Bauxite composite refractory brick and preparation method and application thereof

A refractory brick and bauxite technology, applied in the field of refractory materials, can solve the problems of anode carbon block production, low load softening point, poor thermal shock stability, etc., and achieves reasonable composition matching, difficult skeleton structure, and slag resistance. strong effect

Inactive Publication Date: 2016-12-07
济源市金峰耐火材料有限公司
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  • 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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  • Bauxite composite refractory brick and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0025] This embodiment provides a bauxite 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 percentage: 30% of large bauxite clinker particles, 27% of small bauxite clinker particles, 10% of bonded clay fine powder, 28% of bauxite clinker fine powder % and andalusite powder 5%.

[0026] Wherein, the particle size of the large bauxite clinker particles is 1 mm to 3 mm, the particle size of the small bauxite clinker particles is less than 1 mm, the particle size of the andalusite fine powder is less than 0.043 mm, and the combined clay The particle size of the fine powder is less than 0.074mm, and the particle size of the bauxite clinker fine powder is less than 0.074mm. The chemical composition of each raw material is shown in Table 1.

[0027] Table 1, the ...

Embodiment 2

[0035] This embodiment provides a bauxite composite refractory brick, the specific raw material composition is roughly the same as that of Embodiment 1, the difference is that the quality of the pulp water in this embodiment is the total mass of the aggregate and the fine material 5%, the aggregate and the fine material include the following raw materials in mass percentages: bauxite clinker large particles 31%, bauxite clinker small particles 28%, combined clay fine powder 15%, bauxite Soil clinker fine powder 20% and andalusite fine powder 6%.

[0036] The preparation method of the bauxite composite refractory brick described in this example is roughly the same as the preparation method in Example 1, the difference is that the mixed and milled mud is pressed into bricks, and then the bricks are put into the tunnel Drying in a tunnel-type drying tunnel for 24 hours, wherein the inlet temperature of the tunnel-type drying tunnel is controlled at 60°C and the outlet temperature...

Embodiment 3

[0039] This embodiment provides a bauxite 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 mass percentages of raw materials: bauxite clinker large particles 30%, bauxite clinker small particles 27%, combined clay fine powder 20%, aluminum Bauxite clinker fine powder 18% and andalusite fine powder 5%.

[0040]The preparation method of the bauxite composite refractory brick described in this example is roughly the same as the preparation method in Example 1, the difference is that the mixed and milled mud is pressed into bricks, and then the bricks are put into the tunnel Drying in a tunnel-type drying tunnel for 24 hours, wherein the inlet temperature of the tunnel-type drying tunnel is controlled at 60°C and the outl...

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Abstract

The invention provides a bauxite composite refractory brick which comprises a main material and an additive, wherein the main material comprises the following raw materials by the mass percentage: 20%-35% of large bauxite clinker particles, 15%-30% of small bauxite clinker particles, 5%-15% of a combined clay fine powder, 15%-30% of a fine bauxite clinker powder, and 5%-20% of an andalusite micro-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 application of the bauxite composite refractory brick. The bauxite composite refractory brick is reasonable in composition collocation, good in thermal shock property, relatively good in thermal stability and relatively high in 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 bauxite 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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IPC IPC(8): C04B35/66C04B35/622
CPCC04B35/101C04B35/622C04B2235/3427C04B2235/349C04B2235/96C04B2235/9607
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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