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1、th7ChinaInternationalSteelCongressTheKRDesulphurizationProcessTechnologyImprovementPracticeofWISCOLiaolihui,Lishengchao,Dengpintuan,YuMinghong,Pangjianfei,Wangyu,Wanlixin,SteelmakingPlantofWISCOSummary:OnthebasisoftheoryanalysisthisarticleexpoundsthekeytechnologiespracticeofoptimizationKRdes
2、ulfurizingagentingredients,mixersshape,desulphurizationprocessparametersofthesecondsteelmakingplantofWuhanironandsteel,Ithasachievedbetterpracticalresults,withstrongguidanceandenlightenment.Keywords:KR,desulfurization,thepretreatmentofhotmetal1PrefaceThesecondsteelmakingplanthasintroducedthe
3、KRdesulfurizationtechnologyfromNipponSteelsince1976.Ourplanthasaccumulatedrichexperienceandhasimprovedsometechnologysincetheconstructionof1#desulphurizationstation,theeconomicandtechnicalindicatorsofdesulfurizationhasachievedsignificantprogress.Andthenwehasconstructedthe2#desulfurizationstat
4、ionand3#desulphurizationstation,hasinnovated"one-whippedanddouble-grilled"processlayout,improvestheoperationrateofdesulphurization.However,thetechnicalindicatorssuchasthedesulfurizationconsumption(asshowninFigure1),theoperationcosts,andtheblenderlife(600times/a)specificationhaveachievednogre
5、atprogressoverthepasttwoyears.Figure1contrastfigurehotchargingsulphurandconsumption2ThebasicprincipleofdesulphurizationDesulfurizationofhotmetalistheprocesswhichusestheactivesubstancesindesulfurizerandsulfurelements374第七届中国国际钢铁大会inmoltenirontoproceedreactionrapidlywithoutplusheatsourceinprin
6、ciple,formingastableslagandseparatefrommolteniron,soastoreachthe[s]contentrequirementsofmoltenironthatconverterneeded.2.1ThethermodynamicsofdesulphurizationreactionThethermodynamicprocessofhotmetaldesulphurizationisironandsteelrefiningreactionprocess,itschemicalreactioncanbesimplifiedas:[S]+
7、M=（MS）or[S]+（O2-）=[O]+（S2-），or[S]+MO=（MS）+[O]，C[S]+M=（MS）+[C]。TheMreferstothemetalelementsofdesulfurizer(suchasMg),MOreferstooxidedesulfurizer(suchasCaO),MCreferstocarbidedesulfurization(suchasCaC2).ThethermodynamicparametersLs—thedistributioncoeff
