摘要
为解决转炉冶炼过程中高温与炉气变化显著影响氧枪超音速射流特性,而不同冶炼时期射流特性变化规律研究有限的问题,通过CFD数值模拟研究了不同温度下炉气成分对转炉炼钢过程中超音速氧气射流特性的影响。结果表明,相同炉气浓度下,高温(1873 K)时氧枪射流核心区长度是常温(298 K)时的2.6倍;超音速区长度随炉气CO浓度升高而线性增长,且在高温时增长更快,CO浓度提升20%,常温时核心段长度延长0.048 m,高温时延长0.126 m;CO浓度升高增大氧气射流有效冲击面积,常温时最大提升11.6%,高温时提升3.1%。常温时有效冲击面积随枪位升高先增大后减小,而高温下则持续增大;冶炼中期较高的CO浓度和环境温度更利于减缓射流衰减并扩大有效冲击面积。
To address the issue that high temperatures and significant furnace gas variations during converter steelmaking substantially affect the characteristics of supersonic oxygen jets,while research on the changing patterns of jet characteristics across different smelting stages remains limited,the effect of furnace gas composition on supersonic oxygen jet characteristics in converter steelmaking under different temperatures was investigated through CFD numerical simulation.The results indicate that at the same furnace gas concentration,the core length of the oxygen lance jet at high temperature(1873 K)is 2.6 times longer than at room temperature(298 K).The length of supersonic zone increases linearly with rising CO concentration in the furnace gas,with a more pronounced growth rate at elevated temperatures.A 20%in crease inCO concentration extends the core length by 0.048 m at room temperature and by 0.126 m at high temperature.The increase of CO concentration enlarges the effective impact area of the oxygen jet,with a maximum increase of 11.6%at room temperature and 3.1%at high temperature.At room temperature,the effective impact area initially increases and then decreases as the lance height rises,whereas it continues to expand under high-temperature conditions.During the midblowing stage,higher CO concentration and ambient temperature contribute more effectively to slowing jet attenuation and expanding the effective impact area.
作者
张笑龙
冯亮花
Zhang Xiaolong;Feng Lianghua(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《特殊钢》
2026年第2期32-40,共9页
Special Steel
基金
国家自然科学基金资助项目(52074151)
辽宁省科学技术厅资助项目(2022 JH2/101300079)。
关键词
200
t转炉
五孔氧枪
数值模拟
射流衰减
炉气成分
200 t Converter
Five-hole Oxygen Lance
Numerical Simulation
Jet Attenuation
Furnace Gas Composition
