Table of Contents
Magnetic and Electrical Separation
Volume 9, Issue 2, Pages 83-94

Grade and Recovery Prediction for Eddy Current Separation Processes

Faculty of Applied Earth Sciences, Delft University of Technology, Mijnbouwstraat 120, Delft 2628 RX, The Netherlands

Received 28 March 1998; Accepted 5 May 1998

Copyright © 1998 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.


Grade and recovery of eddy current separation can be estimated on the basis of trajectory simulations for particles of simple shapes. In order to do so, the feed is characterized in terms of a small set of test-particles, each test-particle representing a fraction of the feed of a given size, shape and material. In this paper, the grade and recovery curve predicted for a sample from the 6–16mm non-ferrous fraction of car scrap is compared with experimental data. The results indicate that it may be possible to automatically control eddy current separators on the basis of such predictions.