Lithium resource recycling method on waste lithium ion battery negative plate

• Main Authors: LI BAOHUA, DU HONGDA, KANG FEIYU, LI XUHUI, CHU XIAODONG, CHEN ZHIPENG
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a lithium resource recycling method on a waste lithium ion battery negative plate. The method comprises the following steps: firstly manufacturing the massive powder on the surface of the negative plate as fine powder, and supplementing with the ultrasonic stirring in the reaction process with the diluted hydrochloric acid, thereby realizing the efficient leaching of the lithium resource. The method provided by the invention has the advantages of being simple in process flow, low in cost, easy to recycle lithium ion battery negative plate in batch and realize the industrial application; and the high-pure lithium carbonate powder obtained through the recycling method provided by the invention can be directly used for industrial production, and the economic value of the recycling is improved. 本发明提供种废旧锂离子电池负极片上锂资源回收方法，首先将负极片表面的块状粉料制成精细粉料，并在与稀盐酸反应过程中辅以超声搅拌，实现了锂资源的高效浸出。本发明具有工艺流程简单、成本低廉，易于批量回收锂离子电池负极片并实现产业化应用的优势，而且经过该回收方法得到的高纯碳酸锂粉末可直接用于工业生产，提高了回收的经济价值。