Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+
| dc.contributor.author | Dzingai, Mathew | |
| dc.contributor.author | Manono, Malibongwe | |
| dc.contributor.author | Corin, Kirsten | |
| dc.date.accessioned | 2021-10-12T11:48:50Z | |
| dc.date.available | 2021-10-12T11:48:50Z | |
| dc.date.issued | 2020-11-19 | |
| dc.date.updated | 2020-11-26T14:08:24Z | |
| dc.description.abstract | Froth flotation is a multifaceted complex process which is water intensive. The use of recycled water as an alternative source of water to meet water demands of the process may introduce deleterious inorganic ions that affect the mineral surface, pulp chemistry, and reagent action, hence the need to establish whether threshold ion concentrations exist beyond which flotation performance will be adversely affected. This is of paramount importance in informing appropriate recycle streams and allowing simple, cost-effective water treatment methods to be applied. Here we report that increasing ionic strengths of synthetic plant water (SPW); 3, 5, and 10 SPW respectively, resulted in an increase in water recovery in the order 0.073 mol·dm<sup>−3</sup> (3 SPW) < 0.121 mol·dm<sup>−3</sup> (5 SPW) < 0.242 mol·dm<sup>−3</sup> (10 SPW), indicating an increase in froth stability as higher water recoveries are linked to increased froth stabilities. This behavior is linked to the action of inorganic electrolytes on bubble coalescence which is reported in literature. There was, however, no significant effect on the valuable mineral recovery. Spiking 3 SPW to 400 mg/L Ca<sup>2+</sup> resulted in higher copper and nickel grades compared to 3 SPW, 5 SPW, and 10 SPW and was deemed to be the Ca<sup>2+</sup> ion threshold concentration for this study since 3 SPW spiked with further Ca<sup>2+</sup> to a concentration of 800 mg/L resulted in a decrease in the concentrate grade. The spiking of 3 SPW with Mg<sup>2+</sup> resulted in higher copper and nickel grades compared to all other synthetic plant water conditions tested in this study. | en_US |
| dc.identifier | doi: 10.3390/min10111033 | |
| dc.identifier.apacitation | Dzingai, M., Manono, M., & Corin, K. (2020). Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+. <i>Minerals</i>, 10(11), http://hdl.handle.net/11427/35204 | en_ZA |
| dc.identifier.chicagocitation | Dzingai, Mathew, Malibongwe Manono, and Kirsten Corin "Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+." <i>Minerals</i> 10, 11. (2020) http://hdl.handle.net/11427/35204 | en_ZA |
| dc.identifier.citation | Dzingai, M., Manono, M. & Corin, K. 2020. Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+. <i>Minerals.</i> 10(11) http://hdl.handle.net/11427/35204 | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - Dzingai, Mathew AU - Manono, Malibongwe AU - Corin, Kirsten AB - Froth flotation is a multifaceted complex process which is water intensive. The use of recycled water as an alternative source of water to meet water demands of the process may introduce deleterious inorganic ions that affect the mineral surface, pulp chemistry, and reagent action, hence the need to establish whether threshold ion concentrations exist beyond which flotation performance will be adversely affected. This is of paramount importance in informing appropriate recycle streams and allowing simple, cost-effective water treatment methods to be applied. Here we report that increasing ionic strengths of synthetic plant water (SPW); 3, 5, and 10 SPW respectively, resulted in an increase in water recovery in the order 0.073 mol·dm<sup>−3</sup> (3 SPW) < 0.121 mol·dm<sup>−3</sup> (5 SPW) < 0.242 mol·dm<sup>−3</sup> (10 SPW), indicating an increase in froth stability as higher water recoveries are linked to increased froth stabilities. This behavior is linked to the action of inorganic electrolytes on bubble coalescence which is reported in literature. There was, however, no significant effect on the valuable mineral recovery. Spiking 3 SPW to 400 mg/L Ca<sup>2+</sup> resulted in higher copper and nickel grades compared to 3 SPW, 5 SPW, and 10 SPW and was deemed to be the Ca<sup>2+</sup> ion threshold concentration for this study since 3 SPW spiked with further Ca<sup>2+</sup> to a concentration of 800 mg/L resulted in a decrease in the concentrate grade. The spiking of 3 SPW with Mg<sup>2+</sup> resulted in higher copper and nickel grades compared to all other synthetic plant water conditions tested in this study. DA - 2020-11-19 DB - OpenUCT DP - University of Cape Town IS - 11 J1 - Minerals LK - https://open.uct.ac.za PY - 2020 T1 - Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+ TI - Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+ UR - http://hdl.handle.net/11427/35204 ER - | en_ZA |
| dc.identifier.uri | https://doi.org/10.3390/min10111033 | |
| dc.identifier.uri | http://hdl.handle.net/11427/35204 | |
| dc.identifier.vancouvercitation | Dzingai M, Manono M, Corin K. Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+. Minerals. 2020;10(11) http://hdl.handle.net/11427/35204. | en_ZA |
| dc.language.iso | en | en_US |
| dc.publisher.department | Chemical Engineering | |
| dc.publisher.faculty | Faculty of Engineering and the Built Environment | en_US |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
| dc.source | Minerals | en_US |
| dc.source.journalissue | 11 | en_US |
| dc.source.journalvolume | 10 | en_US |
| dc.source.uri | https://www.mdpi.com/journal/minerals | |
| dc.title | Simulating the Effect of Water Recirculation on Flotation through Ion-Spiking: Effect of Ca2+ and Mg2+ | en_US |
| dc.type | Journal Article | en_US |