The Effects of Milling and pH on Co, Ni, Zn and Cu Bioleaching from Polymetallic Sulfide Concentrate
| العنوان: | The Effects of Milling and pH on Co, Ni, Zn and Cu Bioleaching from Polymetallic Sulfide Concentrate |
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| المؤلفون: | Marja Salo, Tiina Heikola, Jarno Mäkinen, Päivi Kinnunen |
| المصدر: | Minerals Volume 11 Issue 3 Mäkinen, J, Heikola, T, Salo, M & Kinnunen, P 2021, ' The effects of milling and ph On Co, Ni, Zn and Cu bioleaching from polymetallic sulfide concentrate ', Minerals, vol. 11, no. 3, 317 . https://doi.org/10.3390/min11030317 Minerals, Vol 11, Iss 317, p 317 (2021) |
| بيانات النشر: | Multidisciplinary Digital Publishing Institute, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Pyrrhotite, lcsh:QE351-399.2, Sulfide, 0211 other engineering and technologies, chemistry.chemical_element, 02 engineering and technology, Zinc, engineering.material, 03 medical and health sciences, nickel, Nickel, Bioleaching, 021102 mining & metallurgy, chemistry.chemical_classification, 0303 health sciences, lcsh:Mineralogy, Pyrite, 030306 microbiology, Geology, Cobalt, Geotechnical Engineering and Engineering Geology, cobalt, 6. Clean water, pyrite, chemistry, pyrrhotite, engineering, bioleaching, Leaching (metallurgy), Particle size, Nuclear chemistry |
| الوصف: | Acid bioleaching of a low-grade and polymetallic sulfide concentrate was studied, in order to determine suitable feed material particle size and pH for efficient leaching of valuable metals. The sulfide concentrate consisted of pyrite (50 wt %), pyrrhotite (31 wt %), quartz (10 wt %) and lower amounts of cobalt, nickel, zinc and copper (each < 1 wt %). After adaptation of microorganisms in shake flasks, stirred tank tests were conducted at different pH levels and supplementing feed material at different particle sizes (milled to d80 < 150 µm, < 50 µm, < 28 µm, < 19 µm). The operation at pH 1.8 was seen prone to iron precipitation, while this was not observed at a pH between 1.3 and 1.5. Additional milling to decrease particle size from the initial d80 < 150 µm had a major positive effect on cobalt- and nickel-leaching yields, proposing that at least d80 < 28 µm should be targeted. The best leaching yields for the main economic elements, cobalt and nickel, were 98% and 94%, respectively, reached with d80 < 19 µm at pH 1.3. However, it was considered that at pH 1.5, similar results could be obtained. This research sets the basis for continuing the experiments at a continuous pilot scale. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2075-163X |
| DOI: | 10.3390/min11030317 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::250a98934f599da1b4c16e19a2d598ce |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....250a98934f599da1b4c16e19a2d598ce |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 2075163X |
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| DOI: | 10.3390/min11030317 |