A kind of preparation method of microporous high temperature resistant lightweight refractory brick

A technology of high temperature resistant refractory bricks, which is applied in the field of preparation of microporous high temperature resistant lightweight refractory bricks, can solve the problems of corrosion resistance, high temperature resistance, low strength, etc. , the effect of low density

Active Publication Date: 2022-05-10
张家港市盛澳电炉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of microporous high temperature resistant lightweight refractory bricks to solve the problems of high temperature resistance, corrosion resistance, low strength and high cost raised in the background technology

Method used

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  • A kind of preparation method of microporous high temperature resistant lightweight refractory brick
  • A kind of preparation method of microporous high temperature resistant lightweight refractory brick

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] 1. Weigh 3.8kg of alumina powder, 570g of polycrystalline mullite fiber, 750g of silicon powder, 300g of carbonized rice husk, 60g of K12 powder, and 100g of agar powder, add them to a ball mill and mix them for 1 hour, mix well and take out for use;

[0026] 2. Weigh 1.2kg of 80°C water for use, weigh 1.0kg of silica aerosol, 130ml of sodium carboxymethyl cellulose solution, and 70ml of ammonium salt solution, mix them into 80°C water, and use a mixer at 100 rpm, Stir slowly for 5min to make a mixed solvent;

[0027] 3. Gradually add the uniformly mixed powder into the mixed solvent. During the powder addition process, keep the mixer stirring slowly (rotating speed 100 rpm). After the powder is completely added to the mixed solvent, increase the mixer speed (rotating speed 700 rpm). Stir at high speed for 15 minutes until the slurry foams sufficiently;

[0028] 4. Pour the foamed slurry into a mold with a size of 480*165*90mm, let it stand for 24 hours, cool the slurr...

Embodiment approach 2

[0032] 1. Weigh 4.32kg of alumina powder, 640g of polycrystalline mullite fiber, 840g of silicon powder, 380g of carbonized rice husk, 80g of K12 powder, and 110g of agar powder, add them into a ball mill and mix them for 2 hours, mix well and take out for use;

[0033] 2. Weigh 1.3kg of 80°C water for use, weigh 1.1kg of silica aerosol, 150ml of sodium carboxymethyl cellulose solution, and 80ml of ammonium salt solution, mix them into 80°C water, and use a mixer at a speed of 100 rpm. Stir slowly for 5min to make a mixed solvent;

[0034] 3. Gradually add the uniformly mixed powder into the mixed solvent. During the powder addition process, keep the mixer stirring slowly (rotating speed 200 rpm). After the powder is completely added to the mixed solvent, increase the mixer speed (rotating speed 900 rpm). Stir at high speed for 20 minutes until the slurry foams sufficiently;

[0035] 4. Pour the foamed slurry into a mold with a size of 960*125*80mm, and let it stand for 24 ho...

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Abstract

The invention discloses a preparation method of a microporous high temperature resistant lightweight refractory brick, and relates to the technical field of refractory bricks. The microporous high temperature resistant lightweight refractory brick is made of refractory grade alumina powder, polycrystalline mullite fiber and silicon powder It is ceramic aggregate, carbonized rice husk is used as pore-forming agent, water is used as solvent, silica airgel is used as binder, sodium carboxymethyl cellulose solution is used as foam stabilizer, and ammonium salt solution is used as dispersion agent. Agent, K12 powder is used as foaming agent, and agar powder is used as molding agent. The structure of this product is simple to manufacture, and the cost is low. The microporous lightweight brick produced has low density, low thermal conductivity, good heat insulation and energy saving effect, strong acid and alkali corrosion resistance, and long service life.

Description

technical field [0001] The invention relates to the technical field of refractory bricks, in particular to a preparation method of microporous high-temperature resistant lightweight refractory bricks. Background technique [0002] At present, refractory bricks and ceramic fiber materials are generally used as furnace linings in the fields of high-temperature industrial electric furnaces, high-temperature kilns, and laboratory electric furnaces at home and abroad. Existing refractory bricks that can be used in environments above 1600°C all have the disadvantages of high density (>2.0g / cm3), compact structure, large heat capacity, high heat storage, high thermal conductivity, and poor thermal insulation performance. Development requirements for energy saving and emission reduction. The ceramic fiber material has low density, excellent thermal conductivity and energy-saving effect, but the use temperature can reach more than 1600 ℃, and the ceramic fiber material has low st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/10C04B35/101C04B35/80
CPCC04B38/10C04B35/101C04B2235/3418C04B2235/422C04B2235/5232C04B2235/77C04B2235/96C04B2235/9607C04B35/803C04B38/0067
Inventor 黄礼平潘菲杨灿伟
Owner 张家港市盛澳电炉科技有限公司
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