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Separation of samarium, europium and erbium by oleic acid solution at stoichiometric rate of extractant
Published in Vladimir Litvinenko, Innovation-Based Development of the Mineral Resources Sector: Challenges and Prospects, 2018
O.V. Cheremisina, T.E. Litvinova, D.S. Lutskiy
Main part of reach rare earth ores is situated in internal Mongolia region in China. In Europe, rare earth elements represented by apatite or eudialyte ores. The largest deposits of eudialyte ores is situated at the territory of Lovozersky district (Kola Peninsula). Eudialyte is very special mineral, which contains REM cerium and yttrium REMs in relation 60/40%. This relation is very unusual. Usually rare earth minerals contain either cerium or yttrium group of lanthanides. Eudialyte easily decomposed by acid. So it's possible to use solvent extraction methods to extract REMs from eudialyte concentrate acid leaching solution [Masloboyev et al. 1991, Zakharov et al. 2005, Dibrov et al. 1996].
Rare earths of the Murmansk Region, NW Russia: minerals, extraction technologies and value
Published in Applied Earth Science, 2023
Andrey O. Kalashnikov, Nataly G. Konopleva, Konstantin P. Danilin
Eudialyte group minerals contain Zr, REE and thorium (Table 2). Eudialyte is not yet a widely used raw material for the extraction of REE, but it is considered as one of the most promising minerals for this process. REE concentrations in eudialyte are relatively low, but technologies for the enrichment of this ore by magnetic and flotation methods already exist (Stark et al. 2017; Silin et al. 2022). There are several methods of processing eudialyte concentrate to obtain REE: various acid technology and its varieties (Lebedev 2003; Balinski et al. 2019b) and hydrometallurgical processes (Davris et al. 2017; Voßenkaul et al. 2017; Balinski et al. 2019a, 2020). The first groups of methods are suitable for Murmansk region since they allow the utilisation of sulphuric acid of copper-nickel factories of the Murmansk region.
The Effect of Energy Impacts on the Acid Leaching of Eudialyte Concentrate
Published in Mineral Processing and Extractive Metallurgy Review, 2021
V.A. Chanturiya, V.G. Minenko, A.L. Samusev, E.L. Chanturia, E.V. Koporulina, I. Bunin, M.V. Ryazantseva
A promising source of rare and rare earth metals in Russia is the eudialyte ore of the Lovozero deposit (Kola Peninsula). In eudialyte lujavrites, eudialyte is a rock-forming mineral and is a complex sodium, calcium, and zirconium silicate (Na15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2). The eudialyte ore reserves of the Lovozero Mountain Range are considered almost unlimited (zirconium oxide 300 million tons, rare earth oxides 60–70 million tons). Therefore it may become the main source of a number of rare (zirconium, hafnium, niobium, tantalum, etc.) and rare earth metals, primarily the most valuable of these – yttrium, cerium, europium, etc. (Forrester et al. 2014; Kuleshevich and Dmitrieva 2019; Rastsvetaeva 2007; Samonov and Melentyev 2011; Savel’eva 2011).