Wabush Mines Manganese Reduction

CIM Montreal 2011
Abstract Wabush Mines’ Scully Mine has been in operation since 1965 and is now entirely owned by Cliffs Natural Resources. It produces iron concentrate with 65% iron content and has a capacity of 5.5 million tons per year. The type of ore is Hematite with a low percentage of Magnetite. The ore deposit also contains a variable content of manganese. High and low manganese reserves are blended together to produce target final manganese content of 1.2% or 2.0%.
Today, reserves of low manganese ore are becoming scarce and blending alone will not suffice to meet desired final product grade. New ability to reduce manganese is required in the Concentrator. After successful trials since 2005, Scully Mine’s Concentrator now operates since 2010 with a first line of manganese reduction using rare earth magnets. The manganese reduction is approximately 50%. The magnets are also removing 50% of the silica.
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