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Tundish Upper Nozzle
Tundish Upper Nozzle
Tundish Upper Nozzle
Tundish Upper Nozzle
Tundish Upper Nozzle
Tundish Upper Nozzle

Tundish Upper Nozzle

Tundish upper nozzles are mainly with Zirconium inserted, featuring high refractoriness, and low expansion rate, superior resistance to erosion/corrosion and thermal shock and long service life. According to customers’ different needs, ZhenAn can provide various sizes and specifications.
The Tundish Upper Nozzle is an Isostatically Pressed refractory tube. Along with the stopper, the tundish nozzle controls the flow of the steel stream while protecting it against re-oxidation before it exits the tundish. Tundish Upper Nozzles uses aluminum fusion-casting flow control system, which has good thermal insulation performance, high temperature resistance, non-stick aluminum, high strength, no delamination, and long service life.

Items Upper Nozzle Lower Nozzle Well Block
Zirconia core Outside Zirconia core Outside  
ZrO2+HfO2(%) ≥95   ≥95    
Al2O3(%)   ≥85   ≥85 ≥85
MgO(%)         ≥10
C(%)   ≥3   ≥3 ≥12
Buik Density  g/cm³ ≥5.2 ≥2.6 ≥5.1 ≥2.6 ≥2.6
Apparent porosity  % ≤10 ≤20 ≤13 ≤20 ≤21
Crushing strength  Mpa ≥100 ≥45 ≥100 ≥45 ≥45
Thermal shock resistance ≥5 ≥5 ≥5 ≥5  

1. International standard seaworthy exportable packing.
2. Wooden pallet.
3. Wooden / bamboo case (box).
4. Further packing information will be based on customer's requirements.

Our high purity and density ZrO2 tundish nozzle have the excellent shock stability, strong errosion resistance, durable working time etc features. We have the high density of 5.4g/cm3, taking the special material and technology, automatic production equipment, enough firing time, then excellent property than them. For the tundish nozzle inserts, we have making testing on 150tons ladle for 95% zirconia products, our tundish nozzle can keep working 10-12 hours, even longer.
Q: How can you control your quality?
A: For each production processing, We have complete QC system for the chemical composition and Physical properties. After production, all the goods will be tested, and the quality certificate will be shipped along with goods.

Q: Can you offer Sample ?
A: Sample is free for you in stock except for you pay the express cost.

Q: What is your lead time?
A: It usually needs about 15- 20 days after receiving the PO.