Tundish Refractory Materials
High-Pressure Tundish Nozzle for Efficient Casting
A high-pressure tundish nozzle is an essential component in the casting process of steel and other metals. Its purpose is to regulate the flow of molten metal from the tundish to the mold, ensuring...
DESCRIPTION
A high-pressure tundish nozzle is an essential component in the casting process of steel and other metals. Its purpose is to regulate the flow of molten metal from the tundish to the mold, ensuring efficient and uniform casting.
The design of a high-pressure tundish nozzle focuses on two main factors: flow control and durability. The nozzle must be able to handle high-pressure flow rates of molten metal without wearing out or clogging.
One common design for a high-pressure tundish nozzle is a double-layered structure. The inner layer, usually made of zirconia or alumina, provides a smooth surface to minimize turbulence and maintain a consistent flow rate. The outer layer, made of a more durable material like silicon carbide or graphite, provides protection against erosion and thermal shock.
Other design features of a high-pressure tundish nozzle include a tapered shape to control the velocity of the molten metal and reduce turbulence, and a sliding gate mechanism to control the flow rate. A properly designed and maintained tundish nozzle can significantly improve casting efficiency and reduce costs associated with defects and downtime.
| Upper Nozzle-Insert | |||||
| ZrO2 % Min. | 64 | 69 | 79 | 93 | 94 |
| Bulk Density g/cm3 Min. | 3.6 | 3.7 | 3.9 | 4.3 | 4.3 |
| Apparent Porosity % Max. | 23 | 23 | 23 | 21 | 21 |
| Cold Crushing Strength MPa Min. | 80 | 80 | 80 | 100 | 100 |
| Refractoriness ℃ Min. | 1790 | 1790 | 1790 | 1790 | 1790 |
| Upper Nozzle-Body | ||||
| Al2O3 % Min. | 65 | 75 | 65 | 80 |
| MgO % Min. | 10 | |||
| C % Min. | 3 | 3 | ||
| Bulk Density g/cm3 Min. | 2.3 | 2.4 | 2.9 | 3.0 |
| Apparent Porosity % Max. | 25 | 25 | 10 | 10 |
| Cold Crushing Strength MPa Min. | 60 | 60 | 40 | 60 |
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