预览加载中，请您耐心等待几秒...

KR脱硫在含钒钛铁水中的应用.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

KR脱硫在含钒钛铁水中的应用 Abstract KRdesulfurizationisawell-knownprocessfortheremovalofsulfurfromliquidiron.However,KRdesulfurizationcanalsobeappliedtoironcontainingvanadiumandtitanium.TheaimofthispaperistoreviewtheapplicationofKRdesulfurizationinironcontainingvanadiumandtitanium,andtoevaluatetheeffectivenessofthisprocess. Introduction Steelproductionrequirestheuseofironthatislowinimpuritiessuchassulfur,vanadiumandtitanium.Theseimpuritiescancauseanumberofproblemsduringthesteel-makingprocess,includingreducedductility,fatiguestrength,andtoughness.Inordertoproducehigh-qualitysteel,itisimportanttoremovetheseimpuritiesfromtheiron. KRdesulfurizationisaprocessthatinvolvesaddinglime(CaO)totheliquidiron,whichreactswithsulfurtoformcalciumsulfide(CaS).Thecalciumsulfidethenfloatstothesurfaceoftheliquidiron,whereitcanbeeasilyremoved.Thisprocessiswidelyusedinthesteelindustryfortheremovalofsulfurfromliquidiron. However,KRdesulfurizationcanalsobeappliedtoironcontainingvanadiumandtitanium.Vanadiumandtitaniumareoftenpresentinironore,andcanbedifficulttoremoveduringthesmeltingprocess.Iftheironisnotproperlytreated,theseimpuritiescanleadtoreducedmechanicalpropertiesinthefinalsteelproduct. ApplicationofKRDesulfurizationinIronContainingVanadiumandTitanium ThereareseveralreasonswhyKRdesulfurizationiseffectiveinremovingvanadiumandtitaniumfromliquidiron.First,theadditionoflimetotheliquidironcausesareductionintheactivityofvanadiumandtitaniumintheiron.Thisreducesthetendencyoftheseelementstoformcomplexcarbides,whichcancauseproblemsinthefinalsteelproduct. Second,thecalciumsulfidethatisformedduringKRdesulfurizationcanreactwithvanadiumandtitaniumtoformcalciumvanadate(Ca3(VO4)2)andcalciumtitanate(CaTiO3),respectively.Thesecompoundshaveahighmeltingpoint,andtendtoremainintheslaglayerratherthanbeingtransferredtothesteel.Thishelpstoreducethecontentofvanadiumandtitaniuminthefinalsteelproduct. Finally,theformationofcalciumsulfideduringKRdesulfurizationalsohelpstoreducethesulfurcontentoftheliquidiron.Thisisimportant,