Press Type CNM Exchange Nozzle
CNM quick change nozzle can be divided into two products, one for CNM quick change nozzle, the other for CNM quick change nozzle . Quick change the nozzle outlet and quick change the nozzle outlet matching use.
Products Description
The press‑type CNM exchange nozzle is a critical refractory component for tundish flow control in steel continuous‑casting lines. Unlike cast‑in CNM nozzles, its zirconia liner is mechanically pressed into the metal outer shell, with no castable pouring process required. Matched with a fixed upper nozzle, it enables hot online nozzle replacement during casting operations.
By swapping the worn nozzle without stopping production, longer sequence casting runs can be achieved. This cuts downtime losses and stabilizes continuous‑casting output. The built‑in zirconia bore delivers strong resistance to molten steel erosion and greatly reduces alumina blockage issues.
Main Structure
Zirconia Insert: High‑density sintered zirconia‑corundum liner serving as the molten‑steel flow channel. Features long service life and excellent slag‑erosion resistance.
Steel Outer Shell: Heavy‑duty iron casing press‑fitted tightly with the zirconia insert. Firm bonding eliminates steel leakage risks between liner and shell.
Sealing Surface: Precision‑ground flat contact face. Forms a tight seal against the upper nozzle block to prevent liquid‑steel seepage and air suction.
Key Features
- Zirconia liner press‑assembled into metal housing for stable bonding and shorter lead time
- Hot‑swap compatible for extended uninterrupted casting campaigns
- High‑performance zirconia inner bore resists molten‑steel corrosion and nozzle clogging
- Tight inner‑diameter tolerance ensures steady steel flow and improves slab quality
- Accurately machined sealing face prevents secondary oxidation of molten steel
- Fully customisable bore sizes and outer dimensions to fit existing CNM quick‑change mechanisms
Technical Parameters
| Item | Specification |
|---|---|
| Working Material | Zirconia‑corundum insert + iron shell |
| Max Operating Temperature | ≥1700℃ |
| Assembly Method | Press‑fit |
| Compatible System | CNM tundish quick‑change nozzle system |
| Inner Diameter | Custom‑made per drawing |
| Outer Shape | Round or square optional |
Working Principle
Mounted directly below the tundish fixed upper nozzle. After prolonged casting, once the bore suffers erosion or blockage, the spent press‑type CNM exchange nozzle can be hydraulically pushed out and replaced with a new unit while casting remains in operation.
How to Contact Us
If you have any technical questions, sample‑testing requirements or quotation demands for Press Type CNM Exchange Nozzle, welcome to get in touch with us.
Our engineering team can offer you professional support including parameter confirmation, custom drawing review and on‑site solution consultation for your continuous‑casting refractory projects.
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