Special castable for silicon-free gasifying furnace and preparation method of castable

A castable and gasifier technology, applied in the field of refractory castables, can solve the problems of increasing the reserve amount of purchase and supply, limiting the use of castables, increasing the cost of use, etc., so as to improve the efficiency of masonry construction, reduce the reserve amount, and increase the strength. Effect

Pending Publication Date: 2019-03-22
中国有色集团晋铝耐材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the materials used in gasification furnaces mainly include high-chrome bricks and low-chrome bricks. These materials have relatively stable performance, but the price is high, and the brick shapes are complex and diverse, which causes troubles for construction and masonry. The construction efficiency is low, the consumption is large, and the increase This increases the cost of using
Moreover, these refractory castable materials are basically silicon-aluminum series products, and the additives used basically contain SiO 2 , which limits the use of castables on gasifiers

Method used

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  • Special castable for silicon-free gasifying furnace and preparation method of castable
  • Special castable for silicon-free gasifying furnace and preparation method of castable
  • Special castable for silicon-free gasifying furnace and preparation method of castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A special castable for silicon-free gasification furnaces, comprising the following raw materials in parts by weight:

[0032] 47 parts of fused corundum aggregate, 23 parts of chrome corundum aggregate, 10 parts of fused corundum powder, 8 parts of chrome corundum powder, 7 parts of activated alumina micropowder, 5 parts of pure calcium aluminate cement CA-70, composite alumina 0.8 parts of fine powder dispersant, 4.1 parts of water.

[0033] Al in the fused corundum aggregate 2 o 3 The weight percentage is 99%, and the bulk density is 3.9g / cm 3 , the particle size is 1-8mm.

[0034] Al in the fused corundum powder 2 o 3 The weight percentage is 99%, and the bulk density is 3.9g / cm 3 .

[0035] Cr in the chromium corundum aggregate 2 o 3 with Al 2 o 3 The sum of the weight percentages is 94%, and the bulk density is 3.6g / cm 3 , the particle size is 1~3mm.

[0036] Cr in the chromium corundum powder 2 o 3 with Al 2 o 3 The sum of the weight percentages ...

Embodiment 2

[0048] A special castable for silicon-free gasification furnaces, comprising the following raw materials in parts by weight:

[0049] 45 parts of fused corundum aggregate, 25 parts of chrome corundum aggregate, 8 parts of fused corundum powder, 10 parts of chrome corundum powder, 7 parts of activated alumina micropowder, 5 parts of pure calcium aluminate cement CA-70, composite alumina 0.8 parts of fine powder dispersant, 4 parts of water.

[0050] Al in the fused corundum aggregate 2 o 3 The weight percentage is 99%, and the bulk density is 4g / cm 3 , the particle size is 1-8mm.

[0051] Al in the fused corundum powder 2 o 3 The weight percentage is 99%, and the bulk density is 4g / cm 3 .

[0052] Cr in the chromium corundum aggregate 2 o 3 with Al 2 o 3 The sum of the weight percentages is 95%, and the bulk density is 3.8g / cm 3 , the particle size is 1~3mm.

[0053] Cr in the chromium corundum powder 2 o 3 with Al 2 o 3 The sum of the weight percentages is 95%...

Embodiment 3

[0065] A special castable for silicon-free gasification furnaces, comprising the following raw materials in parts by weight:

[0066] 43 parts of fused corundum aggregate, 27 parts of chrome corundum aggregate, 6 parts of fused corundum powder, 12 parts of chrome corundum powder, 7 parts of activated alumina micropowder, 5 parts of pure calcium aluminate cement CA-70, composite alumina 0.8 parts of fine powder dispersant, 4.2 parts of water.

[0067] Al in the fused corundum aggregate 2 o 3 The weight percentage is 99.2%, and the bulk density is 4.2g / cm 3 , the particle size is 1-8mm.

[0068] Al in the fused corundum powder 2 o 3 The weight percentage is 99.2%, and the bulk density is 4.2g / cm 3 .

[0069] Cr in the chromium corundum aggregate 2 o 3 with Al 2 o 3 The sum of the weight percentages is 95.5%, and the bulk density is 3.85g / cm 3 , the particle size is 1~3mm.

[0070] Cr in the chromium corundum powder 2 o 3 with Al 2 o 3 The sum of the weight perce...

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Abstract

The invention particularly relates to a special castable for a silicon-free gasifying furnace and a preparation method of the castable, belongs to the technical field of refractory castables, and aimsto provide the special castable for the silicon-free gasifying furnace which has the resistance to the corrosion and penetration of molten slag and strong erosive wear resistance and the preparationmethod of the castable. According to the technical scheme, the special castable for the silicon-free gasifying furnace is prepared from the following raw materials in parts by weight: 30 to 50 parts of electric-smelting corundum aggregate, 15 to 40 parts of chrome corundum aggregate, 5 to 25 parts of electric-smelting corundum powder, 3 to 20 parts of chrome corundum powder, 2 to 18 parts of activated alumina micro-powder, 2 to 12 parts of pure calcium aluminate cement CA-70, 0.1 to 2 parts of a compound alumina micro-powder dispersant and 2 to 8 parts of water. The invention discloses the preparation method of the special castable for the silicon-free gasifying furnace. By adopting the special castable for the silicon-free gasifying furnace prepared with the preparation method, the masonry construction efficiency can be improved, the using cost can be reduced, and the service life of the castable can be ensured.

Description

technical field [0001] The invention relates to the technical field of refractory castables, in particular to a special castable for silicon-free gasification furnaces and a preparation method thereof. Background technique [0002] The gasifier is the key equipment used in the production of fertilizer, petroleum, chemical and other industries. The performance parameters of the refractory lining directly affect the stability and service life of the gasifier. The operating environment of the gasifier is extremely harsh, requiring high temperature, high pressure, strong reducing atmosphere and liquid acid slagging, accompanied by high-speed erosion of solids, liquids and gases, and there are large temperature and pressure fluctuations when starting and stopping. Therefore, in such a harsh environment, strict requirements are put forward for the refractory materials of the gasifier, and the refractory materials are required to have high permeability of slag erosion resistance an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/77C04B2235/96C04B2235/9607
Inventor 阮克胜
Owner 中国有色集团晋铝耐材有限公司
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