Mineralogical Characteristics of the Separated Magnetic Rutile of the Egyptian Black Sands

Moustafa, Mohamed I.

doi:10.1111/j.1751-3928.2010.00130.x

Cited by 16 publications

(9 citation statements)

References 7 publications

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“…Using the differences in physical characters, each of the six individual economic minerals can be obtained in a high‐purity mineral concentrate (Moustafa, 2003, 2010; Moustafa & Abdelfattah, 2010).…”

Section: Methodsmentioning

confidence: 99%

Chemistry and Origin of Enigmatic Monazite and Chevkinite/Perrierite in the Egyptian Black Beach Sand

Moustafa

2010

Resource Geology

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The content of monazite in the Egyptian black beach sand and coastal sand dunes is normally equal to or below 0.01 wt.%. The obtained high grade monazite concentrate includes three minor monazite groups in addition to major canary and lemon yellow coloured monazite: (i) the colourless to pinkish white coloured monazite; (ii) the opaque light to dark resinous, reddish brown and dark brown coloured monazite; and (iii) opaque yellowish red to brownish red coloured monazite grains group. These groups represent 3%, 4% and 2%, respectively, in the high grade monazite concentrate. A negligible amount of euhedral to subhedral black to brownish black chevkinite/perrierite mineral crystals was detected in the obtained monazite concentrate. The presence of these minor mineral groups affects the chemical composition of the obtained high grade monazite concentrate.The Ce 2O3 is the main REE in the studied monazite. In the colourless-pinkish monazite grains, the analyzed REE are the following, in order of abundance; Ce > La > Nd > Pr > Sm > Gd > Dy. UO2 ranges between 0.11 and 1.74 wt.%. The contents of Eu2O3 is under the limit of detection while ThO2 ranges between 3.99 and 8.58 wt.% with an average value of 5.57 wt.%. These grains are most probably igneous monazite from a highly differentiated granite.The resinous, brown monazite grains have lower Ce 2O3 content (24.63 wt.%) and much lower La2O3 content (6.00 wt.%) but greater content of Eu2O3 (0.41 wt.%) than those of the colourless-pinkish monazite. These monazites have the lowest contents of Th, U and Ca among the three groups. The resinous, brown monazites are most probably formed by metamorphism or alteration leading to leaching or replacement of pre-existing minerals.The red monazite group has a lower average Ce 2O3 content (25.28 wt.%) than the colourless-pinkish variety (28.02 wt.%) but slightly greater than that of the resinous, brown ones. The red monazite group has the highest ThO 2 and UO2 contents; 5.84 wt.% and 1.24 wt.%, respectively. It has the lowest monazite component mole fraction (0.75). The red monazite seems to have been formed by hydrothermal alteration of pre-existing monazite and other mineral species bearing for Y, REE, Ca, Th and U.The , are obvious in the studied colourless-pink monazite.

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Section: Methodsmentioning

confidence: 99%

Chemistry and Origin of Enigmatic Monazite and Chevkinite/Perrierite in the Egyptian Black Beach Sand

Moustafa

2010

Resource Geology

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“…Rutile is considered one of the exceedingly significant minerals in these black sands. Most of the individual economic minerals from the Egyptian black sands, including rutile, can be obtained with marketable grades and accepted recoveries by using different low-cost and simple techniques, such as wet-gravity concentration, and magnetic separation techniques 25 . So, rutile ore extracted from black sand minerals is strongly approved to be the main source of titanium dioxide ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…According to variety of problems result from the manufacture of pure titanium dioxide involving high energy cost, consumption of hazardous chemicals, production of plenty amounts of hazardous gases, acidic emissions along with wastes, which could cause considerable harm to the environment. Rutile ore is strongly suggested to be directly used in several industries 24 , 25 . So that the main target of this work is synthesis of high temperature industrial ceramic materials with optimized thermal and mechanical properties with low cost and environmental friendly method.…”

Section: Introductionmentioning

confidence: 99%

Processing of high temperature alumina/aluminum titanate ceramic composites from clean sources

Besisa

Ewais

2022

Sci Rep

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Producing new technological materials with high performance from clean sources has become a global requirement. Alumina/aluminum titanate (Al2O3/Al2TiO5) composites are high-temperature portentous materials used in various advanced applications. In this work, different Al2O3/Al2TiO5 composites were obtained with high thermal and mechanical properties for high-temperature applications by a low-cost process. The targeted composites were produced from calcined alumina and, rutile ore extracted from the Egyptian black sands by pressureless sintering at a temperature of 1650 °C/2 h. Rutile was added to alumina with a different content (0–40 wt%) to promote its sinterability and thermo-mechanical response. Evaluation of the produced composites in terms of phase composition, densification, microstructural features, mechanical and thermal properties was investigated. The results indicated that the addition of small amounts of rutile (10 and 20 wt%) succeeded in forming a stable Al2O3/Al2TiO5 composite structure. However, higher content of rutile led to the formation of Al2TiO5 rich matrix composites. Moreover, highly dense composites with harmonic microstructure and enhanced mechanical strength were attained by increasing the rutile content. The composite with only 10 wt% rutile addition gave the highest density of 3.6 g/cm3 and the highest cold crushing strength and modulus of rupture values of 488.73 MPa and 106.19 MPa, respectively. Notably, the addition of rutile has a substantial effect on promoting the thermal properties and thermal stability of the obtained composites up to a high temperature of 1400 °C. The present study shows that addition of rutile ore to alumina is one economical way of improving the densification and thermal expansion of Al2O3 for high temperature applications. Using a clean source such as rutile ore that contains some thermal stabilizers as Fe2O3, Al2O3, SiO2, ZrO2, and MgO instead of pure TiO2 has played a noticeable role in improving the reaction sintering and resulting in a highly qualified material. Thus, sintered Al2O3/Al2TiO5 composites can be considered as a promising high-temperature material for advanced applications.

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“…The mineralogy of the Egyptian black sands was studied previously by many workers. The most recent of which are Dabbour (1994Dabbour ( ,1997, Dewedar (1997), Moustafa (1999), El-Nahas (2002), Barakat (2004), Abu Halawa (2005), Abdel Fattah (2008, Abu Diab (2008), Moustafa (2007Moustafa ( , 2009Moustafa ( , 2010 and El-Shafey (2011).…”

Section: Introductionmentioning

confidence: 99%

Evaluation, Radioactivity and Mechanical Analysis of the Top Meter Black Sands North East of Motobas Industerial Sector, Kafr Al-Sheikh Governorate, Egypt.

El-Afandy

Moustafa

Nahas

et al. 2015

Al-Azhar Bulletin of Science

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The coastal plain of study area covered by sea water rich in fines derived from the clay lenses of the continental shelf by erosion process comprises three zones; eastern, middle and western. So, the high content of fines varies from 0.72 % to 74.08 with an average of 18%. The apparent specific gravity of topmost part of the sands one meter thick varies from 1.29 g/cm³ to 1.74 g/cm³ with an average of 1.59 g/cm³. The studied sediments are derived from river environment, due to the high content of clay and organic matter in the raw sands. The average percentage of sand fraction finer than 125 micron has an average value of 19.51 %, in which the total heavy fractions constitutes 92.78 % in average of its total amounts. The calculated total reserve of the economic heavy minerals reaches up to 578,760 tons separated from 2893.800 tons bulk sands. Its mineral constituents are; 182,850 tons magnetite, 329,130 tons ilmenite, 23,850 tons garnet, 14,310 tons leucoxene, 20,670 tons zircon, 6,996 tons rutile and 954 tons monazite. The radiometric measurements of the study area revealed that the western zone which occupies four square kilometers have high values of specific activity, absorbed and effective doses because of its high contents of monazite and radioactive zircon, while the eastern and middle zones each occupy three square kilometers posses a moderate to low values of these activities respectively. Therefore, the the western zone is not recommended as building materials because of its relatively high radioactivity. Meanwhile, sands of the middle and eastern zones are recommended for the same target, after separation the economic and strategic minerals of strategic importance.

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Mineralogical Characteristics of the Separated Magnetic Rutile of the Egyptian Black Sands

Cited by 16 publications

References 7 publications

Chemistry and Origin of Enigmatic Monazite and Chevkinite/Perrierite in the Egyptian Black Beach Sand

Chemistry and Origin of Enigmatic Monazite and Chevkinite/Perrierite in the Egyptian Black Beach Sand

Processing of high temperature alumina/aluminum titanate ceramic composites from clean sources

Evaluation, Radioactivity and Mechanical Analysis of the Top Meter Black Sands North East of Motobas Industerial Sector, Kafr Al-Sheikh Governorate, Egypt.

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