Corundum-mullite bricks capable of being used under high temperature and production method thereof

A technology for mullite bricks and high temperature, applied in the direction of ceramic molding machines, manufacturing tools, etc., can solve the problem of shortening the service life of high-temperature furnaces, high-temperature hot blast stoves, corundum mullite brick cracks and peeling, and shortening the life of corundum mullite bricks. Life and other issues, to achieve the effect of preventing cracks and peeling, enhancing hardness and prolonging service life

Inactive Publication Date: 2017-08-18
辉县市东方耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional corundum mullite bricks contain a certain amount of clay binder, which can easily cause cracks and peeling of corundum mullite bricks during high temperature and cooling process, shorten the service life of corundum mullite bricks in use, and shorten the high temperature melting process. The service life of the kiln and high-temperature hot blast furnace, and the current processing cost of corundum mullite bricks is relatively high

Method used

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  • Corundum-mullite bricks capable of being used under high temperature and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: A corundum mullite brick for high temperature, containing the following raw materials in parts by weight, 10 parts of fused white corundum granules, 5 parts of fused white corundum fine powder, fused mullite granules 10 parts of material, 5 parts of fused mullite fine powder material, 5 parts of alumina powder, and 10 parts of kaolin.

[0022] The particle size of the fused white corundum granules and the fused mullite granules are both between 10 and 20 mesh, and the particle sizes of the fused white corundum fine powder and the fused mullite fine powder are both 300 mesh. Between ~350 mesh, the alumina powder is a high-purity alumina modified fine powder with a particle size of less than 625 mesh, and the kaolin is a bonded clay with a particle size of less than 200 mesh.

[0023] The above-mentioned production method of corundum mullite bricks for high temperature includes the process steps of mixing and grinding of raw materials, back-rolling of trapped m...

Embodiment 2

[0029] Embodiment 2: The production method of this embodiment is exactly the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that a kind of high-temperature corundum mullite brick contains the following raw materials in parts by weight, 20 parts of fused white corundum granules, 10 parts of fused white corundum fine powder, 20 parts of fused mullite granules, 10 parts of fused mullite fine powder, 20 parts of alumina powder, and 20 parts of kaolin.

Embodiment 3

[0030] Embodiment 3: The production method of this embodiment is exactly the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that a kind of corundum mullite brick for high temperature contains the following raw materials in parts by weight, 12 parts of fused white corundum granules, 6 parts of fused white corundum fine powder, 18 parts of fused mullite granules, 9 parts of fused mullite fine powder, 10 parts of alumina powder, and 16 parts of kaolin.

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Abstract

The invention discloses corundum-mullite bricks capable of being used under high temperature. The corundum-mullite bricks comprise, by weight, 10-20 parts of fused white corundum granule, 5-10 parts of fused white corundum fine powder, 10-20 parts of fused mullite granule, 5-10 parts of fused mullite fine powder, 5-20 parts of alumina powder and 10-20 parts of kaolin. A production method of the corundum-mullite bricks includes: mixing and grinding raw materials, performing aging and back grinding, performing compression molding, sintering to obtain finished-product bricks and the like. Green bricks obtained after the compression molding are subjected to sintering and heat preservation under 1450-1500 DEG C in a high-temperature tunnel kiln for 10-20 hours, naturally cooled for 48-52 hours and discharged from the kiln to obtain the finished-product bricks. The produced corundum-mullite bricks have the advantages that the hardness, melting point, high-temperature strength, erosion resistance, thermal shock resistance, peeling off resistance and wear resistance of the bricks can be increased evidently, cracking and peeling off during high temperature and cooling can be prevented, and the service life of the corundum-mullite bricks is prolonged.

Description

[0001] Technical field: [0002] The invention relates to a corundum mullite brick for high temperature and a production method thereof, belonging to the technical field of refractory materials. [0003] Background technique: [0004] Corundum mullite brick refers to refractory products with alumina content greater than 90% and corundum as the main crystal phase. It has high compressive strength at room temperature, high load softening start temperature, and good chemical stability. It has strong resistance to acid or alkaline slag, metal and glass liquid, and is widely used in various high-temperature kiln linings and kiln furniture in petrochemical and fertilizer industries, reforming furnaces, and metallurgical industries. Traditional corundum mullite bricks contain a certain amount of clay binder, which can easily cause cracks and peeling of corundum mullite bricks during high temperature and cooling process, shorten the service life of corundum mullite bricks in use, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101B28B3/00B28B11/24
CPCB28B3/00B28B11/243C04B35/101C04B2235/3463C04B2235/349C04B2235/77C04B2235/96
Inventor 马金奎王玉付李小慧
Owner 辉县市东方耐火材料有限公司
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