Slag Resistance of Magnesite-chrome Brick Impregnated with Chrome-bearing Sols  

作　　者：GU Huazhi WANG Houzhi XUE Haitao DENG Yongyue 

机构地区：[1]The Hubei Province Key Laboratory of Refractories and CeramicsMinistry-Province Jointly-Constructed Cultivation Base for State Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, China

出　　处：《China's Refractories》2009年第1期13-16,共4页中国耐火材料（英文版）

基　　金：supported by the Natural Science Foundation of Hubei Province (2007ABA372);the New Century Excellent Talents in University (NCET-06-0676)

摘　　要：Cr2O3 has eminent slag corrosion resistance. So, the magnesite -chrome brick is thought as an important refractory material used in RH refining furnace in the process of steel-making around the world. After chromebearing sols being prepared by sol-gel method, single sol （ Cr（ OH）3） and mixed sol （ Mg（ OH）2 - Cr（ OH）3） were impregnated into magnesite - chrome bricks by vacuum impregnation. The corrosion resistance of the impregnated bricks to silicon steel slag was studied by porosimetric analysis and fractal dimension calculation. The results showed that the corrosion resistance of impregnated magnesite -chrome brick was better than that of the unimpregnated brick and the brick impregnated by MgSO4 solution, and the one which has surface-treated by Mg（ OH）2 -Cr（OH）3 sol was the best, mainly because of lower apparent porosity, smaller pores diameter and their smoother inner sarface.Cr2O3 has eminent slag corrosion resistance. So, the magnesite -chrome brick is thought as an important refractory material used in RH refining furnace in the process of steel-making around the world. After chromebearing sols being prepared by sol-gel method, single sol （ Cr（ OH）3） and mixed sol （ Mg（ OH）2 - Cr（ OH）3） were impregnated into magnesite - chrome bricks by vacuum impregnation. The corrosion resistance of the impregnated bricks to silicon steel slag was studied by porosimetric analysis and fractal dimension calculation. The results showed that the corrosion resistance of impregnated magnesite -chrome brick was better than that of the unimpregnated brick and the brick impregnated by MgSO4 solution, and the one which has surface-treated by Mg（ OH）2 -Cr（OH）3 sol was the best, mainly because of lower apparent porosity, smaller pores diameter and their smoother inner sarface.

关 键 词：Chrome-bearing sol Vacuum impregnation Magnesite -chrome brick Slag resistance 

分 类 号：TQ174.758[化学工程—陶瓷工业] TB332[化学工程—硅酸盐工业]