Table of Contents
Physical Separation in Science and Engineering
Volume 13, Issue 1, Pages 15-23
http://dx.doi.org/10.1080/00207390410001710726

Eddy Current Separation of Fine Non-Ferrous Particles from Bulk Streams

1DICAMP – University of Trieste, Piazzale Europa No. 1, Trieste 34127, Italy
2Delft University of Technology, Mijnbouwstraat 120, Delft 2628 RX, The Netherlands

Received 13 March 2004; Revised 13 April 2004

Copyright © 2004 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Recovery of fine non-ferrous metals from waste streams is a notoriously difficult problem in eddy current separation technology. Existing processes either have a low capacity or an incomplete recovery for particle sizes below 5 mm. In a new process, the particles are fed slightly wet to make them stick to the surface of the conveyor belt. The action of the magnet rotor makes the non-ferrous particles tumble, so that they break loose from the belt and end up in front of the rotor. The new process combines a relatively high capacity with an almost complete recovery, even for heavy and poorly conducting non-ferrous metals.