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.
出处
《武汉科技大学学报》
CAS
2012年第6期415-421,共7页
Journal of Wuhan University of Science and Technology
关键词
VOD
精炼渣
熔化温度
脱氧
脱硫
成分优化
VOD
refining slag
melting temperature
deoxidation
desulfurization
composition optimization
作者简介
李伟（1985-），男，武汉科技大学硕士生．E—mail：li_weil985@126．com
通讯作者：李光强（1963-），男，武汉科技大学教授，博士生导师．Email：ligqwust@wust．edu．cn
