关键词: 红柱石;铝硅质;性能影响;引入方式

Abstract: To explore the excellent performance of andalusite in alumina-silica castables fully,respectively using super-grade bauxite,brown corundum as the main raw material andalusite aggregate and fines to make alumina-silica castables.The modulus of rupture,density,apparent porosity and linear expansion rate of specimens at different temperatures were tested.It~ for studying the effect of andalusite and its introduction on the properties of different alumina-silica castables.The results show that andalusite in the form of a fine powder into aluminium silicon castables have more fully reaction on mullitization and the secondary mullitization.They also peform the higher bulk density,HMOR and the lower linear expansion rate relatively;Compared with brown corundum castable,the effect of andalusite on bauxite castable properties is more significant.The decomposition of andalusite and the secondary mullitization is relatively easier,the tightly bonding between mullite and bauxite chamotte can improve the comprehensive physical properties of the specimens.

Key words: andalusite;alumina-silica castable;effect on performance;method of introduction