In the design and maintenance of glass melting furnaces, the selection of refractory materials is directly related to production efficiency and equipment lifespan. This article delves into the material characteristics of fused AZS (Al₂O₃–ZrO₂–SiO₂) blocks and their application logic in different temperature zones. It offers mechanical engineers and factory operators a systematic and practical technical guide on scientifically configuring AZS cast blocks, including reasonable layout strategies from high - temperature to low - temperature areas, key measures to prevent crystallization and thermal cracking, as well as installation techniques and daily maintenance points. Whether you are building a new furnace or optimizing an existing structure, this guide can answer your questions and enhance the operational stability and economic benefits of the furnace.