title: [Biohydrometallurgical technology of a complex copper concentrate process].
abstract: Leaching of sulfide-oxidized copper concentrate of the Udokan deposit ore with a copper content of 37.4% was studied. In the course of treatment in a sulfuric acid solution with pH 1.2, a copper leaching rate was 6.9 g/kg h for 22 h, which allowed extraction of 40.6% of copper. As a result of subsequent chemical leaching at 80 degrees C during 7 h with a solution of sulphate ferric iron obtained after bio-oxidation by an association of microorganisms, the rate of copper recovery was 52.7 g/kg h. The total copper recovery was 94.5% (over 29 h). Regeneration of the Fe3+ ions was carried out by an association of moderately thermophilic microorganisms, including bacteria of genus Sulfobacillus and archaea of genus Ferroplasma acidiphilum, at 1.0 g/l h at 40 degrees C in the presence of 3% solids obtained by chemical leaching of copper concentrate. A technological scheme of a complex copper concentrate process with the use of bacterial-chemical leaching is proposed.
authors.forename: M I
authors.initials: MI
authors.lastname: Murav'ev
authors.forename: N V
authors.initials: NV
authors.lastname: Fomchenko
authors.forename: T F
authors.initials: TF
authors.lastname: Kondrat'eva
mesh_terms: D000220:Adaptation, Biological / Q000187:drug effects; D001105:Archaea / Q000378:metabolism*; D001419:Bacteria / Q000378:metabolism*; D003300:Copper / Q000737:chemistry / Q000378:metabolism*; D019327:Copper Sulfate / Q000737:chemistry / Q000378:metabolism* / Q000494:pharmacology; D005290:Ferric Compounds / Q000737:chemistry / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology / Q000379:methods*; D007501:Iron / Q000737:chemistry / Q000378:metabolism; D008669:Metallurgy / Q000379:methods*; D010084:Oxidation-Reduction; D013057:Spectrum Analysis; D013464:Sulfuric Acids / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D013464:Sulfuric Acids; C024823:ferric sulfate; D003300:Copper; D007501:Iron; D019327:Copper Sulfate; C033158:sulfuric acid