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Environment-friendly magnesia-alumina-carbon brick

A type of magnesia-alumina-carbon brick, magnesia-carbon brick regeneration technology, applied in the field of new refractory brick formula, can solve the problems of unfavorable high-temperature industry energy saving and consumption reduction, thermal shock resistance needs to be improved, poor structural density, etc., to achieve production costs Low, uniform and dense internal structure, reduced thermal conductivity

Inactive Publication Date: 2020-12-15
常州宇达耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional magnesia-alumina-carbon bricks have strong corrosion resistance and are not easy to peel off because of their high carbon content, but usually have poor structural density and thermal shock resistance needs to be improved
Magnesia-alumina-carbon bricks are currently mainly used in the molten pool and bottom of large-scale continuous casting tundishes and refining ladles outside the furnace. Because of their high thermal conductivity, it is easy to cause excessive heat loss, which is not conducive to energy saving and consumption reduction in high-temperature industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] An environment-friendly magnesia-aluminum-carbon brick, which consists of the following components in parts by mass: 40 parts of magnesia particles, 7 parts of magnesia fine powder, 20 parts of regenerated magnesia-carbon brick powder, 15 parts of aluminum-zinc metal composite powder, two 3.5 parts of silicon oxide micropowder, 2 parts of colorless corundum fine powder, 3 parts of complex magnesium-aluminum adhesive, 0.15 part of washing oil, 4 parts of prefabricated carbon black, 2.5 parts of silicon carbide micropowder, and 1 part of nano-carbon. The average particle diameter of the silicon dioxide micropowder and silicon carbide micropowder is 100-200 μm.

Embodiment 2

[0015] An environment-friendly magnesia-alumina-carbon brick, which consists of the following components in parts by mass: 35 parts of magnesia particles, 5 parts of magnesia fine powder, 10 parts of aluminum-zinc metal composite powder, 2 parts of silica micropowder, colorless 1 part of corundum fine powder, 2 parts of complex magnesium-aluminum adhesive, 0.1 part of washing oil, 3 parts of prefabricated carbon black, and 2 parts of silicon carbide micropowder. The particle size of the regenerated magnesia-carbon brick powder is less than 100 μm. The average particle diameter of the silicon dioxide micropowder and silicon carbide micropowder is 100-200 μm.

Embodiment 3

[0017] An environment-friendly magnesia-alumina-carbon brick, which is composed of the following components in parts by mass: 45 parts of magnesia particles, 10 parts of magnesia fine powder, 20 parts of aluminum-zinc metal composite powder, 5 parts of silica micropowder, colorless 3 parts of corundum fine powder, 4 parts of complex magnesium-aluminum adhesive, 0.2 parts of washing oil, 5 parts of prefabricated carbon black, and 3 parts of silicon carbide micropowder. The particle size of the regenerated magnesia-carbon brick powder is less than 100 μm. The average particle diameter of the silicon dioxide micropowder and silicon carbide micropowder is 100-200 μm.

[0018] The preparation process of the above-mentioned three embodiments is to firstly mix the raw materials evenly, press molding and drying to obtain the finished product.

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Abstract

The invention relates to an environment-friendly magnesia-alumina-carbon brick which is mainly prepared from the following components in parts by mass: 35-45 parts of magnesia particles, 5-10 parts ofmagnesia fine powder, 10-20 parts of aluminum-zinc metal composite powder, 2-5 parts of silicon dioxide micro powder, 1-3 parts of colorless corundum fine powder, 2-4 parts of a complex magnesia-alumina adhesive, 0.1-0.2 part of wash oil, 3-5 parts of carbon black and 2-3 parts of silicon carbide micro powder. According to the magnesia-alumina-carbon brick, the oxidation resistance can be remarkably improved by adding a small amount of wash oil, and the medium-high temperature strength of a magnesia-alumina-carbon brick product can be improved through compatibility of colorless corundum finepowder and silicon carbide; meanwhile, the magnesia-alumina-carbon brick has the advantages of low carbon content and low apparent porosity.

Description

technical field [0001] The invention relates to a formula technology of a novel refractory brick, in particular to an environment-friendly magnesia-alumina-carbon brick. Background technique [0002] Magnesia-alumina-carbon bricks refer to refractory products made of high-alumina bauxite or corundum sand, magnesia and flake graphite as the main raw materials. Traditional magnesia-alumina-carbon bricks have strong corrosion resistance and are not easy to peel off because of their high carbon content, but usually have poor structural density and thermal shock resistance needs to be improved. At present, magnesia-alumina-carbon bricks are mainly used in the molten pool and bottom of large-scale continuous casting tundishes and refining ladles outside the furnace. Because of their high thermal conductivity, it is easy to cause excessive heat loss, which is not conducive to energy saving and consumption reduction in high-temperature industries. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/04C04B35/66
CPCC04B35/04C04B35/62204C04B35/66C04B2235/3217C04B2235/3418C04B2235/3826C04B2235/40C04B2235/402C04B2235/422C04B2235/424C04B2235/5427C04B2235/5436C04B2235/9684
Inventor 陈洪蒋伟瑜蒋丽琴
Owner 常州宇达耐火材料有限公司
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