Effect of alkali metal on gas-solid reduction of iron oxide

Wen Pan, Keng Wu, Yong Zhao, Zhi Xing Zhao, Dong Joon Min

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Fe2O3 and Fe2O3 doped with Na2O from 1.0 to 5.0 mass percent compacts were isothermally reduced at various temperatures from 1073 to 1273K with CO/CO2 mixed gas in a vertical resistance furnace. To determine the effect of Na2O on the reduction of Fe2O3 compacts, mass loss due to oxygen removal was continuously recorded from which the reduction rate and rate constant was obtained. The morphology change was also observed by SEM. The results show that Na2O retards the reduction of Fe2O3 compacts. Morphological examination of reduced compacts and the binary phase diagram of FeO-Na2O show liquid phase formation during the reduction, which decreases the rate of reduction. Porosity and volumetric expansion of reduced compacts were investigated, which shows that the volume and porosity of reduced Fe2O3-Na2O compacts are both decreased with higher Na2O content due to the existence of liquid phase.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
JournalKang T'ieh/Iron and Steel
Volume48
Issue number6
Publication statusPublished - 2013 Jun 1

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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