رونگشینگ ریفریکٹریز فیکٹری
The tundish nozzle is a refractory component used in the continuous casting process of steelmaking. Located at the bottom of the tundish, it controls the flow of molten steel into the crystallizer. Ladle nozzles are typically made of materials such as alumina, zirconium oxide, and graphite, possessing properties of high temperature resistance and chemical corrosion resistance, and enabling precise regulation of the molten steel flow rate.
Tundish introduction
The tundish, located between the ladle and the crystallizer, primarily functions to regulate the molten steel flow rate, stabilize the molten steel temperature, and achieve purification and uniform distribution.
Tundish nozzle of physicochemical properties
| Chemical and Physical Properties | RSTN-AIC75 | RSTN-AIC80 | RSTN-AI75 | RSTN-Zr96RS | RSTN-Zr65 |
| Al2O3 ≥ % | 75 | 80 | 94 | -85 | – |
| ZrO2≥% | – | – | (Insert) 92-96 | 65 | |
| C≥% | 4 | 4 | – | – | – |
| Apparent porosity ≤ | 8 | 7 | 15 | 9 | 20 |
| Bulk density g/m3≥ | 2.90 | 2.95 | 2.95 | 3.05 | 3.5 |
| Compressive strength (ایم پی اے)≥ | 60 | 60 | 120 | 80 | – |
| High temperature bending strength (ایم پی اے) (1400*0.5h) ایم پی اے;z | 6 | 7 | 15 | 20 | – |
Zirconia insert–intergral material only zirocnia material.
| Chemical and Physical Properties | RSZR60 | RSZR70 | RSZR80 | RSZR85 | RSZR95 |
| ZrO2 ≥ % | 60 | 70 | 80 | 90 | 95 |
| Apparent porosity≤ | 21 | 20 | 18 | 15 | 6 |
| Bulk density g/m3 ≥ | 3.70 | 3.90 | 4.0 | 4.35 | 5.2 |
| Refractories≥℃ | 1800 | 1800 | 1850 | 1900 | 1900 |
Function of the ladle nozzle
Features of the tundish nozzle
- Quick-change tundish sprue nozzles slide rapidly and precisely, without flow deviation or steel leakage.
- Excellent corrosion resistance, no significant diameter expansion, long service life, and no flow deviation or spillage.
- Good thermal shock resistance and excellent explosion resistance.
- Custom-made products can be quickly customized according to customer requirements.
Tundish sprue nozzles offer advantages such as heat insulation, reduced nozzle surface temperature, reduced heat loss, lighter weight, increased strength, and extended service life.
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