Selective solvometallurgical leaching of lead and zinc from jarosite residues from the zinc industry

The relatively new branch in extractive metallurgy called solvometallurgy was investigated for selective leaching of Pb and Zn from iron-rich jarosite residues, which are typically landfilled. After screening of several lixiviants, the ionic liquids [A336][Cl] and [C101][Cl], equilibrated with HCl, leached the most Pb and Zn of the ionic liquids investigated. When the ionic liquids were equilibrated with relatively lower HCl concentrations, the dissolution of Fe decreased drastically and, thereby, the selectivity for Pb and Zn improved. [A336][Cl] equilibrated with 0.5 M HCl leached 62 wt% Pb, 27 wt% Zn and 7 wt% Fe, while [C101][Cl] equilibrated with 0.5 M HCl leached 73 wt% Pb, 31 wt% Zn and 10 wt% Fe.

Publication year:2018

Accessibility:Open