Improvement Lifetime of Trough Cover by Using Al_2O_3-SiC-C Castables

摘要

Trough cover is applied in stopping from molten iron spray and protecting workers. Refractories used on trough cover must possess good corrosion resistance and thermal shock resistance at 1500-1800℃ service condition. The lifetime of high-alumina castables is about 20 days in main trough of China Steel Co. In this study, Al_2O_3-SiC-C castables were proposed by replacing high-alumina castables. It showed that the modulus of rupture (MOR) is 47 kg·cm~2 after subjected to 6 cycles of thermal shock tasting (1000℃, water quenched) and the lifetime can be prolonged to 37 days.