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Improvement of flotation and suppression of pyrite oxidation using phosphate-enhanced galvanic microencapsulation (GME) in a ball mill with steel ball media
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| Title: | Improvement of flotation and suppression of pyrite oxidation using phosphate-enhanced galvanic microencapsulation (GME) in a ball mill with steel ball media |
| Authors: | Seng, Sophea Browse this author | | Tabelin, Carlito Baltazar Browse this author | | Makino, Yuta Browse this author | | Chea, Monyneath Browse this author | | Phengsaart, Theerayut Browse this author | | Park, Ilhwan Browse this author | | Hiroyoshi, Naoki Browse this author →KAKEN DB | | Ito, Mayumi Browse this author →KAKEN DB |
| Keywords: | Galvanic interactions | | Galvanic microencapsulation | | Ball mill | | Flotation | | Pyrite | | Passivation |
| Issue Date: | Nov-2019 |
| Publisher: | Elsevier |
| Journal Title: | Minerals engineering |
| Volume: | 143 |
| Start Page: | 105931 |
| Publisher DOI: | 10.1016/j.mineng.2019.105931 |
| Abstract: | Acid mine drainage (AMD) is one of the biggest and most challenging environmental concerns of the mining and mineral processing industries. In our previous study, we reported a new and promising approach to passivate sulfide minerals and limit AMD formation called galvanic microencapsulation (GME), a technique that forms protective coatings via galvanic interactions between sulfide minerals (e.g., pyrite) and metal powders (e.g., zero-valent iron and aluminum). In this paper, the possible application of GME in a ball mill with steel ball media and phosphate to suppress pyrite floatability during coal cleaning and limit pyrite oxidation after disposal is proposed. The results showed that adding phosphate and maintaining sufficient oxygen supply during GME treatment in the ball mill passivated pyrite and suppressed its oxidation via the formation of protective iron phosphate coatings. Moreover, the iron phosphate coatings on pyrite made the mineral more hydrophilic, which improved the separation efficiency during coal flotation. |
| Rights: | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/83116 |
| 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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Submitter: 伊藤 真由美
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