ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Method of Estimation of Reduction Rate Constant in Ishida-Wen’s Model for FeO–Al2O3 Briquette
Chikashi Kamijo
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2017 Volume 57 Issue 10 Pages 1797-1803

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Abstract

A new estimation method of reduction rate constant in Ishida-Wen’s model, which be considered forming of reaction layer, for oxide aggregate such as sinter ore is proposed. Briquettes of FeO–Al2O3 mixture were prepared as a model of sinter ore and reduction test and analysis were taken place. Al2O3 cannot be reduced under this experimental condition so that it acts as a neutral material which obstruct reduction of FeO. Therefore, the influence of existence of Al2O3 in FeO–Al2O3 briquette on the reduction rate of FeO becomes clear. FeO–Al2O3 briquettes were reduced by H2 at 1173 K, and reduction rate constant kv were defined by Murayama’s method. As a result, kv of FeO–Al2O3 briquettes can be described as kv=ϕFeOkv°, where ϕFeO is volume ratio of FeO in FeO–Al2O3 briquette and kv° is reduction rate constant of pure FeO briquette.

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© 2017 by The Iron and Steel Institute of Japan
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