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...

AI Technical Summary

Problems solved by technology

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. 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 pungent smell. At the same time, the emitted carbon dioxide gas can erode the surface of the brick to a depth of 10-30mm, and will form dense closed pores on the surface of the brick, which will affect the performance of the fused brick in the glass kiln. Whether it is environmental factors or quality defects, the adhesive of furan resin sand mold needs to be improved urgently

[0004] The birth of the new water glass curing agent silicon phosphate solves most of the above defects, but the initial setting time of the water glass curing agent silicon phosphate is about 2 hours, and the final setting time is about 5.5 hours. The initial setting time is too slow, and the mold release time is long. Seriously affect the production efficiency of sand molds. This is a fatal defect of using silicon phosphate curing agent in electric fused brick water glass sand molds. Therefore, it is necessary to improve the initial setting time of silicon phosphate curing agent to achieve the purpose of improving sand mold production efficiency.