ELECTROMAGNETIC COIL DEVICE FOR USE OF IN-MOLD MOLTEN STEEL CAPABLE OF SERVING BOTH AS ELECTROMAGNETIC STIR AND ELECTROMAGNETIC BRAKE

摘要

[PROBLEMS] To put an optimum size of a dual-purpose coil into effect. [MEANS FOR SOLVING PROBLEMS] An electromagnetic coil device is provided, which continuously casts steel for supplying AC current or DC current of three phases or more to an electromagnetic coil provided along an outer periphery of a longer side (3b) of a mold to cause an electromagnetic stir or an electromagnetic brake to selectively act on molten steel (2). The electromagnetic coil is equipped with two teeth (21a) from a yoke (21b). The teeth (21a) have inner winding (22) applied, and outer winding (23) is further applied on the outside of the two teeth (21a) having the inner winding (22) applied. A length (L) of the teeth (21a) is specified to be twice or longer than a width (W) of the teeth (21a), and/or a thickness (Y) of the yoke (21b) is specified to be twice or larger than the width (W) of the teeth (21a). On each longer side (3b), n electromagnetic coils (where n is a natural number of 2 or larger) are provided, and a magnetic core (21) is placed in a range of a vertical direction including a discharge hole (1a) of a soak nozzle (1) from a meniscus position. [EFFECTS] Sufficient stirring ability and braking ability can be assured while saving power and reducing a weight.