Table of Contents
Physical Separation in Science and Engineering
Volume 12 (2003), Issue 2, Pages 87-101

Improvements in Separation of Non-Ferrous Scrap Metals Using an Electromagnetic Sensor

1Department of Applied Earth Sciences, Faculty of Civil Engineering and Geosciences, Mijnbouwstraat 120, Delft 2628 RX, The Netherlands
2Faculty of Design, Construction and Production, Mekelweg 2, Delft 2628 CD, The Netherlands

Received 30 December 2002; Revised 27 January 2003

Copyright © 2003 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.


This article describes a new method for identification and separation of non-ferrous scrap metals using an electromagnetic sensor that is based on the eddy current principle. The electromagnetic sensor (EMS) is a prototype system that has been developed by Delft University of Technology in co-operation with industry. Experimental results obtained with different non-ferrous metals are presented. The theory behind the sensor and the main components of the system are described.