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Mineralogical characterization and physical upgrading of radioactive and rare metal minerals from Wadi Al-Baroud granitic pegmatite at the Central Eastern Desert of Egypt
Arabian Journal of Geosciences Pub Date : 2020-05-29 , DOI: 10.1007/s12517-020-05381-z
Mona M. Fawzy , Nasser M. Mahdy , Mabrouk Sami

Granitic pegmatites of Wadi Al-Baroud area in the Central Eastern Desert of Egypt have appreciated amounts of radioactive (U, Th) and rare metal- (Nb, Ta, Y, Zr, Hf, and rare earth elements—REEs) bearing minerals. A combination of both geochemical and physical methods has been used for investigation of Wadi Al-Baroud granitic pegmatites. The identification, imaging, and chemistry of rare metal-bearing minerals were conducted using the optical microscope, X-ray diffraction (XRD), scanning electron microscope (SEM), and electron microprobe analyzer (EMPA). The pegmatites host Nb-Ta oxides (euxenite-Y, fergusonite-Y, and yttrocolumbite-Y), REE minerals (xenotime-Y, monazite-Ce and allanite-Ce), U-Th minerals (thorite and uranothorite), and Hf-rich zircon. In addition, muscovite, quartz, feldspars, and some iron oxide minerals such as magnetite, goethite, and lepidocrocite represent the essential, gangue, and associated minerals. Physical upgrading of Wadi Al-Baroud-mineralized pegmatites was carried out using gravity and magnetic separation techniques. Applying the optimum conditions for both separation techniques, it is possible to attain a good concentrate with an acceptable recovery. Accordingly, the final concentrate contains ~ 0.25% U, 0.46% Th, and 0.31% REE with recovery of 91.17% U, 96.56% Th, and 86.19% REE in a weight of 6.58% out of the original sample assays 0.02% U, 0.04% Th, and 0.03% REE. Therefore, it is well-recommended that the final concentrate should subject to proper hydrometallurgical treatment to extract their valuable metal contents.

中文翻译:

埃及中部东部沙漠瓦迪·巴鲁德花岗岩伟晶岩中放射性和稀有金属矿物的矿物学表征和物理升级

埃及中部东部沙漠的Wadi Al-Baroud地区的花岗伟晶岩含有大量的放射性(U,Th)和稀有金属(Nb,Ta,Y,Zr,Hf和稀土元素REEs)。地球化学和物理方法的结合已被用于研究瓦迪·巴鲁德花岗岩伟晶岩。使用光学显微镜,X射线衍射(XRD),扫描电子显微镜(SEM)和电子微探针分析仪(EMPA)进行了稀有金属矿物的鉴定,成像和化学反应。伟晶岩含有Nb-Ta氧化物(优锌矿-Y,铬铁矿-Y和钇钴矿-Y),REE矿物质(xenotime-Y,独居石Ce和尿铝石-Ce),U-Th矿物质(tho铁矿和尿石)和Hf富含锆石。此外,白云母,石英,长石和某些氧化铁矿物(如磁铁矿),针铁矿和纤铁矿分别代表必需的,脉石和相关矿物。Wadi Al-Baroud矿化伟晶岩的物理升级利用重力和磁选技术进行。为两种分离技术应用最佳条件,可以得到良好的浓缩物,回收率可以接受。因此,最终浓缩物含有〜0.25%U,0.46%Th和0.31%REE,回收率达91.17%U,96.56%Th和86.19%REE,重量占原始样品分析0.02%U的6.58%。 0.04%Th和0.03%REE。因此,强烈建议对最终精矿进行适当的湿法冶金处理以提取其有价值的金属含量。Wadi Al-Baroud矿化伟晶岩的物理升级利用重力和磁选技术进行。为两种分离技术应用最佳条件,可以得到良好的浓缩物,回收率可以接受。因此,最终浓缩物含有〜0.25%U,0.46%Th和0.31%REE,回收率达91.17%U,96.56%Th和86.19%REE,重量占原始样品测定值0.02%U的6.58%, 0.04%Th和0.03%REE。因此,强烈建议对最终精矿进行适当的湿法冶金处理以提取其有价值的金属含量。Wadi Al-Baroud矿化伟晶岩的物理升级利用重力和磁选技术进行。为两种分离技术应用最佳条件,可以得到良好的浓缩物,回收率可以接受。因此,最终浓缩物含有〜0.25%U,0.46%Th和0.31%REE,回收率达91.17%U,96.56%Th和86.19%REE,重量占原始样品测定值0.02%U的6.58%, 0.04%Th和0.03%REE。因此,强烈建议对最终精矿进行适当的湿法冶金处理以提取其有价值的金属含量。因此,最终浓缩物含有〜0.25%U,0.46%Th和0.31%REE,回收率达91.17%U,96.56%Th和86.19%REE,重量占原始样品分析0.02%U的6.58%。 0.04%Th和0.03%REE。因此,强烈建议对最终精矿进行适当的湿法冶金处理以提取其有价值的金属含量。因此,最终浓缩物含有〜0.25%U,0.46%Th和0.31%REE,回收率达91.17%U,96.56%Th和86.19%REE,重量占原始样品分析0.02%U的6.58%。 0.04%Th和0.03%REE。因此,强烈建议对最终精矿进行适当的湿法冶金处理以提取其有价值的金属含量。
更新日期:2020-05-29
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