Arrangement and method for flow control of molten metal in a continuous casting process

A method for flow control of molten metal in a vessel for a continuous casting process,

• the vessel having a first opening for receiving the molten metal, a second opening for discharging the molten metal and a body extending between the first opening and the second opening,
• wherein a first magnetic arrangement is attached to the body, the first magnetic arrangement having a magnetic core with legs, and coils arranged around the legs,
• a power system configured to provide an alternating current and a carrier current to each of the coils, a second magnetic arrangement attached to the body, wherein the power system is arranged to feed the second magnetic arrangement with direct current with no other signals superimposed thereon, and
• wherein the first magnetic arrangement is arranged upstream of the second magnetic arrangement with respect to a flow direction of the molten metal, the flow direction being defined from the first opening to the second opening, the method comprising:
• providing, with the power system, an alternating current and a carrier current, the alternating current being superimposed on the carrier current, to each coil of the first magnetic arrangement, each pair of alternating current and carrier current provided to a coil forming a flow control current, wherein flow control currents provided to adjacent coils are phase shifted relative each other, thereby creating a travelling magnetic field in the molten metal in the vessel.