COMPREHENSIVE RECYCLING METHOD FOR WASTE LITHIUM IRON PHOSPHATE BATTERY

A comprehensive recycling method for a waste lithium iron phosphate battery relates to a waste lithium ion battery recycling technology, and particularly comprises: first selectively extracting lithium, and then using a lithium extraction residue to prepare iron phosphate, the using the lithium extr...

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Bibliographische Detailangaben
Hauptverfasser:	WANG, Zi, WU, Shanmu, LIU, Chang, ZHANG, Chaowen, CHEN, Zan, LIU, Xunbing, OUYANG, Jianjun, ZHOU, Quncheng, DONG, Xiongwu
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM COMPOUNDS THEREOF ELECTRICITY FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PRETREATMENT OF RAW MATERIALS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A comprehensive recycling method for a waste lithium iron phosphate battery relates to a waste lithium ion battery recycling technology, and particularly comprises: first selectively extracting lithium, and then using a lithium extraction residue to prepare iron phosphate, the using the lithium extraction residue to prepare the iron phosphate comprising: adding the lithium extraction residue to water to form a slurry, adding hydrochloric acid and stirring to react, so that iron is completely dissolved, performing solid-liquid separation, on the basis of iron and phosphorus contents of the obtained liquid, adding trisodium phosphate or ferric chloride, and then adding a sodium hydroxide solution to precipitate crude iron phosphate; and then performing reverse three-stage washing to remove impurities to obtain a battery iron phosphate product. The problem of environmental protection is solved and meanwhile, all of the valuable elements are recycled, and a relative cost is greatly reduced by about 25%.