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 Nozzle Graphic Illustration: 

1.Standard Al-C body materials that have high corrosion and thermal shock resistances.

2.Standard Al-C materials for the bowl structure that have high corrosion resistance.

3.Spinal materials for the bowl structure to assure a good fit with stopper and exceptional resistance to slag corrosion.

4.Standard Mg-based materials for the bowl structure that have good corrosion resistance to slag containing Ca.

5.Standard material to prevent Al2O3 adhesion inside the nozzle.

6.Standard argon injection structure to prevent air suction.