B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 11/06 (2006.01) B22D 27/02 (2006.01)
Patent
CA 2143343
A strip casting apparatus comprises a pair of counter-rotating casting rolls having a vertically extending, arcuately tapering gap therebetween for containing a pool of molten metal. The gap has an open end near which is an electromagnetic dam for preventing the escape of molten metal through that open end. Various expedients are provided for improving the operation and efficiency of the dam. In one embodiment, projections of magnetic material extend from the dam in mutually overlapping relation with peripheral lips on the casting rolls. In another embodiment, the dam has a confining coil with a front surface (a) facing the open end of the gap and (b) having an arcuately tapering contour conforming to the contour of the gap. The electric current flowing through (i) the wide upper part of the confining coil's tapered front surface, facing the wide upper part of the molten metal pool, is greater than the current flowing through (ii) the narrow lowermost part of the confining coil's front surface, facing the narrow lower part of the molten metal pool.
Gerber Howard L.
Saucedo Ismael G.
Inland Steel Company
Ridout & Maybee Llp
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