Tundish Refractory Materials
Tundish Nozzles for Improved Casting Performance
Tundish nozzles are a critical component in the steelmaking process, as they control the flow of molten steel from the tundish to the mold during casting. Tundish nozzles used for improved casti...
DESCRIPTION
Tundish nozzles are a critical component in the steelmaking process, as they control the flow of molten steel from the tundish to the mold during casting.
Tundish nozzles used for improved casting performance must provide precise flow control to ensure a consistent and stable flow of molten steel from the tundish to the mold. Flow control mechanisms such as internal pins, tubes, or cones are often used to regulate the flow of molten steel and prevent turbulence. This helps to minimize defects in the final product and improve casting performance.
Tundish nozzles used for improved casting performance are subject to wear and erosion from the continuous flow of molten steel. To minimize wear and prolong the lifespan of the nozzle, materials such as alumina-carbon and zirconia are often used, as they provide excellent wear resistance and are less susceptible to erosion.
| zirconia tundish upper nozzle | 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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