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Lightweight glazed acid-resistant brick and preparation method thereof

An acid-resistant brick and glaze technology, applied in the field of refractory and anti-corrosion materials, can solve the problems of lowering temperature, shortening the service life of chimneys, acid-resistant bricks being easily invaded by corrosion, etc., and achieving the effect of improving service life and excellent corrosion resistance.

Inactive Publication Date: 2016-06-15
无锡市德林环保集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the internal temperature of the chimney after the desulfurization device has been significantly reduced. The water vapor in the chimney cannot evaporate due to the natural temperature conditions, and is easy to be adsorbed on the acid-resistant brick. Because the water vapor contains various harmful chemical components, the acid-resistant brick is easy to be destroyed. Corrosion intrusion, which shortens the life of the chimney

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A light-weight glazed acid-resistant brick, characterized in that the raw materials are calculated by weight percentage, including: SiO 2 Powder 40%, Al 2 O3 powder 20%, Fe 2 O3 powder 30%, super mullite 5% and china clay 5%, the SiO 2 The particle size of powder is 300-500 mesh, Al 2 The particle size of O3 powder is 250-400 mesh, Fe 2 The particle size of O3 powder is 350-500 mesh, the particle size of super mullite is 5-20 mesh, and the particle size of china clay is 2-10 mesh.

[0017] The preparation method of the above-mentioned light-weight glazed acid-resistant brick comprises the following steps:

[0018] A. Pulverize and screen the above raw materials, and mix them according to the specified ratio;

[0019] B. the above-mentioned mixture is added into the clean water of 7% by weight and stirred in a beater for 60 minutes to make mixed mud;

[0020] C. the above-mentioned mixed mud material is made into adobe with a press;

[0021] D. Glaze the surface a...

Embodiment 2

[0026] A light-weight glazed acid-resistant brick, characterized in that the raw materials are calculated by weight percentage, including: SiO 2 Powder 30%, Al 2 O3 powder 25%, Fe 2 O3 powder 30%, super mullite 5% and china clay 10%, the SiO 2 The particle size of powder is 300-500 mesh, Al 2 The particle size of O3 powder is 250-400 mesh, Fe 2 The particle size of O3 powder is 350-500 mesh, the particle size of super mullite is 5-20 mesh, and the particle size of china clay is 2-10 mesh.

[0027] The preparation method of the above-mentioned light-weight glazed acid-resistant brick comprises the following steps:

[0028] A. Pulverize and screen the above raw materials, and mix them according to the specified ratio;

[0029] B. Add the clean water of 7% by weight to the mixture and stir in a beater for 55 minutes to make mixed mud;

[0030] C. the above-mentioned mixed mud material is made into adobe with a press;

[0031] D. Glaze the surface after the above-mentioned ...

Embodiment 3

[0036] A light-weight glazed acid-resistant brick, characterized in that the raw materials are calculated by weight percentage, including: SiO 2 Powder 35%, Al 2 O3 powder 20%, Fe 2 O3 powder 33%, super mullite 7% and china clay 5%, the SiO 2 The particle size of powder is 300-500 mesh, Al 2 The particle size of O3 powder is 250-400 mesh, Fe 2 The particle size of O3 powder is 350-500 mesh, the particle size of super mullite is 5-20 mesh, and the particle size of china clay is 2-10 mesh.

[0037] The preparation method of the above-mentioned light-weight glazed acid-resistant brick comprises the following steps:

[0038] A. Pulverize and screen the above raw materials, and mix them according to the specified ratio;

[0039] B. the above-mentioned mixture is added the clean water of 8% by weight and stirred in a beater for 50 minutes to make mixed mud;

[0040] C. the above-mentioned mixed mud material is made into adobe with a press;

[0041] D. Glaze the surface after ...

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Abstract

The present invention discloses a lightweight glazed acid-resistant brick. The brick is characterized by comprising the following raw materials in weight percentages: 30-40% of SiO<2> powder, 20-30% of Al<2>O<3> powder, 30-35% of Fe<2>O<3> powder, 5-10% of super grade mullite and 5-10% of porcelain clay. The high-quality and acid-resistant materials are used as raw materials, rigorous technology processes are used, so that the brick has excellent corrosion resistance, erosion resistance and thermal shock resistance, is suitable for the uses of chimneys with high, medium and low temperatures, and can greatly increase the service life of the chimneys. The physical and chemical indicators of the lightweight glazed acid-resistant brick is as follows: a cold compressive strength is more than or equal to 30 MPa, a water absorption rate is less than or equal to 6.5%, a volume density is less than or equal to 1.8 g / cm<3>, an acid-resistant degree is more than or equal to 99%, and a thermal conductivity is 0.7 W / m.k.

Description

technical field [0001] The invention relates to a fire-resistant and anti-corrosion material, in particular to a light-weight glazed acid-resistant brick for a chimney and a preparation method thereof. Background technique [0002] Acid-resistant bricks are widely used in metallurgy, electric power and chemical industries, mainly used in chimney lining, coke oven roof, chemical anticorrosion tank, coke cooling platform, coke quenching tower lining and other parts. As the State Environmental Protection Administration has put forward higher requirements for the discharge of sulfur dioxide, the desulfurization devices of major enterprises also need to be continuously improved. At the same time, it also brings about the problem of using acid-resistant bricks inside the chimney. The temperature at the outlet of the duct and the top outlet is relatively high. Traditional acid-resistant bricks do not need to be glazed. The water vapor in the chimney is dried at high temperature and...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B41/86
Inventor 周东平
Owner 无锡市德林环保集团有限公司
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