BaO-CaO渣系不锈钢氧化脱磷研究  

The research on the oxidizing dephosphorization of stainless steel using BaO-CaO slag system

作　　者：徐玉松[1] 许云花 顾永振 田国建[1] 

机构地区：[1]江苏科技大学(张家港)冶金与材料工程学院,江苏张家港215600

出　　处：《炼钢》2015年第5期12-15,共4页Steelmaking

摘　　要：针对不锈钢氧化脱磷容易导致合金元素铬损耗的问题,在中频感应炉中采用20%CaO-45%BaO-15%Fe2O3-10%Cr2O3-10%CaF2渣系进行氧化脱磷试验。在热力学计算的基础上,通过调配BaO含量、钢液中初始碳含量和钢水处理温度,获得脱磷率不低于50%,脱磷过程中铬氧化量不超过8%的试验结果。试验研究表明:该试验渣系的脱磷效果比CaO渣系好,与BaO渣系相当;随着钢液中碳含量的提高,脱磷率增加、铬损减小;随着熔炼温度的升高,脱磷率降低、铬损减小,在1 750 K时脱磷率和铬损耗处于最优化水平。Due to the chromium loss of stainless steel caused by oxidating dephosphorization,the experiment of dephosphorization was carried out in the medium frequency induction furnace, with 20%CAO-45%BaO-15%Fe2O3-10%Cr2O3-10% CaF2slag system. On the basis of thermodynamic calculations, through deploying BaO mass fraction, the initial carbon mass fraction and steel processing temperature, dephosphorization rate was super than 50 %, and chromium loss rate was less than 8%. The results showed that the new slag system was better than CaO based slag system and was equal to BaO based slag system. With the increasing of carbon mass fraction in the molten steel, the dephosphorization rate was increased and the chromium loss rate was decreased. As the temperature increased, the dephosphorization rate and chromium loss rate were decreased. When the temperature was 1 750 K, the dephosphorization rate and chromium loss rate were at the optimization level.

关 键 词：不锈钢 氧化脱磷 BaO-CaO渣系 铬损 

分 类 号：TF704.4[冶金工程—钢铁冶金]