The Effect of Tetrathionate Ions on the Surface Chemistry and Flotation Response of Selected sulphide Minerals

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-12-08
Major/Subject
Mcode
Degree programme
Language
en
Pages
14
Series
Mineral Processing and Extractive Metallurgy Review
Abstract
This study investigated the impact of tetrathionate ions on selected sulfide mineral surfaces and their flotation response to tetrathionates using X-ray photoelectron spectroscopy (XPS), zeta potential and batch flotation studies and linking the results to previously reported electrochemistry, FTIR and microflotation studies. XPS revealed that tetrathionates have the propensity to oxidize minerals, changing the chemical composition of the mineral surface. This surface alteration renders the sulfide minerals hydrophilic through sulphoxy and hydroxy entities reducing collector adsorption as noted in FTIR and mixed potential studies. Zeta potentials showed little specific adsorption of tetrathionates on the sulfides except at moderately high concentrations, i.e., 1000 mg/L. Batch flotation showed that tetrathionates in solution depressed sulfide minerals, particularly galena, reducing its recovery to the concentrates in support of earlier microflotation results.
Description
| openaire: EC/H2020/730480/EU//ITERAMS This work was supported by the European Union H2020 program under Grant Agreement number Horizon 2020 Framework Programme 730480.
Keywords
Mineral oxidation, zeta potential, recovery, tetrathionates, batch flotation, rest potentials, XANTHATE ADSORPTION, GALENA SURFACES, FROTH STABILITY, ETHYL XANTHATE, ORE FLOTATION, PROCESS WATER, CHALCOPYRITE, XPS, PYRITE, OXIDATION
Other note
Citation
Mhonde , N , Johansson , L-S , Corin , K & Schreithofer , N 2021 , ' The Effect of Tetrathionate Ions on the Surface Chemistry and Flotation Response of Selected sulphide Minerals ' , Mineral Processing and Extractive Metallurgy Review . https://doi.org/10.1080/08827508.2021.1998044