Biphasic Leaching Operation for the GMDC Polymetallic Bulk Concentrate

Abstract:

A biphasic leaching operation was employed for the extraction of copper and zinc from the GMDC polymetallic bulk concentrate (PBC). Biogenerated ferric was used in cyclic manner for fed batch metal extractions from the PBC for four cycles under the pre-optimized conditions. Zn extraction was gradually decreased with each succeeding fed-batch cycle and it resulted in 67.89, 62.46, 47.37 and 14.74% of Zn extraction in 1^st, 2^nd, 3^rd and 4^th cycle respectively. In case of copper the extraction pattern was 86.63, 81.98, 75.58 and 46.51% Cu extraction in 1^st, 2^nd, 3^rd and 4^th cycle respectively. The leachate generated in each cycle was added in 15.0 L down flow packed bed column reactor having biofilm of developed consortium SR-BH-L for the ferrous bioregeneration and the obtained maximum IOR was 2650 mg/L/h. Overall results indicated that use of bioregenerated ferric iron from the leachate yielded as high as 52.2 and 2.6 g/L Zn and Cu respectively in the solution at the end of 4^th cycle. This metal concentration in the leachate is quite acceptable for economical solvent extraction process.

• Periodical: Advanced Materials Research (Volume 828)
• Pages: 117-121
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.828.117
• Online since: November 2013
• Authors: Bhargav C. Patel, Devyani R. Tipre, Shailesh R. Dave*
• Keywords: Bioleaching, Ferrous Biooxidation, Leptospirillum ferriphilum, Polymetallic Bulk Concentrate

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