Mechanism of iron oxide reduction by simulated volatiles

Il Sohn, Richard J. Fruehan

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

In ironmaking processes using coal-ore pellets or mixtures, it is possible that volatiles can contribute to reduction. In particular with deep beds or multiple pellet layers that has high temperature gradients from the top to lower layers, the lower material will release their volatiles when the upper level is at temperatures where reduction can occur. Therefore, as part of understanding the fundamental mechanisms associated with volatile reduction, the rate of iron ore reduction by hydrogen at lower temperatures was studied. Results have shown hydrogen reduction to be significant above 500°C and indicate a mixed control mechanism of nucleation, mass transfer and chemical kinetics.

Original languageEnglish
Pages (from-to)325-336
Number of pages12
JournalAISTech - Iron and Steel Technology Conference Proceedings
Volume1
Publication statusPublished - 2004 Dec 1

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Iron oxides
Iron ore reduction
Ore pellets
Hydrogen
Reaction kinetics
Thermal gradients
Nucleation
Mass transfer
Coal
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "In ironmaking processes using coal-ore pellets or mixtures, it is possible that volatiles can contribute to reduction. In particular with deep beds or multiple pellet layers that has high temperature gradients from the top to lower layers, the lower material will release their volatiles when the upper level is at temperatures where reduction can occur. Therefore, as part of understanding the fundamental mechanisms associated with volatile reduction, the rate of iron ore reduction by hydrogen at lower temperatures was studied. Results have shown hydrogen reduction to be significant above 500°C and indicate a mixed control mechanism of nucleation, mass transfer and chemical kinetics.",
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Mechanism of iron oxide reduction by simulated volatiles. / Sohn, Il; Fruehan, Richard J.

In: AISTech - Iron and Steel Technology Conference Proceedings, Vol. 1, 01.12.2004, p. 325-336.

Research output: Contribution to journalConference article

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N2 - In ironmaking processes using coal-ore pellets or mixtures, it is possible that volatiles can contribute to reduction. In particular with deep beds or multiple pellet layers that has high temperature gradients from the top to lower layers, the lower material will release their volatiles when the upper level is at temperatures where reduction can occur. Therefore, as part of understanding the fundamental mechanisms associated with volatile reduction, the rate of iron ore reduction by hydrogen at lower temperatures was studied. Results have shown hydrogen reduction to be significant above 500°C and indicate a mixed control mechanism of nucleation, mass transfer and chemical kinetics.

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