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Low-creep andalusite composite refractory brick and preparation method and application thereof

A technology of andalusite and refractory bricks, which is applied in the field of low-creep andalusite composite refractory bricks and its preparation, can solve the problems of anode carbon block production impact, low load softening point, poor thermal shock stability, etc., and achieve reasonable composition matching , Improve service life, 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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  • Low-creep andalusite composite refractory brick and preparation method and application thereof

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Embodiment 1

[0027] This embodiment provides a low-creep andalusite 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 aggregate and the fine material include raw materials in the following mass percentages: bauxite clinker large particles 10%, mullite large particles 21%, andalusite small particles 14%, mullite small particles 14%, Andalusite fine powder 26%, kaolin fine powder 8%, mullite fine powder 5%, silica fine powder 2%.

[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 andalusite particles is less than 1 mm, the particle size of the andalusite fine powder is less than 0.074 mm, the particle size of the kaolin fine powder is less th...

Embodiment 2

[0037]This embodiment provides a low-creep andalusite 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 aggregate and the fine 5% of the total mass of the material, the aggregate and the fine material include the following raw materials in mass percentages: bauxite clinker large particles 12%, mullite large particles 19%, andalusite small particles 15%, mullite 14% small granules of stone, 25% fine powder of andalusite, 5% fine powder of kaolin, 7% fine powder of mullite, 3% fine powder of silicon.

[0038] The preparation method of the low-creep andalusite 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 adobe, and then the adobe is placed in Dry in a tunnel-type drying hole for 36 hours, wherein the inlet tempe...

Embodiment 3

[0041] This embodiment provides a low-creep andalusite 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 aggregate and the fine 5.5% of the total mass of the material, the aggregate and the fine material include the following raw materials in mass percentages: bauxite clinker large particles 6%, mullite large particles 25%, andalusite small particles 14%, mollite 15% small granules of stone, 20% fine powder of andalusite, 8% fine powder of kaolin, 8% fine powder of mullite, 4% fine powder of silicon.

[0042] The preparation method of the low-creep andalusite 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 adobe, and then the adobe is placed in Dry in a tunnel-type drying hole for 25 hours, wherein the inlet tem...

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Abstract

The invention provides a low-creep andalusite composite refractory brick, which comprises main materials and additives. The main materials include, by weight, 6-12% of large particles of bauxite clinker, 14-27% of large particles of mullite, 14-27% of small particles of andalusite, 14-30% of small particles of mullite, 15-27% of fine powder of andalusite, 5-14% of kaolin micro-powder, 5-10% of mullite micro-powder and 2-5% of silica micro-powder. The mass of the additives is 4.5-5.5% of mass of the main materials. The invention also provides a preparation method and application of the above low-creep andalusite composite refractory brick. The low-creep andalusite composite refractory brick has reasonable combination of ingredients and has good thermal shock property, good thermostability and high refractoriness under load. Therefore, service life of a carbon baking furnace having flue walls lined with the low-creep andalusite composite refractory brick is prolonged.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a low-creep andalusite 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 r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185
CPCC04B35/66C04B35/185C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/349
Inventor 贺延奎王法河
Owner 济源市金峰耐火材料有限公司
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