Table of Contents
Magnetic and Electrical Separation
Volume 6, Issue 4, Pages 243-251

Treatment of Red Mud From Alumina Production by High–Intensity Magnetic Separation

1Université de Conakry, Faculté de Mechanique, Conakry, Guinea
2Department of Mineral Processing and Environmental Protection, BERG Faculty, Technical University, Košice, Slovakia
3Institute of Geotechnics of the Slovak Academy of Sciences, Košice, Slovakia
4Department of Nonferrous Metals, Metallurgical Faculty, Technical University, Košice, Slovakia

Received 15 August 1995

Copyright © 1995 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 paper gives attention to the possibilities of magnetic separation of red mud. The red mud can be characterised as an insoluble residue originated during the bayer method application in bauxite processing. Sample of red mud was obtained by leaching of bauxite from the Fria deposit (Guinea). The wet method of high–intensity magnetic separation was applied to the treatment. The magnetic product with the Fe content of 47% and recovery of 85% was obtained under magnetic field induction of 0.06 Tesla. The best results of magnetic separation were achieved by treating the size fraction–125 μm + 90 μm.