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Metallurgical Transactions B

, Volume 12, Issue 2, pp 341–352 | Cite as

Extraction of vanadium from athabasca tar sands fly ash

  • C. O. Gomez-Bueno
  • D. R. Spink
  • G. L. Rempel
Hydrometallurgy

Abstract

The production of refinery grade oil from the Alberta tar sands deposits as currently practiced by Suncor (formally Great Canadian Oil Sands Ltd.—GCOS) generates a substantial amount of petroleum coke fly ash which contains appreciable amounts of valuable metals such as vanadium, nickel and titanium. Although the recovery of vanadium from petroleum ash is a well established commercial practice, it is shown in the present work that such processes are not suitable for recovery of vanadium from the GCOS fly ash. The fact that the GCOS fly ash behaves so differently when compared to other petroleum fly ash is attributed to its high silicon and aluminum contents which tie up the metal values in a silica-alumina matrix. Results of experiments carried out in this investigation indicate that such matrices can be broken down by application of a sodium chloride/water roast of the carbon-free fly ash. Based on results from a series of preliminary studies, a detailed investigation was undertaken in order to define optimum conditions for a vanadium extraction process. The process developed involves a high temperature (875 to 950 °C) roasting of the fly ash in the presence of sodium chloride and water vapor carried out in a rotary screw kiln, followed by dilute sodium hydroxide atmosphereic leaching (98 °C) to solublize about 85 pet of the vanadium originally present in the fly ash. It was found that the salt roasting operation, besides enhancing vanadium recovery, also inhibits silicon dissolution during the subsequent leaching step. The salt roasting treatment is found to improve vanadium recovery significantly when the fly ash is fully oxidized. This is easily achieved by burning off the carbon present in the “as received” fly ash under excess air. The basic leaching used in the new process selectively dissolves vanadium from the roasted ash, leaving nickel and titanium untouched.

Keywords

Vanadium Metallurgical Transaction Petroleum Coke Rotary Screw Sodium Aluminum Silicate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. E. Gonzalez and E. Martinez:Determination de Elementes Metalicos en Petroleos Venezolanos y Preparacion de Pentoxidode Vanadio a partir De Cenizas de Crudos Redisuales, Min. Minase Hidrocarburos, Centro de Evaluacion, Carcaras, Venezuela, 1969.Google Scholar
  2. 2.
    J. A. Vezina and W. A. Gow: Technical Bulletin TB 63, Department of Energy, Mines and Resources, Ottawa, Canada, 1965.Google Scholar
  3. 3.
    A. J. O’Neal, Jr.:Combustion, 1974, vol. 46, no. 5, pp. 18–21.Google Scholar
  4. 4.
    A. Stemerowicz, R. W. Bruce, G. V. Sirianni and G. E. Viens:CIM Bulletin, 1976, vol. 69, no. 768, pp. 102–8.Google Scholar
  5. 5.
    L. A. Walker: Great Canadian Oil Sands, Edmonton, Alberta, private communication, July 1976.Google Scholar
  6. 6.
    L. A. Walker, R. W. Luhning and K. Rashid:Potential for Recovering Vanadium from Athabasca Tar Sands, Symposium on Tar Sands, 26th Canadian Chemical Engineering Conference, Toronto, 1976. Preprint volume of papers presented Canadian Society for Chemical Engineering, Ottawa, Canada.Google Scholar
  7. 7.
    P. M. Busch: Report IC 8060, U.S. Bureau of Mines, Washington, D.C., 1961.Google Scholar
  8. 8.
    H. Ottertun and S. Strandell:Solvent Extraction of Vanadium (IV) with D2EHPA and TBP, International Solvent Extraction Conference, Toronto, 1977. Proceedings, ISEC 77, vol. 2, pp. 501-16, CIM Special Volume 21, 1979, The Canadian Institute of Mining and Metallurgy, Montreal, Canada.Google Scholar
  9. 9.
    W. Whigham:Chem. Eng., 1965, vol. 72, no. 5, pp. 64–66.Google Scholar
  10. 10.
    C. O. Gomez-Bueno, G. L. Rempel, and D. R. Spink:CIM Bulletin, 1980, vol. 73, no. 820, pp. 147–51.Google Scholar
  11. 11.
    H.H. Reinhardt:Waste Treatment and Utilization—Theory and Practice of Waste Management, pp. 83–93, M. Moo-Young and G. J. Farquhar, eds., Pergamon Press, New York, 1979.Google Scholar
  12. 12.
    W. W. Hanf and M. J. Sole:Trans. Faraday Soc, 1970, vol. 66, pp. 3065–74.CrossRefGoogle Scholar
  13. 13.
    C. O. Gomez-Bueno, G. L. Rempel, and D. R. Spink: Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada, unpublished research, 1980.Google Scholar
  14. 14.
    J. R. Boldt, Jr., and P. Quenau:The Winning of Nickel, Section 4, Longmans Canada Ltd., Toronto, 1967.Google Scholar
  15. 15.
    M. H. Caron:Trans. AIME, 1950, vol. 188, pp. 67–90.Google Scholar
  16. 16.
    F. Habashi:Principles of Extractive Metallurgy, vol. 2, pp. 57–96, Gordon and Breach, New York, 1970.Google Scholar
  17. 17.
    S. Seimiya: inExtractive Metallurgy of Aluminum, vol. 1, p. 115, G. Gerard and P. T. Stroup, eds., Interscience Publishers, New York, 1963.Google Scholar
  18. 18.
    W. G. Cochran and G. M. Cox:Experimental Design, 2nd ed., Chapter 5, John Wiley & Sons, New York, 1957. 353Google Scholar

Copyright information

© American Society for Metals and the Metallurgical Society of AIME 1981

Authors and Affiliations

  • C. O. Gomez-Bueno
    • 1
  • D. R. Spink
    • 1
  • G. L. Rempel
    • 1
  1. 1.Department of Chemical EngineeringUniversity of WaterlooWaterlooCanada

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