Apparatus for continuous casting using linear magnetic field for core agitation

Claim 1

In a continuous casting apparatus having a mold, a device for withdrawing the cast object from the mold and a group of rolls along the path of the withdrawn cast object for supporting the cast object during withdrawal, the improvement comprising the combination of: a fixedly positioned non-rotatable electromagnetic agitator at a position along the path of the withdrawn cast object opposite the crater of molten metal within the cast object, said electromagnetic agitator having a core on opposite sides of the path of the cast object having a plurality of deep slots therein facing the cast object, coils wound around the cores at the bottoms of the deep slots, and a housing of non-magnetic material over the cores on opposite sides of the path of the cast object, said housing for the cores having a head over the portions of the cores between the slots, said housing protecting the core and the coils; and a plurality of rolls of non-magnetic material adjacent the magnetic agitator on opposite sides thereof in the direction of the path of the withdrawn cast object for supporting the cast object being withdrawn from the mold, said non-magnetic material rolls having a diameter from one-fourth to one-half that of the remainder of the rolls, and the pitch between the smaller diameter rolls being no greater than that between the larger rolls, said smaller diameter rolls being subdivided into at least two portions in the direction of their length.