Affiliation:
1. N.V. Melnikov’s Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences, Kryukovsky Tupik 4, 111020 Moscow, Russia
Abstract
The parameters for efficient nitric acid leaching were experimentally determined, which ensured the recoveries of Zr and REEs from eudialyte concentrate up to 87.0%–91.7% and 76.0%–81.1%, respectively. The possibility was shown of intensifying the leaching process through preliminary energy treatments to ensure the intensive breakdown of mineral complexes and grains; as a result, the recovery of Zr and REEs increased by more than 10%. A process was developed for the selective recovery of up to 91.5% of zirconium and up to 71.2% of REEs in the form of carbonate compounds from the pregnant solution of nitric acid leaching by chemical precipitation as well as up to 81.1% REEs and up to 91.7% zirconium on hypercrosslinked polystyrene sorbents.
Funder
Russian Federation represented by the Ministry of Science and Higher Education of the Russian Federation
Subject
Geology,Geotechnical Engineering and Engineering Geology
Reference34 articles.
1. Vasilevskaya, D.V., and Saparov, S.M. (2022). Mineral Resource Complex in the Period of Uncertainty and New Challenges: Results, Trends, Prospects, Rusajns.
2. Abaka-Wood, G.B., Johnson, B., Addai-Mensah, J., and Skinner, W. (2022). Recovery of Rare Earth Elements Minerals in Complex Low-Grade Saprolite Ore by Froth Flotation. Minerals, 12.
3. Review of rare earth elements recovery from secondary resources for clean energy technologies: Grand opportunities to create wealth from waste;Jyothi;J. Clean. Prod.,2020
4. Rare earth metals from secondary sources: Review of potential supply from waste and byproducts;Gaustad;Resour. Conserv. Recycl.,2021
5. The concentration of rare earth elements from coal fly ash;Skinner;J. South. Afr. Inst. Min. Metall.,2022