Properties of Castables Made of Spherical Lightweight Mullite Aggregates

作     者：ZHAO Hua ZHAO Fei ZHANG Qianqian GE Tiezhu 

作者机构：High Temperature Ceramic InstituteZhengzhou UniversityZhengzhou 450052China Henan Key Laboratory of High Temperature Functional CeramicsZhengzhou UniversityZhengzhou 450052China 

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

年 卷 期：2019年第28卷第3期

页      面：22-26页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：spherical lightweight mullite aggregates castable thermal conductivity 

摘      要：The castables were prepared from spherical lightweight mullite aggregates,bauxite,SiO2 fine powder,α-Al2O3 fine powder and calcium aluminate *** performance changes of the castables were studied after heat treatment at 110℃for 24 h,1100℃for 3 h,1200℃for 3 h and 1300℃for 3 *** results illustrate that the cold modulus of rupture and hot modulus of rupture of the castable increase with the rising heat treatment *** cold crushing strength shows a“Vchange trend when the heat treatment temperature rises from 1100 to 1300℃.After the specimen is heat treated at 1300℃,the thermal conductivity is 0.500 W·m-1·K-1,0.586 W·m-1·K-1,0.595 W·m-1·K-1 at 300,600 and 900℃,*** SEM analysis explains the change trends of these *** prepared lightweight mullite castables can be applied as the working lining of hot-blast furnaces.