Investigation of Efficiency of Magnetic Separation Methods for Processing of Low-Grade Iron Pigments Ore (RED Ochre)
International Journal of Mineral Processing and Extractive Metallurgy
Volume 4, Issue 1, March 2019, Pages: 18-25
Received: Mar. 7, 2019;
Accepted: Apr. 13, 2019;
Published: May 15, 2019
Views 311 Downloads 49
Seyed Hamzeh Amiri, School of Mining Engineering, University of Tehran, Tehran, Iran
In this research, the efficiency of magnetic separation methods for processing of a low-grade iron pigments ore (red ochre) has been studied. Based on the mineralogical analyses (XRD), thin section and polish studies, the reserve is an iron sedimentary deposit with an average Fe grade of %31.3. The most valuable minerals are Hematite and Goethite and main gangue minerals are Calcite and Quartz. Wet and dry high-intensity magnetic separation methods were applied for processing. The full factorial design was implemented for all of the wet high-intensity magnetic separation (WHIMS) experiments. Factors of magnetic field intensity, rotor speed and feed water flowrate were considered for design. In optimal conditions in rougher stage, WHIMS produced a concentrate with grade %42.92 Fe and recovery %62.23 in magnetic field intensity 1.7 Tesla, feed water flowrate 5 liter per minute and speed of rotor 3 rounds per minute; also after two stage cleaning WHIMS produced a concentrate with Fe grade and Fe recovery of %56.12 and %38.56, respectively. The results of the dry high-intensity magnetic separation for the two coarser fractions showed that size fraction of coarser than 1000 micron produced a concentrate with Fe grade %40.32 and relative Fe recovery %95.11 and size fraction of -1000+150 micron with Fe grade %45. 04 and relative Fe recovery %75.14. The results of experiments show that there is a low capability for improving quality and grade of this ore. Achieved concentrate from experiments could be used as an initial feed of producing pigment.
Seyed Hamzeh Amiri,
Investigation of Efficiency of Magnetic Separation Methods for Processing of Low-Grade Iron Pigments Ore (RED Ochre), International Journal of Mineral Processing and Extractive Metallurgy.
Vol. 4, No. 1,
2019, pp. 18-25.
Jafarzaden, A. G., Geology of Iran, iron deposits. Tehran: Geological survey and mineral explorations Country, Iran, 1996.
Kogel J. E., Trivedi N. C., Barker J. M., Krukowski S. T., Industrial Minerals & Rocks: Commodities, Markets, and Uses, SME. USA, 2006.
Salehi, A., Mehmanavazan, D., Eshghabadi, D, Prospecting and exploration report of red ochre in Central Iran. Tehran: Geological survey and mineral explorations Country, Iran, 1989.
Karimpour, M. Industrial minerals and rocks, University of Ferdowsi press, Iran, 2007.
Svoboda J., Fujita T., Recent developments in magnetic methods of material separation, Minerals Engineering, 2003, 16, 785-792.
Singh, R. M. Beneficiation of iron ores for iron & steelmaking. Steel Technology, 2007.
Rath, R. K., Gravity concentration of iron ores. Advanced Gravity Separation, 2007.
Rath, R. K., Beneficiation response of a low grade iron ore from eastern India for the production of sinter and pellet feed. Proceedings of the XI International Mineral Processing Technology, New Dehli, 2010, 179-185.
Jyoti, D. R, Beneficiation of a finely disseminated low-grade iron ore by froth flotation. Proceedings of the XI International Mineral Processing Technology, New Dehli, 2010, 590-596.
Liqun, L. S., Recovering limonite from Australia iron ores by flocculation high intensity magnetic separation. Journal of Central South University, 2005, 682-687.
Anderson, M. J., DOE Simplified: Practical Tools for Effective Experimentation. Productivity Press, 2007.
Mehrabani, J. V., Process optimization and modelling of sphalerite flotation from a low-grade Zn-Pb ore using response surface methodology. Journal of Separation and Purification Technology, 2010, 242-249.
Wills BA. Mineral processing technology – an introduction to the practical aspects of ore treatment and mineral recovery.5th ed. Cornwall, UK: Camborne School of Mines, 1992.
Pedro D. D., Guilherme B. C., Margarida M. Fe. L., Rosa M. F. L., Characterization and magnetic concentration of an iron ore tailings, Journal of Materials Research and Technology, 2018.
Al-Wakeel M. I., Abd El-Rahman M. K., Beneficiation of low grade Ghorabi iron ore, Bahariya Oasis, Egypt: A case study, Mineral Processing and Extractive Metallurgy IMM Transactions Section C, 2006, 115, 177-182.
Chen L., Xiong D., Huang H., Pulsating high-gradient magnetic separation of fine hematite from tailings, 2009, 26, 163-168.
Yu J., Han Y., Li Y., Gao P., Separation and recovery of iron from a low-grade carbonate-bearing iron ore using magnetizing roasting followed by magnetic separation, 2017, 52, 1768-1774.
Araujo AC, Amarante SC, Souza CC, Silva RRR. Ore mineralogy and its relevance for selection of concentration methods in processing of Brazilian iron ores. Min Proc. Ext. Metall. (Trans Inst. Mineral Metall. C), 2003,112, 44–64.