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Preparation method of vacuum-packaged/ microporous powder composite high-temperature thermal insulation material

A technology of vacuum packaging and heat insulation materials, applied in the field of refractory materials, can solve the problems of low average thermal efficiency of kilns, reduction of material heat insulation capacity, energy waste, etc., to achieve the goal of ensuring vacuum degree, improving heat insulation capacity, and low raw material cost Effect

Pending Publication Date: 2021-01-15
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial production, a large number of high-temperature kilns are used, but the problem of high-efficiency heat insulation of the kiln has not been effectively solved, resulting in a low average thermal efficiency of the kiln and serious energy waste during work
When the temperature rises, not only the microporous powder will volatilize some gas, but also the vacuum degree in the packaging material itself will change, which reduces the heat insulation ability of the material in a high temperature environment

Method used

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  • Preparation method of vacuum-packaged/ microporous powder composite high-temperature thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An embodiment of the preparation method of the vacuum packaging / microporous powder composite high-temperature heat-insulating material of the present invention, the preparation method of the high-temperature heat-insulation material described in this embodiment is:

[0033] (1) Weigh the raw materials according to the formula, all by mass percentage, the raw materials and their proportioning ratio are: SiO 2 -Al 2 o 3 Micronized powder is 90%, ZrO 2 Fiber is 5%, TiO 2 Micronized powder is 5%. Put the raw materials in a high-speed mixer, the stirring speed is 2000r / min, the stirring time is 5min, and mix well. Put the mixed raw materials into the mold, press and form under the pressure of 0.2MPa, and the thickness of the prepared microporous powder composite slab is 15mm;

[0034] (2) Put two SiO sheets of the same size and shape 2 The ceramic film is aligned, and the three sides are hot-pressed and sealed into a bag shape. After cooling, the microporous powder com...

Embodiment 2

[0039] An embodiment of the preparation method of the vacuum packaging / microporous powder composite high-temperature heat-insulating material of the present invention, the preparation method of the high-temperature heat-insulation material described in this embodiment is:

[0040](1) Weigh the raw materials according to the formula, all by mass percentage, the raw materials and their proportioning ratio are: SiO 2 -Al 2 o 3 Micronized powder is 85%, ZrO 2 Fiber is 6%, TiO 2 Micronized powder is 9%. Put the raw materials in a high-speed mixer, the stirring speed is 2000r / min, the stirring time is 5min, and mix well. Put the mixed raw materials into the mould, press and form under the pressure of 0.4MPa, and the thickness of the prepared microporous powder composite slab is 20mm;

[0041] (2) Put two SiO sheets of the same size and shape 2 The ceramic film is aligned, and the three sides are hot-pressed and sealed into a bag shape. After cooling, the microporous powder com...

Embodiment 3

[0046] An embodiment of the preparation method of the vacuum packaging / microporous powder composite high-temperature heat-insulating material of the present invention, the preparation method of the high-temperature heat-insulation material described in this embodiment is:

[0047] (1) Weigh the raw materials according to the formula, all by mass percentage, the raw materials and their proportioning ratio are: SiO 2 -Al 2 o 3 Micronized powder is 80%, ZrO 2 Fiber is 8%, TiO 2 Micronized powder is 12%. Put the raw materials in a high-speed mixer, the stirring speed is 2000r / min, the stirring time is 5min, and mix well. Put the mixed raw materials into the mold, press and form under the pressure of 1.2MPa, and the thickness of the prepared microporous powder composite slab is 25mm;

[0048] (2) Put two SiO sheets of the same size and shape 2 The ceramic film is aligned, and the three sides are hot-pressed and sealed into a bag shape. After cooling, the microporous powder co...

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Abstract

The invention discloses a preparation method of a vacuum-packaged / microporous powder composite high-temperature thermal insulation material. The preparation method comprises the following steps: adding 5-10% of ZrO2 fibers and 0-20% of a TiO2 opacifier into 75-95% of SiO2-Al2O3 composite microporous powder, uniformly mixing the components, pressing the mixture to obtain a microporous powder composite plate blank, hot-pressing the sides by using SiO2 ceramic membranes as a packaging material, and packaging the composite plate blank into the packaging material to complete first-time vacuum-pumping pre-packaging; and heating to 600 DEG C in a vacuum hot-pressing furnace, carrying out second-time vacuumizing, heating to 1200 DEG C, and hot-pressing the last side to finish vacuum packaging, thereby obtaining the vacuum-packaged / microporous powder composite high-temperature heat-insulating material. Vacuum pumping is carried out twice on the product at 600 DEG C, so that the high vacuum degree in the packaging material in a high-temperature working environment can be maintained; and meanwhile, Al2O3 and TiO2 micro-powder is added into the SiO2 micro-powder, so that the thermal stabilityof the microporous powder is improved, and the thermal insulation property at high temperature is ensured. The product is applied to a thermal insulation layer of a high-temperature kiln, can effectively reduce heat loss during working of the kiln and improve the energy utilization rate, and is a new generation of high-performance high-temperature thermal insulation material.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a method for preparing a vacuum-encapsulated / microporous powder composite high-temperature heat-insulating material. Background technique [0002] my country is a big industrial country, and its dependence on energy is very serious. In industrial production, a large number of high-temperature kilns are used, but the problem of high-efficiency heat insulation of kilns has not been effectively solved, resulting in low average thermal efficiency of kilns and serious energy waste during operation. As a new type of high-efficiency heat insulation material, vacuum heat insulation material has the advantages of small volume density and good heat insulation performance. Using it as a material for the insulation layer of a high-temperature kiln can effectively reduce heat loss during kiln operation and achieve efficient use of energy. [0003] Vapor SiO 2 Powder is a commonly used m...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/14C04B35/64C04B38/00
CPCC04B35/14C04B35/64C04B38/00C04B2235/3217C04B2235/3418C04B2235/5236C04B2235/3232C04B2235/6581C04B2235/95C04B2235/77C04B2235/96C04B2235/9607
Inventor 马成良邢益强王世界李祥杜浩然靳亲国
Owner ZHENGZHOU UNIV
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