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Mullite composite refractory brick and preparation method and application thereof

A technology of mullite and refractory bricks, which is applied in the field of mullite composite refractory bricks and their preparation, can solve the problems of anode carbon block production, low softening point under load, poor thermal shock stability, etc. Improved service life and strong slag resistance

Inactive Publication Date: 2016-12-21
济源市金峰耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In my country's current market, although the production of refractory materials for carbon roasting furnaces is very common, no matter whether it is clay refractory materials, high-alumina refractory materials or general creep refractory materials, there are low softening points under load, Shortcomings such as poor thermal shock stability and high creep rate after long-term use will lead to premature deformation and damage of the flue wall, and the production of anode carbon blocks will be greatly affected

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  • Mullite composite refractory brick and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0027] This embodiment provides a mullite composite refractory brick, which includes aggregate, fine material and pulp water, wherein the quality of the pulp water is 4.5% of the total mass of the aggregate and the fine material; the The aggregate and the fine material include the following raw materials in mass percentages: bauxite clinker large particles 10%, mullite large particles 21%, sillimanite small particles 14%, mullite small particles 15%, kaolin Micro powder 8%, mullite fine powder 32%.

[0028] Wherein, the particle size of the large bauxite clinker particles is 1 mm to 3 mm, the particle size of the large mullite particles is 1 mm to 3 mm, the particle size of the small mullite particles is less than 1 mm, and the The particle size of the small sillimanite particles is less than 1 mm, the particle size of the kaolin fine powder is less than 0.043 mm, and the particle size of the mullite fine powder is less than 0.074 mm. The chemical composition of each raw mate...

Embodiment 2

[0037] This embodiment provides a mullite composite refractory brick, the specific raw material composition is roughly the same as that of Embodiment 1, the difference is that in this embodiment, the quality of the pulp water is the total of the aggregate and the fine material. 5% of the mass, the aggregate and the fine material include the following mass percentages of raw materials: bauxite clinker large particles 5%, mullite large particles 26%, sillimanite small particles 10%, mullite Stone small particles 19%, kaolin fine powder 5%, mullite fine powder 35%.

[0038] The preparation method of the mullite composite refractory brick described in this example is roughly the same as the preparation method in Example 1, the difference is that the mixed mud is pressed into bricks, and then the bricks are put into the tunnel Dry in a tunnel-type drying tunnel for 30 hours, wherein the inlet temperature of the tunnel-type drying tunnel is controlled at 60°C and the outlet temperat...

Embodiment 3

[0041] This embodiment provides a mullite composite refractory brick, the specific raw material composition is roughly the same as that of Embodiment 1, the difference is that in this embodiment, the quality of the pulp water is the total of the aggregate and the fine material. 5.5% of the mass, the aggregate and the fine material include the following raw materials in mass percentages: bauxite clinker large particles 15%, mullite large particles 16%, sillimanite small particles 10%, mullite Stone small particles 19%, kaolin powder 6%, mullite fine powder 34%.

[0042] The preparation method of the mullite composite refractory brick described in this example is roughly the same as the preparation method in Example 1, the difference is that the mixed mud is pressed into bricks, and then the bricks are put into the tunnel Drying in a tunnel-type drying hole for 24 hours, wherein the inlet temperature of the tunnel-type drying hole is controlled at 60°C and the outlet temperature...

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Abstract

The invention provides a mullite composite refractory brick which comprises a main material and an additive; the main material comprises the following raw materials by the mass percentage: 5%-15% of large bauxite clinker particles, 15%-30% of large mullite particles, 10%-20% of small sillimanite particles, 10%-30% of small mullite particles, 5%-15% of a kaolin micro-powder, and 15%-35% of a fine mullite powder; the mass of the additive is 4.5%-5.5% of the mass of the main material. The invention also provides a preparation method and an application of the mullite composite refractory brick. The mullite composite refractory brick is reasonable in composition collocation, has the advantages of good thermal shock property, relatively good thermal stability, and relatively high refractoriness under load, so as to improve the service life of a carbon roasting furnace using the bauxite composite refractory brick for constructing a flue wall.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a mullite composite refractory brick and its preparation method and application. Background technique [0002] In the modern carbon industry, it is very common to use a roaster to produce anode carbon blocks. The main task of the carbon roaster is to roast anode carbon blocks for electrolytic aluminum. The flue wall of the roasting furnace in the prior art is made of clay bricks, the fuel is burned in the flue, and the heat is transferred to the anode carbon block in the adjacent material box through the high-load andalusite composite refractory brick material, and the anode carbon block Roast in an atmosphere without contact with flames. Therefore, in addition to long-term high temperature and high pressure in the anode roasting furnace, refractory materials must also withstand periodic temperature changes. Therefore, the requirements for refractory mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/66C04B35/622F27D1/06
CPCC04B35/185C04B35/622C04B35/66C04B2235/3217C04B2235/3463C04B2235/349F27D1/063
Inventor 王法河贺延奎
Owner 济源市金峰耐火材料有限公司
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