Tundish Refractory Materials
Tundish Lower Nozzles for Smooth and Continuous Steel Production
Tundish lower nozzles are an essential component in the steel production process, as they play a critical role in controlling the flow of molten steel from the tundish into the mold. The tundish is...
DESCRIPTION
Tundish lower nozzles are an essential component in the steel production process, as they play a critical role in controlling the flow of molten steel from the tundish into the mold. The tundish is a reservoir that holds the molten steel, and the nozzle is located at the bottom of the tundish, controlling the flow of the steel into the mold. The quality of the nozzle and its design can have a significant impact on the quality of the final product and the overall efficiency of the casting process.
One of the most critical factors to consider when designing tundish lower nozzles is to ensure a smooth and continuous flow of molten steel into the mold. Any interruptions in the flow can cause issues such as turbulence, which can result in defects in the final product, leading to increased scrap rates and lower productivity. A well-designed nozzle should promote a consistent flow of steel, minimizing turbulence and ensuring a uniform distribution of the molten metal.
Another important factor to consider is the durability of the nozzle. The tundish lower nozzle is exposed to extremely high temperatures, abrasive materials, and corrosive elements, which can lead to wear and tear. Choosing a material that can withstand these conditions and designing the nozzle to resist erosion and corrosion can extend its lifespan and minimize maintenance requirements.
The use of advanced technologies in tundish lower nozzle design can further improve the casting process’s efficiency and quality. 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.
| Item | UN-1 | UN-2 | UN-3 | UN-4 | UN-5 | UN-6 | |
| Chemical composition(%)≥ | AI2O3 | 80 | 75 | 80 | 68 | 60 | 65 |
| MgO | – | – | – | – | – | ||
| C | ≤6 | ≤6 | ≥3 | ≥4 | ≥4 | ≥4 | |
| Bulk density (g/cm3)≥ | 2.90 | 2.80 | 2.90 | 2.70 | 2.60 | 2.65 | |
| Apparent porosity (%)≤ | 15 | 15 | 15 | 15 | 15 | 15 | |
| Cold Crushing Strength(MPa)≥ | 70 | 60 | 40 | 40 | 40 | 25 | |
| Specifications could be adjusted as request. | |||||||
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