Selective Reduction of High Alumina-Lateritic Nickel Ore (0.5 Ni-44Fe-16Al2O3)
Abstract
In this present study, the effect of reductant dosage, temperature and holding time on selective reduction process of high alumina-lateritic nickel ore have been investigated clearly. The lateritic nickel ore was reduced with 5 until 15 wt. % anthracite and 10 wt. % sodium sulfate at reduction temperature of 950ºC, 1050ºC and 1150°C for 60, 90, and 120 minutes. Magnetic separation process was then conducted to separate the concentrate and tailing. The analysis of reduced nickel ore is performed by the Atomic Absorption Spectroscopy, X-Ray Diffraction, and Secondary Electron Microscopy. The optimal process resulted from the reduction of nickel ore with 10 wt. % anthracite at the temperature of 1050°C for 120 minutes which resulted in 0.84% nickel in concentrate. The troilite was not found in reduced ore. The iron grade increased along the increased of reduction temperature. The longer of holding time in selective reduction process increased the nickel grade but it decreased the iron grade.
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Li, G., Shi, T, Rao, M., Jiang, T and Zhang, Y. (2012) Benefication of Nickeliferous Laterite by Reduction Roasting in The Presence of Sodium Sulfate, Minerals Engineering, 32, 19-26.
Subagja, R., Firdiyono, F. (2015) Kinetika Reaksi Pelarutan Nikel dari Hasil Reduksi Nikel Laterit, Metalurgi, 30, 71-80.
Kyle, J. (2010) Nickel Laterit Processing Technologies-Where to Next?, Proc. Int. Conf. on ALTA 2010 Nickel/Cobalt/Copper Conference (Perth).
Liu, S. (2008) A Smelting Process of Ferronickel with Nickel Oxide Ore Free of Crystal Water in A Blast Furnace, EP 1 927 667 B1.
Mudd, G.M. (2009) Nickel Sulfide Versus Laterite, The Hard Sustainability Challenge Remains, Proc. Int. Conf. on 48th Annual Conference of Metallurgists (Ontario), 1-10.
Bunjaku, A., Kekkonen, M., Taskinen, P., & Holappa, L. (2011) Thermal Behaviour of Hydrous Nickel–Magnesium Silicates When Heating Up To 750°C, Mineral Processing and Extractive Metallurgy, 120, 139-146.
Elliot, R., Pickles, C.A. and Peacey, J. (2017) Ferronickel Particle Formation during The Carbothermic Reduction of A Limonitic Laterite Ore, Minerals Engineering, 100, 166-176.
Foster, J., Pickles, C.A., Elliot, R. (2016) Microwave Carbhotematic Reduction Roasting of Low Grade Nickeliferous Silicate Laterite Ore, Minerals Engineering, 88, 18-27.
Nurjaman, F., Sa’adah, A., Shofi, A., Apriyana, W. and Suharno, B. (2018) The Effect of Additives and Reductors in Selective Ruduction Process of Laterite Nickel Ore, Jurnal Sains Materi Indonesia, 20, 8-14.
Valix, M. and Cheung, W.H. (2002) Effect of Sulfur on The Mineral Phases of Laterite Ores at High Temperature Reduction, Minerals Engineering, 15, 523-530.
Jiang, M., Sun, T., Liu, N., Kao, J., Liu, N. and Zhang, S. (2013) Mecanism of Sodium Sulfate in Promoting Selective Reduction of Nickel Laterite Ore During Reduction Roasting Process, International Journal of Mineral Processing, 123, 32-38.
DOI: https://doi.org/10.23955/rkl.v14i2.14561
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