Selective hydrogen reduction of binary iron-cobalt chlorides

Global demand for cobalt is proliferating with the booming usage and consumption of Li-ion batteries in energy storage applications. With high cobalt content, cobalt white alloy has been an important intermediate product for cobalt production. In this paper, a method of hydrochlorination roasting-hy...

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Bibliographic Details
Published in:Journal of Central South University 2023-12, Vol.30 (12), p.3991-4003
Main Authors: Li, Hao, Guo, Xue-yi, Shi, Yao, Wang, Chao, Yu, Da-wei, Tian, Qing-hua
Format: Article
Language:English
Subjects:
Binary alloys
Chemical vapor deposition
Chlorides
Cobalt
Energy storage
Engineering
Hydrochlorination
Hydrogen
Hydrogen reduction
Iron
Lithium-ion batteries
Metallic Materials
Power consumption
Rechargeable batteries
Roasting
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Summary:Global demand for cobalt is proliferating with the booming usage and consumption of Li-ion batteries in energy storage applications. With high cobalt content, cobalt white alloy has been an important intermediate product for cobalt production. In this paper, a method of hydrochlorination roasting-hydrogen reduction of cobalt white alloy is proposed to separate the valuable metals in cobalt white alloy. The hydrochlorination roasting process achieves the separation of copper and silicon from the cobalt white alloy and produces iron-cobalt binary chloride. This paper focuses on the effects of reduction temperature, reduction time, and hydrogen concentration during the hydrogen reduction of iron-cobalt binary chloride, with the aim of separating the two metals. The Co/Fe mass ratio in the reduction product is 10.71, with the cobalt content usually above 90 wt% under optimal conditions. The reduction product is a micro-fibrous Co-rich alloy exhibiting a significant specific surface area, which may have promising applications in catalysis. A mechanism based on chemical vapor deposition has been proposed to explain the formation of micro-fibrous products.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-023-5512-4