Journal article
Leaching of lepidolite and recovery of lithium hydroxide from purified alkaline pressure leach liquor by phosphate precipitation and lime addition
Hydrometallurgy, Vol.201, Article 105538
2021
Abstract
This study investigated the pressure leaching of lithium and other valuable metals from lepidolite using NaOH and Ca(OH)2. The findings showed that NaOH concentration, temperature, and stirring rate are the most significant process parameters. The addition of Ca(OH)2 facilitates the leaching of lithium and minimizes the concentration of silicate and fluoride in the leach liquor by forming solid phases identified as Ca3Al2Si3O12, CaF2 and NaCaHSiO4, with a loss of about 7% NaOH. The leaching efficiencies after 2 h were 94% Li, 98% K, 96% Rb, and 90% Cs under the most suitable conditions (250 °C, 320 g/L NaOH, liquid-to-solid ratio of 10, 300 rpm stirring speed, lime addition of 0.3 g/g). Precipitation of lithium as Li3PO4 by adding phosphoric acid and subsequent conversion of Li3PO4 to LiOH using Ca(OH)2 recovered 83% of lithium as LiOH allowing recycling the rest along with residual remnant NaOH for leaching.
Details
- Title
- Leaching of lepidolite and recovery of lithium hydroxide from purified alkaline pressure leach liquor by phosphate precipitation and lime addition
- Authors/Creators
- J. Mulwanda (Author/Creator) - Murdoch UniversityG. Senanayake (Author/Creator) - Murdoch UniversityH. Oskierski (Author/Creator) - Murdoch UniversityM. Altarawneh (Author/Creator) - Murdoch UniversityB.Z. Dlugogorski (Author/Creator) - Charles Darwin University
- Publication Details
- Hydrometallurgy, Vol.201, Article 105538
- Publisher
- Elsevier BV
- Identifiers
- 991005540210707891
- Copyright
- © 2020 Published by Elsevier B.V.
- Murdoch Affiliation
- School of Mathematics, Statistics, Chemistry and Physics
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.62 Electrochemistry
- 2.62.138 Lithium-Ion Battery
- Web Of Science research areas
- Metallurgy & Metallurgical Engineering
- ESI research areas
- Materials Science