In accordance with the issue of poor homogeneity of composition and temperature of liquid in 150 t ladle bottom-argon-blowing with double nozzle located at 0. 2 R circumference in angle 90°

a test by using geometric similarity 1：4 water model with double nozzle location 0. 2 ~ 0. 8 R

in angle 45° ~ 180°

blowing rate 54. 6 ~491. 4 L/h (corresponding 150 t ladle blowing rate 50 -450 L/min) has been carried out. Test results show that as compared with original ladle nozzle location

for the optimum scheme- double radius 0. 6 R circumference

in angle 180° and each nozzle flow rate 382. 2 L/h (corresponding 150 t ladle 350 L/min) the mixing time of liquid decreases by 28. 6%.