SUBMERGED NOZZLE OF CONTINUOUS CASTING APPARATUS

摘要

It is an object of the present invention to achieve improvement in the quality of cast metal by generating a stable rotational flow of molten steel inside a mold. The present invention provides a submerged nozzle for continuous casting of molten metal, wherein two or more discharge hole flow passages (2) are provided on a cylindrical side surface of a submerged nozzle (3), and first and second inner surface side walls (6, 7) and first and second outer surface side walls (10, 11) of the discharge hole flow passages (2) in a horizontal cross-section of the submerged nozzle (3) when in use are composed by straight lines formed so as to be inflected at an inner side point (5) of inflection and an outer side point (9) of inflection, it is possible to improve the quality of cast metal by generating a stable rotational flow of molten metal inside a mold, simply by improving the shape of the discharge hole flow passages of the submerged nozzle, without making modifications to other equipment.