Low-thermal-conductivity chrome-zirconium corundum brick for hazardous waste treatment and preparation method thereof

By using specific raw materials and processes to prepare low thermal conductivity chromium-zirconium corundum bricks, the problem of insufficient heat resistance and erosion resistance of refractory materials in hazardous waste incinerators has been solved, achieving high compressive strength and good heat insulation effect, thereby improving the service life and efficiency of the incinerator.

CN118993706BActive Publication Date: 2026-06-19ZHENGZHOU RUITAI REFRACTORY MATERIALS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHENGZHOU RUITAI REFRACTORY MATERIALS TECH CO LTD
Filing Date
2024-08-01
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing refractory materials lack sufficient heat resistance and corrosion resistance in hazardous waste incinerators, affecting the service life and efficiency of the incinerators. Furthermore, existing technologies struggle to simultaneously meet the requirements of high compressive strength and good thermal insulation.

Method used

Low thermal conductivity chromium-zirconium corundum bricks are prepared by using fused white corundum powder, zirconium oxide micro powder, chromium oxide micro powder, alumina micro powder, metakaolin, hydroxyl iron oxide modified diatomite, and modified water glass as raw materials and through specific mixing and sintering processes to form a stable three-dimensional network structure to improve the compressive strength and thermal insulation performance of the material.

Benefits of technology

It improves the compressive strength and thermal insulation effect of refractory materials, enhances their resistance to acid and alkali slag corrosion, extends the service life of incinerator linings, and improves incineration efficiency.

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Abstract

This invention belongs to the field of refractory materials technology, and particularly relates to a low thermal conductivity chromium-zirconium corundum brick for hazardous waste treatment and its preparation method. Using fused white corundum powder, zirconium oxide micro powder, chromium oxide micro powder, alumina micro powder, metakaolin, ferric hydroxide-modified diatomaceous earth, and modified water glass as raw materials, the mixture is mixed, pressed, dried, and fired to obtain a low thermal conductivity chromium-zirconium corundum brick with high compressive strength, low thermal conductivity, and good thermal shock resistance. The addition of ferric hydroxide-modified diatomaceous earth and sodium tetraborate-modified water glass allows them to form chemical bonds with other raw materials during the mixing process, creating a good interfacial bond and thus improving the mechanical properties of the product.
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