Alumina Magnesia Carbon (hereinafter AMC) bricks are widely used in metal zone of steel ladle. Graphite, by virtue of its non-wetting characteristics, constitutes an essential element of such bricks. This provides the erosion resistance against liquid metal. Being a high thermal conductivity bearing material, graphite increases the thermal conductivity of the brick. This undoubtedly improves the spalling resistance of the brick but an increased thermal conductivity of the lining causes a drop in temperature of the liquid steel and gives rise to the problems of subsequent "return heats". The present paper describes the development of a novel AMC brick which shows a lower thermal conductivity with uniquely attained micro pores taking care of the spalling resistance. The newly developed AMC brick has been manufactured commercially at our China operations. Supplies were made to a steel plant in Canada for using in their ladle of 140 Ton capacities and have shown encouraging life.
展开▼
