Magnesia-alumina-carbon basic bricks for ladle

摘要

The present invention relates to a magnesia-alumina-carbon basic brick for ladle, the particle size of 3-1mm electrolytic magnesia clinker 27-29wt%, the particle size of 1mm or less electrolytic magnesia clinker 29-31wt%, fine sintered magnesia clinker 4-6wt %, 12-14wt% of 3-1mm electrolytic alumina, 9-11wt% of electrolytic alumina of 1mm or less in particle size, 100wt% of raw material consisting of 6-8wt% of fine electrolytic alumina, 6-8wt% of 85% graphite, and aluminum It is composed of additives composed of 1-3wt%, 0.5-2wt% of silicon, 0.5-2wt% of carbon powder and binder of 3-4wt% of binder phenolic resin, which is a mechanical condition that is especially required for fire bricks applied to ladle walls or floors. In order to give strength and wear resistance, high residual expansion, thermal shock resistance and structural stability, the raw materials and various additives are selected and added, and the spalling property, which is a disadvantage of magnesia carbonaceous brick, is improved, and high residual linear expansion property is provided. The effect is given.