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Fundamental Study on the Stirring of Liquid Iron and the Liquid-Liquid Mass Transfer in Gas Injection System.

Research Project

Project/Area Number 60550466
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 金属精錬・金属化学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

TANIGUCHI Shoji  Faculty of Engineering, Tohoku Univ., Associate Professor, 工学部, 助教授 (00111253)

Co-Investigator(Kenkyū-buntansha) KIKUCHI Atsushi  Faculty of Engineering, Tohoku Univ., Professor, 工学部, 教授 (00005307)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1986: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1985: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsGas Injection / Liquid Iron / Liquid-Liquid Mass Trnsfer / Model Experiment / Volumetric Coefficient / Power Spectrum / コンピュータシミュレーション
Research Abstract

Model experiments by the use of water and its analysis were made in order to obtain fundamental knowledge on the stirring of liquid iron and the liquid-liquid mass transfer by gas injection.
1. Flow in the system: Flow pattern in water and appearance of droplet formation were observed in the water-benzene system stirred by nitrogen. The existence of large recirculating flow in water and the increase in number of benzene of benzene droplets with gas-flow rate were confirmed.
2. Liquid-liquid mass transfer: Transfer rate of acetophenone from benzene to water were measured under the various conditions of gas-flow rate, the height of benzene and water, and the radius of vessel. The results were correlated by two empirical equations-at low gas-flow rate and at high gas-flow rate. At high gas-flow rate, the effect of gas-flow rate on the volumetric coefficient, <k_LA> , was very large because of the benzene-droplet formation. Contribution of droplet formation was estimated by using the empirical equation at low gas-flow rate and the measured results of the amount of droplet in water and its average diameter. Calculated values of <k_LA> agreed well with observed ones.
3. Characteristics of turbulence in the system: Turbulence-analysing system composed of a hot wire anemometer and a FFT analyser was used for the measurements of the distributions of time-averaged velocities and the turbulent kinematic energies. This system was also used for the analysis of power-spectrum of turbulence. It was found that the characteristics of turbulence in the present system was very similar to those of the isotropic turbulence.
4. Simulation of flow: The 0-equation model which is the most fundamental model of turbulence was used for the estimation of the time-averaged distributions of local gas holdup and flow pattern.

Report

(1 results)
  • 1986 Final Research Report Summary

URL: 

Published: 1987-03-31   Modified: 2016-04-21  

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