Aluminum-silicon light heat insulation brick and preparation method thereof

An insulating brick and light-weight technology, which is used in ceramic products, other household appliances, applications, etc., can solve the problems of general thermal insulation performance of lightweight insulating bricks, large thermal conductivity influence, stress concentration, etc., and achieve thermal shock. The effect of good stability, pollution-free process and low production cost

Active Publication Date: 2011-08-31
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of raw materials for this product is relatively high. Due to the addition of poly light balls, the internal pores of the brick body mainly exist in the form of large pores, and the strength of the material is closely related to the size of the pores. Large pores will inevitably cause stress concentration, resulting in lower strength; In addition, the pore size has a great influence on the th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An aluminum-silicon lightweight heat-insulating brick and a preparation method thereof. First, 40-45wt% of lightweight bauxite aggregate, 35-40wt% of high-alumina bauxite clinker, 5-8wt% of calcium aluminate cement, 8-10wt% of distiller's grains and 2-3wt% of silica powder Mix evenly, then add 0.05-0.08wt% sodium tripolyphosphate and 15-20wt% water, knead and cast; then maintain at room temperature for 24-36h, and dry at 100-120°C after demoulding 20~36h; finally keep warm at 1400~1450℃ for 3~5h.

[0022] In the present embodiment, the preparation method of lightweight bauxite aggregate is: first with 85-90wt% raw bauxite tailings fine powder and 10-15wt% Al(OH) 3 Fine powder is the main raw material, plus 1-2wt% ordinary paper fiber, granulated, dried at room temperature for 20-30 hours, then dried at 100-120°C for 20-30 hours, and then kept at 1350-1400°C 3 to 5 hours, natural cooling to prepare lightweight bauxite aggregate.

[0023] The aluminum-silicon lightweig...

Embodiment 2

[0025] An aluminum-silicon lightweight heat-insulating brick and a preparation method thereof. First, 45-50wt% of lightweight bauxite aggregate, 25-35wt% of high-alumina bauxite clinker, 6-10wt% of calcium aluminate cement, 10-13wt% of starch, 3-4wt% of silica powder Mix evenly, then add 0.08-0.10wt% sodium hexametaphosphate and 18-22wt% water, knead, cast and mold; then maintain at room temperature for 28-36h, and dry at 100-120°C after demoulding 20-36 hours; finally keep warm at 1450-1500°C for 3-5 hours.

[0026] In this embodiment, the preparation method of lightweight bauxite aggregate is: first with 88-93wt% raw bauxite tailings fine powder and 7-12wt% Al(OH) 3 Fine powder is the main raw material, plus 2-3wt% ordinary paper fiber, granulated, dried at room temperature for 20-30 hours, then dried at 100-120°C for 20-30 hours, and then kept at 1400-1450°C 3 to 5 hours, natural cooling to prepare lightweight bauxite aggregate.

[0027] The aluminum-silicon lightweight ...

Embodiment 3

[0029] An aluminum-silicon lightweight heat-insulating brick and a preparation method thereof. First, 50-55wt% of lightweight bauxite aggregate, 25-30wt% of high-alumina bauxite clinker, 7-12wt% of calcium aluminate cement, 8-10wt% of dextrin, 4-5wt% of silicon Mix the fine powder evenly, add 0.10-0.13wt% polycarboxylate superplasticizer and 20-23wt% water, knead, and cast; Dry at ℃ for 20-36 hours; finally keep at 1500-1550℃ for 3-5 hours.

[0030] In the present embodiment, the preparation method of lightweight bauxite aggregate is: first with 90-95wt% raw bauxite tailings fine powder and 5-10wt% Al(OH) 3 Fine powder is the main raw material, plus 1-2wt% ordinary paper fiber, granulated, dried at room temperature for 20-30 hours, then dried at 100-120°C for 20-30 hours, and then kept at 1350-1400°C 3 to 5 hours, natural cooling to prepare lightweight bauxite aggregate.

[0031] The aluminum-silicon lightweight brick prepared in this embodiment has a low bulk density (less...

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Abstract

The invention relates to an aluminum-silicon light heat insulation brick and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing 40-55 percent by weight of light alumina aggregate, 25-40 percent by weight of bauxite chamotte, 5-12 percent by weight of calcium aluminate cement, 8-13 percent by weight of organic polymer, 2-5 percent by weight of silicon powder, 0.05-0.15 percent by weight of water reducing agent and 15-25 percent by weight of water, calendering and molding by casting; curing under the condition of room temperature for 24-48 hours, demolding and drying at the temperature of 100-120 DEG C for 20-36 hours; and preserving heat at the temperature of 1,400-1,550 DEG C for 3-5 hours to obtain the aluminum-silicon light heat insulation brick. The preparation method has the advantages of wide raw materials, simple process and low production cost; the prepared aluminum-silicon light heat insulation brick has the advantages of high compressive strength, low volume density, low heat conductivity, high using temperature, low re-burning linear change rate, high thermal shock stability and the like; the product is applied to various industrial furnace heat insulation layers, has a wide application range and remarkably-reduced energy consumption and temperature outside a furnace, and can be safely and effectively produced.

Description

technical field [0001] The invention belongs to the technical field of lightweight heat-insulating bricks, and in particular relates to an aluminum-silicon light-weight heat-insulating brick and a preparation method thereof. Background technique [0002] Energy shortage is already a severe situation faced by the whole world. Low-carbon environmental protection and energy conservation are one of the important measures for my country to maintain stable economic development. Various industrial kilns and other thermal equipment are important facilities in industrial production and are also large energy consumers. Therefore, heat insulation for kilns and thermal equipment is an important way for their long-term safe use, energy saving and consumption reduction. This is a topic of great significance in order to effectively reduce the surface temperature of the furnace shell, ensure the safe operation of the equipment, and effectively reduce energy consumption. [0003] At presen...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/66C04B35/622
Inventor 顾华志方义能黄奥张美杰董西岳
Owner WUHAN UNIV OF SCI & TECH
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