Bauxite-based low-creep mullite product

A mullite and low-creep technology, which is applied in the field of high-quality alumina-based low-creep mullite products, can solve the problems of difficulty in popularization and large-scale application, dependence on artificial synthetic materials, high production costs, etc., and achieve excellent high temperature Volume stability, improving the value of comprehensive utilization of resources, and improving the effect of grades

Active Publication Date: 2010-12-08
山西高科耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods mostly rely on artificial synthetic materials, high production cost, expensive, and their application is limited, making it difficult to promote and apply on a large scale.

Method used

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  • Bauxite-based low-creep mullite product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of alumina-based low-creep mullite products: first prepare materials according to Table 1:

[0021]

[0022] After the raw materials are selected, crushed and processed to a qualified particle size, the ingredients are proportioned according to the ratio listed in the above table. Put the base material in the ball mill for co-grinding for 20 minutes to achieve the purpose of homogenization, then pour the aggregate, base material and binder into the wet mill and mix thoroughly (the binder is added at the end), according to the designed specifications It is molded on a brick press, dried and placed in a downdraft kiln for sintering at 1650 °C under normal pressure to make alumina-based low-creep mullite products.

Embodiment 2

[0024] Preparation of alumina-based low-creep mullite products: first prepare materials according to Table 1:

[0025]

[0026] After the raw materials are selected, crushed and processed to a qualified particle size, the ingredients are proportioned according to the ratio listed in the above table. Put the base material in the ball mill for co-grinding for 20 minutes to achieve the purpose of homogenization, then pour the aggregate, base material and binder into the wet mill and mix thoroughly (the binder is added at the end), according to the designed specifications It is molded on a brick press, dried and placed in a tunnel kiln for sintering at 1650°C under normal pressure. After cooling, it can be made into alumina-based low-creep mullite products.

Embodiment 3

[0028] Preparation of alumina-based low-creep mullite products: first prepare materials according to Table 1:

[0029]

[0030] After the raw materials are selected, crushed and processed to a qualified particle size, the ingredients are proportioned according to the ratio listed in the above table. Put the base material in the ball mill for co-grinding for 20 minutes to achieve the purpose of homogenization, then pour the aggregate, base material and binder into the wet mill and mix thoroughly (the binder is added at the end), according to the designed specifications It is molded on a brick press, dried and placed in a downdraft kiln for sintering at 1650 °C under normal pressure to make alumina-based low-creep mullite products.

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Abstract

The invention provides a bauxite-based low-creep mullite product, which belongs to the field of fire-resistant materials. The bauxite-based low-creep mullite product is prepared by the following steps of: adding quartz sand, a sillimanite mineral, corundum, industrial aluminum oxide, kaolin and the like into high-alumina bauxite serving as a base material; proportioning, homogenizing, mixing, shaping and drying the mixture; and sintering the mixture at the temperature of 1,650 DEG C under the normal pressure to obtain the low-cost and high-grade bauxite-based low-creep mullite fire-resistant product. In the preparation, a composite technology route is adopted, the mineral composition is optimized and the mullitization during the production and use is effectively controlled, so the high-grade fire-resistant material product can be obtained, the superior high temperature performance of the mullite is brought into full play and the creep is small and the expansion is slight in the use of the product; and the preparation of the product can fully utilize the available resources of China, improve the comprehensive utilization value of the resources and optimize the product structure. The product can be widely applied to the parts, such as heat storage chambers, small furnaces, feeding ports, material passage systems and the like, of glass melting furnaces and other high temperature industrial furnaces.

Description

technical field [0001] The invention relates to a high-quality alumina-based low-creep mullite product, which belongs to the field of refractory materials. Background technique [0002] Among aluminum silicate refractory materials, mullite has special high temperature properties due to its special crystal structure. In addition, it also has excellent properties such as low thermal expansion coefficient, good thermal shock resistance, high temperature volume stability, glass erosion resistance, and low tendency to contaminate glass. Therefore, mullite, as an important high-grade high-efficiency refractory material, has attracted people's great attention. The production of mullite refractory materials with high-purity fused or sintered mullite raw materials has developed rapidly at home and abroad. However, in the synthesis of mullite, most of them use high-purity raw materials, which is expensive and expensive, which sets up obstacles for the wide application of mullite prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/622
Inventor 高峰王虹韩梅李祥俭刘峰
Owner 山西高科耐火材料股份有限公司
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