Effect of stirring force by bottom blown gas and partial pressure of CO in it on characteristics of metallurgical reaction in a converter

Yasuo Kishimoto, Yoshiei Kato, Toshikazu Sakuraya, Tetsuya Fujii

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9 Citations (Scopus)

Abstract

Experiments were carried out in 5 t converter using five kinds of gases as a bottom blown gas. The results obtained are summarized as follows: Independently of the bottom blown gas, oxygen concentration dissolved in steel decreases with increasing gas flow rate of bottom blown gas. Taking into consideration oxygen transfer from metal to slag, the model can reasonably explain the phenomena that concentrations of carbon and oxygen reduce to those in equilibrium with less than 1.0 atm of CO. The amount of oxygen transfer from metal to slag increases with increasing the stirring force by bottom blown gas and decreasing carbon concentration in molten steel. The effect of dilution of PCO on behavior of oxygen concentration in steel and (%T.Fe) in slag is considered to be small. Hence, the decrease of oxygen and (%T.Fe) in IOD(Inert and Oxygen Gases Decarburization) mode result from the increase of stirring intensity by inert gas blown from bottom.

Original languageEnglish
Pages (from-to)1300-1307
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume75
Issue number8
DOIs
Publication statusPublished - Jan 1 1989
Externally publishedYes

ASJC Scopus subject areas

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

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