The invention relates to a special sand mold
coating material produced from
alumina powder as a main
raw material. The technical scheme is as follows: the special sand mold
coating material comprisesthe following raw materials by weight: 5.3kg to 6.7kg of water, 10.75kg to 14.75kg of
alumina powder, 6g to 10g of
xanthan gum and 38g to 42g of
polyethylene. According to the special sand mold
coating material, the production cost of an electrically-fused
brick sand mold coating material is greatly reduced, and the coating material cost of electrically-fused bricks per
ton can be saved by about 200 RMB; the
alumina powder has refractoriness capable of reaching 2,010 DEG C to 2,050 DEG C, and thus, the requirements of high-temperature resistant
coating materials of electrically-fused
brick sand molds on high-
temperature resistance can be met; the market price of the alumina powder per
ton is 3,200 RMB, and the use cost of the coating material can be greatly reduced as the electrically-fused
brick sand mold coating material; and by using the alumina powder as the sand mold coating material, the fitness is higher, a layer of crust is formed after the coating material is sintered, thus, gas generated from resin
combustion is prevented from polluting brick faces, crusts formed by the coating material at high temperatures will successfully and naturally fall off during brick discharging, the brick faces are more convenient in cleaning, and the efficiency of cleaning of the brick faces is increased.