Table of Contents
Magnetic Separation News
Volume 1, Issue 4, Pages 173-182

Analysis of Magnetic and Hydraulic Forces in an Oriented Real Matrix of a High Gradient Magnetic Separator

1Czechoslovak Academy of Sciences, Institute of Geology and Geotechnics, V Holesovickach 41, Prague 8 182 09, Czech Republic
2German Academy of Sciences, Mineral Processing Research Institute, Strasse des Friedens, Freiberg/Sachs, Germany

Received 20 September 1984

Copyright © 1985 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 application of existing theoretical models for the computation of magnetic and hydraulic forces in a real oriented matrix consisting of regularly arranged rods and wires indicates that these models produce no exact results. The differences between computations and measurements of force effects documented by Maxwell lead to the conclusion that it is necessary to start with different physical assumptions when modelling a high–gradient separation process. First of all, the magnetic field of the rods or wires system differs from the magnetic field of a single rod. Second, the particle need not be attracted to the rod surface, it is brought there by the suspension stream and the magnetic force must hold it, so that it is not entrained by the streaming suspension. As the layer of attracted particles grows, the magnetic attractive force on the surface of the growing layer decreases until the magnetic attractive force is in equilibrium with the entraining force of suspension flow.