170 ~190tLF精炼过程脱硫影响因素分析

特殊钢 ›› 2018, Vol. 39 ›› Issue (5): 32-35.

170 ~190tLF精炼过程脱硫影响因素分析

李德军，许孟春，李晓伟，刘祥，于赋志

1鞍钢集团钢铁研究院，鞍山114009；
2海洋装备用金属材料及其应用国家重点实验室，鞍山114009

收稿日期:2018-04-23 出版日期:2018-10-01 发布日期:2022-05-27
作者简介:李德军(1976-),男，博士(2013年东北大学)，副研究员，2000年鞍山钢铁学院(本科)毕业，连铸过程产品质量研究。
基金资助:

Study of Affecting Desulfurization Factors in 170 ~ 190 t LF Refining Process

Li Dejun,Xu Mengchun,Li Xiaowei,Liu Xiang and Yu fuzhi

1 Iron & Steel Research Institutes of Ansteel Group Corporation, Anshan 114009；
2 State Key Laboratory of Metal Material for Marine Equipment and AppEcation, Anshan 114009

Received:2018-04-23 Published:2018-10-01 Online:2022-05-27

摘要/Abstract

摘要： 为了分析船板钢和低碳钢LF精炼过程脱硫效率,对各影响因素进行了分析研究,结果表明,在LF平均处理周期35 min以内,钢水中的硫脱除至0.010%以下,初始硫含量要低于0.027%;炉渣（FeO+MnO）含量控制在0.5%以下,碱度控制在4,Al2O3与MgO分别控制在20%和12%,脱硫效率最佳;硫含量脱除至0.010%以下,处理前钢水中的溶解氧尽量控制在16×10^-6以下,硫含量脱除至0.003%以下,钢水中的溶解氧尽量控制在5×10^-6以下;渣量控制在15～20 kg/吨钢,吹氩量控制在0.6～0.8m³/min比较适宜;前20 min内硫含量的降低速度最快,能够将钢水中的硫控制在0.010%以下,之后硫含量降低速度趋于平缓,为使硫脱至0.005%,精炼处理时间通常需要30 min以上。

Abstract: In order to study the desulphurization efficiency during LF refining ship plate and low carbon steels, every affecting factor is studied, the calculation results showed that only the initial sulfur content below 0.027% sulfur quantity in liquid steel could be removed below 0. 01% within 35 min which is LF average processing period； when controlling the slag (FeO + MnO) quantity below 0. 5% , basicity at 4, and MgO at 20% an 12% respectively, desulfurization efficiency is best； sulfur quantity is removed below 0.010% , then controlling dissolved oxygen in steel below 16 x10^-6 , sulfur quantity is removed below 0. 003% , then controlling dissolved oxygen in steel below 5 X 10^-6;the slag quantity is controlled at 15 〜20 kg/t - steel, controlling the gas flow rate at 0. 6 ~0. 8 m³/min suitably; sulfur quantity decreased fastest in the first 20 mins,it could be controlled below 0. 010% in steel, then it decreased gradually, if sulfur quantity is removed to 0. 005% , refined processing time is more than 30 min usually.

李德军, 许孟春, 李晓伟, 刘祥, 于赋志. 170 ~190tLF精炼过程脱硫影响因素分析[J]. 特殊钢, 2018, 39(5): 32-35.

Li Dejun, Xu Mengchun, Li Xiaowei, Liu Xiang , Yu fuzhi. Study of Affecting Desulfurization Factors in 170 ~ 190 t LF Refining Process[J]. Special Steel, 2018, 39(5): 32-35.