Aluminum chromium zirconia fire resistive material for producing abrasion-proof prefabricated component

A refractory, aluminum-chromium-zirconium technology, applied in the field of refractories, can solve the problem that the refractory strength, wear resistance and shock resistance cannot reach wear-resistant prefabricated parts, limit the application range of aluminum-chromium refractories, and have poor thermal shock resistance. and other problems, to achieve the effect of reducing large-area structural spalling, small thermal expansion coefficient, and good thermal insulation

Inactive Publication Date: 2008-05-07
HENAN GENGSHENG REFRACTORIES
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Problems solved by technology

However, the thermal shock resistance of aluminum-chromium refractories is poor, and it is easy to form cracks and peel off when used in environmental conditions with severe temperature changes (rapid cooling, rapid heating), resulting in a greatly shortened service life
These unfavorable factors limit the application range of aluminum-chrome refractories: they can only be used i

Method used

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  • Aluminum chromium zirconia fire resistive material for producing abrasion-proof prefabricated component
  • Aluminum chromium zirconia fire resistive material for producing abrasion-proof prefabricated component

Examples

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Example Embodiment

[0049] Example 1 An aluminum-chromium-zirconium refractory material for preparing a wear-resistant preform. The raw material formula is shown in Table 1.

[0050] The raw materials of which the composition meets the requirements are picked, crushed and sieved, and then mixed according to the stated ratio, mixed with water and stirred evenly, injected into the mold for vibration molding, and then baked and molded at high temperature.

[0051] The raw material formulas of the aluminum-chromium-zirconium refractory materials of Examples 2 to 10 are shown in Table 1, and the method for preparing wear-resistant preforms thereof is the same as that of Example 1.

[0052] The raw material formulas of the aluminum-chromium-zirconium refractories of Examples 11 to 20 are shown in Table 2, and the method for preparing wear-resistant preforms thereof is the same as that of Example 1.

[0053] Table 1 The raw material formula of Examples 1 to 6

[0054] Unit: weight percentage (%)

[0055] ...

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Abstract

The invention relates to an aluminum-chromium-zirconium refractory material for preparing wear-resistant prefabricated parts. The raw materials for its preparation include the following raw materials in weight percentages: 55-75% of fused corundum with a particle size of 0.044-8 mm, and partially stabilized zirconia with a particle size of 0.21-0.044 mm. 5-20%, 0.030-0.040mm chromium oxide 3-8%, Al2O3≥70% pure calcium aluminate cement 3-10%, ρ-alumina micropowder 1-8%. The refractory material has strong thermal shock resistance, enhanced slag resistance, enhanced wear resistance and impact resistance, which greatly reduces the large-area structural spalling of the refractory material due to temperature changes, and has a small thermal expansion coefficient and low thermal conductivity. , Extended service life.

Description

technical field [0001] The invention relates to a refractory material, in particular to an aluminum-chromium-zirconium refractory material for preparing a wear-resistant preform. Background technique [0002] Wear-resistant prefabricated parts are mostly made of aluminum-chromium refractory materials, and aluminum-chromium refractory materials are mainly made of Al 2 o 3 and Cr 2 o 3 Composed of two components, these two substances can form an infinite solid solution after high temperature sintering, have good chemical stability, wear resistance and high softening temperature under load, can resist high temperature gas erosion, and have high hardness. It is resistant to high temperature oxidation, and has a good effect in neutral and acidic slag. Because aluminum-chromium refractories have many excellent properties, they have been widely used in metallurgy and industrial furnaces. However, the thermal shock resistance of aluminum-chromium refractory materials is poor, a...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 周安宏张光普陈瑞金徐德亭胡波蒲李刚张顺庆
Owner HENAN GENGSHENG REFRACTORIES
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