Wongnaree Natcha, Patcharawit Tapany, Yingnakorn Tanongsak, Khumkoa Sakhob
School of Metallurgical Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
ACS Omega. 2024 Nov 12;9(47):46822-46833. doi: 10.1021/acsomega.4c05086. eCollection 2024 Nov 26.
This study aimed to investigate the leaching kinetics of valuable metals contained in the calcined black mass derived from the incineration of spent lithium-ion battery (LIB) modules. The effects of sulfuric acid (HSO) concentration (0.5-3 M), hydrogen peroxide (HO) concentration (0.5-2.0 vol %), solid/liquid (S/L) ratio (25-75 g/L), leaching time (10-120 min), and leaching temperature (30 °C-70 °C) on metal leaching efficiency from black mass were investigated. The optimal leaching conditions were achieved with 1 M HSO, 1 vol % HO, and a S/L ratio of 50 g/L at 60 °C for 60 min. Under these conditions, Li, Ni, and Mn had leaching efficiencies of 100%, with Co at 97.17%, respectively. An investigation of the leaching kinetics utilizing HO as an additive revealed that the Avrami model fits the metal leaching process. The results of this study suggested that diffusion and surface chemical reactions controlled the leaching mechanisms of these metals, with activation energies of 7.829, 5.646, and 5.077 kJ mol for Li, Ni, and Co, respectively.
本研究旨在探究废旧锂离子电池（LIB）模块焚烧产生的煅烧黑块中所含有价金属的浸出动力学。研究了硫酸（H₂SO₄）浓度（0.5 - 3 M）、过氧化氢（H₂O₂）浓度（0.5 - 2.0 vol%）、固液（S/L）比（25 - 75 g/L）、浸出时间（10 - 120分钟）和浸出温度（30℃ - 70℃）对黑块中金属浸出效率的影响。在1 M H₂SO₄、1 vol% H₂O₂、S/L比为50 g/L、60℃下浸出60分钟的条件下实现了最佳浸出效果。在此条件下，Li、Ni和Mn的浸出效率均为100%，Co的浸出效率为97.17%。利用H₂O₂作为添加剂对浸出动力学进行的研究表明，阿弗拉米模型符合金属浸出过程。本研究结果表明，扩散和表面化学反应控制了这些金属的浸出机制，Li、Ni和Co的活化能分别为7.829、5.646和5.077 kJ/mol。
