Abstract: The influence of oxygen pressure (11.46 x 10⁵ Pa and 6. 88 x 10⁵ Pa) and oxygen lance level ( 1.2-1.5 m) on jet characteristics and impact of liquid surface of 100 t top-blown oxygen converter at steel words is studied by using Fluent fluid software and standard k-e turbulence model. Results show that with increasing oxygen pressure the high speed region of oxygen in converter enlarges, the length of jet key area increases and the pressure energy of jet enhances ; with oxygen pressure 11.46 x 10⁵ Pa, as oxygen lance level is raised from 1.2 m to 1.5 m, the max impact speed of oxygen flow at liquid surface decreases from 240 m/s to 194 m/s and the high speed region reduces, the depth of liquid cavity decreases from 0.37-0.43 m to 0.30-0.36 m while the max diameter of liquid cavity enlarges from 0.70-0.80 m to 0.80-0.95 m.

Key words: 100 t Top-Blown Oxygen Converter, Oxygen Lance, Jet Characteristics, Numerical Simulation, Lance Level, Oxygen Pressure, Liquid Cavity

摘要： 通过利用Fluent流体软件及标准κ-ε方程模型,研究氧气压力(11.46×10⁵Pa和6.88×10⁵ Pa)及氧枪位置(1.2~1.5 m)对钢厂100 t顶吹转炉氧枪射流特性及钢液表面冲击的影响。结果表明,随氧气压力的增大,氧气在转炉内高速区范围变大,射流核心段长度变长,且气流的压能增加;氧气压力为11.46×10⁵Pa时,当枪位由1.2 m提到1.5 m时,钢液表面氧气流最大冲击速度由240 m/s降低至194 m/s,高速区面积减少,钢液凹坑深度由0.37~0.43 m降至0.30~0.36 m,同时凹坑最大直径由0.70~0.80 m增至0.80~0.95 m。

关键词: 100t顶吹转炉, 氧枪, 射流特性, 数值模拟, 枪位, 氧气压力, 钢液凹坑