A Comparison of Bioleaching Behavior of Two Pure Chalcopyrite Minerals through Investigating Chalcopyrite Crystallographic Properties

Abstract:

Chemical element analysis and X-ray diffraction (XRD) analysis showed that the two chalcopyrite minerals were of high purity. A mixed culture of moderately thermophiles was used for chalcopyrite bioleaching at 45°C and the copper recovery of chalcopyrite (a) and chalcopyrite (b) was 66.1% and 21.4%, respectively, after 19 days of leaching. Bioleaching behavior of the two different chalcopyrite samples was studied through comparing the lattice parameter and grain size of chalcopyrite. It was shown that lattice parameter and grain size are not the key factors affecting the leaching of chalcopyrite. The corrosion current density of chalcopyrite (a) calculated through Tafel curves was 1.149 μA/cm², while that of chalcopyrite (b) was only 0.5696 μA/cm². The higher corrosion current density suggested that chalcopyrite (a) can be more easily dissolved than chalcopyrite (b).

• Periodical: Solid State Phenomena (Volume 262)
• Pages: 164-167
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.262.164
• Online since: August 2017
• Authors: Yansheng Zhang*, Jia Ming Zhang, Bo Zhang, Ke Xin Chang, Jun Wang, Jian Ping Xie, Wen Qing Qin, Guan Zhou Qiu
• Keywords: Bioleaching, Chalcopyrite, Crystallographic Property, Electrochemistry

References

[1] E.M. Córdoba, J.A. Muñoz, M.L. Blázquez, F. González, A. Ballester, Leaching of chalcopyrite with ferric ion. Part I: General aspects, Hydrometallurgy 93 (2008) 81-87.

DOI: 10.1016/j.hydromet.2008.04.015

[2] Acevedo Fernando, The use of reactors in biomining processes, Electron. J. Biotechnol. 3 (2000) 10-11.

[3] Y. Li, N. Kawashima, J. Li, A.P. Chandra, A.R. Gerson, A review of the structure, and fundamental mechanisms and kinetics of the leaching of chalcopyrite, Adv. Coll. Interf. Sci. 197-198 (2013) 1-32.

DOI: 10.1016/j.cis.2013.03.004

[4] Hongbo Zhao, Jun Wang, Xiaowen Gan, Xihua Zheng, Lang Tao, Minghao Hu, Yini Li, Wenqing Qin, Guanzhou Qiu Zhao, Effects of pyrite and bornite on bioleaching of two different types of chalcopyrite in the presence of Leptospirillum ferriphilum, Biores. Technol. 194 (2015).

DOI: 10.1016/j.biortech.2015.07.003

[5] Yingbo Dong, Hai Lin, Kaibin Fu, Xiaofang Xu, Shanshan Zhou, Bioleaching of two different types of chalcopyrite by Acidithiobacillus ferrooxidans, Int. J. Miner. Metall. Mater. 20 (2013) 119-124.

DOI: 10.1007/s12613-013-0702-y

[6] C. Gómez, M. Figueroa, J. Muñoz, M.L. Blázquez, A. Ballester, Electrochemistry of chalcopyrite, Hydrometallurgy 43 (1996) 331-344.

DOI: 10.1016/0304-386x(96)00010-2

[7] Guohua Gu, Keting Hu, Xun Zhang, Xianxue Xiong, Huisha Yang, The stepwise dissolution of chalcopyrite bioleached by Leptospirillum ferriphilum, Electrochim. Acta 103 (2013) 50-57.

DOI: 10.1016/j.electacta.2013.04.051

[8] Hongbo Zhao, Jun Wang, Wenqing Qin, Minghao Hu, Shan Zhu, Guanzhou Qiu, Electrochemical dissolution process of chalcopyrite in the presence of mesophilic microorganisms, Miner. Eng. 71 (2015) 159-169.

DOI: 10.1016/j.mineng.2014.10.025