Journal of Siberian Federal University. Chemistry / Features of Direct Alkaline Processing of Rare-Metal Ores of the Tomtor Deposit

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2023 16 (4)
Authors
Kuzmin, Vladimir I.; Kuzmin, Dmitry V.; Epov, Oleg A.; Bondarenko, Galina N.
Contact information
Kuzmin, Vladimir I. : Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation; Kuzmin, Dmitry V. : Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation; ; Epov, Oleg A.: Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation; Bondarenko, Galina N. : Institute of Chemistry and Chemical Technology SB RAS Federal Research Center “Krasnoyarsk Scientific Center of the SB RAS” Krasnoyarsk, Russian Federation
Keywords
rare earth metals; Tomtor deposit; leaching; precipitation
Abstract

Direct alkaline decomposition of rare-metal Tomtor ore under various conditions has been studied. It has been established that associated minerals (aluminophosphates, iron carbonates and sulfides) are decomposed by sodium hydroxide solutions and significantly reduce the activity of the circulating alkaline solution. Pre-treatment of ore with dilute spent alkaline solutions makes it possible to decompose aluminophosphates with their partial conversion into soluble forms and aluminosilicates stable in alkaline solutions. It is shown that significant fluctuations in the release of rare- earth metals into solution during subsequent acid leaching of cakes from alkaline opening are associated with partial oxidation of cerium by atmospheric oxygen

Pages
584–594
EDN
QFZISM
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/152363