Physical Simulation of Bubble Behavior in Liquid Steel Under the Condition of High Pressure and Bottom Blowing

In order to explore the existence form and movement form of the gas in liquid metal under the condition of high pressure,a serial of water model experiments had been carried to obtain the effect of pressure and bottom flow rate on the shape,diameter,quantity of bubble and slag eye area.The experimental results indicate that compared with atmospherica pressure,when increasing bottom blowing flow rate,high pressure cause air bubbles generated tend to be much round,and the average bubble diameter decreases and the number of bubbles increases.When the bottom blowing flow rate is 4 L/h,the change of bubble diameter and shape is most remarkable.When at constant flow rate and bottom blowing position,with the increase of the pressure,the bubble shape gradually tend to round,air bubble diameter became smaller,the the number of bubble increase gradually, "slag eye" area gradually decreases.Under the condition of normal pressure and high pressure,when bottom blowing flow after excesses 5 L/h,the change of bubble diameter and shape is not obvious.When the bottom blowing flow rate is at 4 L/h and pressure is at 0.5 MPa,the change of average bubble diameter and shape is very small.This research result can provid reference for the development of high pressure metallurgy.