作者：YU Renhong1LIU Ping1LIU Pengcheng1CHEN Weihao1GAO Jianying2LI Jiwei3
作者單位：1. Henan University of Science and Technology 2. Imerys Aluminates(China) 3. Henan Higer High Temperature Materials Co.,Ltd.
刊名：China’s Refractories
ISSN：1004-4493
出版年：2018-12-15
卷：27
期：4
起頁：1-5
止頁：
分類號：TQ175.732
語種：英文
關鍵詞：
內容簡介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 spinel. The effects of different ultrafine spinel sources（ CMA72,spinel micro-powder） on the properties of alumina-spinel castables were investigated. Thermal shock resistance and slag resistance of specimens were compared by the residual strength rate（ 1 100 ℃,air cooling 1 cycle） and static crucible method. The microstructure and the slag corrosion resistance mechanism of the specimens were analyzed by SEM and EDS. The result shows that slag resistance of alumina-spinel castables can be improved by adding ultrafine preformed spinel,such as CMA72,and spinel micro-powder. The introduction of ultra-fine preformed spinel has little effect on HMOR of alumina-spinel castables,but has negative effect on TSR. ultra-fine and dispersive preformed spinel in the matrix and fine microstructure are the main reasons for the improvement of slag resistance of castables.
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