Glass melting is one of the most chemically corrosive environments that refractory materials face. Molten glass at 1400–1550°C is an aggressive solvent that attacks oxide-based refractories through direct dissolution, vapor-phase attack, and thermochemical reactions at the melt line. Float glass tanks, container glass furnaces, and fiberglass units all impose unique constraints on refractory selection.
Firebrics supplies fused-cast AZS (alumina-zirconia-silica) blocks for superstructure and bottom linings, dense silica bricks for the crown, and backup insulation systems. Our glass-industry refractories are used in float lines in Italy, container furnaces in Southeast Asia, and specialty glass applications worldwide.
Key Application Zones
AZS fused-cast blocks provide maximum resistance to glass melt corrosion in the melting zone and tank walls — the dominant material choice for contact surfaces.
Fused silica or high-purity dense silica bricks for the crown — low contamination risk, high refractoriness to 1700°C, and minimal glass-defect generation.
The throat connecting melter to refiner sees intense flow and temperature gradients — AZS nozzles and blocks with high ZrO₂ content ensure long-term integrity.
Checker bricks in glass furnace regenerators must handle sulfate-rich atmospheres and high thermal cycling — magnesia and high alumina checkers are the principal choices.
Recommended Products
Custom OEM Shapes
Fused-cast AZS blocks (33%, 36%, 41% ZrO₂) in any custom dimension — tank walls, bottom courses, sidewall blocks, and throat pieces manufactured to your drawings.
View ProductInsulation Bricks
High-alumina lightweight insulating bricks for backup layers behind superstructure and regenerator walls — reduce shell temperature and improve energy efficiency.
View ProductRefractory Nozzles
High-ZrO₂ AZS and dense alumina nozzles for glass flow control, forehearth distributors, and orifice rings — precision-machined to ±0.1mm tolerance.
View ProductGlass Furnace Refractory Design
Provide your furnace type, capacity (tonnes/day), and glass composition. Our technical team will specify the exact refractory grades for each zone and estimate campaign duration.