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Bioleaching of primary and secondary sulphidic resources

For more than 20 years Brgm has been developing bioleaching of non-conventional resources to recover base and rare metals, with expertise in microbiology, process engineering and process integration. Lab and pilot experiments have been performed on sulphidic materials such as Kupferschiefer resources, rich in organic matter and carbonates. Also, research work led to an industrial operation to recover cobalt from pyritic tailings in Ouganda. Current developments concern 2m3 large batch tests with patented floating mixer and dedicated gas injection to increase leaching outputs and kinetics and reduce CAPEX/OPEX.