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Meeting Extraction 2018
Symposium Part C-1: Hydrometallurgy 2018
Presentation Title Activation of Chalcopyrite Particles for Improved Copper Recovery in the FLSmidth® ROL Process
Author(s) Adam P. Karcz, Anne Juul Damų, Jytte Boll Illerup, Kim Dam-Johansen, David Chaiko
On-Site Speaker (Planned) Adam P. Karcz
Abstract Scope As a means of efficiently extracting copper from chalcopyrite, FLSmidth® has developed a patented Rapid Oxidative Leaching (ROL) process, which is capable of recovering > 98% of copper in less than 6 hours. This two-step process combines a chemical pretreatment step followed by mechanically-assisted, oxidative leaching with acidic ferric sulfate lixiviants in atmospheric conditions. The pretreatment step, which uses 0.1 to 5.0 wt.% copper(II) to activate chalcopyrite, has a significant impact on the improvement of leaching kinetics. The subject of this presentation will be the investigations into the effects of copper “doping” on the mineral phase through characterization of the changes in the crystal lattice (e.g. TEM diffraction) and electronic structure (e.g. XPS binding energies). The conclusions ascertained in those studies will be supported with theoretical understanding through computational modeling using DFT code (FHI-aims), which will construct a complete story on the role of chemical activation.
Proceedings Inclusion? Planned: At-meeting proceedings


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