ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
Regular Article
Effect of Alumina and Silica on the Reaction Kinetics of Carbon Composite Pellets at 1473 K
Hyunsik ParkVeena Sahajwalla
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2014 Volume 54 Issue 1 Pages 49-55

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Abstract

The influence of compositional changes in the CaO–FeOt–(Al2O3) or (SiO2) ternary oxide system on the reaction kinetics of carbon composite pellet was investigated by Thermo-Gravimetric Analyzer (TGA) at 1473 K (1200°C). Measured CO and CO2 gas by Infrared gas analyzer and surface area change from BET analysis assisted with the reaction kinetics of carbon composite pellet. As a result, alumina increased the reduction rate of iron oxide by increasing surface area, while silica decreased reduction rate by lowering surface area of pellet samples. A modified reaction kinetic model considering both the Boudouard reaction and surface area variation was developed for a better explanation of reduction mechanisms occurring in carbon composite pellets.

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© 2014 by The Iron and Steel Institute of Japan
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