LF精炼渣发泡性能影响因素研究  

Research on Influencing Factors of Foaming Performance of LF Refining Slag

作　　者：李萍 李四军 刘俊宝 宁伟 席浩栋 吕明[2] LI Ping;LI Sijun;LIU Junbao;Ning Wei;XI Haodong;LV Ming(The Steelmaking Plant of Yinshan Section Co.Ltd.,Laiwu Steel Group,Laiwu 271104,China;School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]莱芜钢铁集团银山型钢有限公司,山东莱芜271104 [2]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《工业加热》2022年第11期11-14,20,共5页Industrial Heating

摘　　要：精炼渣发泡性能对冶炼过程中埋弧操作和提高钢液保护效果具有重要意义。以国内某钢厂LF精炼过程所取炉渣为研究对象,设计炉渣发泡性实验,分析了底吹氩气流量、精炼工艺操作、熔化温度和黏度的影响以及精炼过程炉渣物相变化。结果表明:底吹流量越大,炉渣发泡指数越高,但不利于炉渣稳定发泡;精炼造渣过程中,应控制炉渣全铁含量在1.0%以下,碱度为2.0左右,(MgO+Al_(2)O_(3))含量为13%~17%和CaF_(2)含量为11%~14%,黏度在0.1~0.114Pa·s,熔化温度在1420~1480℃,以获得较好的精炼渣发泡性能和稳定性。The foaming performance of refining slag is of great significance to the submerged arc operation and the improvement of the protection effect of molten steel in the smelting process.Taking the slag taken from the LF refining process of a domestic steel plant as the research object,the slag foaming experiment was designed,and the influence of bottom blowing argon gas flow,refining process operation,melting temperature and viscosity,and slag phase change during refining were analyzed.The results show that:the larger the blowing flow,the higher the slag foaming index,but it is not conducive to the stable foaming of the slag;the larger the bottom blowing flow,the higher the slag foaming index,but it is not conducive to the stable foaming of the slag;in the process of refining and slagging.The total iron content of the slag should be controlled below 1.0%,the basicity is about 2.0,the content of(MgO+Al_(2)O_(3)) is 13%~17%,the content of CaF_(2) is 11%~14%,the viscosity is 0.1~0.114 Pa·s,and the melting temperature is 1420~1480℃to obtain better foaming performance and stability of refined slag.

关 键 词：LF精炼 炉渣发泡性 底吹流量 熔化温度 炉渣成分 

分 类 号：TF769.2[冶金工程—钢铁冶金]