Reduction behavior of EAF slags containing Cr2O3 using aluminum at 1 793 K

Joo Hyun Park, Hyo Seok Song, Dong Joon Min

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The simultaneous reduction kinetics of Cr2O3, MnO, FeO, and SiO2 in the EAF slag by aluminum has been investigated at 1 793 K to understand the reduction mechanism of each oxide in the stainless steelmaking conditions. The reduction degree of MnO reached about 90% and that of FeO and Cr2O3 reached about 80 % for 5 min. The reduction degree of SiO2 continuously increased up to about 55 % for 20 min, followed by a constant value. The reduction of each oxide by aluminum was found to be controlled by the diffusional mass transfer process in slag phase from the simple kinetic analysis. The mass transfer coefficient of each oxide was in order of 'MnO>Cr2O3≅FeO≫SiO 2' in the present system. The reduction rate constant (log K oMO, where MO represents Cr2O3, FeO, MnO, and SiO2) linearly increases by increasing the product of diffusion coefficient and the activity of each oxide (log[D M·aMO]) in the slag.

Original languageEnglish
Pages (from-to)790-794
Number of pages5
JournalISIJ International
Volume44
Issue number5
DOIs
Publication statusPublished - 2004 Jan 1

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Aluminum
Slags
Oxides
Mass transfer
Kinetics
Aluminum Oxide
Steelmaking
Rate constants

All Science Journal Classification (ASJC) codes

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

Cite this

Park, Joo Hyun ; Song, Hyo Seok ; Min, Dong Joon. / Reduction behavior of EAF slags containing Cr2O3 using aluminum at 1 793 K. In: ISIJ International. 2004 ; Vol. 44, No. 5. pp. 790-794.
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abstract = "The simultaneous reduction kinetics of Cr2O3, MnO, FeO, and SiO2 in the EAF slag by aluminum has been investigated at 1 793 K to understand the reduction mechanism of each oxide in the stainless steelmaking conditions. The reduction degree of MnO reached about 90{\%} and that of FeO and Cr2O3 reached about 80 {\%} for 5 min. The reduction degree of SiO2 continuously increased up to about 55 {\%} for 20 min, followed by a constant value. The reduction of each oxide by aluminum was found to be controlled by the diffusional mass transfer process in slag phase from the simple kinetic analysis. The mass transfer coefficient of each oxide was in order of 'MnO>Cr2O3≅FeO≫SiO 2' in the present system. The reduction rate constant (log K oMO, where MO represents Cr2O3, FeO, MnO, and SiO2) linearly increases by increasing the product of diffusion coefficient and the activity of each oxide (log[D M·aMO]) in the slag.",
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Reduction behavior of EAF slags containing Cr2O3 using aluminum at 1 793 K. / Park, Joo Hyun; Song, Hyo Seok; Min, Dong Joon.

In: ISIJ International, Vol. 44, No. 5, 01.01.2004, p. 790-794.

Research output: Contribution to journalArticle

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