الفهرس 
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Abstract
Wadi El Sheih mineralized pegmatite can be considered as a promising target raw material for its rare metal mineralization contents that includes mainly Nb, Ta, Y, U, Th, and REE together with Zr and Hf.
Wadi El Sheih area to be dealt with in the present study is located within Pan-African basement complex in the central part of the Eastern Desert of Egypt. It nearly covers an area about 1.2 km2 and is limited between longitudes 33° 26´ 51´´–33° 28´ 09´´ E and latitudes 26° 37´ 58´´–26° 38´ 11´´ N. The mapped area is occupied by older (gray) granite, felsite dykes and ending with the latest pegmatite rocks. Uncommon presence of rare-metal mineralization is recorded in the mineralized pegmatite in Wadi El Sheih older granitoids. The studied mineralization was found as distinguishable megascopic crystals of economic minerals scattered within the pegmatitic bodies. Detailed mineralogical and chemical investigation were carried out using microscopic examinations, x-ray diffraction (XRD), scanning electron microscope (SEM) providing with energy-dispersive spectrometer (EDS) and x-ray fluorescence (XRF). The mineralogical studies revealed the presence of 7.59% by mass heavy economic polymetallic minerals such as euxenite-(Y), fergusonite-(Y), allanite-(Ce), and xenotime-(Y), in addition to uranothorite and zircon.
Physical upgrading processes of Wadi El Sheih mineralized pegmatite is an important. It were carried out to produce high grade mineral concentrate used as a raw material for chemical treatment to extract the economic elements content that necessary for several industries.
This thesis investigate the use of high intensity magnetic separator (HIMS) in conjunction with gravity pre-concentration steps via shaking table concentrator; to recover rare-metals and rare earth bearing mineralization of Wadi El Sheih pegmatitic granitoid sample and eliminate the undesired associated gangue minerals. The results of magnetic separation are related to the magnetic susceptibilities measurements of pure single crystal minerals using vibrating sample magnetometer (VSM) instruments.
Applying the optimum conditions for both separation techniques, it is possible to attain a good magnetic concentrate containing about 63.63% by mass heavy minerals with a final recovery of 78.20% in a mass of 8.55% out of deslimed original feed sample (-1000+45 μm) assay 7.38% heavy minerals.