Metallurgical Transactions B

, Volume 12, Issue 2, pp 319–326 | Cite as

The effects of nucleation and growth on the reduction of Fe2O3 to Fe3O4

  • P. C. Hayes
  • P. Grieveson
Solid State Reactions

Abstract

The kinetics of reduction of hematite powder to magnetite in CO-CO2 gas mixtures at temperatures between 500 and 663 °C have been measured. The reactions are described in terms of a simple nucleation and growth model. The chemical reaction rate constants for the reduction of hematite to magnetite are obtained and the nucleation frequencies of magnetite on hematite are calculated for a range of temperatures and oxygen partial pressures. A possible technique for the improvement of the “reducibility” of dense hematite ores is suggested.

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Copyright information

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

Authors and Affiliations

  • P. C. Hayes
    • 1
  • P. Grieveson
    • 2
  1. 1.Department of Mining & Metallurgical EngineeringUniversity of QueenslandBrisbaneAustralia
  2. 2.Metallurgy DepartmentImperial CollegeLondonUK

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