Skip to main content
Erschienen in: Metallurgical and Materials Transactions B 2/2010

01.04.2010

Reduction of Iron Oxide Fines to Wustite with CO/CO2 Gas of Low Reducing Potential

verfasst von: R. Corbari, R.J. Fruehan

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 2/2010

Einloggen

Aktivieren Sie unsere intelligente Suche um passende Fachinhalte oder Patente zu finden.

search-config
loading …

Abstract

The reduction of iron oxide fines to wustite between 590 °C and 1000 °C with a CO–CO2 gas mixture of low reducing potential was studied. The reduction kinetics and the dominating reaction mechanism varied with the temperature, extent of reduction, and type of iron oxide. Reduction from hematite to wustite proceeded in two consecutive reaction steps with magnetite as an intermediate oxide. The first reduction step (hematite to magnetite) was fast and controlled by external gas mass transfer independently of the oxide type and the temperature employed. The second reduction step (magnetite to wustite) was the overall reaction-controlling step, and the reduction mechanism varied with the temperature and the oxide type. Moderately porous oxide fines followed the uniform internal reaction for the temperature range studied. For highly porous oxides, the second reduction step was controlled by external gas mass transfer above 700 °C. Below that temperature, a mixed regime that involves external gas mass transfer and limited mixed control, which comprises pore diffusion and chemical reaction, takes place. The rate equations for this mixed control reaction mechanism were developed, and the limited mixed control rate constant (klm) was computed. For denser oxides under uniform internal reaction, the product of the rate constant and pore surface area (k·S) was calculated.

Sie haben noch keine Lizenz? Dann Informieren Sie sich jetzt über unsere Produkte:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 390 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Maschinenbau + Werkstoffe




 

Jetzt Wissensvorsprung sichern!

Anhänge
Nur mit Berechtigung zugänglich
Literatur
1.
Zurück zum Zitat E.T. Turkdogan and J.V. Vinters: Metall. Trans., 1971 vol. 2, pp. 3175-88. E.T. Turkdogan and J.V. Vinters: Metall. Trans., 1971 vol. 2, pp. 3175-88.
2.
3.
Zurück zum Zitat R. Corbari and R.J. Fruehan: Carnegie Mellon University, unpublished research, 2004. R. Corbari and R.J. Fruehan: Carnegie Mellon University, unpublished research, 2004.
4.
Zurück zum Zitat R.J. Fruehan, K. Ito, and B. Ozturk: Trans. ISS: 1988, pp. 83–91. R.J. Fruehan, K. Ito, and B. Ozturk: Trans. ISS: 1988, pp. 83–91.
5.
Zurück zum Zitat R.J. Fruehan: Trans. ISS, 2003, vol. 30 no. 2, pp. 48-60. R.J. Fruehan: Trans. ISS, 2003, vol. 30 no. 2, pp. 48-60.
6.
Zurück zum Zitat R.S. Sampaio, R.J. Fruehan and B. Ozturk: Trans. ISS, 1993, vol. 14, pp. 59-67. R.S. Sampaio, R.J. Fruehan and B. Ozturk: Trans. ISS, 1993, vol. 14, pp. 59-67.
7.
Zurück zum Zitat E.T. Turkdogan: Metall. Mater. Trans. B, 1978, vol. 9, pp. 163-79.ADS E.T. Turkdogan: Metall. Mater. Trans. B, 1978, vol. 9, pp. 163-79.ADS
8.
Zurück zum Zitat A.A. El-Geassy and M.I. Nasr: Iron Steel Inst. Jpn., 1988, vol. 28, no. 8, pp. 650-8. A.A. El-Geassy and M.I. Nasr: Iron Steel Inst. Jpn., 1988, vol. 28, no. 8, pp. 650-8.
9.
Zurück zum Zitat H.Y. Sohn and J. Szekely: Chem. Eng. Sci., 1972, vol. 27, no. 4, pp. 763.CrossRef H.Y. Sohn and J. Szekely: Chem. Eng. Sci., 1972, vol. 27, no. 4, pp. 763.CrossRef
10.
Zurück zum Zitat S.P. Trushenski, K. Li and W.O. Philbrook: Metall. Trans., 1974, vol. 5, pp. 1149-58.CrossRef S.P. Trushenski, K. Li and W.O. Philbrook: Metall. Trans., 1974, vol. 5, pp. 1149-58.CrossRef
11.
Zurück zum Zitat J. Szekely, J.W. Evans and H.Y. Sohn: Heterogeneous Reaction Kinetics, Academic Press, Washington, DC, 1976. J. Szekely, J.W. Evans and H.Y. Sohn: Heterogeneous Reaction Kinetics, Academic Press, Washington, DC, 1976.
12.
Zurück zum Zitat J. Szekely and J.W. Evans: Metall. Trans., 1971, vol. 2, pp. 1691-711.CrossRef J. Szekely and J.W. Evans: Metall. Trans., 1971, vol. 2, pp. 1691-711.CrossRef
13.
Zurück zum Zitat E.T. Turkdogan and J.V. Vinters: Metall. Trans., 1972, vol. 3, pp. 1561-74.CrossRef E.T. Turkdogan and J.V. Vinters: Metall. Trans., 1972, vol. 3, pp. 1561-74.CrossRef
14.
Zurück zum Zitat R.H. Spitzer, F.S. Manning and W. Philbrook: Trans. Metall. Soc. AIME, 1966, vol. 236, no. 5, pp. 726. R.H. Spitzer, F.S. Manning and W. Philbrook: Trans. Metall. Soc. AIME, 1966, vol. 236, no. 5, pp. 726.
15.
Zurück zum Zitat W.M. Mckewan: Trans. Am. Inst. Mining Metall. Eng., 1958, vol. 212, pp. 791–93. W.M. Mckewan: Trans. Am. Inst. Mining Metall. Eng., 1958, vol. 212, pp. 791–93.
16.
Zurück zum Zitat R.H. Tien and E.T. Turkdogan: Metall. Trans., 1972, vol. 3, pp. 2039-48.CrossRef R.H. Tien and E.T. Turkdogan: Metall. Trans., 1972, vol. 3, pp. 2039-48.CrossRef
17.
Zurück zum Zitat S.R. Story and R.J. Fruehan: Metall. Mater. Trans. B, 2000, vol. 31, pp. 43-54.CrossRef S.R. Story and R.J. Fruehan: Metall. Mater. Trans. B, 2000, vol. 31, pp. 43-54.CrossRef
18.
19.
Zurück zum Zitat G.R. Youngquist: Flow Through Porous Media, American Chemical Society, Washington, DC, 1970 G.R. Youngquist: Flow Through Porous Media, American Chemical Society, Washington, DC, 1970
20.
Zurück zum Zitat A. Wheeler: Reaction Rates and Selectivity in Catalyst Pores, in Advances in Catalysis and Related Subjects, Academic Press, Washington, DC, 1951. A. Wheeler: Reaction Rates and Selectivity in Catalyst Pores, in Advances in Catalysis and Related Subjects, Academic Press, Washington, DC, 1951.
21.
Zurück zum Zitat T. Murayama, Y. Ono and Y. Kawai: Iron Steel Inst. Jpn., 1977, vol. 63, no. 7, pp. 1099-107. T. Murayama, Y. Ono and Y. Kawai: Iron Steel Inst. Jpn., 1977, vol. 63, no. 7, pp. 1099-107.
22.
Zurück zum Zitat R.D. Doherty, K.M. Hutchings, J.D. Smith and S. Yörük: Metall. Mater. Trans. B, 1985, vol. 16, pp. 425-32.ADS R.D. Doherty, K.M. Hutchings, J.D. Smith and S. Yörük: Metall. Mater. Trans. B, 1985, vol. 16, pp. 425-32.ADS
24.
Zurück zum Zitat K. Piotrowski, K. Mondal, T. Wiltowski, P. Dydo and G. Rizeg: Chem. Eng. J., 2007, vol. 131, no. 1-3, pp. 73-82.CrossRef K. Piotrowski, K. Mondal, T. Wiltowski, P. Dydo and G. Rizeg: Chem. Eng. J., 2007, vol. 131, no. 1-3, pp. 73-82.CrossRef
25.
Zurück zum Zitat T. Ariyama, S. Isozaki, S Matsubara, H. Kawata, K. Kondo and I. Kobayashi: J. Iron Steel Inst. Jpn., 1993, vol. 79, no. 12, pp. 1323-28. T. Ariyama, S. Isozaki, S Matsubara, H. Kawata, K. Kondo and I. Kobayashi: J. Iron Steel Inst. Jpn., 1993, vol. 79, no. 12, pp. 1323-28.
26.
Zurück zum Zitat N. Towhidi and J. Szekely: Metall. Trans. B, 1983, vol. 14, pp. 359-67.CrossRef N. Towhidi and J. Szekely: Metall. Trans. B, 1983, vol. 14, pp. 359-67.CrossRef
27.
Zurück zum Zitat D. Wagner, O. Devisme, F. Patisson, and D. Ablitzer: Sohn International Symp., San Diego, CA, 2006. D. Wagner, O. Devisme, F. Patisson, and D. Ablitzer: Sohn International Symp., San Diego, CA, 2006.
28.
Zurück zum Zitat N.A. Warner: Trans. Metall. Soc. AIME, 1964, vol. 230, pp. 163-76. N.A. Warner: Trans. Metall. Soc. AIME, 1964, vol. 230, pp. 163-76.
29.
Zurück zum Zitat R. Corbari: Ph.D. Thesis, Carnegie Mellon, Pittsburgh, PA, 2008. R. Corbari: Ph.D. Thesis, Carnegie Mellon, Pittsburgh, PA, 2008.
30.
31.
Zurück zum Zitat R.M. German: Sintering Theory and Practice, Wiley, New York, NY, 1996. R.M. German: Sintering Theory and Practice, Wiley, New York, NY, 1996.
Metadaten
Titel
Reduction of Iron Oxide Fines to Wustite with CO/CO2 Gas of Low Reducing Potential
verfasst von
R. Corbari
R.J. Fruehan
Publikationsdatum
01.04.2010
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions B / Ausgabe 2/2010
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-009-9315-2

Weitere Artikel der Ausgabe 2/2010

Metallurgical and Materials Transactions B 2/2010 Zur Ausgabe

    Marktübersichten

    Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen.