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Received June 24, 2011
Accepted October 2, 2011
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Bio-hydrometallurgical processing of low grade chalcopyrite for the recovery of copper metal
Sandeep Panda
Chinmaya Kumar Sarangi
Nilotpala Pradhan
Tondepu Subbaiah
Lala Behari Sukla†
Barada Kanta Mishra
Gur Lal Bhatoa1
Mullukutlashivram Prasad1
Subrat Kumar Ray1
Institute of Minerals & Materials Technology, CSIR, Bhubaneswar-753013, Orissa, India 1Malanjkhand Copper Project, Malanjkhand-481116, Madhya Pradesh, India
Korean Journal of Chemical Engineering, June 2012, 29(6), 781-785(5), 10.1007/s11814-011-0254-7
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Abstract
A process flowsheet was developed to recover copper metal from the lean sulfide ore of copper available at Malanjkhand, Hindustan Copper Limited (HCL), India. Copper pregnant leach solution (PLS) obtained from bio-heap leaching of chalcopyrite containing 0.3% copper was purified through solvent extraction (SX) and the copper recovered by electrowinning (EW). The copper-free raffinate obtained from SX stripping unit was returned back to the bioleaching circuit. The purity of the electrolytic copper produced at pilot scale was found to be 99.96%. During electrowinning, the effect of flow rate of electrolyte on current efficiency and energy consumption was also studied.
References
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Bouffard SC, Minerals Engineering., 15, 1115 (2008)
Dopson M, Lovgren L, Bostrom D, Hydrometallurgy., 96, 288 (2009)
McMahon AD, Copper: A material Survey, Circular Bureau of Mines, U.S. Dept. of the Interior, Bureau of Mines, Washington (1964)
Pradhan, K. C. Nathsarma, K. S. Rao, L. B. Sukla, Mishra, Minerals Engineering., 21, 355 (2008)
Rich RL, Inorganic Reactions in Water 3e Ed. Springer, Berlin, 263 (2008)
Taylor A, Copper heap leach design-Hit or Miss, ALTA Metallurgical Services (2002)
Bull AT, Korean J. Chem. Eng., 18(2), 137 (2001)
Mohapatra S, Sengupta C, Nayak BD, Sukla LB, Mishra BK, Korean J. Chem. Eng., 26(1), 108 (2009)
Sukla LB, Nathsarma KC, Mahanta JR, Singh S, Behera S, Rao KS, Subbaiah T, Mishra BK, Korean J. Chem. Eng., 26(6), 1668 (2009)
Cifuentes L, Ortiz R, Casas JM, AIChE J., 51(8), 2273 (2005)
