低碱度顶渣控制帘线钢中CaO–SiO2–Al2O3–

261Vol.26No.120042JournalofUniversityofScienceandTechnologyBeijingFeb.20042003–03–0329(No.50274006)Al2O3[1]Gaye[2~4]Al2O311.1;6.67kPaC,SiMn()C0.65%~0.78%Si0.13%~0.24%Mn0.60%~0.63S0.0086%~0.012%P0.0084%~0.012%Al0.0002%~0.0007%1.21284Al2O3()728CaO,SiO2Al2O3CaO2SGO216–Bll1CaO–SiO2–Al2O3–MgO,100083Al2O3Al2O3Al2O38TF703.61Table1Compositionofthetopslag1234567w/w0.81.01.21.5w/%5101520253040Vol.26No.1CaO–SiO2–Al2O3–MgO•27•±2Al2O3200mm,MgO1kg,16005minSi30s5min205101520253040min10g40minEDX33.1Si–MnMnO–Al2O3–SiO2CaO–SiO2–Al2O3–MgO4057218333823.2CaO–Al2O3–SiO22[5]CaO–Al2O3–SiO2w/w0.20~1.0Al2O38~25MgOCaOCaOMgOAl2O3–SiO23~530.71~1.00Al2O3Al2O315.06Al2O341.05~1.190.71~1.001.05~1.19Al2O35.0112.08Al2O3Al2O3Al2O31Fig.1SchematicdiagramoftheexperimentalfurnaceAr2Fig.2Plasticareaoftheinclusion0.00.20.40.60.81.0w(Al2O3)30.71~1.00Fig.3Distributionoftheinclusioninsteelwhilethebasi-cityofslagis0.71–1.000.00.20.40.60.81.00.00.20.40.60.8w(SiO2)4.32%7.46%10.59%11.87%12.90%15.06%17.00%18.16%19.89%21.78%31.15%0.71~1.00wAl2O3•28•2004151.23~1.36Al2O38.546Al2O3Al2O36(a)0.71~0.83Al2O3Al2O38%~25Al2O32.6%~8Al2O36(b)1.05~1.19Al2O3Al2O3Al2O38%~252.5%~7.6Al2O36(c)1.23~1.36Al2O38%~25Al2O32.4%~7.06CaO–MgO–SiO2–Al2O3w/w0.7~1.36Al2O3Al2O30.7~1.002.0~3.0Al2O38CaO–MgO–SiO2–Al2O3Al2O3Al2O3(Al2O3)s=(Al2O3)in(1)(Al2O3)sAl2O3(Al2O3)inAl2O30.00.20.40.60.81.0w(Al2O3)41.05~1.19Fig.4Distributionoftheinclusioninsteelwhilethebasi-cityofslagis1.05–1.190.00.20.40.60.81.0w(Al2O3)51.23~1.36Fig.5Distributionoftheinclusioninsteelwhilethebasi-cityofslagis1.23–1.361.00.80.60.40.20.01.00.80.60.40.20.05.01%12.08%15.96%19.39%21.56%24.31%31.29%1.00.80.60.40.20.01.00.80.60.40.20.05.48%8.54%10.38%16.74%20.11%21.43%34.98%1.23~1.361.05~1.19051015202530354005101520253035400510152025303540Al2O3/%Al2O3/%Al2O3/%60.71~0.83(a),1.05~1.19(b)1.23~1.36(c)Al2O3Al2O3Fig.6RelationbetweenAl2O3contentininclusionandthatinslaginmassfractionwhilethebasicityofslagis0.71–0.83(a),1.05~1.19(b),and1.23~1.36(c)(a)=0.71~0.83(b)=1.05~1.19(c)=1.23~1.36020406080100Al2O3/%w(SiO2)w(SiO2)w(CaO+MgO)w(CaO+MgO)Al2O3Al2O3Vol.26No.1CaO–SiO2–Al2O3–MgO•29•K=a(Al2O3)in/a(Al2O3)s(2)a(Al2O3)inAl2O3a(Al2O3)sAl2O37CaO–MgO–Al2O3Al2O3[6]Al2O34%~357Al2O30.71.3Al2O3(2)Al2O3Al2O3Al2O34(1)SiAl2O3(2)0.71~1.00Al2O315.061.05~1.20Al2O312.081.23~1.36Al2O38.54(3)0.7~1.00Al2O381HideakiSuito,RyoInoue.Thermodynamicsoncontrolofinclusionscompositionsinultra-cleansteel[J].ISIJInt.1996,36(5):5282GayeH,RiboudPV,WelfringerJ.Useofaslagmodeltodescribeslag-metalreactionsandprecipitationofin-clusion[J].IronmakingSteelmaking,1988,15(6):3193GatellierC,GayeH..Inclusionscontrolinlow-aluminumsteel[J].LaRevuedeMetallurgie-CIT,1992,89(4):3614StouvenotF,GayeH.Secondarysteelmakingslagtreat-mentforinclusionscontrolinsemi-killedsteels[J].Elec-tricFurnaceConferenceProceeedings,1994,52(12):4235BernardG,RiboundPV,UrbainG.Oxideinclusionsplas-ticity[J].LaRevuedeMetallurgie-CIT,1981,78(5):4216.[M].:1998ExperimentalResearchofCompositionControlofCaO-SiO2-Al2O3-MgOIn-clusionbyUsingLowBasicTopSlagforTireCordSteelWANGLifeng,ZHANGJiongming,WANGXinhua,WANGWanjunMetallurgySchool,UniversityofScienceandTechnologyBeijing,Beijing100083,ChinaABSTRACTTheeffectoftopslagcompositiononCaO-Al2O3-SiO2inclusioncompositionwasstudiedbycon-trollingtheconditionofdeoxidizationandcompositionoftopslaginexperimentalfurnaceinwhichthetirecordsteelwasmelt.ThecontentofAl2O3ininclusionincreasedwiththatintopslagincreasingwhilethebasicityoftopslagwasfixed.PlasticinclusionpresentedwhilethecontentofAl2O3intopslagwasbelow8%.Itisconcludedthatthecompositionoftheinclusioncanbecontrolledwithintheplasticareabycontrollingtheconditionofdeoxidiza-tionandthecompositionoftopslag.KEYWORDStirecordsteel;inclusion;topslag;deoxidizationCaO20406080Al2O3w(Al2O3)7CaO–MgO–Al2O3Al2O3Fig.7ISO–Al2O3inCaO–Al2O3–SiO28060402080604020w(SiO2)SiO20.10.20.30.40.50.6=1.3=0.7=1w1600