Method for extracting and recycling metal elements in lithium battery by using wet process

• Main Authors: ZHONG FAPING, TAN SHUIFA, JIANG SUBIN, HE CHIHUAN, LIU HONGBING, ZHU JIQUN
• Format: Patent
• Language: Chinese; English
• Published: 12.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; 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

The invention provides a method for extracting and recycling metal elements in a lithium battery by using a wet process, which comprises the following steps of: 1, pretreating the lithium battery to obtain a powder mixture containing a positive electrode active material; step 2, carrying out acid leaching to obtain a leaching solution; step 3, if the lithium battery to be recycled contains the lithium iron phosphate battery, heating and combusting a solid component obtained after solid-liquid filtration after acid leaching in an oxygen-containing environment to remove carbon, and remaining iron phosphate; and step 4, if the lithium battery to be recycled contains the ternary lithium battery, extracting a leaching solution obtained after solid-liquid filtration after acid leaching, and obtaining a raffinate containing a lithium element and an organic phase containing Ni/Co/Mn elements by using diisooctyl phosphate as an extracting agent. 本发明提供了一种使用湿法提取回收锂电池中的金属元素的方法，其中包括如下步骤：步骤1，预处理锂电池，得到含有正极活性材料的粉末混合物；步骤2，酸浸，