Tundish Refractory Materials
Durable Tundish Lower Nozzles for Casting
Tundish lower nozzles play a critical role in achieving precise casting in steelmaking. Precise casting refers to the ability to control the flow of molten steel from the tundish to the mold with h...
DESCRIPTION
Tundish lower nozzles play a critical role in achieving precise casting in steelmaking. Precise casting refers to the ability to control the flow of molten steel from the tundish to the mold with high accuracy and consistency, resulting in a high-quality final product.
To achieve precise casting, tundish lower nozzles should be designed with careful consideration of their size, shape, and materials. The nozzle orifice’s size and shape can be customized to control the flow of molten steel and ensure a uniform and consistent flow. The nozzle should also be designed to minimize turbulence and promote a smooth flow of the molten metal.
In addition, the material used in the tundish lower nozzle should be chosen for its ability to withstand the high temperatures and chemical environment of the steelmaking process. Choosing the right material can also help prevent erosion and extend the nozzle’s lifespan.
Advanced technologies can also be incorporated into tundish lower nozzle design to improve the casting process’s precision. For example, computer-controlled flow rates and sensors can help optimize the flow of molten steel, reducing turbulence and improving product quality. Other advanced features, such as automated cleaning and maintenance systems, can minimize downtime and increase production efficiency.
| 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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