Effect of granule structure on the combustion behavior of coke breeze

Nakagawa Terushige, Nakano Masanori, Nagasaka Tetsuya

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

Iron ore sintering machines in Japan emits 32 Mt CO2 annual, amounting to 2.6 percents of total emission in Japan. Since the exhaust gas contains a few percent of CO, the complete combustion can reduce coke consumption. To obtain the principal for controlling coke combustion in the sintering bed, the present research determined the ignition temperature and the combustion rate of cokes existing in various positions in the granules of sintering raw mixture, which made of coke and one of iron oxide (ore), limestone and alumina. For coarse coke particle, the ore and limestone adhesion lowered the ignition temperature and accelerate the combustion rate. For fine coke particles adhering on various kind of nucleus or coexisting in composite pellet-like granule, neither the ignition temperature nor the combustion rate changed except for a composite pellet-like granule of coke and limestone. The acceleration effect of limestone on coke combustion rate seems to derive from catalysis effect.

Original languageEnglish
Pages195-199
Number of pages5
Publication statusPublished - 2009 Dec 1
Event5th International Congress on the Science and Technology of Ironmaking, ICSTI 2009 - Shanghai, China
Duration: 2009 Oct 202009 Oct 22

Other

Other5th International Congress on the Science and Technology of Ironmaking, ICSTI 2009
CountryChina
CityShanghai
Period09/10/2009/10/22

Keywords

  • Carbon dioxide
  • Coke combustion
  • Iron ore sintering

ASJC Scopus subject areas

  • Metals and Alloys

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