<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1報) : 界面反応律速モデルによる検討

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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 dense wustite was prepared in a crucible made of iron by melting the mixture composed of metallic iron, Fe_2O_3 and CaO. The dense wustite plates were kept in CO-CO_2 mixtures at 1200℃ so that the concentration of cation vacancies in the wustite is constant. The following results were obtained : (1) The rate of reduction of the wustite is promoted by the addition of a small amount of CaO. (2) The sizes of pores formed in the reduced layer of the wustite containing CaO are smaller and their numbers are larger than those of the pure wustite, when observed with SEW. (3) The experimental results are analysed by the model that the rate of reduction is controlled at the oxide-metal interface, and the apparent reaction rate constants kINT is made possible to express by the following equation : [numerical formula]
東北大学の論文
1976-03-30