中国资源综合利用2025，Vol.43Issue(11)：24-28,5.DOI:10.3969/j.issn.1008-9500.2025.11.008
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
Research on the Process of Using Ammonium Sulfate Assisted Oxidation Roasting to Recover Lithium from Waste LiFePO4 Batteries
摘要
Abstract
In response to the demand for resource recycling of waste LiFePO4(LFP)batteries,the ammonium sulfate assisted oxidation roasting-water immersion method is used to selectively extract lithium from waste LFP cathode materials.The optimal process conditions are determined by systematically optimizing parameters such as roasting temperature,material ratio,and roasting time.When the roasting temperature is 400℃,the material ratio is 0.75,and the roasting time is 1.0 h,the lithium leaching rate reaches 82.74%.X-Ray Diffraction(XRD)analysis shows that the Li2SO4 and FePO4 generated in the roasted sand confirm the effective extraction of lithium,while the formation of insoluble phases such as Li3Fe2(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)2SO4 completely decomposes into NH3,which escapes without introducing impurities.The relevant conclusion provides a reliable method for efficient and clean recycling of lithium from waste LFP batteries.关键词
废旧磷酸铁锂(LFP)电池/硫酸铵/氧化焙烧/优先提锂Key words
waste LiFePO4(LFP)batteries/ammonium sulphate/oxidation roasting/prioritize lithium extraction分类
资源环境引用本文复制引用
曹欢,王芳,刘贵清,解雪,张帆,张金池..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[J].中国资源综合利用,2025,43(11):24-28,5.基金项目
矿冶科技集团青年基金项目(04-2539). （04-2539）
