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1、thPlenarySession7ECCCSession11DemandsonSecondaryMetallurgyinKeywordsSteelmakingforContinuousCastingofBilletcastingofspecialsteelsforwire-rodandbar;LongProductscastabilityandfluidityofsteel;inclusionengineering;customisedsecondarymetallurgyfocusingonladlefurnace,vacuumtankdegassing;top-slagpra
2、ctice;Mr.CheinHungChen,ManagerofMetallurgicalDept.generalqualityresults;operationalaspects,trendsinDragonSteelCorporation,Taichung/Taiwansecondarymetallurgy.(ASubsidiaryofChinaSteelCo.Kaoshiung)Mr.ChengYenWu,SuperintendentEAFPlantIntroductionSteelmakingDepartmentTheelectricarcfurnace(EAF)shop
3、atDragonSteelDragonSteelCorporation,Taichung/TaiwanCo.isfullyfocusedonlongproductsbyoperatinga(ASubsidiaryofChinaSteelCo.Kaoshiung)150ttwin-shellDCelectricarcfurnace,twoladlefurnaces,onevacuumtankdegasser,onefourstrandMr.SeppKohl,ChiefTechnologistbloom/beam-blankcasterandoneSBQ(specialbarSMSC
4、oncastAG,Zurich/Switzerlandquality)six-strandbilletcaster.Onthedownstream(MemberofSMSGroup)sidethereisamediumsectionrollingmillforbloomsandbeam-blanks.ThebilletsarefurtherprocessedinAbstractthewire-rodmillsofChinaSteelCo.inKaoshiung/Taiwantosubstitutethebloom-billet-wirerouteatDragonSteelCorp
5、orationassubsidiaryofChinatheseworksasfaraspossible.SteelCorporation(DSC)/TaiwanisoperatingatitsTaichung/Taiwansiteacomplexsteelmakingfacilityofoverthreemilliontpycapacity,consistingofanelectricarcfurnaceshopwithatwin150tDC-electricarcfurnaceinstallation,twocastersforlongproducts,oneforblooms
6、andbeam-blanksandoneforbillets.Besidethislong-productlineDSCcommissionedinspring2010asteelmakingplantforflats.Itconsistsinitspresentstageofoneblastfurnaceplusthenecessaryauxiliaryplants,twoBOF(basicoxygenfurnaces)includingdesulphurisationplant,oneRHdegasserandtwotwinstrandslabcasters.Ahotstri
7、pmilltransformstheslabsintohotFigure1:LayoutofDragonSteel`sProductionrolledcoils.Anextensionbyoneadditionalblastfacilitiesfurnace,oneconverter,oneladlefurnaceandoneRHplantisalreadyunderway.ThefinalcapacityRefiningReactionsBasicsthenwillbeexce