Tundish Refractories
Submerged Entry Nozzle
Nozzle that carries the steel from tundish into the mould below the meniscus, so the stream never touches air. Its bore shape sets the flow pattern and heat distribution inside the mould, which in turn governs shell growth and surface quality; the slag line usually carries a zirconia insert because that band erodes fastest.
Key Properties
| Role | Stream protection + flow pattern control |
|---|---|
| Effect | Fewer defects and a steadier process |
| Critical zone | Slag line (usually a zirconia insert) |
