THE SMALL-PARTICLE LIMIT FOR ELECTROMAGNETIC SEPARATION

A single rising linear ramp is used as a theoretical representation of the profile of !he magnetic field at the boundary of a single boundar y eddy-current separator. The theory for small conducting particles mo ving through such a field is developed so that,the particle trajectori es through the separation zone can be determined. Using the trajectori es, which in this case are not dependent upon particle shape, the reco very of conductors at various fields Is predicted and tile predictions are shown to compare Cell with experiment. The theory is then used to explore the small particle limit of this type of electromagnetic sepa ration.