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High-aluminum pull brick for carbon anode roasting furnace flame paths and preparation method thereof

A carbon anode and furnace fire channel technology is applied in the field of high-alumina drawn bricks for carbon anode roasting furnace fire channels and their preparation, and can solve the problem of high creep rate, low high-temperature flexural strength and low softening point under load of high-alumina drawn bricks. and other problems, to achieve the effect of high high temperature flexural strength, low creep rate and high softening point under load

Active Publication Date: 2015-01-14
河南鑫诚耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the prior art, to provide a high-alumina brick for a carbon anode roasting furnace and a preparation method thereof, so as to solve the problem of high creep rate and load softening point of the high-alumina brick in the prior art. Disadvantages such as low and high temperature flexural strength and large deformation of external dimensions

Method used

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  • High-aluminum pull brick for carbon anode roasting furnace flame paths and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. After crushing calcined mullite and calcined high-alumina bauxite, sieve them into a particle size of 1-3mm; after crushing andalusite, sieve them into a particle size of 0-1mm;

[0026] 2. Select alumina powder with a mass percentage of 10%, Guangxi clay powder with a mass percentage of 10% and andalusite fine powder with a mass percentage of 16% to mix, and grind into a co-milled powder with a fineness of ≤0.088mm;

[0027] 3. Combine the co-milled powder with calcined mullite with a mass percentage of 12% and a particle size of 1-3mm, calcined high-alumina bauxite with a mass percentage of 23% and a particle size of 1-3mm, a mass percentage of 29%, and a particle size of 0-1mm andalusite particles are mixed to make a mixture;

[0028] 4. Add pulp waste liquid in a ratio of 100:1 to the mass ratio of the mixture, and knead for 10 minutes to make a kneading mud;

[0029] 5. Use a 315T pneumatic press to press the mixed mud into a density > 2.75g / cm 3 adobe;

[00...

Embodiment 2

[0033] 1. After crushing calcined mullite and calcined high-alumina bauxite, sieve them into a particle size of 1-3mm; after crushing andalusite, sieve them into a particle size of 0-1mm;

[0034] 2. Select alumina powder with a mass percentage of 16%, Guangxi clay powder with a mass percentage of 12% and andalusite fine powder with a mass percentage of 21% to mix, and grind into a co-milled powder with a fineness of ≤0.088mm;

[0035] 3. Combine the co-milled powder with calcined mullite with a mass percentage of 8% and a particle size of 1-3mm, calcined high-alumina bauxite with a mass percentage of 17% and a particle size of 1-3mm, a mass percentage of 26%, and a particle size of 0-1mm andalusite particles are mixed to make a mixture;

[0036] 4. Add pulp waste liquid according to the mass ratio of 100:2 to the mixture, and mix for 15 minutes to make mixed mud;

[0037] 5. Use a 315T pneumatic press to press the mixed mud into a density > 2.75g / cm 3 adobe;

[0038] 6. Th...

Embodiment 3

[0040] 1. After crushing calcined mullite and calcined high-alumina bauxite, sieve them into a particle size of 1-3mm; after crushing andalusite, sieve them into a particle size of 0-1mm;

[0041] 2. Select alumina powder with a mass percentage of 14%, Guangxi clay powder with a mass percentage of 12% and andalusite fine powder with a mass percentage of 21%, and grind them into a co-milled powder with a fineness of ≤0.088mm;

[0042] 3. Combine the co-milled powder with calcined mullite with a mass percentage of 11% and a particle size of 1-3mm, calcined high-alumina bauxite with a mass percentage of 17% and a particle size of 1-3mm, a mass percentage of 25%, and a particle size of 0-1mm andalusite particles are mixed to make a mixture;

[0043] 4. Add pulp waste liquid according to the mass ratio of 100:1.5 to the mixture, and knead for 12 minutes to make a kneading mud;

[0044] 5. Use a 315T pneumatic press to press the mixed mud into a density > 2.75g / cm 3 adobe;

[004...

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Abstract

The invention discloses a high-aluminum pull brick for carbon anode roasting furnace flame paths and a preparation method thereof. The high-aluminum pull brick for carbon anode roasting furnace flame paths is prepared by mixing, calcining and pressing calcined mullite, calcined high-aluminum bauxite, andalusite granules, alumina powder, Gangxi clay powder and andalusite fine powder. The preparation method comprises the following steps: 1. crushing and screening the calcined mullite and calcined high-aluminum bauxite; 2. selecting 10-16 wt% of alumina powder, 10-12 wt% of Gangxi clay powder and 15-21 wt% of andalusite fine powder, mixing and grinding; 3. mixing the co-ground powder with 8-12 wt% of calcined mullite, 17-23 wt% of calcined high-aluminum bauxite and 25-29 wt% of andalusite granules; 4. adding pulp waste, and compounding; 5. pressing to be green bricks; and 6. drying and calcining to obtain the finished product. The high-aluminum pull brick for carbon anode roasting furnace flame paths has the advantages of low creep rate, high refractoriness under load, favorable high-temperature folding strength and small physical dimension deformation, and can prolong the service life of the carbon anode roasting furnace and lower the maintenance cost.

Description

technical field [0001] The invention relates to the technical field of carbon anode roasting furnaces, in particular to a high-alumina drawn brick for a carbon anode roasting furnace fire path and a preparation method thereof. Background technique [0002] The flue is the most important part of the anode roaster. The firebricks used in the flue wall of the carbon anode roaster have many varieties, complex shapes and high technical requirements. The high-alumina drawn brick for the flue path of the carbon anode roaster is a kind of refractory brick for the flue wall of the carbon anode roaster. The two ends of the high-alumina bricks are built on the flue wall, and the middle is suspended, and the interior of the flue wall is a w-shaped masonry structure. Therefore, the high-alumina bricks are required to minimize the smoke while ensuring the overall strength of the flue. Loss along the bearing resistance and local resistance, and effectively reduce the temperature differenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 彭亚琴孙小军
Owner 河南鑫诚耐火材料股份有限公司
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