| 研究課題/領域番号 |
20K15214
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| 研究機関 | 北海道大学 |
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研究代表者 |
PARK ILHWAN 北海道大学, 工学研究院, 助教 (80844753)
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| 研究期間 (年度) |
2020-04-01 – 2023-03-31
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| キーワード | Magnetic Separation / Agglomeration / Rare Earth Minerals |
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| 研究実績の概要 |
This research aims at developing advanced magnetic separation techniques for the recovery of rare earth element (REE)-bearing minerals from Mongolian ore deposits. The most important achievements of this study are summarized as follows:
1. The major REE-bearing minerals in the ore obtained from Mongolian deposit were Bastnaesite, Columbite, Pyrochlore, Synchysite, and Zircon, most of which have paramagnetic properties.
2. After magnetic separation of the ground ores, the contents of total rare earth oxide (TREO) in magnetic products were increased as particle size decreased due to the improvement of liberation degree.
3. Wet magnetic separation could not recover finely-ground REE-bearing minerals (< 0.01 mm).
4. Oil agglomeration increased the apparent particle size of fine Bastnaesite.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
In FY2020, the characterization of ores used in this study were done, and the effects of particle size on the efficiency of magnetic separation were clearly understood. Moreover, the possibility of oil agglomeration of finely-ground Bastnaesite (D50 = ~2.9 μm) was confirmed.
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| 今後の研究の推進方策 |
In FY2021, the mechanisms of oil agglomeration of various REE-bearing minerals present in the ores will be elucidated via adsorption tests, particle size analysis, zeta potential measurements, etc. Also, the effects of oil agglomeration on magnetic separation will be investigated.
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| 次年度使用額が生じた理由 |
Based on the ore characterizations done in FY2020, mineral specimens will be purchased for model experiments. Moreover, the rest of budget will be used for buying consumables, publishing research papers, and attending conferences.
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