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《mathematical modeling on the growth and removal of non-metallic inclusions in the molten steel in a two-strand continuous casting tundish》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、MathematicalModelingontheGrowthandRemovalofNon-metallicInclusionsintheMoltenSteelinaTwo-StrandContinuousCastingTundishHAITAOLING,LIFENGZHANG,andHONGLIInthecurrentstudy,mathematicalmodelsweredevelopedtopredictthetransientconcentrationandsizedistributionofinclusionsinatwo-strandcontinuousca
2、stingtundish.Thecollisionandgrowthofinclusionswereconsidered.ThecontributionofturbulentcollisionandStokescollisionwasevaluated.Theremovalofinclusionsfromthetopsurfacewasmodeledbyconsideringthepropertiesofinclusionsandthemoltensteel,suchasthewettability,density,size,andinterfacialtension.T
3、heeffectofcompositionofinclusionsonthecollisionofinclusionswasincludedthroughtheHamakerconstant.Meanwhile,theeffectoftheturbulentfluctuationvelocityontheremovalofinclusionsatthetopsurfacewasalsostudied.InclusionsinsteelsamplesweredetectedusingautomaticSEMScanningsothattheamount,morphology,si
4、ze,andcompositionofinclusionswereachieved.Inthesimulation,thesizedistributionofinclusionsattheendsteelrefiningwasusedastheinitialsizedistributionofinclusionsattundishinlet.Theequilibriumtimewhenthecollisionandcoalescenceofinclusionsreachedthesteadystatewasequalto3.9timesofthemeanresidencet
5、ime.WhenStokescollision,turbulentcollision,andremovalbyfloatingwereincluded,theremovalfractionofinclusionswas16.4pct.Finally,theremovalofsolidandliquidinclusions,suchasAl2O3,SiO2,and12CaOÆ7Al2O3,attheinterfacebetweenthemoltensteelandslagwasstudied.Comparedwith12CaOÆ7Al2O3inclusions,thesili
6、caandaluminainclusionsweremucheasiertoberemovedfromthemoltensteelandtheirremovalfractionswere36.5and39.2pct,respectively.DOI:10.1007/s11663-016-0743-5ÓTheMinerals,Metals&MaterialsSocietyandASMInternational2016I.INTRODUCTIONFlowcontroldevices,suchasweirs,dams,turbulenceinhibitors,andbaffles,
7、havebeeninstalledatsuitablepo-CONTINUOUScastingtundishservesasabuffersitionsinthetundish,withapurposetoimprovetheandactsasdistributorsofthemoltensteelbetweentheflowpatternofthemoltensteelandpromotetheladleandthemold.Itshowsvariousmetallurgicalremovalofinclusions.Alarg
