.png)
Email this article Peningkatan Kadar Nikel Dalam Laterit Jenis Limonit Dengan Cara Peletasi, Pemanggangan Reduksi Dan Pemisahan Magnet Campuran Bijih, Batu Bara, Dan Na2SO4 [Upgrading of Nickel Content in The Limonitic Laterite Ores by Pelletizing, Reduction Roasting and Magnetic Separation of The Mixed Ores, Coal and Sodium Sulphate]
Abstract
In Indonesia, laterite nickle ore that is low grade nickel (<1.5%) has not been used well because it is not considered beneficial. At present work, the experiment to increase nickel grade in the limonitic type of laterite ores has been caried out by pelletizing a limonitic type of laterite ores, coal and Na2SO4 mixture, it was followed with reduction roasting of pellet in muffle furnace at temperatues 800 ºC to 1100 ºC and reduction roasting time from 0,5 hours to 4 hours. The reduced ore from reduction roasting process was grounded in vibrating mill, then mixed with water and passed to magnetic separator to separate nickel concentrates from the tailing. The concentrate with 10.28% of nickel grade and 66,57% of iron grade was produced from hour, 10 % of coal addition and 20% of Na2SO4 addition with recovery of nickel and iron in the consentrate 64,77% and 34,66% respectively.
Abstrak
Pada penelitian ini telah dilakukan percobaan untuk meningkatkan kadar nikel dalam bijih nikel laterit jenis limonit dengan cara membuat pelet dari campuran bijih nikel laterit jenis limonit, batubara dan natrium sulfat, dilanjutkan dengan pemanggangan reduksi pelet dalam tungku mufle pada temperatur 800 0 C sampai dengan 1100 o C dan waktu pemanggangan reduksi dari 0,5 jam sampai dengan 4 jam. Kalsin yang dihasilkan dari proses pemanggangan kemudian digiling dalam vibrating mill untuk selanjutnya dicampur dengan air dan dilewatkan kedalam alat pemisah magnet sehingga dihasilkan konsentrat dan tailing. Konsentrat dengan kadar nikel 10,28 % dan kadar besi 66,57 % diperoleh dari kalsin hasil proses pemanggangan reduksi pada temperatur 1000 o C selama 1 jam, penambahan batubara 10 % dan penambahan natrium sulfat 20 %, dimana perolehan nikel dan besi dalam konsentrat masing masing adalah 64,77 % dan 34,66 %
Keywords
Full Text:
PDF (Bahasa Indonesia)References
C.A. Pickles , J. Forster, R. Elliott , 2014, Thermodynamic analysis of the carbothermic reduction roasting of a nickeliferous limonitic laterite ore, Minerals Engineering, 65, 33–40
Departemen Pertambangan dan Energi, 1998, Potensi dan Prospek Investasi di Sektor Pertambangna dan Energi 1998-1999.
Peta Ekonomi Mineral, (1997) Dit. Sumber daya Mineral, Kementerian Energi dan sumberdaya Mineral Republik Indonesia
Dalvi, A.D., Bacon, W.G., Osborne, R.C., 2004. The past and the future of nickel laterites, PDAC 2004 International Convention. Trade Show & Investors Exchange, North Carolina, USA 1–27
Mskalyk, R.R., Alfantazi, A.M., 2002. Nickel laterite processing and electrowinning practice. Miner. Eng. 20 (15), 593–595.
Rhamdhani, M.A., Hayes, P.C., Jak, E., 2009. Nickel laterite Part 1 – microstructure and phase characterizations during reduction roasting and leaching. Miner. Process. Extr. Metall. Rev. 3 (118), 129–145.
Mudd, G., 2010. Global trends and issues in nickel mining: sulfides versus laterites. Ore Geol. Rev. 38, 9–26.dan literatur Eckelman, M., 2010. Facility-level energy and greenhouse gas life-cycle assessment of the global nickel industry. Resour. Conserv. Recycl. 54, 256–266.
Bergman, R. A. 2003. Nickel production from low-iron laterite ores: process descriptions, CIM Bulletin, 96, (1072), 127–138.
Cartman, R. 2010. An overview of the future production and demand of ferronickel, 2nd Euro Nickel Conference, (IMM Informa Australia), Available: http://www.hatch.com.au/Mining_Metals/Iron_Steel/ Articles/documents/Future_supply_demand_ferronickel.pdf.
Rudi Subagja, F. Firdiyono, 2015, Kinetika reaksi pelarutan nikel dari kalsin nikel laterit, Metalurgi Vol. 30, No. 2, Agustus, hal. 71-80.
Kim, J., Dodbiba, G., Tanno, H., Okaya, K., Matsuo, S., Fujita, T., 2010. Calcinations of low-grade laterite for concentration of Ni by magnetic separation. Miner. Eng. 23(4), 282–288.
Li, G.H., Shi, T.M., Rao,M.J., Kiang, T., Zhang, Y.B., 2012, Beneficiation of nickeliferous laterite by reduction roasting in the presence of sodium sulfate. Miner. Eng. 32, 19–26
Cao, Z.C., Sun, T.C., Yang, H.F., Wang, J.J., Wu, X.D., 2010. Recovery of iron and nickel from nickel laterite ore by direct reduction roasting and magnetic separation. J. Univ. Sci. Technol. Beijing 32 (6), 708–712.
Zhu, D.Q., Cui, Y., Vining, K., Hapugoda, S., Douglas, J., Pan, J., Zheng, G.L., 2012. Upgrading low nickel content laterite ores using selective reduction followed by magnetic separation. Int. J. Miner. Process. 106–109, 1–7.
Rudi Subagja, Agus B.P, Mayang, 2015, Pengaruh temperatur dan waktu reduksi serta penambahan batubara dan Na2SO4 terhadapt peningkatan kadar nikel dalam nikel laterit, prosiding seminar material metalurgi 2015
J. Forster, C.A. Pickles , R. Elliott, 2016, Microwave carbothermic reduction roasting of a low grade nickeliferous silicate laterite ore, Minerals Engineering, 88 hal 18–27
Bunjaku, A., Kekkonen, M., Holappa, L.T., 2010. Phenomena in thermal treatment of lateritic nickel ores up to 1300 o C. Pada: The Twelfth International Ferroalloys Congress Sustainable Future. Helsinki, Finland, hal. 641–652.
Jie Lu , Shoujun Liu , Ju Shangguan , Wenguang Du , Feng Pan , Song Yang , 2013, The effect of sodium sulphate on the hydrogen reduction process of nickel laterite ore, Minerals Engineering, 49 hal 154-164
Man Jiang, Tichang Sun, Zhiguo Liu, Jue Kou , Na Liu , Shiyuan Zhang , 2013, Mechanism of sodium sulfate in promoting selective reduction of nickel laterite ore during reduction roasting process,International Journal of Mineral Processing, 123, hal 32–38.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Refbacks
- There are currently no refbacks.
