Skip to main content
SpringerLink
Log in

The effect of stoichiometry on the ignition behaviour of synthetic pyrrhotites

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

A series of pyrrhotites of various stoichiometries was synthesized and characterized, and fractionated into four particle size ranges. The ignition temperatures and extent of reaction were determined by a thermogravimetric method. These measurements enabled the effect of stoichiometry and particle size on the ignition temperature and extent of oxidation to be established. The trends observed in the ignition behaviour are consistent with the concept of sulfur evolution being the key to the initiation of the ignition reaction.

Zusammenfassung

Es wurde eine Reihe Pyrrhotine unterschiedlicher Zusammensetzung hergestellt, beschrieben und nach Partikelgröße in vier Fraktionen zerlegt. Zündungstemperatur und Reaktionsausmaß wurden thermogravimetrisch bestimmt. Durch diese Messungen wurde es ermöglicht, den Einfluß von Stöchiometrie und Partikelgröße auf Zündungstemperatur und Oxidationsausmaß zu schätzen. Die beim Zündungsverhalten beobachteten Tendenzen stimmen mit dem Konzept überein, wonach die Freisetzung von Schwefel zum Einsetzen der Zündungsreaktion führt.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. J. G. Dunn, A. Jayaweera and S. G. Davies, Proc. Australas. Inst. Min. Metall., 290 (1985) 75.

    Google Scholar 

  2. F. R. A. Jorgenson, Proc. Australas. Inst. Min. Metall., 268 (1978) 47.

    Google Scholar 

  3. T. N. Smith, J. G. Dunn, L. C. Mackey and I. R. Stevenson, Report No. 39, (1988), Minerals and Energy Research Institute of Western Australia.

  4. J. G. Dunn, S. G. Davies and L. C. Mackey, Proc. Australas. Inst. Min. Metall., 294 (1989) 57.

    Google Scholar 

  5. I. Barin, M. Modigell and F. Sauert, Thermodynamics and kinetics of cyclone smelting, in H. Y. Sohn, D. B. George and A. D. Zunkel (eds), Advances in Sulphide Smelting, Proc. International Sulphide Smelting Symposium, Metall. Soc. AIME, Vol 1, 1983 p. 257.

  6. H. Juntgen, EPE, Rev. Energ. Primaire, 12 (1976) 11.

    Google Scholar 

  7. M. A. Nettleton and R. Stirling, Proc. Roy. Soc. Ser. A, 300 (1967) 62.

    Google Scholar 

  8. S. Yuasa and T. Takeno, Nineteenth Symposium (International) on Combustion, The Combustion Institute, (1982) 741.

  9. L. S. Merril, Fuel, 52 (1973) 61.

    Article  Google Scholar 

  10. N. J. Themelis and H. H. Kellogg, Principles of Sulphide Smelting, in H. Y. Sohn, D. B. George and A. D. Zunkel (eds), Advances in Sulfide Smelting, Proc. International Sulfide Smelting Symposium, Metall. Soc. AIME, Vol. 1, 1983 p. 1.

  11. Y. H. Kim, Studies of the rate phenomena in partculate flash reaction systems: Oxidation of metal Sulfides, PhD thesis, (1987) Columbia University.

  12. F. R. A. Jorgenson, Australian Japan Extractive Metallurgy Symposium, Australas. Inst. Min. Metall., (1980) 41.

  13. R. G. Arnold, Economic Geology, 57 (1962) 72.

    Google Scholar 

  14. P. Toulmin and P. B. Barton, Geochim. Cosmochim. Acta, 28 (1964) 641.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. School of Applied Chemistry Curtin University of Technology Perth, Western Australia

    J. G. Dunn & A. C. Chamberlain

Authors
  1. J. G. Dunn
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. C. Chamberlain
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Dedicated to Professor Dr. H. J. Seifert on the occasion of his 60th birthday

We are grateful to Dr. B. Robinson of the CSIRO Division of Mineral Products, Perth, for making available the microprobe equipment and assisting in the collection of data.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Dunn, J.G., Chamberlain, A.C. The effect of stoichiometry on the ignition behaviour of synthetic pyrrhotites. Journal of Thermal Analysis 37, 1329–1346 (1991). https://doi.org/10.1007/BF01913865

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01913865

Keywords

Search

Navigation