Electrolysis Oxidation of Chalcopyrite and Molybdenite for Selective Flotation
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- Miki Hajime
- Department of Earth Resources Engineering, Kyushu University
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- Matsuoka Hidekazu
- Department of Earth Resources Engineering, Kyushu University
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- Hirajima Tsuyoshi
- Department of Earth Resources Engineering, Kyushu University
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- Suyantara Gde Pandhe Wisnu
- Department of Earth Resources Engineering, Kyushu University
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- Sasaki Keiko
- Department of Earth Resources Engineering, Kyushu University
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<p>Electrolysis oxidation of chalcopyrite and molybdenite was investigated, via various electrochemical methods, with the aim of realizing selective flotation of these minerals. Result of potential polarization indicated that oxidation via electrolysis affected only the chalcopyrite surface, owing mainly to the difference in conductivity of these minerals. Also measurements of contact angle after electrolysis indicated that contact angle of chalcopyrite selectively decreased whereas that of molybdenite did not decrease drastically. XPS analyses after electrolysis indicated that chalcopyrite peak decreased whereas iron oxyhydroxide (goethite) and iron sulfate increased, it suggests that these oxidation products covered on the surface of chalcopyrite. On the other hand, molybdenite peak is similar after electrolysis except for molybdenum oxide/oxygen with molybdenite can be seen for oxygen peak. From these results and general knowledge that sulfide hydrophobicity and sulfate/oxyhydroxide hydrophilicity, it can be explained that with electrolysis oxidation, hydrophilic oxihydroxide and sulfate covered on the surface of hydrophobic chalcopyrite then chalcopyrite surface became hydrophilic. On the other hand, molybdenite surface keep hydrophobic since its difficulty of oxidation and it is difficult to stay molybdenum oxide on the surface due to its soluble property. These results revealed that chalcopyrite was selectively oxidized and, hence, selective flotation of chalcopyrite and molybdenite was possible. This electrolysis oxidation methods were compared with those governing other oxidation treatments.</p>
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 58 (5), 761-767, 2017
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679231293824
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- NII論文ID
- 130005611974
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 028137869
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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