2014 Fiscal Year Final Research Report
Development of advanced mineral processing technology for treatment of impurity ore by flotation and leaching combination process
| Project/Area Number |
24360370
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Earth system and resources enginnering
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| Research Institution | Akita University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HAGA Kazutoshi 秋田大学, 大学院工学資源学研究科, 助教 (10588461)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 浮選 / アルカリ浸出 / ミネラルプロセシング / 硫砒銅鉱 / 四面銅鉱 / 不純物 / ヒ素 / アンチモン |
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| Outline of Final Research Achievements |
This study investigated the development of advanced mineral processing such as flotation - leaching - precipitation for removing impurities such as arsenic (As) and antimony (Sb) from copper ore with tennantite, tetrahedratite and enargite. In flotation, 95 % of enargite (Cu3AsS4) was recovered from the ore at pH4. On the other hand, recovery of chalcopyrite reached 20%. It is possible to separate enargite and chalcopyrite by controlling hydrophobicity of mineral surface and stability of froth that forms in the flotation cell by the addition of flotation reagents. In alkaline leaching, 90% of As and Sb were dissolved from the ore in NaOH - NaHS media under the optimum leaching conditions. In precipitation, more than 90 % of As and Sb were removed as a precipitate from the solution by adding sulphur, cooling and conditioning. Accordingly, valuable treatment conditions for removing impurities such as arsenic (As) and antimony (Sb) from dirty copper ore were developed.
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| Free Research Field |
資源処理工学・リサイクル工学
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