Aluminum magnesium chromium composited spinel brick

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

Active Publication Date: 2013-04-10
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 belongs to the field of fire resistant materials, and particularly relates to an aluminum magnesium chromium composited spinel brick. The brick comprises the following raw materials in percentage by weight: 30 to 50 percent of tabular corundum with a granularity of 5 mm to 3 mm, 15 to 35 percent of tabular corundum with a granularity of 3 mm to 1 mm, 5 to 15 percent of tabular corundum with a granularity less than 0.088 mm, 2 to 15 percent of aluminum magnesium spinel with a granularity less than 0.088 mm, 5 to 30 percent of high chromium ore with a granularity of 1 mm to 0 mm, 1 to 10 percent of chrome green with a granularity less than 0.088 mm, and phosphate binder of which the weight is 2 to 5 percent of the total weight of the above materials. According to the invention, the aluminum magnesium chromium composited spinel brick has a high melting point, high hardness, low porosity, good thermal shock resistance and excellent slag resistance especially for ferrosilicon slag erosion and seepage, can meet the usage requirements of harsh working condition parts in a high temperature colored copper melting furnace, an electric furnace for cleaning slag, an anode furnace and a flash furnace, and has remarkable economical benefit.

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 Applications(China)
IPC IPC(8): C04B35/66
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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