Reduction rates for the mixture of iron oxide and zinc oxide, and ZnFe2O4 with CO-CO2 gas mixtures. Fundamental studies of zinc extraction by the iron-reduction distillation process (7th report)

Satoshi Itoh, Makoto Ohta, Shigeatsu Nakazawa, Takeshi Azakami

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2 Citations (Scopus)

Abstract

In order to analyze the reduction rates for mixtures of iron oxide and zinc oxide and ZnFe2O4 with CO-CO2 gas mixtures, reduction experiments were carried out in the temperature range from 973 to 1173 K. Experimental data for both the reductions were analyzed in terms of mixed control kinetics based on the isothermal two-interface model in which activities of ZnO and FeO were taken into account. The calculated reduction curves using the rate parameters based on the unreacted core model and activities of ZnO and FeO are in satisfactory agreement with the experimental data for both reductions except the reduction curve of zinc oxide on the experimental condition of 1173 K, 92.0%CO on which the experimental data of zinc oxide exhibited delay compared to the calculated reduction curves. The most suitable condition for the first reduction stage of the iron-reduction distillation process was a temperature of about 973 K.

Original languageEnglish
Pages (from-to)1005-1010
Number of pages6
JournalShigen to sozai
Volume105
Issue number13
DOIs
Publication statusPublished - 1989 Jan 1

ASJC Scopus subject areas

  • Engineering(all)

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