Five Glass Furnace Types Covered on This Page
End-Fired Glass Furnace
Commonly used for container glass, daily-use glass and medium or small glass production lines. Key areas include the charging end, melting tank, ports and regenerators.
Side-Fired Glass Furnace
Commonly used for float glass and large glass tank furnaces. Key refractory areas include the crown, breast wall, sidewall, bottom and regenerators.
Oxy-Fuel Glass Furnace
High combustion temperature and strong alkali vapor corrosion make the crown, breast wall, glass contact line and throat especially important.
Electric Glass Furnace
Often used for specialty glass, borosilicate glass and glass fiber. Electrode blocks, sidewalls, bottom blocks and flow channels require stable refractories.
Pot Furnace / Day Tank
Suitable for art glass, small-batch glass and specialty glass production. This section can support long-tail product keywords.
Glass Furnace Diagrams with Refractory Area Markings
Refractories for End-Fired Glass Furnaces
In an end-fired furnace, flame enters from one end and returns in a U-shaped path. The port area, melting tank sidewalls, bottom and regenerators are key refractory zones.
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- Melting tank sidewall: Fused Cast AZS Brick
- Crown: Glass Furnace Silica Brick
- Port: Port Brick, Mullite Brick
- Regenerator: Checker Brick
Refractories for Side-Fired Glass Furnaces
Side-fired furnaces are widely used in large tank furnaces. They require strong refractory design for crowns, breast walls, sidewalls and regenerators.
- Glass contact line: AZS 36# Brick, AZS 41# brick
- Crown: Glass Furnace Silica Brick, Zero-expansion Silica Brick
- Breast wall: Silica Brick, AZS brick, zircon mullite brick
- Regenerator: high alumina checker brick, magnesia-alumina checker brick
Refractories for Oxy-Fuel Glass Furnaces
Oxy-fuel furnaces have high combustion efficiency, but temperature and alkali vapor corrosion are concentrated. Crown, breast wall, glass contact line and throat materials need higher stability.
- Glass contact line: AZS 41# Fused Cast Brick
- Breast wall: zircon mullite brick, AZS brick
- Crown: high-quality glass furnace silica brick
- Throat: zircon brick, dense zircon brick
Electrode Area: AZS Brick
Sidewall: Zircon Brick
Bottom: Tank Bottom Brick
Flow Channel: Forehearth Brick
Refractories for Electric Glass Furnaces
Electric furnaces are often used for specialty glass. Refractory selection must control glass contamination and support stable operation near electrode openings.
- Electrode area: AZS brick, Alumina Brick
- Sidewall: Zircon Brick, Fused cast AZS brick
- Bottom: Zircon Brick, Tank Bottom Block
- Forehearth: Zircon Mullite Brick, Alumina Brick
Refractories for Pot Furnaces and Day Tanks
Small glass furnaces are suitable for long-tail search terms around art glass, small-batch glass and specialty glass refractory materials.
- Chamber: High Alumina Brick, Mullite Brick
- Pot: Zircon Material, Alumina Material
- Roof: Mmullite Brick, Lightweight Insulating Brick
- Insulation layer: Insulating Brick, Ceramic Fiber Material
Glass Furnace Area and Refractory Material Table
| Furnace Area | Working Conditions | Recommended Materials | Product Link |
|---|---|---|---|
| Melting Tank Sidewall | Glass liquid corrosion, glass contact line erosion and high-temperature operation | Fused cast AZS 33#, AZS 36#, AZS 41# | Fused Cast AZS Brick |
| Tank Bottom | Static pressure from glass liquid and long-term corrosion | AZS brick, zircon brick, Clay Bottom Bblock, Insulating bBrick | Zircon Brick |
| Crown / Roof | High-temperature flame, alkali vapor corrosion and structural load | Glass Furnace Silica Brick, Zero-expansion Silica Brick | Glass Furnace Silica Brick |
| Breast Wall | Flame radiation, dust and alkali vapor corrosion | Silica Brick, AZS brick, Zircon Mullite Brick | Zircon Mullite Brick |
| Port | Temperature fluctuation, flame erosion and frequent thermal shock | Silica brick, mullite brick, AZS brick | Port Brick |
| Throat | High glass flow speed, strong erosion and concentrated corrosion | AZS 41#, Zircon Brick, Dense Zircon Brick | Dense Zircon Brick |
| Working End | Glass homogenization and stable temperature requirements | AZS brick, Alumina Brick, Zircon Mullite Brick | AZS brick |
| Forehearth | Glass delivery, stone reduction and contamination control | Zircon Mullite Brick, Mullite Brick, Alumina Brick | Mullite Brick |
| Regenerator Checkerwork | Heat storage, heat exchange, dust blockage and flue gas corrosion | Checker brick, high alumina brick, magnesia-alumina brick, magnesia brick | Checker Brick |
| Insulation Layer | Heat loss reduction and external structure protection | Lightweight insulating brick, ceramic fiber, insulating castable | Insulating Brick |
Common Refractory Products for Glass Furnaces
Glass Furnace Refractory FAQs
What refractory material is commonly used for glass furnace sidewalls?
Glass furnace melting tank sidewalls commonly use fused cast AZS brick because this area is exposed to high-temperature glass liquid and requires strong resistance to corrosion and erosion.
Why is silica brick commonly used for glass furnace crowns?
Glass furnace crowns operate at high temperature and carry structural load. High-quality silica brick provides good refractoriness under load and high-temperature volume stability.
Where are AZS 33#, AZS 36# and AZS 41# used?
AZS 33# is often used in general glass contact areas, AZS 36# is suitable for stronger corrosion zones such as sidewalls and glass contact lines, and AZS 41# is commonly used in critical areas such as throats and flow channels.
How should regenerator checker bricks be selected?
Regenerator checker bricks should be selected according to flue gas temperature, dust composition, blockage risk and heat exchange efficiency. Common options include high alumina, magnesia-alumina, magnesia and mullite checker bricks.
What is the difference between end-fired and side-fired furnace refractory design?
End-fired furnaces focus more on the end port area, regenerators and flame return zone. Side-fired furnaces are usually larger and require stronger overall refractory design for the crown, breast wall, sidewall and regenerators.
