PROCESS AND APPARATUS FOR ELECTROMAGNETIC CASTING OF MULTIPLE STRANDS HAVING INDIVIDUAL HEAD CONTROL

摘要

A multi-strand apparatus and process for casting molten material into at least two ingots of desired shape. Structure is provided for receiving and electromagnetically forming the molten material info ingots of desired shape. Each of the receiving and forming structures includes an inductor for applying an electromagnetic force field to the molten material. When the inductor is in operation, it is spaced from the molten material by a gap extending from the surface of the molten material to the opposing surface of the inductor. The improvement comprises a device for distributing a common alternating current to the inductors to generate the magnetic fields. A device is provided for minimizing variations in the gaps during operation of the casting apparatus. A feedback control is operatively associated with the minimizing variation device regulating the distribution device to generate substantially constant alternating current whereby changes in the force field generated by one of the inductors does not substantially effect the force field generated by another of the inductors.