Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment
The flotation separation of chalcopyrite from pyrite has attracted increasing attention due to the consumption of vast water resources and depressants. This study proposed the seawater oxidation pretreatment for non-depressant flotation separation of chalcopyrite from pyrite, as an effective and env...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | International Journal of Mining Science and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268623001180 |
| _version_ | 1797582928444653568 |
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| author | Wanqing Li Yubiao Li Zhonghong Wang Xu Yang Wen Chen |
| author_facet | Wanqing Li Yubiao Li Zhonghong Wang Xu Yang Wen Chen |
| author_sort | Wanqing Li |
| collection | DOAJ |
| description | The flotation separation of chalcopyrite from pyrite has attracted increasing attention due to the consumption of vast water resources and depressants. This study proposed the seawater oxidation pretreatment for non-depressant flotation separation of chalcopyrite from pyrite, as an effective and environmentally friendly strategy. Without the addition of depressants, seawater oxidation for 3 d effectively depressed pyrite flotation, with the highest recovery difference greater than 70% and a selectivity index greater than 6 between chalcopyrite and pyrite. The surface investigation showed that pyrite surface was more readily oxidized to form hydrophilic Fe oxidants/oxyhydroxides, as compared to that of chalcopyrite. Further UV-visible spectrophotometer and Fourier transform infrared spectrum (FTIR) results indicated that xanthate was less adsorbed onto the treated pyrite surface, resulting in un-floatable particles. Chalcopyrite surface was changed slightly due to seawater oxidation, thereby insignificantly affecting its flotation. The coordination theory was further used to reveal the combination mechanisms between xanthate and pyrite or chalcopyrite. This study therefore provides a promising strategy to effectively separate chalcopyrite from pyrite, especially in the freshwater-deficient area. |
| first_indexed | 2024-03-10T23:29:34Z |
| format | Article |
| id | doaj.art-41a1d02234bc4a46b9e125b5636fcd36 |
| institution | Directory Open Access Journal |
| issn | 2095-2686 |
| language | English |
| last_indexed | 2024-03-10T23:29:34Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Mining Science and Technology |
| spelling | doaj.art-41a1d02234bc4a46b9e125b5636fcd362023-11-19T04:34:35ZengElsevierInternational Journal of Mining Science and Technology2095-26862023-10-01331012891300Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatmentWanqing Li0Yubiao Li1Zhonghong Wang2Xu Yang3Wen Chen4Hubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan University of Technology, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, ChinaHubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan University of Technology, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China; Corresponding authors.Hubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan University of Technology, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, ChinaHubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan University of Technology, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, ChinaChangsha Research Institute of Mining and Metallurgy Co. Ltd., Changsha 410012, China; Corresponding authors.The flotation separation of chalcopyrite from pyrite has attracted increasing attention due to the consumption of vast water resources and depressants. This study proposed the seawater oxidation pretreatment for non-depressant flotation separation of chalcopyrite from pyrite, as an effective and environmentally friendly strategy. Without the addition of depressants, seawater oxidation for 3 d effectively depressed pyrite flotation, with the highest recovery difference greater than 70% and a selectivity index greater than 6 between chalcopyrite and pyrite. The surface investigation showed that pyrite surface was more readily oxidized to form hydrophilic Fe oxidants/oxyhydroxides, as compared to that of chalcopyrite. Further UV-visible spectrophotometer and Fourier transform infrared spectrum (FTIR) results indicated that xanthate was less adsorbed onto the treated pyrite surface, resulting in un-floatable particles. Chalcopyrite surface was changed slightly due to seawater oxidation, thereby insignificantly affecting its flotation. The coordination theory was further used to reveal the combination mechanisms between xanthate and pyrite or chalcopyrite. This study therefore provides a promising strategy to effectively separate chalcopyrite from pyrite, especially in the freshwater-deficient area.http://www.sciencedirect.com/science/article/pii/S2095268623001180Seawater oxidationChalcopyritePyriteNon-depressant flotationThe coordination theory |
| spellingShingle | Wanqing Li Yubiao Li Zhonghong Wang Xu Yang Wen Chen Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment International Journal of Mining Science and Technology Seawater oxidation Chalcopyrite Pyrite Non-depressant flotation The coordination theory |
| title | Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment |
| title_full | Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment |
| title_fullStr | Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment |
| title_full_unstemmed | Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment |
| title_short | Selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment |
| title_sort | selective flotation of chalcopyrite from pyrite via seawater oxidation pretreatment |
| topic | Seawater oxidation Chalcopyrite Pyrite Non-depressant flotation The coordination theory |
| url | http://www.sciencedirect.com/science/article/pii/S2095268623001180 |
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