Abstract
Electromagnetic molds are presently being used in the continuous casting of aluminum billets and slabs. Various theoretical models that can be used to predict electromagnetic pressure differentials and forces for this application are examined. Dimensionless pressure and force factors are first derived using a one-dimensional field model. These factors are then refined using a two-dimensional semi-infinite model. This latter model is also used to examine the effect that coil coupling has on the field strength, pressures and forces. Finally, the coupled circuit method is used to predict pressure distributions for an actual mold geometry, including the essential effect of the field shaping short-circuited turn (screen). The effect of varying the location of the inductor and screen is examined.
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