The effect of continuous casting long nozzle

Source: | Author:ChangXing Refractory | Published time: 1414 days ago | 1068 Views | Share:

In the continuous casting operation, the long nozzle is located at the sliding nozzle of the ladle, and its main function is to prevent the molten steel from contacting the atmosphere and oxidizing when it flows to the tundish.

Compared with the submerged entry nozzle, the long nozzle has a higher probability of cracks or breakage during use, so in the process of material selection, more attention should be paid to its crack resistance. Because in terms of appearance, the long nozzle is larger and heavier, and the mechanical shock is much greater whether it is during installation or use. Moreover, compared with the submerged entry nozzle, the long nozzle does not have a special preheating device, so it needs to withstand more severe heat during use.

For the corrosion resistance of the long nozzle, these parts are mainly emphasized.

1. The position in contact with molten steel;
2. The position where it is immersed in the inner hole and the slag line.

Since the joint between the long nozzle and the ladle is easy to enter air, the molten steel at this location is prone to oxidation and corrosion.