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Andalusite brick for carbon anode roasting furnace and preparation method thereof

An andalusite brick and carbon anode technology, which is applied in the field of carbon roasting furnaces, can solve the problems of not meeting the requirements of energy saving, consumption reduction, high efficiency and environmental protection, inability to meet the requirements of carbon roasting furnaces, poor shape and dimensional accuracy, etc. Excellent seismic stability and strong creep resistance

Inactive Publication Date: 2018-01-05
河南鑫诚耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, the low-creep bricks on the Chinese market, whether clay low-creep bricks or high-alumina low-creep bricks, have disadvantages such as high temperature creep rate, low load softening point, and poor shape and dimension accuracy, which cannot meet the requirements of my country's carbon roasting. The requirements for the development of large-scale furnaces and high-capacity furnaces cannot meet the requirements of national policies for energy saving, consumption reduction, high efficiency and environmental protection.

Method used

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  • Andalusite brick for carbon anode roasting furnace and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Sieve the calcined mullite into a particle size of 1-3 mm, and sieve the andalusite into a particle size of 0-1 mm after crushing.

[0023] 2. According to the production demand, weigh 20% andalusite fine powder, 8% calcined alumina fine powder, 6% high alumina fine powder and 8% Guangxi clay according to the mass percentage, and mix the above four raw materials , Grind into a co-grinding powder with a fineness of ≤0.088mm.

[0024] 3. Mix the co-milled powder with calcined mullite with a mass percentage of 38% and a particle size of 1-3 mm, and andalusite particles with a mass percentage of 20% and a particle size of 0-1 mm to make a mixture.

[0025] 4. Add the binder aluminum dihydrogen phosphate at a ratio of 100:1 to the mass of the mixture, and mix for 10 minutes to make a mixed slurry.

[0026] 5. Use a 315t pneumatic press to press the mixed mud into a density > 2.75g / cm 3 of adobe.

[0027] 6. Put the adobe into a drier with an inlet of 80°C and an outlet...

Embodiment 2

[0029] 1. Sieve the calcined mullite into a particle size of 1-3 mm, and sieve the andalusite into a particle size of 0-1 mm after crushing.

[0030] 2. According to the production demand, weigh 18% andalusite fine powder, 10% calcined alumina fine powder, 5.5% high alumina fine powder and 9% Guangxi clay according to the mass percentage, and mix the above four raw materials , Grind into a co-grinding powder with a fineness of ≤0.088mm.

[0031] 3. Mix the co-milled powder with calcined mullite with a mass percentage of 35% and a particle size of 1-3 mm, and andalusite particles with a mass percentage of 22.5% and a particle size of 0-1 mm to make a mixture.

[0032] 4. Add the binder aluminum dihydrogen phosphate at a ratio of 100:2 to the mass of the mixture, and mix for 15 minutes to make a mixed slurry.

[0033] 5. Use a 315t pneumatic press to press the mixed mud into a density > 2.75g / cm 3 of adobe.

[0034] 6. Put the adobe into a drier with an inlet of 80°C and an o...

Embodiment 3

[0036] 1. Sieve the calcined mullite into a particle size of 1-3 mm, and sieve the andalusite into a particle size of 0-1 mm after crushing.

[0037] 2. According to the production demand, weigh 22% andalusite fine powder, 9% calcined alumina fine powder, 4% high alumina fine powder and 10% Guangxi clay according to the mass percentage, and mix the above four raw materials , Grind into a co-grinding powder with a fineness of ≤0.088mm.

[0038] 3. Mix the co-milled powder with calcined mullite with a mass percentage of 30% and a particle size of 1-3mm, and andalusite particles with a mass percentage of 25% and a particle size of 0-1mm to make a mixture.

[0039] 4. Add the binder aluminum dihydrogen phosphate at a ratio of 100:1.5 to the mass of the mixture, and mix for 12 minutes to make a mixed slurry.

[0040] 5. Use a 315t pneumatic press to press the mixed mud into a density > 2.75g / cm 3 of adobe.

[0041] 6. Put the adobe into a drier with an inlet of 80°C and an outle...

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Abstract

The invention discloses an andalusite brick for a carbon anode roasting furnace. The andalusite brick comprises andalusite, calcined mullite, Guangxi clay, fine andalusite powder, calcined alumina powder and high aluminum fine powder. The andalusite brick for a carbon roasting furnace has low thermal expansion, high creep resistance, high high-temperature strength, good high-temperature volume stability, good thermal shock resistance, good chemical erosion resistance and a long service life. The preparation method of the andalusite brick improves a service life of a cathode roaster, reduces refractory material consumption and reduces a production cost.

Description

technical field [0001] The invention belongs to the technical field of carbon roasting furnaces, in particular to an andalusite brick for a carbon anode roasting furnace. Background technique [0002] The role of the carbon roasting furnace is to indirectly heat various carbon products after high pressure molding according to the specified roasting temperature under the condition of isolation of air, so as to improve the mechanical strength, electrical conductivity and high temperature resistance of the carbon products. [0003] At present, the design of domestic carbon roasters is a technology imported from abroad in the 1950s. The flue wall is built with refractory bricks. After more than half a century, it has been adopted by most carbon factories. The early roasters in my country used refractory The material is mainly ordinary clay refractory bricks. In the early 1990s, my country introduced roasting furnace technology from Japan, and the supporting refractory materials f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/63
Inventor 靳艳军彭亚琴孙小军
Owner 河南鑫诚耐火材料股份有限公司
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