Fused and cast high-alumina bricks are also called fused zirconia bricks. The zirconia content is 93-96%. The mineral phase is mainly plagioclase zircon. Zirconia is the most resistant oxide to the erosion of molten glass. Fused and cast zirconia bricks are used in various glass furnaces, especially in kilns producing high-grade glass, and the use effect is more obvious. For example, silicate borate glass kilns, aluminosilicate glass kilns, and nonferrous metal smelting electrolytic cells
The fused high zirconium brick has a very dense structure, low apparent porosity, high strength, excellent wear resistance, scouring resistance, and corrosion resistance to liquid glass. It hardly produces stones and streaks in the process of use, and has no pollution to liquid glass. It is often used in key parts of glass kilns
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