Based on process parameters of a 300 t RH-MFB unit
the three-dimension mathematical model for liquid steel flow in whole unit has been established. The gas-liquid two-phase flow was treated and described by double-fluid model to analyze the effect of argon flow rate
vacuum
number and location of nozzles on liquid steel flow field and circuiting flow rate. Results show that as argon blowing rate is less than 4 000 L/min
with increasing argon blowing rate
the circuiting flow rate increases; and it is available for the unit with 67 Pa
argon blowing rate 3 500 L/mint immersion pipe immersing 600 mm and 16 nozzles arranging in interleaving way.