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Compact anti-erosion reinforced sintered zirconium oxide big brick and production process thereof

A technology of sintered zirconia and production process, which is applied in the field of dense and anti-erosion enhanced sintered zirconia large bricks and its production process, which can solve the problems of cumbersome and complicated process, rising cost of secondary melting and casting zirconia products, and more energy consumption. Achieve the effects of prolonging the cooling time, improving corrosion resistance and cold mechanical strength, and reducing consumption

Active Publication Date: 2015-12-23
RUITAI MATERIALS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Compact anti-erosion reinforced sintered zirconium oxide big brick and production process thereof
  • Compact anti-erosion reinforced sintered zirconium oxide big brick and production process thereof
  • Compact anti-erosion reinforced sintered zirconium oxide big brick and production process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]

[0021] After weighing each raw material, adding water and stirring, pouring and curing, demolding and drying, the firing time is 68 hours, and the maximum firing temperature is 1630°C. The firing curve is: heating stage 24 hours, heat preservation 6 hours, cooling 38 hours. The temperature of the product out of the kiln is 75°C. After the product is cooled, it is placed in a solution of 25% chromium trichloride hexahydrate for 4 times of vacuum salt immersion, and the conventional performance is tested. And the sintered test bar was processed into a 10×10×70mm sample bar, and the corrosion resistance test was carried out in the aluminosilicate glass melt at 1350°C×48h. In the anti-corrosion test, ordinary sintered zirconia bricks were used as reference samples.

[0022] The test results are as follows:

[0023]

[0024]

Embodiment 2

[0026]

[0027] After weighing each raw material, adding water and stirring, pouring and curing, demolding and drying, the firing time is 68 hours, and the maximum firing temperature is 1630°C. The firing curve is: heating stage 24 hours, heat preservation 6 hours, cooling 38 hours. The temperature of the product out of the kiln is 75°C. After the product is cooled, put it into a chromium trichloride hexahydrate solution with a concentration of 25% for vacuum salt immersion 3 times to test its general performance. And the sintered test bar was processed into a 10×10×70mm sample bar, and the corrosion resistance test was carried out in aluminosilicate glass melt at 1350°C×48h. In the anti-corrosion test, ordinary sintered zirconia bricks were used as reference samples.

[0028] The test results are as follows:

[0029]

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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. Zirconia (ZrO 2 ) is a non-renewable scarce resource, and discarded bricks cause a serious waste of resources; 2) reclaiming waste bricks for secondary melting and casting, such as patent No. CN103030412 "Method for Reusing Wasted High Zirconium Bri...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/482C04B41/85
Inventor 魏瀚王杰曾尹超男赵洪亮徐如林周严敦胡建辉王俊涛叶亚红陈雪峰毛利民
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
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