<報文>石灰を含有する緻密なウスタイトの還元に関する研究(第2報) : 未反応核モデルによる検討

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The dense wustite plates containing 0 to 4 wt pct CaO were reduced in CO-CO_2 mixtures over a temperature range of 800° to 1000℃. The experimental results were analysed by the unreacted core model and the rate parameters were determined. The reduction rate constant k of the pure wustite at 1,000℃ is increased by 27 times in case of addition of 0.5 wt pct CaO but not increased further regardless of increaces of CaO content. At 900℃ the reduction rate contant k shows the same tendency as at 1000℃, but at 800℃ k increases with further addition of CaO. The effect of concentration of vacancy on the reduction rate in pure wustite is distinguished, but in the case of wustite containing CaO, the reduction rate is much increased, but the effect of the vacancy y is not so substantial. The activation energy of k and D_e of the wustite containing CaO are found to be about -29.5Kcal/mole and -24.4 Kcal/mole, respectively, from the following equations : [numerical formula] [numerical formula] The Labyrinth factor ζ in the reduced iron layer is given by the following equation : [numerical formula]
東北大学の論文
1976-03-30