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Research article

Vol 13 No 1 (2019): Volume 13, Number 1, 2019

Pelarutan emas pada pelindian konsentrat emas hasil roasting menggunakan reagen tiosianat

DOI
https://doi.org/10.22146/jrekpros.41519
Submitted
November 16, 2023
Published
June 30, 2019

Abstract

Dissolution of gold from roasting concentrate of gold ore using potassium thiocyanate with the presence of ferric chloride as an oxidizer was investigated. The concentrate was taken from Lengkukai gold mine. Gold ore particles under 53 µm in size were roasted at varied temperature, separated using wet magnetic separator, and finally leached. The X-ray diffraction (XRD) analysis showed that there were phase changes after roasting with the emergence of new phases such as hematite, pyrrhotite, and almandine. Leaching of gold concentrate after roasting and magnetic separation showed that gold was in non-magnetic concentrate at 950oC with the highest gold dissolution of 0.95 mg/L, while magnet concentrate was completely absent. Experiments with the addition of Fe3+ ion oxidizers for 24-hour range did not have significant effect on gold dissolution. The highest gold concentration obtained of 2.29 mg/L was obtained at 12 hours with 0.1 M FeCl3. The increase of thiocyanate reagent concentrations, which showed a linear correlation to gold dissolution, produced up to 2.25 mg/L of gold concentration (12 hours at 0.3 M KSCN).

References

  1. Adams, M., 2015, Advances in Gold Ore Processing, Mutis Liber Pty Ltd., Western Australia
  2. Badan Geologi Kementrian ESDM., 2017, Executive Summary Pemutakhiran Data dan Neraca Sumber Daya Mineral Status 2016, Jakarta.
  3. Badan Standar Nasional, 1998, Klarifikasi Sumberdaya Mineral dan Cadangan Amandemen 1, SNI-13-4726-1998.
  4. Barbosa-Filho, O., and Monhemins, A.J., 1994, Iodide-thiocyanate leaching system for gold, Hydrometallurgy ’94, Springer, Dordrecht
  5. Baghalha, M., 2012, The leaching kinetics of an oxide gold ore with iodide/iodine solutions, Hydrometallurgy, 113-114, 42-50.
  6. Data LEADS Asia News Network, Six countries produce 91 % of gold in Asia, diambil dari http://www.nationmultimedia.com/detail/aec/ 30300363, diakses pada tanggal 15 November 2018.
  7. Feceriova, J., Balaz, P., and Villachica, C. L., 2005, Thiosulfate leaching of silver, gold and bismuth from a complex sulfide concentrates, Hydrometallurgy, 77, 35-39.
  8. Feng, D., and Deventer, J.S.J.V., 2007, The role of oxygen in thiosulphate leaching of gold, Hydrometallurgy, 85, 193-202.
  9. Feng, D., and Deventer, J.S.J.V., 2011, Thiosulphate leaching of gold in the presence of orthophosphate and polyphosphate, Hydrometallurgy, 106, 38-45.
  10. Handayani, S., dan Suratman., 2017, Biooksidasi: Teknologi Alternatif Pengolahan Bijih Emas Refraktori, Bandung: Puslitbang Teknologi Mineral dan Batubara, 13(3), 197 – 211.
  11. Habashi, F., 1993, A Textbook of Hydrometallurgy, Métallurgie Extractive Quebec, Canada.
  12. Hredzák, S., Tomanec, R.A., Matik, M., Šepelák, V., and Václavíková, M., 2006, Magnetic separation and analysis of products obtained from coal-fired power plant fly ashes of Nikola Tesla B (Serbia), Journal of Mining and Metallurgy, 42A.
  13. Li, J, Safarzadeh, M.S., Moats, M.S., Miller, J.D., LeVier, K.M., Dietrich, M., and Wan, R.Y., 2012, Thiocyanate hydrometallurgy for the recovery of gold, Part II: The leaching kinetics, Hydrometallurgy, 113-114, 10-18.
  14. Marsden, J. O. and House, C., 2009, The Chemistry of Gold Extraction 2nd Ed., Society for Mining, Metallurgy and Eploration, Inc, Colorado
  15. Monhemius, J., abd Ball, S.P, 1995, Leaching of Dominican gold ores in iodide-catalysed thiocyanate solutions, Mineral Processing and Extractive Metallurgy IMM Transactions Section C, 104, C117-C124
  16. Mufakhir, F. R., Astuti, W., Prasetyo, E., Sumardi, S., Sudibyo, Handoko, A.S., Junaedi, A., Marsas, N. dan Supriyatna, Y. I., 2019, Characterization of gold ore from tanggamus mine lampung province, IOP Conference Series: Materials Science and Engineering 478, 012018.
  17. Orgul S., and Atalay, U., 2002, Reaction chemistry of gold leaching in thiourea solution for a Turkish gold ore, Hydrometallurgy, 67, 71-77.
  18. Setiawan, I., Zulkarnain, I., Indarto, S., and Sudarsono, 2005, Alterasi dan mineralisasi di sayap barat Pegunungan Bukit Barisan: Kasus daerah Kota Agung dan sekitarnya Kabupaten Tanggamus - Propinsi Lampung, Jurnal RISET Geologi dan Pertambangan, 15 (1), 13- 26.
  19. Somasundaran, P. and Wang, D., 2006, Solution Chemistry: Minerals and Reagents, Elsevier, Amsterdam.
  20. Sokic, M., Ilic, I., Zivkovic, D., and Vuckovic, N., 2008, Investigation of mechanism and kinetics of chalcopyrite concentrate oxidation process, Metalurgija, 47 (2), 109-113.
  21. Yang, X., Moats, M. S., Miller, J.D., Wang, X., Shi, X., and Xu, H., 2010, Thiourea – thiocyanate leaching system for gold, Hydrometallurgy, 106 (1-2), 58-63
  22. Yannopolous, J. C., 1991, The Extractive Metallurgy of Gold, Springer US, New York.