MODEL STUDY OF GAS-LIQUID MOMENTUM TRANSFER TO DESIGN OPTIMUM TUYERE DIMENSION FOR BOTTOM AND TOP/BOTTOM BLOWN CONVERTERS.

Yoshiei Kato, Tsutomu Nozaki, Kyoji Nakanishi, Tetsuya Fujii, Toshihiko Emi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Cold and hot model experiments on gas-liquid momentum transfer have been carried out to optimize the relationship between gas flow rate (Q), diameter (d), and number (N) of tuyeres through which gas is blown into the steel melt. Critical conditions for leakage into the tuyere is given by a constant Froude number. A semi-empirical equation for swelling of the bath surface is derived that involves energy dissipation rate and bath depth. A multiple regression analysis of the amount of spitting observed in cold model experiments has been done to find the influence of operational variables. A momentum balance between the dynamic pressure of the gas jet and the ferrostatic pressure of the bath has been examined to predict drilling of the gas jet through the bath. A region where neither leakage nor drilling occurs has been determined and a method given to optimize the relationship among Q, N, and d for satisfactory bottom blowing operation.

Original languageEnglish
Pages (from-to)380-387
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume70
Issue number3
DOIs
Publication statusPublished - Jan 1 1984
Externally publishedYes

ASJC Scopus subject areas

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

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