A dense anti-erosion reinforced sintered zirconia large brick and its production process

Abstract

The present invention relates to a compact anti-erosion reinforced sintered zirconium oxide big brick and a production process thereof, wherein the big brick comprises 25-50% of zirconium oxide with a particle size of 5-3 mm, 15-34% of zirconium oxide with a particle size of 3-1 mm, 15-35% of zirconium oxide with a particle size of less than 1 mm, 5-18% of desilication zirconium with a particle size of less than 1 mm, 2-7% of industrial alumina with a particle size of less than 1 mm, 0.5-6% of MS97 magnesia with a particle size of less than 1 mm, 0-3% of magnesium oxide with a particle size of less than or equal to 0.088 mm, 0.05-0.1% of additional sodium ethylene polypropylene, and less than or equal to 0.5% of additional sodium hexametaphosphate. The process comprises casting, sintering and brining, wherein the casting comprises material preparing, material mixing, vibration casting and drying, the drying time is 3-5 h, the sintering temperature is 1600-1650 DEG C, the sintering time is 60-80 h, the thermal insulation time is 4-8 h, and the brining comprises preparing chromic chloride hexahydrate into a 10-30% chromium salt solution, and immersing a brick into the salt solution under a vacuum environment 2-5 times. According to the present invention, the product with the large size and the specific shape can be produced, and the good glass liquid corrosion resistance is provided.

Description

technical field [0001] The patent of the present invention relates to a sintered refractory material for a glass kiln and its production process, in particular to a sintered zirconia product produced by sintering technology as raw material of zirconia. Background technique [0002] Fused cast zirconia refractories have good resistance to high temperature erosion and erosion of molten glass for molten glass. Compared with sintered refractory products, the qualification rate of fused cast refractory products is not very high. There will be a certain amount of waste bricks in the production of fused cast zirconia materials. At present, there are two ways to deal with waste high zirconium bricks, 1) directly discarding old bricks. Since zirconia (ZrO 2 ) is a non-renewable scarce resource, and discarded bricks cause a serious waste of resources; 2) Recycling waste bricks for secondary melting and casting, such as the patent number CN103030412 "Method for Reusing Wasted High Z...

AI Technical Summary

Problems solved by technology

This method seems to solve the problem of recycling waste cast zirconia, but it involves multiple processes in the process, and the process is cumbersome and complicated; The process of processing needs to consume more energy, and the cost of producing secondary fused zirconia products increases

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