The simulation test on optimization of 250 t ladle bottom argon blowing location has been carried out by using geometric similarity 1： 3 water model

and the liquid mixing time with single nozzle blowing

90° angle double nozzle blowing and 180° angle symmetric double nozzle blowing at different blowing rate (5 ~ 25 m

3

/h) and different distance from center of ladle (0. 37 〜0. 61 R) is measured by using conductivity measuring method. Test results show that with single nozzle bottom argon blowing and nozzle distance from center of ladle bottom 0. 61 R ( radius of ladle bottom)

the mixing time of liquid is shortest ； the mixing time of liquid with symmetric double nozzle blowing is shorter than that with single nozzle blowing

and with increasing the distance from center of ladle bottom form 0. 37 R to 0. 61 R

the mixing time of liquid obviously decreases

therefore the mixing time of liq

uid with 0. 61 R symmetric double nozzle blowing is shortest and the dead area is minimum.