Reduction behavior of packed bed of sinter reduced by CO-CO2-H2-H2O-N2 gas

Tatsuya Kon, Ryo Saito, Shigeru Ueda, Shungo Natsui, Ryo Inoue, Tatsuro Ariyama

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To mitigate CO2 emission from a blast furnace, the use of H2 as a reducing agent is considered to be a prominent method. Reduction of iron ore was reported to be improved by H2 addition. In the present research, reduction in a sinter-packed bed by CO and H2 was carried out under various oxygen partial pressures, and the influence of reduction atmosphere on the reaction behavior was investigated. It was confirmed that the reduction rates were higher when using H2/H2O and CO/CO2/H2/H2O mixtures than when using a CO/CO2 gas mixture. The reaction rate constant for iron ore reduction was determined from the experimental result using a numerical model. The influence of the water-gas shift reaction on the reduction rate was analyzed by comparing the results obtained using the numerical model and those in the experiments. Moreover, the longitudinal distribution of the reaction rate in the packed bed was analyzed to examine the influence of the water-gas shift reaction.

Original languageEnglish
Pages (from-to)1213-1222
Number of pages10
JournalIsij International
Volume55
Issue number6
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Blast furnace
  • Hydrogen
  • Reduction
  • Sinter ore

ASJC Scopus subject areas

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

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