Mineralogical and petrographic analysis on the flake graphite ore from Saba Boru area in Ethiopia

查看全文 作　　者：Allah [1]D.Jara;Girma [2]Woldetinsae;Amha [3]Betemariam;Jung Yong [1,4]Kim

机构地区：[1]School of Materials Science and Engineering,Jimma Institute of Technology,Jimma University,Jimma,Ethiopia;[2]The Ministry of Mines,Petroleum and Natural Gas,Addis Ababa,Ethiopia;[3]Debre Berhan University,Debre Berhan,Ethiopia;[4]School of Chemical Engineering,Jimma Institute of Technology,Jimma University,Jimma,Ethiopia

出　　处：《International Journal of Mining Science and Technology》索引2020年第30卷第5期,共7页

基　　金：This work was supported by Jimma Institute of Technology through Mega Project. 摘　　要：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. 关键词：MINERALOGY PETROGRAPHY Flake graphite FLOTATION Saba Boru Ethiopia

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Mineralogical and petrographic analysis on the flake graphite ore from Saba Boru area in Ethiopia

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