Carbothermic reduction of iron oxide and coal composite in packed bed combustion process

Eiki Kasai, T. Kitajima, T. Kawaguchi, T. Nakamura

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Carbothermic reduction of iron oxide is an attractive mechanism to produce metallic iron, since it can directly utilise coal as both reductant and fuel. To improve energy efficiency and productivity of the metallic iron production based on this mechanism, the combustion bed process packed with the composites of iron oxide and coal powder was experimentally evaluated. The process has a potential of high heat efficiency since it can automatically utilise the heat of reduced materials as that necessary to the subsequent reduction of the composite by a large heat exchange rate between the packed particles and gas flowed across the bed. However, it is hard to perfectly prevent the reoxidation of formed metallic iron in the bed. The present paper reports the effect of coal content, pellet size and so forth on the reduction/metallisation degrees of the samples after the reduction experiment. It also discusses the effect of pretreatment of the composite pellets using CaO bearing materials to suppress the reoxidation of formed metallic iron in the bed.

Original languageEnglish
Pages499-507
Number of pages9
Publication statusPublished - 2000 Dec 1
EventInternational Congress on Mineral Processing and Extractive Metallurgy (Minprex 2000) - Melbourne, Australia
Duration: 2000 Sep 112000 Sep 13

Other

OtherInternational Congress on Mineral Processing and Extractive Metallurgy (Minprex 2000)
CountryAustralia
CityMelbourne
Period00/9/1100/9/13

ASJC Scopus subject areas

  • Materials Science(all)

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    Kasai, E., Kitajima, T., Kawaguchi, T., & Nakamura, T. (2000). Carbothermic reduction of iron oxide and coal composite in packed bed combustion process. 499-507. Paper presented at International Congress on Mineral Processing and Extractive Metallurgy (Minprex 2000), Melbourne, Australia.