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Chromium-alumina-carbon bricks and preparation method therefor

A chrome-aluminum-carbon brick and high-chromium technology, applied in the field of chrome-aluminum-carbon bricks and their preparation, can solve the problems of reducing the thermal shock performance of high chrome bricks, achieve thermal shock resistance improvement, reduce porosity, normal temperature and high temperature Strong effect

Active Publication Date: 2016-05-04
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

Theoretically, there are many ways to improve the thermal shock performance of refractory materials, such as enhancing the uniformity of materials and reducing internal defects. , can effectively block the penetration of ash and slag components, and slow down the peeling and damage of high chrome bricks, but it will reduce the thermal shock performance of high chrome bricks

Method used

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  • Chromium-alumina-carbon bricks and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The components of a new chrome-aluminum carbon brick formula are as follows:

[0031] 5-1 47 parts of fused high chromium sand particles

[0032] 1~0 18 parts of fused high chromium sand particles

[0033] 18 parts of fused high chromium sand fine powder

[0034] 8 parts of alumina micropowder

[0035] 1 part aluminum powder

[0036] Zirconia micropowder: 3 parts

[0037] Graphite powder: 1 part

[0038] 4 parts chrome green

[0039] Add 2 parts of binder.

[0040] The preparation process of a new type of chrome-aluminum carbon brick is as follows:

[0041] 1. Ingredients: Weigh each raw material according to the formula requirements;

[0042] 2. Pre-mixing: add the weighed matrix fine powder into the vibrating ball mill for pre-mixing, and the mixing time is 30-60 minutes;

[0043] 3. Particle pre-packing: pre-mix aggregate particles with a particle size of 1mm or more, then add resin or pulp waste liquid binder, mix well, add metal aluminum powder, and contin...

Embodiment 2

[0049] The components of a new chrome-aluminum carbon brick formula are as follows:

[0050] 5-1 45 parts of fused high chromium sand particles

[0051] 1~0 20 parts of fused high chromium sand particles

[0052] 18 parts of fused high chromium sand fine powder

[0053] Aluminum oxide powder 6 parts

[0054] 1 part aluminum powder

[0055] Zirconia micropowder: 2 parts

[0056] Graphite powder: 2 parts

[0057] 6 parts chrome green

[0058] Add 2 parts of binder.

[0059] The preparation process of the above-mentioned a kind of backing aluminum-chromium-silica brick for pressurized coal-water slurry gasifier is the same as that in Example 1.

Embodiment 3

[0061] The components of a new chrome-aluminum carbon brick formula are:

[0062] 5-1 45 parts of fused high chromium sand particles

[0063] 1~0 20 parts of fused high chromium sand particles

[0064] 14 parts of fused high chromium sand fine powder

[0065] 10 parts of alumina micropowder

[0066] 0.5 parts of metal aluminum powder

[0067] Zirconia micropowder: 3 parts

[0068] Graphite powder: 1.5 parts

[0069] 6 parts chrome green

[0070] Add 2 parts of binder.

[0071] The preparation process of the aforesaid coal-water slurry pressurized gasifier with backing aluminum-chromium-silica brick is the same as that in Example 1.

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Abstract

The invention discloses chromium-alumina-carbon bricks and a preparation method therefor and relates to the chromium-alumina-carbon bricks. The chromium-alumina-carbon bricks are prepared from the following ingredients in percentage by mass: 75-90% of electric-melted high-chromium sand materials, of which the granularity of each is 5-0 mesh and 240 meshes, 3-8% of alpha-Al2O3 micropowder, 0.1-6% of zirconia micropowder, 0.1-3% of metal aluminum powder material, of which the granularity is smaller than 180 meshes, 0.1-3% of graphite powder, 3-8% of chrome oxide green and 2-4% of additional binder. The chromium-alumina-carbon bricks are prepared through the preparing steps of carrying out material proportioning, carrying out fine-powder premixing, carrying out granule pre-wrapping, carrying out mixing, carrying out molding, carrying out drying and carrying out burning. According to the chromium-alumina-carbon bricks and the preparation method therefor, the aims of greatly improving thermal shock resistance and prolonging service lives are achieved.

Description

【Technical field】 [0001] The invention relates to a chrome-aluminum carbon brick for a coal-water slurry pressurized gasifier, and relates to a chrome-aluminum carbon brick and a preparation method thereof. 【Background technique】 [0002] As we all know, most of the coal gasification technologies currently used in my country are the pressurized Texaco coal-water slurry gasification process with high efficiency and good gas composition and the multi-nozzle coal-water slurry pressurized gasification technology with independent intellectual property rights. ; The gasifier linings of these two gasification technologies are all chrome-aluminum-zirconium bricks, that is, high-chrome bricks. Now the industry has formed a consensus that the use of high chrome bricks lining the gasifier is a very important factor that determines the operating economy and reliability of the entire system. With the development of the coal chemical industry, the number of pressurized coal-water slurry g...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/047C04B35/65
CPCC04B35/0473C04B35/651C04B35/66C04B2235/3217C04B2235/3241C04B2235/3244C04B2235/402C04B2235/425C04B2235/96
Inventor 高耸李有奇张亚栋杨付乾张涛阎彬彬杨参张宇翠姚晨臣
Owner 洛阳利尔功能材料有限公司
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