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Microporous magnesia-hercynite brick for cement rotary kiln firing zone and preparation method thereof

A magnesium-iron-aluminum spinel and cement rotary kiln technology, which is applied in the field of refractory materials, can solve the problems of high thermal conductivity and large coal consumption, and achieve the effects of reducing thermal conductivity, energy consumption, and heat dissipation

Active Publication Date: 2021-11-05
郑州瑞泰耐火科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a microporous magnesium-iron-aluminum spinel brick for the firing zone of a cement rotary kiln and a preparation method thereof, which has the advantages of lower thermal conductivity and saving coal consumption, and solves the problem of low thermal conductivity. The problem of high and large coal consumption

Method used

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  • Microporous magnesia-hercynite brick for cement rotary kiln firing zone and preparation method thereof
  • Microporous magnesia-hercynite brick for cement rotary kiln firing zone and preparation method thereof

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Effect test

Embodiment 1

[0027] Embodiment 1: A microporous magnesium-iron-aluminum spinel brick for the firing zone of a cement rotary kiln, including the following raw materials in proportions by weight: 30-40% of microporous high-purity magnesia, and the microporous high-purity magnesia is composed of 5 5-10% of ~3mm microporous high-purity magnesia and 20-30% of 3-1mm microporous high-purity magnesia, 30-40% of fused magnesia, and the fused magnesia consists of 20-30 % and 10-20% of 200 mesh fused magnesia, 5-10% of fused iron-aluminum spinel, 1-2% of poly light balls, the poly light balls are 0.1 to 0.3 poly light particles, the industrial Manganese powder is 200 mesh manganese powder, silica sol 1-5%, the pH value of the silica sol is 9.0 to 10.5, the viscosity of the silica sol is less than or equal to 25mpa.s, and the specific gravity of the silica sol is 1.29 to 1.31, Industrial manganese powder 1-2%.

[0028] A method for preparing a microporous magnesium-iron-aluminum spinel brick for a ce...

Embodiment 2

[0036] Embodiment 2: A microporous magnesium-iron-aluminum spinel brick for the firing zone of a cement rotary kiln, comprising the following raw materials in proportions by weight: 30-40% of microporous high-purity magnesia, and the microporous high-purity magnesia is composed of 5 5-10% of ~3mm microporous high-purity magnesia and 20-30% of 3-1mm microporous high-purity magnesia, 30-40% of fused magnesia, and the fused magnesia consists of 20-30 % and 10-20% of 200-mesh fused magnesia, 5-10% of fused iron-aluminum spinel, the industrial manganese powder is 200-mesh manganese powder, 1-5% of silica sol, and the pH of the silica sol The value is 9.0 to 10.5, the viscosity of the silica sol is less than or equal to 25mpa.s, the specific gravity of the silica sol is 1.29 to 1.31, and the industrial manganese powder is 1-2%.

[0037] A method for preparing a microporous magnesium-iron-aluminum spinel brick for a cement rotary kiln firing zone, comprising the following steps:

[...

Embodiment 3

[0045]Embodiment 3: A microporous magnesia-iron-aluminum spinel brick for the firing zone of a cement rotary kiln, comprising the following raw materials in proportions by weight: 30% to 40% of fused magnesia, the fused magnesia consisting of 1 20-30% of ~0mm fused magnesia and 10-20% of 200-mesh fused magnesia, 5-10% of fused iron-aluminum spinel, 1-2% of polylight ball, the polylight ball is 0.1 To 0.3 poly light particles, the industrial manganese powder is 200 mesh manganese powder, 1-5% silica sol, the pH value of the silica sol is 9.0 to 10.5, the viscosity of the silica sol is less than or equal to 25mpa.s, the The proportion of silica sol is 1.29 to 1.31, and industrial manganese powder is 1 to 2%.

[0046] A method for preparing a microporous magnesium-iron-aluminum spinel brick for a cement rotary kiln firing zone, comprising the following steps:

[0047] 1) Take fused magnesia, fused iron-aluminum spinel, industrial manganese powder, polylight balls, and silica sol...

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Abstract

The invention relates to the technical field of refractory materials, and discloses a microporous magnesia-hercynite brick for a cement rotary kiln firing zone, the brick comprises the following raw materials by weight: 30-40% of microporous high-purity magnesia, 30-40% of fused magnesia, 5-10% of fused hercynite, 1-2% of poly light ball, 1-5% of silica sol and 1-2% of industrial manganese powder. The microporous high-purity magnesia is prepared from 5-10 percent of microporous high-purity magnesia of 5-3mm and 20-30 percent of microporous high-purity magnesia of 3-1mm. According to the microporous magnesia-hercynite brick for the cement rotary kiln firing zone and the preparation method thereof, by adding the poly light balls into a mixing mill, the magnesia-hercynite brick has good fire resistance, high high-temperature strength, good thermal stability, various corrosion resistance, small fiber change after re-burning and small heat conductivity coefficient, and after the brick is used, the heat conductivity coefficient of the magnesia-hercynite brick is greatly reduced, and thus the temperature of the cement kiln cylinder is reduced, coal consumption is saved, air pollution is reduced, and the problems of high heat conductivity coefficient and consumption of a large amount of coal are solved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a microporous magnesium-iron-aluminum spinel brick for a firing zone of a cement rotary kiln and a preparation method thereof. Background technique [0002] At present, there are nearly 2,000 dry-process cement rotary kilns in my country, with an average firing zone length of 20m. The annual firing zone bricks are more than 300,000 tons. Now, the form of environmental protection is becoming more and more severe, because hexavalent chromium ions have the risk of carcinogenicity and pose a threat to personal safety, so the chromium-containing refractories used in cement kilns have withdrawn from the stage of history and are basically completely replaced by magnesia-iron-aluminum spinel bricks , Magnesium iron aluminum spinel brick is a chromium-free green product, which also has good kiln skin adhesion performance. [0003] Chinese patent CN201410480173.8 proposes a mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/043C04B35/622C04B2235/3222C04B2235/3262C04B2235/3418C04B2235/9607
Inventor 李沅锦袁林孟凌霄王旭圆张慧芳王佳征高洪兴梁勤君韩波张亚权
Owner 郑州瑞泰耐火科技有限公司
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