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20032131CSP,LF22.1160016001/2[Si]+[O]=1/2SiO2G=-82.97(kJ/mol)(1)[Mn]+[S]=MnSG=5.0(kJ/mol)(2)2/3[Al]+[O]=1/3Al2O3G=-158.07(kJ/mol)(3)[Mn]+[O]=MnOG=-51.9(kJ/mol)(4)0.4%--1/2[Si]+1/3Al2O3=1/2SiO2+2/3[Al]G=111.23-0.019T(kJ/mol)1600G=75.10134Total13420032HEBEIMETALLURGY2003Number2112(1.;2.;056015)TF723A1006-508200302-0013-02DISCUSSIONABOUTSILICON-INCREASINGINLOW-CARBON-ALUMINIUMPIPINGSTEELWANGFeng-zhen1,LIQing-sheng1,GUOHui2(1.ScienceandTechniqueDepartment,HandanIronandSteelCompany,Handan,Hebei,56015;2.No.3Steelworks,HandanIronandSteelCompany,Handan,Hebei,056015)Abstract:Theadding-siliconinrefiningoflow-carbon-aluminiumisdemonstratedintheory,itispointedoutthatitcouldnotavoidunderpresentproductioncondition,somemeasurestoimproveproposed.KeyWords:low-carbon-aluminiumpipingsteel;refine;adding-silicon20030117134HEBEIYEJIN142.2LF1/2[Si]+1/3Al2O3=1/2SiO2+2/3[Al]-J1=1c-c*Ar=kc*I-cIAJ2=2c*-cA12rAk3CSPLFCSP5G=G0+RTlnK=0TG=-RTlnK=111.23-0.0193T(6)k=SiO2Al2O3K=C=0.6%Si=0.03%Mn=0.35%P=0.01%S=0.01%Als=0.04%fAl=1.018fSi=1.0446ln[Si%]=1.3333ln[Al%]+26738/T-4.69(7)3.11600G=68.801650G=67.70G3.216007[Al%]=0.020%[Si%]=0.79%[Al%]=0.040%[Si%]=1.99%[Si%]0.06[Al%]0.000089[Al%]=0.0203.31/2[Si]+1/3Al2O3=1/2SiO2+2/3[Al]120LF4,4123417a1/2SiO2f2/3Al[Al]2/3a1/3Al2O3f2/3Si[Si]1/2f2/3Al[Al]2/3f1/2Si[Si]1/220032176751Q235,0.1033600/30.5=12.15/t(0.10325%95%)960/30.5=0.85/t12.150.85=11.3/t20.4121170/30.5=15.80/t70%(0.41270%/95%)960/30.5=9.96/t15.89.96=5.84/t311.35.84=5.47/tQ23550505.47=273.5612100kg26kg535.47[1].[M].1995.7N/5290~335303.7410~485441.232~3433.26()10.51/0.521454kg5[1].[M].:1990.[2].[M].:,1990.