简介：Thispaperdealswithacomparativeresearchbetweentwoprocessesofgranulation,namelymini-pelletizedsintering(MPS)andhybridpelletizedsintering(HPS),focusingonaspectssuchastheballingeffect,production,quality,andmineralographyandmetallurgicalperformanceofsinter.Theresultsindicatethatbothmethodscanresultinasatisfyingcapabilityinballingeffectandmetallurgicalperformanceofsinter,qualifiedtomeettheplantproductionrequirements,butwhenthegranulationtimeandgranulatingmoisturearesettoaround6minutesand7.0%respectively,MPSisbetterthanHPS.

简介：Thepapermainlydiscussedtheinclusionsandthepurityofmoltensteelandcontinuouscastingslabintapping,argon-bubbling,LFrefining,VDvacuumdegassingandcontinuouscastingtundishprocessesduringthesteelmaking.Atthesametime,theimprovementmeasuresofsmeltingprocesswereindicated.Si-Al-BaalloyandCa-Sideoxidationeventuallywereadoptedin120tconverter.Theamountofthetappingwasabout135t.AfterfeedingAlwireandaddingpremeltedslaginfurnace,pickedupthesampleafterthebottomargon-bubblingwhichhadbeendoneforover5minutes.Thelime,fluorite,calciumcarbideandAlpowderswereusedtoproducewhiteslaginLF.Thenthealloycompositionswereadjusted.FeedingCawireafterthetreatment,andtookoutover5minutes’softconverting.TheVDvacuumdegassingshouldbekeptfor15minutesbellow1.5torr.Afterthat,Cawirecouldbefed.Finally,castingtheslabintothesizeof260mm×2280mm.Theresearchshowed:（1）Inconverterprocedure,thedephosphorizationeffectturnedoutgoodwhentheratioofdephosphorizationwas88.2%.Thefinaloxygenandnitrogencontentssatisfiedthedemand,andtheeffectsofthefinalcontrolandbottom-blowingweregood.（2）DuringtheLFrefiningprocess,thenitrogenseldomadded.Itshowedtheexcellentsealingeffectandtheoptimizationoftechniquesonoperatingwhichhadreachedthedomesticleadinglevel.（3）AftertheVDvacuumdegassingprocess,theSi,Mn,P,O,Ncontentswerealmoststeady.Thesulphurcontentkeptdecreasingto0.003%andthe[H]contentwas1.9ppm.Theeffectofthevacuumdegassingprocesswasgood.（4）Theoxygencontentwascontrolledat11ppminthecontinuouscastingprocess,andthenitrogencontenthadincreasedto53ppmwiththeΔ[N]28ppm.Therefore,inordertopreventthemoltensteelfromreoxidization,theprotectionofthecontinuouscastingshouldbecontrolledrigorously.（5）TheinclusionsthatexistedbeforetheLFrefiningprocessweremostlyMnO-Al2O3-SiO3compositeinclusions

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：Tubehydroformingtechnologyhasshowntheattentionoftheautomotiveindustryduetoitsadvantagesoverconventionalstampingandweldingmethods.Inthisstudy,thetubehydroformingprocessincludingtubebending,preformingandhydroformingprocessforanautomobilesubframeisanalyzedanddesignedbythesimulationsoftwareAutoFormofafiniteelementmethod(FEM)program.Aparametricstudyiscarriedouttoobtaintheeffectoftheformingparameterssuchasinitialtubesizeandloadingpathonthe...

简介：AnalyzedandstudiedthecharactersofhighstrengthlowalloysteelwhichcontainMo,Cr,NbandNi.etc.Followingactualrolling,combiningthefeatureofrollingmode,andexploitingtheequipmentadvantageof5mHeavyPlateMill,optimizedthematerialdesign,heatingtemperatureandrollingmethod,stabilizedrollingprocessofthinalloyedsteel,thequalityindexwasadvanced.

简介：Thisstudyanalyzesthefactorsofinfluenceon0~#continuouscasterinNo.1SteelmakingPlantofXinjiangBayiIron&SteelCorporation(hereinafterreferredtoasBasteel).Diameteroftundishuppernozzleissmall,andthemoltensteelleakageaccidentshavebeengreatlymanifoldedinthehighcastingspeed.Inordertoincreaseyieldof0~#continuousecasterinNo.1SteelmakingPlantofXinjiangBayiIron&SteelCorporation,andaseriesofameliorationmeasurewasputforward.Throughenlargingdiameteroftundishuppernozzle(fromφ21mmtoφ21.5mm),afterthewaterdistributionofthesecondarycoolingwasoptimized.Basedonstabilizingthequality,improvingtheaveragecastingspeedandworkrateofthecaster,thecapacityofthebilletcontinuouscasterwasimproved.Abetterresultswasgained;theaveragecastingspeedhadbeenincreasedfrom3.04m/minto3.21m/min.Productionofthecasterhadbeenimprovedfrom1005179.926tin2008to1040853.075tin2009.Qualityoftheconcastingbilletsandproductionhadalsobeenstabilized.

简介：ThemetalsprayformingprocesswasexaminedusingmathematicalsimulationandverifiedthroughtheprototypingevaluationatBaosteel'stestanddevelopmentfacilities.Themathematicalmodelcomprisedoffoursections,includingjetgasflowinthedepositionchamber;singledropletbehavioralongitstrajectorypath;probabilityandstatisticalanalysisofdropletmassbehavior,andforecastoftheshapeandtemperaturedistributionofthebilletduringthesprayformingprocess.

简介：Theprocessesoffineironorereducedinfluidizedbedhavebeenreviewedinthispaper,thesuperioritiesandlimitationsoftheprocessesofdirectreduction,pre-reductioninfluidizedbedhavealsobeencomprehensivelyanalysed,whichmatcheswithbathsmeltingfurnaceorcokebedtypefurnace.Theanalysishasalsobeenmadeonseveralcontroversialtopics,andthegasuseratiohasbeenpointouttobethekeyofthecompetitionofthereductionprocessinfluidizedbed.Thesuitabilitywithfinalreductionfurnaceisalsoimportanttotheenergysavinginthewholesmeltingreductionprocess.

简介：Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.

简介：Thelimestone-gypsumfluegasdesulfurization(FGD)processhasbecomethemostwidespreadprocessintheworldforsulfurremoval.Theswirl-et-absorbingwetlimestone-gypsumsinteringFGDtechnologywasdevelopedforsinteringfluegasdesulfurization,andthisprocessproducesvolumesofwastewaterwithvariouscontaminantsthatrequirestreatmentbeforedisposalorreuse.Inthisstudy,thewastewaterqualityfromthreedifferentsinteringFGDsystemsatBaosteelGroupwasinvestigatedandcomparedwithwastewaterfrompowerplantFGD.AtreatmentprocesswasproposedwhichissuitableforsinteringFGDwastewater.Aftertreatmentwithaneutralization,coagulationandsedimentationprocess,heavymetalsinthesinteringFGDwastewaterwerereducedtoalevelmeetingtherelevantemissionstandards,butthepHandammoniaconcentrationweretoohigh,andafurthertreatmentprocesswasneeded.DuetocertainsimilaritiesandcomplementaritiesbetweensinteringFGDwastewaterandcokingwastewater,itisentirelyfeasibletomixthepretreatedsinteringFGDwastewaterintoabiologicalcokingwastewatertreatmentsystem.ThisstudyindicatesthatitisentirelyfeasibletomixpretreatedsinteringFGDwastewaterintothebiologicaltreatmentsystemsusedforcokingwastewaterfromtheironandsteelindustries.

简介：TheAODisbyitsverynatureandpurposealargegeneratorofCO2.ThetotalCO2emissionfromtheprocesscanbedividedintotwoparts-thedirectpartwhichisproportionaltothecarbonremovalfromthemetalandtheindirectpartwhichisrelatedtotheconsumptionofadditivessuchasreductionagents,slagformersandalloys.TheproductionoftheadditivestypicallyrequiredforaheatcauseslargeemissionsofCO2,infact,oftenlargerthanwhatisgeneratedfromthedirectpart.Byapplyingareal-timeadaptiveoptimizationoftheoxygentoinertgasratiooversmalltimeincrements,theoverallcarbonremovalefficiencyisincreasedwhiletheconsumptionofreductionagentsandslagformersaredecreased.ThisremovesunnecessaryproductioncostsandminimizesthetotalemissionofCO2.Inthispaperaprocessconceptwithoptimizedgasadministrationoveralargenumberoftimeincrementsiscomparedwithamoretraditionalprocesspractice.TheworkisbasedonindustriallyprovenprocessmodelsintegratedintheUTCASsoftwarepackageforconvertermanagementandcontrol.Finally,thispaperconcludesonhowthesuggestedprocesscanbeappliedinactualplantoperation.

简介：Withthecontinuousimprovementofproductqualityandfunction,thequalitycontrolofmoldsteelisbecomingincreasinglystricter.Argonprotectionisessentialforensuringcastingqualityduringingotcasting.Thedevelopmentofargonprotectioniningotcastingandtheproductionprocessofenclosedargonprotectionin40tlineisdiscussed,withparticularfocusgiventhefactorsaffectingtheflowofoxygenintheargonprotectioncoverarediscussed.Theinfluenceofsomerelatedfactorsontheoxygencontentisanalyzed.Onthebasisoftheonlinemeasurementsoftheoxygencontent,theoptimizedoperationalapproachesforimprovingtheeffectofargonprotectionaredeveloped.Thiscandecreasetheliquidsteelviasecondaryoxidation,andimprovethequalityoftheingots.

简介：Inthisstudy,thespheroidizationprocessoflarge-deformedsteelundervariousconditionswasresearched.Steelwithahighcarboncontent(1.0%C)wasfirsttreatedthermomechanicallyusingmultipassrolling.Thenitunderwentspheroidizationtreatmentsatdifferentheatingtemperatures,usingvariousheatingtimesandcoolingrates.Spheroidizationprocesseswithalowerheatingtemperature,shorterheatingtime,orfastercoolingratethanthoseofthetraditionalprocessallshowedgoodresults,indicatingthatthespheroidizationprocesswaspromotedsignificantlybythelargedeformationprocess.Grainrefinementandfragmentationofcementite,alongwiththelargedeformationprocess,promotedthisspheroidizationprocess.

简介：Thisstudydiscussesthekeyfactorslimitingtherateofpulverizedcoalinjection(PCI)inblastfurnaces(BF),whilethepracticeandexperiencesofBaosteel'sBFproductionwithhighproductivityandlowfuelconsumptionarealsoanalyzed.AmethodologybasedontechnologicalanalysisforachievingareasonablePCIrateisproposed.ItisemphasizedthathighBFproductivityshouldberealizedatthemaximumboshgasindexbasedonahigherblasttemperatureandtheexcellentqualityofrawmaterials,aswellasahighblastvolumeandmeltingstrength.

简介：Increasingproductioncapacityandoperatingrate,reducingfuelratesandcostsofhotmetal(HM)aretheurgenttasksfortheCOREXprocess.Inthisstudy,thevariousfactorsonthefuelconsumptionofCOREXareresearchedfromthetheoreticalanalysisbasedonthecalculationsofmaterialbalancesandheatbalances.CombinedwiththeproductionperformancesandpracticesofCOREX-2000(Saldanha,India)andCOREX-3000(Baosteel),thetechnicalmeasuresofreducingthefuelrateareanalyzedandthewayforwardoftechnicalinnovationisaddressedanddiscussedwiththestandpointoftheCOREXprocessimprovement.

简介：Becauseofthelowtemperature,largewastegasvolume,highpollutantcontent,andcomplicatedcompositions,wasteheatrecoveryandemissiongastreatmentofsinteringfluegashavealwayspresentedachallengeinthesteelindustry,andthisissuehasattractedwidespreadattentionbothlocallyandabroad.Recently,basedonthefirstdomesticpilotplantanddemonstrationproject,Baosteelhasperformedaseriesofinnovativeresearchanddevelopmentinvestigationsonitssinteringfluegasrecirculating(SFGR)process,inwhichthesystemdesignandoptimization,dioxin-relatedcontaminantsourcesuppression,orematchingstructureoptimization,wear-resistantdesignofcyclingfansandpipelines,high-efficiencydustremovalequipment,systemcontrolandstableoperationstrategy,fluegasmixingandswitchingcontrol,circularhoodsealing,oxygencontentconditioning,recirculationsinteringsystemprocesscontrol,andmodeldevelopmenthavebeenstudied,andacompletesetofequipmentandtechnologyfortheSFGRprocesshasbeeninitiallydeveloped.TheinvestigationresultssuggestthattheSFGRprocesscannotonlysignificantlyreduceexhaustgasvolumeandpollutantemissionsbutalsorecoverlow-temperaturewasteheatandreducetheenergyconsumptionofsintering;therefore,theoveralltechnologiespossessgreatvalueinenergysavings,pollutionemissionreduction,andsinteringorequality/yieldimprovement.

简介：Sprayformingisanewtypeofmetalmaterialformingprocess,whichcanproducemetalblankssuchasbillet,tube,plateetc.Amathematicalmodelhasbeendevelopedtoforecasttheshapeevolutionoftubebilletsduringthesprayformingprocess.Theatomizermassfluxas,radialdistributioncoefficientbs,drawvelocityanddiameterofmandrelwereconsideredinthismodelandtheinfluenceofdifferentparameterssuchasmetalflowrate,drawvelocityofmandrel,diameterofmandrelonthetube'sshapechangeweresimulatedandanalyzedinthispaper.Thesimulationresultsobtainedfromthismodelcanbeprovidedtoengineersasreference.

简介：Inthispaper,therecentstateandproblemsofthesinkrollinCGLaredescribed.Severalmethodsofincreasingitsoperationallifespanareintroduced,suchassurfacecoatingtechnologyandsleevematerialtechnology.Fundamentallytheycannotsolvetheproblemsofsurfacequalitycausedbythecontactbetweenstripandroll.Onthisbasis,thenewlydevelopedprincipleandsolutionsforhotdipgalvanizingtechnologywithoutsinkrollarehighlyemphasized,theyareFloatTechnology,Electromagneticpumptechnology,Electromagneticenclosedslotbyhigh-frequencyAC,Electromagneticenclosedslotbyhigh-frequencyDC.Acomparisonamongtheirfunctionsandcharacteristicsismadeandthepossibilityofitsapplicationisalsodiscussed.Finallyitcomestoaconclusionthatelectromagneticenclosedslotrepresentsthedirectionofacontinuoushot-dipgalvanizingsteelstripinthethe21stcentury.Ithasaverybroadapplicationprospects.BaosteelTechnologyCenterisfocusedontheresearchanddevelopmentofthistechnology.Astechnologyadvances,industrialapplicationsispossible.

简介：Someofthemaincoolingprocessesandequipmentthatarecurrentlybeingusedinthecontinuousannealingprocessline(CAPL)atBaosteelareintroduced,aswellastheircoolingcontrolmodeltechniques,themodelingprincipiumandtheirapplicationresults.Withchartsindicatingthecontroltrendsinrealprocesses,thepowerfuladjustingabilityofthecontrolmodelswithprocessvariabledifferencesandtheirexcellentcontrolprecisionareshowninthisstudy.

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