Using similitude principle and hydrokinetics theory

the water simulation and mathematic simulation of molten steel flow condition in ladle furnace (upper and bottom diameter- 2 310 mm and 1 984 mm

height of ladle furnace- 2 620 mm

porous block diameter- 104 mm) have been carried out by conductivity testing and Phoenics software. The test and results showed that the molten steel flow pattern and mixing time at 2

#

blowing location (520 mm from ladle bottom center) was more idea than that at 1

#

blowing location (354 mm from ladle bottom center) ； and as argon flow rate no more than 300 L/min

with increasing blowing rate the mixing time decreased

as aigon flow rate more than 300 L/min

with further increasing blowing rate the mixing time no longer change. The results of 40 t BOF-LF-CC production showed that with using optimum process the

total oxygen content in steel decreased by 2x 10

-6

to 15.2 X 10

-6

and the amount of inclusion in steel decreased obviously.