关键词: 铁沟;Al2O3-SiC-C质浇注料;硅微粉;水泥

Abstract: The lower high temperature performance of Al2O3-SiC-C castables for blast furnace trough is mainly related to the additions of cement and microsilica powder.The effect of microsilica powder and cement content on the strength of the castables was investigated using brown corundum, silicon carbide as main raw materials.The results show that using high alumina 80 cement instead of the original 70 cement and reducing the addition amount,could improve the hot modulus of rupture significantly without decreasing the coldstrength due to the formation of the well-developedmullite crystal.The technology was applied to a blast furnace of 1080 m3 capacity.The iron influx was increased by 38 thousand tons and a good effect was achieved.

Key words: iron trough;Al2O3-SiC-C casting material;micro-silica powder;cement