Plugging brick for top opening of water-coal slurry gasification furnace and preparation process thereof

A gasifier and coal-water slurry technology, applied in the field of refractory materials, can solve the problems of reduced service life of vault bricks, mismatched furnace openings, and easy damage to vault bricks, etc., and achieves high compressive strength, corrosion resistance and Excellent flushing performance and long service life

Inactive Publication Date: 2015-04-01
宜兴瑞泰耐火材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sintering process is not only accompanied by a large volume change, which does not match the size of the furnace mouth, but also adheres to and sinters with the surrounding vault chrome 90 bricks, which makes it difficult to pull out the blocking bricks when the gasifier is shut down. Pull off the half, then smash the remaining half with a pickaxe and drop it into the furnace
It is easy to damage the surrounding vault bricks in the process of breaking the remaining half-blocking bricks, resulting in a reduction in the service life of the vault bricks
In addition, prefabricated blocking bricks or cast blocking bricks need to be preheated before use to prevent them from being directly inserted into the furnace mouth from a cold state and bursting, which is more cumbersome to use

Method used

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  • Plugging brick for top opening of water-coal slurry gasification furnace and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Ingredients as follows:

[0043] (1) Fused chromium oxide particles with a particle size of 5-0mm, 66%

[0044] (2) Fused chromium oxide fine powder with a particle size of 180 mesh, 14%

[0045] (3) Chrome oxide green with a particle size of 200 mesh, 10%

[0046] (4) Zirconia fine powder with a particle size of 200 mesh, 5%

[0047] (5) Activated α-alumina micropowder with a particle size of 1000 meshes, 5%

[0048] Plus:

[0049] The sum of the weight percentages of the above components is 100%, and it is preferable to additionally add the following components in weight percentages, and the calculation basis of the added amount is the sum of the weights of the above components.

[0050] (6) ρ-activated alumina powder, 1%

[0051] (7) Adding composite additives (calcium lignosulfonate and polycarboxylic acid 1: 2 ratio mixture), 0.16%

[0052] (8) Aluminum dihydrogen phosphate, 3.5%

[0053] The specific process is as follows:

[0054] (1) Pre-mixed fine powde...

Embodiment 2

[0063] Ingredients as follows:

[0064] (1) Fused chromium oxide particles with a particle size of 5-0mm, 61%

[0065] (2) Fused chromium oxide fine powder with a particle size of 180 meshes, 18%

[0066] (3) Chrome oxide green with a particle size of 200 mesh, 12%

[0067] (4) Zirconia fine powder with a particle size of 200 mesh, 4%

[0068] (5) Activated α-alumina micropowder with a particle size of 1000 meshes, 5%

[0069] Plus:

[0070] The sum of the weight percentages of the above components is 100%, and it is preferable to additionally add the following components in weight percentages, and the calculation basis of the added amount is the sum of the weights of the above components.

[0071] (6) ρ-activated alumina powder, 1.8%

[0072] (7) Adding composite additives (calcium lignosulfonate and polycarboxylic acid 1: 2 ratio mixture), 0.2%

[0073] (8) Aluminum dihydrogen phosphate, 3.8%

[0074] The specific process is as follows:

[0075] (1) Pre-mixed fine po...

Embodiment 3

[0084] Ingredients as follows:

[0085] (1) Fused chromium oxide particles with a particle size of 5-0mm, 68%

[0086] (2) Fused chromium oxide fine powder with a particle size of 180 mesh, 15%

[0087] (3) Chrome oxide green with a particle size of 200 mesh, 8%

[0088] (4) Zirconia fine powder with a particle size of 200 meshes, 6%

[0089] (5) Activated α-alumina micropowder with a particle size of 1000 meshes, 3%

[0090] Plus:

[0091] The sum of the weight percentages of the above components is 100%, and it is preferable to additionally add the following components in weight percentages, and the calculation basis of the added amount is the sum of the weights of the above components.

[0092] (6) ρ-activated alumina powder, 2%

[0093] (7) Adding composite additives (calcium lignosulfonate and polycarboxylic acid 1: 2 ratio mixture), 0.22%

[0094] (8) Aluminum dihydrogen phosphate, 3.4%

[0095] The specific process is as follows:

[0096] (1) Pre-mixed fine powd...

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Abstract

The invention relates to a plugging brick for the top opening of a water-coal slurry gasification furnace and a preparation process thereof. The plugging brick comprises 60-70% of 0-5-millimeter particles of fused chromium oxide, 10-20% of 180-mesh fine powder of fused chromium oxide, 8-13% of 200-mesh chromium oxide green, 1-8% of 200-mesh fine powder of zirconium oxide and 3-8% of 1,000-mesh micro powder of active alpha-alumina, and the plugging brick further comprises 1-2% of micro powder of active rho-alumina, 0.15-0.25% of a compound additive in which the ratio of calcium lignosulphonate to polycarboxylic acid is 1:2 and 3-4% of solution of aluminium dihydrogen phosphate, wherein the specific surface area of the micro powder of active rho-alumina is 200m<2> / g, and the specific gravity of the solution of aluminium dihydrogen phosphate is more than or equal to 1.85. The preparation process of the plugging brick comprises the following steps: premixing fine powder, mixing aggregates, ageing, molding, drying, sintering, assembling and processing. The plugging brick has high compressive strength and excellent corrosion and erosion resistance, is reusable, basically has the same volume as a plugging brick which has a high content of chromium of 90% and is used for the top opening of a water-coal slurry gasification furnace and is beneficial to prolonging the service life of the top opening of a water-coal slurry gasification furnace and keeping the top opening of a water-coal slurry gasification furnace intact.

Description

technical field [0001] The invention belongs to refractory materials, and in particular relates to a top plugging brick of a coal-water slurry gasification furnace and a preparation process thereof. Background technique [0002] Crude oil resources have already occupied an important strategic position in a country, but the price of crude oil in the world today remains high, and scientific researchers from various countries have been developing alternative products. Coal-water slurry gasification technology using relatively cheap coal as the main raw material to produce oil, gas, ethylene, acetic acid, methanol, synthetic ammonia, etc. has become a hot research field, especially in my country, where crude oil resources are insufficient, but coal reserves are very rich. Therefore, coal-water slurry gasification technology is particularly important in our country. This technology can make full use of coal resources, is energy-saving and environmentally friendly, and has broad ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622
Inventor 钱蛇大曾鲁举吴忠阳陈磊彭国军张伯南陈松林周祖明闫昕
Owner 宜兴瑞泰耐火材料有限公司
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