Spent lithium-ion batteries contain metals, LiCoO₂, graphite and other substances that can cause environmental pollution in the case of random disposal. Thus recycling of spent lithium-ion batteries is important. In this study, components in spent lithium-ion batteries are fully dissociated by crushing and screening in the first step. LiCoO₂ and graphite particles are enriched in −0.25 mm products. Density and particle size of LiCoO₂ particles are larger than those of graphite based on the analysis of physical property. Subsequently, the separation effect is obtained by adjusting the rotating speed and water counter pressure of Falcon centrifuge as well as particle size. Composition of sorted products and optimal sorting conditions are determined by calculation of roasting test and scanning electron microscope. Optimum conditions are as follows: water counter pressure at 0.025 MPa, rotation frequency at 50.00 Hz. Best grade and recovery efficiency of LiCoO₂ are 84.87% and 83.14%, respectively. The result also indicates when the particle size ranges between 0.045 mm and 0.09 mm, the sorting performance reaches the best effect.

废锂离子电池包含金属，LiCoO ₂，石墨和其他物质，如果随机处置，可能会对环境造成污染。因此，废旧锂离子电池的回收很重要。在这项研究中，第一步中，通过破碎和筛分可以完全分解废锂离子电池中的成分。LiCoO ₂和石墨颗粒富含-0.25 mm产品。LiCoO _2的密度和粒径根据物理性能分析，颗粒比石墨大。随后，通过调节Falcon离心机的转速和水反压以及颗粒大小，可以获得分离效果。分选产品的组成和最佳分选条件通过焙烧试验和扫描电子显微镜的计算来确定。最佳条件如下：水反压为0.025 MPa，旋转频率为50.00 Hz。LiCoO _2的最佳品位和回收效率分别为84.87％和83.14％。该结果还表明，当粒径在0.045 mm至0.09 mm之间时，分选性能达到最佳效果。