Sodium silicate curing agent and fused zirconia-corundum brick sand mold material prepared from same

Abstract

The invention discloses a sodium silicate curing agent and a fused zirconia-corundum brick sand mold material prepared from the same. The curing agent comprises silicon phosphate and aluminum dihydrogen phosphate powder in a mass ratio of 6-8 to 2-4. According to the sodium silicate curing agent and the fused zirconia-corundum brick sand mold material prepared from the same, the silicon phosphateand the aluminum dihydrogen phosphate are mixed and roasted according to a certain proportion, so that the performance of the curing agent achieves a synergistic effect, the curing time of the sand mold bonding material sodium silicate is finished within required time, a sand mold is good in water resistance, high in strength and good in final collapsibility, can overcome the air hole defect, thewater wave defect and the color defect of the brick surface of a blank brick, and meanwhile, the used materials are environment-friendly pollution-free materials, so that the problem of a severe working environment with pungent smell is solved, experiments prove that the sodium silicate curing agent prepared by the invention can shorten the initial setting time of the sand mold to 20 minutes, thestripping time is 30 minutes, the strength of the sand mold can reach 1.3 Mpa, raw materials are cheap, the cost is low, the manufacturing process is simple, and good social and economic benefits areachieved.

Description

technical field [0001] The invention relates to a water glass curing agent, in particular to a water glass curing agent and an electric fused zirconium corundum brick sand material prepared by using the water glass curing agent. Background technique [0002] At present, the main sand material of fused zirconia corundum bricks is silica sand, the binder is water glass and furan resin, and the curing agent is organic ester and strong acid curing agent. However, because water glass contains metal sodium ions, the strength of the sand mold is lost or deformed due to the absorption of moisture in the air, and the material cost of the self-hardening water glass sand mold in the production process is high, and there are many production links, and at the same time, there are water marks on the surface of the rough brick. Defects reduce the quality of fused bricks, so the use of water glass is limited. [0003] When the furan resin sand mold is cast at high temperature, it emits a p...