Interfacial kinetics of hydrogen with liquid slag containing iron oxide

Tetsuya Nagasaka, Mitsutaka Hino, Shiro Ban-Ya

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Interfacial kinetics on the hydrogen reduction of liquid FetO in FetO-MxOy slag (MxOy = CaO, SiO2, Al2O3, and TiO2) has been studied at 1673 K. Because the rate of hydrogen reduction was very fast, the rate was controlled by gas-phase mass transfer under most of the experimental conditions. The effect of CaO or SiO2 addition on the interfacial chemical reaction rate of hydrogen reduction was empirically evaluated as a function of the ferrous-ferric ratio in the slag. The observed interfacial chemical reaction rates in FetO-CaO and FetO-SiO2 slags showed reasonable agreement with the estimated values. Most of the available literature data on the reduction rate of liquid iron oxide by solid carbon, hot metal, and reducing gases were also reviewed and compared with the results of the present work. It was found that the rate of hydrogen reduction of liquid iron oxide slag is much faster than that with other reducing agents such as solid carbon, carbon dissolved in the liquid iron, and CO gas.

Original languageEnglish
Pages (from-to)945-955
Number of pages11
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume31
Issue number5
DOIs
Publication statusPublished - 2000 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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