Enrichment of Cobalt Values by Dry Magnetic Separation from Low .Journal of Minerals & Materials Characterization & Engineering, Vol. 8, No.4, pp 317-327, 2009 jmmce Printed in the USA. All rights reserved. 317. Enrichment of Cobalt Values by Dry Magnetic Separation from Low-Grade. Manganese Ores of Bonai-Keonjhar Belt, Orissa. 1. P. P. Mishra,. 1. B. K. Mohapatra*,. 2.magnetic enrichment of manganese ore,from Tailings Material of Ghana Manganese Company (GMC) - AJOLAn investigation was conducted for the enrichment of manganese oxide tailings generated by a spiral concentration plant at. Ghana Manganese . of light minerals. A Davies Dry Disc Magnetic Separator, Model No. 13008/350/4.5V fed with 300 g of each fraction was used for the magnetic separation. However, due to.