| 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 / Rare Earth Minerals / Agglomeration |
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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. Dry high-intensity magnetic separation (DHIMS) of ground REE ore (-0.5 + .01 mm) could achieve the enrichment ratio of 2.8 with a TREO recovery of 70%.
2. Wet high-intensity magnetic separation (WHIMS) of ground REE ore (-106 + 75 μm) enriched TREO content by 5.5 times with a TREO recovery of ~80%.
3. Agglomeration of finely-ground bastnaesite (D50 = ~3 μm) using BHA increased the particle size to > 8 μm, which improved its recovery by WHIMS from 50% to 95%.
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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
As planned last year (FY2021), the mechanism of BHA-assisted agglomeration via adsorption tests, particle size analysis, zeta-potential measurements, Auger Electron Spectroscopy (AES), etc. as well as its effect on the improvement of magnetic separation efficiency were clearly investigated. In addition, the preliminary tests of magnetic separation using carrier (i.e., carrier magnetic separation) to improve the beneficiation of finely-ground REE ore were conducted.
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| 今後の研究の推進方策 |
In FY2022, BHA-assisted agglomeration followed by magnetic separation will be applied to real REE ore. Furthermore, it is planned to develop a sustainable and efficient flowsheet for upgrading low-grade REE ore via the combination of gravity separation, magnetic separation, and froth flotation.
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| 次年度使用額が生じた理由 |
The sufficient amount of the mineral specimen remained, so it was not purchased. In this year, it will be used for purchasing mineral specimen/consumables.
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