Table of Contents
Magnetic and Electrical Separation
Volume 10, Issue 3, Pages 161-178

Purification of Fine Powders by a Superconducting HGMS With Vibration Assistance

1Department of Chemical and Metallurgical Engineering, Luleå University of Technology, Luleå S-971 87, Sweden
2Carpco Division, Outokumpu Technology Ltd., Langley, Berkshire SL3 6DA, UK

Received 4 April 2000; Accepted 25 April 2000

Copyright © 2000 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.


In this study, a superconducting high gradient magnetic separator (HGMS) with a matrix vibration system in dry mode was utilised to purify fine calcite and quartz powders smaller than 38 µm. The effects of the operating parameters (particle size, magnetic field/average air velocity (Bo /Vo), the amplitude of vibration as well as the aperture size of the expanded metal matrix) have been presented. The mechanicallybased matrix vibration with the air blowing was recognised to be effective for dry purification of fine powdered materials at high magnetic fields. The function of the matrix vibration has been discussed. In addition, the results have been empirically correlated with the operating parameters used for the purification in the separator.