Jet Characteristics of a High-Mach-Number Oxygen-Lance Nozzle Under High Oxygen Pressure

被引：8
|
作者：
Zhang, Yanchao [1 ]
Zhang, Caijun [1 ]
Han, Yang [1 ]
Wang, Bo [1 ]
Zhu, Liguang [2 ]
Zhang, Qingjun [1 ]
机构：
[1] North China Univ Sci & Technol, Coll Met & Energy, Hebei High Qual Steel Continuous Casting Engn Tec, Tangshan 063000, Peoples R China
[2] Hebei Univ Sci & Technol, Hebei High Qual Steel Continuous Casting Technol, Shijiazhuang 050018, Hebei, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2021年 / 52卷 / 06期
基金：
中国国家自然科学基金;
关键词：
HOT METAL DEPHOSPHORIZATION; COMPREHENSIVE MODEL; SIMULATION; BATH; DECARBURIZATION; SURFACE;
D O I：
10.1007/s11663-021-02325-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In response to some problems that occurred when a steel mill in China transitioned to automatic steelmaking, a high-Mach-number oxygen lance was designed and forged. The designed oxygen pressure was 1.01 MPa; at this high oxygen pressure, the Mach number of the nozzle outlet could reach 2.15. A three-dimensional two-phase flow model was established by numerical simulation, and the jet characteristics of the high-Mach-number oxygen-lance nozzle at different oxygen-supply pressures and the impact of the jet on the melting pool were analyzed and studied. The jet was found to be most stable in the oxygen-supply-pressure range 0.9 to 1.01 MPa. Considering the impact depth, impact area, velocity distribution in the molten pool, and mixing time, a combined top- and bottom-blowing process could optimize the mixing effect of the nozzle on the molten pool. Application of the nozzle in industrial practice greatly improved the stability, quality, and efficiency of smelting and lengthened the life of the oxygen-lance nozzle by 100 furnaces.
引用
收藏
页码：4070 / 4081
页数：12
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