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A vacuum heat-insulating refractory product and its preparation method

A technology of refractory materials and vacuum insulation, applied in the field of refractory materials, can solve the problems of high cost, unusable, unfavorable large-scale commercial production, etc., and achieve the effects of low cost, reduced sintering shrinkage, and significant energy saving effect.

Active Publication Date: 2020-06-26
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is only limited to medium and low temperature fields, and cannot be used under high temperature conditions
And because airgel is used as the filling material, the cost is high, which is not conducive to large-scale commercial production

Method used

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  • A vacuum heat-insulating refractory product and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A vacuum heat insulation refractory product, including a core material and a film wrapped around the core material, the core material is a mixture of 80% fumed silica powder and 20% aluminum silicate fibers evenly dispersed; the outer height of the core material The barrier film is a titanium oxide ceramic film;

[0028] The preparation process is:

[0029] Preparation of core material: Weigh fumed silica powder and aluminum silicate fiber with a diameter of 0.5mm and a length of 1-2mm, and the weight ratio is 4:1. The powder is staggered and interspersed with a certain integrity, and then pressed and formed into a core material;

[0030] Preparation of titanium oxide ceramic film: use casting machine to prepare titanium oxide ceramic film, first mix 90g of titanium oxide base material, 85g of polyvinyl alcohol aqueous solution with a concentration of 6%, and 7g of glycerin to prepare titanium oxide slurry. The prepared titanium oxide slurry is cast from the upper hop...

Embodiment 2

[0034] A vacuum heat-insulating refractory product, including a core material and a film wrapped around the core material. The core material is a mixture of 70% alumina powder and 30% zirconia crystal fibers evenly dispersed; The film is a heat-resistant alloy composite film;

[0035] The preparation process is:

[0036] Preparation of core material: Weigh alumina powder and zirconia crystalline fiber with a fiber diameter of 0.7mm and a length of 1-3mm, and the weight ratio is 7:3. The powder is staggered and interspersed with a certain integrity, and then pressed and formed into a core material;

[0037] Preparation of heat-resistant alloy composite film: first, mix 100g of heat-resistant alloy 1Cr18Ni9Ti powder, 85g of polyvinyl alcohol aqueous solution with a concentration of 7%, and 7g of glycerin to make a slurry, and then flow the prepared slurry from the upper hopper Extended to the stainless steel base belt, the green body is formed by the relative movement of the b...

Embodiment 3

[0041] A vacuum heat insulation refractory product, including a core material and a film wrapped around the core material, the core material is a mixture of 75% microporous titanium oxide powder and 25% alumina crystalline fiber evenly dispersed; The film is a high barrier silica glass film.

[0042] The preparation process is:

[0043]Preparation of core material: Weigh microporous titanium oxide powder and alumina fiber with a fiber diameter of 1-2mm and a length of 2-3mm, the weight ratio of which is 3:1, put the two into a mixer and mix them thoroughly to make the fiber Interlaced with the powder, with a certain integrity, and then pressed and formed into a core material;

[0044] Preparation of silica glass film: use a casting machine to prepare silica glass film. First, mix 95g of silica glass base material, 83g of 7% polyvinyl alcohol aqueous solution, and 6g of glycerin to make silica glass slurry Material, the prepared silica glass slurry is cast from the upper hopp...

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Abstract

The invention discloses a vacuum insulating refractory product and a preparation method thereof. The vacuum insulating refractory product is composed of a core material and a high-resistance film wrapped on the exterior of the core material, wherein the core material is formed by uniformly dispersing and then pressing 95-70wt% of low heat-conducting micro-pore powder and 5-30wt% of dispersed fire-resistant staples; a high-temperature resisting airtight film which is prepared from an inorganic material used as a main component in the manner of tape casting is served as the high-resistance film; the vacuum insulating refractory product is prepared after the pressed and molded core material is wrapped with the high-resistance film and then the vacuum hot-pressing packaging is performed; the product can be used under a temperature condition at 500-1200 DEG C, can maintain a vacuum structure and has ultralow thermal conductivity and high performance cost ratio; and the vacuum insulating refractory product is suitable for large-scale production, is convenient in mounting and use, can be matched with lightweight and heavy refractory materials and has an obvious energy-saving effect in effectively insulating the liner compound of a high-temperature industrial furnace.

Description

technical field [0001] The invention relates to a vacuum heat-insulating refractory product and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] At present, my country's energy supply situation is not optimistic. Industrial energy consumption accounts for 73% of the whole society's energy consumption. In 2010, the proportion of energy consumption in high-energy-consuming industries reached 81.2%, accounting for the vast majority of industrial energy consumption. According to the country's basic national policy of saving energy and protecting the environment, how to reduce the loss of energy and resources in high-temperature industries and protect the environment is imperative. The heat loss on the outer surface of a large number of high-temperature industrial kilns is still obvious, and research and development of high-efficiency, energy-saving and heat-insulating materials is imminent. [0003] Existing v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/78C04B35/66C04B35/14C04B35/46C04B35/622C04B35/106C03B19/00B22F7/04F27D1/16
CPCB22F7/04B22F2007/047C03B19/00C04B35/106C04B35/14C04B35/46C04B35/622C04B35/66C04B2235/5224C04B2235/5232C04B2235/5236F27D1/16
Inventor 马成良吕桂英靳亲国王世界王斌
Owner ZHENGZHOU UNIV
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