The effect of number ( 1〜4) and distribution of bottom blown porous bricks of 100 t top-bottom combined blown converter at steel works on flow field of liquid and mixing time has been studied by using Fluent software for fluid. Results show that with different number and configuration of bottom blown porous bricks the flow conditions and stirring results are different. With gross bottom gas flow rate 100 m

3

/h

the liquid mixing time of liquid with single porous brick is longest

i. e. 380 s

the mixing time of liquid with double porous bricks located asymmetrically on the cross at furnace bottom is shortest that is 204 s

while the flowing configuration is planar-symmetrical distribution of 4 bottom porous bricks with liquid mixing time 255 s.