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Minerals & Metallurgical Processing

, Volume 35, Issue 3, pp 109–116 | Cite as

Pressure leaching of copper concentrates at Morenci, Arizona — 10 years of experience

  • C. Green
  • J. Robertson
  • J. O. MarsdenEmail author
Article
  • 3 Downloads

Abstract

In 2003, a high-temperature pressure leaching circuit to treat copper sulfide concentrates was commissioned at the copper/molybdenum operation at Bagdad, AZ. In late 2007, a medium-temperature pressure leaching circuit was commissioned at the Morenci mine in Arizona. The Morenci circuit was shut down in mid-2008, following a fire in the autoclave circuit. The onset of the global financial crisis in late 2008 resulted in significant changes to the operating profile in the Southwestern United States with respect to concentrates production, concentrates treatment, acid production and acid consumption. As a result of these changes, the Morenci concentrator was shut down, and the pressure leaching circuit remained offline. In late 2014, the increasing acid requirements in the Southwestern United States prompted a reevaluation of the Morenci concentrate leaching facilities. As a result, the pressure leaching circuit was restarted in high-temperature (200 °C) mode in May 2015 and has operated successfully for three years since recommissioning. This paper describes the current pressure leaching circuit configuration and the factors leading to the successful application of copper sulfide concentrate leaching at this location.

Keywords

Copper Pressure leaching Copper sulfide concentrates 

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References

  1. Brewer, R.E., 2004, “Copper concentrate pressure leaching — Plant scale-up from continuous lab testing,” Minerals & Metallurgical Processing, Vol. 21, No. 4, November, pp. 202–208.Google Scholar
  2. Marsden, J.O., 2007, “Technology development in the copper industry. Plenary presentation,” Proceedings of the Sixth International Copper-Cobre 2007 Conference, Vol. IV, Book 1, P.A. Riveros, D.G. Dixon, D.B. Dreisinger and M.J. Collins, eds., Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, Quebec, Canada, pp 31–77.Google Scholar
  3. Marsden, J.O., and Brewer, R.E., 2003, “Hydrometallurgical treatment of copper concentrates by Phelps Dodge at Bagdad,” Proceedings of the ALTA 2003 Copper-8 Conference, ALTA Metallurgical Services, Castlemaine, Victoria, Australia.Google Scholar
  4. Marsden, J.O., Brewer, R.E., and Hazen, N., 2003, “Copper concentrate leaching developments by Phelps Dodge Corporation,” Proceedings of Hydrometallurgy 2003 — 5th International Symposium in Honor of Prof. Ian Ritchie, C.A. Young, A. Alfantazi, C. Anderson, A. James, D. Dreisinger and B. Harris, eds., The Minerals, Metals & Materials Society Warrendale, PA, Vol. 2, pp. 1429–1446.Google Scholar
  5. Marsden, J.O., and Wilmot, J.C., 2007, “Sulfate-based flowsheet options for hydrometallurgical treatment of copper sulfide concentrates,” Proceedings of the Sixth International Copper-Cobre 2007 Conference, Vol. IV (Book 1), P.A. Riveros, D.G. Dixon, D.B. Dreisinger and M.J. Collins, Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, Quebec, Canada, pp. 77–100.Google Scholar
  6. Marsden, J.O., Wilmot, J.C., and Hazen, N., 2007a, “Medium-temperature pressure leaching of copper concentrates — Part I: Chemistry and initial process development,” Minerals & Metallurgical Processing, Vol. 24, No. 4, pp. 193–204.Google Scholar
  7. Marsden, J.O., Wilmot, J.C., and Hazen, N., 2007b, “Medium-temperature pressure leaching of copper concentrates — Part II: Development of direct electrowinning and an acid-autogenous process,” Minerals & Metallurgical Processing, Vol. 24, No. 4, pp. 205–217.Google Scholar
  8. Marsden, J.O., Wilmot, J.C., and Mathern, D.R., 2007, “Medium-temperature pressure leaching of copper concentrates — Part III: Commercial demonstration at Bagdad, Arizona,” Minerals & Metallurgical Processing, Vol. 24, No. 4, pp. 218–225.Google Scholar
  9. Marsden, J.O., Wilmot, J.C., and Smith, R.J., 2007, “Medium-temperature pressure leaching of copper concentrates — Part IV: Application at Morenci, Arizona,” Minerals & Metallurgical Processing, Vol. 24, No. 4, pp. 226–236.Google Scholar
  10. White, R.H., 1999, “Morenci: Making the most of a world class resource,” Copper Leaching, Solvent Extraction, and Electrowinning Technology, G.V. Jergensen II, ed., Society for Mining, Metallurgy & Exploration, Inc., Englewood, CO.Google Scholar
  11. Wilmot, J.C., Smith, R.J., and Brewer, R.E., 2004a, “Start-up and operation of the Phelps Dodge Concentrate Leach Facility at the Bagdad Mine in Arizona,” Hydro-Sulfides 2004 — International Colloquium on Hydrometallurgical Processing of Copper Concentrates, T. Vargas, ed., April 16–19, 2004, Universidad de Chile, Santiago, Chile.Google Scholar
  12. Wilmot, J.C., Smith, R.J., and Brewer, R.E., 2004b, “Concentrate Leach Plant Start-Up, Operation and Optimization at the Phelps Dodge Bagdad Mine in Arizona,” Pressure Hydrometallurgy 2004 — International Conference on the Use of Pressure Vessels for Metals Extraction and Recovery, M.J. Collins, and V.G. Papangelakis, eds., Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, Quebec, Canada.Google Scholar

Copyright information

© The Society for Mining, Metallurgy & Exploration 2018

Authors and Affiliations

  1. 1.Freeport-McMoRan Mining Company Technology CenterSaffordUSA
  2. 2.Freeport-McMoRan Mining Company Technology CenterTucsonUSA
  3. 3.MetallurgiumPhoenixUSA

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