Tundish Refractory Materials
Refractory Tundish Nozzle for High-Performance Steels
A refractory tundish nozzle is an essential component in the steel-making process for high-performance steels. The tundish is a vessel used to transfer molten steel from the furnace to the casting ...
DESCRIPTION
A refractory tundish nozzle is an essential component in the steel-making process for high-performance steels. The tundish is a vessel used to transfer molten steel from the furnace to the casting machine. The tundish nozzle regulates the flow of molten steel into the mold, ensuring a consistent flow and preventing the formation of steel defects.
High-performance steels are known for their excellent mechanical properties, high strength, and excellent corrosion resistance. However, the manufacturing process for these steels requires extreme precision and control to produce high-quality products with consistent properties. The use of a high-quality refractory tundish nozzle is essential in achieving these objectives.
The refractory material used in the tundish nozzle must be able to withstand high temperatures, chemical erosion, and thermal shock. The nozzle must also be able to resist clogging caused by the formation of solid particles or slag during the steel-making process. To achieve these properties, manufacturers use a combination of refractory materials such as alumina, zirconia, and graphite.
In addition to the material properties, the design of the tundish nozzle also plays a critical role in ensuring a consistent flow of molten steel. The nozzle must be designed to minimize turbulence and pressure drops while maintaining a consistent flow rate.
| 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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