|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Activation of Chalcopyrite Particles for Improved Copper Recovery in the FLSmidth® ROL Process
||Adam P. Karcz, Anne Juul Damų, Jytte Boll Illerup, Kim Dam-Johansen, David Chaiko
|On-Site Speaker (Planned)
||Adam P. Karcz
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.
||Planned: At-meeting proceedings