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Minerals 2018, 8(10), 461;

Synchrotron Radiation XRD Investigation of the Fine Phase Transformation during Synthetic Chalcocite Acidic Ferric Sulfate Leaching

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Key Lab of Bio-hydrometallurgy of Ministry of Education, Changsha 410083, China
Author to whom correspondence should be addressed.
Received: 7 August 2018 / Revised: 10 September 2018 / Accepted: 12 October 2018 / Published: 17 October 2018
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The fine phase transformation process of chalcocite (Cu2S) leaching in acidic ferric sulfate solution was studied by leaching experiments and synchrotron radiation X-ray diffraction (SRXRD) tests. The results showed that the dissolution process of chalcocite was divided into two stages. In the first stage, Cu2S was firstly transformed to Cu5FeS4 and Cu2−xS, then the galvanic effect between Cu5FeS4 and Cu2−xS accelerated the dissolution process of Cu1.8S → Cu1.6S → CuS, and finally Cu5FeS4 was also transformed to CuS. While in the second stage, CuS was transformed to elemental sulfur, which formed the passivation layer and inhibited the leaching of chalcocite. Specifically, Cu5FeS4 was detected during the chalcocite leaching process by SRXRD for the first time. This research is helpful for revealing the detailed leaching process of chalcocite. View Full-Text
Keywords: synchrotron radiation; SRXRD; chalcocite; leaching; ferric ions synchrotron radiation; SRXRD; chalcocite; leaching; ferric ions

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Fang, C.; Yu, S.; Wang, X.; Zhao, H.; Qin, W.; Qiu, G.; Wang, J. Synchrotron Radiation XRD Investigation of the Fine Phase Transformation during Synthetic Chalcocite Acidic Ferric Sulfate Leaching. Minerals 2018, 8, 461.

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