Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30464
Leaching of Flotation Concentrate of Oxide Copper Ore from Sepon Mine, Lao PDR

Authors: S. Vasailor, C. Rattanakawin

Abstract:

Acid leaching of flotation concentrate of oxide copper ore containing mainly of malachite was performed in a standard agitation tank with various parameters. The effects of solid to liquid ratio, sulfuric acid concentration, agitation speed, leaching temperature and time were examined to get proper conditions. The best conditions are 1:8 solid to liquid ratio, 10% concentration by weight, 250 rev/min, 30 oC and 5-min leaching time in respect. About 20% Cu grade assayed by atomic absorption technique with 98% copper recovery was obtained from these combined optimum conditions. Dissolution kinetics of the concentrate was approximated as a logarithmic function. As a result, the first-order reaction rate is suggested from this leaching study.

Keywords: sulfuric acid, dissolution kinetics, agitation leaching, flotation concentrate, oxide copper ore

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 70

References:


[1] H. R. Watling. “The bioleaching of sulphide minerals with emphasis on copper sulphides—a review.” Hydrometallurgy, 84(1-2) (2006), pp. 81-108.
[2] G. W. Seward. “Leaching, SX-EW Production of Copper–A Global View.” In Zeneca-China-Symposium, Acorga Ltd. Technical Library (www. acorga. com), 1997, (p. 10).
[3] T. Radu, D. Diamond., Comparison of soil pollution concentrations determined using AAS and portable XRF techniques. Journal of Hazardous Materials, 171(1-3) (2009), pp. 1168-1171.
[4] S. Song, F. Rao, X. Zhang., Effect of morphology on sulphuric acid leaching of malachite ores. Mineral Processing and Extractive Metallurgy, 120(2) (2011), pp. 85-89.
[5] M. A. Shabani, M. Irannajad, A. R. Azadmehr., Investigation on leaching of malachite by citric acid. International Journal of Minerals, Metallurgy, and Materials, 19(9) (2012), pp. 782-786.
[6] D. Bingöl, M. Canbazoğlu., Dissolution kinetics of malachite in sulphuric acid. Hydrometallurgy, 72 (2004), pp. 159-165.
[7] O. N. Ata, S. Çolak, Z. Ekinci, M. Çopur., Determination of the optimum conditions for leaching of malachite ore in H2SO4 solutions. Chemical Engineering & Technology: Industrial Chemistry‐Plant Equipment‐Process Engineering‐Biotechnology, 24(4) (2001), pp. 409-413.
[8] R. W. Barlett. Solution mining, leaching and fluid recovery of materials vol. 5. Gordon & Breach, Philadelphia, 1992, pp. 76– 107.
[9] P. Blazy. “La valorisation des minerais: manuel de minéralurgie (Vol. 2). Presses universitaires de France. Paris, 1970, pp. 108.
[10] F.W. Ntengwe. The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions. Open Mineral Processing Journal, 3 (2010), pp. 60-67.
[11] C. Rattanakawin, S. Varsailor. “Flotation of oxide copper ore from Sepon mine, Lao PDR with sodium oleate”. Songklanakarin Journal of Science and Technology, to be published.
[12] K. N. Han. “Fundamentals of aqueous metallurgy”. SME, Colorado, 2002, pp. 107-164.