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Evaluation of leaching characteristic and kinetic study of lithium from lithium aluminum silicate glass-ceramics by NaOH

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Journal of Environmental Sciences 2021年第9期33卷 98-110页

作者： Dongseok Lee Sung-Ho Joo Dong Ju Shin Shun Myung Shin Resources Recovery Research Center Korea Institute of Geoscience and Mineral Resources(KIGAM)124 Gwahak-roYuseong-guDaejeon 34132Republic of Korea Department of Resources Recycling University of Science and Technology(UST)217Gajeong-roYuseong-guDaejeon 34113Republic of Korea

The behavior and mechanism of Li leaching from lithium aluminum silicate glass-ceramics which can be used as a secondary source of Li using aqueous NaOH solution was *** Li leaching efficiency is increased with increasing concentration of NaOH, specific surface area, and reaction *** leached under optimum conditions, 2 mol/L NaOH, 53 μm particle undersize, 1:10 solid/liquid ratio, 250 r/min stirring speed, 100℃ reaction temperature, 12 hr, the Li leaching efficiency was approximately 70%.However, when the leaching experiment was performed for 48 hr, the concentration of Li+ ions contained in the leach liquor decreased from 1160 to 236 mg/*** investigate the origin of this phenomenon, the obtained leach residue was analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray *** analyses show that zeolite was formed around the lithium aluminum silicate glass-ceramics, which affected the leaching of by adsorbing Li+ *** addition, using the shrinking-core model and the Arrhenius equation, the leaching reaction with NaOH was found to depends on the chemical reaction of the two reactants, with a higher than 41.84 kJ/mol of the activation energy.

关键词： lithium aluminum silicate glass-ceramics NaOH lithium Leaching

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