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Refractory castable for kilneye and kiln head cover of rotary kiln

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: 2012-09-19
LUOYANG INST OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of short service life of the existing rotary kiln front mouth and kiln hood due to materials and use environment, the present invention provides a refractory castable for the rotary kiln mouth and kiln hood. The scientific and reasonable multi-phase technology enables the castable to obtain excellent comprehensive performance, which can effectively solve the problem of easy wear, poor thermal shock resistance or low strength and short service life of the existing refractory castables used in the front mouth of the rotary kiln and the kiln hood. and other shortcomings

Method used

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  • Refractory castable for kilneye and kiln head cover of rotary kiln

Examples

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Effect test

Embodiment 1

[0022] A refractory castable for the kiln mouth and kiln head cover of a rotary kiln, which is composed of refractory aggregate, refractory fine powder, oxide powder, binder and admixture;

[0023] The refractory aggregate is composed of 30 parts of super bauxite clinker particles with a particle size of 1-8 mm and 20 parts of tabular corundum particles with a particle size of 1-8 mm;

[0024] The refractory fine powder consists of 3 parts of kyanite powder with a particle size of less than 0.15mm, 5 parts of silicon carbide powder with a particle size of less than 1mm, 18 parts of super alumina powder with a particle size of less than 1mm, and 10 parts of white corundum powder with a particle size of less than 0.044mm Mixed with 3 parts of zircon powder with a particle size of less than 0.044mm;

[0025] The said oxide powder has a particle size of less than 5 μm, and consists of 3 parts of silica powder containing 97.5% of silicon oxide and 2 parts of alumina powder containing 98.7...

Embodiment 2

[0029] A refractory castable for rotary kiln mouth and kiln head cover, which is composed of refractory aggregate, refractory fine powder, oxide powder, binder and admixture;

[0030] The refractory aggregate consists of 29 parts of synthetic mullite particles with a particle size of 1-8mm and 25 parts of tabular corundum particles with a particle size of 1-8mm;

[0031] The refractory fine powder consists of 5 parts of kyanite powder with a particle size of less than 0.15mm, 5 parts of silicon carbide powder with a particle size of less than 1mm, 13 parts of special grade alumina powder with a particle size of less than 1mm, and 6 parts of white corundum powder with a particle size of less than 0.044mm Mixed with 5 parts of mullite powder with a particle size of less than 0.074mm;

[0032] The said oxide powder has a particle size of less than 5 μm, and is composed of 4 parts of silica powder containing 97.5% of silicon oxide and 3 parts of alumina powder containing 98.7% of alumina...

Embodiment 3

[0036] A refractory castable for rotary kiln mouth and kiln head cover, which is composed of refractory aggregate, refractory fine powder, oxide powder, binder and admixture;

[0037] The refractory aggregate is composed of 28 parts of super bauxite clinker particles with a particle size of 1-8mm, 20 parts of white corundum particles with a particle size of 1-8mm and 12 parts of synthetic mullite particles with a particle size of 1-8mm;

[0038] The refractory fine powder consists of 4 parts of kyanite powder with a particle size of less than 0.15mm, 10 parts of special grade alumina powder with a particle size of less than 1mm, 6 parts of synthetic mullite powder with a particle size of less than 0.074mm, and 5 parts of board with a particle size of less than 0.044mm. A mixture of corundum powder and 3 parts of zircon powder with a particle size of less than 0.044mm;

[0039] The particle size of the said oxide micropowder is less than 5μm, and consists of 6 parts of silica micropow...

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Abstract

The invention discloses a refractory castable for a kilneye and a kiln head cover of a rotary kiln, comprising 50-60 parts of refractory aggregate, 28-39 parts of refractory micro powder, 5-8 parts of oxide micro powder, 4-6 parts of bonding agent and 1.56-2.8 parts of additive, wherein the granularity of the refractory aggregate is 1-8mm, the granularity of the refractory micro powder is less than 1.0mm, the granularity of the oxide micro powder is less than 5mum, and the granularity of the bonding agent is less than 0.088mm. The refractory castable adopts the complex phase technology, has good balance in notably improving mechanical strength, wearing resistance and thermal shock resistance of the material, enables the castable to obtain excellent comprehensive performance, and effectively solves the problems that the prior refractory castable for the kilneye and the kiln head cover of the rotary kiln is easy to wear, has bad thermal shock resistance or lower strength and short service life.

Description

Technical field [0001] The invention relates to the field of refractory materials, in particular to a refractory castable for a rotary kiln mouth and kiln head cover. Background technique [0002] In the industrial fields of building materials, metallurgy, chemical industry, etc., rotary kilns are widely used for high-temperature treatment of solid materials. The operation efficiency and energy consumption account for a large proportion of production costs. Therefore, rotary kilns are used in corresponding industrial production. China is in a very important position, without exception, it is the key core equipment of the corresponding enterprise. According to the different properties of heat treatment of materials, rotary kilns can be divided into two types: drying kiln and calcining (smelting) kiln. Among them, the calcining (smelting) kiln can be divided into cement kiln, lime kiln, metallurgical chemical kiln, etc. according to different materials. Cement kilns and lime kiln...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/106C04B35/185C04B7/32
Inventor 廖桂华张玫张国强徐国辉陈军
Owner LUOYANG INST OF SCI & TECH
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