Mitigating the Adverse Effect of Salts on Gangue Recovery Using a Reflux Flotation Cell.
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| Title: | Mitigating the Adverse Effect of Salts on Gangue Recovery Using a Reflux Flotation Cell. |
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| Authors: | Wright, Brady1 (AUTHOR), Amani, Pouria1 (AUTHOR), Galvin, Kevin1 (AUTHOR), Firouzi, Mahshid1 (AUTHOR) Mahshid.Firouzi@newcastle.edu.au |
| Source: | Mineral Processing & Extractive Metallurgy Review. May2026, Vol. 47 Issue 3, p392-405. 14p. |
| Subject Terms: | *Salts, *Flotation, *Silicates, *Hydrodynamics, *Mineral processing, *Saline waters |
| Abstract: | Salts can negatively affect the froth flotation process by increasing the recovery of unwanted gangue particles. This study investigated the effect of salt on gangue recovery and evaluated the effectiveness of counter-current washing using unique system hydrodynamics distinct from conventional flotation cells, to mitigate this issue in saline water environments. Experiments were conducted using a Reflux flotation cell (RFC™) with fine hydrophilic silica particles (with a D90 of 68 μm) as a model for gangue particles at two solid concentrations of 3 wt.% and 12 wt.% and using sodium chloride 1 M reflecting the predominant salt composition in plant water. A single-mineral flotation approach was employed to isolate the effect of system hydrodynamics on gangue recovery, minimizing interference from ion-particle-collector interactions in saline environments. Key parameters such as yield and system hydrodynamics including bubble size and gas holdup were analyzed across a range of gas and wash water fluxes in the presence and absence of salt. In the absence of salt and counter-current washing, silica recovery (yield) reached 13.8%±0.21. This value increased by approximately 6.5% of the initial recovery when 1 M NaCl was introduced, attributed to salt-induced aggregation of fine silica particles through electrostatic double-layer screening. The application of counter-current washing in the presence of salt reduced silica recovery by 90%, resulting in a final recovery of less than 1.5%. This significant reduction is attributed to the formation of salt-induced agglomerates that are more effectively removed through washing. This trend was observed for both 12 wt.% solid concentration and the relatively dilute feed (3 wt.%). To investigate the potential hydrophobizing effect of salt on silica, surface wettability was measured with and without salt, showing minimal or no change in wettability. These findings highlight the potential of the RFC in mitigating the adverse effects of salts on gangue recovery, offering a promising approach for improving flotation performance in saline water. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 193015199 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mitigating the Adverse Effect of Salts on Gangue Recovery Using a Reflux Flotation Cell. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wright%2C+Brady%22">Wright, Brady</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Amani%2C+Pouria%22">Amani, Pouria</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Galvin%2C+Kevin%22">Galvin, Kevin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Firouzi%2C+Mahshid%22">Firouzi, Mahshid</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> Mahshid.Firouzi@newcastle.edu.au</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Mineral+Processing+%26+Extractive+Metallurgy+Review%22">Mineral Processing & Extractive Metallurgy Review</searchLink>. May2026, Vol. 47 Issue 3, p392-405. 14p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Salts%22">Salts</searchLink><br />*<searchLink fieldCode="DE" term="%22Flotation%22">Flotation</searchLink><br />*<searchLink fieldCode="DE" term="%22Silicates%22">Silicates</searchLink><br />*<searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Mineral+processing%22">Mineral processing</searchLink><br />*<searchLink fieldCode="DE" term="%22Saline+waters%22">Saline waters</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Salts can negatively affect the froth flotation process by increasing the recovery of unwanted gangue particles. This study investigated the effect of salt on gangue recovery and evaluated the effectiveness of counter-current washing using unique system hydrodynamics distinct from conventional flotation cells, to mitigate this issue in saline water environments. Experiments were conducted using a Reflux flotation cell (RFC™) with fine hydrophilic silica particles (with a D90 of 68 μm) as a model for gangue particles at two solid concentrations of 3 wt.% and 12 wt.% and using sodium chloride 1 M reflecting the predominant salt composition in plant water. A single-mineral flotation approach was employed to isolate the effect of system hydrodynamics on gangue recovery, minimizing interference from ion-particle-collector interactions in saline environments. Key parameters such as yield and system hydrodynamics including bubble size and gas holdup were analyzed across a range of gas and wash water fluxes in the presence and absence of salt. In the absence of salt and counter-current washing, silica recovery (yield) reached 13.8%±0.21. This value increased by approximately 6.5% of the initial recovery when 1 M NaCl was introduced, attributed to salt-induced aggregation of fine silica particles through electrostatic double-layer screening. The application of counter-current washing in the presence of salt reduced silica recovery by 90%, resulting in a final recovery of less than 1.5%. This significant reduction is attributed to the formation of salt-induced agglomerates that are more effectively removed through washing. This trend was observed for both 12 wt.% solid concentration and the relatively dilute feed (3 wt.%). To investigate the potential hydrophobizing effect of salt on silica, surface wettability was measured with and without salt, showing minimal or no change in wettability. These findings highlight the potential of the RFC in mitigating the adverse effects of salts on gangue recovery, offering a promising approach for improving flotation performance in saline water. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/08827508.2025.2502857 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 392 Subjects: – SubjectFull: Salts Type: general – SubjectFull: Flotation Type: general – SubjectFull: Silicates Type: general – SubjectFull: Hydrodynamics Type: general – SubjectFull: Mineral processing Type: general – SubjectFull: Saline waters Type: general Titles: – TitleFull: Mitigating the Adverse Effect of Salts on Gangue Recovery Using a Reflux Flotation Cell. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wright, Brady – PersonEntity: Name: NameFull: Amani, Pouria – PersonEntity: Name: NameFull: Galvin, Kevin – PersonEntity: Name: NameFull: Firouzi, Mahshid IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 08827508 Numbering: – Type: volume Value: 47 – Type: issue Value: 3 Titles: – TitleFull: Mineral Processing & Extractive Metallurgy Review Type: main |
| ResultId | 1 |
