Abstract
INVESTIGATION of the possible use of alternating current in magnetic separation, either in the direction of obtaining a rotary field by polyphase currents, or otherwise, has hitherto not resulted in any useful discovery. Recently, however, Mr. W. M. Mordey, past president of the Institution of Electrical Engineers, by arranging poles energised by two-phase currents to follow one another across the stream, has succeeded in driving iron minerals and iron compounds in that direction. This effect is not one of ordinary magnetic attraction and repulsion, but apparently a display of “hysteretic repulsion,” a repulsion consequent upon the magnetism residual after each alternation, and made continuous by the moving field contributed by polyphase current.
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TRUSCOTT, S. Alternating-Current Mineral Separation1. Nature 109, 556–557 (1922). https://doi.org/10.1038/109556a0
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DOI: https://doi.org/10.1038/109556a0