Tundish Upper Nozzle With Zircon Insert
Tundish upper nozzles are typically made of high-quality refractory materials, such as alumina, zirconia, or magnesia, that can withstand the high temperatures and corrosive nature of the molten steel.
Beschrijving
Description
Alumina-based tundish upper nozzle: Alumina-based tundish upper nozzles are commonly used in the steelmaking industry due to their high-temperature resistance and chemical stability. The typical chemical composition of an alumina-based tundish upper nozzle is 90% Al2O3, with small amounts of SiO2, MgO, and other trace elements.
Zirconia-based tundish upper nozzle: Zirconia-based tundish upper nozzles are also commonly used in the steelmaking industry due to their high-temperature resistance and toughness. The typical chemical composition of a zirconia-based tundish upper nozzle is 94% ZrO2, with small amounts of MgO, Y2O3, and other trace elements.
Specification
|
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 |
|
Populaire tags: tundish upper nozzle with zircon insert
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