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Refractory castable for rotary kiln mouth and kiln head hood

A technology of refractory castables and kiln hoods, applied in the field of refractory castables, can solve the problems of short service life, poor thermal shock resistance, easy wear, etc., achieve good construction performance, solve easy wear, and good burst resistance

Inactive Publication Date: 2014-02-05
NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The refractory castables for the above-mentioned rotary kiln mouth and kiln hood are composed of 30 parts of super-grade bauxite, 10 parts of corundum, 30 parts of mullite, 15 parts of andalusite, and 15 parts of spinel; the aggregate is composed of zircon powder 60 parts, silicon carbide powder 40 parts to form a fine powder, and add alumina micropowder, calcium aluminate cement and add 30 parts of metal aluminum powder, 30 parts of organic explosion-proof fiber, 30 parts of sodium hexametaphosphate and 10 parts of heat-resistant steel fiber Composed of admixtures, this can make the mechanical strength, wear resistance and thermal shock resistance of the refractory castable achieve a better balance, so that the castable can obtain excellent comprehensive performance, and effectively solve the problem of the kiln mouth and kiln in front of the rotary kiln. The existing refractory castables for the hood are easy to wear, have poor thermal shock resistance or low strength, and have short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A refractory castable for the kiln mouth and kiln head cover of a rotary kiln, including aggregate, fine powder, oxide powder, binder and admixture. The particle size of the aggregate is 1 mm, and the particle size of the fine powder is 0.5 mm. The particle size of the fine powder is 2 μm, the particle size of the binder is 0.01 mm, the amount of each component added by weight ratio is: 40 parts of aggregate, 40 parts of fine powder, 15 parts of oxide fine powder, 2.5 parts of binder, and 2.5 parts of admixture The fine powder is composed of 60 parts of zircon powder and 40 parts of silicon carbide powder; the oxide fine powder includes alumina fine powder; the binder is calcium aluminate cement with an alumina content of 80%; the admixture It consists of 30 parts of metal aluminum powder, 30 parts of organic explosion-proof fiber, 30 parts of sodium hexametaphosphate and 10 parts of heat-resistant steel fiber.

Embodiment 2

[0012] A refractory castable for rotary kiln mouth and kiln head cover, including aggregate, fine powder, oxide micropowder, binder and admixture, the particle size of the aggregate is 3mm, the particle size of the fine powder is less than 0.6mm, and the oxidized The particle size of the fine powder is 3 μm, the particle size of the binder is 0.03, and the weight ratio of each component is: 46 parts of aggregate, 38 parts of fine powder, 12 parts of oxide powder, 2 parts of binder, and 2 parts of admixture; The fine powder is composed of 60 parts of zircon powder and 40 parts of silicon carbide powder; the oxide fine powder includes alumina fine powder and silicon oxide, and the weight ratio of alumina fine powder and silicon oxide is 4:1; the binding agent is Calcium aluminate cement with an alumina content of 80%; the admixture consists of 30 parts of metal aluminum powder, 30 parts of organic explosion-proof fiber, 30 parts of sodium hexametaphosphate and 10 parts of heat-re...

Embodiment 3

[0014] A refractory castable for the kiln mouth and kiln head cover of a rotary kiln, including aggregate, fine powder, oxide powder, binder and admixture, the particle size of the aggregate is 5mm, the particle size of the fine powder is 0.9mm, and the oxide The particle size of the micropowder is 4 μm, the particle size of the binder is 0.05mm, and the amount of each component added by weight ratio is: 50 parts of aggregate, 35 parts of fine powder, 12 parts of oxide micropowder, 1 part of binder, and 2 parts of admixture; Among them, the aggregate is composed of 30 parts of super alumina, 10 parts of corundum, 30 parts of mullite, 15 parts of andalusite, and 15 parts of spinel; the fine powder is composed of 60 parts of zircon powder and 40 parts of silicon carbide powder ; The oxide micropowder includes alumina micropowder; the binder is calcium aluminate cement with an alumina content of 80%; 10 parts and 10 parts of heat-resistant steel fiber.

[0015] Sodium hexametaph...

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PUM

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Abstract

The invention provides a refractory castable for a rotary kiln mouth and a kiln head hood. The refractory castable comprises the following components in parts by weight: 40-50 parts of aggregate, 25-40 parts of fine powder, 6-15 parts of oxide micro powder, 1-3 parts of binding agent and 2-2.5 parts of additives, wherein the aggregate is composed of 30 parts of special-grade alumina, 10 parts of corundum, 30 parts of mullite, 15 parts of andalusite and 15 parts of spinel; the fine powder is composed of 60 parts of zirconite powder and 40 parts of silicon carbide powder; the oxide micro powder comprises aluminum oxide micro powder; the binding agent is calcium aluminate cement in which the content of aluminum oxide is 80%; and the additives are composed of 30 parts of metal aluminum powder, 30 parts of organic anti-explosion fibers, 30 parts of sodium hexametaphosphate and 10 parts of heat-resistant steel fibers.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory castable for a rotary kiln mouth and a kiln head cover. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, so they are widely used in the world. It has developed rapidly, and its proportion in the whole refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, Fran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 穆祥王西来董伟胜刘文艳解仁刘朝晖苏新国王淑娟
Owner NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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