Selective leaching of Mo from an off-grade gravity lead concentrate in Na2CO3 solution | Zendy

Z.-X. Liu | Zendy; Y.-T. Luo | Zendy; Wenbo Luo | Zendy; B.-X. Li | Zendy; Xianwen Wu | Zendy

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Selective leaching of Mo from an off-grade gravity lead concentrate in Na2CO3 solution

Author(s) -

Z.-X. Liu,

Y.-T. Luo,

Wenbo Luo,

B.-X. Li,

Xianwen Wu

Publication year - 2019

Publication title -

journal of mining and metallurgy section b metallurgy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.42

H-Index - 20

eISSN - 2217-7175

pISSN - 1450-5339

DOI - 10.2298/jmmb181128027l

Subject(s) - leaching (pedology) , scanning electron microscope , energy dispersive x ray spectroscopy , materials science , metallurgy , gravity separation , chemistry , analytical chemistry (journal) , environmental chemistry , geology , composite material , soil science , soil water

The selective leaching of Mo from an off-grade gravity lead concentrate was investigated in Na2CO3 solution using air as an oxidant. The leaching behaviors of Mo and Pb were predicted by the thermodynamic phase diagrams of Pb-Mo-C-H2O system. The oxidation mechanisms of those sulfides in the off-grade gravity lead concentrate were confirmed by the methods of X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS). The influence of operating factors on the leaching behaviors of Mo and Pb, including Na2CO3 concentration, liquid-to-solid ratio, temperature, and leaching time, were studied. Under these optimum leaching conditions (Na2CO3 2 M, leaching time 8 h, temperature 75?C, air-flow rate 2.0 m3/h and L/S ratio of 10/1 mL/g), the extraction of Mo and Pb was up to 97.70 and 0.73 %, respectively.

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