Recovery of valuable metals from copper slag
Document Type
Article
Publication Date
8-1-2020
Department
Department of Materials Science and Engineering
Abstract
The copper smelting process produces plenty of copper slag every year, which is a hazardous solid waste, but a secondary resource. In the present study, the extraction of copper, nickel, and cobalt from copper slag was investigated through the process of sulfation roasting–water leaching and the process of sulfation roasting–sulfate decomposition roasting–water leaching respectively. Compared with the process of sulfation roasting–water leaching, the process of sulfation roasting–sulfate decomposition roasting–water leaching is a better choice, which could not only get almost the same leaching of copper, nickel, and cobalt as the former process, but has a lower leaching of iron and aluminum. For the process of sulfation roasting–sulfate decomposition roasting–water leaching, the leaching of Cu, Ni, and Co reached up to 74.2%, 71.1%, and 69.6% respectively, under the optimal conditions including sulfation roasted with 80 wt% sulfuric acid addition at 200 °C for 60 min and sulfate decomposition roasted at 650 °C for 60 min, followed by water leached at 90 °C for 30 min with a liquid–solid ratio of 2 ml/g. The leaching of Fe and Al was only 4.9% and 17.6%.
Publication Title
Mining, Metallurgy and Exploration
Recommended Citation
Zhang, C.,
Hu, B.,
Wang, H.,
Wang, M.,
&
Wang, X.
(2020).
Recovery of valuable metals from copper slag.
Mining, Metallurgy and Exploration,
37(4), 1241-1251.
http://doi.org/10.1007/s42461-020-00224-7
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2073
Publisher's Statement
© 2020, Society for Mining, Metallurgy & Exploration Inc. Publisher’s version of record: https://doi.org/10.1007/s42461-020-00224-7