Recovery of uranium and rare earth elements from fluorite –bearing alteration zones in younger granites of El Missikat area, Central Eastern Desert, Egypt
Mahmoud Sayed Mahmoud Khalafalla;
Abstract
The sample under study was collected from El Missikat area. El-Missikat lies in the Eastern Desert of Egypt, 85 km from Qena along the river Nile. El Missikat younger granite rich with fluorine and high HREE enrichment relative to LREE.
Fluorite (CaF2) has a widespread occurrence as a common mineral ore deposits. It displays a considerable colour variation in colour from violet, deep green to black colour. The deep green fluorite contains Yb2O3 and Y2O3. Highly radioactive fluorite- bearing granite in EL-Missikat occurs as blue to violet crystals due to the presence of U and in crystal lattice of the fluorite. The aim of the present work is to study fluorine deactivation and dissolution some metal values from El Missikat ore and study the factors affecting fluorine deactivation process to obtain the most effective conditions for solubilization and extraction of some economic elements namely; U, REE(Y) and Cd. For this purpose, a representative sample of El Missikat younger granite ore material was collected. Its chemical analysis showed the presence of 0.615% REE, 0.045% cadmium, 0.16% uranium and 20.2% fluoride. The mineralogical analysis of the sample under study revealed that it contains Fluorite (CaF2), Yttrium Fluorite (Ca, Y)F2, quartz(SiO2), and Musecovite (K, Na) (Al, Mg, Fe,)2 (Si3 Al)O 10 (OH) 2 .
The conventional methods (acid or alkali leaching) for extracting REE, and U ores from fluorite–bearing have disadvantages due to serious environmental
Fluorite (CaF2) has a widespread occurrence as a common mineral ore deposits. It displays a considerable colour variation in colour from violet, deep green to black colour. The deep green fluorite contains Yb2O3 and Y2O3. Highly radioactive fluorite- bearing granite in EL-Missikat occurs as blue to violet crystals due to the presence of U and in crystal lattice of the fluorite. The aim of the present work is to study fluorine deactivation and dissolution some metal values from El Missikat ore and study the factors affecting fluorine deactivation process to obtain the most effective conditions for solubilization and extraction of some economic elements namely; U, REE(Y) and Cd. For this purpose, a representative sample of El Missikat younger granite ore material was collected. Its chemical analysis showed the presence of 0.615% REE, 0.045% cadmium, 0.16% uranium and 20.2% fluoride. The mineralogical analysis of the sample under study revealed that it contains Fluorite (CaF2), Yttrium Fluorite (Ca, Y)F2, quartz(SiO2), and Musecovite (K, Na) (Al, Mg, Fe,)2 (Si3 Al)O 10 (OH) 2 .
The conventional methods (acid or alkali leaching) for extracting REE, and U ores from fluorite–bearing have disadvantages due to serious environmental
Other data
| Title | Recovery of uranium and rare earth elements from fluorite –bearing alteration zones in younger granites of El Missikat area, Central Eastern Desert, Egypt | Authors | Mahmoud Sayed Mahmoud Khalafalla | Issue Date | 2017 |
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