Method for preparing iron phosphate based on waste lithium iron phosphate battery

The invention provides a method for preparing iron phosphate based on a waste lithium iron phosphate battery, which comprises the following steps of: putting positive electrode black powder of the waste lithium iron phosphate battery into a roasting treatment furnace filled with protective gas for r...

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Main Authors ZHONG FAPING, XIONG YIZHI, TAN SHUIFA, CHEN JIE, JIANG SUBIN, HE CHIHUAN, LIU HONGBING, ZHU JIQUN
Format Patent
LanguageChinese
English
Published 02.07.2024
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention provides a method for preparing iron phosphate based on a waste lithium iron phosphate battery, which comprises the following steps of: putting positive electrode black powder of the waste lithium iron phosphate battery into a roasting treatment furnace filled with protective gas for roasting reaction, and controlling the roasting reaction temperature by adjusting the flow of input chlorine gas based on a mixture in the roasting treatment furnace, the roasting reaction temperature is controlled to be 50-300 DEG C; carrying out water leaching on a roasted product after roasting reaction, and then carrying out suction filtration to obtain a filter cake; adding hydrochloric acid into the filter cake for dissolving, and filtering to obtain filtrate; and adding sodium hydroxide into the filtrate, adjusting the pH value to 10-12, and washing and drying the obtained precipitate to obtain the iron phosphate. The method for preparing iron phosphate based on the waste lithium iron phosphate battery has th
Bibliography:Application Number: CN202410697169