VOD精炼渣的熔化过程分析及成分优化  

Melting process and optimal composition of VOD refining slag

作　　者：李伟[1] 李光强[1] 苏丽娟[1] 陈兆平[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]宝山钢铁股份有限公司研究院,上海201900

出　　处：《武汉科技大学学报》2012年第6期415-421,共7页Journal of Wuhan University of Science and Technology

摘　　要：分别采用FactSage软件计算、高温共聚焦激光显微镜在线观察和示差扫描量热(DSC)分析研究CaO-SiO2-Al2O3-MgO-CaF2五元VOD预熔精炼渣的熔化温度,通过热力学计算分析了精炼渣对超纯铁素体不锈钢的脱氧、脱硫能力的影响,对VOD精炼渣的成分进行优化。结果表明,具有合适熔化温度的渣系成分范围是:w(CaO)/w(SiO2)为4,w(Al2O3)为25%～35%,w(MgO)为6%,w(CaF2)为5%;在成分优化的条件下,随着精炼渣中初始Al2O3含量的减少,精炼渣对超纯铁素体不锈钢的脱氧、脱硫能力逐渐增强。The melting temperature of CaO-SiO2-Al2O3-MgO-CaF2 pentary VOD premelted refining slag was investigated by thermodynamic software FaetSage, high temperature confocal scanning laser microscope, and DSC thermal analyzer. The capability of the slag in deoxidization and desulfurization in ultra clean ferritic stainless steel was analyzed by thermodynamic calculation, and optimal composition of VOD refining slag was obtained. The results show that, the composition of refining slag which has a more appropriate melting temperature is w（CaO）/w（Si02）=4, 25%-35% Al2O3, 6% MgO, and 5% CaF2. With the decrease in initial AI~ 03 content in the slag, the capability of the slag in deoxidization and desulfurization in ultra clean ferritic stainless steel grows gradually.

关 键 词：VOD 精炼渣 熔化温度 脱氧 脱硫 成分优化 

分 类 号：TF111.173[冶金工程—冶金物理化学]