Recarburizer
Tundish Lower Nozzles for Precise Casting
Tundish lower nozzles are an essential component in the process of precise casting. They are designed to control the flow of molten metal from the tundish into the molds with precision, ensuring th...
DESCRIPTION
Tundish lower nozzles are an essential component in the process of precise casting. They are designed to control the flow of molten metal from the tundish into the molds with precision, ensuring that the casting process is uniform and consistent.
One of the main benefits of using tundish lower nozzles is that they help to prevent turbulence in the molten metal. This is important because turbulence can cause defects in the casting, such as air pockets or inclusions. By controlling the flow of the molten metal with precision, tundish lower nozzles ensure that the metal is free from defects and of a high quality.
Tundish lower nozzles are also designed to be durable and resistant to wear and tear. They are typically made from materials such as zirconia or alumina, which can withstand the high temperatures and corrosive environment of the casting process. This ensures that the tundish lower nozzles have a long lifespan and require minimal maintenance.
| 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 | |
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