Lowering reduction temperature of iron oxide using the composite of coal and iron ores containing high concentration of combined water

Taichi Murakami, Takeshi Nishimura, Eiki Kasai

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

Steel industry is facing two difficult tusks to solve simultaneously. These are the reduction of CO2 emissions and the effective use of low-grade iron ore resources with relatively high concentration of combined water. Lowering the reduction temperature of iron oxide using an ore-carbon composite is promising way to solve the former problem. The latter is concerning to goethite ore such as the AustralianMarraMamba and pisolite ores. In this study, effect of the concentration of combined water on the reduction behavior of the composite was examined. The ore-coal composite sample was heated up to 1573 K with the heating rate of 0.33 K/s under inert gas flow. The gas concentration in the outlet was measured to calculate the reduction degree. Below 1200 K, the reduction of iron oxide in Marra Mamba ore-coal and pisolite ore-coal composites proceeded faster than that in hematite ore-coal composite. It can be attributed to the larger specific surface area of the ores after decomposition of the combined water. Above 1373 K, however, the reduction rate of these ores in the composite significantly decreased due to a drastic decrease in the specific surface area of the ores and the formation of slag.

Original languageEnglish
Pages278-282
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

  • Coal
  • Iron ore resources
  • Reduction of CO emission
  • Reduction of iron oxide

ASJC Scopus subject areas

  • Metals and Alloys

Fingerprint Dive into the research topics of 'Lowering reduction temperature of iron oxide using the composite of coal and iron ores containing high concentration of combined water'. Together they form a unique fingerprint.

Cite this