Why is material selection for the glass furnace crown so crucial?

The furnace crown is constantly exposed to a high-temperature environment of 1600℃, continuous load, and alkali vapor corrosion. Material selection directly determines the furnace lifespan:
◈ High-purity silica bricks are the primary choice: Their composition is similar to glass, preventing contamination of the molten glass. They have strong high-temperature stability and can withstand the weight and thermal stress of the crown for extended periods, making them the standard for most float glass furnace crowns;
◈ Fused casting AZS bricks compensate for shortcomings: For areas directly exposed to flames, such as the burner ports, their corrosion resistance far surpasses that of silica bricks, preventing rapid local damage;
◈ High-alumina bricks provide a connection: The crown feet experience complex stresses. The high strength and temperature resistance of high-alumina bricks perfectly connect the crown and the breast wall, preventing structural loosening.
The combination of these three materials is the optimal refractory solution for glass furnace crowns!