|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||The Study of Copper Leaching from Conichalcite and Chalcopyrite Using Alternative Lixiviants
||Junmo Ahn, Isabel Fay Barton, Doyun Shin, Jaeheon Lee
|On-Site Speaker (Planned)
Chalcopyrite (CuFeS2) is one of the most abundant and refractory primary copper sulfide minerals. Conichalcite is a calcium-copper-arsenate (Ca(Cu(AsO4)(OH)) and less known to process metallurgists. It is also known to be refractory to leaching by sulfuric acid. Conichalcite is a major copper ore at the Mike deposit in Carlin, NV, USA and Tsumeb in Namibia, but occurs as an accessory in the supergene zones of Morenci and other porphyry deposits.
In this study the effectiveness of alternative lixiviants (sulfurous acid, glycine, and other organic acids) on leaching copper from conichalcite and chalcopyrite was investigated, with sulfuric acid as baseline. Over 90% copper extraction from chalcopyrite was observed and 85% copper extraction was obtained from conichalcite containing samples. Copper leaching kinetics were investigated under different experimental parameters to optimize the metal extraction. QEMSCAN mineralogical study was also performed on both feed and residue samples.
||Planned: None Selected