Lithium iron phosphate (LFP) batteries contain metals, toxic electrolytes, organic chemicals and plastics that can lead to serious safety and environmental problems when they are improperly disposed of. The published literature on recovering spent LFP batteries mainly focuses on policy-making and conceptual design. The production line of recovering spent LFP batteries and its detailed operation are rarely reported. A set of automatic line without negative impact to the environment for recycling spent LFP batteries at industrial scale was investigated in this study. It includes crushing, pneumatic separation, sieving, and poison gas treatment processes. The optimum retaining time of materials in the crusher is 3 minutes. The release rate is the highest when the load of the impact crusher is 800 g. An air current separator (ACS) was designed to separate LFP from aluminium (Al) foil and LFP powder mixture. Movement behaviour of LFP powder and Al foil in the ACS were analysed, and the optimized operation parameter (35.46 m/s) of air current speed was obtained through theoretical analysis and experiments. The weight contents of an Al foil powder collector from vibrating screen-3 and LFP powder collector from bag-type dust collector are approximately 38.7% and 52.4%, respectively. The economic cost of full manual dismantling is higher than the recovery production line. This recycling system provides a feasible method for recycling spent LFP batteries.

磷酸铁锂 (LFP) 电池含有金属、有毒电解质、有机化学品和塑料，如果处理不当，可能会导致严重的安全和环境问题。已发表的关于回收废 LFP 电池的文献主要集中在政策制定和概念设计上。回收废旧LFP电池的生产线及其详细操作鲜有报道。本研究研究了一套对环境无负面影响的工业规模回收废旧 LFP 电池的自动生产线。它包括破碎、气选、筛分和毒气处理过程。物料在破碎机中的最佳停留时间为3分钟。反击式破碎机载荷为800g时释放率最高。气流分离器 (ACS) 旨在从铝 (Al) 箔和 LFP 粉末混合物中分离 LFP。分析了LFP粉末和铝箔在ACS中的运动行为，通过理论分析和实验得到了气流速度的优化运行参数（35.46 m/s）。振动筛 3 的铝箔集粉器和袋式除尘器的 LFP 集粉器的重量含量分别约为 38.7% 和 52.4%。全人工拆解的经济成本高于回收生产线。该回收系统为废旧磷酸铁锂电池的回收提供了一种可行的方法。46 m/s) 的气流速度是通过理论分析和实验获得的。振动筛 3 的铝箔集粉器和袋式除尘器的 LFP 集粉器的重量含量分别约为 38.7% 和 52.4%。全人工拆解的经济成本高于回收生产线。该回收系统为废旧磷酸铁锂电池的回收提供了一种可行的方法。46 m/s) 的气流速度是通过理论分析和实验获得的。振动筛 3 的铝箔集粉器和袋式除尘器的 LFP 集粉器的重量含量分别约为 38.7% 和 52.4%。全人工拆解的经济成本高于回收生产线。该回收系统为废旧磷酸铁锂电池的回收提供了一种可行的方法。