Kinetics of Ferric Ion Reduction on Chalcopyrite and its Influence on Leaching up to 150 °C

The reduction kinetics of ferric ion on chalcopyrite in the quaternary H2SO4-Fe2(SO4)3-FeSO4-H2O system were systematically studied by cathodic potentiodynamic polarization (0.5 mV/s) through a wide range of solution compositions and temperatures (25–150 °C). Results reveal that all of the pseudo-polarization plots exhibit reproducible well-defined linear Tafel regions and thus the temperature dependence of various kinetic parameters, such as...