IMMERSION NOZZLE FOR THIN CAST SLAB CONTINUOUS CASTING EQUIPMENT AND CASTING METHOD

摘要

PROBLEM TO BE SOLVED: To form a solidified shell having a uniform thickness by stabilizing a flow of molten metal discharged from an immersion nozzle under a favorable condition, and to prevent segregation of element and mixing of scum, in continuous casting of a thin cast slab by use of a moving mold such as a twin drum or a twin belt.;SOLUTION: In an equipment to continuously cast molten metal supplied to a molten metal well 3 via an immersion nozzle 6 into a thin cast slab, a number of discharge holes 10a and 10b in the immersion nozzle 6 are provided on a side facing a cooling drum 1, and directions of the discharge holes are tilted toward both left and right sides oppositely from the width center of the immersion nozzle 6 as a boundary. As a result, the flow of the molten metal discharged from the discharge holes 10a and 10b collides tiltedly against the solidified shell, which prevents remelting of the shell. Further, the flow of the molten metal proceeds to both left and right side banks 2 from the width center of the immersion nozzle 6 as a boundary, which prevents mixing of the scum floating on the molten metal well 3 into the cast slab.;COPYRIGHT: (C)2005,JPO&NCIPI