ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
Ironmaking
Kinetics of Dissolution of SiO Gas in Liquid Fe–C Alloys
Joon Seok OhHyun Soo KimJeoungho LeeSukkwang JungJoonho Lee
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2018 Volume 58 Issue 12 Pages 2246-2252

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Abstract

The dissolution rate of SiO gas in liquid iron (Fe-2 wt% C and Fe-4 wt% C alloys) was investigated at 1843, 1868, and 1893 K. SiO gas was generated from a silica-graphite particle mixture, and then, it was introduced onto the surface of liquid iron through an alumina lance with CO carrier gas. The effect of gas-phase mass transfer on the dissolution rate of SiO gas was minimized by adjusting the CO gas flow rate. The rate of silicon transfer remained almost constant regardless of the initial carbon content in liquid iron, whereas it increased with increasing temperature. From the experimental results, it was concluded that the adsorption of SiO gas onto the surface of liquid iron was the rate-determining step.

Variation of natural logarithm of rate constant with reciprocal of absolute temperature [■ Present work (Cinit.=2 wt%) ● Present work (Cinit.=4 wt%) △ Tsuchiya et al.9) (Cinit.=0 wt%) ▽ Tsuchiya et al.9) (Cinit.=2.78 wt%) ◇ Tsuchiya et al.9) (Csat.)]. Fullsize Image
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© 2018 by The Iron and Steel Institute of Japan
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