Physical Simulation for Mizing and Mass Transfer Characteristics during RH Vacuum Refining Process
In order to have a deep insight into the transfer phenomena in RH, a 1:5.5 scale water modeling of the prototype has been developed to investigate the alloying, decarburization and degassing process. The circulation flow rate is measured by the ultrasonic flow meter. Such a measurement method does not affect the flow field in RH vacuum refining degasser. The NaCl saturated solution is added at the free surface in vacuum chamber as the tracer and the digital conductivity meter has been employed to record the variation of tracer concentration. The mixing time is defined as the maximum time for the tracer concentration to fall continuously within a 5 pct deviation of the homogeneous value. The NaOH-CO2 solution system is used to study the decarburization process. The volumetric mass transfer coefficient is obtained by the change of CO2 concentration calculated by the PH value during experimental process. The results shows that with the increasing gas flow rate, the recirculation flow rate, oxygen absorption rate, decarburization rate and volume mass transfer coefficient increases, but the mixing time decreases.
RH vacuum refining volumetric mass transfer coefficient water modeling, mizing characteristics gas-liquid reaction
GENG Dian-qiao LEI Hong LIU Ai-hua HE Ji-cheng YU Yang YU Lei
Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern Unive School of Materials Science and Metallurgy, Northeastern University, Shenyang, Liaoning, 110004, Chi
国际会议
沈阳
英文
164-168
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）