Patent ID: 7156154

Claim:
A device for continuous or semi-continuous casting of a metal material, wherein the device comprises: a casting mould which allows casting of a metal material to a desired shape, means for supplying a molten metal material to the casting mould; a first arrangement comprising a coil having an extension around the casting mould in a moulding area arranged to comprise molten metal material and which coil is arranged to be fed with an alternating current in such a way that a varying magnetic field is generated and is applied to the molten metal material in the casting mould; and a second arrangement comprising at least two magnetic poles which are provided at opposite sides of the casting mould and which poles are arranged to supply a static or periodic low-frequency magnetic field to the molten metal material in the moulding areas, wherein said poles comprise at least a portion which comprises a plurality of material layers which are electrically insulated from each other, wherein each of said material layers comprises plate shaped elements having two substantially plane lateral surfaces which have an extension in a plane substantially perpendicular to the direction of the current (I) in the most closely located part of the coil; wherein the coil of the first arrangement and at least one of the poles of the second arrangement are provided in contact with each other.