酸化鉄ペレット単一球の脈動還元反応の速度論的研究

概要

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The fact that the rate of reduction of a hematite pellet under pulsating flow is higher than that under steady flow can de ascribed to the decrease of mass-transfer resistance in the gas film. The rate of reduction under pulsating flow is calculated by the use of an unreacted-core shrinking model and KITAURA'S expression for a mass-transfer coefficient, and the following conclusions are obtained. (1) The rate of reduction under pulsating flow increases as frequency and amplitude of pulsation increase. (2) Pulsating flow accelerates the reduction effectively especially in the early stage of reduction and in a high temperature range. This trend coincides qualitatively with previously reported results. (3) Optimum values of the pellet diameter and time-averaged flow rate are proposed. (4) When the pellet diameter and flow rate are not signiffcantly large, the effect of pulsating flow increases gradually as N_2 gas percentage in binary bulk gas, H_2-N_2, increases.
社団法人日本鉄鋼協会の論文
1973-12-01