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High-strength thermal-shock-resisting light heat-insulting fireproof brick and preparation method thereof

A light-weight heat insulation and thermal shock-resistant technology, applied in the field of new refractory materials, can solve the problems of poor shock resistance and short service life of heat-insulating refractory bricks, and achieve poor shock resistance, long service life and stable high temperature resistance Effect

Inactive Publication Date: 2015-04-22
平顶山新型耐材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to develop a high-strength thermal shock-resistant lightweight heat-insulating refractory brick to solve the technical problems of poor shock resistance and short service life of the heat-insulating refractory brick

Method used

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preparation example Construction

[0019] A method for preparing a high-strength heat-shock-resistant lightweight heat-insulating refractory brick, comprising the following steps:

[0020] (1) Take mullite lightweight aggregate, α-AL 2 o 3 Micropowder, fused mullite powder, talc powder, kaolin powder, and then adding nano-SiO 2 powder, put the raw materials with a good ratio into a horizontal mixer for mixing, add 3-4 parts of water and binder during the mixing process, stir well, and set aside;

[0021] (2) Form the stirred material through a 160T CNC vibration forming machine;

[0022] (3) Send the shaped bricks into the tunnel dryer and dry them at a constant speed at 40-120°C;

[0023] (4) Put the dried bricks into columns and put them on the kiln car and send them to an intelligent high-temperature tunnel kiln at 1550±10°C for firing, and the finished product will be obtained after natural cooling.

[0024] The invention adopts the technical route of independent innovation, scientific particle gradati...

Embodiment 1

[0027] A high-strength heat-shock-resistant lightweight heat-insulating refractory brick. The raw materials are composed of 50 parts of mullite lightweight aggregate, α-AL 2 o 3 8 parts of fine powder, 12 parts of fused mullite powder, 18 parts of talc powder, 5 parts of kaolin powder, nano-SiO 2 2 parts of powder and polyvinyl alcohol whose weight is 0.5% of the total weight of the above components;

[0028] The mullite lightweight aggregate is made of AL 2 o 3 , SiO 2 、TiO 2 , Fe 2 o 3 Spherical particles with a particle size of 0.5mm and a natural bulk density of 0.6g / cm3 after being mixed with water and fired 3 , where the mass percentage of each component is AL 2 o 3 50%, SiO 2 42%, TiO 2 1%, Fe 2 o 3 0.8%.

[0029] The α-AL 2 o 3 In the chemical composition of micropowder: AL 2 o 3 ≥99%, SiO 2 ≤0.25%, Fe 2 o 3 ≤0.05%, and its particle size ≤325 mesh, the chemical composition of the fused mullite powder: AL 2 o 3 ≥71%, SiO 2 20-22%, Fe 2 o 3 ≤...

Embodiment 2

[0036] A high-strength heat-shock-resistant lightweight heat-insulating refractory brick. The raw materials are composed of 53 parts of mullite lightweight aggregate, α-AL 2 o 3 9 parts of fine powder, 13 parts of fused mullite powder, 20 parts of talc powder, 7 parts of kaolin powder, nano-SiO 2 2.2 parts of powder and polyvinyl alcohol whose weight is 0.8% of the total weight of the above components;

[0037] The mullite lightweight aggregate is made of AL 2 o 3 , SiO 2 、TiO 2 , Fe 2 o 3 Spherical particles with a particle size of 2.1mm and a natural bulk density of 0.6-0.7g / cm3 after being mixed with water and fired 3 , where the mass percentage of each component is AL 2 o 3 50-53%, SiO 2 42-46%, TiO 2 1-1.5%, Fe 2 o 3 0.8-1.0%.

[0038] The α-AL 2 o 3 In the chemical composition of micropowder: AL 2 o 3 ≥99%, SiO 2 ≤0.25%, Fe 2 o 3 ≤0.05%, and its particle size ≤325 mesh, the chemical composition of the fused mullite powder: AL 2 o 3 ≥71%, SiO 2 ...

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Abstract

The invention discloses a high-strength thermal-shock-resisting light heat-insulting fireproof brick and a preparation method thereof. The fireproof brick is prepared from the following raw materials in parts by weight: 50-55 parts of a light mullite aggregate, 8-10 parts of alpha-Al2O3 micro-powder, 12-15 parts of electric-melt mullite powder, 18-22 parts of talcum powder, 5-8 parts of kaolin powder, 2-2.5 parts of nanometer SiO2 powder and a binding agent of which the weight is 0.5-1 percent of the total weight of the components. The finished product prepared according to the prescription contains nanometer composite cordierite-mullite common crystal phase components; the problem of poor thermal shock resistance and short service life of the heat-insulating fireproof brick can be effectively solved; the finished product is good in thermal shock resistance, stable in high temperature resistance, resistant to high-temperature creep, capable of effectively preventing drop of bricks and cracking during use, long in service life, high in production efficiency and capable of avoiding huge economic loss of an enterprise due to shutdown maintenance.

Description

technical field [0001] The invention relates to the technical field of new refractory materials, in particular to a heat-shock-resistant and heat-insulating refractory brick for long-term thermal shock erosion and high-temperature industrial furnace lining. Background technique [0002] At present, high-temperature industrial furnaces are increasingly pursuing large-scale, long-life, energy-saving and environmental protection technologies. The special parts of industrial furnace linings such as ceramic roller kiln cooling zone (front end) furnace roof and high temperature tunnel kiln car are subject to thermal shock erosion and rapid temperature changes for a long time, not only need good heat insulation performance, but also need good resistance to rapid cooling Rapid thermal shock stability. Obviously, the existing domestic lightweight clay bricks or lightweight high-alumina bricks cannot meet the technical requirements. Although thermal shock-resistant refractory bricks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 吴德华吉从鹏王芳赵刚吉小池肖晓娜
Owner 平顶山新型耐材股份有限公司
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