Abstract: The effect of control of 50 t LF refining slag (FeO) , (MnO),/R,( CaO)/[(Al₂O₃) (SiO₂) ] and (S) on [0] index, sulfur partition ratio and Mn/S has been tested and analyzed. Results show that as (FeO + MnO)= 12% , basicity R 1.5 〜2.0, (CaO)/[ (A1₂O₃) (SiO₂) ] =1.5 ~2.0, average sulfur partition ratio £s 4.6, Mn/S =4.3 ~4.7, the as-cast inclusions in steel is spheroid I series sulfide and partial along grain-boundary distributed spheroid sulfide, and the B and C series inclusions do not found in rolled products to get better control of oxides inclusions in steel and metallurgy effect of low desulphurization ratio.

摘要： 试验分析了50 t LF精炼渣(FeO)、(MnO),R,(CaO)/[(Al₂O₃)(SiO₂)]和(S)的控制对[O]指数、硫分配比和Mn/S的影响。结果表明,当(FeO+MnO)=12%,碱度R值1.5~2.0,(CaO)/[(Al₂O₃)(SiO₂)]=1.5~2.0,平均硫分配比LS为4.6,Mn/S值4.3~4.7时,铸态夹杂物为球形Ⅰ类硫化物和部分沿晶界分布的球形硫化物,轧制钢材未发现B、C类夹杂,达到了较好的控制钢中氧化物夹杂和低脱硫率的冶金效果。

关键词: 硫易切削钢, 精炼渣, FeO, , MnO, 夹杂物