Diffusion in Iron Oxide Melts

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Other Title
  • 酸化鉄融液中の拡散
  • サンカテツユウエキ チュウ ノ カクサン

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The interdiffusivity of iron and oxygen in iron oxide melts has been measured by the capillary method in a temperature range from 1430 to 1550°C and for a composition range from r (=Fe3+/ΣFe)=0.12 to 0.42. At 1550°C, the interdifrusivity is 4×10-4-5×10-5cm2/sec, which is very high as compared with the diffusivity of silicate slags. Activation energies for diffusion are 10.7±0.6 and 16.6±0.2 kcal/mol at r=0.12 and 0.33, respectively. The diffusivity decreases with increase of r.<BR>At higher Fe3+ content (r>-0.25), this decrease of diffusivity becomes to a larger extent. The observed results are interpreted with relation to the constitution of the melts and other properties such as electrical conductivity and viscosity.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 54 (12), 1199-1203, 1968

    The Iron and Steel Institute of Japan

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