Cobalt and Copper Recovery from the Ancient Flotation Tailings using Selective Sulfation Roast - Leaching Process
Abstract
The ancient flotation tailings from Lefke, Cyprus, have a potential for non-ferrous metals such as cobalt and copper from more than 9.5 million tons of reserves containing 0.38% Cu, 0.032% Co, and 22.6% Fe. Recovery of cobalt and copper from these tailings would provide great benefits from economic and environmental perspectives. Therefore, in this study, following determination of the mineralogy and chemical composition of the tailings, certain processes such as direct leaching and sulfation roasting with/without additives before leaching were applied. Since low metal extractions were obtained from direct leaching, a selective sulfation process was applied on the tailings before leaching in order to produce a pregnant solution containing higher amounts of Co and Cu metals by reducing the iron concentration. When sulfation roasting was performed without any additive, the desired selectivity could not be provided, since the sample was considerably oxidized under atmospheric conditions in the past. Therefore, the usage of Na2SO4 as an additive with the amount of 25% at a roasting temperature of 700ºC was tested. Consequently, the Na2SO4 improved the sulfation and resulted in higher cobalt (90.1%) and copper (71.2%) recovery in leaching. Beside this, an improvement with a selective sulfation was obtained by the promoting effect of Na2SO4 and the iron extraction decreased from 26.1% to 3.9%.
References
Dimitrijevic, D.M.D, Urosevic, D.M., Jankovic, Z.D., and Milic, S.M., “Recovery of copper from smelting slag by sulphation roasting and water leaching” Physicochemical Problems of Mineral Processing, 2016, vol. 52, no. 1, pp. 409−421.
Boyrazlı, M., Altundogan, H.S., and Tumen, F., “Recovery of metals from copper converter slag by leaching with K2Cr2O7-H2SO4” Canadian Metallurgical Quarterly, 2006, vol. 45, no. 2, pp. 145-152.
Tumen, F. and Bailey, N.T., “Recovery of metals from copper smelter slags by roasting with pyrite”. Hydrometallurgy, 1990, vol. 25, pp. 317-328.
Guntner, J. and Hammerschmidt, J., “Sulphating roasting of copper-cobalt concentrate” The Journal of the Southern African Institute of Mining and Metallurgy, 2012, vol. 112, no. 6, pp. 455-460.
Akcil, A. and Ciftci, H., “Metals recovery from multimetal sulphide concentrates (CuFeS2–PbS–ZnS): combination of thermal process and pressure leaching” International Journal of Mineral Processing, 2003, vol. 71, pp. 233–246.
Prasad, S. and Pandey, B.D., “Alternative processes for treatment of chalcopyrite - a review” Minerals Engineering, 1998, vol. 11, no. 8, pp. 763-781.
Harris, G.B., White, C.W., and Liu, Z., “Recovery of copper from oxide waste by leaching, ion exchange and electrowinning” Sixth International Copper-Cobre Conference Toronto, 2007, pp. 25–30.
Baba, A.A., Ayinla, K.I., Adekola, F.A., Ghosh, M.K., Ayanda, O.S., Bale, R.B., Sheik, A.R., and Pradhan, S.R., “A review on novel techniques for chalcopyrite ore processing” International Journal of Mining Engineering and Mineral Processing, 2012, vol. 1, no. 1, pp. 1-16.
Sarveswara R.K. and Ray, H. S., “Use of Thermal Analysis for Study of Characterisation of Multimetal Sulphides and Their Oxidation Behaviour”. Mineral Processing and Extractive Metullargy Review, 1997, 16:4, 261-278, DOI: 10.1080/08827509708914138.
Prasad, S. and Pandey, B.D., “Thermoanalytical studies on copper-iron sulphides” Journal of Thermal Analysis and Calorimetry, 1999, vol. 58, no. 3, pp. 625-637.
Sokic, M., Ilic, D., Zivkovic, D., and Vuckovic, N., “Investigation of mechanism and kinetics of chalcopyrite concentrate oxidation process” METABK, 2008, vol. 47, no. 2, pp. 109-113.
Kim, B.S., Kim, E.Y., Kim, C.K., Lee, H.I., and Sohn, J.S., “Kinetics of oxidative roasting of complex copper concentrate” Materials Transactions, 2008, vol. 49, no. 5, pp. 1192-1198.
Sargsyan, L.Y. and Hovannisyan, A.M., “Investigation of chalcopyrite cuprum concentrate roasting by thermogravimetric and differential-thermal analysis” Metallurgical and Mining Industry, 2010, vol. 2, no. 3, pp. 225-229.
Yu, D., Utigard, T.A., “TG/DTA study on the oxidation of nickel concentrate” Thermochimica Acta, 2012, vol. 533, pp. 56-65.
Kellogg, H.H., “A critical review of sulphation equilibria” Transactions of Metallurgical Society of the AIME, 1964, vol. 230, pp. 1622-1634.
Rambiyana, R.I., Den Hoed, P., and Garbers-Craig, A.M., “Fire and brimstone: The roasting of a PGM concentrate” The 6th International Platinum Conference, “Platinum–Metal for the Future”, The Southern African Institute of Mining and Metallurgy, 2014.
Yu, D., “Fluidized bed selective oxidation and sulfation roasting of nickel sulfide concentrate” PhD thesis, Department of Materials Science and Engineering, 2014, University of Toronto.
Chaubal, P.C. and Sohn, H.Y., “Kinetics and thermodynamics of chalcopyrite oxidation” Proceedings Physical Chemistry of Extractive Metallurgy, ed. Kudryk, V.R. & Rao, Y.K. The Metallurgical Society of AIME. 1984, New York, pp. 63-78.
Prasad, S., Pandey, B.D., and Palit, S.K., “Sulphation of chalcopyrite with steam and oxygen in the presence of some additives” Materials Transactions Japan Institute of Metals (JIM), 1996, vol. 37, no. 6, pp. 1304-1310.
Ozer, M., Acma, M.E., and Atesok, M.G., “Sulfation roasting characteristics of copper-bearing materials” Asia Pacific Journal of Chemical Engineering, 2017, vol. 12, no. 3, pp. 365-373.
Ghosh, S., Ambade, B., Prasad, S.K., and Choudhary, A.K., “Simultaneous extraction of copper and iron from chalcopyrite concentrates in hydrochloric acid media: Effect of additives and temperature” International Journal of Engineering and Science, 2012, ISSN: 2278-4721, vol. 1, no. 9, pp. 8-13.
Zhao, Y.M., Hou, Y.N., Cui, Y.G., Liang, H.W., and Li, L.N., “Recovery of copper from copper sulfide concentrate by sulfation roasting” International Journal of Nonferrous Metallurgy, 2015, vol. 4, pp. 9-13.
Basturkcu, H. and Acarkan, N., “Separation of nickel and iron from lateritic ore using a digestion–roasting–leaching–precipitation process” Physicochemical Problems of Mineral Processing, 2016, vol. 52, no. 2, pp. 564−574.
Mpinga, C.N., Eksteen, J., Aldrich, C., and Dyer, L., “Identification of the significant factors determining extractability of Ni and Cu after sulfation roasting of a PGM-bearing chromitite ore” Minerals Engineering, 2017, vol. 110, pp. 153–165.
Vieceli, N., Nogueira C. A., Pereira M. F. C., Durão F. O., Guimarães C. and Margarido F., , “Optimization of Lithium Extraction from Lepidolite by Roasting Using Sodium and Calcium Sulfates” Mineral Processing and Extractive Metallurgy Review, 2017, 38:1, 62-72.
Kar, B.B. and Swamy, Y.V., “Some aspects of nickel extraction from chromitiferous overburden by sulphatization roasting” Minerals Engineering, 2000, vol. 13, pp. 1635-1640.
Guo, X., Li, D., Park, K.H., Tian, Q., and Wu, Z., “Leaching behavior of metals from a limonitic nickel laterite using a sulfation–roasting–leaching process” Hydrometallurgy, 2009, vol. 99, issues 3–4, pp. 144-150.
Lu, J., Liu, S., Shangguan, J., Du, W., Pan, F., and Yang, S., “The effect of sodium sulfate on the hydrogen reduction process of nickel laterite” Minerals Engineering, 2013, vol. 49, pp. 154-164.
Outotec., “Project Report” Outotec Research Oy / Jussi Liipo, 2009, 08100-ORC-M.
Olubambi, P.A., Borode, J.O., Ndlovu, S., , “Sulphuric acid leaching of zinc and copper from Nigerian complex sulphide ore in the presence of hydrogen peroxide” The Journal of The Southern African Institute of Mining and Metallurgy, 2006, vol.106, pp.765-770.
Guntner, J. and Hammerschmidt, J., “Sulphating roasting of copper-cobalt concentrates” IFSA 2011, Industrial Fluidization South Africa, 2011, ed. A. Luckos & P. den Hoed, pp. 125–134.
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