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Low-aluminum sintered alumina-silica refractory material and preparation method thereof

A refractory material, aluminum-silicon technology, which is applied in the field of low-alumina sintered aluminum-silicon refractory materials and its preparation, and can solve problems such as the shortage of special-grade alumina and zircon

Active Publication Date: 2012-10-03
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is a growing shortage of special grade alumina and zircon

Method used

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  • Low-aluminum sintered alumina-silica refractory material and preparation method thereof
  • Low-aluminum sintered alumina-silica refractory material and preparation method thereof
  • Low-aluminum sintered alumina-silica refractory material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The raw materials are medium aluminum mullite with an alumina content of 56%, silicon carbide, super-grade high-bauxite micropowder with an alumina content of 85%, soft mud with an alumina content of 30%, and a 5% PVA aqueous solution as a binder. . The weight percentage formula is: 3-1mm aluminum mullite 45%, 1-0mm aluminum mullite 10%, 1-0mm SiC 13%, 3 , The apparent porosity is 20%, the compressive strength is 60MPa, the load softening temperature is 1540℃, the thermal shock stability is 20 times, and the alkali resistance is grade 1.

Embodiment 2

[0077] The raw materials are low-alumina mullite with an alumina content of 47%, silicon carbide, first-grade high-alumina bauxite micropowder with an alumina content of 80%, soft mud with an alumina content of 30%, and concentrated pulp waste liquid as a binder. The weight percentage formula is: 3-1mm low alumina mullite 35%, 1-0mm low alumina mullite 10%, 1-0mm SiC 10%, 3 , The apparent porosity is 20%, the compressive strength is 60MPa, the load softening temperature is 1450℃, the thermal shock stability is more than 30 times, and the alkali resistance is grade 1.

Embodiment 3

[0079] The raw materials are three-grade high-bauxite with 55% alumina content, silicon carbide, 800-mesh super-grade high-bauxite micropowder with 85% alumina content, soft mud with 30% alumina content, and sulfurous acid pulp waste liquid as a combination agent. The weight percentage formula is: 3-1mm tertiary bauxite 35%, 1-0mm tertiary bauxite 10%, 1-0mm SiC 10%, 3 , The apparent porosity is 19%, the compressive strength is 55MPa, the load softening temperature is 1400°C, the thermal shock stability is 15 times, and the alkali resistance is first class.

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Abstract

The invention relates to a sintered alumina-silica refractory material. The sintered alumina-silica refractory material comprises aggregate, powder and additive; the aggregate comprises one or mixture of at least two of mullite, alumina and flint clay and silicon carbide; the powder comprises mud; and the additive comprises an organic bonding agent. The invention also provides the preparation method for the refractory material. The refractory material is low in price, and high in high temperature resistance, erosion resistance, thermal shock resistance and wear resistance and low in heat-conducting property and used for the cold ends of a decomposition band and a transition band of a rotary cement kiln, can replace the conventional anti-stripping high-alumina brick and the conventional anti-stripping silicon mullite brick; and the requirements of the cement kiln on low heat conduction and alkali eclipse resistance of the refractory material can be met, the radiation loss can be reduced, and the service life of the kiln is prolonged, and the economic benefit of the kiln is improved.

Description

technical field [0001] The invention relates to a sintered aluminum-silicon refractory material and a preparation method thereof. Specifically, the invention relates to a low-alumina sintered aluminum-silicon refractory material and a preparation method thereof. Background technique [0002] my country is the world's largest cement producer. In 2011, China not only produced 2 billion tons of cement, accounting for about 60% of the world's cement production, but also the new dry process cement production technology has been widely promoted. Therefore, China's cement industry generally reflects the average level of world cement manufacturing. At present, the cold end of the transition zone of the cement rotary kiln in my country is mainly made of silica molybdenum bricks, the decomposition zone is mainly made of anti-stripping high-alumina bricks, and the kiln tail preheater is mainly made of alkali-resistant bricks. [0003] Silica bricks are made of high-quality special-gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66F27B7/20
Inventor 张金龙王杰曾汪雷李存弼周键董舜杰
Owner ANHUI RUITAI NEW MATERIALS TECH
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