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http://dx.doi.org/10.6111/JKCGCT.2021.31.1.016

A study on the fabrication of high purity lithium carbonate by recrystallization of low grade lithium carbonate  

Kim, Boram (Advanced Materials and Processing Center, Institute for Advanced Engineering (IAE))
Kim, Dae-Weon (Advanced Materials and Processing Center, Institute for Advanced Engineering (IAE))
Hwang, Sung-Ok (GM-Tech Co., LTD.)
Jung, Soo-Hoon (GM-Tech Co., LTD.)
Yang, Dae-Hoon (GM-Tech Co., LTD.)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.31, no.1, 2021 , pp. 16-23 More about this Journal
Abstract
Lithium carbonate recovered from the waste solution generated during the lithium secondary battery manufacturing process contains heavy metals such as cobalt, nickel, and manganese. In this study, the recrystallization of lithium carbonate was performed to remove heavy metals contained in the powder and to increase the purity of lithium carbonate. First, the leaching efficiency of lithium carbonate according to pH in the aqueous hydrochloric acid solution was examined, and the effect on the recrystallization of lithium carbonate according to the equivalent and concentration of sodium carbonate was confirmed. As the equivalent and concentration of sodium carbonate increased, the recovery rate of lithium carbonate improved. And the SEM image showed that the crystal shape was changed depending on the reaction conditions with sodium carbonate. Finally, the high purity lithium carbonate of 99.9% or more was recovered by washing with water.
Keywords
Lithium recovery; Lithium carbonate; Recrystallization; Secondary battery; High purity;
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