Magnesia-alumina-kaolinic basic bricks for ladle

摘要

The present invention relates to a magnesia-alumina-carbonaceous basic brick for ladle, comprising 27 to 29 wt% of a granulated clay mineral with a particle size of 3 to 1 mm, a granulated clay mineral with a granular size of 1 mm or less and 29 to 31 wt% % Of a raw material composed of 12 to 14 wt% of fused alumina, 9 to 11 wt% of fused alumina having a particle size of 1 mm or less, 6-8 wt% of fine alumina of fused alumina and 6-8 wt% of graphite of 85% Which is composed of an additive comprising 1 to 3 wt% of silicon, 0.5 to 2 wt% of silicon and 0.5 to 2 wt% of carbon powder, and a binder of 3 to 4 wt% of binder phenolic resin, The raw material and various additives are selected and added in order to impart mechanical strength and abrasion resistance, high residual expansion property, thermal shock resistance and structural stability, to improve the spalling property which is a disadvantage of the magnesia-carbonaceous brick, Granted to that effect.