Tundish Refractory Materials
Tundish Nozzles for Seamless Continuous Casting
Seamless continuous casting is a widely used steel casting technique that involves the continuous feeding of molten steel into a tundish and then pouring it through a submerged entry nozzle (SEN) i...
DESCRIPTION
Seamless continuous casting is a widely used steel casting technique that involves the continuous feeding of molten steel into a tundish and then pouring it through a submerged entry nozzle (SEN) into a mold. The tundish nozzle plays a critical role in ensuring smooth and consistent flow of molten steel, which is essential for high-quality steel casting.
Here are some features of tundish nozzles that are optimized for seamless continuous casting:
- High precision flow control: Tundish nozzles used in seamless continuous casting require precise flow control to maintain a stable and consistent flow rate. This is achieved through the use of flow control mechanisms such as internal pins or tubes that regulate the flow of molten steel.
- Excellent thermal shock resistance: Tundish nozzles used in seamless continuous casting must be able to withstand rapid temperature changes and thermal shock. Alumina-carbon tundish nozzles are a popular choice for seamless continuous casting applications, as they provide excellent thermal shock resistance and can withstand high-temperature environments.
- Wear resistance: Tundish nozzles used in seamless continuous casting are subject to wear and erosion from the continuous flow of molten steel. Zirconia tundish nozzles are an excellent choice for seamless continuous casting applications, as they provide high resistance to wear and corrosion and can withstand high-temperature environments.
- Easy installation and maintenance: Tundish nozzles used in seamless continuous casting must be easy to install and maintain to minimize downtime and maximize productivity. Graphite tundish nozzles are a suitable option for seamless continuous casting applications, as they are easy to machine and install, and provide a reliable and consistent flow of molten steel.
| Item | Upper Nozzle | |
| Zirconia core | Outside | |
| ZrO2+HfO2(%) | ≥95 | |
| Al2O3(%) | ≥85 | |
| MgO(%) | ||
| C(%) | ≥3 | |
| Buik Density g/cm³ | ≥5.2 | ≥2.6 |
| Apparent porosity % | ≤10 | ≤20 |
| Crushing strength Mpa | ≥100 | ≥45 |
| Thermal shock resistance | ≥5 | ≥5 |
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