Add time:08/02/2019         Source:sciencedirect.com

In this paper, we studied the improved flotation behavior of PENTLANDITE (cas 12174-14-0) by ammoniacal copper(II) solution. The microflotation tests showed that ammoniacal copper(II) solution exhibited better activation effect for the flotation of pentlandite in alkaline pulping (pH 8–11) than CuSO4. Ultraviolet–visible spectroscopy analysis further comfirmed that ammoniacal copper(II) complexes were the dominant species in ammoniacal copper(II) solution, which was responsible for the superior activation effect. Systematic electrochemical studies including cyclic voltammetry (CV) measurements, polarization curves (Tafel plots) and electrochemical impedance spectroscopy (EIS) demonstrated that the electrochemical processes were improved and the hydrophilic hydroxide layers were converted to hydrophobic species on the surfaces of pentlandite in ammoniacal copper(II) solution.

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