转炉少渣冶炼的试验研究及工艺控制  

Research of slagless steelmaking and technology control in converter

作　　者：杨利彬[1] 刘浏[1] 庄辉 戴平 王忠刚 

机构地区：[1]钢铁研究总院,北京100081 [2]莱芜钢铁股份有限公司,山东莱芜271104

出　　处：《炼钢》2013年第3期28-31,共4页Steelmaking

摘　　要：通过热力学及物料平衡计算对转炉脱磷所需渣量进行了分析,得出了磷分配比与铁水硅含量、渣量间的关系:提高LP可以有效减少渣量。通过化渣及渣钢间脱磷、脱硫反应规律的研究提出了少渣冶炼的工艺措施。工业试验取得了良好的效果:石灰消耗为29.1 kg/t,渣量为91.73 kg/t;脱磷率为90.08%,LP平均为105.50,LS平均为8.14,终渣具有较强的脱磷、脱硫能力。通过LP、LS的影响因素分析,得出少渣冶炼终点控制工艺:终渣碱度3.5以上;终渣w(T.Fe)=18%～20%,避免高温出钢。Through thermodynamics and material balance analysis, the relation of slag quantity, silicon content of hot metal, and phoshorus distribution （Lp） was obtained. The higher Lp is, the lower slag quantity and silicon content would be required. On the base of regularity study of the slagging and dephosphorization and desulfurization reac- tion characteristics at steel-slag interface, the less slag steelmaking technology has been proposed. Results show that the lime comsuption has been control 29.01 kg/t, the slag quantity comes up to 91.73 kg/t, the dephosphorization rate of steelmaking process reaches 90. 08 %, Lp reaches 105.5 and Ls reaches 8. 14. By means of influencing factors anlysis of Le and Ls, the final controlling technology was that the basicity of final salg is controlled not less than 3.5, and the mass fraction of T. Fe of final slag is 18 %-20 %, preventing high tapping temperature.

关 键 词：低硅铁水 少渣冶炼 脱磷 渣量 

分 类 号：TF729[冶金工程—钢铁冶金]