镁碳再生料的表征方法及抗侵蚀性研究  

Characterization Methods and Anti-erosion Mechanism of Recycled MgO-C

作　　者：王建筑[1] 赵俊学[1,2] 

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083

出　　处：《硅酸盐通报》2016年第4期1067-1073,共7页Bulletin of the Chinese Ceramic Society

基　　金：钢铁冶金新技术国家重点实验室开放课题基金项目(KF12-09)

摘　　要：采用大结晶镁砂,单质铝粉、鳞片石墨以及三种工艺处理后的镁碳再生料颗粒制作了镁碳材料,研究了镁碳再生料颗粒的表征方法以及添加再生料的镁碳材料性能的影响,结果如下:(1)镁碳再生料的体积密度、化学成份以及分形维数三种表征方法能够准确反映再生料的品位及性能,并呈现良好的一致性;(2)随着添加再生料颗粒分形维数的减小,镁碳材料的致密度逐渐增加,常温强度逐渐增加;添加高速逆流再生料的镁碳材料具有良好的性能;(3)再生料的高气孔率现象会导致镁碳材料的抗侵蚀性降低,但由于再生料颗粒中晶界的杂质减少以及再生料颗粒中的假颗粒更容易形成烧结两个因素的存在,一定程度上提高了材料的抗侵蚀性,因此材料的综合抗侵蚀性降低幅度不大。Samples of MgO-C materials used in ladle were prepared that based on fused magnesia,Al powder,natural graphite and materials from recycled MgO-C brick. The characterization methods of recycled particles and the anti-erosion mechanism of MgO-C brick were researched. The results show that（ 1） quality and performance of recycled materials of MgO-C brick can be characterized by three ways which are bulk density, Chemical composition and fractal dimension,（ 2） the density and cold compressive strength of recycled materials of MgO-C brick is increased with the decrement of the fractal dimension value,the MgO-C brick which is added in high speed countercurrent mixer recycled materials shows the best performance,（ 3） Recycled materials with high porosity will lead to corrosion resistance of MgO-C materials decreased,but because silicate indirect combination into direct combination in magnesia crystal and recycled particles promoting particles sintering and crystal growing up,the total reduce of antierosion performance of MgO-C brick is not large.

关 键 词：镁碳 再生料 表征方法 抗侵蚀性 

分 类 号：TQ175[化学工程—硅酸盐工业]