失效钴酸锂电池正极材料的回收方法

• Format: Patent
• Language: Chinese
• Published: 28.12.2018
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; 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; 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

本发明公开了种失效钴酸锂电池正极材料的回收方法，属于钴酸锂电池回收技术领域。将失效钴酸锂电池正极材料上的铝箔拆除后，剩余钴酸锂电池正极材料经破碎后与硫酸亚铁混合后置于反应器中，加水调浆；向浆体中加入无机酸溶液进行反应；反应结束后，加入无机碱中和余酸，调节浆体pH值以沉淀Fe；过滤以完成液固分离，固体渣ㄧ即为碳粉与氢氧化铁的混合物，浸出液即为高浓度钴、锂溶液；向浸出液中加入无机碱，调节浸出液pH值以沉淀钴，实现钴、锂分离；过滤的固体渣Ⅱ即为Co(OH)，滤液即为纯净的高浓度含锂溶液。本发明采用常用且廉价的硫酸亚铁还原钴酸锂，回收钴、锂，中和余酸除铁，操作简单，成本低廉，钴、锂回收率高。 The invention discloses a recovery method of a spent lithium cobaltate battery positive electrode material and belongs to the technical field of recovery of lithium cobaltate batteries. The method comprises the steps that after aluminum foil on the spent lithium cobaltate battery positive electrode material is removed, the rest of the lithium cobaltate battery positive electrode material is crushed and mixed with ferrous sulfate, then the mixture is put into a reactor, and water is added to make slurry; an inorganic acid solution is added to the slurry to perform a reaction; after the reaction is completed, inorganic base is added to neutralize residual acid, and pH value of the slurry is adjusted so that Fe<3+> can be