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Kinetics and mechanism of llmenite reduction with graphite

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Abstract

The reduction of synthetic ilmenite with graphite in the solid state has been studied by ther-mogravimetric analysis. The reaction has been observed to initiate near 860°C at the contact points between the reactants. Up to 1020°C solid state reduction appears to be the main reaction mechanism, while above this temperature a rate increase has been observed and has been attributed to a change of mechanism to gaseous reduction of ilmenite by regenerated CO. Microscopic examination and electron probe analysis of the reduced particles have indicated a tendency toward segregation of the products iron and TiO2. Iron particles as large as 80 μ can be obtained by keeping the reduced sample at 1025° to 1075°C for several hours. Reduction rate data under isothermal conditions were fitted to different rate equations and have been found to be well represented by the equation. 1 − 2x/3 − (1 −x)2/3 =K’ This equation is based upon diffusion of reactants through a product layer. CO is suggested as the diffusing species. The activation energy for the reaction in the temperature range 1075° to 1140°C has been calculated to be 64 ± 6 kcal per mole.

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References

  1. F. R. Hartley: Eighth Commonwealth Min. Met. Congress, Aust, New Zealand, 1965, Tech Session 37, Preprint Number 51, pp. 36-48.

  2. Akio Yamaguchi, H. Linuma, and J. Mariyama:Nippon Kinzoku Gakkaishi, 1966, vol. 30, pp. 377–82.

    CAS  Google Scholar 

  3. R. G. Becher, R. G. Canning, B. A. Goodheart, and S. Uusna:Aust. Inst. Min. Met, 1965, Proc. no. 214, pp. 21-44.

  4. M. K. Hussein and S. Z. el-Tawil:Indian J. Tech., 1967, vol. 5, pp. 97–100.

    CAS  Google Scholar 

  5. M. K. Hussein, R. Kamel, and H. Winterhager:Indian J. Tech., 1967, vol. 5, pp. 369–77.

    CAS  Google Scholar 

  6. C. H. Shomate, B. F. Naylor, and F. S. Boericke: U. S. Bur. Mines Rep. of Invest. No. 3864, 1946.

  7. P. L. Walker, Jr.,et al.: Advances in Catalysis, vol. 11, p. 133, Academic Press Inc., New York, 1959.

    Google Scholar 

  8. A. M. Ginstling and B. I. Brounshtein:J. App. Chem. USSR, English Trans., 1950, vol. 23, pp. 1327–38.

    CAS  Google Scholar 

  9. J. Jach:Phys. Chem. Solids, 1963, vol. 24, pp. 63–73.

    Article  CAS  Google Scholar 

  10. A. K. Galwey:Chemistry of Solids, ch. 5, Chapman and Hall Ltd., London, 1967.

    Google Scholar 

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Authors and Affiliations

  1. Refinery Division, Englehard Industries, Newark, N.J.

    M. I. El-Guindy (Group Leader)

  2. McGill University, USA

    W. G. Davenport (Associate Professor)

Authors
  1. M. I. El-Guindy
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  2. W. G. Davenport
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Formerly Research Associate, Department of Metallurgical Engineering, McGill University, Montreal, Quebec, Can.

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El-Guindy, M.I., Davenport, W.G. Kinetics and mechanism of llmenite reduction with graphite. Metall Trans 1, 1729–1734 (1970). https://doi.org/10.1007/BF02642023

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