钢铁工业环境保护设计规范（英文版）

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Foreword

ThiscodeismodifiedbyCapitalEngineering&.ResearchIncorporationLimited(CERI)inconjunctionwithotherrelevantorganizationsaccordingtotherequirementsofDocumentJIANBIAO[2013]No.169issuedbytheMinistryofHousingandUrban-RuralDevelopment(MOHURD)ofthePeople'sRepublicofChina—"NoticeonPrintingandDistributing'theDevelopmentandRevisionPlanofNationalEngineeringConstructionStandardsin2014'".

Thecodeconsistsof6chaptersand1appendix,covering:generalprovisions,terms,basicrequirements,siteselectionandgenerallayout,designofenvironmentalprotectioninprocedures,anddivisionofenvironmentalprotectionfacilities.

Maincontentofthismodificationincludes:

1.Accordingtothenewlyenactedrelatedlaws,regulations,policiesandstandardspromulgatedbythestate,thebasicrequirements,factorysiteselectionandgenerallayout,andtherelatedcontentsofenvironmentalprotectionineachprocedureofironandsteelindustryofGB50406-2007CodeforDesignofEnvironmentalProtectionofIrowandSteelIndustry(hereinafterreferredtoasoriginalcode)isrevisedandrefined.

2.Theironandsteelindustryhaslownedthecompletecleanproductionindexevaluationsystemandresourcecomprehensiveutilizationcode;therefore,thecontentwhichbelongstothecleanproductiontechnologyorcomprehensiveufilizationtechnologybutisnotdirectlyrelatedwithenvironmentalprotectionfacilityintheoriginalcodewillbeproperlydeleted.Aftertherevisionofthiscode,thedesigncontentofcontrolontheterminalofeachprocedureofironandsteelindustryishighlighted.

Theprovisionsprintedinboldtypeinthiscodearemandatoryonesandmustbeimplementedstrictly.

TheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaisinchargeoftheadministrationofthiscodeandtheexplanationofthecompulsoryprovisions.ChinaMetallurgicalConstructionAssociationtakesresponsibilityforroutinemanagement,andCERIisresponsibleforexplainingspecifictechnicaldetails.Allrelevantorganizationsarekindlyrequestedtosumupexperiencesandaccumulatedataduringtheprocessofimplementingthiscode.Ifanyamendmentandadditionisfoundnecessary,pleasemailyourcommentsandsuggestionstothecodeadministrationofficeofCERI(address:No.7Jiananjie,BeijingEconomic&.TechnicalDevelopmentArea;Postcode:100176).

ChiefDevelopmentOrganization,Co-DevelopmentOrganizations,ChiefDraftersandChiefReviewersofthiscode.

ChiefDevelopmentOrganization:

CapitalEngineering&.ResearchIncorporationLtd.

Co-DevelopmentOrganizations:

ZhongyeChangtianInternationalEngineeringCo.,Ltd.

CISDIEngineeringCo.,Ltd.

NorthernEngineering&.TechnologyCorporationMCC

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ACRECoking&.RefractoryEngineeringConsultingCorporation,MCC

BaoshanIron&.SteelCo.,Ltd.

WISDRIEngineering&.ResearchIncorporationLtd.

ShandongIron&.SteelGroupCompanyLtd.

BERISEngineeringandResearchCorporation

ChiefDrafters:

YANGXiaodongJIANGDewangJIANGQiZHANGLeiZHOUYulianWANGDongZHENGSuixuWUJianCHENJianLIUJianping

ZHUHuilingRENHaixiaLIANGKailiWANGShushengXIAKebin

ChiefReviewers:

GUOQijiaoHUANGDaoLIYouhuNIUJingkaoZHENGWenhuaCANGDaqiangZHANGQixuanLUZhongfeiWANGLiying

GUOJuncaiLVJie

Contents

1Generalprovisions (1)

2Terms (2)

3Basicrequirements (3)

4Siteselectionandgenerallayout (5)

4.1Selectionoffactorysite (5)

4.2Generallayout (5)

5Designofenvironmentalprotectioninprocedures (7)

5.1Oremining (7)

5.2Oredressing (8)

5.3Stockyard (8)

5.4Sinteringandpelletizing (9)

5.5Coking (10)

5.6Ironmaking (13)

5.7Steelmakingandcontinuouscasting (14)

5.8Steelrolingandmetalproducts (16)

5.9Metallurgicallimeandrefractorymaterial (17)

5.10Ferroalloy (18)

5.11Carbon (19)

5.12Publicandauxiliaryfacilhities (20)

5.13Centralizedenvironmentalprotectionfacilities (23)

6Divisionofenvironmentalprotectionfacilities (24)

AppendixAContentsofenvironmentalprotectionfacilitiesineachproduction

procedureofironandsteelenterprise (25)

Explanationofwordinginthiscode (30)

Listofquotedstandards (31)

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1Generalprovisions

1.0.1Thecodeisestablishedinordertoimprovetheenvironmentalprotectiondesignleveloftheironandsteelindustryconstructionproject,fullyimplementtheEnvironmentalProtectionLawofthePeople'sRepublicofChinaandtherelatedlaws,regulationsandpoliciesonpollutionpreventionofironandsteelindustry,developmentpoliciesofironandsteelindustryandthelike,andprotectandimprovetheenvironmentquality.

1.0.2Thecodeisapplicabletotheenvironmentalprotectiondesignofconstructionprojectofironandsteelindustry.ironandsteelindustryincludesironore,manganeseore,chromiumoremininganddressing,sintering,pelletizing,coking,ironmaking,steelmaking,rolling,ferroalloy,carbon,refractory

material,metalproductandotherauxiliaryprocesses.Theenvironmentalprotectionofironandsteelindustrycoverstheenvironmentalprotectiondesignonexhaustgas,wastewater,noiseandsolidwastesproducedintheproductionprocessofironandsteelindustry,requirementsonselectionoffactorysiteandgenerallayout,anddivisionofenvironmentalprotectionfacilities.

1.0.3Theenvironmentalprotectiondesignoftheironandsteelindustryconstructionproject,inadditiontocomplyingwiththiscode,shallalsomeettherelatedrequirementsofcurrentnationalstandards.

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2Terms

2.0.1Fluegascleaningofsinteringandpelletizing

Controlthefluegascontainingpollutantsofparticles,sulfurdioxide,oxynitrideNO,fluorideanddioxinproducedinthesinteringandpelletizingproductionprocessofironorepowder.

2.0.2Dedustingofblastfurnacecastinghouse

ControltheparticlesproducedinBFcastinghouse,mainlyincludingtaphole,mainchannel,slagrunner,slagskimmer,tiltingrunner,etc.

2.0.3FluegascleaningofEAFsmelting

Controlthepollutantfluegascontainingparticlesanddioxinproducedinthemelting,oxidativedecarbonizingandreductionsmeltingprocessofEAF

2.0.4Dedustingofprimaryfluegasofconverter

Controltheparticlesinfluegas(includingrecyclinggasandbleedinggas)producedintheoxygenblowingsmeltingprocessofconverter.

2.0.5NewOGmethodforprimaryfluegascleaningofconverter

Adoptthewettypecleaningmethodofspraytowerandannulargapdeviceanddewateringtowerontheparticlesintheprimaryfluegasofconverter.

2.0.6Dedustingofsecondaryfluegasofconverter

Controlthedust-containingfluegasproducedinthehotmetalmixing,charging,slagdischarging,andtappingprocessesofconverter,exceptprimaryfluegas.

2.0.7Utilizationofrecycledwater

Theusedwaterinadefinedproductionsystemeitherdirectlyorafterpropertreatment,isreusedinthesameproductionprocess.

2.0.8Cascadeutilizationofwater

Accordingtoeachprocedure,eachworkshopordifferentrequirementsonwaterqualitywithindifferentscopesintheproductionprocess,thewaterisorderlyusedincascadefromhightolowaccordingtothewaterqualityrequirements.

2.0.9Directcoolingwater

Coolingwaterwhichisindirectcontactwithcooledequipmentormedium.

2.0.10Recycleutilizationrateofwater

Theratioofrepeatedutilizationamounttototalutilizationamountinthewholeproductionprocessofenterprisewithinthecertainmeteringtime.

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3Basicrequirements

3.0.1Thedesigndocumentofconstructionprojectshallcoverthedesigncontentofenvironmentalprotection.

3.0.2Theenvironmentalprotectiondesigncontentoftheconstructionprojectshallbeperformed,constructedandrunningwithmainworkssimultaneously.

3.0.3Theenvironmentalprotectiondesignofconstructionprojectofironandsteelindustryshallstrictlycontrolthetotalemissionamountofpollutantstoensurethattheemissionofpollutantsmeetthestandards.

3.0.4Thedesignofexhaustgas,wastewater,solidwasteandnoiseenvironmentalprotectioncontrolfacilitiesandtheecologicalprotectionintheconstructionprojectofironandsteelindustryshallmeetthefollowingrequirements:

1Matureexhaustgaspollutanttechnologyshallbeadoptedforthepreventionandcontroltechnologyofcleaning;forthegascleaning,drytypecleaningtechnologyshallbereplacedbywettypecleaningtechnology.Wastegaspollutionpreventionandcontrolrequirementsshallbeestablishedinthekeycontrolareasforairpollutioncontroldesignatedbythenation.Aftercleaning,theexhaustgaspollutantineachprocedureshallmeettherequirementsofthenationandlocalironandsteelindustryandrelatedexhaustgaspoHutantemissionstandards.

2Accordingtotheprincipleofwatersupplyanduftilizationbydifferentgradeanddifferentquality,cleanwaterandsewagedivision,recycledutilizationofwater,cascadeutilizationofwater,andothertechnologiesareadoptedtoimprovethe_repeatedutilizationrateofproducedwaterineachprocedure;useurbanrecycledwateraspartofthewatersupplysourcetoreducetheamountofwaterextractedperunit'ofproductandtheamountofdischargedwastewater.Itisstrictlyforbiddentodischargecokingphenol-cyanogenwastewaterandcold-rollingheavymetal-containingwastewaterintotheenvironment.Aftercleaning,thewastewaterpollutantineachprocedureshallmeettherequirementsofnationandlocalironandsteelindustryandrelatedwastewaterpollutantemissionstandards.

3Thesolidwastesshallbetreatedbycomprehensiveutilizationorsafetydisposal.Thestorageanddisposalofsolidwastesshallmeettherequirementsofcurrentnationalstandards,e.g.GB18599StandardforPollutionControlontheStorageandDisposalSiteforGeneralIndustrial

SolidWastes,GB18597StandardforPollutionControlonHazardousWasteStorage,andGB18598StandardforPollutionControlontheSecurityLandfillSiteforHazardousWastes.

4Low-noiseproductionprocessandequipmentshallbeselectedandnoisesourceshallbecontrolled.Afterthenoisesourcesarecontrolledbymeasures,thefactoryboundaryshallmeettherequirementsofnationandlocalironandsteelindustryandrelatedenvironmentnoiseemissionstandardsoffactoryboundary.

5Intheconstruction,runningandclosingprocessoforeminingandoredressingofmetalminesofironandsteelindustry,theecologicalenvironmentalprotectionshallbeenhanced,andtheecologicalenvironmentalprotectionshallbewellplannedandimplemented.

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3.0.5Theautomaticmonitoringdesignonexhaustgas,wastewaterandthelikeoftheconstructionprojectofironandsteelindustryshallmeettherelatedcurrentnationaltechnicalrequirements.

3.0.6Forimportedprojects,thepollutantemissionofequipmentanddevicesshallmeettherelatedrequirementsofthecurrentnationalpollutantemissionstandards.

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4Siteselectionandgenerallayout

4.1Selectionoffactorysite

4.1.1ThefactorysiteofconstructionprojectmustcomplywiththerelatedlawsandregulationsoftheP.R.CEnvironmentalProtectionLaw.Itisstrictlyforbiddentoselectsitesinlandscapeareasandnaturereserveareasdesignatedbythenationandlocalgovernments.

4.1.2Thefactorysiteshallbeselectedinaccordancewiththerequirementsofnationalandlocalmainfunctionareaplan,environmentalprotectionplan,urbanoverallplan,environmentfunctionareaplanandotherrelatedplans.Thefactorysiteofnewprojectshallnotbeselectedinurbanbuilt-upareas,municipaldistrictsofprefecture-levelandabovecities.

4.1.3Thefactorysiteofprojectshallnotbeselectedinthefollowinglocations:

1Primaryconservationareasandsecondaryconservationareasofsurfacewaterandundergroundwaterdrinkingwatersources.

2Nationalorlocalspecialwaterresourceprotectionareas(hotwater,mineralwaterandthermalspringwater),supplementingareasandrunoffareas.

4.1.4Thesiteofcokingplantofironandsteelindustryshallnotbelocatedatbothbanksofmainrivers,bothsidesofhighways,andwithinonemileoffoodandmedicineenterpriseswithstrictpollutioncontrolrequirements.

4.1.5Theselectionofspecialrailwaysandhighwaysforconstructionprojectsshallminimizethedamageandpollutionofthenaturalecologicalenvironmentsalongtheroutes.

4.1.6Theconstructionprojectthatemitpollutantsintotheatmosphericenvironmentshallnotbebuiltinrivervalleyswhereatmosphericpollutantsaredifficulttodiffused,basins,andareaswithhighstaticwindfrequencies.

4.1.7Theconstructionprojectwithinfluenceonqualityofambientairshallbebuiltatthedownwindsidewithannualmaximum-frequencywinddirectiontoenvironment-sensitiveprotectiongoals,e.g.livingresidentialareas,hospitalsandschools,andshallkeepspecifiedsanitaryprotectiondistancefromlivingresidentialareas.

4.1.8Theadministrativemanagementfacilitiesandlivingfacilitiesoftheconstructionprojectshallbesetatonesidenearthelivingresidentialareasandserveasthenon-extensionendoftheconstructionproject.

4.1.9Thehigh-noiseproductionfacilitiesoftheconstructionprojectshallbecentrallyarrangedintheplacesawayfrompersonconcentrationareasandwithquietrequirements;theanti-noisedistancebetweenthehigh-noiseproductionfacilitiesandtheiradjacentworkplacesshallmeetthecurrentnationalnoiseandsanitaryprotectiondistancestandards.

4.2Generallayout

4.2.1Atthepremisesofreachingconditionsofreasonableproductionprocessandsmoothmaterialtransportation,thegenerallayoutofconstructionprojectshallarrangethefacilitieswithhigherpollutionhazardonthedownwindsidewithannualmaximum-frequencywinddirection,andawayfromtheareas

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withhigherenvironmentqualityrequirements.Forthedeterminationofotherfacilitieswithpollutioninfluence,themutualinfluenceandthepollutantstackingshallbeminimized.Thelocationshallbereservedfortheenvironmentalprotectionfacilitieswhicharetemporarysuspendedduetotechnicalproblems.

4.2.2Thecoalstorageyardandthecokestorageyardshallbearrangedtogetherwiththecomprehensivestockyardofironandsteelplant.Whentheyareseparatelyarranged,theyshallbelocatedontheupwindsidewithannualminimum-frequencywinddirectioninthecokingarea.

4.2.3Thesteelslagtreatmentfacilitiesofthesteelmakingworkshopshallbelocatedontheupwindsidewithannualminimum-frequencywinddirectioninthesteelmakingmainplant.

4.2.4Theproductionmanagementareashallbelocatedatthedownwindsidewithannualminimum-frequencywinddirectionintheplant,andshallbeorientedtothecityorlargerresidentialareas.

4.2.5Thefactorysiteofconstructionprojectofironandsteelindustryshallbeselectedinaccordancewiththerelatedrequirementsofthecurrentnationalstandard,e.g.GB50603CodeforDesignofGeneralLayoutandTransportationforIronandSteelEnterprise.

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5Designofenvironmentalprotectioninprocedures

5.1Oremining

5.1.1Thedustsuppressionmeasuresandtheairventilatinganddedustingmeasures(wetrockdrilling,watersprinklingandmistspraying)shallbetakenintheproductionproceduresofdrilling(rockdrilling),blasting,shovelingandtransportationintheoreminingprocess.Thedrydusttrappingmeasurescanbetakenforthedrillingoperationinwater-lackareasorhillsideexposedmines.

5.1.2Thespecialwatersprinklingtrucksshallbearrangedinthemines,andbeusedforsprayingwatertoroadstosuppressdustatfixedtime.Theorerockscatteringpreventingmeasureshallbetakeninthetrucktransportationprocess.

5.1.3Theeffectivededustingmeasuresshallbetakeningroundcrushingstationsandundergroundcrushingchambers.Thehigh-efficiencydrytypededustershallbeadoptedforthededustingequipment.

5.1.4Theindustrialsitesofmainwellandauxiliarywellsofundergroundminesandthemouthofairreturnwellshallbekeptawayfromresidentialareas.Whentheconditionsarelimited,theycanbelocatedatthedownwindsidewithannualmaximum-frequencywinddirectionintheresidentialarea.

5.1.5Whenthefueloilpoweredequipmentisusedintheminingprocess,thetailgascleaningdeviceshallbeinstalled.

5.1.6Thewastedumpshall/fullyutilizethewastelandsofhillsidesandvalleys,andminimizetheoccupationoftillagelandsandforestlands.Thesiteofwastedumpshallbeselectedinaccordancewiththerelatedrequirementsofthecurrentnationalstandard,e.g.GB51119CodeforWasteDumpDesignofMetalMine.Thewatersprinklingorotherdustsuppressionmeasuresshallbetakenforthedumpingareasandotherdustproducingpoints.

5.1.7Thewater'inexposedminingpits,andoverflownwaterinundergroundminewellsshallbecollectedanddrainedintowaterstoragetanks,waterstoragepondsandotherwaterstoragefacilities.Aftertreating,theyshallberecycled,orbedrainedafterreachingstandards.

5.1.8Theleachingwaterinwastedump,andtheheavymetalorotherharmfulmineral-containingminewastewatershallbecleaned,andthenberecycled,orbedrainedafterreachingstandards.

5.1.9Thecompletewatercutoffanddrainagesystemsandthebarrierprotectionfacilitiesforpreventionandcontrollingwaterandsoillossshallbeinstalledintheminingyards,wastedumpsandmineroads.

5.1.10Thestabilizingtreatmentfacilitiesshallbetakenfortheexposedminingyardandwastedump;thepreventingandmonitoringfacilitiesshallbeinstalled.Forthegoafwithpossiblecollapsinghazards,thepreventingandmonitoringfacilitiesshallbetakenontheground.

5.1.11Forthemineswithdestroyedlands,thelandsshallbereclaimedinaccordancewiththerelevantprovisionsofthelandreclamationregulationsandtheirimplementationmethods.

5.1.12Thepoisonlesswasterocksofminesmaybeusedasthefillingorbuildingmaterialsfortheexposedminingpits,undergroundgoafs,andminedcollapsingpits.Thewasterockscontainingpoisonousmattersorradioactivemattersshallbedisposedorutilizedaccordingtotherelatedtechnicalrequirements.

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5.1.13Thepropersilencing,damping,noisereductionandotherdenoisingmeasuresshallbetakenfortheperforatingmachines,rockdrillingmachines,aircompressors,airventilatorsandotherhigh-noiseequipment.

5.2Oredressing

5.2.1Thepollutionpreventionandcontroloforedressingshallbedesignedaccordingtothetype,quantity,concentrationandemissionmethodofpollutantsintheoredressingtestreportandotherpollutionpreventionandcontrolplans.

5.2.2Whentheoredressingprocessisdesigned,thetransferfrequencyofmaterialshallbereduced,andthefalldifferenceoftransfershallbereduced;thepowerlessdusttrappingdevicemaybeadoptedatthetransferpointofrubberbelt.Thededustingsystemsshallbeinstalledatthedustproducingpointsofproceduresorfacilities,e.g.oretransportation,transfer,orewarehouse,crushingandscreening;thebagtypededusterorelectrostaticprecipitatorshallbeused;thesprayingdust-suppressiondeviceshallbeinstalledatthedustproducingpointswhichcannotbesealedandhavesmallamountofdust.

5.2.3Thehigh-efficiencyfluegascleaningfacilitiesshallbeequippedfortherotarykilnandshaftkilnformagnetizedroasting.

5.2.4Theairventilatinganddedustingmeasuresshallbetakenfortheundergroundoperationspacesoforegrindingandsortingplants,laboratoryandgroundorebin.

5.2.5Thepoisonless,non-corrosiveorlow-poisonandlow-corrosionflotationagentsshallbeselectedfortheflotationoperation.Whenthehigh-alkalinityandhigh-acidityflotationoperationisselected,thewastewatershallberecycledafterneutralized.

5.2.6Theoredressingplantshallbeequippedwithperfectcireulatingwatersystem.Theproductionwastewater(returnwaterofconcentratefiltering,overflownwateroftailingconcentrationtank,coolingwaterofequipment,floorwaterofplantflushingandthelike)andtheclarifiedwateroftailingwarehouseshallbesentintothecirculatingwatersystemtorecycle.

5.2.7Theoredressingplantshallbeequippedwithemergencypondtocollecttheslurrywhichisdischargedundertheemergencycondition.

5.2.8Thetailingslurryshallbeconveyedafterconcentratedathighconcentration;thewearingresistantpipesshallbeusedfortheconveyingsystem,preferablydoublewearingresistantpipes.

5.2.9Thewastetailingsproducedintheoredressingprocessshallbeproperlytreatedwithoutarbitratedischarge.

5.2.10Thesiteselectionandclosingoftailingwarehouseandtheenvironmentalprotectionmeasuresoftailingfacilitiesshallmeettherelatedrequirementsofcurrentnationalstandard,e.g.GB50863CodeforDesignofTailingsFacilities.

5.2.11Thenon-metallicscreennets,springdampers,andotherdenoisingmeasuresshallbeusedforthevibrationscreenofcrushingandscreeningsystem.Thelocalsealingmeasuresshallbetakenforthevibrationscreenandballgrinder.Theundergroundorebinshallbeequippedwithlow-noisefeedinganddischargeequipment.

5.3Stockyard

5.3.1Theraisingdustpreventingmeasuresshallbetakenforthestockyard.Forthestockyardwithinthekeycontrolarea,andthestockyardoutsidekeycontrolareabutwithincityplanningarea,the

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closedtypematerialstorageprocessshallbeadoptedforbulkmaterials.Forthestockyardoutsidekeycontrolareaandcityplanningarea,thedustproofnet,watersprayingorsurfacecoveringagentsprayingandotherpollutionpreventionandcontrolmeasuresshallbetaken.

5.3.2Thebulkmaterialsshallbeconveyedbytheautomaticcontinuousconveyingfacilities;thematerialstackingandreclaimingdeviceshallbeequippedwithsprayingdustsuppressiondevice.

5.3.3Forthestockyardwithinkeycontrolarea,therubberconveyorshallbeequippedwithenclosedcorridorortakeothersealedtransportationtypes;therubberconveyorsinotherareasshallbeequippedwithbeltcovers.Thesealingmeasuresshallbetakenfortheproducingdustpointsinthetransfer,dischargeandreceivingprocessofbeltconveyor,andbeequippedwithdedustingordustsuppressionfacilities.Thesealingmeasuresshallbetakenforthedustproducingpointsofcrushingandscreeningfacilities,andbeequippedwithdedustingfacilities.

5.3.4Thesealingmeasuresshallbetakenforthetraindumpersandtruckreceivingtrough,andbeequippedwithdedustingfacilitiesorhigh-efficiencysprayingdustsuppressiondevices.

5.3.5Thesealingdevicesshallbeinstalledinthedustdischarge,conveyingandstorageprocessofdeduster;whenthedustisconveyedinlongdistance,thesealedconveyingtypeshallbeadoptedforthepneumaticconveyingtypeorclosedtypetankcar,withoutsecondarypollution.

5.3.6Thecarservicerackshallbesetatanexitofstockyard.

5.3.7Therainwaterdrainagesystemofstockyardshallbeequippedwithprecipitatingtank;theprecipitatedrainwatershallberecycled.Theflushingwatershallbecollectedandtreated,andthenrecycled.

5.3.8Thedustandwatertreatmentsludgecollectedbydedustingfacilityshallberecycled,withoutsecondarypollution.

5.3.9Thesileneing,sound/isolation,dampingandothernoisecontrolmeasuresshallbetakenforthecrushingandscreeningequipment,fansandotherhigh-noisesources.Theequipmentlayerswithtransferstations,crushingandscreeningstationsandotherhigh-noisenoisesshallbesealed.

5.4Sinteringandpelletizing

5.4.1Thefollowingrequirementsshallbemetinthematerialconveyingprocess:

1Thematerialtransferfrequencyshallbereducedintheconveyingprocess,andthefalldifferenceshallbereduced.

2Whenthematerialwhichiseasytoproduceraisedustisconveyed,thehumidifyingmeasureshallbetaken,ortheclosedtypeconveyingprocessisimplemented.

3Theproducingdustpointshallbeequippedwiththededustingsystemwithclosedtypeairsuction,andthehigh-efficiencydedustershallbeselected.

4Whenthematerialsareloadedandunloadedbytrains,trucksandotheropentypetransportationequipment,thedustpreventingandsuppressionmeasuresshallbetaken.

5.4.2Intheproportioningprocess,thematerialwhichiseasytoproduceraisedustshallbecentrallyarranged,andtheapplicableisolationanddustsuppressionmeasuresshallbetaken.

5.4.3Thefluegascirculatingtechnologyshallbetakenforthesintering,soastoreducetheamountofsinteringfluegaswhichisexhaustedintoatmosphere.Thematerialdischargeendsofsinteringmachines,belttyperoastingmachines,andbelttypecoolingmachinesshallbeequippedwithlarge-capacitysealinghoods;beforethedust-containingexhaustgasisexhausted,thehigh-efficiency

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dedustersshallbeusedforcleaning.Atthesametime,thehigh-efficiencysealingtechnologiesshallbeadoptedtopreventthedustofthecoolingmachinefromescaping.

5.4.4Theroastingfluegasproducedintheproductionprocessshallbecleanedviadedustinganddesulfurization.

5.4.5Whenthecontentofotherpollutants(nitrogenoxides,fluorides,leadanditscompounds,dioxins,etc.)whichareprohibitedfrombeingexhaustedinthefluegasduringtheproductionprocesscannotmeettheenvironmentalprotectionrequirements,the