Frontiers of Chemical Science and Engineering >
Silver-catalyzed bioleaching for raw low-grade copper sulphide ores
Received date: 18 Apr 2008
Accepted date: 19 Oct 2008
Published date: 05 Sep 2009
Copyright
This research was conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphide ores located in the Xinjiang Autonomous Region of China using adapted Thiobacillus ferrooxidans bacteria. In order to accelerate the bioleaching rate, the adapted mixed bacteria and silver ion catalyst were tested in the leach columns at laboratory scale. The overall acid consumption was 4.3 kg sulphuric acid per kg of dissolved copper and was linearly related to the percent copper dissolution. The calculated copper dissolution rates obey the Shrinking Core Model. The relative activation energy of the whole biooxidative leaching stages was calculated to be 48.58 kJ/mol.
Key words: green process; biohydrometallurgy; bioleaching; reaction kinetics; sulphide ores
Tianlong DENG , Yafei GUO , Mengxia LIAO , Dongchan LI . Silver-catalyzed bioleaching for raw low-grade copper sulphide ores[J]. Frontiers of Chemical Science and Engineering, 2009 , 3(3) : 250 -254 . DOI: 10.1007/s11705-009-0049-0
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