Tundish Refractory Materials
Continuous Casting Tundish Upper Nozzle
ZhenAn Tundish Upper Nozzle with Zirconia Insert Nozzle is suitable for continuous cast tundish open cast steel. The zirconium insert is made of high-purity zirconia, which is formed by high-...
DESCRIPTION
ZhenAn Tundish Upper Nozzle with Zirconia Insert Nozzle is suitable for continuous cast tundish open cast steel. The zirconium insert is made of high-purity zirconia, which is formed by high-pressure molding and sintering at high temperature. The outer is made of corundum and high-quality aluminum vanadium. It is formed by high pressure molding and baked at low temperature.
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.
| Item | Upper Nozzle | |
| Zirconia core | Outside | |
| ZrO2+HfO2(%) | ≥95 | |
| Al2O3(%) | ≥85 | |
| MgO(%) | ||
| C(%) | ≥3 | |
| Buik Density g/cm³ | ≥5.2 | ≥2.6 |
| Apparent porosity % | ≤10 | ≤20 |
| Crushing strength Mpa | ≥100 | ≥45 |
| Thermal shock resistance | ≥5 | ≥5 |
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