A comprehensive analysis of the quality parameters of fused cast aluminum-zirconium-silicate (AZS) refractories for glass furnaces has been carried out. It was shown that the assessment of the quality of AZS refractories based on the content of ZrO2 and density does not fairly reflect their performance characteristics. Of fundamental importance are the chemical composition and behavior of the glassy phase, which determine the volume and exudation onset temperature. The most important conditions for obtaining high-quality AZS refractories, characterized by a glassy phase melt-out volume of 2 – 3% and melt-out onset temperature above 1,400°C, include the use of an oxidative melting technology and the content of impurities in the chemical composition of the refractory of no more than 0.25 – 0.30%. The service conditions of AZS refractories in the melting tank and the working space of glass-melting furnaces have been formulated. Their effect on the exudation process behavior, corrosion resistance of the refractories, and formation of glass defects was shown.
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Translated from Novye Ogneupory, No. 4, pp. 3 – 9, April, 2021.
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Dzyuzer, V.Y. Analysis of Quality Parameters of Fused Cast AZS Refractories for Glass-Making Furnaces. Refract Ind Ceram 62, 123–129 (2021). https://doi.org/10.1007/s11148-021-00570-z
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DOI: https://doi.org/10.1007/s11148-021-00570-z