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US 4,936,374 AGranted
Sidewall containment of liquid metal with horizontal alternating magnetic fields
AssigneeThe United States of America as represented by the United States Department of Energy
InventorWalter F. Pareg
Life of this patent
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Abstract
An apparatus for confining molten metal with a horizontal alternating magnetic field. In particular, this invention employs a magnet that can produce a horizontal alternating magnetic field to confine a molten metal at the edges of parallel horizontal rollers as a solid metal sheet is cast by counter-rotation of the rollers.
Claims43
An apparatus for confining molten metal comprising:
- containment means having an open side;
- a magnet capable of generating a mainly horizontal alternating magnetic field, said magnet located adjacent to the open side of said containment means whereby the field generated by said magnet is capable of inducing eddy currents in a thin layer at the surface of the molten metal which interact with the magnetic field producing a force that can contain the molten metal within said containment means;
- wherein said magnet includes:
- magnetic poles located adjacent to the open side of said confinement means;
- a core connecting said poles;
- a coil encircling said core, said coil capable of being responsive to a current source;
- whereby an alternating magnetic field can be generated between said poles and parallel to the open side of said containment means so that a molten metal can be confined within said confinement means.
4 more elements
The apparatus of claim 3 in which said magnetic poles extend axially into the ends of said pair of rollers.
An apparatus for confining molten metal comprising:
- containment means having an open side comprising a pair of rollers each of said rollers including a middle portion and a rim portion, wherein said rollers are parallel and adjacent to each other in a horizontal plane and further wherein said rollers are separated by a gap, whereby counter rotation of said rollers can force the flow of a molten metal between said gap between said rollers,
- a magnet located adjacent to said open side of said containment means comprised of magnetic poles located adjacent to said open side of said containment means and extending axially into the ends of said rollers, a core connecting said magnetic poles, a coil encircling said core, said coil capable of being responsive to a current source,
- whereby an alternating magnetic field can be generated between said poles and parallel to said open side of said containment means so that a molten metal can be confined within said containment means,
- in which said middle portions of said rollers have a resistivity lower than said rim portions so that transmission of a magnetic field by said magnet through said middle portion is less than through said rim portion.
1 more element
Dependencies are inferred from the claim text.