保护气氛下电渣重熔过程中界面脱硫传质动力学  

The kinetics of interfacial desulphurization and mass transfer during electroslag remelting in protective atmosphere

作　　者：孙毓磊 吴少鹏 李万明[1] 臧喜民[1] Sun Yulei;Wu Shaopeng;Li Wanming;Zang Ximin(School of Material and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《材料与冶金学报》2020年第1期20-25,共6页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(51974153,51604149,U1560203).

摘　　要：电渣重熔过程中渣金反应温度高,接触面积大,具有良好的脱硫传质条件.然而,渣金界面处存在着传质边界层,边界层的厚度会影响界面脱硫传质速率,这对研究界面脱硫传质具有重要的意义.本文基于菲克第二定律、渗透理论和薄膜理论,建立保护气氛条件下电渣重熔过程渣-金界面脱硫传质方程,研究温度对渣-金间脱硫传质速率的影响规律.研究结果表明:随着温度的升高,渣-金界面处硫的浓度减小,界面脱硫传质速率增大;渣-金界面硫扩散的传质边界层厚度不随温度发生变化.During the electroslag remelting process(ESR),the desulfurization and mass transfer are favorable due to the high reaction temperature,and the large contact area between slag and metal.However,the mass transfer boundary layer exists at the slag-metal interface,and its thickness significantly affects mass transfer for desulfurization.Therefore,it is of great significance to study the desulfurization at the slag-metal interface.Based on the Fick’s second law,penetration theory,and thin film theory,the mass transfer equations of desulfurization at the interface were established for ESR process under protective atmosphere,aiming at exploring the effect of temperature on the mass transfer rate for desulfurization process.The results show that sulfur concentration at the slag-metal interface decreases,while the mass transfer rate for desulfurization increases with increasing temperature.Moreover,the boundary layer thickness of sulfur transfer does not change with temperature.

关 键 词：界面传质模型 脱硫 电渣重熔 传质速率 

分 类 号：TF142[冶金工程—冶金物理化学]