A compressible and non isothermal three dimensional VOF model for 260 t converter is established. The characteristics of interaction process between the multi hole supersonic jet and the converter bath are studied and the profile change of interface between the jet and the molten steel is clarified. The mechanism of metal droplet splashing is revealed and the size of the cavity is analyzed quantitatively. The results show that the blowing process has instantaneity

the gas liquid interface becomes unstable and causes splashing with the process of blowing and splashing can coexist in the form of large metal strip and droplet. When the lance distance is 22 m and the flow rate is 53000 m

3

/h

the dead zone area is about 12%~15% of the bottom area

[JP

]

the cavity diameter accounts for about 55% of the pool diameter

and th

e cavity depth accounts for about 30% of the pool depth at formed during blowing. Through the analysis of industrial production practice index

it shows that the by process lance distance 2.2 m and flow rate 53000 m

3

/h

oxygen blowing for 15.2 min

oxygen comsumption 47.7 m

3

/t

the dephosphorizing rate is 83.1% and the charging materials comsumption decreases to 1115 kg/t.