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Al-Mg-Cr Composite Spinel Brick

A spinel brick and magnesia-aluminum spinel technology, which is applied in the field of aluminum-magnesium-chromium composite spinel bricks, can solve the problems of poor thermal shock resistance, easy cracking, unsatisfactory fire resistance, etc., and achieves good density. , the effect of prolonging the service life, excellent high temperature strength and thermal shock stability

Active Publication Date: 2014-10-01
河南瑞泰耐火材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal shock resistance of aluminum-chromium refractories is poor, and cracks are easy to occur when used in rapid cooling and rapid heating environments, and their refractory performance is generally not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An aluminum-magnesium-chromium composite spinel brick, using 40% of tabular alumina with a particle size of 5-3mm, 18% of tabular alumina of 3-1mm, 15% of tabular alumina of 3 , after being mixed by a wet mill, it is formed by a 1000T friction press, dried in a kiln at 110°C for 24 hours, and then sintered at a high temperature of 1650°C to obtain an aluminum-magnesium-chromium composite spinel brick. The performance indicators are shown in Table 1.

[0023] Table 1 Product Performance Index of Example 1

[0024] 。

Embodiment 2

[0026] An aluminum-magnesium-chromium composite spinel brick, using 33% of tabular alumina with a particle size of 5-3mm, 23% of tabular alumina of 3-1mm, 10% of tabular alumina of 3 , after being mixed by a wet mill, it is shaped by a 1000T friction press, dried in a kiln at 110°C for 23 hours, and then sintered at a high temperature of 1600°C to obtain an aluminum-magnesium-chromium composite spinel brick. The performance indicators are shown in Table 2.

[0027] Table 2 Example 2 product performance index

[0028] .

Embodiment 3

[0030] An aluminum-magnesium-chromium composite spinel brick, using 31% of tabular alumina with a particle size of 5-3mm, 29% of tabular alumina of 3-1mm, 5% of tabular alumina 3 , after being mixed by a wet mill, it is formed by a 1000T friction press, dried in a kiln at 115°C for 22 hours, and then sintered at a high temperature of 1550°C to obtain an aluminum-magnesium-chromium composite spinel brick. The performance indicators are shown in table 3.

[0031] Table 3 Example 3 product performance index

[0032] .

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Abstract

The invention is the field of refractory materials, which involves a kind of aluminum -magnesium chromium composite spine -spine tiles.At the quality percentage, the present invention includes the following raw materials: a particle size of 5-3mm plate-shaped Gang Jade 30-50%, 3-1mm plate-like Gangyu 15-35%, <0.088mm plate-shaped Gangyu 5-15%, <0.088mm magnesium magnesium magnesium magnesiumAluminum spikes are 2-15%, 1-0mm high chromium ore 5-30%, <0.088mm chromium green 1-10%, and a phosphate binding agent with a total weight of 2-5%of the above raw materials.The invention aluminum -magnesium chromium composite spine -spine tile melting point, high hardness, low pores, good thermal shock, anti -slag, especially silicon iron residue erosion and permeability, can meet the colorful high -temperature copper melting furnace, povertyizationThe use requirements of strict parts in the electric furnace, anode furnace, and flash furnace have significant economic benefits.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to an aluminum-magnesium-chromium composite spinel brick. Background technique [0002] Aluminum-chromium refractories are mainly composed of Al 2 o 3 and Cr 2 o 3 Composed of these two components, these two substances can form an infinite solid solution after high-temperature sintering. It has high chemical stability and wear resistance, and has a high softening temperature under load, and can resist high-temperature airflow erosion. Because the aluminum-chromium refractory has the above-mentioned excellent properties, it has achieved good results in the metallurgical industry. However, the thermal shock resistance of aluminum-chromium refractories is poor, and cracks are easy to occur when used in rapid cooling and rapid heating environments, and their refractory performance is generally not ideal. [0003] With the rapid development of non-ferrous smelting ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K21/02C04B35/66
Inventor 刘昭翟耀杰张根亭刘晓磊尹超男张超周珍妮刘威徐琳琳郭学亮
Owner 河南瑞泰耐火材料科技有限公司
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