Low-creep fire brick, and preparation method and application thereof

A refractory brick and low-creep technology, applied in the field of refractory materials, can solve the problems of anode carbon block production impact, low load softening point, poor thermal shock stability, etc., achieve reasonable composition, improve service life, 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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  • 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 fire brick, and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a low-creep 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 bone The material and the fine material include the following raw materials in mass percentage: 30% of large coke gemstone particles, 27% of small sillimanite particles, 15% of bonded clay fine powder and 28% of bauxite clinker fine powder.

[0027] Wherein, the particle size of the large burnt gemstone particles is 1 mm to 3 mm, the particle size of the small sillimanite particles is less than 1 mm, the particle size of the bonded clay fine powder is less than 0.074 mm, and the bauxite clinker fine powder is The particle size is less than 0.043 mm. The chemical composition of each raw material is shown in Table 1.

[0028] Table 1, the main chemical composition of each raw material

[0029] raw material

al 2 o 3

Fe 2 o 3

K ...

Embodiment 2

[0036] This embodiment provides a low-creep 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: 31% of large coke gemstone particles, 29% of sillimanite small particles, 18% of bonded clay fine powder and 22% of bauxite clinker fine powder %.

[0037] The preparation method of the low-creep 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 adobe, and then the adobe is put into a tunnel type Drying in a drying tunnel for 24 hours, wherein the inlet temperature of the tunnel-type drying tunnel is controlled at 60°C and the outlet temperature is 130°C; the dried bricks are loaded into a gas-fired tunnel ki...

Embodiment 3

[0040] This embodiment provides a low-creep refractory brick, the specific raw material composition is roughly the same as that of Embodiment 1, the difference is that in this embodiment, the mass of the pulp water is the total mass of the aggregate and the fine material 5.5%, the aggregate and the fine material include the following raw materials in mass percentages: 31% of large sillimanite particles, 29% of sillimanite small particles, 20% of bonded clay fine powder and 20% of bauxite clinker fine powder %.

[0041]The preparation method of the low-creep 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 adobe, and then the adobe is put into a tunnel type Drying in a drying tunnel for 24 hours, wherein the inlet temperature of the tunnel-type drying tunnel is controlled to be 60°C and the outlet temperature is 130°C; then the dried bricks are calcined at a temperature of...

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Abstract

The invention provides a low-creep fire brick. The low-creep fire brick is prepared from a main material and an additive, wherein the main material is prepared from the following raw materials in percentage by mass: 20 to 40 percent of large flint clay particles, 20 to 30 percent of small sillimanite particles, 15 to 40 percent of binding clay fine powder and 5 to 15 percent of bauxite clinker micro powder; the mass of the additive is 4.5 to 5.5 percent of that of the main material. The invention also provides a preparation method and application of the low-creep fire brick. The low-creep fire brick provided by the invention is reasonable in component matching and has good thermal-shock property, better thermal stability and higher refractoriness under load, so that the service life of a carbon roasting furnace with a flue wall built by using the low-creep fire brick is increased.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185F27D1/06
CPCC04B35/66C04B35/185C04B2235/3217C04B2235/3463C04B2235/349C04B2235/96C04B2235/9607F27D1/06
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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