THE ELECTROMAGNETIC SEPARATION OF METALS FROM INSULATORS

The performance of a single boundary electromagnetic separator in sepa rating mixtures of aluminium and insulating pieces is examined systema tically in an extensive series of experiments. Results are presented t hat show the variation of Al recovery with particle size, beam splitte r position and boundary Field profile. Where possible the results are compared with theoretical predictions and show these to be of value. T he minimum particle size that can be fully separated by this device is found to be about 3 mm. The results indicate that this size minimum c an be improved upon if field gradients al the boundary and tile distan ce over which a gradient exists are increased.