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Bubble alumina bricks are characterized by good chemical properties, good insulating property, good thermal shock resistance etc., are mainly used as working linings or insulating linings for high temperature kilns in ceramic, electric porcelain, abrasive and refractories industries, the inner lining of silicon stell heating furnaces in metallurgical industry, the insulating lining of hydrogen generation furnace, gasifier in petrochemical industry, and insulating lining of hard alloy intermediate frequency induction furnace.