Effect of Mixed-grinding on Reduction Process of Carbonaceous Material and Iron Oxide Composite
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概要
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Mixing state and structure of composite significantly influence reduction kinetics of carbonaceous materials/iron oxides mixture. The present study reports the effect of mixed-grinding of the mixture on the reduction of the composite by indirect heating. Mixtures prepared by different combinations of hematite and graphite reagents, iron ores and metallurgical coke were mixed-ground by two types of ball mills. TG-DTA measurements for the composites were carried out under different heating patterns and total pressures. Reaction temperature remarkably decreases by the mixed-grinding operation in any combinations of materials and total pressures. A catalytic effect of iron produced during reaction is observed when using graphite reagents but seems to be inhibited when using metallurgical coke. A simple kinetic analysis suggests that gasification of carbon is promoted through enhancement of the catalytic effect and/or change of rate limiting step from the gasification of carbon to the direct reactions between iron oxides and carbon.
- 社団法人 日本鉄鋼協会の論文
- 1995-12-15
著者
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Saito Fumio
Institute For Advanced Materials Processing Tohoku University
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Kasai Eiki
Institute For Advanced Materials Processing Tohoku University
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MAE Katsuhito
Institute for Advanced Materials Processing, Tohoku University
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Kasai Eiki
Institute For Advance Materials Processing Tohoku University
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Mae Katsuhito
Institute For Advanced Materials Processing Tohoku University
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