Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching
| Autor: | Pekka Taskinen, Udit S. Mohanty, Taina Kalliomäki, Chao Peng, Lotta Rintala, Jari Aromaa, Petteri Halli, Sipi Seisko, Mari Lundström |
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| Přispěvatelé: | Hydrometallurgy and Corrosion, Department of Chemical and Metallurgical Engineering, VTT Technical Research Centre of Finland, Department of Materials Science and Engineering, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
secondary metal sources
Materials science hydrometallurgy 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Electrolyte modelling 020401 chemical engineering Geochemistry and Petrology 0204 chemical engineering valorization Dissolution 021102 mining & metallurgy Hydrometallurgy Metallurgy General Chemistry copper electrorefining Geotechnical Engineering and Engineering Geology Tailings Copper Anode extraction efficiency Autoclave Nickel chemistry Leaching (metallurgy) sulphuric acid leaching |
| Zdroj: | Mohanty, U S, Kalliomäki, T, Seisko, S, Peng, C, Rintala, L, Halli, P, Aromaa, J, Taskinen, P & Lundström, M 2021, ' Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching ', Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, vol. 130, no. 4, pp. 378-387 . https://doi.org/10.1080/25726641.2019.1670008 |
| Popis: | Anode slimes are valuable by-products in the electrolytic copper refinery process. This study aimed to investigate maximum extraction efficiency of Cu and Ni from slimes originating from the electrorefining of anodes containing high [Ni]. In addition, the extractions of Se, Te, As and Bi were determined. A factorial leaching series was conducted with T = 140–160°C, [H2SO4] = 12–20%, pO2= 2–8 bars and solid/liquid ratio = 200–400 g/L. The highest Ni extraction of 99.7% was obtained with [H2SO4] = 20%, pO2 = 8 bar and T = 160°C while maintaining S/L ratio of 200 g/L. The extraction of copper was found to be within 97–99% in all the leaching experiments. Increasing acidity and decreasing S/L ratio increased the efficiency of Cu extraction. Mineralogical characterizations by SEM-EDX demonstrated the presence of Ag2Se, BaSO4, PbSO4 and several oxide phases in the leach residue. |
| Databáze: | OpenAIRE |
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