Research on Potassium Removal Process Technology of Battery Grade Lithium Salt
Lithium pyroxene,lithium mica,and salt lake brine are the main raw materials for the production of battery grade lithium salts.Due to their structural characteristics and production processes,they all contain a certain amount of potassium impurities,and battery grade lithium salt products have strict requirements for the content of potassium impurities.The effect of stirring,centrifugal washing,and recrystallization on potassium removal from products was studied through battery grade Li2CO3 potassium removal experiments and battery grade single water LiOH potassium removal experiments.The results showed that stirring,centrifugal washing,and recrystallization can effectively remove potassium impurities from battery grade Li2CO3 and battery grade LiOH.After refining,the potassium content in the product can be reduced to below 0.001%,meeting the potassium content requirements of the current standards for battery grade Li2CO3 and battery grade LiOH products.
lithium saltlithium carbonatelithium hydroxidepotassium removalresearch on process technology
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