Recovery of Metals from Copper Smelting Slag Using Coke and Biochar

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2024-03
Major/Subject
Mcode
Degree programme
Language
en
Pages
15
Series
Journal of Sustainable Metallurgy, Volume 10, issue 1, pp. 360-374
Abstract
With the purpose of recovering the metal values, in this study the copper slag was reduced by coke and biochar at 1250 °C in an argon gas atmosphere using the isothermal reduction/drop quenching technique. The phase compositions of metal, matte, and slag were determined using electron probe microanalysis (EPMA). The effects of reduction time and amount of reductant were investigated. The distribution of elements between metal/matte and slag was ascertained based on the elemental concentrations determined by EPMA. It was found that copper concentration in slag can be effectively decreased to approximately 0.4–0.6 wt% within 5 min by coke and biochar. Copper and nickel can also be successfully recovered into the copper alloy phase once settling has been accomplished.
Description
Publisher Copyright: © The Author(s) 2024.
Keywords
Circular economy, Hazardous materials, Reduction, Resource efficiency, Slag cleaning
Other note
Citation
Chen, M, Sukhomlinov, D, Taskinen, P, Hamuyuni, J, Michallik, R M, Lindgren, M & Jokilaakso, A 2024, ' Recovery of Metals from Copper Smelting Slag Using Coke and Biochar ', Journal of Sustainable Metallurgy, vol. 10, no. 1, pp. 360-374 . https://doi.org/10.1007/s40831-024-00793-7