Dry-wet repair regeneration method of lithium iron phosphate leftover material

• Main Authors: ZHAO ZHI'AN, YAN XIULIN, XU PEIHUA, ZHANG LI, QIAN HUA, HU QIAN
• Format: Patent
• Language: Chinese; English
• Published: 16.01.2024
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention discloses a dry-wet repair regeneration method of lithium iron phosphate leftover materials, which comprises the following steps: soaking the leftover materials at a temperature A to separate active substances from aluminum foil; stirring the aluminum foil material at a linear speed A, and filtering the material by using a filter with an aperture A to obtain a material A passing through the filter; stirring the material A at a linear speed B, and filtering the material A by using a filter with an aperture B to obtain a material B passing through the filter; drying the material B in an air atmosphere to obtain a lithium iron phosphate active material; crushing the lithium iron phosphate active substance; calcining the lithium iron phosphate active substance in a carbon dioxide atmosphere to obtain regenerated lithium iron phosphate powder; and crushing the lithium iron phosphate powder to obtain a lithium iron phosphate finished product. The content of the obtained lithium iron phosphate aluminum