复吹转炉少渣脱磷炼钢工艺过程分析  

Theoretical analysis and trial experiments on combined blown converter less slag dephosphorization steelmaking process

作　　者：王杰[1] 曾加庆[1] 杨利彬[1] 侯葵[2] 任茂勇[2] 王文辉[2] 

机构地区：[1]钢铁研究总院工艺所,北京100081 [2]天津钢铁集团有限公司炼钢厂,天津300301

出　　处：《炼钢》2015年第3期31-35,共5页Steelmaking

摘　　要：对复吹转炉脱磷过程进行了热力学及物料和热平衡计算，并在此基础上进行了冶炼过程的理论模拟，得出“双渣法”脱磷期的工艺要点：脱磷期低温、适当碱度有利于促进磷的脱除；提高脱磷渣倒出率可以有效降低过程石灰消耗与渣量。工业试验取得了良好的效果：石灰、白云石消耗分别降低25．00％、36．67％，冶炼前期平均脱磷率62．95％，冶炼过程平均脱磷率90．72％。通过对脱磷率影响因素分析得出，脱磷期控制工艺为R=1．80～2．00，w（T．Fe）=16．00％～20．00％，T=1400～1420℃；脱碳期控制工艺为R=3．20～3．60，w（T．Fe）=16．00％～20．00％，T=1600-1640℃。Thermodynamics and material balance analysis were adopted, basea on wmcn theoretical simulations were carried out, and the key point of the process was got. The low temperature and proper basicity of the dephosphorization stage was better for the phosphorus removal, and the higher the deslagging ratio was, the smaller quantity of lime was consumed, and the smaller the slag quantity generated. Results of the trial experiments showed that,the lime and dolomite quantity dropped by 25 % and 36. 67 % respectively, and the average dephosphorization rate of 62. 95 % during the dephosphorization stage and 90.72% during the total process were got. By means of influencing factors analysis of dephosphorization rate, the control technologies of dephosphorization stage were concluded that, the basicity of the slag was 1.8 - 2. 0, the mass fraction of T. Fe was 16- 20 %, and the temperature of the bath was 1 400 - 1 420℃. And the control technologies of decarburization stage were concluded as, the basicity of the slag was 3.20 - 3.60, the mass fraction of T. Fe was 16 - 20 %, and the temperature of the bath was 1 600- 1 640℃.

关 键 词：脱磷 倒渣率 渣量 少渣冶炼 

分 类 号：TF704.4[冶金工程—钢铁冶金]