Abb Inc.

J. Mulcahy Enterprises Inc.

Abb Group Services Center Ab

Leonid Beitelman

Joseph A Mulcahy

Vladimir Segal

Christopher P Curran

A device for continuous or semi-continuous casting of metals, comprising a casting mold () which is open in both ends in the casting direction, means () for supplying melt to the mold (), a first electromagnetic induction coil () energized by A.C. current and adapted to induce a stirring motion to the melt () in the mold (), and a second electromagnetic induction coil () arranged upstream of the first induction coil () and adapted to control the stirring motion of the melt in the region adjacent to the upper free surface () of the melt. The second induction coil () is arranged to be interchangeably energized by either D.C. or A.C. current. The invention also relates to methods for control of stirring motion in a casting mold ().

Method and device for continuous casting of metals in a mold

Cooling of the electrical coils of an electromagnetic stirrer is effected using a ferrofluid.

Cooling electromagnetic stirrers

An induction stirring method wherein molten metal is electromagnetically stirred during continuous casting in a mold includes control of velocity of the stirring motion at the meniscus and the region adjacent to it, either to decrease or enhance the stirring of the molten metal produced by the main electromagnetic stirrer. An A.C. magnetic stirring modifier is positioned adjacent the region of meniscus to produce electromagnetic stirring of the molten metal at the meniscus, either to oppose the rotary motion of the main electromagnetic stirrer and provide a surface free from the stirring motion or to enhance the rotary stirring motion of the main magnetic stirrer. These two alternative modes of operation permit a casting machine to be used for casting molten metals requiring widely varying operating conditions.

Growing community of inventors

Thornhill, Canada

Leonid Beitelman