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High-strength, high-purity, low-silicon corundum brick for petrochemical industry and preparation method thereof

A silicon corundum brick and a technology of the industry, applied in the field of high-strength, high-purity, low-silicon corundum brick and its preparation, can solve the problems of excessive silicon content, low strength, and high firing temperature, and achieve high strength, high strength, and low firing temperature. Effect

Active Publication Date: 2018-08-10
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

[0004] In view of the above existing high-purity corundum bricks that have problems such as excessive silicon content, high firing temperature, and low strength, the technical problem to be solved by the present invention is to provide a high-purity, high-strength, low-silicon content, and good high-temperature performance. High-strength, low-silicon and high-purity corundum bricks with other advantages

Method used

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  • High-strength, high-purity, low-silicon corundum brick for petrochemical industry and preparation method thereof
  • High-strength, high-purity, low-silicon corundum brick for petrochemical industry and preparation method thereof
  • High-strength, high-purity, low-silicon corundum brick for petrochemical industry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-strength, high-purity, low-silicon corundum brick for the petrochemical industry, which includes the following components by weight percentage:

[0029]

[0030]

[0031] The above-mentioned preparation method of high-strength, high-purity and low-silicon corundum bricks for the petrochemical industry comprises the following steps:

[0032] (1) Fine powder pre-mixing: accurately weigh 150 mesh fused white corundum, 320 mesh fused white corundum, 320 mesh tabular corundum, alumina micropowder, ρ-Al 2 o 3 Mix evenly in the pre-mixer, and set aside after discharge;

[0033] (2) Aggregate mixing: Accurately weigh 5~3mm fused white corundum, 3~1mm fused white corundum, 1~0mm fused white corundum, 3~1mm tabular corundum, 1~0mm tabular corundum according to the formula Add together into the mixer and dry mix for 5 minutes, add 2 / 3 of the amount of aluminum sol, mix for 8 minutes, then add the fine powder obtained after pre-mixing in step (1), stir for 5 minutes,...

Embodiment 2

[0038] A high-strength, high-purity, low-silicon corundum brick for the petrochemical industry, which includes the following components by weight percentage:

[0039]

[0040]

[0041] The above-mentioned preparation method of high-strength, high-purity and low-silicon corundum bricks for the petrochemical industry comprises the following steps:

[0042] (1) Fine powder pre-mixing: accurately weigh 150 mesh fused white corundum, 320 mesh fused white corundum, 320 mesh tabular corundum, alumina micropowder, ρ-Al 2 o 3 Mix evenly in the pre-mixer, and set aside after discharge;

[0043] (2) Aggregate mixing: Accurately weigh 5~3mm fused white corundum, 3~1mm fused white corundum, 1~0mm fused white corundum, 3~1mm tabular corundum, 1~0mm tabular corundum according to the formula Add together into the mixer and dry mix for 3 minutes, add 2 / 3 of the amount of aluminum sol, mix for 5 minutes, then add the fine powder obtained after pre-mixing in step (1), stir for 3 minutes,...

Embodiment 3

[0048] Weigh each component according to the following proportions, and the firing temperature is 1600°C:

[0049]

[0050] The above-mentioned preparation method of high-strength, high-purity and low-silicon corundum bricks for the petrochemical industry comprises the following steps:

[0051](1) Fine powder pre-mixing: accurately weigh 150 mesh fused white corundum, 320 mesh fused white corundum, 320 mesh tabular corundum, alumina micropowder, ρ-Al 2 o 3 Mix evenly in the pre-mixer, and set aside after discharge;

[0052] (2) Aggregate mixing: Accurately weigh 5~3mm fused white corundum, 3~1mm fused white corundum, 1~0mm fused white corundum, 3~1mm tabular corundum, 1~0mm tabular corundum according to the formula Add together into the mixer and dry mix for 5 minutes, add 2 / 3 of the amount of aluminum sol, mix for 10 minutes, then add the fine powder obtained after pre-mixing in step (1), stir for 5 minutes, and then add the remaining 1 / 3 of the amount The aluminum sol,...

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Abstract

The invention discloses a high-strength, high-purity and low-silicon corundum brick for a petrochemical industry. The corundum brick comprises the following components in percentage by weight: 3-6% of 5-3 mm white fused corundum, 15-25% of 3-1 mm white fused corundum, 8-12% of 1-0 mm white fused corundum, 3-8% of 150-mesh white fused corundum, 12-16% of 320-mesh white fused corundum, 15-20% of 3-1 mm tabular corundum, 3-7% of 1-0 mm tabular corundum, 6-11% of 320-mesh tabular corundum, 8-13% of micro alumina powder and 2-5% of rho-Al2O3, wherein the total amount of the components is 100%, and the weight of aluminium collosol accounts for 6-13% of the total weight of the components. The invention further discloses a preparation method for the high-strength, high-purity and low-silicon corundum brick for the petrochemical industry. The high-strength, high-purity and low-silicon corundum brick has the characteristics of being low in firing temperature, low in impurity content, high in strength, and excellent in high-temperature property.

Description

technical field [0001] The invention belongs to refractory materials, and in particular relates to a high-strength, high-purity and low-silicon corundum brick used in the petrochemical industry and a preparation method thereof. Background technique [0002] Corundum bricks are based on α-Al 2 o 3 As the main component, it has the advantages of high refractoriness, high strength, high softening temperature under load, good high temperature creep resistance, stable volume and strong chemical stability, etc. It has been widely used in synthetic ammonia with high temperature, high pressure, chemical erosion and severe mechanical wear Lining of petrochemical thermal equipment such as reformer, ethylene engineering gas generator, methanol reformer, fertilizer plant, carbon black reaction furnace, etc. [0003] High-purity corundum bricks have high purity and are difficult to sinter. High-temperature shuttle kilns must be used for firing at a temperature of 1700 °C or higher, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/10C04B35/622
Inventor 陈磊曾鲁举彭国军邵一平蒋明钱蛇大陈松林吴跃峰闫昕
Owner 宜兴瑞泰耐火材料有限公司
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