Inorganic Chemicals Industry >
Research progress of recovery of strategic metal lithium from fly ash
Received date: 2022-08-09
Online published: 2023-01-17
With the rapid development of lithium battery industry，the dependence of lithium raw materials on imports in China has increased year by year.Recycling of lithium from fly ash can not only alleviate the serious shortage of lithium supply in China，but also effectively solve the problem of fly ash polluting the environment.On the basis of analyzing and comparing the composition and characteristics of lithium ore，salt lake brine and fly ash，the technology of recovering lithium from fly ash was reviewed from two aspects：leaching and extraction.The lithium leaching process was affected by aluminum leaching process from fly ash，and it was relatively mature at present，mainly including acid leaching and alkaline leaching.The lithium extraction technology was affected by lithium leaching process.The leaching solution from acid leaching process had many impurities，so lithium extraction process was relatively complex，and currently mainly including solvent extraction，calcination-leaching and adsorption method.The leaching solution from alkaline leaching process had few impurities，so lithium extraction process was easy，currently mainly including adsorption method.Because the components of fly ash leaching solution and salt lake brine were similar，it was the main research direction of lithium recovery from fly ash in the future to learn from the experience of lithium extraction from salt lake brine and develop lithium extraction technology suitable for fly ash leaching solution.
Key words： fly ash; lithium; leaching; extraction
Darui LIU , Lijun XU , Shichun LI , Kun CAO , Ya TU , Wenqing LI , Qingliang LIU . Research progress of recovery of strategic metal lithium from fly ash[J]. Inorganic Chemicals Industry, 2023 , 55(1) : 56 -63 . DOI: 10.19964/j.issn.1006-4990.2022-0471
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