Table of Contents
Magnetic and Electrical Separation
Volume 11 (2002), Issue 3, Pages 127-139

The Recovery and Life Cycle Assessment of Nickel Particles in A Multi-Solenoid Open-Gradient Magnetic Separator

1Faculty of Engineering and Resources Sciences, Akita University, Akita 010-8502, Japan
2Tohoku University, Sendai, Japan
3Yokohama Metal Co. Ltd., Sagamihara, Japan

Received 21 August 2001; Accepted 14 September 2001

Copyright © 2002 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.


The recovery of 87% and the grade of 30% of Ni from nickel tip capacitors were achieved using a multi-solenoid open-gradient magnetic separator. A series of tests under varying conditions, such as density of pulp, magnetic flux density, pH, etc. have been studied. The experimental results of the purification tests were relaed to the parameters investigated. Moreover, the LCA assessment suggested that the nickel concentrate recovered by the open-gradient magnetic separator can be re-used as a raw material in pyrometallurgy, aiming to reproduce the Ni capacitor.