Effect of electrochemical interactions among sulphide minerals and grinding medium on the flotation of sphalerite and galena
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2018, Minerals EngineeringCitation Excerpt :The formation of hydrophilic OH− ion and reduced potential consequently depress the sulphide minerals flotation (Martin et al., 1989; Cheng and Iwasaki, 1992). Rao and Natarajan (1990) suggested that there is a special distribution of the iron species among the minerals present in a slurry depending on the relative electrochemical activity of the minerals. The iron distribution is more favoured on more noble minerals relative to the active minerals.
Role of manganese dioxide in the recovery of oxide–sulphide zinc ore
2018, Journal of Hazardous MaterialsCitation Excerpt :From previous reports on binding energy values of sphalerite [18,19], lower S2p BE value at ∼161.20 eV is identified as S2−, and higher BE value at ∼163.10 eV is attributed to Sn2− (where n ≥ 2) for polysulphide. The S2p band at 162.2 eV can be assumed being composed of sulphide (S2−) and disulphide (S22−), and S2p band at 169 eV is corresponding to sulphate [20]. The detail XPS spectrum of S2p gives further evidence of galena, phalerite and pyrite from the view of bond valence.