The quality is stable,the service life is long,according to the different user,the different steel,the diff erent protection,slag and the continuous casting technology level,the product material ratio is adjusted,gurantees meets the user’s request,receives the general user the consistent high praise.
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, AGMC can provide various sizes and specifications.
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.
Chemical analysis and Physical Properties:
| 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 | |
Tundish Metering Nozzle