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Backing brick for coal water slurry pressurized gasifier and preparation method of backing brick

A technology of pressurized gasification and coal-water slurry, applied in the field of refractory materials, can solve the problems of low service life and poor thermal shock resistance, and achieve the effects of prolonging service life, improving strength and thermal shock resistance.

Active Publication Date: 2013-11-13
洛阳利尔功能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of low service life caused by poor thermal shock resistance of backing bricks in the prior art, the present invention provides a backing brick for coal-water slurry pressurized gasifier and its preparation method

Method used

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  • Backing brick for coal water slurry pressurized gasifier and preparation method of backing brick

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Embodiment 1

[0020] A backing brick for a coal-water slurry pressurized gasifier, which is composed of a material and a binder with a weight of 2% of the material. The material is made of chrome corundum material with a particle size of less than 5mm, and α-Al with a particle size of less than 240 mesh 2 o 3 Micropowder, siliceous material with particle size less than 180 mesh and chromium oxide green are mixed, and the amount of chrome corundum material in the material is 80%, α-Al 2 o 3 The amount of fine powder is 12%, the amount of siliceous material is 5%, and the amount of chromium oxide green is 3%.

[0021] The preparation method of the backing brick for the coal-water slurry pressurized gasifier is as follows:

[0022] 1) According to the above requirements, select and weigh the binder, chrome corundum material, α-Al 2 o 3 powder, siliceous material and chromium oxide green, and then the weighed α-Al 2 o 3 Micropowder, siliceous material and chromium oxide green were mixed f...

Embodiment 2

[0026] A backing brick for a coal-water slurry pressurized gasifier, which is composed of a material and a binder with a weight of 4.5% of the material. The material is made of chrome corundum material with a particle size of less than 5mm and α-Al with a particle size of less than 240 mesh 2 o 3 Micropowder, siliceous material with particle size less than 180 mesh and chromium oxide green are mixed, and the amount of chrome corundum material in the material is 90%, α-Al 2 o 3 The amount of fine powder is 8%, the amount of siliceous material is 1%, and the amount of chromium oxide green is 1%.

[0027] The preparation method of the backing brick for the coal-water slurry pressurized gasifier is as follows:

[0028] 1) According to the above requirements, select and weigh the binder, chrome corundum material, α-Al 2 o 3 powder, siliceous material and chromium oxide green, and then the weighed α-Al 2 o 3 Micropowder, siliceous material and chromium oxide green were mixed f...

Embodiment 3

[0032] A backing brick for a coal-water slurry pressurized gasifier, which is composed of a material and a binder with a weight of 3% of the material. The material is made of chrome corundum material with a particle size of less than 5mm, and α-Al with a particle size of less than 240 mesh 2 o 3 Micropowder, siliceous material with a particle size of less than 180 meshes and chromium oxide green are mixed, and the amount of chrome corundum material in the material is 85%, α-Al 2 o 3 The amount of fine powder is 10%, the amount of siliceous material is 3%, and the amount of chromium oxide green is 2%.

[0033] The preparation method of the backing brick for the coal-water slurry pressurized gasifier is as follows:

[0034] 1) According to the above requirements, select and weigh the binder, chrome corundum material, α-Al 2 o 3 powder, siliceous material and chromium oxide green, and then the weighed α-Al 2 o 3 Micropowder, siliceous material and chromium oxide green were ...

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Abstract

The invention discloses a backing brick for coal water slurry pressurized gasifier and a preparation method of the backing brick. The backing brick is prepared from a chrome corundum material, alpha-Al2o3 micro powder, a siliceous material, chromium oxide green and a binding agent. The preparation method comprises the following steps of: mixing the alpha-Al2o3 micro powder, the siliceous material and the chromium oxide green, mixing the chrome corundum material and the binding agent, uniformly mixing the two mixtures, forming, drying and firing to obtain the product. The backing brick and the preparation method thereof have the advantages that a chrome corundum residue and the siliceous material are adopted to prepare the backing brick under a certain condition, and calcium oxide and silicon oxide in the chrome corundum residue are in the form of low melting materials, can generate a drastic migration effect when a sintering temperature achieves a certain value, and can be filled in air holes of the brick and migrate to the surface of the brick, so that strong applied force can be generated between an aggregate and a powder material, the intensity and a thermal shock resistance property of the material are greatly improved, and the service life of the backing brick is greatly prolonged.

Description

technical field [0001] The invention relates to a refractory brick in the field of refractory materials, in particular to a backing brick for a coal-water slurry pressurized gasifier and a preparation method thereof. Background technique [0002] The cylinder lining of the coal-water slurry pressurized gasifier contains three layers of refractory materials, the innermost layer facing the fire surface, the middle backing brick layer and the thermal insulation brick layer close to the steel shell. As an important part of the inner lining of the coal-water slurry pressurized gasifier, the backing brick layer plays an important role in structural support, heat insulation, and prevention of gas blow-by. At the same time, the brick layer of this layer has a long service life. , it does not need to be replaced during the life of the gasifier, so the layer of bricks is required to have good room temperature strength, high temperature strength and thermal shock stability. [0003] A...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622
Inventor 高耸李有奇张宇翠林莎莎杨付乾张涛李荣磊谢毕强王洋洋金春艳寇志奇赵继增
Owner 洛阳利尔功能材料有限公司
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