Abstract
Generally in the sulphate system, oxidative leaching of metal sulphides is not conducive to selectivity, due to the unselective oxidation of sulphide to elemental sulphur or to sulphate. However, in the chloride system, the ability to control the redox potential at a lower level on account of the stability of the cupric / cuprous ion species, permits the selective dissolution with respect to copper, of metals such as Pb, Ni, Zn, Fe by means of cupric chloride, according to the metathesis reaction, provided that the sulphide mineral is thermodynamically unstable under the conditions of leaching.
In the case of easily oxidisable sulphides, such as the components of copper matte or leadsulphide, under the oxidation potential conditions, at which cuprous sulphide is converted to cupric sulphide, according to the reaction:CUS + CuCl2 → CuS + 2 CuCl, selectivity of leaching of metals (Me) in respect to copper can be achieved, according to the simplified metathesis reaction MeS + CuCl2 → MeCl2 + CuS
Thereby, the cupric/cuprous chloride leach solution can be regenerated from the covellite formed by oxidation with CI2 or HC1 and O2.
In the case of a matte, the selective leaching and regeneration occur simultaneously, according to the overall reaction: Cu2S.MeS + Cl2 → 2CuS + MeCl2
In the case of less easily oxidisable sulphide minerals, selectivity of leaching of metals with regard to copper can still be achieved by the metathesis reaction at elevated temperature. The oxidation of sulphide to sulphate is prevented by maintaining a high cuprous to cupric ratio in the chloride solution. An industrial application is the Falconbridge chlorine leach process for copper-nickel matte. Based on investigations, potential applications were identified in the field of complex or bulk metal sulphide concentrate treatment, copper-lead matte processing and also chemical converting.
The application of selectivitiy principle in sulphide leaching provides environmental benefits, since the sulphide itself is used for separation and the sulphur is brought in an environmental compatible form.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Leroy J. L., Lenoir P. J. and Escoyez L. E., Lead Smelter Operation at N. V. Metallurgie Hoboken SA., in: Extractive Metallurgy of Lead and Zinc, Cotterill C. H. and Cigan J. M., TMS-AIME, (1970), chap. 28, pp. 824–852
Franckaerts A., Optimisation of the Lead-Sinter Plant and Blast-Furnace Operations at Metallurgie Hoboken-Overpelt, TMS-AIME Paper No. A86-53, (1986)
Thornhill P. G., Wigstöl E. and Van Weert G., J.O.M., 23, (July, 1971), pp. 13–18
Stensholt E. O., Zachariasen H. and Lund J. H., Falconbridge Chlorine Leach Process, in: Extraction Metallurgy′85, IMM, London, (Sept. 1985), Trans. IMM, C, V5, (1986), pp. 10–16
Lai R. and Nicol J. H., The BHAS Copper Leach Plant, TMS-AIME Paper No. A87-1, (1987)
Meadows N. E. and Valenti M., The BHAS Copper-Lead Matte Treatment Plant, Proc. of Non-ferrous Smelting Symposium, Port Pirie, S A., (Sept. 1989), pp. 155–157
Au-Yeung S. C. F. and Bolton G. L., Iron Control in Processes developed at Sherritt Gordon Mines, Proc. 16th Annual Hydrometallurgical Meeting of CIM, in: Iron Control in Hydrometallurgy, 19, (1986), chap. 6, pp. 131–151
Berezowsky R. M. G. S., Collins M. J., Kerfoot D. G. E. and Torres N., The Commercial Status of Pressure Leaching Technology, J.O.M., (February, 1991), pp. 9–15
Dutrizac J. E., The Leaching of Sulphide Minerals in Chloride Media, Hydrometallurgy, 29, (1992), pp. 1–45
Zunkel A. D., Cuprex Metal Extraction Process (CMEP) Ready for Commercial Application, Engineering and Mining Journal, (December 1993), pp. 32-ff.
Hoffmann J. E., Winning Copper via Chloride Chemistry — An Elusive Technology, J.O.M., (August, 1991), pp. 48–49
Collins D. N., et al., Role of Chloride Hydrometallurgy in Processing of Complex (Massive) Sulphide Ores, in: P. M. J. Gray, et al. (Editors), Sulphide Deposits — Their Origin and Processing, IMM, London, (1990), pp. 233–254
Craigen W. J. S., et al., Evaluation of the CANMET Ferric Chloride Leach Process (FCL) for the Treatment of Complex Base-Metal Ores, in: P. M. J. Gray, et al. (Editors), Sulphide Deposits — Their Origin and Processing, IMM, London, (1990), pp. 255–269
Peters E., Direct Leaching of Sulfides, Chemistry and Applications, Metallurgical Trans. B, Vol 7B, (Dec. 1976), pp. 505–517
Ferreira R. C. H., High Temperature E-pH Diagrams for the System S-H2O, CU-S-H2O and Fe-S-H2O, in: Leaching and Reduction in Hydrometallurgy, Ed. Burkin A. R., IMM, (1975), pp. 67–83
Enadimsa — Técnicas Reunidas S.A., Estudio Económico de un nuevo Procedimiento Industrial de Beneficio de Minerales Piríticos Complejos, Informe no. ITR/JM-4515/021/1978, Madrid, (Dec. 1978)
Druckard W. J., Canterford J. H., Dyson N. F., et al., Oxygen Pressure Leaching of a Bulk Flotation Concentrate from a Complex Cu-Pb-Zn Sulphide Ore, Non-ferrous Smelting Symposium, Port Pirie, S A., (September 1989), pp. 111–117
Dawson P., Acid Pressure Oxidation of Sulfide Flotation Concentrates, TMS-AIME Paper No A86-8,(1986)
Kuhn M. C, Arbiter N., Kling H., Anaconda’s Arbiter Process for Copper, C.I.M. Bulletin, 67, (Febr. 1974), pp. 62–73
Peters E., The Physical Chemistry of Hydrometallurgy, in: International Symposium on Hydrometallurgy, TMS-AIME, Chicago, (1973), chap. 10, pp. 205–228
Gerlach J., Pawlek F., Rödel R. et al, Der Einfluß des Gitteraufbaus von Metallverbindungen auf ihre Laugbarkeit, Erzmetall, Bd. 25, (1972), H. 9, pp. 448–453
Daiger K., Gerlach J., Zur Kinetik der direkten Laugung Sulfidischer Erze, Erzmetall, Bd. 35, (1982), H.12, pp. 609–611
Holdich R. G., Broadbent C. P., Investigation of the Dissolution of Pyrite in Copper (II) Chloride Solutions, in: Extraction Metallurgy ′85, IMM, London, (1985), pp. 645–658
Mukherjee T. K., Hubli R. C, Gupta C. K., A Cupric Chloride-Oxygen Leach Process for a Nickel-Copper Sulphide Concentrate, Hydrometallurgy 15, (1985), pp. 25–32
Guy S., Broadbent C. P., Laugung eines komplexen Cu/Zn/Pb-Erzes mit Kupfer(II)-Chlorid, Aufbereitungstechnik, Nr. 9, (1983), pp. 539–547
Guy S., Broadbent C. P., Lawson G. S., et al., Cupric Chloride Leaching of a Complex Copper/Zinc/Lead Ore, Hydrometallurgy, 10, (1983), pp. 243–255
Greig J. A., Oxidative Chloride Leaching of Sulphide Concentrates, in: Separation Processes in Hydrometallurgy, Ed. Davis G. A., (1987), pp. 35–48
Everett P. K., The Dextec Lead Process, in: Hydrometallurgy — Research, Development and Plant Practice, Ed. Osseo-Asure K., Miller J. D., TMS-AIME, New York, (1982), pp. 165–176
Filmer A. O., Briggs G. G., Recovery of Lead from Mixed Sulphide Concentrates, MINTEK 50 Symposium, Johannesburg, (1984)
Bonan M., Demarthe J. M., Renon H., et al, Chalcopyrite Leaching by CuC12 in Strong NaCl Solutions, Metallurgical Transactions B, Vol 12 B, (June 1981), pp. 269–274
Muir D. M., Senanayaki G., Principles and Applications of Strong Salt Solutions to Mineral Chemistry, in: Extraction Metallurgy ′85, IMM, (1985)
Muir D. M., Ritcey G. M., Canterford J. H., Recent Developments in Chloride Hydrometallurgy, in: Symposium on Extractive Metallurgy, Aus. IMM, (Nov. 1984), pp. 153–161
Peters E., Applications of Chloride Hydrometallurgy to Treatment of Sulphide Minerals, in: Proc. on Chloride Hydrometallurgy, Benelux Metallurgie, Brussels (Sept. 1977), pp. 1–36
Canterford J. H., Chloride Hydrometallurgy — Its Future Potential, Chemeca ′83, The Eleventh Australian Conference on Chemical Engineering, Paper 2C, Brisbane, (Sept. 1983), pp. 73–82
Edmiston K.J., An Update on Chloride Hydrometallurgical Processes for Sulphide Concentrates, SME-AIME, Paper No 84–114, (1984)
Stensholt E. O., Zachariasen H., Lund J. H. and Thornhill P. G., Recent Improvements in the Falconbridge Nickel Refinery, in: Proceedings of Symposium on Extractive Metallurgy of Nickel, Cobalt, TMS-AIME, Phoenix, Az, (Jan. 1988), pp. 403–412
Dutrizac J. E., Chen T. T., The Effect of Elemental Sulphur Reaction Product on the Leaching of Galena in Ferric Chloride Media, Metallurgical Transactions B, Vol 21 B, (Dec 1990), pp. 935–943
Dahms J., Gerlach J., Pawlek F., Beitrag zur Drucklaugung von Kupfersulfiden, Erzmetall, Bd. 20, (1967), H. 5, pp. 203–208
Kametani H., Aoki A., Potential-pH-Diagramme für das Spurstein / Digenit / Covellit-SO4-H2O Suspensionssystem bei 90°C, Erzmetall, Bd 29, (1976), H. 9, pp. 394–402
Johnson R. D., Miller I. B., Meadows N. E., Ricketts N. J., Oxygen Treatment of Sulphidic Materials at Atmospheric Pressure in an Acid Chloride-Sulphate Lixiviant, Proc. of Non-Ferrous Smelting Symposium, Port Pirie, S.A., (Sept. 1989), pp. 163–166
Cheng C. Y., Lawson F., The Leaching of Synthetic Chalcocite and Covellite in Oxygenated Acidic Sulphate-Chloride Solutions, Proc. of Non-Ferrous Smelting Symposium, Port Pirie, S.A., (Sept. 1989), pp. 167–174
Clevenger G. W., Pepple G. W., US Pat. 4, 384, 890, (May 24, 1983), Cupric Chloride Leaching of Copper Sulphides
Duyvesteyn W. C, et al., The Escondida Process for Copper Concentrates, in: Proc. of the Paul E. Queneau International Symposium, Extractive Metallurgy of Copper, Nickel and Cobalt, Denver, Co, 1993
Unpublished results of investigations by the author.
McGauley P. J., Roberts E. S., US Pat. 2, 568, 963, (Sept. 25,1951)
Yamada M., (Dowa Mining), Jap. Pat. 49-123926, (Nov. 27, 1974), Process for the Recovery of Copper
O’Neill C. E., Illis A., Huggins D. A., US Pat. 3, 616, 331, (Oct. 26, 1971), Recovery of Nickel and Copper from Sulfides
Johnson R. K., Coltrinari E. L., US Pat. 3, 957, 602, (May 18,1976), Recovery of Copper from Chalcopyrite Utilizing Copper Sulfate Leach
McKay D. R., Parker E. G., US Pat. 4, 024, 218, (May 17, 1977), Process for Hydrometallurgical Upgrading
Swinkels G. M., et al., The Sherritt Gordon — Cominco Copper Process — Part I: The Process, CIM Bulletin, (February 1978), pp. 105–121
Renken H. C, Zegers T. W., US Pat. 3, 655, 538, (Apr. 11,1972), Process for Electrowinning Zinc from Sulfide Concentrates
Collier D., et al, Comparative Economics of Sulphate-Based Hydrometallurgical Processes for the Treatment of Complex Sulphide Ores, Extraction Metallurgy ′85, IMM, London, Sept. 1985, pp. 997–1014
Bartlett R. W., et al, A Process for Enriching Chalcopyrite Concentrates, in: Metallurgical Reactor Design and Kinetics, Ed. Bautista, et al, TMS-AIME, 1986, pp. 227–246
Bartlett R. W., Copper Super-Concentrates-Processing, Economics, and Smelting, EDP-Proceed-ings ′92, TMS-Annual Meeting, San Diego, Ca., March 1992
Goens D. N., Can. Pat. 1, 065, 615, (Jun. 11, 1979), Hydrometallurgical Purification Process
Piret N. L., Höpper M., Kudelka H., US Pat. 4, 260, 588, (Apr. 7, 1981), Production of Sulphidic Copper Concentrates
Shirts M. B., et al., Aqueous Reduction of Chalcopyrite Concentrate with Metals, US Bureau of Mines RI-7953,1974
Hackl R., et al., Reverse Leaching of Chalcopyrite, in: Proceedings of International Conference Copper ′87, Viña del Mar, Chile, (1987), pp. 181–200
Sohn H.-J., et al., Reduction of Chalcopyrite with SO2 in the Presence of Cupric Ions, J.O.M., (Nov. 1980), pp. 18–22
Sequeira C. A. C, Electrochemical Reductive Conversion of Chalcopyrite with SO2, in: EMC ′91: Non-Ferrous Metallurgy — Present and Future, Elsevier, 1991, pp. 219–228
Hougen L. R., US Pat. 3, 880, 653 (Apr. 29, 1975), Chlorine Leach Process
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Piret, N.L., Castle, J.F. (1994). Scope and limitations for application of selectivity in oxidation potential-controlled leaching of metal sulphides. In: Hydrometallurgy ’94. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1214-7_14
Download citation
DOI: https://doi.org/10.1007/978-94-011-1214-7_14
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4532-2
Online ISBN: 978-94-011-1214-7
eBook Packages: Springer Book Archive