3308 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
leaching kinetics associated with the leaching of chalcopy-
rite, a sulfidic mineral, with carbon (Nakazawa 2018 Gao,
Yue, Gao, and Li 2020 Winand 1991).
The improvement of chalcopyrite leaching, accord-
ing to these investigations, requires direct contact between
chalcopyrite and carbon black. Moreover, the redox
potential was lowered below 600 mV and the Fe3+/Fe2+
concentration ratio was decreased in the early phases of
leaching by the addition of carbon. Other research works
concluded that the redox potential seems to have a signifi-
cant role in regulating how much chalcopyrite leaches and
suggested a critical potential below which chalcopyrite can
dissolve by forming intermediate species (Gao, Yue, Gao,
and Li 2020 Nakazawa 2018).
Figure 7. The individual effect plots of the input parameters for Ni recovery (%):(a) H
2 SO
4 concentration (b) catalyst dosage
(c) leaching temperature (d) leaching time (e) catalyst type
(a) (b)
(c) (d)
(e)
leaching kinetics associated with the leaching of chalcopy-
rite, a sulfidic mineral, with carbon (Nakazawa 2018 Gao,
Yue, Gao, and Li 2020 Winand 1991).
The improvement of chalcopyrite leaching, accord-
ing to these investigations, requires direct contact between
chalcopyrite and carbon black. Moreover, the redox
potential was lowered below 600 mV and the Fe3+/Fe2+
concentration ratio was decreased in the early phases of
leaching by the addition of carbon. Other research works
concluded that the redox potential seems to have a signifi-
cant role in regulating how much chalcopyrite leaches and
suggested a critical potential below which chalcopyrite can
dissolve by forming intermediate species (Gao, Yue, Gao,
and Li 2020 Nakazawa 2018).
Figure 7. The individual effect plots of the input parameters for Ni recovery (%):(a) H
2 SO
4 concentration (b) catalyst dosage
(c) leaching temperature (d) leaching time (e) catalyst type
(a) (b)
(c) (d)
(e)