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Egyptian beach ilmenite occurs in a relatively high content in the naturally highly concentrated superficial black sand deposits at specific beach zones in the northern parts of the Nile Delta at Rosetta.Microscopic study shows that the ilmenite occurs as fresh homogeneous black or heterogeneous multicoloured altered grains and exhibits three types(homogeneous,exsolved and altered) of ilmenite varieties.XRD data of ilmenite indicates their association with minor hematite and quartz,whereas leucoxene shows its association with Nb-rutile,pseudorutile and hematite.Grain size distribution suggests a very fine sand size of >89%and 80%and a fine sand size of 10.5%and 18.3%for fresh and altered ilmenites,respectively.The density of fresh,altered ilmenite and leucoxene concentrates varies from 2.70,2.50 to 2.40 ton/m~3,suggesting a gradual decrease from high grade fresh to leucoxene and consistent with variation in magnetic susceptibility as a consequence of the leaching of iron.Mass magnetic susceptibility reveals 97.6%of ilmenite and 92%of the altered form are obtained at0.20 and 0.48 ampere.Fresh ilmenite exhibits variable TiO_2(47.18%) and Fe_2O_3~T(46.10%) with minor MnO,MgO and Cr_2O_3(1.22,1.10 and 0.51%).The altered ilmenite is higher in TiO_2(76.16%) and SiO_2(4.68%) and lower in Fe_2O_3~T(14.45%),MnO,MgO and Cr_2O_3(0.39,0.52 and 0.11%) compared with the fresh form.Three concentrates of ilmenites(G1,G2 and G3) were prepared from crude ore using a Reading cross belt magnetic separator under different conditions,revealing a gradual increase of TiO_2,SiO_2,Al_2O_3 and CaO accompanied by a decrease of Fe_2O_3~T,MgO and Cr_2O_3 with repetition of the separation processes.Several ore dressing techniques were carried out to upgrade the ilmenite concentrate.
Egyptian beach ilmenite occurs in a relatively high content in the naturally highly concentrated superficial black sand deposits at specific beach zones in the northern parts of the Nile Delta at Rosetta. Microscopic study shows that the ilmenite occurs as fresh homogeneous black or heterogeneous multicolored altered grains and exhibits three types (homogeneous, exsolved and altered) of ilmenite varieties. XRD data of ilmenite indicates their association with minor hematite and quartz, whereas leucoxene shows its association with Nb-rutile, pseudorutile and hematite. Grain size distribution suggests a very fine sand size of> 89% and 80% and a fine sand size of 10.5% and 18.3% for fresh and altered ilmenites, respectively. The density of fresh, altered ilmenite and leucoxene concentrates varies from 2.70, 2.50 to 2.40 ton / m ~ 3, suggesting a gradual decrease from high grade fresh to leucoxene and consistent with variation in magnetic susceptibility as a consequence of the leaching of iron. Mass magnetic The susceptibility reveals that 97.6% of ilmenite and 92% of the altered form are obtained at 0.20 and 0.48 ampere. Fresh ilmenite exhibits variable TiO 2 (47.18%) and Fe 2 O 3 ~ T (46.10%) with minor MnO, MgO and Cr 2 O 3 (1.22, 1.10 and 0.51%). The altered ilmenite is higher in TiO 2 (76.16%) and SiO 2 (4.68%) and lower in Fe 2 O 3 ~ T (14.45%), MnO, MgO and Cr 2 O 3 (0.39,0.52 and 0.11% form.Three concentrates of ilmenites (G1, G2 and G3) were prepared from crude ore using a Reading cross belt magnetic separator under different conditions, revealing a gradual increase of TiO_2, SiO_2, Al_2O_3 and CaO accompanied by a decrease of Fe_2O_3 ~ T, MgO and Cr 2 O 3 with repetition of the separation processes. Seeding ore dressing techniques were carried out to upgrade the ilmenite concentrate.