提高炉渣中MnO向钢中传递的试验  

Experiment on improving transfer of MnO in slag to molten steel

作　　者：戴诗凡 吴伟[1] 马登[1] 张曦东[1] 王鹏[1] 

机构地区：[1]钢铁研究总院冶金工艺所,北京100081

出　　处：《钢铁》2017年第8期35-42,共8页Iron and Steel

基　　金：北京市自然科学基金资助项目(2172057)

摘　　要：为了提高锰矿直接合金化锰的收得率,根据热力学分析结果确定了降低渣钢间锰分配比的影响因素。分析结果表明,提高温度和碳的活度是降低渣钢间锰分配比的必要条件。由此设计了感应炉试验方案,并进行了试验研究。结果表明,精炼渣在配加还原剂的情况下锰矿直接合金化锰平均收得率为90.8%,碳化硅作为还原剂在配碳量为1.2~1.4时,锰分配比最低;高温、高碳质量分数可以有效降低渣钢间锰分配比,底吹强度、锰矿加入量等工艺参数对锰矿直接合金化的效果有影响,应控制工艺避免锰矿石和还原剂的加入对钢中磷、硫产生的不利影响。In order to improve manganese yield of manganese ore direct alloying, according to the results of thermody- namic analysis, the influence factors of reducing the manganese distribution ratio between slag and steel were deter- mined. The analysis results showed that improving the temperature and the activity of carbon were the necessary condi- tions to reduce the manganese distribution ratio between slag and steel. The test scheme of induction furnace was de- signed, and the experimental research was carried out. Results showed that the average yield of direct alloying of manga- nese in manganese ore was 90.8% with reducing agent in the refining slag. The manganese distribution ratio was the low- est with the carbon addition of 1.2 -1.4 in silicon carbide as the reducing agent. The manganese distribution ratio be- tween slag and steel could be effectively reduced at high temperature and high carbon content. Process parameters such as bottom blowing strength and manganese ore addition could affect direct alloying of manganese ore. The harmful influ- ence of the addition of manganese ore and reducing agent on the phosphorus and sulfur in steel should be controlled.

关 键 词：热力学分析 锰分配比 锰矿 锰收得率 直接合金化 

分 类 号：TF713[冶金工程—钢铁冶金]