Corundum spinel castable with low thermal conductivity and high corrosion resistance and preparation method thereof

By using raw materials such as microporous corundum, lightly burned spinel and recycling zirconium corundum bricks, combined with hydrated alumina and aluminum dihydrogen phosphate as a binding agent, a low-thermal conductivity and high-corrosion corrosion-resistant corundum spinel castable was prepared, solving the problem of reaction damage of existing materials at high temperatures, and achieving improved mechanical strength, enhanced corrosion resistance and extended service life of the material.

CN119638388APending Publication Date: 2025-03-18HUNAN XIANGGANG RUITAI TECH
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Patent Information

Application Number
CN202411926481.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The reaction of existing corundum-spinel castables with molten steel and slag at high temperatures leads to material damage, and the material's thermal shock resistance and service life are insufficient.

Method used

Microporous corundum, lightly burned spinel and recycled zirconium corundum bricks are used as the main raw materials, combined with hydrated alumina and aluminum dihydrogen phosphate as the binding agent to prepare low-thermal conductivity and high corrosion-resistant corundum spinel castable.

Benefits of technology

It has achieved the mechanical strength improvement, enhanced corrosion resistance and extended service life of low thermal conductivity and high corrosion resistance of corundum spinel castable, and its performance is better than similar products in the market.

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Abstract

The invention relates to a corundum spinel castable with low thermal conductivity and high corrosion resistance and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: firstly, taking 35.0 to 47.0 weight percent of recycled aluminum oxide ceramic, 25.0 to 34.0 weight percent of light-burned spinel aggregate, 13.0 to 19.0 weight percent of recycled zirconia corundum bricks, 6.0 to 9.0 weight percent of alpha aluminum oxide, 2.0 to 5.0 weight percent of fused magnesia and 1.5 to 4.5 weight percent of hydratable aluminum oxide as raw materials, adding 3.5 to 4.5 weight percent of binding agent and 0.05 to 0.08 weight percent of fiber, and uniformly mixing, so as to obtain the corundum spinel castable with low thermal conductivity and high corrosion resistance. The method has the characteristics of energy conservation, high efficiency, environment friendliness and low cost; the prepared corundum spinel castable with low thermal conductivity and high corrosion resistance is excellent in thermal shock resistance, high in mechanical strength and relatively high in use temperature.
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