Dissolution behavior of alumina in mold fluxes for steel continuous casting

Bui, Anh-Hoa; Ha, Hyun-Mo; Kang, Youn‐Bae; Chung, In-Sang; Lee, Hae-Geon

doi:10.1007/bf03027440

Cited by 21 publications

(17 citation statements)

References 13 publications

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“…In the present work, the effect of Na 2 by many researchers using rotating finger method. [4][5][6][7][8][9] It was found that diffusion in boundary layer was rate controlling and the dissolution rate increased with increasing rotating speed and temperature. Confocal scanning laser microscopy (CSLM) was employed to investigate the dissolution of Al 2 O 3 particle in molten slag under natural convection [11][12][13] and it was reported that Al 2 O 3 dissolution process in CaOAl 2 O 3 -SiO 2 and CaO-Al 2 O 3 -MgO-SiO 2 is controlled by boundary layer diffusion inside the slag phase.…”

Section: Effect Of Na 2 O On Dissolution Rate Of Alumina In Cao-al 2 mentioning

confidence: 99%

“…Considering the possible presence of the Taylor's vortex, decrease in radius data in where b represents a constant and U represent the periphery velocity U (cm/s) which could be calculated as U = πdm/60, where d represents the mean diameter of cylinder in mm and m represents number of revolutions per min); Exponent s has been reported [4][5][6] in the range of 0.50 to 0.80. The relationship between lnV and lnU was shown in Fig.…”

Section: Effect Of Rotation Speed On Dissolution Rate Ofmentioning

confidence: 99%

“…[4][5][6][7][8][9][10][11][12][13][14] The dissolution of Al 2 O 3 rod in CaO-Al 2 O 3 -SiO 2 -based slag under forced convection has been studied…”

Section: Introductionmentioning

confidence: 99%

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Effect of Na2O on Dissolution Rate of Alumina in CaO–Al2O3–MgO–SiO2 Slag

Shu

Wang

et al. 2015

ISIJ International

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Section: Effect Of Na 2 O On Dissolution Rate Of Alumina In Cao-al 2 mentioning

confidence: 99%

Section: Effect Of Rotation Speed On Dissolution Rate Ofmentioning

confidence: 99%

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Effect of Na2O on Dissolution Rate of Alumina in CaO–Al2O3–MgO–SiO2 Slag

Shu

Wang

et al. 2015

ISIJ International

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“…Using flux density calculated by the Turkdogan method, 14) flux viscosity calculated by the Riboud model 3,14) for its simplicity, and alumina diffusivity in molten fluxes A21-A24 calculated from the Eq. (6), dependence of flux viscosity and alumina diffusivity on flux composition is shown in Fig.…”

Section: Concentration Driving Force For Alumina Dissolutionmentioning

confidence: 99%

“…1,2) Dissolution of oxides including alumina in molten slag/flux has been studied by several researchers. [3][4][5][6][7][8][9][10][11] It was reported that the dissolution rate of alumina is influenced by many factors, e.g. viscosity of liquid slag, 7) temperature, 11) convection flow 4) and so on.…”

Section: Introductionmentioning

confidence: 99%

Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting

Bui

Chung

et al. 2005

ISIJ Int.

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Dissolution kinetics of alumina into mold fluxes for the continuous steel casting was investigated by employing the rotating cylinder method. The dissolution rate of Al 2 O 3 was determined by measuring weight loss of Al 2 O 3 rod, initial dipping area and immersion time. It is concluded that the alumina dissolution is controlled not only by the mass transfer in the molten flux but also by the formation of intermediate compounds such as CaO · 6Al 2 O 3 , CaO · 2Al 2 O 3 , and 2CaO · Al 2 O 3 · SiO 2 on the rod/flux interface. Concentration driving force, rod rotation speed, temperature of molten flux and chemical composition are also important factors which affect the alumina dissolution. The dissolution rate increased with addition of MgO or CaF 2 , or up to 5%mass of Na 2 O, and then decreased with further increase in the amount of Na 2 O content. The physical erosion of the rod surface by the solid 2CaO · SiO 2 dispersed in the liquid was attributed to fast alumina dissolution.

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Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Wang

et al. 2019

steel research int.

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The nonmetallic inclusions absorbed by ladle slags during secondary steelmaking operations and in the tundish and mold during casting are crucial to the production of interstitial-free (IF) steel. However, little to no research has been conducted on the separation and dissolution of inclusions along with a focus on IF steel. Herein, a theoretical study of the separation of solid alumina at the steel-slag interface is conducted. The dissolution of alumina particles is observed in situ in different IF steel slags, and the dissolution mechanism is analyzed. The results show that the interfacial tensions and slag viscosity have a large influence on the predicted displacement, but for IF steel production, the dissolution of inclusions in the slags has a greater influence on the removal of inclusions than on inclusion separation. Using ladle slags with a proper CaO wt%/Al 2 O 3 wt% is the most effective way to remove the Al 2 O 3 inclusions compared with the other slags in IF steel production.

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Dissolution behavior of alumina in mold fluxes for steel continuous casting

Cited by 21 publications

References 13 publications

Effect of Na<sub>2</sub>O on Dissolution Rate of Alumina in CaO–Al<sub>2</sub>O<sub>3</sub>–MgO–SiO<sub>2</sub> Slag

Effect of Na<sub>2</sub>O on Dissolution Rate of Alumina in CaO–Al<sub>2</sub>O<sub>3</sub>–MgO–SiO<sub>2</sub> Slag

Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

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