Beijing Engineering Research Center of Process Pollution Control, Division of Environment Technology and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100190, China.
Beijing Engineering Research Center of Process Pollution Control, Division of Environment Technology and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Waste Manag. 2018 Sep;79:545-553. doi: 10.1016/j.wasman.2018.08.027. Epub 2018 Aug 24.
In this paper, a sustainable process to recover valuable metals from spent lithium ion batteries (LIBs) in sulfuric acid using ammonium chloride as reductant was proposed and studied. Being easily reused, ammonium chloride is found to be efficient and posing minor environmental impacts during the overall process. By investigating the effects of a wide range of parameters, e.g., HSO concentration, NHCl concentration, temperature, leaching time, and solid-to-liquid mass ratio, the leaching behaviour of Li, Ni, Co, and Mn was systematically investigated. And the leaching mechanism and kinetics were determined by mineralogically characterization of residues at various reaction times and by fitting using different kinetic models. With this research, it is possible to provide a win-win solution to improve the recycling effectiveness of spent LIBs by using waste salt that is easily reused as the reductant.
本文提出并研究了一种在硫酸中用氯化铵作为还原剂回收废旧锂离子电池（LIB）中有价金属的可持续工艺。氯化铵在整个过程中易于重复使用，具有较高的效率，对环境的影响较小。通过研究广泛的参数的影响，如 HSO4 浓度、NH4Cl 浓度、温度、浸出时间和固液质量比，系统地研究了 Li、Ni、Co 和 Mn 的浸出行为。通过在不同反应时间下对残留物进行矿物学特征分析，并通过使用不同的动力学模型进行拟合，确定了浸出机理和动力学。通过使用易于重复使用的废盐作为还原剂来提高废旧 LIB 的回收效果，本研究为实现双赢提供了可能。
