作者：Satyam Kumar; Ritwik Sarkar

作者單位：Department of Ceramic Engineering, National Institute of Technology, Rourkela, India

刊名：Ceramics International

ISSN：0272-8842

出版年：2024-10-10

卷：50

期：21

起頁：42217-42228

止頁：

分類號：

語種：英文

關鍵詞：Castable;Alumina-spinel;Alumina-magnesia;Cr2O3 addition;Particle size distribution;Spinel content

內容簡介

Alumina-spinel and alumina-magnesia castables are important for steel ladle applications primarily for the bottom and side wall areas respectively. Presence of spinel in alumina castables enhances the resistances against corrosion and thermal shock and improves the performance and service life of the steel ladles. Development of these type of castables is planned in the present study in presence of Cr2O3 as an additive using high alumina cement as binder. Variation in spinel (10 and 20 wt%) and MgO (2.8 and 5.6 wt%) content was also explored, along with two different particle size distributions (q value 0.21 and 0.29) for different flow consistencies. The castable compositions were processed conventionally and evaluated for various refractory properties after heat treatments at 110, 1000 and 1550 °C. Both the castables showed well developed refractory properties with alumina-magnesia castable having better slag resistance due to greater extent of calcium hexa aluminate phase formation protecting the refractory.