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高供氧压力下高马赫数氧枪数值模拟
引用本文:张燕超,张彩军,朱立光,周泉林. 高供氧压力下高马赫数氧枪数值模拟[J]. 钢铁, 2019, 54(5): 32-38. DOI: DOI:10.13228/j.boyuan.issn0449-749x.20180319
作者姓名:张燕超  张彩军  朱立光  周泉林
作者单位:华北理工大学冶金与能源学院,河北唐山063000;河北省高品质钢连铸工程技术研究中心,河北唐山063000;华北理工大学冶金与能源学院,河北唐山063000;河北省高品质钢连铸工程技术研究中心,河北唐山063000;华北理工大学冶金与能源学院,河北唐山063000;河北省高品质钢连铸工程技术研究中心,河北唐山063000;华北理工大学冶金与能源学院,河北唐山063000;河北省高品质钢连铸工程技术研究中心,河北唐山063000
摘    要:以北方某钢厂100 t转炉为原型,建立顶吹转炉炉内流场的三维数学模型,采用Fluent软件研究了不同高马赫数氧气射流与熔池钢液速度流场分布之间的依赖关系。研究发现,高马赫数氧枪在Ma(马赫数)为2.0~2.3时,曲线平稳,为最佳供氧压力。在提高供氧压力的同时,氧气射流的最大速度、熔池钢液面的冲击直径及冲击深度也随之增加。模拟结果显示,氧气射流在设计工况氧压小于1.0 MPa时,射流之间相互干扰作用最弱;氧气射流在设计工况氧压力大于1.0 MPa后,冲击直径与冲击深度增幅较小。基于上述研究,在实际生产中应用了高马赫数氧枪后,并结合变枪变压操作工艺,可以改善熔池底部钢液流动状况、稳定转炉吹炼过程、控制炉渣喷溅。

关 键 词:氧枪  高马赫数  数值模拟  供氧压力  速度流场
收稿时间:2018-08-13

Numerical simulation of high Mach number oxygen lance under high oxygen pressure
ZHANG Yan-chao,ZHANG Cai-jun,ZHU Li-guang,ZHOU Quan-lin. Numerical simulation of high Mach number oxygen lance under high oxygen pressure[J]. Iron & Steel, 2019, 54(5): 32-38. DOI: DOI:10.13228/j.boyuan.issn0449-749x.20180319
Authors:ZHANG Yan-chao  ZHANG Cai-jun  ZHU Li-guang  ZHOU Quan-lin
Affiliation:(1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063000, Hebei,China; 2. Hebei Engineering Research Center of High Quality Steel Continuous Casting, Tangshan 063000, Hebei,China)
Abstract:Based on the 100 t converter in a steel plant in the north, a three-dimensional mathematical model of the flow field in the top-blown converter was established using Fluent software to study the dependence of oxygen jets with different high Mach numbers and the velocity distribution of the molten steel in the molten pool. The study found that the high Mach number oxygen lance has a stable curve at Ma=2.0~2.3, at which the pressure of the supplied oxygen is most optimal. With the rising of the oxygen supply pressure, the maximum velocity of the oxygen jet, the impact diameter and the impact depth of the molten steel surface also increase. The simulation results show that the oxygen jet has the weakest mutual interference between jets under the designed operating oxygen pressure of 1.0 MPa. The oxygen jet has a smaller increase in the impact diameter and the impact depth after the design oxygen pressure is greater than 1.0 MPa. Based on the above research, after the application of the high Mach number oxygen lance in the actual production, combined with the variable gun position and the variable pressure, the molten steel flow at the bottom of the molten pool can be improved, and the converter blowing process can be stabilized, and the slag splash can be controlled.
Keywords:oxygen lance   high Mach number   numerical simulation   oxygen supply pressure   velocity flow field  
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