Complete Guide to Refractory Bricks for Glass Furnaces

Glass furnaces work in harsh environments with extreme high temperatures, alkaline corrosion and frequent thermal shock. High-quality refractory bricks are essential to stabilize furnace operation, guarantee glass quality and extend equipment service life. Reasonable selection of glass furnace refractory bricks by zones helps glass manufacturers reduce maintenance costs and achieve continuous, efficient production.

Fused Cast AZS bricks are the core refractory materials for glass furnace melting zones. Made of alumina, zirconia and silica, they feature strong resistance to molten glass erosion and excellent structural stability at 1500°C to 1600°C. Able to withstand long-term high-temperature glass liquid scouring and alkaline flue corrosion, AZS bricks are widely used for melting pool walls, furnace bottoms and throat sections. They effectively reduce glass bubbles and streaks, ensuring stable production of high-quality glass products.

Silica bricks are the optimal choice for furnace crowns and superstructures. With over 94% silica content, they offer low thermal expansion, reliable high-temperature stability and great alkali corrosion resistance. Maintaining stable mechanical strength above 1600°C, these bricks avoid deformation and cracking during long-term operation. They are also commonly applied in regenerator arches, flues and doghouse areas to improve overall furnace durability.

Fused silica bricks serve key special positions in modern glass furnaces. With 99.5% high-purity silica, they deliver outstanding thermal shock resistance and low thermal conductivity. Mainly used for electrode holes and temperature measuring holes, their excellent insulation prevents current leakage and ensures precise temperature monitoring, meeting strict operational standards for electric glass furnaces.

High-alumina bricks and mullite bricks are cost-effective auxiliary refractories. Featuring stable refractoriness and mechanical strength, they suit medium and low-temperature zones, including forehearths, working ends, regenerator walls and checker bricks. They resist thermal shock and flue gas corrosion well, balancing reliable performance and competitive cost.