FIELD: metallurgy.
SUBSTANCE: invention relates to a fused cast refractory material based on aluminum oxide, zirconium dioxide and silica (AZS) and can be used in melting tank in contact with molten glass, and top of tank and on vault. Fused cast refractory material comprises 60-70 wt% Al2O3 13-19 wt% ZrO2, 15.5-18 wt% SiO2 and 2.0-2.6 wt% Na2O. Composition of glass phase includes SiO2, as well as Al2O3 and Na2O, wherein molar ratio of Al2O3 and Na2O is in range 0.8 to 1.6.
EFFECT: technical result of invention is improvement of stability of refractory material to infiltration.
7 cl, 2 dwg, 2 tbl
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