260t转炉用五孔旋流氧枪的数值模拟

Numerical Simulation of Five-Hole Swirl Oxygen Lance for a 260 t Converter

为克服传统氧枪在转炉炼钢工艺技术中的局限性,利用数值模拟对不同结构的五孔旋流氧枪进行模拟研究,分析了旋流氧枪的倾斜角(13°~15°)、旋流角(0~15°)对射流的衰减、聚并形态和冲击面积的影响。结果表明:与普通氧枪相比,旋流氧枪的射流速度较低,但因存在切向力,对熔池的搅拌能力更强;倾斜角增大会导致射流径向的速度分量增大;旋流氧枪由于旋流角的作用,发生射流聚并的可能性降低;倾斜角对射流的聚并有重要影响,倾斜角减小,射流聚并更加严重并且射流冲击面积会减小;当倾斜角15°并且旋流角为10°时冲击面积最大。

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