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Mullite-anorthite-corundum multiphase microporous thermal insulation material and preparation method thereof

An insulating material and anorthite technology are applied in the field of mullite-anorthite-corundum composite microporous heat insulating material and its preparation, which can solve the problem of uneven pore size of materials, pollution in the production process, and increase production. Cost and other issues, to avoid secondary processing, fast drying time, and environmental protection in the production process

Inactive Publication Date: 2018-05-01
ZIBO CITY LUZHONG REFRACTORIES CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of adding burnout is to add an appropriate amount of organic matter to the raw materials, such as polylight balls, sawdust, starch, etc.; the foaming method is to add rosin and hydrogen peroxide to foam. These two methods have pollution in the production process or high production costs. , the obtained material has problems such as uneven pore size
[0004] At present, some new processes have appeared in the preparation method of anorthite lightweight heat insulation materials, such as the invention patent "anorthite light heat insulation refractory material and its preparation method" (CN 102491766 A) and the invention patent "calcium feldspar Stone lightweight refractory bricks and their preparation methods" (CN 102942376 A) are prepared by pouring molding, water is used as a pore-forming agent, and no burnt matter and foaming agent are added, but the process is still complicated and the drying time is long. Cutting is required after calcination, which increases the production cost. The anorthite light-weight refractory and heat-insulating material prepared is mainly composed of anorthite single-phase, and the service temperature is relatively low

Method used

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  • Mullite-anorthite-corundum multiphase microporous thermal insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the mass percentage, mix 40% of the natural raw materials of aluminum and silicon, 20% of the raw materials of alumina, 10% of the expansion agent, 20% of the raw materials of calcium carbonate, and 10% of the inorganic pore forming agent, and then add the above raw materials The weight percent and 6% of the binder are mixed to obtain the mixed mud; the green body is obtained by machine pressing under a pressure of 10MPa, and the green body is dried and put into a high-temperature kiln for 6 hours at 1450°C. After calcining and cooling with the furnace, a mullite-anorthite-corundum composite microporous thermal insulation material is obtained.

[0028] The 40% aluminosilicate natural raw material is composed of 12% kaolinite and 28% bauxite raw ore;

[0029] The 20% alumina material is composed of 5% α-alumina and 15% aluminum hydroxide;

[0030] The 10% expansion agent is composed of 6% kyanite and 4% andalusite;

[0031] The calcium carbonate raw materi...

Embodiment 2

[0037] According to mass percentage, mix 53% of aluminum-silicon natural raw materials, 15% of alumina raw materials, 15% of expansion agent, 10% of calcium carbonate raw materials, and 7% of inorganic pore-forming agents, and then add the above raw materials The weight percentage and 4% of the binder are mixed to obtain the mixed mud; the green body is formed by machine pressing under the condition of 15MPa, and the green body is dried and put into a high-temperature kiln for calcination under the condition of 1410°C for 4 hours. , with furnace cooling, a mullite-anorthite-corundum composite microporous thermal insulation material is obtained.

[0038] The 53% aluminosilicate natural raw material is composed of 23% burnt gems and 30% coal gangue;

[0039] The 15% alumina raw material is composed of 10% aluminum hydroxide and 5% industrial alumina;

[0040] The 15% expansion agent is composed of 8% kyanite, 4% silica and 3% sillimanite;

[0041] The 10% calcium carbonate raw...

Embodiment 3

[0047] According to the mass percentage, mix 70% of the natural aluminum and silicon raw materials, 1% of the alumina raw materials, 16% of the expansion agent, 6% of the calcium carbonate raw materials, and 7% of the inorganic pore-forming agent, and then add the above raw materials The weight percentage and 4% of the binder are mixed to obtain the mixed mud; the green body is machine-pressed under the condition of 13MPa, and the green body is dried and put into a high-temperature kiln for calcination at 1460°C for 5 hours. , with furnace cooling, a mullite-anorthite-corundum composite microporous thermal insulation material is obtained.

[0048] The 70% aluminosilicate natural raw material is composed of 30% bauxite raw ore and 40% coal gangue;

[0049] The alumina raw material is industrial alumina;

[0050] The 16% expansion agent is composed of 6% kyanite, 6% sillimanite and 4% andalusite;

[0051] The calcium carbonate raw material is limestone;

[0052] The inorganic...

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Abstract

The invention relates to a mullite-anorthite-corundum multiphase microporous thermal insulation material and a preparation method thereof, and belongs to the technical field of inorganic thermal insulation materials. The mullite-anorthite-corundum multiphase microporous thermal insulation material is prepared from the following raw materials in percentages by weight: 40-70% of aluminum siliceous natural raw material, 1-20% of aluminum oxide raw material, 10-25% of expansion agent, 5-20% calcium carbonate raw material, and 5-10% inorganic pore-increasing agent. The mullite-anorthite-corundum multiphase microporous thermal insulation material has a wide source of raw materials, is low in cost, has a high use temperature, and has a good thermal insulation effect. The invention also provides asimple, easy, energy-saving and environment-friendly preparation method.

Description

technical field [0001] The invention relates to a mullite-anorthite-corundum composite microporous thermal insulation material and a preparation method thereof, belonging to the technical field of inorganic thermal insulation materials. Background technique [0002] In recent years, with the depletion of energy, energy conservation, environmental protection, and reduction of energy consumption have received great attention from social development. To further reduce emissions, high temperature insulation materials are widely used in high temperature industries. Most of the traditional heat insulation materials have a low temperature and can only be used in the heat insulation layer and insulation layer, which is difficult to meet the application requirements of high temperature industries. The most urgent task is to develop thermal insulation materials with high strength, low thermal conductivity and excellent high temperature performance. [0003] The production process of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B35/10C04B35/185C04B35/195C04B33/132C04B35/622
CPCC04B33/1324C04B33/1328C04B35/10C04B35/185C04B35/195C04B35/622C04B38/08C04B2235/3208C04B2235/3217C04B2235/3218C04B2235/3418C04B2235/3463C04B2235/349C04B2235/36C04B2235/77C04B2235/96C04B2235/9607C04B38/0054C04B38/0067Y02P40/60
Inventor 赵飞贾元平封吉圣朱波郭玉涛
Owner ZIBO CITY LUZHONG REFRACTORIES CO LTD
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