Microporous high-alumina bauxite clinker lightweight refractory brick and preparation method thereof

A high-alumina bauxite clinker and refractory brick technology, which is applied in the field of refractory materials, can solve the problems of increased thermal conductivity of refractory materials, increased heat energy loss, and aggravation, so as to achieve a firm skeleton structure, increase the critical particle size, and ensure consistent effect

Inactive Publication Date: 2018-04-24
HENAN HAINADE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The commonly used refractory castables are mainly Al 2 o 3 -SiO 2 However, when this type of refractory material is used in petrochemical and other industries, due to the influence of the reducing atmosphere environment, the damage of the refractory material will be aggravated, thereby reducing the service life of the material
In addition, due to the large size of pores in traditional refractory aggregates, the pore diameters are mostly

Method used

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  • Microporous high-alumina bauxite clinker lightweight refractory brick and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides a microporous high-alumina bauxite clinker lightweight refractory brick, including main ingredients and pulp water, wherein the main ingredients include the following materials in mass percentages: 30% of high-alumina bauxite clinker large particles, Calcium aluminate fine powder 25%, kaolin superfine powder 8%, Al 2 o 3 Micropowder 15%, silicon micropowder 8%, starch 12%, fine silica airgel 2%; the quality of the pulp water is 5.5% of the mass of the main material. The particle size of the large particles of high alumina bauxite clinker is 1 mm to 3 mm, the particle size of the calcium aluminate fine powder is less than 0.074 mm, the particle size of the combined clay fine powder is less than 0.074 mm, the Al 2 o 3 The particle size of the micropowder is less than 0.043 mm, and the particle size of the silicon micropowder is less than 0.043 mm. The chemical composition of each raw material is shown in Table 1.

[0030] Table 1, the main ch...

Embodiment 2

[0036] This embodiment provides a microporous high-alumina bauxite clinker lightweight refractory brick, including main ingredients and pulp water, wherein the main ingredients include the following materials in mass percentages: 30% of high-alumina bauxite clinker large particles, Calcium aluminate fine powder 20%, kaolin superfine powder 10%, Al 2 o 3 Micropowder 20%, silicon micropowder 7%, nano-carbon black 10%, fine silica airgel 3%; the quality of the pulp water is 5.5% of the mass of the main material.

[0037] The preparation method of the microporous high-alumina bauxite clinker lightweight refractory brick described in this embodiment is roughly the same as the preparation method in Example 1, except that:

[0038] The mixed and milled mud is pressed into adobe, then placed in a drying kiln, and dried at a temperature of 200°C for 48 hours; then the dried adobe is calcined at a temperature of 1100°C for 24 hours to produce The microporous high-alumina bauxite clink...

Embodiment 3

[0041] This example provides a light-weight refractory brick made of microporous high-alumina bauxite clinker. The specific raw material composition is roughly the same as that of Example 1, except that:

[0042] In this example, high alumina bauxite clinker large particles 18%, calcium aluminate fine powder 25%, kaolin superfine powder 12%, Al 2 o 3 Micro powder 25%, silicon micro powder 5%, petroleum coke 12%, fine silica airgel 3%.

[0043] The preparation method of the microporous high-alumina bauxite clinker lightweight refractory brick described in this example is the same as that in Example 1. After testing, the density of the microporous high-alumina bauxite clinker lightweight refractory bricks prepared in this example is 1.1 g / cm 3 .

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Abstract

The invention provides a microporous high-alumina bauxite clinker lightweight refractory brick, which includes main ingredients and additives. The main ingredients include the following materials in mass percentages: 15% to 30% of high-alumina bauxite clinker large particles, Calcium aluminate fine powder 18% ~ 25%, kaolin superfine powder 8% ~ 12%, Al2O3 micropowder 15% ~ 25%, silicon micropowder 5% ~ 8%, pore forming agent 8% ~ 12%, fine silicon dioxide 1% to 3% of airgel; the mass of the additive is 4.5% to 5.5% of the mass of the main material. The composition of the microporous high-alumina bauxite clinker lightweight refractory brick is reasonably matched, and uniformly distributed micron-sized pores are formed inside the material, so that the product has good thermal shock resistance, good thermal stability and high load softening temperature. The present invention also provides a method for preparing the above-mentioned microporous high-alumina bauxite clinker lightweight refractory brick. The method has simple steps and is easy for automatic production.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a microporous high-alumina bauxite clinker lightweight refractory brick and a preparation method thereof. Background technique [0002] Refractory materials are widely used in metallurgy, petrochemical, glass and other high-temperature industries due to their good corrosion resistance to high-temperature media and their thermal insulation properties. As my country's emphasis on energy saving and consumption reduction continues to increase, more research and development has been done on lightweight refractory materials with good thermal insulation effects. Unshaped refractory materials have received special attention due to their advantages of convenient construction, low production cost, and good overall structure of the lining, among which refractory castables are the most widely used. [0003] The commonly used refractory castables are mainly Al 2 o ...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B38/08C04B35/66
CPCC04B38/0645C04B35/66C04B38/068C04B38/085C04B2235/3217C04B2235/3418C04B2235/349C04B2235/77
Inventor 张微微计富宝吉飞虎
Owner HENAN HAINADE NEW MATERIAL CO LTD
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