Coal-injection duct precast brick pouring material

A technology of castables and prefabricated bricks, which is applied in the field of prefabricated brick castables for coal injection pipes, can solve the problems of harsh working environment of refractory materials, affecting the operation cycle of rotary kiln, high temperature, etc., and achieves excellent peeling resistance and erosion resistance. Good for promotion and low manufacturing cost

Inactive Publication Date: 2014-10-22
CHANGXING SANZHONG KILN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the castables for coal injection pipes were made of special castables for coal injection pipes, which were poured on site, especially at the head of coal injection pipes, where the temperature is high, easy to crack and peel off, especially in this part, the working environment of refractory materials is even worse. The general lifespan of currently used materials (including some imported materials) is only 3 to 4 months, which affects the operation cycle of the rotary kiln and has become the key to urgent solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: The prefabricated brick castable for coal injection pipes includes the following components and the weight percentage of each component is: white corundum 60%, mullite 10%, corundum fine powder 10%, fused spinel 5% , silicon carbide 5%, admixture 10%.

Embodiment 2

[0014] Example 2: The castable for the prefabricated brick of the coal injection pipe includes the following components and the weight percentage of each component is: 56% of white corundum, 12% of mullite, 12% of corundum fine powder, and 6% of fused spinel , silicon carbide 4%, admixture 10%.

Embodiment 3

[0015] Example 3: The prefabricated brick castable for the coal injection pipe includes the following components and the weight percentage of each component is: white corundum 50%, mullite 15%, corundum fine powder 15%, fused spinel 5% , silicon carbide 5%, admixture 10%.

[0016] The process of prefabricating bricks using the sintered coal-injection pipe of the present invention: first pile the castables into 500mm and 800mm silicon, then bake at 1100 degrees, and directly build bricks during construction, which can greatly shorten the construction period.

[0017] The technical indicators of prefabricated bricks made by the present invention:

[0018] Maximum operating temperature (°C): 1600;

[0019] Bulk density (Kg / m 3 ):2.70;

[0020] Cold compressive strength (Mpa): ≥100 at 110°C*24h; ≥110 at 1100°C*3h;

[0021] Linear change rate (%): ±0.3 at 1100°C*3h; ±0.5 at 1500°C*3h;

[0022] Thermal conductivity [w / (m.k)]: 0.79 at 600°C.

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Abstract

The invention discloses a coal-injection duct precast brick pouring material. The coal-injection duct precast brick pouring material comprises, by weight, 50-60% of white corundum, 10-15% of mullite, 10-15% of fine corundum powder, 4-6% of fused spinel, 4-6% of silicon carbide and 8-10% of an additive. The coal-injection duct precast brick pouring material has the advantages of high strength, high temperature resistance, wear resistance, stable product performances and long life.

Description

technical field [0001] The invention relates to a prefabricated brick pouring material for a coal injection pipe. technical background [0002] In the past, the castables for coal injection pipes were made of special castables for coal injection pipes, which were poured on site, especially at the head of coal injection pipes, where the temperature is high, easy to crack and peel off, especially in this part, the working environment of refractory materials is even worse. Currently used materials (including some imported materials) generally have a lifespan of only 3 to 4 months, which affects the operation cycle of the rotary kiln and has become an urgent problem to be solved. Contents of the invention [0003] The technical problem solved by the invention provides a high-strength, high-temperature-resistant, wear-resistant and long-life coal injection pipe prefabricated brick castable. [0004] In order to solve the above-mentioned technical problems, the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 杨宏飞
Owner CHANGXING SANZHONG KILN TECH
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