FIELD: chemistry.
SUBSTANCE: claimed invention relates to melted fire-proof products based on aluminium oxide - silicon oxide - zirconium oxide and can be used in glass-melting furnaces in contact with melted glass. A melted fireproof product has the following average chemical composition in wt % counted per oxides: ZrO2 30-46, SiO2 10-16, Al2O3 - addition to 100%, with Y2O3≥50/ZrO2 and Y2O3≤5%, Na2O+K2O 0.5-4%, CaO ≤0.5%; and other substances - ≤1.5%. The product is used in the form of fireproof blocks with weight more than 10 kg. The block shape is not limited.
EFFECT: obtaining the defect-free product, possessing resistance to corrosion and formation of bubbles in the process of service.
9 cl, 1 tbl
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