Numerical Study on Gas-Metal-Slag Interaction with Single-Flow Postcombustion Oxygen Lance in the Steelmaking Process of a Top-Blown Converter

Dong, Peng-yuan; Zheng, Siyu; Zhu, Miaoyong

doi:10.1007/s11837-021-05147-2

Cited by 15 publications

(11 citation statements)

References 31 publications

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“…Other studies have conducted extensive work on the phenomenon and quantitatively normalised cavity depth, but most studies focused on single or multiple jets. 8,13,17 Studies on the prediction of cavity depth by a swirling jet have not been reported, and thus this study, which provides an in-depth discussion of this topic, fills a needed area of information.…”

Section: An Improved Cavity Depth Modelmentioning

confidence: 99%

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Effect of cavity shape caused by jet impact of swirl-type oxygen lance on molten bath mixing efficiency

Wang,

Liu,

Liu

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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In top-blowing steelmaking, the shape and size of the cavity formed by a supersonic jet have impacts on the molten bath, which is crucial for the refining process. This study used physical experiments to explore the influences that the operation and structural parameters of swirl-type oxygen lance have on cavity shape and mixing time. The results demonstrate that the lance height has a greater influence on cavity shape than flow rate, and the influence that the inclination angle has on cavity shape is greater than that of the swirl angle. Compared to the traditional oxygen lance, the mixing efficiency of the swirl-type oxygen lance increased by 5%–13.3%. When the cavity shape index of the swirl-type oxygen lance for the 260 t converter is in the range of 0.46–0.5, the mixing effect of the molten bath is the best. Additionally, an improved cavity depth prediction model of the swirl-type oxygen lance was proposed using the previous studies.

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Section: An Improved Cavity Depth Modelmentioning

confidence: 99%

“…This is because the increase in the range of jet impact improves the flow of molten steel at the furnace wall, which is the inactive zone of the molten bath in most studies. 13,17 Relationship between cavity shape and mixing time…”

Section: Mixing Timementioning

confidence: 99%

Effect of cavity shape caused by jet impact of swirl-type oxygen lance on molten bath mixing efficiency

Wang,

Liu,

Liu

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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“…Compared with converter steelmaking, high-quality steel production is always a key issue and challenge in EAF steelmaking because it is very difficult to produce molten steel with low phosphorous content, low nitrogen content and low oxygen content in an EAF [7][8][9]. In EAF steelmaking, the weakened molten bath reaction kinetics conditions make it hard to remove the phosphorus from the molten steel [10].…”

Section: Introductionmentioning

confidence: 99%

Fundamental Study on Electric Arc Furnace Steelmaking with Submerged Carbon Powder Injection with CO2-O2 Mixed Gas

Li,

Wei,

Han

2023

Metals

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The technology of submerged carbon powder injection with CO2 and O2 mixed gas (SCPI-COMG) is a new type of powder injection technology. It can increase the molten bath carbon content and improve the molten steel quality by injecting carbon powder directly into the molten steel with CO2 and O2 mixed gas. To optimize the process parameters of this novel technology, the mechanism of this technology and the effect of SCPI-COMG on EAF steelmaking were investigated in this study. Based on an induction furnace experiment, the effects of molten bath carburization and fluid flow on the scrap melting were analyzed. A mathematical model of the axis of gas jets in liquid steel was built to analyze the impact behaviors of gas jets in liquid steel. Based on the results of this theoretical model, for a gas jet in liquid steel, with α ≥ 20°, the horizontal inject distance decreases with α increasing and with 0° ≤ α ≤ 20°, the horizontal inject distance increases with α increasing. Finally, based on the newly built materials and energy balance model of EAF steelmaking with SCPI-COMG, the influences of the gas-solid parameters on the EAF steelmaking technical indexes were also analyzed.is very useful for optimizing the process parameters of EAF steelmaking with SCPI-COMG. The results of this study are very useful to optimize the process parameters of EAF steelmaking with SCPI-COMG of Gas Jet in Liquid Steel.

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“…Due to the limitations of detection technologies and harsh environments, it is difficult to intuitively observe and analyze the flow-related phenomena in steelmaking converter under industrial situations. In recent decades, numerous researchers have used physical and numerical simulations to investigate the phenomena such as gas-slag-metal interaction, [3][4][5][6][7][8][9] splashing droplets, [10][11][12][13][14][15][16][17][18][19][20][21] impact cavity, [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] flow and mixing of the molten bath. Odenthal et al [3] proposed a comprehensive mathematical model to reasonably predict flow phenomena such as supersonic jet penetration and phase interface motion.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicated that a certain thickness slag layer promotes the propagation of surface waves and droplets splashing. Dong et al [ 8 ] found that the single‐flow post‐combustion lance can strengthen the gas–slag–metal interaction and reduce the slag coverage area. Lv et al [ 9 ] recognized that as the swirl angle of nozzle‐twisted lance increases from 0° to 15°, the slag coverage area and splashing droplets decrease.…”

Section: Introductionmentioning

confidence: 99%

Effect of Bottom Tuyere Arrangement Based on Impact Cavity Morphology on Kinetic Behavior of Molten Bath in Converter

Sun

Zhang

Jiang

et al. 2022

steel research int.

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The hydrodynamic interaction between the top blowing supersonic jet and the bottom plume significantly affects the kinetic behavior of the molten bath in the steelmaking converter. Herein, considering the influence of cavity morphology, four bottom tuyere arrangement cases are designed, and their effects on the gas–slag–metal interface characteristics, dynamic and mixing characteristics of molten bath, and abrasion characteristics of refractory lining are numerically studied. The results show that the gas–slag–metal interaction is more violent in the corner region of scattered cavities, with higher velocity, turbulent kinetic energy, and splashing. Arranging the tuyeres in the corner region of scattered cavities would exacerbate the nonuniformity of velocity and splashing, resulting in a large dead zone and high kinetic energy dissipation, which is not favorable to the efficient stirring and mixing of the molten bath. In contrast, arranging the tuyeres in the region of the extension line between the center of the molten bath and the center of scattered cavities may effectively enhance the relevant flow parameters. Furthermore, when the tuyeres are arranged in the corner region of scattered cavities, the bottom abrasion is more serious than that in other regions.

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Numerical Study on Gas-Metal-Slag Interaction with Single-Flow Postcombustion Oxygen Lance in the Steelmaking Process of a Top-Blown Converter

Cited by 15 publications

References 31 publications

Effect of cavity shape caused by jet impact of swirl-type oxygen lance on molten bath mixing efficiency

Effect of cavity shape caused by jet impact of swirl-type oxygen lance on molten bath mixing efficiency

Fundamental Study on Electric Arc Furnace Steelmaking with Submerged Carbon Powder Injection with CO2-O2 Mixed Gas

Effect of Bottom Tuyere Arrangement Based on Impact Cavity Morphology on Kinetic Behavior of Molten Bath in Converter

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