Study on the Reduction Process of Iron Oxide Pellets in Isothermal Fixed Bed

概要

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A mathematical model for the isothermal fixed bed and one of the numerical calculating method for this model are presented in this paper. The reaction rate accepted in this model is determined on the basis of the rate observed for single iron oxide pellet. In order to clarify the availability of the mathematical model for analyzing the metallurgical reactors, change in the average fractional reduction over the whole bed with the progress of time was observed during the reduction of iron oxide pellets with CO and H_2 by the use of the experimental fixed bed. The observed data are in good agreement with the calculated curves except in the case where the pellets cracked badly during the reduction. It is, therefore, found that the distributions of process variables in isothermal fixed bed can be estimated with the considerable accuracy by the model mentioned above, and that the reaction rates of pellets with CO and H_2 used in this paper are expected to be available for the process analysis of metallurgical reactors.
東北大学の論文