Mineralogical and petrographic analysis on the flake graphite ore from Saba Boru area in Ethiopia
| Autor: | Amha Betemariam, Girma Woldetinsae, Jung Yong Kim, Allah D. Jara |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science Petrography 0211 other engineering and technologies Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Raw material 020401 chemical engineering Geochemistry and Petrology Graphite Flotation Saba Boru 0204 chemical engineering lcsh:Mining engineering. Metallurgy 021101 geological & geomatics engineering Cement Metallurgy Beneficiation Geotechnical Engineering and Engineering Geology Mineralogy Flake graphite chemistry Gangue Ethiopia Inductively coupled plasma Carbon |
| Zdroj: | International Journal of Mining Science and Technology, Vol 30, Iss 5, Pp 715-721 (2020) |
| ISSN: | 2095-2686 |
| Popis: | The mineralogy and petrography of natural graphite in Saba Boru of Ethiopia indicate that there exists flake graphite with a slightly oval structured fine size according to our study on thin and polished sections. Herein, for estimating the carbon content in graphite, the ASTM-C561, the test method for ash in a graphite sample, was used. For characterizing graphite, x-ray diffraction, x-ray fluorescence, inductively coupled plasma mass spectroscopy, and scanning electron microscopy were also used. Chemical analysis of ore samples determined that the average compositions are 63.35% SiO2, 15.45% Al2O3, 2.36% Fe2O3, 2.07% K2O, less than1% others, and loss-on-ignition (LOI) in the range of ~4.74%–37.42%. The total carbon content of graphitic ore ranged from 4.11% to 33.14%. Importantly, when graphite is concentrated through floatation, its average purity and recovery are 92.97% and 90.82%, respectively. Furthermore, once the graphite concentrates are treated with hydrofluoric acid, the average value attains a high grade of 96.48% C. Moreover, the average ash content is 81.93% (pre-flotation) and 3.1% (post-flotation), respectively. Finally, after beneficiation, a silica is identified as a major gangue (85.88%), usable as a raw material for other purposes such as cement. Hence, these graphite-bearing rocks seem to be worth exploring for commercialization opportunities. |
| Databáze: | OpenAIRE |
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