A preparing method for coating color sintered magnesium-aluminum-zirconium refractory bricks

A technology of magnesia-aluminum-zirconium and refractory bricks, which is applied in the field of refractory materials, can solve the problems of insufficient recognition and oxidation resistance of sintered magnesia-aluminum-zirconium refractory bricks, and achieve excellent anti-corrosion performance, macroscopic properties, and inhibition of cracking.

Inactive Publication Date: 2017-01-25
CHANGXING MENGYOU REFRACTORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of insufficient recognition and oxidation resistance of sintered magnesia-aluminum-zirconium refractory bricks, the invention provides a method for preparing coated colored sintered magnesia-aluminum-zirconium refractory bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Weigh 40.3 wt% of Al-Mg spinel, 21.3 wt% of hydromagnesite, 16.3 wt% of magnesia, 8.6 wt% of zircon, 7.2 wt% of xenotime, 2.4 wt% of ilmenite and 3.9 wt% of cuprous oxide %, after heat preservation at 800°C for 3 hours, the heat preservation is completed, and crushed to 60 mesh to obtain a mixture. Weigh 85 wt% of the mixture, 10 wt% of carboxymethyl cellulose aqueous solution (concentration: 5%), and 5 wt% of water, stir and mix evenly, and age for 2 days to obtain a mixed slurry. The mixed slurry was made into bricks using a brick-making mold, and baked at 80° C. for 5 hours to obtain bricks to be fired. The bricks to be fired are kept at 1000°C for 6 hours in an industrial nitrogen atmosphere, but the temperature is raised to 1700°C at a rate of 10°C / min and kept at 9 hours to obtain colored sintered magnesia-aluminum-zirconium refractory bricks. Weigh 25wt% of brucite powder (400 mesh), 8wt% of water glass and 67wt% of water, mix and stir to obtain a coating finishi...

Embodiment 2

[0034] 36.5 wt% Al-Mg spinel, 20.1 wt% hydromagnesite, 15.7 wt% magnesia, 13.6 wt% zircon, 5.7 wt% xenotime, 3.6 wt% ilmenite and 4.8 wt% ferrous oxide %, after heat preservation at 850°C for 3.5 hours, the heat preservation is completed, crushed to 100 mesh, and the mixture is obtained. Weigh 90 wt% of the mixture, 5 wt% of polyvinyl alcohol aqueous solution (concentration: 4%), and 5 wt% of water, stir and mix evenly, and age for 2.5 days to obtain a mixed slurry. The mixed slurry was made into bricks using a brick-making mold, and baked at 82° C. for 5.5 hours to obtain a brick to be fired. The bricks to be fired are kept at 1100°C for 8 hours in an industrial nitrogen atmosphere, but the temperature is raised to 1750°C at a rate of 15°C / min and kept at 8 hours to obtain colored sintered magnesia-aluminum-zirconium refractory bricks. Weigh 30 wt% of bauxite powder (500 mesh), 10 wt% of sodium tripolyphosphate and 60 wt% of water, mix and stir to obtain a coating finishing ...

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Abstract

The invention discloses preparing method for coating color sintered magnesium-aluminum-zirconium refractory bricks, the coating color sintered magnesium-aluminum-zirconium refractory bricks are made of a mixture, a binder and a coating agent. The method comprises the steps of 1, preparing the mixture; 2, preparing the mixed slurry; 3,burning brick; 4,Color sintered magnesia alumina zirconia refractory bricks; 5, finishing tiles; 6) coating tiles; 7) coating color sintered magnesium-aluminum-zirconium refractory bricks. The coated color sintered magnesium aluminum-zirconium refractory bricks prepared by the present invention realizes the coloring of the sintered magnesium aluminum-zirconium refractory bricks, which are an important supplement to the achromatic sintered magnesia-alumina refractory bricks and characterized by the durability of anti-oxidation, high temperature, anti-erosion, wear resistance, low thermal conductivity and excellent thermal shock stability and so on.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to a method for preparing a coated colored sintered magnesia-aluminum-zirconium refractory brick. Background technique [0002] Magnesium-aluminum-zirconium refractory brick is a kind of basic refractory material. It was used as the lining material of steelmaking converter in the late 1980s, and it has been greatly developed. Since the beginning of this century, with the rapid development of stainless steel and clean steel production in China, especially the decline in steel prices, magnesium-aluminum-zirconium refractory bricks have been widely used for their low price and excellent quality. [0003] Magnesium-aluminum-zirconium refractory brick has a refractoriness of 1920°C, a load softening temperature of more than 1500°C, a thermal shock resistance of 1100°C cold water for more than 25 times, good alkali resistance, and a maximum service temperature of more than 1600°C. At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B41/87
CPCC04B35/66C04B41/009C04B41/5031C04B41/87C04B2235/3206C04B2235/3222C04B2235/3225C04B2235/3232C04B2235/3244C04B2235/3272C04B2235/3281C04B2235/3427C04B2235/9661C04B41/5029C04B41/4539C04B41/0072
Inventor 佘玉明
Owner CHANGXING MENGYOU REFRACTORIES
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