废旧磷酸铁锂电池的回收利用最近成为焦点话题。因此,评估不同的废铁磷酸锂回收过程成为工业发展的必要。这里,基于环境的多种视角,经济和技术,对四种典型的废旧磷酸铁锂回收工艺(Hydro-A:湿法冶金总浸出回收工艺;Hydro-B(H2O2/O2):湿法冶金选择性提锂工艺;Pyro:火法冶金回收工艺;直接:直接再生工艺)进行了综合比较。综合评价研究利用环境,经济和技术作为评价指标,并采用熵权法和层次分析法对综合指标权重进行耦合。结果表明,Hydro-A的综合评价值,Hydro-B(H2O2),Hydro-B(O2),Pyro和Direct分别为0.347、0.421、0.442、0.099和0.857。因此,应进一步提高Direct的技术成熟度,以实现早期工业化。在此基础上,本研究综合考虑环境,对废旧磷酸铁锂回收工艺进行了定量评价,经济和技术因素,为制定回收工艺提供进一步的指导。
The recycling of spent lithium iron phosphate batteries has recently become a focus topic. Consequently, evaluating different spent lithium iron phosphate recycling processes becomes necessary for industrial development. Here, based on multiple perspectives of environment, economy and technology, four typical spent lithium iron phosphate recovery processes (Hydro-A: hydrometallurgical total leaching recovery process; Hydro-B(H2O2/O2): hydrometallurgical selective lithium extraction process; Pyro: Pyrometallurgical recovery process; Direct: Direct regeneration process) were compared comprehensively. The comprehensive evaluation study uses environment, economy and technology as evaluation indicators, and uses the entropy weight method and analytic hierarchy process to couple the comprehensive indicator weights. Results show that the comprehensive evaluation values of Hydro-A, Hydro-B (H2O2), Hydro-B (O2), Pyro and Direct are 0.347, 0.421, 0.442, 0.099 and 0.857, respectively. Therefore, the technological maturity of Direct should be further improved to enable early industrialization. On this basis, this study conducted a quantitative evaluation of the spent lithium iron phosphate recycling process by comprehensively considering environmental, economic and technical factors, providing further guidance for the formulation of recycling processes.