Metallurgical Evaluation of the Leaching Behavior of Copper–Cobalt-bearing Ores by the Principal Component Analysis Approach: Case Study of the DRC Copperbelt Ore Deposits
| العنوان: | Metallurgical Evaluation of the Leaching Behavior of Copper–Cobalt-bearing Ores by the Principal Component Analysis Approach: Case Study of the DRC Copperbelt Ore Deposits |
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| المؤلفون: | Léon Zeka, Alain Mwamba, Patrick Ntakamusthi, Méschac-Bill Kime, Guy Nkulu, Antoine F. Mulaba-Bafubiandi, Bienvenu Ilunga Mbuya |
| المصدر: | Journal of Sustainable Metallurgy. 7:985-994 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Reducing agent, Metallurgy, 0211 other engineering and technologies, Metals and Alloys, chemistry.chemical_element, 02 engineering and technology, 010501 environmental sciences, Environmental Science (miscellaneous), 01 natural sciences, Copper, Redox, Matrix (chemical analysis), chemistry, Mechanics of Materials, Yield (chemistry), Principal component analysis, Leaching (metallurgy), Cobalt, 021102 mining & metallurgy, 0105 earth and related environmental sciences |
| الوصف: | Cobalt (III) is present in most of the minerals in the Congolese Copperbelt deposits. Its hydrometallurgical treatment requires to be reduced to Co2+, using a reducing agent. Using the Principal Component Analysis (PCA) approach, a 16 × 7 matrix was built to identify groups of ores/reducers with similar metallurgical performance. The study was based on the optimum values of reducing agents for the four selected minerals: 1.34, 0.33, 1.51, 0.25 g for Fe2+; 0.63, 0.51, 0.47, 0.24 g for Na2S2O5; 0.37, 0.11, 0.34, 0.21 g for Fe; and 2.02, 0.07, 0.13, 0.16 g for Cu. These optima crossed with other variables retained, in particular, the Cu and Co yields, reducing agent consumption, Cu and Co solubilization, and redox potential at leaching completion were reduced to two main components F1 (41.38%) and F2 (31, 46%). It emerges from the application of Principal Component Analysis to the 16 × 7 matrix a correlation circle showing that the variables having a major influence on the solubilization of Co are the reducing agent consumption by Co (24.48%), the amount of reducing agent (20.14%), and the potential at reaction completion (18.61%). Homogeneous groups of ores/reducers with good performance quality (F1 + F2 = 72.84%) were identified. In all and from a performance perspective, the ores treated with Fe2+, Fe, and Cu gave satisfactory metallurgical results (> 95% yield). On the contrary, the use of Na2S2O5 on all the deposits gave lower results (between 90% and 95% Co). |
| تدمد: | 2199-3831 2199-3823 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::40713ead59d7768446ef4353aaef5445 https://doi.org/10.1007/s40831-021-00389-5 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........40713ead59d7768446ef4353aaef5445 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 21993831 21993823 |
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