Effect of Ultrafine Spinel Sources on Slag Resistance and Microstructure of Alumina-spinel Castables

作     者：YU Renhong LIU Ping LIU Pengcheng CHEN Weihao GAO Jianying LI Jiwei 

作者机构：Henan University of Science and TechnologyLuoyang 471003China Imerys Aluminates (China)Tianjin 300457China Henan Higer High Temperature Materials Co.Ltd.Luoyang 471000China 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2018年第27卷第4期

页      面：1-5页

学科分类：0817[工学-化学工程与技术] 08[工学] 

基　　金：the financial support from the National Natural Science Foundation of China(Grant no.51402089) the Science and Technology Research Planning Project of Henan Province(Project No.162102210206) the Plan of Young-backbone Teachers of Colleges and Universities in Henan Province(Project No.2015GGJS-045) 

主　　题：alumina-spinel castables ultra-fine spinel CMA72 slag resistance 

摘      要：In order to clarify the effect of ultrafine spinel sources on slag resistance and microstructure of alumina -spinel castables,using tabular alumina and spinel as coarse aggregates,tabular alumina powders,spinel powders,calcium aluminate cement,spinel containing cement,spinel micro-powder and reactive alumina ultrafines as matrix,alumina-spinel castables used for RH snorkels were prepared by changing the particle size and sources of preformed *** effects of different ultrafine spinel sources (CMA72,spinel micro-powder) on the properties of alumina-spinel castables were *** shock resistance and slag resistance of specimens were compared by the residual strength rate (1 100 ℃,air cooling 1 cycle) and static crucible *** microstructure and the slag corrosion resistance mechanism of the specimens were analyzed by SEM and *** result shows that slag resistance of alumina-spinel castables can be improved by adding ultrafine preformed spinel,such as CMA72,and spinel *** introduction of ultra-fine preformed spinel has little effect on HMOR of alumina-spinel castables,but has negative effect on ***-fine and dispersive preformed spinel in the matrix and fine microstructure are the main reasons for the improvement of slag resistance of castables.