Preparation method of microporous kyanite-based lightweight insulating refractory material

A technology of lightweight heat insulation and refractory materials, applied in the field of refractory materials and ceramics, can solve the problems of uneven distribution, large pore size, and high cost, and achieve the effects of low cost, small change rate of firing line, and easy control

Active Publication Date: 2014-07-30
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pores in the product are large in diameter, unevenly distributed, mostly connected pores, and contain a large number of fine cracks, which make their strength lower and the cost higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First get 60wt% kyanite fine powder (Al 2 o 3 The content is 30%, the particle size is 200 mesh), 20wt% bauxite fine powder and 20wt% high alumina cement are raw materials, and then take the sum of the above raw materials weight 0.5wt% sodium tripolyphosphate, 0.5wt% chlorinated Calcium, 5wt% sucrose and 1wt% sodium carboxymethyl cellulose, pre-mixed for 2 minutes; then add 50wt% water of the sum of the weight of the above raw materials, and mix into a uniform slurry; add the weight of the above raw materials to the slurry And 1wt% fatty alcohol ammonium sulfate and 1wt% sodium dodecylbenzene sulfonate are stirred to make a uniform foam slurry; the foam slurry is injected into the mold and allowed to solidify at room temperature for 24 hours Forming; after demolding the green body, dry it at 110°C for 12 hours; put the dried green body into a sintering furnace, raise the temperature to 1300°C at a rate of 3°C / min and hold it for 3 hours to obtain microporous kyanite B...

Embodiment 2

[0032] First get 70wt% kyanite fine powder (Al 2 o 3 The content is 40%, the particle size is 200 mesh), 10wt% industrial alumina and 20wt% calcium aluminate cement as raw materials, and then take the sum of the above raw materials weight 0.5wt% polycarboxylate superplasticizer, 0.2wt% Sodium polyacrylate, 5wt% polyacrylic acid amine and 20wt% polyvinyl alcohol, pre-mixed for 2 minutes, then added 80wt% water of the sum of the weight of the above raw materials, stirred for 2 minutes, and made a uniform slurry; added to the slurry The above-mentioned raw material weight sum 2.5wt% sodium dodecylbenzene sulfonate is made into a uniform foam slurry through stirring; the foam slurry is injected into the mold, and left to stand in room temperature for 24 hours to make it solidify and form; After demoulding, the body was dried at 110°C for 12 hours; the dried body was put into a sintering furnace and raised to 1350°C at a rate of 3°C / min and kept for 3 hours to obtain a microporous...

Embodiment 3

[0035] First get 70wt% kyanite fine powder (Al 2 o 3content of 45%, particle size of 200 mesh), 10wt% of industrial alumina and 20wt% of calcium aluminate cement as raw materials, and then take the sum of the weight of the above raw materials 1wt% of sodium carbonate and 10wt% of gum arabic, pre-mixed for 10 Minutes, add the water of the sum 60wt% of above-mentioned raw material weight again, mix 7 minutes, make homogeneous slurry; Dialkyl sodium sulfate and 1wt% fatty alcohol polyoxyethylene ether sodium sulfate are stirred to make a uniform foam slurry; the foam slurry is injected into the mold, and left to stand for 24 hours at room temperature to make it solidified; After demoulding, dry the body at 110°C for 12 hours; put the dried body into a sintering furnace, raise the temperature to 1430°C at a rate of 3°C / min and keep it warm for 3 hours to obtain a microporous kyanite-based lightweight Insulating refractory material.

[0036] The bulk density of the microporous k...

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Abstract

The invention relates to a preparation method of a microporous kyanite-based lightweight insulating refractory material. The preparation method is realized by comprising the following steps: (1) by taking kyanite, auxiliary materials and a cementing material as raw materials, adding a certain amount of dispersing agent, thickening time control agent and foam stabilizer, premixing, adding a certain amount of water, and mixing to prepare uniform slurry; (2) adding a certain amount of foaming agent in the slurry, mechanically agitating and foaming to prepare uniform foam slurry; (3) injecting the foam slurry into a mould, standing under a room-temperature environment so as to be cued and formed; (4) demoulding a green body, and then drying and sintering to obtain the microporous kyanite-based lightweight insulating refractory material. The prepared microporous kyanite-based lightweight insulating refractory material has the advantages of microfine air bore aperture (20-200mum), low volume density, high porosity, high strength, small sintering line change rate, low thermal conductivity, high usage temperature and the like. The raw materials are mainly kyanite, and other raw materials are common materials in refractory material industry, and are non-toxic and low-cost. The preparation method is simple and is easily controlled for the technology, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical fields of refractory materials and ceramics. Specifically, it relates to a preparation method of a microporous kyanite-based lightweight heat-insulating refractory material. Background technique [0002] The rapid development of the global economy is accompanied by increasing energy consumption. Rational use of energy to achieve sustainable development is the common mission of mankind today and is in line with my country's national conditions and national policies. The high-temperature industry is the main energy-consuming industry in industrial production. The energy consumption of various industrial kilns is huge, accounting for about 40-70% of the total energy consumption. The heat loss is generally large and the energy utilization rate is low. Therefore, vigorously develop high-efficiency thermal insulation Thermal technology is of great significance. In recent years, with the continuous advancement of techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/10
Inventor 郭会师叶方保李文凤李腾飞马四凯
Owner ZHENGZHOU UNIV
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