Abstract With the rapid development of electric vehicles and 5G network technology, cobalt, a potentially critical metal, is widely used in batteries. Considering the supply risk of cobalt, which is approaching the near-critical level, it is necessary to comprehend the status of cobalt resources and analyze the potential recycling of cobalt from metallurgical wastes and spent cobalt compounds. In this paper, the existing types, distribution and reserves of cobalt resources are first introduced. Subsequently, the importance of recovering cobalt from metallurgical wastes is discussed, and the zinc plant purification residue (ZPPR) is introduced in particular. Recovering cobalt, zinc, cadmium, and other valuable elements from ZPPR is significant in addressing problems associated with these solid wastes. Metallurgical processes for the separation and recovery of zinc and cobalt from ZPPR are investigated in detail in subsequent sections, which include selective acid leaching, oxidation-precipitation, ammonia-ammonium sulfate leaching, and solvent extraction. Their mechanisms and performance are also reviewed. The results suggest that further research is required to improve the separation and extraction selectivity and efficiency, and also for the development of high-value utilization of ZPPR and a more efficient method for extracting cobalt from zinc leaching solution.

中文翻译：

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钴资源概况及锌厂提纯残渣钴回收综合分析-综述

摘要 随着电动汽车和5G网络技术的快速发展，钴作为一种潜在的关键金属，被广泛应用于电池中。考虑到接近临界水平的钴供应风险，有必要了解钴资源状况，分析从冶金废料和废钴化合物中回收钴的潜力。本文首先介绍了钴资源的现有类型、分布和储量。随后讨论了从冶金废料中回收钴的重要性，并重点介绍了锌厂净化残渣（ZPPR）。从 ZPPR 中回收钴、锌、镉和其他有价值的元素对于解决与这些固体废物相关的问题具有重要意义。在后续章节中详细研究了从 ZPPR 中分离和回收锌和钴的冶金工艺，包括选择性酸浸、氧化沉淀、氨-硫酸铵浸出和溶剂萃取。他们的机制和表现也被审查。结果表明，需要进一步研究以提高分离和提取的选择性和效率，也需要开发ZPPR的高价值利用和更有效的从锌浸出液中提取钴的方法。