scholarly journals Jet characteristics of a double-structure oxygen lance and its interaction with the molten pool in BOF steelmaking

AIP Advances ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 085330 ◽  
Author(s):  
Hongbin Jia ◽  
Peng Han ◽  
Kun Liu ◽  
Yanxin Li ◽  
Kaijie Ba ◽  
...  
Keyword(s):  
Molten Pool ◽  
Oxygen Lance ◽  
Double Structure ◽  
Jet Characteristics

Effects of ambient temperature and powder gas ratio on jet characteristics of O2 + CO2 and CaO particles injected by a swirl-type oxygen lance nozzle

2021 ◽  
Author(s):  
Chao Feng ◽  
Rong Zhu ◽  
Kai Dong ◽  
Guangsheng Wei ◽  
Wenhe Wu ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Oxygen Lance ◽  
Jet Characteristics ◽  
Gas Ratio

Supersonic jet characteristics of two parameter oxygen lance nozzle

2021 ◽  
pp. 1-13
Author(s):  
Chao Feng ◽  
Tao Xia ◽  
Guangsheng Wei ◽  
Jianfeng Dong ◽  
Rong Zhu ◽  
...  
Keyword(s):  
Supersonic Jet ◽  
Oxygen Lance ◽  
Jet Characteristics ◽  
Two Parameter

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

2021 ◽  
Author(s):  
Yanchao Zhang ◽  
Caijun Zhang ◽  
Yang Han ◽  
Bo Wang ◽  
Liguang Zhu ◽  
...  
Keyword(s):  
Mach Number ◽  
Oxygen Pressure ◽  
High Oxygen ◽  
Oxygen Lance ◽  
High Mach Number ◽  
High Oxygen Pressure ◽  
High Mach ◽  
Jet Characteristics

scholarly journals Jet characteristics of CO2–O2 mixed injection using a dual-parameter oxygen lance nozzle for different smelting periods

2021 ◽  
Vol 40 (1) ◽  
pp. 345-360
Author(s):  
Chao Feng ◽  
Rong Zhu ◽  
Guangsheng Wei ◽  
Jianfeng Dong ◽  
Kai Dong
Keyword(s):  
Ambient Temperature ◽  
Simulation Software ◽  
Fluid Simulation ◽  
Smelting Process ◽  
Gas Composition ◽  
Oxygen Lance ◽  
Ansys Fluent ◽  
Impact Area ◽  
Jet Characteristics ◽  
The Impact

Abstract The jet performance of an oxygen lance nozzle influences the smelting rhythm, smelting index, and energy consumption of a converter. Due to the complexity of the process of converter smelting, the changing temperature and gas composition in the converter significantly impact the jet characteristics of the oxygen lance nozzle in the smelting process; however, research on the change law of jet characteristics in different smelting periods is limited. In this study, we used Ansys Fluent 17.0, which is commercially available fluid simulation software, to simulate the variation of jet characteristics of a mixed injection comprising 6% CO2 and 94% O2; the mixed injection was tested using a dual-parameter oxygen lance nozzle in the early, middle, and late stages of smelting. The results show that the increase of CO concentration and ambient temperature in the converter lead to a decrease in the attenuation rate of jet velocity, improved independence of multiple jets, and an increase in the impact area of jets on the molten pool. Thus, when designing and employing oxygen lance nozzles, the influence of ambient temperature and furnace gas composition on jet characteristics must be considered.

Research and Application of New Oxygen Lance for BOF Steelmaking

2011 ◽  
Vol 335-336 ◽  
pp. 74-79 ◽  
Author(s):  
Jiang Ping Rao ◽  
Guang Qiang Li ◽  
Zhi Zheng Yang
Keyword(s):  
Operation Mode ◽  
Supersonic Jet ◽  
The Other ◽  
Smelting Process ◽  
Oxygen Lance ◽  
Oxygen Equilibrium ◽  
Other Hand ◽  
Equilibrium Control ◽  
Jet Characteristics

This paper compares the structure and basic points of the new lance with traditional ones, analyses the new design with center hole in head in fields of theoretical supersonic jet characteristics including penetrating depth and stirring energy, operation mode in smelting process and. The application results show its advantages in keeping whole dephosphorizing rate, final carbon-oxygen equilibrium control of steel and cost reducing, on the other hand, point to its several drawbacks. Optimize solutions are introduced at the end.

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

2021 ◽  
Author(s):  
Chao Feng ◽  
Rong Zhu ◽  
Kai Dong ◽  
Guangsheng Wei ◽  
Baochen Han ◽  
...  
Keyword(s):  
Oxygen Lance ◽  
Jet Characteristics

scholarly journals Turbulence Calculations of a Dual-Structure Oxygen Lance for Converter Based on Hydrodynamics

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Hongbin Jia ◽  
Yanxin Li ◽  
Peng Han ◽  
Kun Liu ◽  
Haolei Han ◽  
...  
Keyword(s):  
Flow Rate ◽  
Molten Pool ◽  
Rate Ratio ◽  
Flow Characteristics ◽  
Radial Pressure ◽  
Flow Rate Ratio ◽  
Oxygen Lance ◽  
Special Equipment ◽  
Dual Structure ◽  
Jet Behavior

The oxygen lance is a piece of special equipment in the converter steelmaking process for blowing oxygen into the molten steel. After more than 80 years of development, the structure and function of the oxygen lance have undergone many changes. In this paper, based on the theory of hydrodynamics, the jet behavior characteristics of a dual-structure oxygen lance for the converter are determined and optimized by CFD simulations and compared with those of the traditional-structure oxygen lance. The research results show that multiple jets deflect to the central axis of the oxygen lance during movement and the inclination angle of the nozzle holes influences the jet deflection. A decrease in the nozzle hole angle results in an increase in the mutual suction between the streams. With the increasing flow rate through the large holes in the new dual-structure oxygen lance, the dynamic radial pressure increases at the middle of the jet. The jet flow characteristics of the new dual-structure oxygen lance are better than those of the traditional oxygen lance. Its impact on the molten pool includes greater momentum, a larger impact area, and a more uniform and powerful stirring of the molten pool. A nozzle angle of 14° combined with a flow rate ratio of 65% and a nozzle angle of 17° combined with a flow rate ratio of 35% are the optimal parameters for the new dual-structure oxygen lance.

Characteristics of droplet transfer, molten pool formation, and weld bead formation of oscillating laser hot-wire tungsten inert gas hybrid welding

2021 ◽  
Vol 33 (1) ◽  
pp. 012027
Author(s):  
Chengyuan Ma ◽  
Bo Chen ◽  
Caiwang Tan ◽  
Xiaoguo Song ◽  
Jicai Feng
Keyword(s):  
Molten Pool ◽  
Weld Bead ◽  
Inert Gas ◽  
Hybrid Welding ◽  
Hot Wire ◽  
Droplet Transfer ◽  
Bead Formation ◽  
Weld Bead Formation ◽  
Pool Formation

scholarly journals Corrigendum to Differences in microstructure and nano-hardness of selective laser melted Inconel 718 single tracks under various melting modes of molten pool’ [J Mater Res Technol 9 (2020) 10401–10410]

2021 ◽  
Vol 10 ◽  
pp. 152
Author(s):  
Hongying Wang ◽  
Liang Wang ◽  
Ran Cui ◽  
Binbin Wang ◽  
Liangshun Luo ◽  
...  
Keyword(s):  
Inconel 718 ◽  
Molten Pool
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