简介：ThepaperwillgiveanoverviewabouttheCOREX?plantsinoperation,showthenewdevelopmentsandfindingsfortheCOREX?processi.e.arealgasdistributionandcoalbriquettingandthestatusoftheFINEX?technologywillbegiven.

简介：Baosteel'ssteelmakinghasdevelopedgreatlyoverthelast30yearsintheareasofhotmetalpretreatment,converter,electricarcfurnace(EAF),secondaryrefining,continuouscasting,stainlesssteelandthecomprehensiveutilizationofresources.Thedevelopmentoftechnologies,suchascleansteelproduction,ruhrstahlheraeus(RH)vacuumrefining,abreakoutpredictionsystemforslabcontinuouscastingandrotarycylinderslagtreatmenthascreatedagoodenvironmentforthedevelopmentofvalue-addedproductsandthecomprehensiveutilizationofresourcesatBaosteel.ThispaperdescribesthedirectionofdevelopmentofBaosteel'ssteelmakinginthefuture.

简介：OxidemetallurgytechnologyhasbeendevelopedatBaosteelforimprovingtheheataffectedzonetoughnessofsteelplatesforhighheatinputwelding.AfterdeoxidationwithstrongdeoxidizersofMgalloy,thecomplexinclusionscontainingpartsofcompoundsofMgO,Ti2O3,MnO,Al2O3,MnS,CaSandTiNareformed.Thesekindsofinclusionsarebeneficialforpromotingtheformationofintragranularferrite.Aftertwo-electrodevibratoryelectrogasarcweldingwiththeV-typegrooveandahighheatinputof395kJ/cminasinglepass,theformeraustenitegrainisveryfineinsize,withanaveragegrainsizeofonly85μm.Excellentheataffectedzonetoughnessisobtainedforthedevelopedsteelplateswithathicknessupto68mm.

简介：Baosteel’shigh-frequencyelectricresistancewelded(HFW)610longitudinalseammill(85/8″-24″,theyearlyoutput300000t)andUOE1422longitudinalsubmergedarcwelding(SAW)mill(20'-56',theyearlyoutput500000t)areestablishedin2005and2008,respectively.ProductspecificationcoverswholeofAPI5CTstandardandmostofAPI5Lstandard,terminatingthehistoryofmanufacturingthemediumandlargesizepipesatBaosteel.Theyearlyoutputincreasedfrom1,200000ttonearly2000000t.HFW610millisorientedatmidsizepipes,whicharemainlylinepipeandweldedcasing.ThedesignedyearlyoutputofHFWmillis300000t,includingcasingof90000t,linepipeof180000t,roundstructuralpipeof15000tandrectanglestructuralpipeof15000t.Theyearlyoutputofoilcasinglinesupportingtheweldinglineis120000t,amongwhichincludingweldedcasingandseamlesscasingof30000t.Baosteel’sHFW610longitudinalseammillwasestablishedonOctober27,2005.AftertheequipmenttrialrunInOctober,2005-March,2006andequipmentfunctionexaminationInApril,2006-June,2006,massproductionstartedinJuly2006.AndinDecember2006,monthlydesignedcapacitywasachieved,reachingto30496.644tinweldingpipeand28349.939tinfinishedpipe.Theoutputof2006,2007,2008and2009was117067t,223554t,255791t,and204424t,withthecomprehensiveyieldratio79.4%,87.8%,90.80%and91.92%respectively.ThisstudyintroducesBaosteelHFW610Millwhichistheworldclass,energyconservationandenvironmentalprotectionenterprise,includingproductorientation,processandnewproductdevelopment.

简介：Ferriticstainlesssteel(FSS)forvariousapplicationswasdevelopedonthebasisofThermo-calcsimulation.Alloydesign,precipitateanalysisandprocessingparametersoptimizationwerecarriedoutonthebasisofthesimulationresultsaccordingtothetechnicalrequirementsoftheapplications.Thesedevelopedproductshaveoutstandingproperties,suchasmechanicalstrength,ductility,formability,weldabilityandcorrosionresistance.BaosteelhasformedaseriesofFSSproductswhichwillincreasetheprofitofthecompanyandenhancetheproductvarietyofstainlesssteel.

简介：DSShavehighstrength,highcorrosionresistanceandgoodweldingproperties.Comparingwiththesamecorrosionresistancelevelausteniticstainlesssteel,DSSdecreaselargelyNicontentandrealizethethinningofthicknessdesigntoperfectlyoptimizepropertiesanddecreasecosts.NowDSShavebeenwidelyusedinmanyfieldssuchaspetroleum,chemicalindustry,paperproduction,shipbuilding,nuclearpower,seawaterdesalting,vacuumsaltproductionandarchitecture.TiscohavebegantheprocessdevelopmentandproductapplicationresearchofDSSproductsfromlastcenturyandgraduallysolvedalotoftechnicalproblemssuchasAODnitrogenalloyingcontrolofvariouscontentDSS,hightemperaturedeformationmechanismofthermalprocess,largedeformationhotrollingprocessofcoils,theeffectofbadphaseprecipitatedduringhottreatmentprocessonpropertiesandhighefficiencypicklingofhighCr/MocontentDSSplates.ThevariousalloycontentDSSplatesandwidecoldrollingcoils(3Re60,S32101,S32304,S31803,S32205,S32750andSUS329J4L)weresuccessfullydevelopedandusedinnationalimportantconstructions,keyindustriesandabroadprojects.

简介：Throughout30yearsofimportation,adoptionandinnovation,theColdRollingPlantofBaosteelhasadheredtoamarket-orientedstrategy,andgraduallyexpandeditsoutputandraiseditstechnicallevelthroughtheexpansionofproductionscale,theoptimizationofproductionlines,thedevelopmentofhighaddedvalueproducts,theimprovementofproductquality,environmentallyfriendlymanufacturingandtechnologicalinnovation.Inthisway,theplanthasdevelopedintoaworldclasscoldrollingplantthatproducescutting-edgeeconomicandtechnicalindices.

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简介：DuetofastdevelopmentofChinesesteelindustry,continuousadjustmentofproduct,improvementofquality,researchofvalue-addedproduct,RHtechnologyissignificantlydeveloped.MoreandmoresteelplantsarecoveredwithRHfacilities.RHratioisgrowingrapidlyaswell.Overpastdecade,throughassimilatingadvancedforeigntechnologiesandfurtherrefiningthem,ChineselargescalesteelplantsmasterthetechnologyofRHproduction,operation,maintenanceandmakeitmorewidespread.RHfunctionsarewellappliedandimproved.RHismorewidelyeffectivelyputintouse.Throughindependentinnovation,RHcoredevicesandtechnology,suchasRHvacuumpump,oxygentoplance,vacuumvesselpreheatinglance,ladleliftingdeviceetc.haverealizedlocalization.Thedevelopmentofequipmentdesign,softwaredesign,equipmentmanufacturingtechnology,equipmentmounting,testtechnologyandEPCmanagementmakesequipmentconfigurationmoreflexible,equipmentmorefunctionalandstable,easiertooperateandmaintain.Italsoguaranteeshighlyeffectiveandlowenergyconsumptionproductionandqualityofsteel,reachesinternationaladvancedlevel,lowersthecostofRHconstructionandoperation,makesafter-sakeservicemoreconvenient.HowtocontinuouslyoptimizeanddevelopRHprocess,equipmentandcontroltechnology,inordertomeettheneedsofproductwithmorereasonableandeconomicprocess,exploitpotentialities,buildmoreeffective,lowercost,lowerenergyconsumption,protectingenvironmentRHfacilitieswillbethekeypointoffutureRHtechnologydevelopmentinChina.

简介：ThesteelslagatBaosteelmainlycomesfrombasicoxygenfurnaces(BOF),electricarcfurnaces(EAF),continuouscastingandhotmetalpretreatment.TheoutputofthesteelslagatBaosteelwas4.43Mtin2010.Thesteelslagwasutilizedbothwithinthecompanyandacrossthesociety,andtheutilizationratewithinthecompanyachievedwas16%.Thisstudydescribesthecurrentstatusandexistingproblemsinthosetechnologiesoftreatingandusingsteelslag,intheaspectsofprimarytreatment,secondarytreatmentandadvancedtreatment,anditpointsoutthedevelopment'sdirection.

简介：ByanalyzingrecentdevelopmentofreheatingfurnaceinShougang,thedirectionofrollingreheatingfurnaceislargetype,highefficiency,lowerpollutionandautomationetc.Manyadvancedtechnologiesareintegratedinnewrollingreheatingfurnacesuchasworkingbeam,regenerativecombustion,evaporationcoolingandhotloadingandhotfeedingetc.Itshowsthatreheatingfurnacetechnologyisupgraded.DuringtheprocessofproductstructureadjustmentinShougang,becauseproductheatingqualityisimproved,energy-savingofreheatingfurnaceshouldpayattentiontoaspectssuchasenergy-savingofheatingvarietysteel,equalityofheatingsteel,heatingsystem,oxidationlossandsoon.Thiswillofferreferenceforenergy-savingofdomesticandoverseasreheatingfurnacetechnology.

简介：Sincethe2050mmhotstripmillwasputintooperationin1989,Baosteelhasmadegreatachievementsinincreasingproductivity,developingnewprocesstechnologiesandsteelproductsandimprovingproductquality.Inthepast18yearsfrom1989to2007,Baosteelhasconstructedfivehotstripmillswithatotalannualcapacityof19.8Mt.Indicesfortechnologystandards,productcategoriesandsteelgrades,productquality,bothtechnicallyandeconomically,taketheleaddomesticallyorreachedtheworldclasslevel.Astherearemanyhotstripmillsthatexpectedtobeputintooperationbytheendof2010,theoverallannualcapacitywillexceed30Mt,andtheproductwillcovergrainoriented(GO)Sisteelsandalloyedsteels.

简介：Ultrafastcoolingisanewtechnologywhichusedtocontrolthehot-rollingstripcoolinginrecentyearsontheinternationaldeveloped.Ifsuitablycooperatedwithanumberofothernewcontrolledrollingtechnologies,canachievefastandaccuratetemperaturecontrolinthehot-rolledstripproductionprocesstoobtaincorrespondingtransformationmicrostructureandidealmechanicalproperties.Thisarticledescribesthetechnicalprincipleandlayoutofultrafastcoolinginhot-rolledaswellasapplicationprofilesinthemajorironandsteelenterpriseinChinaandabroad.Carriedoutthelayoutofultrafastcoolinganalysisontheadaptabilityofsteelthatinstallbetweenthefinishingmillandlaminarcooling,onthisbasis,proposedtheuseofultrafastcoolingtechnologyproposals.

简介：Thesurfacetreatmenttechnologycanimprovethecorrosionresistanceofsteelsheetsandincreasethevalueofsteelapplication.ThesurfacetreatedsteelsheetsinBaosteelincludezincgalvanizedsteelsheets,singalvanizedsteelsheets,chromiumgalvanizedsteelsheets,andcolourcoatingsteelsheetswiththeapplicationintheareafromconstructiontoautomobiles,appliance,package,etc.Thedevelopment,applicationandmanufacturingtechniqueoftheseproductshavebecomethecorecompetitionpowerofBaosteel.ThearticlereviewsthedevelopmentsofsurfacetreatedsteelsheetsandsurfacetreatmenttechnologiesinBaosteelin10years,especiallyhotdipgalvanizedhighstrengthsteelproductsusedinvehicles.ThearticlealsolooksforwardintofurtherdevelopmentsofsurfacetreatmentsteelproductsandtechnologiesinBaosteel,whichwillfocuson:①thenewproductsofhotdipgalvanizedadvancedhighstrengthsteels;②moreenvironmentalfriendlyproductsorfunctionalcoatingproducts;③thedevelopmentofsurfacetreatmenttechnologiestomeettherequirementofhighersurfacequalityinthemarcket;④newtypeofsurfacetreatmentandcoatingtechnologies.

简介：Themajorapplicationsofelectricalsteel（ES）sheetsaremotors,transformers,etc.Inrecentyears,theraiseofcrudeoilpriceandincreasingenvironmentalconsciousnesstriggerthedemandsforsavingenergyandreducingCO2emissions,whichgreatlyacceleratethedevelopmentofhighqualityESsheets.Tomeetthequalityrequirementsofhighefficiencymotorsandtransformers,highgradeESsheetswithhighfluxdensityarecontinuouslydevelopedandintroducedtothemarket.Meanwhile,thepricecompetitionandqualityimprovementofgeneralgradesareimportantforthelowerendapplication.Theironlossof50CS1300（50A1300）issignificantlyreducedbycontrollingsomekeyparameters.Otherthanthenormalgrade,thehighestgradesofnonoriented（NO）ESaresuccessfullydevelopedrecently.Andallspecificationsof0.50and0.35mmamongJISC2552specificationcouldbeprovidedbyCSC.Astotheinsulationcoatingdevelopment,theCr-freeinsulationcoatinghasbeenintroducedtothemarketduetotheenvironmentalconcern,andhasbeenenormouslyadoptedinTaiwanmarket.Furthermore,thethickerinsulationcoatingtechnologyhasbeensuccessfullydevelopedforspecificwindpowergeneratorapplication.ThenewlydevelopedproductsandqualityimprovementsofelectricalsteelsheetsinChinaSteelareintroducedinthispaper.

简介：TheresearchbackgroundandtechnicalfeaturesofBaosteelsinteringfluegasdesulphurization(FGD)—swirl-jet-absorbingwetlimestone-gypsumsinteringFGDtechnology,processandequipmentareintroducedinthispaper.MaincontentsandachievementsofthepilotexperimentandtheengineeringpracticeofBaosteelFGDareanalyzedanddiscussedsystematically.PastengineeringpracticeexperiencesindicatethatBaosteelFGDhasthefollowingmerits:wideapplicabilitytosinteringfluegasfeatures,suchasfrequentlychangingtemperatures,unstableSO2concentration,intensivelyfluctuatingflowrates,etc.,highpollutantsremovalefficiency,lowinvestmentandenergyconsumption;stableandreliableoperation,utilizablebyproduct(gypsum),etc.ItindicatesthatBaosteelsinteringFGDisofextensiveapplicationvaluefortheFGDoflargeandmedium-scaledsinteringmachines.

简介：Inrecentyears,despitetheglobaleconomicrecessionandsteeloversupply,thedemandforhighstrengthsteel(HSS)andadvancedhighstrengthsteel(AHSS)sheetshasrobustlyincreased.Tosupplythematerialsneededforautomotivemanufacturing,variousAHSSproductsandapplicationtechnologieshavebeendevelopedbyBaosteel,includingthelst,2nd,and3rdGen.AHSS,whichmakesBaosteeltheworld'sfirststeelmakertocommerciallyprovideallthreegenerationsofAHSS.Recently,thenewGen.(the2ndand3rdGen.combined)AHSSproducts,whichfeatureultra-highstrengthandenhancedductility,havedrawngreatattentionfrombothsteelmakersandtheautomotiveindustryastheseproductscanbeusedtoproduceautopartswithcomplicatedshapesbycoldformingandhavegreatpotentialformanufacturingcarbodiesthatarelighterinweightandhavehighercrashresistance.Inthisarticle,theconcepts,properties,andapplicationsofBaosteel'snewGen.AHSSproducts,includingquenchingandpartitioning(QP)steels,twinning-induced-plasticity(TWIP)steels,andMedium-Mn(Mn-TRIP)steels,aredescribedandreviewed.Moreover,theprogressoftheBaosteellight-weightsteelcarbody(BCB)wasreported.

简介：Productioncharacteristicsofhighspeedrodarefastspeed,complexsectionandinternalmicrostructureevolution,whichbringgreatproblemstoanalyzeandsolvethequalitydisputes.Therefore,aserialprocessmodelshavebeendevelopedbasedonthecharacteristicsofhighspeedrod:duetorodstocktobesquaresection,atwodimensionmodelhasbeendevelopedtopredicttheevolutionofinternaltemperatureandgraincoarsening.Asfortherodrollingprocess,anautomaticsectiondesignsystemhasbeenwritten,whichcanshowsectionfillingconditionandprocessparameterssuchastemperature,pressureandrecrystallizationetcperpass.Asforrodcoolingstage,anintegratedmodelwhichcoupledphasetransformation,temperatureandfinalpropertieswasdevelopedandappliedinrealproductionwithgoodresults.

简介：Anonlinepinholedetectorbasedonthephotoelectricinspectionofcold-rolledsteelstripswasintroduced.Pinholedetectionisimportanttoguaranteethequalityofcold-rolledsteelstrips.ThedetectorherewasdevelopedindependentlybyBaosteel,andisdesignedbasedontheprincipleofphotoelectrictransfer.Typically,aninspectionlightsourceisinstalledabovethesteelstriptobeinspected,andaphotoelectricreceiverisinstalledbeneaththesteelstrip.Thepinholedetectorconsistsofasuper-brightLEDlightsourceandaphotoelectricreceiver,whichiscomposedprimarilyofphotomultipliers.Thesuper-brightLEDlightsourceilluminatesthestripsurface,andthelightthatpermeatesfrompinholesisdetectedandamplifiedbyaphotoelectricreceiver.Thephotomultipliertransformsthedetectedlightintoanelectricalsignal,whichislaterrecognizedandclassifiedbyasignal-processingcircuitandcollectedbyadata-acquisitioncard.Thedetectorcanaccuratelytrackthestripedgeandshieldthestripedgefromoutsidelight.Asaresult,thissystemcandetectapinholeinthestripedgewithasmallblindzoneontheedge.Mostimportantly,thedetectorexhibitsgoodinspectionaccuracyandcanaccuratelydetectapinholewithadiameterof155m.

简介：Inrecentyears,nitrogen-alloyedstainlesssteelshavebeenaresearchhotspotinthefieldofstainlesssteelproductandtechnology.Nitrogen-alloyedausteniticstainlesssteelsdevelopedbyBaosteelandtheirapplicationsareintroduced.Thesesteelsarenitrogen-controlledproducts304Nand316LN,nitrogencontainingeconomicalproductsBNseriesandhigh-nitrogenstainlesssteel(HNS)series.Theresultsshowthatthepresenceofnitrogencansignificantlyimprovethestrengthandcorrosionresistanceofsteelproduced.Bynitrogenalloying,economicalausteniticstainlesssteelswithconsiderablylessnickelthan304canbeobtained;thecorrosionresistancesofthesesteelsarealmostthesameas304.Furthermore,byascientificapproachofnitrogenalloying,high-nitrogensteelof0.8%nitrogencontentisfabricatedunderthenon-pressurizedconditions,andthepittingpotentialofthissteelis>1.0V.Atpresent,nitrogen-alloyedsteelsdevelopedbyBaosteelarewidelyutilizedinthemanufactureofcryogenicstoragecontainers,transportationcontainers,andmanyhouseholdwares.