300t复吹转炉冶炼低磷钢工艺研究  

Recearch on the technology of low phosphorus steel production in the 300 t converter

作　　者：杨利彬[1] 刘浏[1] 焦兴利[2] 邓勇[2] 徐晓伟[2] 

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081 [2]马鞍山钢铁股份有限公司第四钢轧总厂,安徽马鞍山243000

出　　处：《炼钢》2012年第4期43-46,共4页Steelmaking

摘　　要：通过生产数据分析,研究了马鞍山钢铁股份有限公司300 t转炉冶炼过程脱磷反应规律。并对渣钢间LP的影响因素进行了分析,结果表明熔池碳含量、温度,炉渣氧化性、碱度及熔池搅拌对LP有重要影响。制定了大型转炉低磷钢冶炼的工艺措施。通过应用取得了良好的效果:终渣碱度由3.6提高到3.9;终渣w(T.Fe)降低了2.31%;终点LP由87提高到了109;终点钢水w(P)由0.009 2%降低到0.006 6%,实现了300 t转炉低磷钢水的稳定生产。Through production data analysis the law of dephosphorization reaction in the process of converter steelmaking in Masteel is investigated and the factors affecting the Lp in the 300 t converter are analyzed as well. Results show that Lp is greatly affected by carbon content and temperature in the bath, oxidability and basicity of converter slag and bath stirring. Technological measures for refining the low phosphor steel in the large scale converter is drawn up. In the practical application very good results have been achieved. The end-point slag basicity is raised to 3.9 from original 3.6 and end- point slag w（T. Fe） is lowered to 2. 31~ and the end-point Le is raised to 109 from 87 and end-point liquid steel w（P） is reduced to 0. 006 6 ~ from 0. 009 2 %,thus smooth production of low phosphor steel by 300 t converter is realized.

关 键 词：脱磷 磷分配比 低磷钢 炼钢 

分 类 号：TF729[冶金工程—钢铁冶金]