Nuryadi Saleh, Nngurah Ardha



This study investigates the effectiveness of magnetic concentration techniques for the beneficiation of borehole samples of Arasuko - West Sumatera iron ore. It is a low-grade type of ore sample (±35% Fe) with high silica and calcium content (±36%). Based on the fact, that there are appreciable differences in magnetic susceptibility between the desired iron minerals and the gangue minerals, hence, it was suggested that multi-stages magnetic separation may be useful to concentrate this type of ore. Because of the fine dissemination of the iron minerals and the most abundant gangue mineral, the particles size of ore was set at 80% passing 150 meshes. Rougher tests of magnetic separation produced concentrates with iron content of about 58.2% Fe; the tailing of rougher stage was then scavenged using higher magnetic intensity. Further, the rough and scavenged concentrates were mixed and fed into a cleaner stage with low magnetic intensity. Results indicate that the final iron concen- trate assaying of 68.1% Fe at a recovery of about 80% is achieved and reckoned as an iron premium-grade concentrate.


iron ore, beneficiation, magnetic separation, iron concentrate

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Ahmed A.S., Seifelnassr, Moslim E.M., and Abouzeid A.Z.M., 2012. Effective processing of low-grade iron ore through gravity and magnetic separation techniques,Physicochem. Probl.Miner. Process.48(2), p. 567−578.

Al-Wakeel, M.I. and Abdel-Rahman, M.K., 2005. Beneficiation of low grade Ghorabi iron ore, The Journal of Ore Dressing, Vol.7, Issue 13, p.1-6.

Armin T, 2014. Bijih besi untuk smelter sendiri, Geomagz, Badan Geologi, http//,

browshed 27 Dec. 2014.

Das B, Prakash S., Das S.K. and Reddy P.S.R., 2007. Effective beneficiation of low grade iron ore through jigging operation, Journal of Minerals & Materials Characterization & Engineering, Vol. 7, No.1, pp 27-37.

Dworzanowski, M., 2012. Maximizing the recovery of fine iron ore using magnetic separation, J.South African Inst. Min.Metall., Vol.112, No.3, March.

Karmazin V.V, Bikbov M.A., and Bikbov A.A., 2002. The energy saving technology of beneficiation of iron ore, Magnetic and Electrical Separation, Vol. 11(4), pp. 211-224.

Outotec, 2013. SLon® vertically pulsating high-gradient magnetic separator, Brochure,, browshed 17 August 2014.

Reade C., 2006. Magnetic properties and susceptibilities charts, Reade Advanced Materials,, browshed 27/01/2015.

Sharma J.,and Sharma T., 2014. Beneficiation of low grade iron ore fines by magnetizing roasting, Int. J. Engineering. Research.& Science.& Technology, Vol. 3, No. 2, May, p.59-64.

Umadevi T., Singh A. Pratap, Abhishek K, Suresh B, Rameshwar S, 2013. Recovery of iron bearing minerals from beneficiation plant 2 thickener underflow of JSW Steel Limited, Journal of Minerals and Materials Characterization and Engineering, 1, p.55-60.

Wills A. Barry, 2007, Wills’ Mineral Processing Technology: an introduction to the practical aspects of ore treatment and mineral recovery, 7th edition, NapierMunn T (editor), Elsevier, Sydney, pp.353-365.


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