|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Alternative Lixiviant for Copper Leaching from Chalcopyrite Concentrate
||Junmo Ahn, Jiajia Wu, Jaeheon Lee
|On-Site Speaker (Planned)
Chalcopyrite leaching by conventional sulfuric acid with ferric as an oxidant is well known to be hindered by surface passivation. In this study, different chemical lixiviants were used to investigate the effects on overall copper extraction. Baseline sulfuric acid leaching with ferric ion as an oxidant was carried out and sulfurous acid with ferric ion was also performed. MSA (Methanesulfonic Acid) with ferric ion or hydrogen peroxide as an oxidant was also studied for copper leaching from chalcopyrite. Copper extraction by 30 g/l MSA was higher at 0.6% H2O2 (94%) compared to 0.3% (67%) and 1.5% (75%). Maximum copper extraction of 23% was observed at 21oC using MSA and almost 100% copper extraction was achieved at 75oC by MSA. The activation energy of the chalcopyrite leaching by MSA was calculated to be 39.9 kJ/mol and the kinetic is chemical reaction controlled.
||Planned: At-meeting proceedings