通过工业试验对低碳冷镦钢的LF精炼渣成分进行了优化。试验结果表明:适合于冶炼低碳冷镦钢的精炼渣成分为w(CaO)=50%～55%、w(Al2O3)=30%～35%、w(CaF2)=5%～10%、w(SiO2)<5%、w(MgO)<5%、w(FeO)<1%;LF精炼过程可将钢水中w(S)从389×10-6降到50×10-6,w(T.O)从54.0×10-6降到21.1×10-6。当钢水中w(S)<50×10-6,钙处理后夹杂物中平均w(S)<1.9%。将优化后的工艺应用于低碳冷镦钢的批量生产后,精炼渣料消耗降低了6.5 kg/t,吨钢成本降低了10元以上。 The LF refining slag composition of low-carbon cold heading steel was optimized through industrial tests. The results show that the composition of the refining slag suitable for smelting low carbon cold heading steel is from 50% to 55% of w (CaO), 30% to 35% of w (Al2O3), 5% to 10% of w (CaF2) The content of w (S) in molten steel decreased from 389 × 10-6 to 50 × 10-6 w (SiO2), <5% w (MgO) <5% and less than 1% w (TO) dropped from 54.0 × 10 -6 to 21.1 × 10 -6. When the w (S) is less than 50 × 10-6 in the molten steel, the average w (S) in the inclusions after calcium treatment is less than 1.9%. After the optimized process was applied to mass production of low-carbon cold heading steel, the refining slag consumption was reduced by 6.5 kg / t, and the cost per ton of steel was reduced by more than 10 yuan.