Method for recovering lithium from waste lithium iron phosphate material
The invention discloses a method for recovering lithium from a waste lithium iron phosphate material, which comprises the following steps of: S1, adding water into a waste lithium iron phosphate material to prepare slurry, controlling the pH value of the slurry to be 0.5-2.0, controlling the oxidati...
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Main Authors | , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
05.11.2021
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Subjects | |
Online Access | Get full text |
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Summary: | The invention discloses a method for recovering lithium from a waste lithium iron phosphate material, which comprises the following steps of: S1, adding water into a waste lithium iron phosphate material to prepare slurry, controlling the pH value of the slurry to be 0.5-2.0, controlling the oxidation-reduction potential of the slurry to be 0.05-1.2 V, filtering and taking filter residues to obtain a material A; S2, adding sulfuric acid into the material A, and heating in the atmosphere of air or oxygen at 100-400 DEG C to obtain a material B; S3, adding water into the material B, stirring, filtering and taking filtrate to obtain a material C; S4, controlling the pH value of the material C to be 9-11, filtering and taking filtrate to obtain a material D; S5, enabling the material D to pass through ion exchange resin to obtain a material E; and S6, adding the material E into a sodium carbonate solution, and taking a solid after reaction to obtain lithium carbonate. According to the method disclosed by the inve |
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Bibliography: | Application Number: CN202110885754 |