High-purity low-creep-deformation electrofused mullite brick and preparation method thereof

A technology of fused mullite and mullite bricks, which is applied in the field of refractory materials, can solve the problems of high impurity content, unusability, and reduced high-temperature performance, and achieve the effects of ensuring the purity of raw materials, improving bonding strength, and ensuring molding performance

Active Publication Date: 2018-04-20
ZIBO GT INDAL CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the use of clay, kyanite, titanium oxide, and natural quartz raw materials, the impurity content is high, and a large number of low-temperature glass phases are produced at high

Method used

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  • High-purity low-creep-deformation electrofused mullite brick and preparation method thereof
  • High-purity low-creep-deformation electrofused mullite brick and preparation method thereof
  • High-purity low-creep-deformation electrofused mullite brick and preparation method thereof

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Embodiment 1-7

[0037] The high-purity and low-creep fused mullite bricks are composed of the types, particle sizes and weight percentages of raw materials as follows:

[0038] Table 1

[0039]

[0040]

[0041] The preparation method of the described high-purity low-creep fused mullite brick comprises the following steps:

[0042] (1) pre-mixing high-temperature alumina micropowder and fused silica micropowder wet co-grinding to obtain pre-grinding dry powder, and the grinding medium used is alumina grinding ball;

[0043] (2) Semi-dry mixing: use a wheel-rolling mixer, first put the fused mullite particles with a particle size of 0.1mm or more into the wheel-rolling mixer and mix evenly, then add PVA solution and mix evenly, Then add fused mullite fine powder with a particle size of ≤0.045mm, the pre-ground dry powder and cellulose dry powder obtained in step (1) to the cone mixer, and mix for 10-20 minutes to prepare semi-dry mud , put it into the molding press silo to trap the mat...

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Abstract

The invention specifically relates to a high-purity low-creep-deformation electrofused mullite brick and a preparation method thereof, belonging to the technical field of refractory materials. The high-purity low-creep-deformation electrofused mullite brick comprises the following raw materials: 5 to 15% of electrofused mullite with a particle size of 3.35 to 2 mm, 20 to 30% of electrofused mullite with a particle size of 2 to 0.85 mm, 25 to 35% of electrofused mullite with a particle size of 0.85 to 0.1 mm, 20 to 30% of electrofused mullite with a particle size of no more than 0.045 mm, 5 to8% of alpha-alumina micropowder with a particle size of no more than 0.005 mm, 1 to 4% of fused silica micropowder with a particle size of no more than 0.005 mm, and an external organic binding agentaccounting for 0.1 to 5% of the total weight of the above raw materials. The high-purity low-creep-deformation electrofused mullite brick provided by the invention is extremely low in impurity content, high in softening-point temperature under load, good volume stability at high temperature and low creep rate at high temperature. The invention also provides the preparation method which is simple,practicable, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a high-purity and low-creep fused mullite brick and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] The new generation of special glass melting furnaces generally adopt the oxy-fuel combustion technology with the characteristics of energy saving and emission reduction. The temperature of the flame space of the furnace reaches 1600 ℃ or above. The high-quality silica bricks usually used in glass furnaces are no longer safe to use. [0003] Chinese patent application 201010171542.7 (CN 101817676B) discloses a low-creep fused mullite brick and its manufacturing method. The manufacturing method is: using high-quality fused mullite raw materials together with calcined alumina raw materials, kaolin and water Adding to a grinder for fine grinding, sieving, drying, grinding and sieving again to obtain matrix powder; 60wt%-75wt% fused mullite granules are mixed with 4...

Claims

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Application Information

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IPC IPC(8): C04B35/185C04B35/66C04B35/626C04B35/634
CPCC04B35/185C04B35/6261C04B35/62685C04B35/63416C04B35/63452C04B35/66C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3232C04B2235/3272C04B2235/608C04B2235/77C04B2235/96
Inventor 张晓峰孙文礼李玉强张瑛李志军郑飞
Owner ZIBO GT INDAL CERAMICS
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