Abstract: An electromagnetic stirrer arrangement includes a housing having a bottom opening and a top opening. An electromagnetic stirrer is positioned inside the housing. A modular mold assembly includes a mold, a water jacket, a top plate, a bottom plate and a plurality of rods connecting the top and bottom plates. The mold has an open top and an open bottom. The top plate is positioned proximate to the open top of the mold and the bottom plate is positioned proximate to the open bottom of the mold. The connecting rods extend between and securing together the top and bottom plate. The modular mold assembly can easily be replaced by inserting it into or removing from the housing.

Abstract: A device for continuous or semi-continuous casting of metals, comprising a casting mold (1) which is open in both ends in the casting direction, means (2) for supplying melt to the mold (1), a first electromagnetic induction coil (4) energized by A.C. current and adapted to induce a stirring motion to the melt (7) in the mold (1), and a second electromagnetic induction coil (3) arranged upstream of the first induction coil (4) and adapted to control the stirring motion of the melt in the region adjacent to the upper free surface (5) of the melt. The second induction coil (3) 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 (1).

Abstract: A device for continuous or semi-continuous casting of metals, comprising a casting mold (1) which is open in both ends in the casting direction, means (2) for supplying melt to the mold (1), a first electromagnetic induction coil (4) energized by A.C. current and adapted to induce a stirring motion to the melt (7) in the mold (1), and a second electromagnetic induction coil (3) arranged upstream of the first induction coil (4) and adapted to control the stirring motion of the melt in the region adjacent to the upper free surface (5) of the melt. The second induction coil (3) 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 (1).

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

Abstract: A device for continuous or semi-continuous casting of metals, comprising a casting mold (1) which is open in both ends in the casting direction, means (2) for supplying melt to the mold (1), a first electromagnetic induction coil (4) energized by A.C. current and adapted to induce a stirring motion to the melt (7) in the mold (1), and a second electromagnetic induction coil (3) arranged upstream of the first induction coil (4) and adapted to control the stirring motion of the melt in the region adjacent to the upper free surface (5) of the melt. The second induction coil (3) 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 (1).

Abstract: 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.