Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/3069
Título: Recovery of lithium carbonate by acid digestion and hydrometallurgical processing from mechanically activated lepidolite
Autor: Vieceli, N.
Nogueira, C. A.
Pereira, Manuel F. C.
Durão, F.
Guimarães, C.
Margarido, F.
Palavras-chave: Leaching
Lithium-ion batteries
Lepidolite
Hydrometallurgy
Battery recycling
Valuable metals
Data: 2018
Editora: Elsevier
Citação: Vieceli, N.; Nogueira, C.A.; Pereira, Manuel F.C...[et.al.]. - Recovery of lithium carbonate by acid digestion and hydrometallurgical processing from mechanically activated lepidolite. In: Hydrometallurgy, 2018, Vol. 175, p. 1-10
Resumo: ABSTRACT: Lithium extraction from hard-rock ores has regained importance due to the increased demand for this metal to supply the growing battery market. Therefore, several studies have been focused on the lithium extraction from ores, however, leaching and purification steps are sparsely studied. Thus, the objective of this study was to evaluate the main factors affecting the water leaching step and the subsequent purification operations for lithium recovery from a lepidolite concentrate, which was processed by mechanical activation and sulphuric acid digestion. In the leaching step, among the variables studied, only one, the leaching temperature, showed a significant effect on the lithium extraction, taking into account the range of values tested. Thus, the recommended operating value for the leaching time and the L/S ratio is the minimum, while for the leaching temperature is 50°C. After optimizing the leaching operation, the purification of the leachate, by neutralization, was thoroughly performed by efficient removal of impurities (Fe, Al, Mn and Ca), allowing to obtain lithium carbonate as final product, as well as other relevant by-products, such as rubidium and potassium alums.
Peer review: yes
URI: http://hdl.handle.net/10400.9/3069
ISSN: 0304-386X
Versão do Editor: http://dx.doi.org/10.1016/j.hydromet.2017.10.022
Aparece nas colecções:ME - Artigos em revistas internacionais

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