Abstract: The two dimensional numerical model is established with adding shrouding gas holes around traditional lance oxygen Laval tube for a 90 t LD injecting auxiliary oxygen to protect main oxygen jet and form coherent state, of traditional oxygen lance and coherent lance the oxygen jet velocity distribution at jet axis and the flow characteristics of liquid steel and impact depth in pool with different lance level are analyzed. Results show that as compared with traditional oxygen lance at same lance level the attenuation of jet of coherence oxygen lance is slower, the impact force is stronger and the depth of impact pit is deeper； with lance level 30De (De-diameter of oxygen lance outlet) the max impact depth of coherent lance is just the same that of traditional lance with lance level 20De and the average impact depth of coherent lance with lance level 40De is corresponding to that of traditional lance with lance level 20De.

Key words: Coherent Jet Oxygen Lance, 90 t LD, Pool, Liquid Steel, Impact Depth, Numerical Simulation

摘要： 通过90 t转炉的传统氧枪喷孔周围增加环氧孔,通人辅助氧气保护主氧射流形成聚合状态,建立二维两相数值模型,分析传统氧枪和聚合射流氧枪射流轴线上氧气射流速度分布及不同枪位下熔池中钢液的流动特性和冲击深度。结果表明,与传统氧枪相比,枪位相同时,聚合射流氧枪射流衰减慢,冲击力大,冲击凹坑深度深;在30De(De-氧枪出口直径)枪位下的最大冲击深度与20De枪位下的传统氧枪相同,当聚合射流氧枪在40De枪位下喷吹得平均冲击深度与传统氧枪20De枪位喷吹时相当。

关键词: 聚合射流氧枪, 90t转炉, 熔池, 钢液, 冲击深度, 数值模拟