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Abstract

The Ghorabi iron ore is composed mainly of goethite, hematite and quartz minerals. Chemically, four-fifths of the ore (80·65%) are iron oxides (44·10%, 34·30%Fe) and silica (36·81%). The size distribution of the ore indicates that iron is concentrated in the fine fraction (>38% in fraction −53 μm) while silica is concentrated in the coarse fraction (>40% in fraction +53 μm). Conditioning of the ore with sodium silicate increases the iron and therefore reduces the silica in the fine fraction (−53 μm), and attritioning increases the fines (−53 μm) from 24 to 40·78% and iron from 38·64 to 46·20% in the fine fraction. In the present study the ore beneficiation is conducted by screening, attritioning, classification and magnetic separation. In the flowsheet, the optimised conditions are considered. The flowsheet includes crushing, grinding, attritioning with sodium silicate and screening into two size fractions, coarse −250+53 μm and fine −53 μm. The coarse fraction (+53 μm) is subjected to dry, low intensity magnetic separation, while the fine fraction is passed to a hydrocyclone. The overflow is rich in iron but the underflow is subjected to wet, high intensity magnetic separation. The final concentrate is represented by the magnetic fractions in addition to the hydrocyclone overflow, while the tail is represented by the non-magnetic fractions. The obtained concentrate is of high grade (53·22%Fe) and good recovery (83·00%) and suitable for blast furnace.

Keywords

EGYPT BAHARIYA OASIS GHORABI IRON ORE ATTRITION CLASSIFICATION MAGNETIC SEPARATION

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References

Abdel-Rahim,

F. H

. (1999), ‘Dual concentrate from an Egyptian baritic iron ore’, Proceedings of the 6th Mining, Petroleum and Metallurgy Conference, Vol. 1, 193-212, Faculty of Engineering, Cairo University, Cairo, Egypt.

Abouzeid,

M. A

. (1967), ‘A contribution to the study and beneficiation of El-Gedida iron ore’, MSc Thesis, Faculty of Engineering, Cairo University, Cairo, Egypt, p. 115.

Afia,

M. S

. (2004), ‘Metallic ores in Egypt: Resources, uses and needs; economic view’, Symposium of Mineral Wealth and Development in Egypt, (5), p. 10, Al-Azhar University and Egyptian Society for Mining Services, Cairo, Egypt.

Anonymovs (1996), ‘Annual project survey’, E & MJ, Vol. 175, p. 140.

Bolous,

T. R.

, Estefan,

S. F.

and Arafa,

M. A

. (1967), Trans. Iron Steel, Vol. 16, pp. 183–5.

El-Aref,

M. M.

, Mesaed,

A. A.

and Salama,

W. S

. (2005), ‘Stratigraphic setting, facies analysis and depositional environ-ments of the Lutetian ironstones of Gabal Ghorabi mine area, El-Bahariya Depression, Western Desert, Egypt’,Proceedings of the 43rd Scientific Conference, December 2005, The Geological Society of Egypt, Cairo.

Farghaly,

M. G

. (2002), ‘Beneficiation process of El-Bahariya iron ore’, MSc Thesis, Faculty of Engineering, Assiut University, Assiut.

Healy,

T. W

. (1979), ‘Principles of dispersion and aggregation of mineral fines’, in Somasundaran,

and Arbiter,

(eds.), Beneficiation of Mineral Fines; Problems and Research Needs, New York, AIME, pp. 161–178.

Horace,

T. R.

and Francis,

E. B

. (1973), Washing of Mesabi Iron Concentrates, US Bureau of Mines, Washington, DC, USA.

10.

Kassem,

M. E.

, Mabrouk,

S. A.

and Ahmed,

A. A

. (1978), ‘A contribution of the up-grading of El-Gedida iron ore by magnetic separation’, Proc. 2nd Metallurgical Conf., El-Tabbin Institute For Metallurgical Studies, Cairo, Egypt, December 1978.

11.

Nigm,

A. M

. (1967), ‘Some problems about the concentration of the iron of El-Bahariya Oasis’, MSc Thesis, Faculty of Engineering, Assiut University, Assiut, p. 120.

12.

Said,

and Issawi,

. (1965), ‘Geology of northern plateau, Bahariya Oasis, Egypt’, Geol. Surv., p. 41.

13.

Song,

, Lu,

and Lopez-Valdivieso,

. (2002), ‘Magnetic separation of hematite and limonite fines as hydrophobic flocs from iron ores’, Miner. Eng., Vol. 15, No. 6, pp. 415–422.

14.

Svoboda,

and Fujita,

. (2003), ‘Recent developments in magnetic methods of material separation’, Miner. Eng., Vol. 16, pp. 785–792.

15.

Uys,

and Bradford,

W. H

. (1981), ‘The beneficiation of iron ore by heavy media separation’, Metal Bulletin's,Proceedings of the 2nd International Iron Ore Symposium, Frankfurt, Germany, 235–248.

16.

Wasel,

M. B

., Shaker and Taha,

(1978), Beneficiation of El-Gedida iron ore by high intensity magnetic separation’, Proc. 2nd Metallurgical Conf., El-Tabbin Institute for Metallurgical Studies, Cairo, Egypt, December 1978, 87–108.

17.

Youseef,

A. A.

and Bibawy,

T. A

. (1978), ‘Flotation of high sulphur Egyptian iron ore’, Proc. 2nd Metallurgical Conf., El-Tabbin Institute for Metallurgical Studies, Cairo, Egypt, December 1978, 231–250.

Beneficiation of low grade Ghorabi iron ore,Bahariya Oasis,Egypt: a case study

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