电弧炉炼钢氧枪优化布置研究

Research on Oxygen Lances Optimized Layout for EAF Steelmaking

为了消除电弧炉熔池中的死区,以电弧炉熔池钢渣液为研究对象,采用CFD数值模拟软件模拟了氧枪氧气射流作用下熔池中钢液、渣液两相的速度场,通过对偏转氧枪水平角度的研究,发现氧枪形成对熔池切向方向上的冲击,使钢液水平面上形成围绕熔池中心旋转的涡流,数模研究表明,其涡流的形成促进了熔池中钢渣液的速度均匀分布,搅动熔池,加速反应,均匀成分和温度。同时,数值模拟与他人所做的水模的射流冲击深度进行了对比,两者反应出的规律一致。

To make the velocity of molten steel more homogeneous in bath, the flow field of molten steel and slag was simulated by CFD package in this work. The result shows that compared with the simulated results of oxygen lance directing to the EAF center, the anticlock- wise circulation in molten bath was formed when the oxygen lance turning 20 degrees anticlockwise. This circulation made the velocity of liquid steel bigger and more homogeneous. It facilitates the homogenization of compositions and temperature of liquid steel in bath, which is beneficial to increase production and reduce tap-to-tap time of EAF steelmaking. The penetration depths conducted by this nu- merical simulation and others＇ water modeling research were compared. It is shown that the result predicted by numerical simulation agrees well with that concluded by water model.