Optimization of an innovative approach involving mechanical activation and acid digestion for the extraction of lithium from lepidolite
- 167 Downloads
The recovery of lithium from hard rock minerals has received increased attention given the high demand for this element. Therefore, this study optimized an innovative process, which does not require a high-temperature calcination step, for lithium extraction from lepidolite. Mechanical activation and acid digestion were suggested as crucial process parameters, and experimental design and response-surface methodology were applied to model and optimize the proposed lithium extraction process. The promoting effect of amorphization and the formation of lithium sulfate hydrate on lithium extraction yield were assessed. Several factor combinations led to extraction yields that exceeded 90%, indicating that the proposed process is an effective approach for lithium recovery.
Keywordslepidolite lithium mechanical activation acid digestion optimization extraction
Unable to display preview. Download preview PDF.
The author N. Vieceli acknowledges the doctorate grant ref. 9244/13-1 supplied by CAPES Foundation, Ministry of Education of Brazil. The authors are also very grateful to Felmica Minerais Industriais, S.A. for having kindly provided the lepidolite ore used in the tests.
- J. Kondás, and J. Jandová, Lithium extraction from zinnwaldite wastes after gravity dressing of Sn-W ores, Acta Metall. Slovaca, 12(2006), p. 197.Google Scholar
- J. Jandová, H.N. Vu, T. Belková, P. Dvorák, and J. Kondás, Obtaining Li2CO3 from zinnwaldite wastes, Ceram. Silik., 53(2009), No. 2, p. 108.Google Scholar
- TEMA Machinery Ltd., Laboratory Disc Mill [2016-08-01]. http://www.tema.co.uk/products/tema-mill/laboratory-disc-mill.Google Scholar
- D.C. Montgomery, Design and Analysis of Experiments, 8th Ed., John Wiley & Sons, Inc., USA, New Jersey, 2012, p. 752.Google Scholar
- Met-Chem Canada Inc., Feasibility Study on the Whabouchi Lithium Deposit and Hydromet Plant, NI 43-101 Technical Report, Prepared for Nemaska Lithium Inc, 2014.Google Scholar
- P. Baláž, Mechanochemistry in Nanoscience and Minerals Engineering, 1st Ed., Springer-Verlag Berlin Heidelberg, Berlin, 2008, p. 413.Google Scholar