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High infrared reflectivity spinel lightweight refractory insulation material and preparation method thereof

A technology of infrared reflection, refractory heat preservation, applied in the field of spinel light refractory heat insulation materials, can solve the problems of weakening the heat insulation effect of materials, affecting heat insulation performance, low volume density, etc., to achieve low production cost and reduce high temperature Thermal conductivity, effect of reducing bulk density

Inactive Publication Date: 2017-03-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing preparation methods of spinel lightweight refractory and thermal insulation materials have many advantages, they cannot produce lower bulk density, which further affects the thermal insulation performance. The temperature increases rapidly, which weakens the thermal insulation effect of the material at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A spinel light-weight refractory and thermal insulation material with high infrared reflectivity and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0035] The first step is to mix 70~80wt% titanium dioxide, 10~20wt% magnesium hydroxide and 8~10wt% magnesium chloride hexahydrate evenly, press and form under the condition of 50~80MPa, and then in nitrogen atmosphere and 800~1000 Heat treatment at ℃ for 0.5-1 hour to obtain heat-treated material I; then crush, grind and sieve heat-treated material I to obtain material A with a particle size of 0.088-1mm and material B with a particle size of less than 0.088mm.

[0036] In the second step, 20~30wt% of anhydrous potassium carbonate, 60~70wt% of titanium dioxide and 8~10wt% of glucose powder were evenly mixed, pressed and formed under the condition of 50~80MPa, and then in an argon atmosphere and 1000~ Heat treatment at 1200°C for 1 to 2 hours to obtain heat-tre...

Embodiment 2

[0041] A spinel light-weight refractory and thermal insulation material with high infrared reflectivity and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0042] In the first step, 80~85wt% metatitanic acid, 10~15wt% magnesium carbonate and 5~8wt% industrial dextrin powder were mixed evenly, pressed and formed under the condition of 80~100MPa, and then in argon atmosphere and 500 Heat treatment at ~800°C for 1-2 hours to obtain heat-treated material I; then crush, grind and sieve heat-treated material I to obtain material A with a particle size of 0.088-1mm and material B with a particle size of less than 0.088mm.

[0043] In the second step, mix 30~40wt% potassium sulfate, 50~60wt% metatitanic acid and 8~10wt% glucose powder evenly, press and form under the condition of 80~100MPa, and then in nitrogen atmosphere and 800~1000℃ Heat treatment under conditions for 0.5-1 hour to obtain heat-treated material II, then...

Embodiment 3

[0048] A spinel light-weight refractory and thermal insulation material with high infrared reflectivity and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0049] The first step is to mix 80~85wt% metatitanic acid, 5~10wt% magnesium sulfate and 8~10wt% glucose powder evenly, press and form under the condition of 50~80MPa, and then in argon atmosphere and 500~800 Heat treatment at ℃ for 1-2 hours to obtain heat-treated material I; then crush heat-treated material I, grind and sieve to obtain material A with a particle size of 0.088-1mm and material B with a particle size of less than 0.088mm.

[0050] In the second step, 25~35wt% of potassium chloride, 60~70wt% of metatitanic acid and 5~8wt% of industrial dextrin powder are mixed uniformly, pressed and formed under the condition of 50~80MPa, and then heated in an argon atmosphere and Heat treatment at 800-1000°C for 1-2 hours to obtain heat-treated material II, the...

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Abstract

The invention relates to a high-infrared reflectivity spinel light fire-resistant thermal insulating material and a preparation method thereof. According to the scheme of the high-infrared reflectivity spinel light fire-resistant thermal insulating material and the preparation method thereof, titaniferous raw material, magniferous raw material and binding agents are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and A material with particle size ranging from 0.088-1 mm and B material with particle size smaller than 0.088 mm are obtained; potassic raw material, titaniferous raw material and the binding agent are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and c material with particle size smaller than 0.088 mm is obtained; then the A material, the B material, the C material and the potassic raw material are mixed uniformly, grinding is conducted after thermal treatment is conducted, and D material with particle size ranging from 0.088-1 mm and E material with particle size smaller than 0.088 mm are obtained; finally, the magnesium aluminate spinel particles, magnesium aluminate spinel fine powders, the A material, the D material, the E material, the magniferous raw material, the aluminiferous raw material and the potassic raw material are mixed, water is added, the stirring is conducted, drying is conducted on a green body formed by pressing, the green body is soaked with water after thermal treatment is conducted, and drying is conducted. The prepared product is low in volume density, high in compression strength and low in high-temperature heat conductivity coefficient.

Description

technical field [0001] The invention belongs to the technical field of spinel light-weight refractory and thermal insulation materials. In particular, it relates to a spinel light-weight refractory and heat-insulating material with high infrared reflectivity and a preparation method thereof. Background technique [0002] The development of high-temperature industry has put forward higher requirements for thermal insulation materials, such as high efficiency, energy saving, high strength, low conductivity, waterproof, etc. For this reason, people have been seeking and researching materials with low thermal conductivity, high infrared reflectivity and micropores. A new thermal insulation material for high temperature industry. [0003] Magnesium aluminum spinel is MgO-Al 2 o 3 The only stable intermediate compound in the binary system, it has the advantages of high melting point, high temperature strength, strong corrosion resistance, and small thermal expansion coefficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 王周福刘江波刘浩王玺堂马妍
Owner WUHAN UNIV OF SCI & TECH
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