FLOW DEVIATION PREVENTING IMMERSED NOZZLE

摘要

A flow deviation preventing immersed nozzle for preventing the deviation of discharged flow due to the deviation of flow in a bore portion in an immerse d nozzle used for continuous casting of steel, characterized in that the immersed nozzle with two opposed discharge ports has one or more bore constricted regions in a bore region located above the discharge ports, the bore constricted region nearest the discharge ports being a bore oval constricted region with its bore being oval in horizontal section, the longitudinal direction of the oval shape being substantially parallel with t he direction of the discharge ports. The bore oval constricted region is a bore constricted region that is the second nearest to the discharge ports, the lower end surface of the bore oval constricted region nearest the discharge ports being located 0.3H - 2H based on the discharge port level H above the upper ends of the discharge ports, the spacing between it and the bore oval constricted region located thereabove being 0.3D - 2D based on the bore diameter D, the respective lengths of the bore constricted regions being 0.5 D - 5D.