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Establishment of a hydrometallurgical scheme for the recovery of Copper, Nickel, and Cobalt from Smelter Slag and Its economic evaluation

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dc.contributor.author Godirilwe, Labone Lorraine
dc.contributor.author Haga, Kazutoshi
dc.contributor.author Altansukh, Batnasan
dc.contributor.author Jeon, Sanghee
dc.contributor.author Danha, Gwiranai
dc.contributor.author Shibayama, Atsushi
dc.date.accessioned 2024-06-14T06:44:29Z
dc.date.available 2024-06-14T06:44:29Z
dc.date.issued 2023-07
dc.identifier.citation Godirilwe, L. L., Haga, K., Altansukh, B., Jeon, S., Danha, G., & Shibayama, A. (2023). Establishment of a Hydrometallurgical Scheme for the Recovery of Copper, Nickel, and Cobalt from Smelter Slag and Its Economic Evaluation. Sustainability (Switzerland), 15(13), Article 10496. https://doi.org/10.3390/su151310496 en_US
dc.identifier.issn 2071-1050
dc.identifier.uri https://repository.biust.ac.bw/handle/123456789/580
dc.description.abstract In pursuit of carbon neutrality, the demand for metals that are necessary for the development of clean energy technologies is rapidly increasing. Metallurgical waste, such as slag, presents a promising secondary source of these key metals. This research aims to develop an eco-friendly hydrometallurgical process to recover Cu, Ni, and Co from discarded copper/nickel slag. High-pressure acid leaching (HPAL) was used to selectively leach Ni, Cu, and Co from the fayalite slag, yielding high leaching efficiencies of 99.9%, 89.4%, and 99.9%, respectively, with low Fe and Si tenors to the pregnant leach solution (PLS). The solvent extraction (SX) technique utilizing LIX 984N was used to selectively extract and enrich copper from the dilute PLS to about 23 g/L Cu with a very low Fe concentration of 0.05 g/L. Potassium amyl xanthate (PAX) solution was used to form Ni and Co xanthate complexes from the raffinate solution. Nickel was selectively recovered using ammonia solution, while the cobalt xanthate complex was thermally decomposed and recovered as cobalt oxide solids of about 25 wt.% Co. A comprehensive process flowsheet is presented. Furthermore, to realize the real application of the developed slag cleaning process, a preliminary economic evaluation was performed. en_US
dc.publisher MDPI, Basel, Switzerland en_US
dc.subject Slag en_US
dc.subject Copper en_US
dc.subject Nickel en_US
dc.subject Cobalt en_US
dc.subject Recovery en_US
dc.subject High-pressure leaching en_US
dc.subject Solvent extraction en_US
dc.subject Complexation en_US
dc.subject Hydrometallurgy en_US
dc.subject Waste en_US
dc.title Establishment of a hydrometallurgical scheme for the recovery of Copper, Nickel, and Cobalt from Smelter Slag and Its economic evaluation en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department cme en_US


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