Kinetic Model of Steel Refining in a Ladle Furnace

Conejo, Alberto N.; Lara, Franjola; Macías-Hernández, Manuel J.; Morales, R. D.

doi:10.1002/srin.200705871

Cited by 38 publications

(29 citation statements)

References 8 publications

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“…Fe O FeO > @ .......................... ( where K FeO is the equilibrium constant for reaction (R8) at 1 823 K. 18) The calculated saturation oxygen content, which is in equilibrium with iron, is around 0.18 wt% when the (FeO) activity value of 1 was used. As shown in Figs.…”

Section: Concluding Discussionmentioning

confidence: 99%

A Kinetic Model on Oxygen Transfer at a Steel/Slag Interface under Effect of Interfacial Tension

Tanaka

Suzuki

et al. 2018

ISIJ Int.

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A kinetic model was developed to predict the dynamic change of the oxygen content in the sub-interface region as well as the dynamic change of the interfacial tension between molten steel and slag. The dynamic steel/slag interfacial phenomena are very complex, where the combined effect of thermodynamics and kinetics on the interfacial tension needs to be accounted for. As a first step, the current model only considers the SiO 2 decomposition, oxygen adsorption and desorption at the steel/slag interface to realize the modeling of the dynamic change of the steel/slag interface phenomena. The oxygen desorption rate was derived based on the slope of the interfacial tension change over oxygen content. Specifically, the oxygen change with time in a sub-interface was predicted by the current model. The oxygen desorption rate was found to have an important influence on the dynamic change of the oxygen content in the sub-interface region. Furthermore, a low slag viscosity was found to increase the oxygen content at the interface due to the fast supply of SiO 2 from the slag bulk to the interface. In addition, the equilibrium constant for the oxygen adsorption at an interface due to the interfacial tension effect increases the oxygen content in the sub-interface region.

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Section: Concluding Discussionmentioning

confidence: 99%

A Kinetic Model on Oxygen Transfer at a Steel/Slag Interface under Effect of Interfacial Tension

Tanaka

Suzuki

et al. 2018

ISIJ Int.

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“…[Al] activity coefficient 17) f f 5. The reason can be explained by the proposed mechanism in part 2.4.…”

Section: Comparison Of Model Predictions To Experimental Datamentioning

confidence: 99%

A Kinetic Model of Mass Transfer and Chemical Reactions at a Steel/Slag Interface under Effect of Interfacial Tensions

Tanaka

Suzuki

et al. 2019

ISIJ Int.

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“…Equations (9) and (10) are the equations to calculate the concentration changes of each component with time in the molten steel and slag, separately. According to previous studies [5,12,16,20], the mass transfer coefficient in the molten steel could be influenced by the stirring energy dissipation rate. The expression of the stirring energy dissipation rate obtained by mathematical simulation is given in equation (11).…”

Section: And Equation (4)mentioning

confidence: 99%

“…However, the real chemical reactions can hardly reach the equilibrium state during the practical process. In recent years, many researchers have established kinetic models to study the compositional changes during refining process [1][2][3][4][5][6][7][8][9][10][11][12][13]. The details of these models are listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study on compositional variations of inclusions, steel and slag during refining process

Zhang

Ren

Zhang

2018

Metall. Res. Technol.

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A steel-slag-inclusion-alloy-refractory-air multiphase model, which combined the kinetic analysis and the consideration of fluid flow in argon-stirred ladle, was established to investigate the compositional changes during refining process. The steel-slag reaction, the steel and inclusion reaction, the refractory-steel reaction, the refractory dissolution into the slag, the reoxidation of the molten steel, the removal of inclusions by floating, and the alloy dissolution were all considered in the current model. The stirring energy, the average speed of the molten steel in the plume, the horizontal speed of the molten steel in the open eye, the speed of the molten steel near the side wall, the speed of the molten steel at the bottom of the ladle and the volume fraction of the plume were obtained by mathematical simulation. The mass transfer coefficient of the molten steel is obtained by mathematical simulation. Meanwhile, it is assumed that the mass transfer coefficient of inclusions is influenced by the temperature. The calculation results are in accordance with the experimental ones. The influence of different slag compositions, different gas flow rates, and different inclusion diameters on system compositions were also investigated using the current model. It is indicated that the content of T.O. in the molten steel was influenced by the gas flow rate and the removal rate of inclusions goes up with the increasing inclusion diameter.

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Kinetic Model of Steel Refining in a Ladle Furnace

Cited by 38 publications

References 8 publications

A Kinetic Model on Oxygen Transfer at a Steel/Slag Interface under Effect of Interfacial Tension

A Kinetic Model on Oxygen Transfer at a Steel/Slag Interface under Effect of Interfacial Tension

A Kinetic Model of Mass Transfer and Chemical Reactions at a Steel/Slag Interface under Effect of Interfacial Tensions

Kinetic study on compositional variations of inclusions, steel and slag during refining process

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