Rare earths (La, Ce, Nd) and rare metals (Sn, Nb, W) as by-products of kaolin production – Part 2: Gravity processing of micaceous residues

Dehaine, Quentin; Filippov, L.O.; Joussemet, Robert

doi:10.1016/j.mineng.2016.10.018

Cited by 22 publications

(17 citation statements)

References 18 publications

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“…Therefore, the second stage of gravity separation was a shaking table. Some other works have done a gravity separation as first stage, followed by a shaking table of the concentrate [1,16]. Moreover, the recirculation of middlings was once again evaluated.…”

Section: Characterization Of the Fine Aggregate Wastementioning

confidence: 99%

“…), and zircon do not have effective substitutes. Hence, the exploration and exploitation of new mine resources for extracting these minerals are essential [1]. Besides, some new technology (electronic devices, electric vehicles, wind turbines, light alloys) needs some very specific metals without which this technology would have not developed as much as it has been.…”

Section: Introductionmentioning

confidence: 99%

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Concentration and Recovery of Valuable Heavy Minerals from Dredged Fine Aggregate Waste

Moscoso-Pinto

Kim

2021

Minerals

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Inside the finest fractions of aggregates, usually wasted by ready mix concrete companies, valuable heavy minerals content is substantial. The concentration and recovery of valuable heavy minerals contained in dredged fine aggregates waste, located in Pyeongtaek South Korea, were investigated to develop a process that can recover and concentrate most of each heavy mineral. The raw material contains ilmenite, magnetite, monazite, and zircon. A gravity separation, recirculating the middlings recovered ilmenite, magnetite, monazite, and zircon with 44.05%, 36.90%, 53.76%, and 69.7% respectively. Nevertheless, a magnetic separation followed by gravity separation of the non-magnetic fraction further improved the recovery of ilmenite, magnetite, monazite, and zircon to 86.96%, 85.09%, 91.06%, and 90.82% respectively. This concentrate was separated at different magnetic intensities. Magnetite was concentrated at 0.05 T, resulting in a recovery of 23.4% and grade of 95.1 wt%. Ilmenite was at 0.4 T, with a recovery of 55.2% and grade of 84.2 wt%. Monazite was at 0.9 T, with a recovery of 59.3% and rare earth oxide content of 45.2%, the non-magnetic fraction has a high zircon content, the recovery was 70.6% and grade of 91.8 wt%.

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Section: Characterization Of the Fine Aggregate Wastementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Concentration and Recovery of Valuable Heavy Minerals from Dredged Fine Aggregate Waste

Moscoso-Pinto

Kim

2021

Minerals

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“…The sieves opening have been selected based on the washability of the materials (Dehaine et al, 2017), in order to improve the efficiency of the gravity concentration, but also to be able to use data from the GT53MR180 core sample products s to characterise the feed properties of the gravity route with the objective of establishing process performance prediction models for core sample data.…”

Section: Process Samples For Metal Accounting and For Gravity Concentration Testworkmentioning

confidence: 99%

“…The influence of the LREE grade in the feed on spiral concentration efficiency has been tested with a 5-turn MKIIA Reichert spiral (Mineral Deposit Limited, Australia) using the setup described in Dehaine et al (2017) in scavenging configuration. Operating condition are set at 0.12 m 3 .h -1 wash water flowrate and 15% solid pulp density to favour recovery (Dehaine et al, 2017), concentrate splitters positions are adjusted visually for the first test but remains fixed for all the others. Spiral concentrates are then processed using a No.13 Wilfley laboratory shaking table (Holman-Wilfley, United-Kingdom) following the flowsheet presented in Figure 4Figure 4.…”

Section: Pilot-scale Gravity Concentration Testworkmentioning

confidence: 99%

“…Total amounts of REE locked in these residues are also very large and may secure an independent source of REE as well as shielding resource-poor countries from export quotas and price fluctuations (Binnemans et al, 2015). Industrial mineral wastes, such as those from the kaolin industry in Cornwall, UK, have proven to be a potential source for REE, Sn and Nb recovery (Dehaine et al, 2017;Dehaine and Filippov, 2015a;Filippov et al, 2016;Scott et al, 1998). The kaolin deposits are formed by weathering and alteration of granite rocks.…”

Section: Introductionmentioning

confidence: 99%

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Rare-metal granites as a potential source of critical metals: A geometallurgical case study

Dehaine

Filippov

Glass

et al. 2019

Ore Geology Reviews

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Because of their low grades in critical metals such as Light Rare Earth Elements (LREE) or Sn, rare-metal granites are not considered as economic for metal recovery but, when altered, they are often exploited for their industrial minerals. The St Austell rare-metal granite is well known for its world-class kaolin deposits which formed as a result of the extensive weathering and alteration of the underlying granite. The St Austell granite body is composed of several granite components, each having its own accessory minerals assemblage. As a result of the kaolinisation process, some metal-bearing accessory minerals of the granite, such as monazite (LREE) or cassiterite (Sn), are partially liberated from the gangue which allow their pre-concentration in the micaceous residue which is considered as a potential source for critical metals recovery. A geometallurgical approach is fundamental for this unconventional 'resource', not only because of its nature but also because the target metals must be considered as by-products. Similarities with other similar rare-metal granites suggest that topaz granite is the most prospective for disseminated magmatic Sn-Nb-Ta-REE mineralization. However, comparison of the potentiality of 3 granite types i.e. biotite, topaz and tourmaline granites suggest that biotite granites is actually the most prospective due to higher degree of kaolinisation of the biotite granite which favour pre-concentration of its accessory mineral in the micaceous residue. In order to develop a geometallurgical framework for extraction of kaolin and metals from the selected granite component, a field sampling campaign is performed. Core samples are processed in the laboratory using a characterisation program that mimics the full-scale kaolin refining route. Two main products are recovered through this program, viz. GT53MR180 (-180+53 µm) and R5P5 (-5 µm), which correspond to a fine micaceous residue and a fine kaolin product respectively. These products are both analysed routinely for major and minor trace elements by XRF and yields are recorded to indicate process performance. A selected number of GT53MR180 samples are also being characterised in terms of particle size by laser light scattering, geochemistry by ICP-MS, and mineralogy by QEMSCAN ® . Comparison of characterisation results of GT53MR180 samples and corresponding industrial residue samples shows a good correlation, suggesting that sample analyses are representative for the in-situ deposit and the processing behaviour. Monazite is found to be either fully liberated or fully locked from one sample to the other. Next, pilot-scale gravity concentration tests are performed on micaceous residue samples. Characterisation of the processing products shows that monazite lost in the tailings is mostly locked within tourmaline or micas and is fine grained. Then, predictive regression models for spiral separation performance in terms of recovery, product grade and enrichment as a function of the feed grade are developed for GT53MR180 LREE grade data. Finally,...

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Zircon concentrate analysis for sixteen rare earth elements by the complex of nuclear analytical methods

Silachyov

2023

J Radioanal Nucl Chem

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Rare earths (La, Ce, Nd) and rare metals (Sn, Nb, W) as by-products of kaolin production – Part 2: Gravity processing of micaceous residues

Cited by 22 publications

References 18 publications

Concentration and Recovery of Valuable Heavy Minerals from Dredged Fine Aggregate Waste

Concentration and Recovery of Valuable Heavy Minerals from Dredged Fine Aggregate Waste

Rare-metal granites as a potential source of critical metals: A geometallurgical case study

Zircon concentrate analysis for sixteen rare earth elements by the complex of nuclear analytical methods

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