Ltd.

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NorthernEngineeringandTechnologyCorporationMCC

ACRECokingandRefractoryEngineeringConsultingCorporation,MCCBaoshanIron&.SteelCo.,Ltd.

WISDRIEngineering&.ResearchIncorporationLimited

ShandongIron&.SteelGroupCompanyLimited

BERISENGINEERINGANDRESEARCHCORPORATION

ChiefDrafters:

XIAOYingXINGFangfangLIUKunXIONGYingZHOUYulian

WANGDongZHENGSuixuWUJianCHENJianLIUJianping

ZHUHuilingRENHaixiaLIANGKailiWANGShushengXIAKebin

ChiefReviewers:

GUOQijiao,HUANGDao,LIYouhu,NIUJingkao,ZHENGWenhua,

CANGDaqiang,ZHANGQixuan,LUZhongfei,WANGLiying,GUOJuncai,LVJie

Contents

1Generalprovisions (1)

2Terms (2)

3Basicrequirements (3)

4Designofcomprehensiveutilizationofprocedureresources (4)

4.1Oremining (4)

4.2Oredressing (4)

4.3Rawmaterialyard (5)

4.4Sinteringandelleizing (5)

4.5Coking (5)

4.6Ironmaking (7)

4.7Stelmakingandconiuouscasting (7)

4.8Steelrollingandmetalproducts (8)

4.9Metallurgicallimeandrefractorymaterial (9)

4.10Ferroalloy (9)

4.11Carbon (10)

4.12Publicandauxiliaryfacilities (10)

Explanationofwordinginthiscode (12)

Listofquotedstandards (13)

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1Generalprovisions

1.0.1Thecodeisestablishedtofullyimplementthenationallawsandregulationsonenergyconservationandemissionreductionandresourcecomprehensiveutilizationandthedevelopmentstrategyofironandsteelindustry,developcirculareconomy,promotecleanproduction,conserveresources,protectecologicalenvironment,increaseeconomicbenefitsofenterprises,andtakethesustainabledevelopmentpath.

1.0.2Thecodeisapplicabletothedesignofconstructionprojectofironandsteelindustry.Theironandsteelindustryincludesironore,manganeseoreandchromiumoremininganddressing,sintering,pelletizing,coking,ironmaking,steelmaking,steelrolling,ferroalloy,carbon,refractorymaterials,metalproductandotherauxiliaryprocesses.Theresourcecomprehensiveutilizationofironandsteelindustryincludesthecomprehensiveutilizationonwasterocksandtailingsproducedinthedevelopmentandutilizationprocessoforeresources,andcomprehensiveutilizationofores,variouswasteslag,wastewater,wasteliquid,wastegas,wasteheat,wastepressureandcombustiblegasproducedintheproductionprocessofironandsteelindustry.

1.0.3Thedesignofresourcecomprehensiveutilizationofconstructionprojectofironandsteelindustryshallmeetthecode,andalsomeettherelatedrequirementsofcurrentnationalstandards.

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2Terms

2.0.1Comprehensiveutilizationofironandsteelindustryresources

Theresourcecomprehensiveutilizationofironandsteelindustrymainlyincludesthecomprehensiveutilizationofwasterockandtailingsinthedevelopmentandutilizationprocessoforeresources,andcomprehensivedevelopmentandutilizationofslag,wasteslag,wastewater,wasteliquid,wastegas,wasteheat,wastepressure,andcombustiblegasintheproductionprocessofironandsteelenterprise.

2.0.2Secondaryenergy

Theprimaryenergyisdirectlyorindirectlyprocessedorconvertedtootherkindsandtypesofenergy.

2.0.3Wasteheat

Thewasteheatistheheatenergywhichisnotutilizedinthehotprocessandisexhaustedintosurroundingenvironment.Thewasteheatcanbeclassifiedintowasteheatofsolidcarrier,wasteheatofliquidcarrierandwasteheatofgascarrieraccordingtocarriertypes.

2.0.4Wastepressure

Thewastepressureisthepressureoffluiddrainedinthepressurizingprocess,i.e.differencewithstandardatmospherepressure.Thewastepressurecanbeclassifiedintogaswastepressureandliquidwastepressureaccordingtofluidtypes.

2.0.5Comprehensiveenergyconsumptionofunitproduct

Variousenergyconsumedbytheunitproductofenterprisewithinthereportperiod;therecycledenergyoftheproceduresarededucted,andtheactuallyconsumedenergyareconvertedintothestandardtotalamountofcoal.

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3Basicrequirements

3.0.1Thedesigndocumentofconstructionprojectshallcovertheapplicabledesigncontentsofresourcecomprehensiveutilization.

3.0.2Thedesignofresourcecomprehensiveutilizationshallnotutilizetheprocess,technologyandequipmentwhichareclearlyeliminatedandprohibitedbythestate.

3.0.3Theresourcecomprehensiveutilizationfacilityshallbesimultaneouslyperformedwithmainworksindesign,constructionandrunning.

3.0.4Whenthemainworkisconstructedbyphases,theresourcecomprehensiveutilizationfacilityshallbeplannedaccordingtotheoverallplan.

3.0.5Thewater-savingprocess,technologyandequipmentwithlesswaterconsumptionandnowaterconsumptionshallbeadoptedinconstructionproject.

3.0.6Themunicipalmiddlewatershallbeusedforthewatersourceofwaterutilizationindesignofconstructionprojectaswholeorpartofwatersupplysource.

3.0.7Theconstructionprojectshallbedesignedwiththeapplicablecirculatingwatersystemaccordingtothewatertreatmentsystemofeachproductionprocedureandthewateramountandwaterqualityofdrainedwater.Onthebasis,thecascadewaterutilizationsystembetweenproceduresandthecentralizedsewagetreatmentplantofwholefactoryshallbeestablishedsoastofurthestrecyclethe

wastewaterresources.

3.0.8Thecombustiblegas,wasteheatandwastepressureintheproductionprocessshallbefullyrecycledinthedesignofconstructionproject.

3.0.9Thelargeandmediumcomprehensiveironandsteelenterpriseshallestablishtheenergysourcemanagementcenter.

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4Designofcomprehensiveutilizationofprocedureresources

4.1Oremining

4.1.1Thestrippedtillagelayersandmellowsoilattheopenminingyards,wastedumpsandindustrialsitesshallbeseparatelyandproperlystored,andusedforgreeningandlandreclamation.

4.1.2Thelow-gradeoresandrefractoryoresshallbesinglyandproperlystackedinthesitewhichissuitableforsecondaryloadingandtransportation.Aftertheconditionsarefulfilled,theresourcesshallbeutilized.

4.1.3Thepoisonlesswasterockshallbeusedtofilltheexposedminingpits,undergroundgoafs,andminingcollapsingpits,orasbuildingmaterial.

4.1.4Afterminewaterofopenpitandundergroundminearecollectedandtreated,thepurifyingclarifiedwaterandprecipitatedsludgeshallberecycled.

4.1.5Theleachingwaterproducedatthewastedumpshallbepurifiedandrecycled.

4.1.6Thewasteopenminingyardandwastedumpshalltakelandreclamationmeasures,andthelandshallbereutilizedaccordingtolocalconditions.

4.2Oredressing

4.2.1Thecomprehensiverecyclingoftailingsafteroredressingshallbedesignedaccordingtotheoreprocessingtestandstudyreportsubmittedbytheoreprocessingtestandstudydepartment.Thetestmethodandtestscaleofcomprehensiverecyclingoftailingsshallbedeterminedbythedesignunitandstudydepartment.

4.2.2Theheavymediumoredressingprocessshallbeequippedwithmediumrecyclingfacility,andtheseparateddilute-phasewasteliquidshallberecycled.

4.2.3Theconcentratefiltrateofwetoredressing,flushingwaterofconcentrateconveyingpipeline,concentrationoverflowwateroftailingslurry,andclarifiedwateroftailingspondshallberecycled;theseepagewaterinfrontoftailingwarehousedamshallbecollectedandutilized.

4.2.4Aftertheoredressingwastewater,dedustingwastewater,andfloorflushingwastewaterarecollectedandtreated,thepurifyingclarifiedwatershallberecycled;theprecipitatedsludgecanberecycledaccordingtooregradeandpracticalconditions.

4.2.5Thedustcollectedbythededustingsystemoforedressingprocedure,andtheoreslurrydischargedundertheemergencyandoverhaulingconditionsintheoregrinding,sortinganddewateringproceduresshallbereturnedbackintoprocesssystemtoberecycled.

4.2.6Thewasteheatofhigh-temperaturefluegasproducedintheroastingrotarykilnandverticalfurnaceshallbeutilized.

4.2.7Thetailingscontainingvaluablemetalsandothercomponentswithhighaddedvalueintheoredressingprocessshallbedressedagain.Thetailingswhichcannotbere-dressedshallbeseparatelyandproperlystoredinthetailingpondsortailingstackyard,andcannotberecycleduntilthetechnicalandeconomicconditionsarefulfilled.

4.2.8Thetailingswithoutrecyclingvalueshallbeusedforfillingthemineundergroundgoafandopen

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miningpits,beusedasproductionbuildingmaterials,orbeusedforothercomprehensiveutilizationpurposes.

4.2.9Afterthetailingwarehouseortailingstackyardforstoringwastetailingsisclosed,thelandreclamationmeasuresshallbetaken,andthelandshallbereutilized.

4.3Rawmaterialyard

4.3.1Theiron-containingdustsludge,coal-containingdustsludgeandlimestonepowderproducedintherawmaterialyardshallberecycledaccordingtotypes.

4.3.2Therawmaterialyardshallbeequippedwithdustsludgestorage,blendingandtransportationfacilities.Thesludgeshallbedewateredandthensentintorawmaterialyard.

4.3.3Theindirectcoolingwaterofequipmentshallberecycledaftercooling.Theflushingwastewaterandotherturbidwastewatershallberecycledaftertreatment.

4.3.4Intheareaswithhigherwindspeed,theclosedtypestorageprocessorothermaterialreductionmeasuresshallbetakenforthedustpronerawmaterialyards.

4.4Sinteringandpelletizing

4.4.1Thedustrecycledbythededustingfacilitiesofrawmaterialsystem,mixturesystem,sinteringmachine,grate-rotarykiln,travelinggratepelletizingmachine,shaftfurnace,coolingmachine,finishedproductgranulatingsystem,andfinishedproductstorageandtransportationsystemshallbereturnedbackintotheprocesssystemtoberecycledasrawmaterial.

4.4.2Thedustdustofthirdandfourthelectricfieldsofelectricprecipitatorofsinteringmachineheadshallbesinglycollected,andcomprehensivelyutilized.

4.4.3Thedustsludgecontainedinthefloorflushingwaterofsinteringandpelletizingplants(workshops)andthewaterofwetscrubbershallbereturnedbackintotheproductionsystemtobeerecycled.

4.4.4Thewastewaterofcirculatingwatersysteminsinteringandpelletizingproductionprocessesandwetscrubbingsystemshallbeutilizedincascadeandrecyclingwaysaftertreatment.

4.4.5Thefluegascirculatingtechnologyshallbeadoptedinthesinteringproduction,andthesensibleheatoffluegasisrecycled,soastoreducetheconsumptionofsolidfuel.Thesensibleheatofsintershallberecycled,andbeutilizedincascade.

4.4.6Thewasteheatofhotfluegasandhotblastproducedinthepelletizingshallbecomprehensivelyrecycled.

4.4.7Thefluegascleaningtechnologyshallbeadoptedfortheroastingfluegasinthesinteringandpelletizingandbyproductsshouldbecomprehensivelyutilized.

4.5Coking

4.5.1Theautomaticcoalblendingcokingshouldbeadoptedforcokingplant.

4.5.2Thenewcokeovenshallbebuiltwithcokedryquenchingdeviceatthesameperiod.

4.5.3Thelargecokedryquenchingdeviceshouldbeequippedwithboilerswithhigh-temperatureandhigh-pressurenaturalcirculation.

4.5.4Thecoaldusttrappedbythedustcollectorofcoalcrushingmachineshallbereturnedbacktothecoalchargingsystem.

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4.5.5Dustcollectedbythededustinggroundstationsofcoketreatmentsystem,coalcharge,cokedischargeandcokedryquenchingshallbesentintothesinteringplantasthefuel.

4.5.6Thecokepowderproducedbythewetcokequenchingshouldbedewatered,andthensentintothesinteringplantasthefuel.

4.5.7Thewasteheatofthefluegasofcokeovencanberecycled.

4.5.8Thegascleaningdeviceshallbeequippedwithtarandammoniawaterseparationunit,andgasdesulfurization,decyanation,denitrifyinganddebenzolizationunits.

4.5.9Forthewasteliquidproducedbythedesulfurizationanddecyanationunits,thefollowingchemicalengineeringproductsshallberecycledaccordingtothedifferentprocesses:

1Extractthethiocyanateandthiosulfateproducts.

2Mixwiththerecycledsulfur,andincinerate,soastopreparesulfuricacid.

4.5.10Thetarresiduesdischargedbygascleaningdeviceandtarprocessingdevice,andacidtar,andacidtarexhaustedbyammoniasulfateunitshallbemixedintothecokingcoaltoberecycled.

4.5.11Theoilwashingregeneratedresiduesofcrudebenzene,andthesolventregenerationresiduesofsolventdephenolizationunitshallbemixedintotartoberecycled.

4.5.12Thedistillationresiduesinphenolrefiningandpyridinerefiningprocessesshallbedirectlypreparedintofueloilorotheroilproducts,

4.5.13Thesublimednaphthalenetrappedbyflakingandpackageofindustrialnaphthalenedistillationunitandnaphthalenerefiningdeviceshalbereturnedbackintoprocesssystem.

4.5.14Thecarbondioxidedecomposingprocessshallbeadoptedforthephenolsaltdecomposingunit.Theproducedsodiumcarbonate-containingwastewatershallbesentintophenol-cyanogenwastewatertreatmentstationasthemake-upalkalinesource.

4.5.15Variousemptyingliquidsofequipmentandpipelinearerespectivelycollectedintoemptyingtanks,andarereturnedintoprocesssystemtoutilize.

4.5.16Thecollectedsteamcondensateshallberecycled.

4.5.17/Thepretreatmentdeoilingfacilityofphenol-cyanogenwastewatertreatmentstationshallrecycletheoifinwastewater,andtheoilshallbesentintothetarandammoniawaterseparationequipmenttorecycle.

4.5.18Thewastewaterreachingstandardafterbiochemicaltreatmentcanbeusedforsteelmakingslagsoaking,sinteringmixturehumidifying,andironmakinggranulation.Undertheconditionoffailureincompletedigestion,thewastewatershallbedeeplytreated,andbeusedasthemake-upwaterofcirculatingwatersystem.

4.5.19Thedomesticsewageshouldbeusedastheprocesswaterofphenol-cyanogenwastewatertreatmentstation.

4.5.20Thecoaltarshallbecentrallyprocessed;theunittreatmentcapacityofnewcoaltarprocessingdeviceshallreach150000tandaboveofanhydroustarperyear.

4.5.21Thehydrorefiningtechnologyshallbeadoptedincrudebenzenerefining.Theunittreatmentcapacityofnewcrudebenzenehydrorefiningdeviceshallreach100000tandaboveofcrude(light)benzeneperyear.

4.5.22Thecokeovengasshalltakethegasbleedingmeasures,andthecokeovengasshallbecomprehensivelyutilized.

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4.6Ironmaking

4.6.1Theironmakingprocessshalltakethecleanproductiontechnicalmeasurestoreducetheconsumptionofcoke.Thenutcokeunderthesieveshallberecycledforironmaking.

4.6.2Theironmakinggasshallbecleanedandutilizedasthesecondaryenergy;thegasholdershallbeinstalled,andtheremaininggasshallbeconvertedintoelectricenergyorsteamforutilization.

4.6.3Allfurnaceslagshallbecomprehensivelyutilized,thewaterquenchingtechnologyshallbeadoptedandusedforproducingslagmicropowderorusedasmixtureofcement.

4.6.4Thewasteheatofgranulatingwatershallberecycled.

4.6.5Aftertheironelementintheslagisrecycled,theironmakingdryslagshallbeusedasthebuildingmaterial.

4.6.6Theiron-containingdustshallberecycledasrawmaterial.

4.6.7Theiron-containingdustwithhighercontentofzinc,lead,potassiumandsodiumshallberecycledasrawmaterial.

4.6.8Theindirectcoolingwastewaterandturbidwastewatershallberespectivelyequippedwithcirculatingwatersystems,andthecascadeblowdownypeshallbeadopted,soastoimprovetherepeatedutilizationrateofwater.

4.6.9Thehighpressuretopoperationprocessshallbeadoptedfortheironmaking,andalsothegaswastepressureutilizationdeviceisbuilt.

4.6.10Thegasshallbecleanedbydrygascleaningsystem,andthedrytypeblastfurnacetopgasrecoveryturbinedevice(TRT)oraxialcompressor,andenergyrecyclingturbinecoaxialunit(BPRT)shallbeselectedforthegaswastepressureutilizationdevice.

4.6.11Thehotstoveshall/beequippedwithfluegaswasteheatrecoverydevice,andthecombustionairandgaspreheatingprocessshallbeadoptedthegaswithlowcalorificvalueisusedforreplacingthehigh-qualitygasfuel.

4.7Steelmakingandcontinuouscasting

4.7.1Allslagshallbecomprehensivelyutilized.Theslagshallbepelletizedbyhotsoakinganddrumtreatmentprocess.Theslagmagneticdressingandsortinglineshallbeinstalled,andthesortedmetalshallbereturnedbacktoproduction;thetailslagshallbedeeplyprocessedandutilizedasresource.

4.7.2Thedustproducedintheconvertersmelting,refiningandhotmetalpretreatmentandthedustsludgeofconvertergascleaningshallberecycledandutilized.

4.7.3Thewastewaterofconvertergaswetcleaningshallberecycledaftertreated.

4.7.4Thesecondarycoolingwaterofcontinuouscastingshallberecycledaftertreated,andthecollectedscaleshallbecomprehensivelyutilized.

4.7.5Theconvertersteelmakingshallbebuiltwiththegasrecyclingsystematthesameperiod.

4.7.6Theconvertergasshallbecleanedbythedrycleaningprocess;therecyclingindexofconvertergasshallbenolessthan90N·m³/t(steel);thecalorificvalueshallbenolessthan1800kcal/(N·m³).

4.7.7Theconvertershallbeequippedwithevaporativecoolingdevicetorecyclethewasteheatofconverterfluegas,andtherecyclingamountofwasteheatsteamofuncombustionmethodshallbenolowerthan80kg/t(steel).

4.7.8Theelectricarcfurnaceshallbeequippedwithwasteheatrecyclingfacilitywithfurnaceinternal

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smokeexhaustingfunction.

4.7.9Themeltingslagandthemetalwasteofflamecuttingmachineandflamescarfingmachineofcontinuouscastingshallbesentintosteelmakingandironmakingtocomprehensivelyuse.

4.8Steelrollingandmetalproducts

4.8.1Thehotchargingandhotdeliverytechnologyofthecontinuouscastingbiletshallbeadoptedfornewsection,wire,andthinslabrollingproductionline,andthehotchargerateandhotchargetemperatureshallbeincreased.Thehotchargingandhotdeliverytechnologyofthelcontinuouscastingbilletshallbeadoptedforthenewmedium-thicknesssheetproductionline.

4.8.2Therecyclingandutilizationdeviceoffluegaswasteheatofrollingreheatingfurnaceshallbearrangedaccordingtotherelatedrequirementsofcurrentnationalstandard,e.g.GB50486CodeforDesignofIndustrialFurnacesinIronandSteelWorks.

4.8.3Therollingcoolingwatershallberecycledaftertreated.

4.8.4Thewasteacidproducedinthepicklingofrollingandmetalproductsshallberecycledandregeneratedorcomprehensivelyutilized.

4.8.5Thelargeandmediumrollingenterpriseshallbeequippedwithoilcleaningfacility,andtheimpuritiesinoilshallberemovedonline,soastoreducetheproductionamountofwasteoil.Fortheproducedwasteoil,itshallbefirstlyusedbyself,andtheremainingwasteoilshallbedisposedaccordingtotherelatedrequirementsofhazardouswastemanagementmethod.

4.8.6Therollingturbidcirculatinghorizontalflowtankandoildepotwatersuctionwellshallbeequippedwithfloatingoilrecyclingmachines.

4.8.7Thecropendsandwastesproducedintherollingshallberecycled,andsenttothesteelmakingtoutilize.

4.8.8Thefurnaceslagofreheatingfurnace,meltingslagofflamescarfingmachineandflamecuttingmachine,andsawingchipshallbesentintothesteelmakingandironmakingproductionlinestocomprehensivelyutilize.

4.8.9Thedustandiron-containingdustsludgeshallbecomprehensivelyutilized.

4.8.10Thescaleshallbeusedfortheproductionofferrosiliconalloy,productionofreductionironpowder,andcomprehensiveutilizationofchemicalengineeringindustryinahigh-addedvalueway.

4.8.11Theironoxidepowderproducedintheacidregenerationprocessshallbesenttootherindustriestocomprehensivelyutilizeafterrecycled.Thehigh-qualityironoxideredproductshallbedeeplyprocessed.

4.8.12Thezincdustandzincslagproducedinthehotgalvanizingproductionprocessshallberecycledtoextractthezinc.

4.8.13Thecoolingwaterofwirewithdrawalmachineshallberecycledafterfirstlycooled.Thecoolingblowdownwatercanbeusedforflushingsteelwiresinpicklingprocedure.

4.8.14Theferroussulfateandzincsulfate-containingwastewatershallberecycledafterneutralizedandcoagulatedforcoolingthewirewithdrawalmachineandtheflushingofsteelwires.

4.8.15Partorallofhigh-pressureflushingwaterofpicklingworkshopandsteelwireflushingwaterofcontinuousunitshallberecycledforpre-cleaningorpre-flushingthesteelwires.

4.8.16Theproducedphosphatedslaginthephosphatationprocessofsteelwiresshallberecycled.

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4.9Metallurgicallimeandrefractorymaterial

4.9.1Therawlimestonematerialshallberespectivelycalcinedaccordingtotheparticlesizeandproperty,andthefineparticlescanbeusedforsteelmaking,sinteringorotherindustries.

4.9.2Thewashingwaterofrawlimestonematerialshallberecycledaftertreated.Themeasuresshallbetakentocomprehensivelyutilizesludge.

4.9.3Thefine-particlelimestonecanbepressedintoballsforsteelmakingorpreparedintofinepowdersasdesulfurizers,andcanalsobesinteredorutilizedbyotherindustries.

4.9.4Thecollectedlimestonepowderineachproductionstepshallbemixedintothefine-particlelimestone,andthelimepowdershallbemixedintofine-particlelime.

4.9.5Whenthelimeiscalcinedinthemetallurgicallimekiln,thegaswithlowcalorificvalueshallbeused.

4.9.6Thetailgasproducedbythemetallurgicallimekilnshallbecomprehensivelyutilized.

4.9.7Thewasteheatoftailgasproducedbytherefractorymaterialkilnshallberecycled.

4.9.8Whenthemetallurgicallimeandrefractorymaterialenterprisebuildsnewkilnorrebuiltthekiln,theenergy-savingandenvironment-friendlyunshapedrefractorymaterialshallbepreferablyused.

4.9.9Thefinepowderanddustcollectedinthecalciningprocessofmagnesiumsandanddolomitebygasorliquidfuelshallberecycled,andcanbepressedintoballsforsteelmaking.

4.9.10Thewastebilletsintheproduetionprocessofrefractoryproductsshallbereturnedbackintomeltingprocedureaccordingtoratio.

4.9.11Thewastebrickintherefractoryproductproductionprocessandthereplacedanddetachedrefractorymaterialsofmetallurgicalkilnshallberecycledforunshapedrefractory