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P.N.-M. Kinnunen, V.L.A. Salo, S.O. Pekhonenn, J.A. Puhakka (2003)
15th Int. Biohydrometallurgy Symp. “Biohydrometallurgy: A Sustainable Technology Evolution,”
N. Hiroyoshi, H. Miki, T. Hirajima, M. Tsunekawa (2001)
Enhancement of chalcopyrite leaching by ferrous ions in acidic ferric sulfate solutionsHydrometallurgy, 60
N. Fomchenko, O. Slavkina, V. Biryukov (2003)
Yasawa Int. Symp. on Metallurgical and Material Processing: Principles and Technologies. Aqueous and Electrochemical Processing
A two-stage technology for bacterial and chemical leaching of nonferrous metals in a specifically designed laboratory unit has been proposed. At the first stage of leaching, ferric iron formed during the second stage of oxidation of Fe2+ ions by mesophilic chemolithotrophic microorganisms was used. The optimal parameters of the first stage of the process (flow rate, temperature, and the process duration) were 2 l/h, 75°C, and 24 h, respectively. The results of testing of the two-stage technology for leaching copper-zinc raw materials indicated that the depth of zinc and copper leaching can be increased from 70 to 93% and from 40 to 58.8%, respectively, and the process duration can be reduced from 120 to 24 h as compared to the commonly used one-stage technology.
Applied Biochemistry and Microbiology – Springer Journals
Published: Jan 7, 2009
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