The number of biotechnological applications of IRB, including remediation of soils and sediments contaminated with metals, radionuclides and organics, is rapidly increasing.Bioleaching of iron from kaolin using Fe(III) reducing bacteria has been studied.Nickel present in goethite has been released using IRB in case lateritic ore. A lot of progress has been made towards understanding of the phylogeny, ecology and biogeochemical role of dissimilatory iron-reducing bacteria. The known phylogenetic range of iron-reducing bacteria has expanded considerably, as has the known range of iron minerals that serve as a source of Fe(III) for anaerobic respiration. You can try IRB for processing of Chalcopyrite.I think IRB may break the Chalcopyrite structure and help in releasing copper into solution.