Glass Furnace Refractories
Fused-Cast AZS, Silica Bricks & Glass-Melting Furnace Shapes
Refractory solutions for float glass, container glass, tableware glass and specialty glass melting furnaces, covering glass-contact, superstructure, crown, regenerator and thermal-insulation zones.
PRODUCT RANGE
• Fused-cast AZS 33, AZS 36 and AZS 41 blocks
• Silica bricks for glass furnace crowns and superstructures
• Fused silica and zircon-containing shapes
• Fireclay and mullite bricks for bottom and regenerator zones
• Ramming mixes, sealing materials and custom machined shapes
GRADE SELECTION
AZS-33: general glass-contact sidewalls, paving and transition zones.
AZS-36: higher-wear melting tank walls, doghouse corners, weirs and port sills.
AZS-41: severe-corrosion areas such as throats, electrode blocks, bubbler blocks and dam walls.
TYPICAL TECHNICAL DATA — FUSED-CAST AZS
Property | AZS-33 | AZS-36 | AZS-41
Al₂O₃ (%) | ≥50.0 | ≥49.0 | ≥45.0
ZrO₂ (%) | ≥32.5 | ≥35.5 | ≥40.5
SiO₂ (%) | ≤15.5 | ≤13.5 | ≤13.0
Na₂O + K₂O (%) | ≤1.20 | ≤1.50 | ≤1.40
Bulk density (g/cm³) | ≥3.75 | ≥3.85 | ≥4.00
Apparent porosity (%) | ≤1.2 | ≤1.1 | ≤1.0
Cold crushing strength (MPa) | ≥300 | ≥300 | ≥300
Refractoriness under load (°C) | ≥1700 | ≥1700 | ≥1700
TYPICAL TECHNICAL DATA — GLASS FURNACE SILICA BRICK
SiO₂: ≥94–96%
Refractoriness: ≥1690°C
RUL, 0.2 MPa: ≥1620°C
Apparent porosity: ≤21–22%
Cold crushing strength: ≥30–40 MPa
Final selection depends on glass chemistry, furnace zone, contact with molten glass, operating temperature, casting method, dimensional tolerances and furnace design. Values shown are typical reference values and must be confirmed for each project.
Send the furnace drawing, glass composition, target campaign, zone and block dimensions for technical review and quotation.
