Mullite fire resistant insulation products and preparation method thereof

A technology of refractory heat preservation and mullite, which is applied in the field of heat preservation materials, can solve the problems of large thermal conductivity, large proportion of heat preservation materials, and limited application fields, and achieve the effects of small volume density, low heat conductivity and high compressive strength

Inactive Publication Date: 2009-02-11
徐进清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional refractory insulation materials include soft refractory insulation materials and hard refractory insulation materials. These insulation materials have defects such

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Embodiment 1, mullite refractory thermal insulation product, by weight: 12 parts of mullite powder, 20 parts of industrial alumina, 10 parts of kyanite powder, 32 parts of white wool, 4 parts of polystyrene and sawdust, Take 80 parts of water, mix it in the mud for 3 times to achieve the purpose of uniform mixture, and then inject it into the mold for casting, and then naturally dry and shape, demould to obtain the semi-finished product. The semi-finished product is dried to a moisture content of less than 0.8% wt (weight percent), and then gradually heated to 1400°C for 4 hours in a sintering furnace; gradually cooled to room temperature to obtain ultra-lightweight, low thermal conductivity, high-heavy-burned mullite refractory insulation product.

[0014] Al in mullite powder 2 O 3 >55%wt, Fe 2 O 3 2 O 3 >99%wt, particle size≤180 mesh; Al in kyanite powder 2 O 3 >58%wt, Fe 2 O 3 2 O 3 >35%wt, Fe 2 O 3 <1.5%wt, particle size≤180 mesh; particle size of combu...

Example Embodiment

[0015] Example 2: In this example, 15 parts of mullite powder, 25 parts of industrial alumina, 15 parts of kyanite powder, 36 parts of white wool, 10 parts of sawdust, and 85 parts of water were mixed forcibly in a mud mixer for 3 parts. To achieve the purpose of uniformity of the mixture, it is then injected into the mold for casting, and the semi-finished product is obtained by demoulding after natural drying and shaping. The semi-finished product is dried to a moisture content of less than 0.8% wt, and then gradually heated to 1420°C for 3.5 hours in a sintering furnace; gradually cooled to room temperature to obtain an ultra-light, low thermal conductivity, high-heavy-burned mullite refractory thermal insulation product, other same Example 1.

Example Embodiment

[0016] Example 3: In this example, 16 parts of mullite powder, 30 parts of industrial alumina, 18 parts of kyanite powder, 40 parts of white wool, 12 parts of polystyrene, and 90 parts of water were mixed forcibly in a mud mixer. It is smelted 4 times to achieve the purpose of full and uniform mixture, and then it is poured into the mold for casting, and the semi-finished product is obtained by demoulding after natural drying and shaping. The semi-finished product is dried to a moisture content of less than 0.8% wt, and then gradually heated to 1450 ° C for 3 hours in a sintering furnace; gradually cooled to room temperature to obtain an ultra-light, low thermal conductivity, high-heavy-burned mullite refractory thermal insulation product, other same Example 1.

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Abstract

A mullite refractory thermal insulation product takes mullite powder, industrial alumina powder and kyanite powder as main materials and takes white wool soil and combustible substances as auxiliary materials, and the mullite refractory thermal insulation product is formed by adding water, mixing, shaping and sintering. The parts by weight of various raw materials are: 12 to 16 parts of mullite powder, 20 to 30 parts of industrial alumina powder, 10 to 18 parts of kyanite powder, 32 to 40 parts of white wool soil, 8 to 12 parts of combustible substances and 80 to 90 parts of water. Al2O3 in the mullite powder is more than 55 percent by weight, Fe2O3 is less than 1 percent by weight, the particle size is not more than 180 meshes; the Al2O3 in the industrial alumina powder is more than 99 percent by weight, the particle size is not more than 180 meshes; the Al2O3 in the kyanite powder is more than 58 percent by weight, the Fe2O3 is less than 1 percent by weight, the particle size is not more than 120 meshes; the Al2O3 in the white wool soil is more than 35 percent by weight, the Fe2O3 is less than 1.5 percent by weight, the particle size is not more than 180 meshes; the combustible substances are polystyrene and/or sawdust with the particle size of less than 1mm. The specific gravity of the product is 0.5 to 0.6g/cm<3>. The product has super-lightweight, low thermal conductivity, high re-burning and can be directly contacted with flame.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to an ultra-light, low thermal conductivity, high-weight burnt mullite refractory thermal insulation product and a preparation method thereof. Background technique [0002] Traditional refractory insulation materials include soft refractory insulation materials and hard refractory insulation materials. These insulation materials have defects such as large specific gravity and high thermal conductivity, and because of the use temperature problem, they cannot directly contact the flame, and their application fields are limited. Therefore, the development and utilization of environmentally friendly and energy-saving refractory insulation materials that are ultra-light, low thermal conductivity, high reburning, and can directly contact flames is an important development direction of refractory insulation materials. , Improving the economic benefits of enterprises ...

Claims

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Application Information

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IPC IPC(8): C04B35/101C04B35/622
Inventor 徐进清李建设申会超徐保进
Owner 徐进清
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