In order to overcome the limitation of traditional oxygen lance in converter steelmaking technology

the five- hole swirl oxygen lance with different structure parameters is simulated study by numerical simulation. The effects of  the tilt angle (13° ~15°) and swirl angle (0 - 15°) of swirl oxygen lance on jet attenuation

coalescence morphology and impact area are analyzed. The results show that the jet velocity of the swirl lance are lower than that of the ordinary lance

but the stirring capacity to the molten pool is stronger because of the tangential force； the increase of the inclination angle will increase the radial velocity component of the jet； the possibility of jet coalescence will be reduced because of the effect of the swirl angle. The tilt angle has an important effect on the jet coalescence

with the decrease of tilt angle

the coalescence of jet is more serious

and the impact area of jet decreases. When the inclination angle is 15° and the swirl angle is 10°

the impact area is largest.