Mechanical and hydrometallurgical processes in HCl media for the recycling of valuable metals from Li-ion battery waste
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2019-03-01
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Language
en
Pages
10
257-266
257-266
Series
RESOURCES CONSERVATION AND RECYCLING, Volume 142
Abstract
The present work offers a study on the engineering implications of the recovery of valuable fractions from industrially collected lithium battery (LIB) waste by mechanical and hydrometallurgical processes in HCl media. Direct leaching of LIB waste provides a possibility for Li extraction, a component that is lost into the slag fraction in the state-of-art high temperature processes. The challenges arising from the heterogeneous composition of industrial battery waste are highlighted, and the behavior of main metals present such as Co, Cu, Li, Mn, Ni and Al is observed. It is shown that mechanical separation processes can form fractions rich on Cu and Al, although subsequent refining stages are necessary. Regarding direct leaching, fast kinetics were found, as complete Li dissolution can be achieved in ca. 120 min. Furthermore, high solid/liquid ratio (>1/10) is required to increase metal value concentrations, resulting in a viscous slurry due to the graphite, plastics and other undissolved materials, which challenges filtration and washing of leach residue. Neutralization of the product liquid solution (PLS) result in co-precipitation of valuable battery metals along with Fe and Al. The highest value of LIBs lies in Co, subjected for solvent extraction (SX) or direct precipitation to make an intermediate product. SX can provide selectivity whereas Na 2 CO 3 precipitation provides a fast route for Co-Ni bulk production. Li 2 CO 3 precipitation from the remaining PLS is possible as zabuyelite - however, due to heterogeneity of the battery waste, the recovery of Li 2 CO 3 with battery-grade purity remains a difficult task to be achieved by direct precipitation route.Description
Keywords
Recycling, Characterisation, Characterization, Hydrochloric acid leaching, Solvent extraction, Lithium carbonate precipitation, ELECTRODE MATERIALS, PRICE, CO, LITHIUM-ION, RECOVERY, PRECIPITATION, TECHNOLOGIES, VALUES, SEPARATION, COBALT
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Citation
Porvali, A, Aaltonen, M, Ojanen, S, Velazquez Martinez, O, Eronen, E, Liu, F, Wilson, B P, Serna Guerrero, R & Lundström, M 2019, ' Mechanical and hydrometallurgical processes in HCl media for the recycling of valuable metals from Li-ion battery waste ', RESOURCES CONSERVATION AND RECYCLING, vol. 142, pp. 257-266 . https://doi.org/10.1016/j.resconrec.2018.11.023