高炭素領域における溶鉄の脱炭反応機構に関する研究

概要

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A kinetic study of decarburization has been done by blowing CO-CO_2 gas mixtures onto the inductively stirred Fe-C melts under various conditions. At high carbon contents, the apparent rate of decarburization is independent of carbon concentration and markedly influenced by the flow rate of CO-CO_2 gas mixture. Temperature dependence of the rate is relatively small. A reaction model involving the counter diffusion of CO and CO_2 in gas phase and the adsorption of CO_2 on the liquid iron surface has been developed. It is concluded that at high carbon contents the rate of decarburization is controlled predominantly by the diffusion rate in gaseous phase. It is also presumed that the rate constant of adsorption of CO_2 on the liquid iron surface is higher than 0.001 mol/cm^2・sec・atm, which is consistent with the extrapolated value of the reection constant for solid Fe-C alloy.
社団法人日本鉄鋼協会の論文
1971-08-01