The recycling of value metals from spent lithium-ion batteries (LIBs) have interesting benefits such as reduction of natural resources exploitation and minimization of energy consumption from mining operations. The aim of this work was to recover lithium, cobalt and manganese from the cathode material present in spent LIBs through a pyrometallurgical process of carboreduction. The method consisted in mixing the cathode material with carbon black and a subsequent heat treatment of the mixture under nitrogen atmosphere. The products obtained were separated by water leaching. To elucidate the reactions and the mechanism involved in the carboreduction process, different studies involving thermodynamic calculations, thermal gravimetric analysis (TGA), differential thermal analysis and X-ray diffraction (XRD) were carried out. The results indicated that Li₂CO₃, CoO and MnO are produced at temperatures lower than 600 °C. The results of atomic absorption spectrometry (AAS) showed that the extraction percentage of lithium was greater than 90% at temperatures between 550 and 600 °C. The products obtained through the process presented here could be used in either the manufacture of new batteries or other industrial applications.

从废旧锂离子电池 (LIB) 中回收有价值的金属具有有趣的好处，例如减少自然资源开采和最大限度地减少采矿作业的能源消耗。这项工作的目的是通过碳还原的火法冶金过程从废锂离子电池中存在的正极材料中回收锂、钴和锰。该方法包括将阴极材料与炭黑混合，然后在氮气氛下对混合物进行热处理。所得产物通过水浸分离。为了阐明碳还原过程中涉及的反应和机理，进行了涉及热力学计算、热重分析 (TGA)、差热分析和 X 射线衍射 (XRD) 的不同研究。₂ CO ₃、CoO 和 MnO 在低于 600 °C 的温度下产生。原子吸收光谱 (AAS) 结果表明，在 550 至 600 °C 的温度下，锂的提取百分比大于 90%。通过此处介绍的过程获得的产品可用于制造新电池或其他工业应用。