Fundamental and flotation techniques assessing the effect of water quality on bubble-particle attachment of chalcopyrite and galena

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-06-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
Series
Minerals Engineering, Volume 167
Abstract
Bubble-particle attachment has been studied in the most fundamental way from as early as 1934 by bringing a bubble into contact with a flat mineral surface and since then, techniques measuring this interaction have advanced. Water quality within flotation will impact the bubble particle attachment and as more operations recycle their water on site, an understanding of this process becomes vital. This study uses an Automated Contact Time Apparatus (ACTA) to assess the effect of water quality on bubble-particle attachment of selected sulfide minerals; galena and chalcopyrite, from a fundamental perspective. Classical microflotation tests are complemented with collector adsorption and mineral potential under degrading water quality to validate the ACTA and gain an understanding of the effect of water quality on bubble-particle attachment as well as subsequent flotation. This investigation showed that the results from the ACTA qualitatively showed similar trends as that of the classical microflotation technique for measuring floatability, however the quantitively these methods showed very different results. Due to the dynamic nature of the microflotation technique it may be assumed that plant recovery will resemble the results from this technique closer than that of the ACTA. Furthermore, this investigation showed an increase in zeta potential of both minerals as the concentration of inorganic electrolytes in the water increased. It can thus be speculated that the increase in bubble-particle attachment with increasing ionic strength of synthetic plant water may be attributed to electrical double layer compression and particle agglomeration.
Description
| openaire: EC/H2020/730480/EU//ITERAMS Funding Information: This work is financed by the National Research Foundation of South Africa (NRF) [Grant number 103641] and this project has received funding from the European Union H2020 programme under grant agreement No 730480. Any opinion, finding and conclusion or recommendation expressed in this material is that of the authors and the NRF does not accept any liability in this regard. Further the financial and technical contributions from the South African Minerals to Metals Research Institute (SAMMRI) is also acknowledged. Publisher Copyright: © 2021 The Author(s) Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords
Bubble-particle attachment, Chalcopyrite, Froth flotation, Galena, Ions, Water quality
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Citation
October, L L, Manono, M S, Wiese, J G, Schreithofer, N & Corin, K C 2021, ' Fundamental and flotation techniques assessing the effect of water quality on bubble-particle attachment of chalcopyrite and galena ', Minerals Engineering, vol. 167, 106880 . https://doi.org/10.1016/j.mineng.2021.106880