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Application of spherical alumina micro-powder in refractory castable

A technology of spherical alumina and refractory castables, which is applied in the field of alumina micropowder, can solve the problems of poor compactness, poor high-temperature performance, and poor fluidity of refractory castables, and achieve high density, extended service life, and line Effect of change reduction

Inactive Publication Date: 2020-01-03
天津泽希矿产加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings in the prior art, such as: the existing refractory castables containing silica powder have poor high-temperature service performance and short service life, and the refractory castables containing alumina powder have poor compactness and flow bad sex

Method used

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  • Application of spherical alumina micro-powder in refractory castable

Examples

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Embodiment 1

[0014] Example 1: Application of spherical alumina micropowder in refractory castable, said refractory castable includes the following components and parts by weight: 64-70 parts of refractory aggregate, 18 parts of cement, 7 parts of alumina micropowder, spherical 0 part of alumina micropowder, 6 parts of cement, 2 parts of kyanite, 0.03 part of citric acid, 0.05 part of 3p and 0.25 part of explosion-proof fiber, the spherical alumina micropowder contains alumina, silicon dioxide, iron oxide and sodium oxide As the main component, kaolin raw meal with alumina content ≥ 99.5%, silica content ≤ 1200ppm, iron oxide content ≤ 800ppm, and sodium oxide content ≤ 3500ppm;

Embodiment 2

[0015] Example 2: Application of spherical alumina micropowder in refractory castable, said refractory castable includes the following components and parts by weight: 64-70 parts of refractory aggregate, 18 parts of cement, 6 parts of alumina micropowder, spherical 1 part of alumina micropowder, 6 parts of cement, 2 parts of kyanite, 0.03 part of citric acid, 0.05 part of 3p and 0.25 part of explosion-proof fiber, the spherical alumina micropowder contains alumina, silicon dioxide, iron oxide and sodium oxide As the main component, kaolin raw meal with alumina content ≥ 99.5%, silica content ≤ 1200ppm, iron oxide content ≤ 800ppm, and sodium oxide content ≤ 3500ppm;

Embodiment 3

[0016] Example 3: Application of spherical alumina micropowder in refractory castable, said refractory castable includes the following components and parts by weight: 64-70 parts of refractory aggregate, 18 parts of cement, 5 parts of alumina micropowder, spherical 2 parts of alumina micropowder, 6 parts of cement, 2 parts of kyanite, 0.03 part of citric acid, 0.05 part of 3p and 0.25 part of explosion-proof fiber, the spherical alumina micropowder contains alumina, silicon dioxide, iron oxide and sodium oxide As the main component, kaolin raw meal with alumina content ≥ 99.5%, silica content ≤ 1200ppm, iron oxide content ≤ 800ppm, and sodium oxide content ≤ 3500ppm;

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Abstract

The invention discloses application of spherical alumina micro-powder in a refractory castable, belonging to the technical field of refractory castables. The refractory castable is prepared from the following components in parts by weight: 64-70 parts of refractory aggregate, 18 parts of a cementing material, 0-7 parts of aluminum oxide micro-powder, 0-7 parts of spherical alumina micro-powder, 6parts of cement, 2 parts of kyanite, 0.03 part of citric acid, 0.05 part of 3p and 0.25 part of explosion-proof fibers, wherein the spherical alumina micro-powder contains aluminum oxide, silicon dioxide, ferric oxide and sodium oxide as main components; the content of the aluminum oxide is more than or equal to 99.5%; the content of the silicon dioxide is less than or equal to 1200 ppm; the content of the ferric oxide is less than or equal to 800 ppm; and the content of the sodium oxide is less than or equal to 3500 ppm. The problems that a conventional refractory castable is poor in high-temperature use performance, short in service life, poor in compactness and bad in flowability are solved in the invention.

Description

technical field [0001] The invention relates to the technical field of alumina micropowder, in particular to the application of spherical alumina micropowder in refractory castables. Background technique [0002] The use of micropowder promotes the development of refractory materials, especially the use of alumina micropowder and silica micropowder in castables, which reduces the water content of the casting molded body and increases the density. The particles of silica micropowder are spherical and spherical. The particles have a small specific surface area, a large bulk density, and the spherical particles have good isotropy, uniform stress and strain, and the friction coefficient of the spherical particles is small. When added to the refractory matrix, the fluidity and filling performance are good, and water can be released effectively. , however, the melting point of silica powder is low, it is easy to introduce impurities and other components in the matrix to react at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3427C04B2235/5208C04B2235/3418C04B2235/3272C04B2235/3201C04B2235/349C04B2235/77C04B2235/96
Inventor 谭莹刘卫东朱树峰高念
Owner 天津泽希矿产加工有限公司
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