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Flotation Separation of Chalcopyrite and Molybdenite Assisted by Microencapsulation Using Ferrous and Phosphate Ions: Part I. Selective Coating Formation
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| Title: | Flotation Separation of Chalcopyrite and Molybdenite Assisted by Microencapsulation Using Ferrous and Phosphate Ions: Part I. Selective Coating Formation |
| Authors: | Park, Ilhwan Browse this author →KAKEN DB | | Hong, Seunggwan Browse this author | | Jeon, Sanghee Browse this author →KAKEN DB | | Ito, Mayumi Browse this author →KAKEN DB | | Hiroyoshi, Naoki Browse this author →KAKEN DB |
| Keywords: | porphyry deposits | | chalcopyrite | | molybdenite | | flotation | | microencapsulation | | FePO4 coating |
| Issue Date: | 13-Dec-2020 |
| Publisher: | MDPI |
| Journal Title: | Metals |
| Volume: | 10 |
| Issue: | 12 |
| Start Page: | 1667 |
| Publisher DOI: | 10.3390/met10121667 |
| Abstract: | Porphyry Cu-Mo deposits, which are the most important sources of copper and molybdenum, are typically processed by flotation. In order to separate Cu and Mo minerals (mostly chalcopyrite and molybdenite), the strategy of depressing chalcopyrite while floating molybdenite has been widely adopted by using chalcopyrite depressants, such as NaHS, Na2S, and Nokes reagent. However, these depressants are potentially toxic due to their possibility to emit H2S gas. Thus, this study aims at developing a new concept for selectively depressing chalcopyrite via microencapsulation while using Fe2+ and PO43- forming (FePO4)-P-(III) coating. The cyclic voltammetry results indicated that Fe2+ can be oxidized to Fe3+ on the chalcopyrite surface, but not on the molybdenite surface, which arises from their different electrical properties. As a result of microencapsulation treatment using 1 mmol/L Fe2+ and 1 mmol/L PO43-, chalcopyrite was much more coated with FePO4 than molybdenite, which indicated that selective depression of chalcopyrite by the microencapsulation technique is highly achievable. |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/80441 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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