Prediction of two phase flow behavior and mixing degree of liquid steel under reduced pressure

Abstract

The behavior of gas-liquid two-phase flow in a vessel under reduced pressure was evaluated, and the deviation between the theoretical and measured concentration in the ladle was measured using a water model. The fluid flow trajectory and mixing behavior between the fresh and stale solutions in the vessel under different degrees of vacuum were predicted. The flow in the up-leg changed from a dispersed bubble flow regime to a coalescence bubble flow regime as the degree of vacuum decreased. After reaching the ultimate degree of vacuum, the flow was a discrete bubble flow regime if the amount of liquid in the vacuum chamber was greater than the processing capacity of the chamber. There were many dead zones and local circulation phenomena in the ladle. Even in the best mixing case in the experiment, there was an obvious deviation between the measured and theoretical conductivity values in the upper part of the ladle, and the difference increased as the degree of vacuum decreased.