Flowsheet Options for Cobalt Recovery in African Copper–cobalt Hydrometallurgy Circuits
Flowsheet Options for Cobalt Recovery in African Copper–cobalt Hydrometallurgy Circuits
复制标题
非洲铜钴湿法冶金回路中钴回收的流程图选项
DOI：
10.1080/08827508.2018.1514301
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发表时间：
2018
影响因子：
5
通讯作者：
M. B. Mooiman
中科院分区：
文献类型：
--
作者：
K. C. Sole;J. Parker;P. Cole;M. B. Mooiman
摘要钴的价格在过去两年里上涨了约450%，这主要是由于对锂离子电池的需求不断增加。随着2017年kt的正式生产，刚果民主共和国生产的钴占世界总量的一半以上。非洲铜带的业务传统上侧重于铜生产；然而，现在也必须考虑从这些矿石中回收钴。可能会有过多的加工路线。大多数湿法冶金流程从低品位铜溶剂萃取回路的萃余液中回收钴。下游净化工艺包括用各种试剂顺序沉淀、溶剂萃取和离子交换。产品选择包括氢氧化物、碳酸盐、硫酸盐和金属阴极。本研究评估了在非洲范围内湿法炼钴的各种方法的技术和经济优势和局限性。
ABSTRACT The price of cobalt has increased by some 450% in the past two years, mainly due to increasing demand for lithium–ion batteries. With an official 2017 production of 64 kt, the Democratic Republic of Congo produces more than half of the world’s cobalt. African Copperbelt operations have traditionally focused on copper production; however, it has now become imperative to also consider cobalt recovery from these ores. A plethora of processing routes is possible. Most hydrometallurgical flowsheets recover cobalt from the raffinate of the low-grade copper solvent-extraction circuit. Downstream purification processes include sequential precipitation with a variety of reagents, solvent extraction, and ion exchange. Product choices include hydroxide, carbonate, sulfate, and metal cathode. This study assesses technical and economic advantages and limitations of various approaches to the hydrometallurgical processing of cobalt in an African context.