e (LFP) from spent lithium battery materials. The impact of the flow field on the movement of injected particles in the cyclone separator is analyzed using computational fluid dynamics (CFD). The findings reveal a classification effect driven by particle density differences, and the separation process is simulated accordingly. The images, animations and data used here are adapted from the work of: Xiaoxian Pang, Chengyun Wang, Wei Yang, Haosen Fan, Shi Zhong, Wenzhi Zheng, Hanbo Zou, Shengzhou Chen (2022) in the article titled 'Numerical simulation of a cyclone separator to recycle the active components of waste lithium batteries' published in the Engineering Applications of Computational Fluid Mechanics, 16(1), 937–951. The source can be found at https://doi.org/10.1080/19942060.2022.2053343 . The images, animations and data are licensed under Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/).