The main effects of submerged entry nozzle are:
1.To prevent the molten steel from being reoxidized or spilling;
2.To prevent the casting powder in crystallizer from going into the molten steel;
3.Improve the flow condition and heat-flux distribution of steel stream in crystallizer, thus promote the uniform growth of billet shell in crystallizer, which is good for the removal of gas and impurities from steel.
As refractories material submerged entry nozzle has outstanding achievement in improving billet quality, improving working conditions, stabilizing continuous casting, preventing defects on billet surface, it is widely used in slab continuous casting and bloom continuous casting.