INTRA-MOLD FLOW CONTROL DEVICE AND INTRA-MOLD FLOW CONTROL METHOD FOR THIN SLAB CASTING

摘要

This intra-mold flow control device for thin slab casting of steel is an intra-mold flow control device used in thin slab casting of steel having a short-edge thickness of the meniscus not exceeding 150 mm, and a casting width not exceeding 2 m, and comprises: a DC magnetic field-generating unit; an immersion nozzle having a slit formed in the bottom thereof so as to open onto the exterior, the slit joining with the bottom of a discharge hole, wherein the discharge hole and the slit are present in the DC magnetic field zone. The magnetic flux density B (in T) of the DC magnetic field zone and the distance L (in m) from the lower edge of he immersion nozzle to the lower edge of the core satisfy formula (1) and (2). Formula (1): 0.35 T≤B≤1.0 T, Formula (2): L≥0.06 m