Table of Contents
Magnetic and Electrical Separation
Volume 5 (1993), Issue 2, Pages 93-110

Effects of Surface Finish and Material of Construction of the Separating Surface on High–Tension Electrical Separation

1The Highways, Beach Hay, Clows Top, Kidderminster, UK
2Boxmag–Rapid Ltd., Aston, Birmingham B6 4AJ, UK

Received 12 January 1993; Revised 3 July 1993

Copyright © 1993 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.


Tests with a roll type electrostatic separator have shown that the separation of minerals is affected by the material from which the roll is constructed as well as the surface finish of the roll. Experiments have been carried out with single mineral species on roll constructed of titanium, chromium–plated mild steel and aluminium with differing surface finishes. The results indicate that the surface finish influences the separation of the minerals. The effect is attributed to alteration either to the field configuration in proximity of the roll or to the particle–roll capacitance resistance.