Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

2 Publications
Flue dust from the copper converter process - Recovery of Cu and In by solvent extraction
Rädecker, P.; Scharf, C.; Zürner, P.; Frisch, G.; Pieplow, G.; Lindner, D.; Koch, J.;
Flue dusts from copper metallurgy are resources for base metals such as copper, zinc, tin or lead. However, there is also a potential for the recovery of strategic elements like indium. At the moment flue dusts are recirculated within the copper process, but residues are available from historic produc-tion processes.
Hydrometallurgical processes seem to be a promising method to recover the base and strategic met-als from these fine-grained flue dusts. In preparation for further processing, the secondary material was characterized by mineral liberation analysis (MLA) and electron probe micro analysis (EPMA). An iron- and zinc-rich spinel phase (Zn,Fe,Mn)(Fe,Mn)2O4 was detected as the main phase (76 wt.-%) in the flue dust. The chemical composition of the flue dust was analysed by X-ray fluo-rescence spectroscopy (XRF spectroscopy). Leaching by sulfuric acid leads to precipitation of lead sulphate and calcium sulphate, which remain in the residue. The level of some impurities in the solu-tion can be controlled.
This work focuses on the selective recovery of copper and indium by solvent extraction from the leaching solution. Preliminary synthetic solutions of copper, iron(III), zinc, indium and mixtures of them were used for the investigations. The influence of pH value, concentration of acidic extract-ants, extraction time, and phase ratio on the extraction of copper, iron(III), zinc, and indium were studied. The results of the selective extraction of copper in the presence of iron(III) will be present-ed.
  • Contribution to proceedings
    European Metallurgical Conference EMC2017, 25.-28.06.2017, Leipzig, Deutschland
    Proceedings of the EMC2017, Clausthal-Zellerfeld: GDMB Verlag GmbH, 978-3-940276-74-2, 1121-1132
  • Lecture (Conference)
    European Metallurgical Conference EMC 2017, 25.-28.06.2017, Leipzig, Deustchland

Publ.-Id: 26682 - Permalink