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A kind of wear-resistant castable and its preparation and use method

A castable, a technology in the circumferential direction, which is applied in the preparation and construction of wear-resistant castables for the CDQ cooling section, and can solve the inconvenience of wear resistance of lining bricks in the working layer of CDQ, the inability to reflect high temperature performance, and the wear resistance. Insufficient and other problems, to achieve the effect of good thermal shock stability, strong wear resistance, and prolong service life

Active Publication Date: 2021-10-01
MCC5 GROUP SHANGHAI CORPORATION LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mullite bricks have excellent high-temperature performance, and have good performance in high-temperature areas such as the upper middle part of the cooling section, the pre-storage section, and the loading section. The high temperature performance cannot be reflected, but due to its insufficient wear resistance, the wear rate is too fast, resulting in frequent maintenance
[0003] Therefore, there are above-mentioned inconveniences and problems in the known CDQ furnace working layer lining brick wear resistance.

Method used

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  • A kind of wear-resistant castable and its preparation and use method
  • A kind of wear-resistant castable and its preparation and use method
  • A kind of wear-resistant castable and its preparation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A wear-resistant castable, which is used in the middle and low temperature region of the lower part of the cooling section of the dry quenching furnace, and the temperature range is 200-700 ° C. The raw material components and weight percentages are: aggregate 70-74%, matrix 24-30%, Stainless steel heat-resistant fiber 1.4 to 2.0%.

[0054] The composition and weight percentage of the aggregate are: 60-65% of high-purity and low-iron synthetic mullite, and 8-10% of super-grade silicon carbide; the gradation of the aggregate is: high-purity and low-iron synthetic mullite Particle size > 3mm, and ≤ 6mm, accounting for 10-12%, high-purity low-iron synthetic mullite particle size > 1mm, and ≤ 3mm, accounting for 26-30%, high-purity low-iron synthetic mullite The particle size of stone ≤ 1mm accounts for 20-22%, the particle size of super silicon carbide > 1mm and ≤ 3mm accounts for 3%, and the particle size of super silicon carbide ≤ 1mm accounts for 5%.

[0055] The compo...

Embodiment 2

[0058] In this example, the wear-resistant castable components are used: mullite aggregate (3mm<its particle size≤6mm) 1.2Kg, mullite aggregate (1mm<its particle size≤3mm) 2.3Kg, silicon carbide aggregate (1mm<its particle size≤3mm) 0.4Kg, silicon carbide (its particle size≤1mm) 0.6Kg, stainless steel heat-resistant fiber 0.15Kg, high-purity silicon micropowder 0.5Kg, silicon carbide fine powder 0.5Kg, high-purity aluminate 0.5Kg, active α-A12O3 0.4Kg, adding water 0.6Kg. All the other are with embodiment 1.

Embodiment 3

[0060] The preparation method of wear-resistant castable of the present invention comprises the following steps:

[0061] (1) According to the weight percentage of aggregate and fine powder, use high-purity and low-iron synthetic mullite and super silicon carbide as raw material components, add α-A1 2 o 3 Ultra-fine powder, high-purity silica powder, using pure calcium aluminate cement as binder, mix in cement mortar mixer 2 - 3 minutes.

[0062] (2) Add stainless steel heat-resistant fiber to the mixture prepared in step (1), and continue to stir and mix 2 - 3 minutes.

[0063] (3) Slowly add a certain amount of water to the mixture prepared in step (2) and continue stirring 2 - 3 minutes to obtain a uniform castable.

[0064] (4) Detection of wear-resistant castable samples

[0065] 1) Prepare wear-resistant castable samples with castables, vibrate on a vibrating table to form wear-resistant castable samples of 40mm×40mm×160mm, 100mm×l00mm×30mm, 75mm×100mm×100mm, and r...

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Abstract

A wear-resistant castable, which is used in the middle and low temperature region of the lower part of the cooling section of the dry quenching furnace, and the temperature range is 200-700 ° C. The raw material components and weight percentages are: aggregate 70-74%, matrix 24-30%, Stainless steel heat-resistant fiber 1.4-2.0%, characterized in that: the composition and weight percentage of the aggregate are: 60-65% of high-purity and low-iron synthetic mullite, 8-10% of super silicon carbide; Components and weight percentages are: high-purity silicon powder 5-8%, silicon carbide fine powder 4-6%, high-purity aluminate 5-7%, active α-A1 2 o 3 4-6%. The wear-resistant castable and its preparation and use method of the present invention have excellent properties such as low-temperature peeling resistance, high-strength wear resistance, and good thermal shock stability. The construction quality of the wear-resistant castable is safe and reliable, and the construction operation of the castable is simple, making the wear-resistant castable The material is closely combined with the original worn masonry, and has the advantages of strong wear resistance.

Description

technical field [0001] The invention relates to a lining brick for the working layer of a dry quenching furnace, in particular to a preparation and construction method of a wear-resistant castable for a cooling section of a dry quenching coke. Background technique [0002] In the past ten years, CDQ technology in the domestic metallurgical industry has developed rapidly. It is currently the most advanced coke quenching technology. It has three major advantages: improving coke quality, improving the environment, and recovering energy. It is a new technology for green economy and circular economy encouraged by the state. project. In the cooling section of the CDQ furnace, mullite bricks are used as lining bricks for the working layer. Mullite bricks have excellent high-temperature performance, and have good performance in high-temperature areas such as the upper middle part of the cooling section, the pre-storage section, and the loading section. The high temperature perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/76C04B35/66C04B35/185
CPCC04B35/185C04B35/66C04B35/76C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3826C04B2235/5427C04B2235/96C04B2235/9607
Inventor 任社安
Owner MCC5 GROUP SHANGHAI CORPORATION LIMITED
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