Refractory Upper Tundish Nozzle
Description The tundish upper nozzle is an essential component in the continuous casting process used in the steelmaking industry. Its main function is to control the flow of molten steel from the tundish to the casting molds, ensuring a consistent and uniform flow that promotes the quality of...
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Description
The tundish upper nozzle is an essential component in the continuous casting process used in the steelmaking industry. Its main function is to control the flow of molten steel from the tundish to the casting molds, ensuring a consistent and uniform flow that promotes the quality of the final product. Here are some of the key uses of tundish upper nozzles:
Flow control: The tundish upper nozzle regulates the flow of molten steel from the tundish to the casting molds, ensuring a consistent and uniform flow that helps to prevent defects in the final product.
Turbulence control: By controlling the flow of the molten steel, the tundish upper nozzle helps to minimize turbulence, which can lead to defects in the final product.
Oxide removal: The tundish upper nozzle helps to remove oxide buildup in the molten steel, which can negatively affect the quality of the final product.
Temperature regulation: The tundish upper nozzle can be designed to control the temperature of the molten steel, ensuring that it remains within the required temperature range for the casting process.
Chemical composition control: The tundish upper nozzle can be designed to control the chemical composition of the molten steel, ensuring that it meets the required specifications for the final product.
Specification
|
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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