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Magnesium-aluminum-zirconium composite spinel refractory material

A magnesium-aluminum spinel and refractory material technology, applied in the field of refractory materials, can solve the problems of high toxicity, high foreign exchange consumption, environmental pollution, etc., and achieve good economic and social benefits, good performance and service life, The effect of avoiding pollution

Active Publication Date: 2011-06-15
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

[0003] However, the extensive use of magnesia-chrome bricks has brought many problems: on the one hand, due to the high temperature, alkaline and oxidizing atmosphere of the used magnesia-chrome refractories, the original Cr in the material 3+ Converted to Cr contained in residual bricks after use 6+ , while Cr 6+ It is highly toxic and causes serious pollution to the environment; on the other hand, my country's chrome ore resources are poor, and the consumption of a large number of magnesia-chrome bricks requires importing a large amount of chrome ore and consuming a large amount of foreign exchange, which also exacerbates the contradiction of my country's lack of chrome ore

Method used

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  • Magnesium-aluminum-zirconium composite spinel refractory material
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  • Magnesium-aluminum-zirconium composite spinel refractory material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1 A magnesium-aluminum-zirconium composite spinel refractory material, using 34wt% of high-purity magnesia with a particle size of 5-3mm, 25wt% of high-purity magnesia with a particle size of 3-1mm (MgO content ≥ 96wt%), and 33wt% of high-purity magnesia with a particle size of 3 ), after being mixed by a wet mill, formed by a press, dried in a drying kiln at 110°C for 18 hours, and subjected to high temperature heat treatment at 1680°C, the performance indicators of the magnesium-aluminum-zirconium composite spinel products are shown in Table 2.

[0020] Table 2 Performance Index

[0021]

Embodiment 2

[0022] Example 2 A magnesium-aluminum-zirconium composite spinel refractory material, using 32 wt% of high-purity magnesia with a particle size of 5-3mm, 20 wt% of high-purity magnesia with a particle size of 3-0mm, 31 wt% of high-purity magnesia with a particle size of <0.088mm, and magnesia with a particle size of 4-1mm Aluminum spinel 12wt%, particle size 1-0mm zircon sand 5wt%, plus sulfurous acid pulp waste liquid accounting for 3wt% of the total weight of the above raw materials. After drying for 18 hours at ℃, the magnesium-aluminum-zirconium composite spinel product produced by high temperature heat treatment at 1650 ℃, its performance indicators are shown in Table 3.

[0023]

[0024] Table 3 Performance Index

[0025]

Embodiment 3

[0026] Example 3 A magnesium-aluminum-zirconium composite spinel refractory material, using 32wt% of high-purity magnesia with a particle size of 5-3mm, 20wt% of high-purity magnesia with a particle size of 3-0mm, 30wt% of high-purity magnesia with a particle size of <0.088mm, and magnesia with a particle size of 4-1mm 8wt% spar, 10wt% zircon sand with a particle size of <0.088mm, plus 5wt% sulfurous acid pulp waste liquid accounting for the total weight of the above raw materials. After drying for 28 hours, the performance index of the magnesium-aluminum-zirconium composite spinel product produced by high-temperature heat treatment at 1680°C is shown in Table 4.

[0027] Table 4 Performance Index

[0028]

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Abstract

The invention relates to a magnesium-aluminum-zirconium composite spinel refractory material. The refractory material is prepared from the following raw materials in percentage by weight: 50 to 95 percent of high-purity magnesia of which the granularity is less than or equal to 5 millimeters, 5 to 25 percent of magnesia-aluminum spine of which the granularity is less than or equal to 4 millimeters, 1 to 25 percent of desilicated zirconium or zircon sand of which the granularity is less than or equal to 3 millimeters and 1 to 6 percent of bonding agent in the raw materials. The refractory material is suitable for high temperature zones of large and medium-sized cement kilns, has high service performance and long service life, can completely replace magnesium-chromium refractory material tobe applied to the high temperature zone of a cement kiln, avoids environmental pollution caused by a magnesium-chromium brick after being used, and has very good economic benefit and social benefit.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a magnesium-aluminum-zirconium composite spinel refractory material. Background technique [0002] Magnesia-chrome bricks have good load softening temperature, high-temperature strength, corrosion resistance, thermal shock stability, etc., and are widely used in high-temperature kilns such as cement kilns, non-ferrous industrial zinc smelting, and copper smelting. [0003] However, the extensive use of magnesia-chrome bricks has brought many problems: on the one hand, due to the high temperature, alkaline and oxidizing atmosphere of the used magnesia-chrome refractories, the original Cr in the material 3+ Converted to Cr contained in residual bricks after use 6+ , while Cr 6+ It is highly toxic and causes serious pollution to the environment; on the other hand, my country's chrome ore resources are poor, and the consumption of a large number of magnesia-chrome bricks require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 刘锡俊袁林陈松林王俊涛叶亚红胡世平赵洪亮翟耀杰陈卫敏刘昭陈磊吴兴胜刘威王庆朝
Owner 河南瑞泰耐火材料科技有限公司
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