Medium sized fused brick sand mold coating

Abstract

The invention relates to a medium sized fused brick sand mold coating. The problems of gray blue carbon formation on the surfaces of brick bodies and bonding of sand molds to the surfaces of the brick bodies after casting molding and high cost of fused bricks are effectively solved in the invention. The medium sized fused brick sand mold coating comprises 64-68wt% of a mixed coating and 32-36wt% of water, wherein the mixed coating comprises 68-72wt% of alumina powder, 18-22wt% of silica powder, 1.8-2.2wt% of cryolite, 0.8-1.2wt% of iron oxide powder, 2.8-3.2wt% of bentonite and 3.8-4.2wt% of xanthan gum. A preparation method of the medium sized fused brick sand mold coating concretely comprises the following steps: mixing the alumina powder, the silica powder, cryolite, the iron oxide powder, bentonite and xanthan gum to obtain the mixed coating, adding the mixed coating to water, and uniformly mixing the mixed coating and water to obtain the medium sized fused brick sand mold coating. The above formula of the coating is reasonable, effectively avoids the gray blue carbon formation and pore phenomena on the surfaces of the cast-molded fused bricks and the phenomenon of bonding of the sand molds to the surfaces of the brick bodies, greatly reduces the production cost of the coating, and has good social and economic benefits.

Description

technical field [0001] The invention relates to an electric fused zirconium corundum brick sand coating, in particular to a medium-sized electric fusion brick sand coating. Background technique [0002] In the production of electric fused bricks for more than 20 years in the past, the raw material for casting sand molds is made of silica sand plus 8% to 10% water glass as a binder. The disadvantages of this sand mold are: 1. Only sand boards can be assembled and formed , The regularity of the sand mold is poor; 2. It takes about 16 hours of drying process, and the production efficiency is very low; 3. The expansion coefficient of silica sand is high at high temperature, which has a negative effect on the forming of fused bricks. But there is an advantage that it does not affect the surface color of the brick due to its good dryness and low gas generation, and there are few pores on the surface of the brick. Because the disadvantages of silica sand and water glass sand molds...

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a sand coating for medium-sized electric fused bricks, which can effectively solve the problem of gray-blue carbon deposits on the surface of the brick body after the electric fused brick is cast, and sand-type bonding bricks. surface, and the problem of high cost

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