Optimization of an innovative approach involving mechanical activation and acid digestion for the extraction of lithium from lepidolite
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第1期
论文作者：Nathália Vieceli Manuel F.C.Pereira Fernando O.Dur?o Carlos Guimar?es Fernanda Margarido
文章页码：11 - 19
摘 要：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.
Nathália Vieceli1，Manuel F.C.Pereira3，Fernando O.Dur?o3，Carlos Guimar?es3，Fernanda Margarido1
1. Center for Innovation,Technology and Policy Research–IN+,Instituto Superior Técnico,University of Lisbon3. CERENA–Centro de Recursos Naturais e Ambiente,DECivil,Instituto Superior Técnico,University of Lisbon
摘 要：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.
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