High Quality Refractory Lower Tundish Nozzle
Tundish lower nozzles are components used in steelmaking to control the flow of molten steel from the tundish to the mold. The lower nozzle is installed at the bottom of the tundish and is designed...
DESCRIPTION
Tundish lower nozzles are components used in steelmaking to control the flow of molten steel from the tundish to the mold. The lower nozzle is installed at the bottom of the tundish and is designed to withstand high temperatures and provide a stable flow of steel into the mold. They are available in various materials such as alumina-carbon, magnesia-carbon, and zirconia, depending on the specific needs of the steelmaking process. The tundish lower nozzle plays a crucial role in ensuring the quality and consistency of the final steel product.
Tundish lower nozzles are typically used in steelmaking processes to control the flow and distribution of molten steel from the tundish to the continuous casting mold. The main purpose of tundish lower nozzles is to regulate the flow rate and prevent turbulence or splashing, which can affect the quality of the final steel product.
To ensure proper functionality and efficiency, tundish lower nozzles are often packed with specialized materials, such as alumina or zirconia-based materials. These materials provide high thermal shock resistance, chemical stability, and erosion resistance, which are critical in the harsh and high-temperature environments of steelmaking operations.
| Items | Upper Nozzle | Lower Nozzle | ||
| Zirconia core | Outside | Zirconia core | Outside | |
| ZrO2+HfO2(%) | ≥95 | ≥95 | ||
| Al2O3(%) | ≥85 | ≥85 | ||
| MgO(%) | ||||
| C(%) | ≥3 | ≥3 | ||
| Buik Density g/cm³ | ≥5.2 | ≥2.6 | ≥5.1 | ≥2.6 |
| Apparent porosity % | ≤10 | ≤20 | ≤13 | ≤20 |
| Crushing strength Mpa | ≥100 | ≥45 | ≥100 | ≥45 |
| Thermal shock resistance | ≥5 | ≥5 | ≥5 | ≥5 |
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