Tundish Lower Nozzle for Temperature Control
In addition to controlling the flow of molten steel during the continuous casting process, tundish lower nozzles are also important for temperature control. The molten steel in the tundish can l...
DESCRIPTION
In addition to controlling the flow of molten steel during the continuous casting process, tundish lower nozzles are also important for temperature control.
The molten steel in the tundish can lose heat through the walls of the container, and as a result, the temperature of the steel can drop. This can lead to issues with the quality of the castings, such as porosity or cracks. To prevent this, tundish lower nozzles are designed to maintain the temperature of the molten steel as it flows from the tundish to the mold.
One way this is achieved is by designing the nozzle with a specific length and diameter to optimize the flow of the molten steel. The length of the nozzle can be adjusted to provide sufficient residence time for the steel in the nozzle, allowing it to be heated by the refractory material and maintain its temperature as it flows towards the mold.
In addition, some tundish lower nozzles are designed with cooling channels to regulate the temperature of the nozzle itself. These channels allow a controlled flow of cooling fluid, such as water or air, to pass through the nozzle and remove excess heat. This can help to prevent the nozzle from overheating and ensure that the molten steel remains at the desired temperature as it flows through the nozzle.
| Nozzle Size | Inner Diameter (mm) | Outer Diameter (mm) | Length (mm) | Shape | Refractory Material | Flow Rate (m³/h) | Pressure Drop (bar) | Nozzle Lifetime (hours) |
|---|---|---|---|---|---|---|---|---|
| 6T | 6 | 20 | 80 | Straight | Alumina graphite | 8-10 | 0.05-0.10 | 8-12 |
| 8T | 8 | 22 | 80 | Straight | Alumina graphite | 10-12 | 0.08-0.12 | 8-12 |
| 10T | 10 | 24 | 80 | Straight | Alumina graphite | 12-15 | 0.12-0.15 | 8-12 |
| 12T | 12 | 26 | 80 | Straight | Alumina graphite | 15-20 | 0.15-0.20 | 8-12 |
| 14T | 14 | 28 | 80 | Straight | Alumina graphite | 20-25 | 0.20-0.25 | 8-12 |
| 16T | 16 | 30 | 80 | Straight | Alumina graphite | 25-30 | 0.25-0.30 | 8-12 |
| 18T | 18 | 32 | 80 | Straight | Alumina graphite | 30-35 | 0.30-0.35 | 8-12 |
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