A new collector for bastnaesite flotation - modified hydroxamic acid (MOHA) has been developed through several years laboratory research. The experimental results of flotation of pure bastnaesite mineral and rare earth ores, and the application experience in flotation plants showed that MOHA is an efficient collector for bastnaesite flotation.
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Microflotation experiments were conducted on bastnaesite ore with a head grade of about 7.7 % rare earth oxide. Collectors 2, 5, and 8 showed a selectivity for bastnaesite and …
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2.2. Reagents. Ethyl thiocarbamate was used as the collector during the flotation of the sulfide minerals. Sodium silicate with a modulus of 2.8 was used as the depressant, and the rare earth collectors used, H205 and LF, were obtained from the Baotou Steel Rare Earth Group High-Tech Co. Ltd.
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Samples were obtained from the Thor lake deposit. Several micro-flotation tests were performed on samples in order to understand the reaction between reagents (collectors, and depressants) and rare earth minerals during flotation. Prior to flotation the feed sample was prepared in order to remove magnetics and de-slime (Fig. 1).
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Given the indispensability and immense value of rare earth elements for scientific and technological advancements in the 21st century, extracting high-quality rare earth resources from nature has become a global priority. Bastnäsite-(Ce) is one of the known rare earth minerals with high rare earth content and wide distribution, which …
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DOI: 10.1016/j.cis.2023.103029. Given the indispensability and immense value of rare earth elements for scientific and technological advancements in the 21st century, extracting high-quality rare earth resources from nature has become a global priority. Bastnäsite- (Ce) is one of the known rare earth minerals with high rare earth c ….
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Handbook of Flotation Reagents: Chemistry, Theory and Practice Flotation of Sulfide Ores, Elsevier, Amsterdam (2007), pp. 5-41. View PDF View article Google Scholar [21] L. Xia, B. Hart, S. Chelgani, K. Douglas, Hydroxamate collectors for rare earth mineral flotation, in: 53rd Annual Conference of Metallurgists Vancouver, Canada, 2014.
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2.3. Flotation. A laboratory 0.5 L flotation cell (CMT Flotation Tester FT-1000) was used in the flotation experiments.The 80 g wet ground sample was diluted to 0.4 L slurry with tap water in the cell and the agitator was set to 1,200 rpm.The initial pH of the slurry was measured and the pH was adjusted to a desired conditioning pH. The …
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The enriched concentrates usually contain 50 wt%–60 wt% REO, which can reduce the energy consumption and dosage of chemical reagents in metallurgical processes. The beneficiation methods of RE ores mainly include gravity separation, magnetic separation, electrostatic separation and froth flotation.
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Fluorite flotation separation from bastnaesite via an eco-friendly polymer as a depressant and insight into its mechanism of adsorption. Article. Feb 2023. J MOL LIQ. Da Shi. Wenbo Li. Yuexin Han.
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Alkaline rock-type rare-earth (RE) ores have significant utilisation value. However, the exploitation of such resources faces great challenges owing to the complex …
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The rare- earth mineral discovery was made in April 1949, and subsequent mapping of FLOTATION SEPARATION OF RARE-EARTH ORES 3 the area resulted in the discovery of the bastnaesite-bearing Sulfide Queen carbonate ore body in 1950. The Sulfide Queen ore body is about 800 m long, 170 m wide and 100 m deep, indicative of …
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Flotation Collectors. Simply said; a Flotation Collectors is a chemical used to make the surface of minerals, which is metallic, hydrophobic or in layman's term 'afraid of water' or 'water hating' as others like to say. This chemical used will behaved, in a way, as a wax would when you applied it to your car. After wax (or hydrophobic ...
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Potential ionic-liquid (IL) collector for flotation of rare earth bearing minerals. ... [22], [23], are widely used in monazite and bastnäsite flotation in conjunction with reagents such as sodium carbonate, sodium silicate and sodium fluorosilicate added as regulators, depressants and modifiers [8], [11]. As an example, this collector proved ...
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Abstract. Montana Tech has been engaged in fundamental research on the processing of critical materials for more than a decade. Efforts include examining novel …
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Abstract. Montana Tech has been engaged in fundamental research on the processing of critical materials for more than a decade. Efforts include examining novel reagents for the flotation of Rare Earth Minerals (REMs). For this paper, research results on a collector, salicyl hydroxamic acid (SHA), are presented.
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Electron donating ability and hydrophobicity are of the two aspects related to flotation performance of a collector. To solve the insufficient collecting power of benzohydroxamic acid (BHA) in tungsten ores flotation, its derivatives p-alkoxyl benzohydroxamic acids (AOBHAs) were designed as the advanced wolframite …
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Bastnaesite, a rare-earth fluocarbonate, was separated from associated calcite and barite gangue minerals in the Mountain Pass, CA rare-earth ore beneficiation plant by froth flotation using fatty ...
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During this time, a variety of collectors for the flotation of rare earths bastnasite have been investigated including: fatty acids, various hydroxamates, dicarboxylic acids, and phosphoric acids (Jordens et al. 2014). ... (2013). Design and development of novel flotation reagents for the beneficiation of Mountain Pass rare-earth ore. Minerals ...
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This paper reviews rare earth minerals (monazite and xenotime) separation by flotation. A wide range of monazite and xenotime flotation test results are summarized including: reasons of variation in the point of zero charges on these minerals, the effects of various flotation conditions on zeta potential of monazite and xenotime, interactions of …
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Flotation Researches of Bastnaesite, Monazite, Xenotime: A Review. Moonchul Jung Kyoungkeun Yoo. Materials Science, Chemistry. 2020. A literature review was conducted to summarize the types of minerals containing rare earth elements, their chemical composition, surface characteristics, adsorption mechanism with various …
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This is typically achieved via the adsorption of selective organic reagents (collectors, depressants, etc.) ... the difficulty in rare earth flotation lies, i.e. both the desired and …
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The flotation of rare earth element (REE) bearing minerals is a topic which has been dominated in ... oxhydryl collectors such as hydroxamates (reagents with a functional group consisting of oxygen atoms) has been explained by Nagaraj (1988) to be due to differences in the available electron density at the functional group. The available ...
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For example, at Mountain Pass, California, USA, and Mount Weld mine in Australia, flotation is employed to enrich rare earth oxides (REO) from 3%-15% to 40%-60% in concentrates [9,17].
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The design and development of selective flotation collectors has been the key to the remarkable success of flotation in beneficiating complex, difficult-to-process ores. Sustained research efforts in the field over the past hundred years have led to delineating the scientific basis of selective mineral flotation in terms of the crystal chemistry and the …
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J. Goode N. Verbaan M. Johnson G. Hill V. Lawson T. Deng. Materials Science, Chemistry. 2014. Flotation of rare earths is complicated by the number of mineral classes that carry rare earth elements, including carbonates, phosphates, and silicates that often co‐occur within the same deposit.….
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The flotation reagents play a vital role in the development of rare earth beneficiation technology, and hydroxamate collectors have been successfully applied to the flotation of rare earth ...
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The experimental results of flotation of pure bastnaesite mineral and rare earth ores, and the application experience in flotation plants showed that MOHA is an efficient collector for bastnaesite ...
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A critical review of the literature on rare-earth mineral flotation suggests the possibility of designing a more selective reagent combination for the beneficiation of Mountain Pass rare-earth ore ...
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Alkaline rock-type rare-earth (RE) ores have significant utilisation value. However, the exploitation of such resources faces great challenges owing to the complex mineral and element assemblages. Composite collectors exhibit excellent performances, which may provide solutions to the flotation problem of alkaline rock-type RE ores. …
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