硫酸铵辅助氧化焙烧回收废旧磷酸铁锂电池中锂的工艺研究

打开文本图片集

关键词：废旧磷酸铁锂（LFP）电池；硫酸铵；氧化焙烧；优先提锂 中图分类号：X734 文献标识码：A 文章编号：1008-9500（2025）11-0024-05 DOI： 10.3969/j.issn.1008-9500.2025.11.008

Research on the Process of Using Ammonium Sulfate Assisted Oxidation Roasting to Recover Lithium from Waste LiFePO Batteries

CAO Huan， WANG Fang， LIU Guiqing， XIE Xue， ZHANG Fan， ZHANG Jinchi （Jiangsu BGRIMMMetal Recycling Science& Technology Co.，Ltd.，Xuzhou ，China）

Abstract： In response to the demand for resource recycling of waste LiFePO （LFP） batteries，the ammonium sulfate assisted oxidation roasting-water immersion method is used to selectively extract lithium from waste LFPcathode materials. The optimal process conditions are determined bysystematicallyoptimizing parameters such as roasting temperature， material ratio，and roasting time.When the roasting temperature is 400 ΔC ，the material ratio is O.75，and the roasting time is1.0 h， the lithium leaching rate reaches 82.74% . X-Ray Diffraction （XRD） analysis shows that the Li Ω2>04 andFePO （204号 generated inthe roasted sand confirm the effctive extractionof lithium，whilethe formationof insoluble phases such as Li3Fe Φ2（PO4）3 limits the further leaching of lithium.The analysis results of Scanning Electron Microscope-Energy Dispersive Spectrometer （SEM-EDS） shows that there is no residual N in the roasted sand， indicating that （NH4）2S04 completely decomposes into NH3，which escapes without introducing impurities.The relevantconclusion provides areliable method for efficient and clean recycling of lithium from waste LFP batteries.

Keywords：wasteLiFeP ⋅04 （LFP） batteries;ammonium sulphate; oxidation roasting; prioritize lithium extraction

《新能源汽车产业发展规划（2021—2035年）》明确指出，要推动动力电池全价值链发展，完善动力电池回收、梯级利用和再资源化的循环利用体系，鼓励共建共用回收渠道[]。（剩余3940字）