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Minerals 2018, 8(1), 16;

Influence of the Interaction between Sphalerite and Pyrite on the Copper Activation of Sphalerite

Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Author to whom correspondence should be addressed.
Received: 14 December 2017 / Revised: 8 January 2018 / Accepted: 10 January 2018 / Published: 12 January 2018
(This article belongs to the Special Issue Flotation Chemistry)
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In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron spectroscopy (XPS), and electrochemical measurement. The micro-flotation test results showed that the recovery and flotation rate of sphalerite with copper sulphate as activator and butyl xanthate as collector were significantly decreased with the increasing content of pyrite in pulp. Cu2+ adsorption results indicated that the adsorption of Cu2+ on the sphalerite surface were decreased when pyrite was present in the pulp. XPS surface analysis demonstrated that the proportion of Cu+ species increased in the activation products on the sphalerite surface, but the total atomic concentration of Cu atom was decreased. Linear voltammetry measurement suggested that the current density of Cu+ species oxidizing to Cu2+ species was increased when sphalerite was electrically contacted with pyrite, which confirmed the increased proportion of Cu+ species on Cu-activation sphalerite surface when contacting with pyrite. These results indicated that there is not only a competitive adsorption for cupric ions (Cu2+), but the galvanic interaction between sphalerite and pyrite also has a significant influence on the copper activation of sphalerite. View Full-Text
Keywords: Cu activation; sphalerite; interaction between minerals; pyrite Cu activation; sphalerite; interaction between minerals; pyrite

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Yang, B.; Tong, X.; Lan, Z.; Cui, Y.; Xie, X. Influence of the Interaction between Sphalerite and Pyrite on the Copper Activation of Sphalerite. Minerals 2018, 8, 16.

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