A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery
The surface oxidation of chalcopyrite is one of the most important factors affecting its flotation performance. In this study, a critical oxidation degree is proposed to define “slight” and “significant” oxidation in terms of surface species and chalcopyrite flotation recovery. Slight oxidation enha...
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| Format: | Article |
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MDPI AG
2022-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/7/888 |
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| author | Xu Yang Yubiao Li Wen Chen Wanqing Duan Qing Xiao Tingting Jiang |
| author_facet | Xu Yang Yubiao Li Wen Chen Wanqing Duan Qing Xiao Tingting Jiang |
| author_sort | Xu Yang |
| collection | DOAJ |
| description | The surface oxidation of chalcopyrite is one of the most important factors affecting its flotation performance. In this study, a critical oxidation degree is proposed to define “slight” and “significant” oxidation in terms of surface species and chalcopyrite flotation recovery. Slight oxidation enhanced chalcopyrite hydrophobicity, but significant oxidation reduced its recovery apparently. Microthermokinetic measurements indicated that the apparent activation energy (<i>E</i><sub>a</sub>) of chalcopyrite oxidation was reduced from around 173 kJ·mol<sup>−1</sup> to 163 kJ·mol<sup>−1</sup> when the reaction changed from slight oxidation to significant oxidation when applying H<sub>2</sub>O<sub>2</sub>. The surface oxidation degree was defined as the ratio of hydrophilic species to hydrophobic species. The highest recovery (94.8%) and contact angle (93°) were achieved at a concentration of 0.1 vol.% H<sub>2</sub>O<sub>2</sub>, with the lowest oxidation degree of 0.388 being observed. The oxidation degree was correlated to the flotation recovery, with a quantitative relationship (<i>y</i> = −298.81<i>x</i> + 213.05, <i>y</i> and <i>x</i> represent flotation recovery and oxidation degree, respectively, 0.388 ≤ <i>x</i> ≤ 0.618) being established, thereby giving a guideline to better manage chalcopyrite flotation by controlling its surface oxidation and SBX adsorption on chalcopyrite surfaces. |
| first_indexed | 2024-03-09T10:14:41Z |
| format | Article |
| id | doaj.art-b88a3f7206a44514a22f5dfdc6385fbb |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T10:14:41Z |
| publishDate | 2022-07-01 |
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| record_format | Article |
| series | Minerals |
| spelling | doaj.art-b88a3f7206a44514a22f5dfdc6385fbb2023-12-01T22:29:11ZengMDPI AGMinerals2075-163X2022-07-0112788810.3390/min12070888A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation RecoveryXu Yang0Yubiao Li1Wen Chen2Wanqing Duan3Qing Xiao4Tingting Jiang5Hubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan University of Technology, Wuhan 430070, ChinaHubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan University of Technology, Wuhan 430070, ChinaSchool 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, ChinaSchool 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, ChinaThe surface oxidation of chalcopyrite is one of the most important factors affecting its flotation performance. In this study, a critical oxidation degree is proposed to define “slight” and “significant” oxidation in terms of surface species and chalcopyrite flotation recovery. Slight oxidation enhanced chalcopyrite hydrophobicity, but significant oxidation reduced its recovery apparently. Microthermokinetic measurements indicated that the apparent activation energy (<i>E</i><sub>a</sub>) of chalcopyrite oxidation was reduced from around 173 kJ·mol<sup>−1</sup> to 163 kJ·mol<sup>−1</sup> when the reaction changed from slight oxidation to significant oxidation when applying H<sub>2</sub>O<sub>2</sub>. The surface oxidation degree was defined as the ratio of hydrophilic species to hydrophobic species. The highest recovery (94.8%) and contact angle (93°) were achieved at a concentration of 0.1 vol.% H<sub>2</sub>O<sub>2</sub>, with the lowest oxidation degree of 0.388 being observed. The oxidation degree was correlated to the flotation recovery, with a quantitative relationship (<i>y</i> = −298.81<i>x</i> + 213.05, <i>y</i> and <i>x</i> represent flotation recovery and oxidation degree, respectively, 0.388 ≤ <i>x</i> ≤ 0.618) being established, thereby giving a guideline to better manage chalcopyrite flotation by controlling its surface oxidation and SBX adsorption on chalcopyrite surfaces.https://www.mdpi.com/2075-163X/12/7/888chalcopyriteflotationoxidation degreesurface species |
| spellingShingle | Xu Yang Yubiao Li Wen Chen Wanqing Duan Qing Xiao Tingting Jiang A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery Minerals chalcopyrite flotation oxidation degree surface species |
| title | A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery |
| title_full | A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery |
| title_fullStr | A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery |
| title_full_unstemmed | A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery |
| title_short | A Quantitative Relationship between Oxidation Index and Chalcopyrite Flotation Recovery |
| title_sort | quantitative relationship between oxidation index and chalcopyrite flotation recovery |
| topic | chalcopyrite flotation oxidation degree surface species |
| url | https://www.mdpi.com/2075-163X/12/7/888 |
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