Abstract: The production practice shows that for production of 0. 20% 〜0. 24% C ultra-low-sulphur steel, in conditions of 150 t EAF charging- 40% metal + quality low sulphur scrap, EAF end [C] 0. 03% ~0. 05%, EAF tapping average [S] 0. 046%, LF initial average [S] 0. 017%, the ≤0. 001% sulphur content in finishing steel is gotten by controlling refining end [O] ≤2. 5 x 10^-6, end ( FeO + MnO) ≤0. 80%, controlling slag amount no less than 22 kg/t and adding aluminium amount 1. 85 kg/t, and sufficient argon stirring.

摘要： 生产超低硫0.20%～0.24%C钢时,在150 t EAF的炉料为40%铁水+优质低硫废钢,终点[C]0.03%～0.05%,电弧炉出钢平均[S]为0.046%,LF初始平均[S]为0.017%的条件下,控制精炼终点[O]≤2.5 X10^-6,终点(FeO+MnO)≤O.80%,控制渣量不小于22 kg/t_钢,铝消耗量1.85 kg/t_钢,氩气搅拌良好,成品钢中的硫含量≤0.001%。