, Volume 60, Issue 1–2, pp 198–203 | Cite as

Extraction of Rare-Earth Metals During the Systematic Processing of Diaspore-Boehmite Bauxites


An integrated technology is proposed for processing diaspore-boehmite bauxites and extracting their useful components. It is established that sintering bauxite with a caustic alkali increases the quantities of rare-earth metals that are recovered. Experiments showed that the sintering of bauxite with a caustic alkali must be done with no more than 10–15% moisture in the charge at the optimum temperature of 200°C. Leaching of the sinter cake with water or a dilute aluminate solution forms high-iron red mud with low concentrations of alkali and alkaline-earth metals. Leaching the mud with a dilute inorganic acid makes it possible to extract up to 90% of the rare-earth metals, including scandium oxide.


bauxite sintering caustic alkali red mud rare-earth metals scandium oxide 


This research was performed with financial support provided in accordance with Resolution No. 211 of the Russian Federal Government (Contract No. 02.A03.21.0006).


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • I. V. Loginova
    • 1
  • A. A. Shoppert
    • 1
  • L. I. Chaikin
    • 1
  1. 1.Ural Federal UniversityEkaterinburgRussia

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