Slag-corrosion-resistant magnesite-spinel brick and preparation method thereof

Abstract

The invention provides a slag-corrosion-resistant magnesite-spinel brick and a preparation method thereof and relates to a slag-corrosion-resistant magnesite-spinel brick. The slag-corrosion-resistant magnesite-spinel brick is prepared from, by mass, 61-81% of fused magnesite particles and fine powder, 0-8% of magnesium aluminate spinel particles, 3-10% of magnesium aluminate spinel fine powder, 2-8% of aluminum powder, 0.5-3% of titanium dioxide, 0.5-10% of zirconium oxide fine powder and 0.1-0.5% of yttrium oxide powder. The slag-corrosion-resistant magnesite-spinel brick is obtained through the steps of material preparation, premixing of materials, mixing of the materials and forming. Slag corrosion resistance, high-temperature oxidation resistance and compactness of the magnesite-spinel brick are improved, and accordingly the aim of prolonging the service life of the magnesite-spinel brick is achieved.

Description

【Technical field】 [0001] The invention relates to a magnesia spinel brick for a refining furnace, in particular to a slag erosion-resistant magnesia spinel brick and a preparation method thereof. 【Background technique】 [0002] It is well known that with the progress of the metallurgical industry and the continuous adjustment and optimization of the structure of steel products, my country's demand for high-quality steel products has further increased. Refining furnace steelmaking has been vigorously promoted and applied as a cost-effective out-of-furnace refining method. Correspondingly, higher requirements are put forward for refractory materials used in refining furnaces. [0003] At present, the refractory materials used in refining furnaces are mainly magnesia-chrome bricks. Since this product contains chromium oxide, under high temperature, oxidizing atmosphere or alkaline conditions, the Cr in it 3+ will convert to Cr 6+ , while Cr 6+ Soluble in water, another Cr 6...

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Problems solved by technology

[0003] At present, the refractory materials used in refining furnaces are mainly magnesia-chrome bricks. Since this product contains chromium oxide, under high temperature, oxidizing atmosphere or alkaline conditions, the Cr in it 3+ will convert to Cr 6+ , while Cr 6+ Soluble in water, another Cr 6+ It can also exist in the gaseous phase. During the production process, it will be discharged into the atmosphere with the flue gas to pollute the air, thereby causing very serious pollution to the environment such as water sources, the atmosphere, and soil. It becomes a super carcinogen and has a serious impact on human health. more serious hazard

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