Advertisement

JOM

, Volume 44, Issue 1, pp 35–39 | Cite as

The flash reduction of electric arc furnace dusts

  • Li Wu
  • Nickolas J. Themelis
Zinc Recovery Research Summary

Abstract

The flash processing of electric arc furnace (EAF) dusts is a promising method for recovering zinc and producing nontoxic slags for direct disposal. In order to reduce the zinc content of the dust particles and maintain the iron content in oxide form, a certain range of temperature and oxygen potential must be provided, as dictated by thermodynamic requirements. Experiments were conducted with EAF dusts at three levels of zinc concentration in an electrically heated flash reactor. The results showed that the CO:CO2 ratio in the process gas was the most important parameter. The effects of zinc content in dust and O2 in inlet gas on zinc recovery were secondary. Toxicity leach tests showed that the resulting slag, even at low zinc recovery, can be disposed safely as landfill.

Keywords

Dust Zinc Vapor Flash Furnace Reaction Shaft Zinc Recovery 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J.J. Bosley et al., “Technoeconomic Assessment of Electric Steelmaking Through the Year 2000,” Research Project 2787-2, Final Report (Pittsburgh, PA: Center for Metal Production, 1987).Google Scholar
  2. 2.
    H. Schnitzer, “Tendencies in Electric Furnace Steel Production, Especially Considering: Scrap Preheating, Energy Recovery and Ladle Heating Furnace” (Paper presented at First MD-EAF-Conference EBT 86, September 1986).Google Scholar
  3. 3.
    D.R. MacRae, “Electric Arc Furnace Dust Disposal, Recycle and Recovery,” Research Report (Pittsburgh, PA: Center for Metals Production, 1985).Google Scholar
  4. 4.
    L.W. Lherbier, Jr., CMP Report No. 88-1 (Pittsburgh, PA: Center for Metals Production, August 1988).Google Scholar
  5. 5.
    C.C. Harris, Columbia University, “The Measurements of Density and Particle Size of EAF Dust,” private communication, 1988.Google Scholar
  6. 6.
    Lehigh University, “Characterization, Recovery and Recycling of Electric Arc Furnace Dust” (Washington, D.C.: U.S. Dept. of Commerce, February 1982).Google Scholar
  7. 7.
    J.P. Hager and J.P. Downey, Colorado School of Mines, private communication, February 1991.Google Scholar
  8. 8.
    N.D.H. Munroe, “Simulation of Flash Smelting Phenomena in a Laboratory Reactor,” D. Eng. Sc. Thesis, Columbia University, 1987.Google Scholar
  9. 9.
    Y.B. Hahn and H.Y. Sohn, “Mathematical Modeling of Sulfide Flash Smelting Process: Part I. Model Development and Verification with Laboratory and Pilot Plant Measurements for Chalcopyrite Concentrate Smelting,” Met. Trans. B, 21B (December 1990).Google Scholar
  10. 10.
    Developed by T. George, TG Chemicals, P.O. Box 1745, Pittsburgh, PA 15230.Google Scholar
  11. 11.
    J.M. Toguri, N.J. Themelis, and P. H. Jennings, Can. Met. Quart., 3 (1964), pp. 197–219.Google Scholar
  12. 12.
    Li Wu, “Rate Phenomena in Flash Processing of Electric Arc Furnace Dusts,” Ph.D Thesis, Columbia University, 1991.Google Scholar
  13. 13.
    A. Roine, “HSC-Software Ver. 4.0 for Thermodynamic Calculations” (Finland: Outokumpu Research Center).Google Scholar
  14. 14.
    Li Wu, A. Rome, and N.J. Themelis, “Energy and Material Balances Using the HSC and LOTUS Programs,” Computer Software in Chemical and Extractive Metallurgy, ed. Thompson, Ajersch, and Eriksson (Elmsford Park, NY: Pergamon Press, 1989), pp. 253–269.Google Scholar
  15. 15.
    A.M. Hagni and R.D. Hagni, University of Missouri at Rolla, private communication, March 1991.Google Scholar
  16. 16.
    T. Kimura et al., “Reaction Mechanism in a Flash Smelting Reaction Shaft,” Mathematical Modeling of Materials Processing Operations, ed. J. Szekely et al. (Warrendale, PA: TMS, 1987), pp. 403–418.Google Scholar
  17. 17.
    N.J. Themelis, L. Wu, and Q. Jiao, “Some Aspects of Mathematical Modeling of Flash Smelting Phenomena,” Flash Reaction Processes (Rolla, MO: Generic Center for Pyrometallurgy, 1988), pp. 263–287.Google Scholar
  18. 18.
    J.F. Pusateri, Horsehead Research and Development Co., private communication, 1990.Google Scholar
  19. 19.
    R. Chew, “St. Joe Flame Reactor Strategic Metal Recovery and Hazardous Waste Treatment Process” (Monaca, PA: St. Joe Technical Services, October 1987).Google Scholar
  20. 20.
    C.O. Bounds and J.F. Pusateri, “EAF Dust Processing in the Gas-Fired Flame Reactor Process,” Lead-Zinc ’90, ed. T.S. Mackey and R.D. Prengaman (Warrendale, PA: TMS, 1990), pp. 511–528.Google Scholar

Copyright information

© TMS 1992

Authors and Affiliations

  • Li Wu
    • 1
  • Nickolas J. Themelis
    • 1
  1. 1.Columbia UniversityUSA

Personalised recommendations