低碳钢LF精炼经济型脱硫工艺过程分析

Analysis of Economical Desulfurization Process of Low Carbon Steel during LF Refining

结合某低碳钢的LF精炼实际,分析了CaO-CaF_2精炼渣条件下精炼渣量、渣中CaF_2含量、吨钢吹氩量对脱硫及LF精炼前期吹氩流量对表观脱硫系数(KS)的影响,提出了一种LF经济型脱硫工艺。结果表明:LF精炼前期,随着底吹氩流量增加,KS逐渐增大。吨钢吹氩量为0.26~0.28 m^3/t、渣量为22 kg/t、w(%CaF_2)为26%~28%时,脱硫率最高,脱硫效果最佳。

Combined with the refining practice of a certain low carbon steel, the effect of refining slag amount, CaF2 content in the slag and argon blowing amount per ton steel on the desulphurization was analyzed under the condition of CaO-CaF2 refining slag system. The apparent desulfurization coefficient（KS）’s change was also studied in the early LF refining stage, and proposed an economical desulfurization practice process. The result showed that, during the early stage of LF refining, with the increasing of argon blowing flow, KS increases gradually. The argon blowing amount per ton steel is 0.26-0.28 m^3/t, the slag quantity is 22 kg/t and the CaF2 content in the slag is 26%-28%, the desulfurization rate is higher and the desulfurization effect is better.