Zircon Mullite Tubes and Glass Delivery Blocks
Zircon mullite production of the tubes and delivery blocks that steer the glass flow.
Service temperature
1500–1650 °C
Related sectors
About this product
The feeder tube is the moving part that controls how much glass reaches the spout; because it rotates continuously it suffers both corrosion and friction. Delivery blocks steer the glass as it leaves the channel. Both parts are machined in zircon mullite fully symmetric and balanced — an unbalanced tube makes gob weight oscillate.
Material
Zircon mullite is a mullite matrix reinforced with zircon (ZrSiO₄). In contact with molten glass it shows low wettability and sound corrosion resistance while keeping the melt clean. It is the standard choice for forehearth channel blocks, spouts, feeder expendables, vitrified supports and gob delivery blocks.
Applications
- Feeder tube and shaft
- Glass delivery and guide blocks
- Fibre and glass wool drawing lines
Technical data
- ZrO₂ content
- 18% – 32%
- Service temperature
- 1500 – 1650 °C
- Density
- 2.8 – 3.3 g/cm³
Values are typical ranges for the material family; a batch-specific analysis certificate can be requested.
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