Optimization of the blowing sequence in a top and bottom blowing converter containing pretreated hot metal

Yoshiei Kato, Yukio Takahashi, Toshikazu Sakuraya, Tetsuya Fujii, Shigeru Omiya

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Experimental and theoretical studies have been carried out to clarify metallurgical reactions in combined blowing converters affected by the oxygen flow rates from the top and the bottom of the furnace. The 5t combined blowing converter showed a decrease in oxygen content in the bath with in increase in the oxygen flow rate from the bottom, while the 5t bottom blowing converter showed a decrease in oxygen content with a decrease in the oxygen flow rate. These experimental results are interpreted in terms of an index, I, related to the inverse of the oxygen efficiency used for decarburization. Oxygen content in the steel melt and (T.Fe) in slag decrease with the decrease in the I value from LD to Q-BOP, which indicates that I is suitable for characterizing metallurgical reactions. The metallurgical reactions at blow end can be controlled by changing the oxygen flow rates of top and bottom blowing, based on the aimed I value.

Original languageEnglish
Pages (from-to)560-567
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume76
Issue number4
DOIs
Publication statusPublished - 1990

ASJC Scopus subject areas

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

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