B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 11/06 (2006.01) B22D 27/02 (2006.01)
Patent
CA 2143346
A magnetic confining method and apparatus in accordance with the present invention generates, adjacent the open side of the roller gap, a primary vertical magnetic field (a) resulting from direct current (D.C.) or alternating current (A.C.) flowing through a coil surrounding a core of a primary electromagnet or (b) resulting from an induced horizontal current flowing through roller shafts, roller sleeves and the edge of the molten metal. There are one or more additional vertical magnetic fields, that serve to concentrate and/or shape the primary magnetic field, and the vertical fields combine to provide electromagnetic forces sufficient for containment of the molten metal in the vertical gap between the rollers. Both the primary vertical field and one or more additional or secondary vertical magnetic fields extend through the open side of the gap to the molten metal in the gap. The combination of magnetic fields cooperate to provide sufficient electromagnetic force over the depth of the molten metal, at the molten metal sidewall to electromagnetically confine the molten metal within the gap between the rollers and stabilize the molten metal at the sidewall.
Inland Steel Company
Ridout & Maybee Llp
LandOfFree
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