Sulfation roasting and leaching of samarium-cobalt magnet swarf for samarium recovery
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During production of samarium cobalt magnets, a large amount of magnetic swarf is generated due to milling and cutting. This can accrue up to 30% of input materials. Recycling end-of-life magnets is equally important as these materials are critical components of aging green energy systems and a variety of electronic components. Samarium is currently listed as one of the semi-critical materials by the Critical Materials Institute and the Department of Energy. This report describes a novel sulfation, roast and leaching process for the recycling and reuse of samarium from samarium-cobalt magnet ...