1990 Volume 30 Issue 5 Pages 356-361
Residence time of metal droplets generated by an oxygen jet impinging on molten bath surface in the slag was investigated in a 3-D two phase (mercury/glycerine) model. The residence time (τ =Q2/q1) was obtained from measurements of the amount of emulsified mercury in glycerine at steady state (Q2) and the drop generation rate (q1). It has been found that the mean residence time increases with increasing top gas flow rate and decreases with increasing bottom gas flow rate. Also, it increases at first and then decreases with increasing lance height. Maximum mean residence time was achieved at a certain lance height.