Magnetic properties of REE fluorcarbonate minerals and their implications for minerals processing

Al-Ali, Safaa; Wall, Frances; Sheridan, Richard; Pickles, Jonathan; Pascoe, R.D.

doi:10.1016/j.mineng.2018.11.042

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…Bastnäsite, synchysite, and monazite were selectively recovered, although to a lesser extent than the other three REMs. The results correspond well to the magnetic susceptibilities that have been previously reported [8,23,25]. The liberation and association characteristics of zircon, HREMs, LREMs, and iron oxides in the WHIMS products are illustrated in Figure 23.…”

Section: Wet High-intensity Magnetic Separatorsupporting

confidence: 88%

“…Although this demonstrates REMs can be concentrated, the recovery (relative to the WHIMS feed) of HREMs and LREMs is only 51% and 38%, respectively. Apart from synchysite, which has been reported as a diamagnetic mineral [23], all other REMs are paramagnetic. Therefore, those that report to the non-magnetic fraction may be insufficiently liberated or too fine (relative to their magnetic susceptibility) to be recovered with the employed WHIMS conditions (matrix type, field strength, and/or field gradient).…”

Section: Wet High-intensity Magnetic Separatormentioning

confidence: 98%

“…The results demonstrate that iron oxides can be removed (80% recovery (relative to the table concentrate)); however, losses of zircon and REMs to the magnetic fraction are significant (~20% (relative to the table concentrate)). These minerals are reported as paramagnetic or diamagnetic [8,[23][24][25][26][27], and therefore they would not be expected to report to the magnetic fraction following separation with the Wet Magnetic Test Chute. Thus, they are recovered as a result of being entrapped by magnetic material (iron oxides), being The results demonstrate that iron oxides can be removed (80% recovery (relative to the table concentrate)); however, losses of zircon and REMs to the magnetic fraction are significant (~20% (relative to the table concentrate)).…”

Section: Wet Magnetic Test Chutementioning

confidence: 99%

“…Thus, they are recovered as a result of being entrapped by magnetic material (iron oxides), being The results demonstrate that iron oxides can be removed (80% recovery (relative to the table concentrate)); however, losses of zircon and REMs to the magnetic fraction are significant (~20% (relative to the table concentrate)). These minerals are reported as paramagnetic or diamagnetic [8,[23][24][25][26][27], and therefore they would not be expected to report to the magnetic fraction following separation with the Wet Magnetic Test Chute. Thus, they are recovered as a result of being entrapped by magnetic material (iron oxides), being associated in particles with highly magnetic material, or they possess some highly paramagnetic or ferromagnetic properties.…”

Section: Wet Magnetic Test Chutementioning

confidence: 99%

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Physical Separations for Rare-Earth Beneficiation of the Nechalacho Deposit

Marion,

Paris,

Grammatikopoulos

et al. 2023

Minerals

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The rare-earth elements (REEs) are strategic metals which are indispensable to the development of modern defence systems, electronic applications, and green technologies. The growing economic and strategic importance of these sectors, coupled with uncertainty in the global supply, has led to the development of many new deposits around the world. Many of these deposits, such as the Nechalacho deposit, are complex and contain multiple rare-earth element-bearing minerals (REMs) for which there is limited processing knowledge. This study explores a physical-separations-based flowsheet to beneficiate the Nechalacho deposit, which employs a spiral concentrator to preconcentrate the ore at a relatively coarse particle size (d80 = 120 μm), before further size reduction (d100 = 53 μm) and separation using a Mozley laboratory shaking table and two stages (low- and high-intensity) of magnetic separation. QEMSCAN was used to understand the effectiveness of each stage of separation and provide recommendations to improve the process. Although optimisation would be required, the results demonstrate that the physical-separations-based flowsheet could be an effective method of beneficiation.

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Section: Wet High-intensity Magnetic Separatorsupporting

confidence: 88%

Section: Wet High-intensity Magnetic Separatormentioning

confidence: 98%