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Open AccessArticle

Processing of Waste Copper Converter Slag Using Organic Acids for Extraction of Copper, Nickel, and Cobalt

1
CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India
2
School of Minerals Processing & Bioengineering, Central South University, No. 932 Lushan South Road, Yuelu District, Changsha 410083, China
3
Institut de physique du globe de Paris, Université de Paris, CNRS, F-75005 Paris, France
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(3), 290; https://doi.org/10.3390/min10030290 (registering DOI)
Received: 2 March 2020 / Revised: 19 March 2020 / Accepted: 20 March 2020 / Published: 23 March 2020
(This article belongs to the Section Mineral Processing and Metallurgy)
An innovative, economical, and environmentally sound hydrometallurgical process has been proposed for recovering Cu, Ni, and Co from copper-rich converter slag by organic acids. In the leaching experiments, the effects of organic acid concentrations, pulp density, temperature, and time were investigated. Optimum recovery of 99.1% Cu, 89.2% Ni, 94% Co, and 99.2% Fe was achieved in 9–10 h at 308 K (35 °C) temperature and 15% pulp density with 2 N citric acid using <45 µm particles. Pourbaix diagrams of metal-water-citrate systems were supplemented to examine solubility of ligands at the desired conditions. Furthermore, the leaching mechanism was based on the SEM-EDS (energy-dispersive X-ray spectroscopy) and XRD characterization as well as the leaching results obtained. View Full-Text
Keywords: converter slag; citric acid; leaching; metal-water-citrate system; selectivity converter slag; citric acid; leaching; metal-water-citrate system; selectivity
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MDPI and ACS Style

Meshram, P.; Prakash, U.; Bhagat, L.; Abhilash; Zhao, H.; van Hullebusch, E.D. Processing of Waste Copper Converter Slag Using Organic Acids for Extraction of Copper, Nickel, and Cobalt. Minerals 2020, 10, 290.

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