Tundish Nozzle for Continuous Casting of Steel
A tundish nozzle is an essential component used in the continuous casting process of steel. It is a refractory lined pipe-like structure that is situated at the bottom of a tundish. The tundish is ...
DESCRIPTION
A tundish nozzle is an essential component used in the continuous casting process of steel. It is a refractory lined pipe-like structure that is situated at the bottom of a tundish. The tundish is an intermediate vessel between the ladle and the mold during continuous casting.
The main function of the tundish nozzle is to regulate the flow of molten metal from the tundish to the mold. It is designed to control the composition, temperature, and cleanliness of the steel at the point of casting. The tundish nozzle is responsible for stabilizing the flow of the molten steel in the mold, controlling the momentum of the steel stream, and preventing air ingestion into the mold.
The tundish nozzle is made from high-quality refractory materials that have excellent thermal shock resistance, high thermal conductivity, and low thermal expansion. The materials used for making the nozzle vary depending on the composition of the molten steel being cast and the casting conditions.
In terms of design, tundish nozzles come in different shapes and sizes, depending on the characteristics of the molten steel and the casting process. Some of the factors that determine the design include the viscosity of the molten steel, the pouring rate, the casting temperature, and the size of the mold.
| Item | SX-1 | SX-2 | SX-3 | SX-4 | SX-5 | SX-6 | SX-7 | SX-8 |
| ZrO2+(Hf)O2% | >=70 | >=75 | >=80 | >=85 | >=90 | >=93 | >=93 | >=93 |
| Bulk Density g/cm3 | >=3.8 | >=4.0 | >=4.2 | >=4.4 | >=4.6 | >=4.9 | >=5.1 | >=5.2 |
| Apparent Porosity % | <=22 | <=22 | <=20 | <=20 | <=20 | <=15 | <=13 | <=10 |
| Mpa Compressive Strength | >=80 | >=80 | >=80 | >=80 | >=80 | >=90 | >=90 | >=100 |
| Thermal Shock Resistance (1100ºC cold water) | >5 | >5 | >5 | >5 | >5 | >5 | >5 | >5 |
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