Effect of SiO2 and Al2O3 on high temperature reduction of iron ore

T. Maeda, Y. Fukumoto, M. Shimizu

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6 Citations (Scopus)

Abstract

Five kinds of iron ores that had different SiO2 and Al2O3 content were reduced at temperature range from 1000°C to 1200°C. The effects of SiO2 and Al2O3 on the final stage of the reduction with CO gas were studied. The results obtained are summarized as follows: 1) Ores D (0.64 mass% SiO2, 0.8 mass% Al2O3) and E (0.58 mass% SiO2, 0.6mass% Al2O3) were reduced faster than Ores A (4.64 mass% SiO2, 2.6 mass% Al2O3), B (5.61 mass% SiO2, 2.62 mass% Al2O3) and C (8.46 mass% Si2, 0.83 mass% Al2O3). 2) Ores A and B were reduced slower than Ore C at 1100°C because the formation rate of 2FeO · SiO2 was different among them. The amount of 2FeO · SiO2 phase in Ores A and B was lager than Ore C because the distribution of SiO2 particle was different among them. In the case of Ores A and B, the SiO2 particle was distributed inside or at the edge of hematite particle. On the other hand, the large SiO2 particle in Ore C was separated from hematite particle. 3) Ores D and E were reduced to almost 100% reduction degree at 1200°C, but Ores A, B and C were retarded at low reduction degree at 1200°C because of the melting of 2FeO · SiO2 which was formed during reduction.

Original languageEnglish
Pages (from-to)327-334
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume87
Issue number5
DOIs
Publication statusPublished - May 2001

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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