Investigation on the Fluid Flow and Decarburization Process in the RH Process

Ling, Haitao; Zhang, Lifeng

doi:10.1007/s11663-018-1319-3

Cited by 29 publications

(34 citation statements)

References 32 publications

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“…To describe the bubble expansion due to density changes, the density (ρ b,t ) and diameter (d b,t ) of rising bubble are calculated at each time step according to the ideal gas law: 18,20,25) U Table 2. Governing equations for the coupled VOF-DPM model.…”

Section: Bubble Size Modelmentioning

confidence: 99%

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Numerical Simulation of Multiphase Flow and Mixing Behavior in an Industrial Single Snorkel Refining Furnace: Effect of Bubble Expansion and Snorkel Immersion Depth

Dai

Cheng

et al. 2019

ISIJ Int.

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A coupled mathematical model is used to simulate the multiphase flow in an industrial Single Snorkel Refining Furnace (SSRF). Based on the present model, the evolution characteristics of bubble size, density, and velocity are analysed during the long-distance rising process. The comparative studies indicate that the expansion of bubbles has an enormous impact on the circulation rate and free surface in the vacuum chamber. Furthermore, the effect of snorkel immersion depth (SID) on the circulation rate, mixing time, and fluid flow are investigated. The results indicate that the circulation rate decreases with the increase of SID, while the mixing time shows an uptrend with the increase of SID. Particularly, when the SID exceeds 0.4 m, the scope of dead zone around the snorkel dramatically increases, which further decreases the flow velocity of slag layer in the ladle.

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Section: Bubble Size Modelmentioning

confidence: 99%

“…The PISO scheme was used for the pressure-velocity coupling. 25) The time step was 0.001 second. After initialization, the transient simulation was run until a quasi-steady state was reached, then the species equation was activated until the tracer content was reached a 95% level of homogeneity.…”

Section: Computational Proceduresmentioning

confidence: 99%

Numerical Simulation of Multiphase Flow and Mixing Behavior in an Industrial Single Snorkel Refining Furnace: Effect of Bubble Expansion and Snorkel Immersion Depth

Dai

Cheng

et al. 2019

ISIJ Int.

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“…Much research has been conducted to understand the decarburization in the RH process. Some researchers [11][12][13][14][15] have established the model for prediction of decarburization reaction during the RH refining process. Liu [16] investigated the decarburization behaviors of ultra-low-carbon steel.…”

Section: Introductionmentioning

confidence: 99%

The Research of Low-Oxygen Control and Oxygen Behavior during RH Process in Silicon-Deoxidization Bearing Steel

Xiao

Wang

Bao

2019

Metals

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The variation of total oxygen (T.O) content, characterization of inclusions, slag composition, and off-gas behavior during the smelting process of silicon-deoxidization bearing steel were investigated with industrial experiments. The change of content of combined oxygen during RH (Ruhrstahl–Hereaeus vacuum degassing furnace) process was calculated and compared with T.O content change. It is found that the decrease of oxygen content is mainly caused by the removal of dissolved oxygen rather than the removal of oxides during RH process. Carbon was found to be a strong deoxidizer (stronger than aluminum) in high vacuum degree. Top slag is an oxygen source of the deoxidization process, leading to the re-oxidization of liquid steel, even though the FeO content is low in top slag. During the RH process, the change of oxygen mainly exists in three processes: 1) Deoxidization reaction in vacuum chamber, 2) oxygen mass transfer process between liquid steel out from a vacuum chamber and in ladle, and 3) oxygen mass transfer between ladle slag and liquid steel. It depends mainly on the mass transfer of the oxygen in the liquid steel.

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“…e removal of inclusions and the control of small inclusions are important factors that directly affect the quality of steel. RH refining in steelmaking process has prominent technical advantages for smelting clean steel [4]. It is conducive to the removal of inclusions and the improvement of steel quality.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Investigation on Inclusion‐Argon‐Liquid Steel Phenomenon in RH Refining of High‐Manganese and High‐Aluminum Steel

Chen

Liu

Han

et al. 2019

Mathematical Problems in Engineering

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Investigation on the Fluid Flow and Decarburization Process in the RH Process

Cited by 29 publications

References 32 publications

Numerical Simulation of Multiphase Flow and Mixing Behavior in an Industrial Single Snorkel Refining Furnace: Effect of Bubble Expansion and Snorkel Immersion Depth

Numerical Simulation of Multiphase Flow and Mixing Behavior in an Industrial Single Snorkel Refining Furnace: Effect of Bubble Expansion and Snorkel Immersion Depth

The Research of Low-Oxygen Control and Oxygen Behavior during RH Process in Silicon-Deoxidization Bearing Steel

Numerical Simulation and Experimental Investigation on Inclusion‐Argon‐Liquid Steel Phenomenon in RH Refining of High‐Manganese and High‐Aluminum Steel

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