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Novel mullite brick and preparation method thereof

A technology of mullite brick and sintered mullite, which is applied in the field of mullite brick and its preparation, can solve the problems of insufficient high-temperature structural strength, non-wear resistance, erosion, etc., and achieve improved thermal shock stability and erosion resistance , the effect of improving high temperature structural performance and excellent high temperature performance

Active Publication Date: 2014-08-13
郑州瑞泰耐火科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, all silica bricks use first-grade or super-grade bauxite, and some of them are added with fused corundum as the main raw material. The main problems are: easy to break, insufficient structural strength at high temperature, easy to be eroded by cement clinker liquid phase and other elements, The high thermal conductivity makes the cement kiln fuel consumption higher per ton, resulting in energy waste, silicon carbide oxidation at high temperature causes structural deterioration, the main mineral phase is corundum, and it is not wear-resistant at high temperature

Method used

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  • Novel mullite brick and preparation method thereof
  • Novel mullite brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of mullite brick, it is prepared by aggregate, powder and anti-oxidant plus novel binding agent according to the following weight ratio and method:

[0017] Ratio: 55 parts of aggregate, including 10 parts of sintered mullite with a particle size of 0-1mm, 20 parts of sintered mullite with a particle size of 1-3mm, 25 parts of sintered mullite with a particle size of 3-5mm, and sintered mullite with a particle size of 1-3mm. The mass percentage of chemical composition is: mullite phase 80-90%, Fe 2 o 3 2 O+Na 2 O97%; 3 parts of antioxidant , the antioxidant is metal aluminum powder and metal silicon powder mixed uniformly in a weight ratio of 1 to 2:1, and its average particle size is 2 O2 >30%.

[0018] Preparation:

[0019] The first step is to mix the formula amount of aggregate evenly and add the formula amount of new binder, mix and grind for 3 minutes, then add the formula amount of powder, and continue to mix and grind for 5 minutes to obtain a semi-f...

Embodiment 2

[0026] A kind of mullite brick, it is prepared by aggregate, powder and anti-oxidant plus novel binding agent according to the following weight ratio and method:

[0027] Ratio: 55 parts of aggregate, including 15 parts of sintered mullite with a particle size of 0-1 mm, 20 parts of sintered mullite with a particle size of 1-3 mm, 20 parts of sintered mullite with a particle size of 3-5 mm, and sintered mullite with a particle size of 1-3 mm. The mass percentage of chemical composition is: mullite phase 80-90%, Fe 2 o 3 2 O+Na 2 O97%; 5 parts of antioxidant , the antioxidant is metal aluminum powder and metal silicon powder mixed uniformly in a weight ratio of 1 to 2:1, and its average particle size is 2 O2 >30%.

[0028] The preparation method is the same as in Example 1.

[0029] Implementation Effect:

[0030]

[0031] From above-mentioned embodiment 1, embodiment 2 can find out that each index of product of the present invention is all greater than common 1680 sil...

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Abstract

The present invention discloses a novel mullite brick and a preparation method thereof, wherein low thermal conductivity mullite is adopted as a main raw material, a small amount of silicon carbide is added, and a novel binder is adopted to replace clay. Compared with the similar product, the product of the present invention has characteristics of low thermal conductivity and high strength. In addition, according to the present invention, relying on excellent high temperature performances of the mullite, thermal shock resistance and erosion resistance of the product are substantially increased, and a service life of the product is prolonged.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a mullite brick and a preparation method thereof. Background technique [0002] At present, silica bricks are basically used in the front and rear transition zones of cement kilns, but because cement kilns mostly use anthracite with high combustion value as fuel, anthracite has low volatile content, high ignition temperature, and is not easy to burn. The belt is moved back, so that the operating temperature of the transition zone exceeds the normal level. Due to the large temperature difference, there is high and frequent thermal stress, and there is no stable kiln skin protection, and the sulfur, alkali, and salt melts are easy to corrode the brick body, and even penetrate into the inside of the brick, destroying its organizational structure; The silicon molybdenum bricks in this part are damaged quickly. [0003] At present, all silica bricks use first-grade or s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/622
Inventor 郑建立李全有赵洪亮万远翔李沅锦
Owner 郑州瑞泰耐火科技有限公司
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