Kinetics of the Decarburization of Molten Fe-Cr Alloy with CO2-CO-Ar Mixture or Chromic Oxide
1979 Volume 65 Issue 1 Pages 53-59
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1979 Volume 65 Issue 1 Pages 53-59
Measurements have been done on the decarburization rate of the levitated Fe-13%Cr droplets with CO2-CO and CO2-Ar mixtures. The decarburization with CO2-CO mixture proceeded by keeping the value of %C×%O constant in the extent of no oxide appearance. The rate equation obtained from the analysis of the decarburization of molten iron was applied to the experimental results. It was confirmed that the reaction was determined by the mass transfer between the two phases. Also measurements have been done on the decarburization of the molten alloy in Ar atmosphare with chromic oxide, which is formed during the reaction with CO2-Ar mixture. It was estimated from the consideration that the reduction rate of the chromic oxide with carbon dissolved in the molten alloy was determined by the dissolution rate of the chromic oxide at the high concentration of carbon and by the transfer of carbon to the interface of the reaction with oxygen dissolved from the oxide at the low concentration of carbon.
