不同熔渣下铝镁质材料渣蚀机理研究  

Influence of different fused slag on corrosion mechanism of alumina-magnesia based refractories

作　　者：顾华志[1] 汪姣[1] 汪厚植[1] 刘光明[2] 李继铮[2] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081 [2]武汉钢铁(集团)公司,湖北武汉430083

出　　处：《武汉科技大学学报》2008年第3期250-254,共5页Journal of Wuhan University of Science and Technology

摘　　要：选取冶炼取向硅钢和铝镇静钢的精炼终渣及钢包用铝镁质材料,采用静态坩埚法于1 600℃×3 h下进行熔渣侵蚀试验,对渣蚀后试样作显微结构分析,并测定熔渣的化学成分、熔化温度及黏度。结果显示,随着熔渣中wAl2O3的升高和碱度的增大,熔渣的熔点升高,黏度增大。黏度较大的熔渣与耐火材料接触后扩散较慢,对耐火材料的熔损和渗透减弱。当熔渣与耐火材料反应形成较多的高熔点CA2,CA6和MA尖晶石相且连续交错分布时,耐火材料表面粗糙度增大,浸润加剧。钢包循环使用,熔渣与耐火材料进行新一轮的渗透与溶解,最终侵蚀得到抑制,呈现粘渣状态。The penetration and corrosion resistance of the alumina-magnesia based refractories used for ladle by two kinds of the refining final slag from the grain-oriented steel and aluminum killed steel at 1 600℃× 3 h were investigated by SEM analysis using static corrosion test. The melting points, chemical composition, and viscosity of the slag were identfied. The results show that the melting points and viscosity of the fused slag increase with the increase in AlcOa content and alkalinity of the fused slag. The fused slag diffuses slowly, and has low penetration and corrosion rate when the high viscosity slag reacts with the alumina-magnesia based refractories. If the reaction product forms as high melting point CA2, CA6 and MA spinel in a continuous solid phase, the surface of refractories becomes rougher, the penetration of slag becomes greater, which would depress the further corrosion of the fused slag in the brick with slag adhibition.

关 键 词：熔渣 铝镁质材料 黏度 显微结构 抗渣性 

分 类 号：TF065.11[冶金工程—冶金物理化学]