Direct and Indirect Dissolution of Sapphire in Calcia–Magnesia–Alumina–Silica Melts: Dissolution Kinetics

Sandhage, Kenneth H.; Yurek, G. J.

doi:10.1111/j.1151-2916.1990.tb04269.x

Cited by 69 publications

(67 citation statements)

References 25 publications

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“…With this assumption, Sandhage et al 5) and Yu et al 7) concluded that mass transfer coefficient is suited to be expressed by the ) is expressed as follows:…”

Section: Rotation Speed In Alumina Dissolutionmentioning

confidence: 99%

“…Considering the reported findings, [4][5][6][7] diffusion in the boundary layer was assumed as the rate-limiting step in the present study. With this assumption, Sandhage et al 5) and Yu et al 7) concluded that mass transfer coefficient is suited to be expressed by the ) is expressed as follows:…”

Section: Rotation Speed In Alumina Dissolutionmentioning

confidence: 99%

“…The formation of intermediate compounds on the interface of the Al 2 O 3 rods, their morphology and thickness was found to affect the dissolution process. 5) The mass transfer of alumina in liquid slags was found to be the rate-limiting step of the dissolution process. 4,6,7,11) The present study aims to examine dissolution kinetics of alumina into a mold flux for the continuous steel casting by employing the rotating cylinder method.…”

Section: Introductionmentioning

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%

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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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“…With this assumption, Sandhage et al 5) and Yu et al 7) concluded that mass transfer coefficient is suited to be expressed by the ) is expressed as follows:…”

Section: Rotation Speed In Alumina Dissolutionmentioning

confidence: 99%

Section: Rotation Speed In Alumina Dissolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting

Bui

Chung

et al. 2005

ISIJ Int.

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“…THE rotating disk/cylinder (rod) method has been widely applied to study the dissolution of solids in liquids for decades, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] in particular for high-temperature systems such as dissolution of solid metals into liquid metals, and dissolution of ceramic solids into liquid oxides (slags). While valuable information have been gained by these studies, some misconceptions in using this method need to be addressed and analyzed.…”

Section: Introductionmentioning

confidence: 99%

A New Experimental Design to Study the Kinetics of Solid Dissolution into Liquids at Elevated Temperature

Wang

White

Sichen

2018

Metall Mater Trans B

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A new method was developed to study the dissolution of a solid cylinder in a liquid under forced convection at elevated temperature. In the new design, a rotating cylinder was placed concentrically in a crucible fabricated by boring four holes into a blank material for creating an internal volume with a quatrefoil profile. A strong flow in the radial direction in the liquid was created, which was evidently shown by computational fluid dynamic (CFD) calculations and experiments at both room temperature and elevated temperature. The new setup was able to freeze the sample as it was at experimental temperature, particularly the interface between the solid and the liquid. This freezing was necessary to obtain reliable information for understanding the reaction mechanism. This was exemplified by the study of dissolution of a refractory in liquid slag. The absence of flow in the radial direction in the traditional setup using a symmetrical cylinder was also discussed. The differences in the findings by past investigators using the symmetrical cylinder are most likely due to the extent of misalignment of the cylinder in the containment vessel.

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Dissolution of alumina in stainless steelmaking slags

Mantha

Görnerup²,

Lahiri

2001

Steel Research

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Dissolution of alumina in stainless steelmaking slags was studied by conducting laboratory scale experiments on typical slags in the temperature range 1823–1923 K. The mechanism of dissolution was studied under the actual steelmaking conditions where several phenomena such as simultaneous reduction of chromium, iron and vanadium oxides by carbon, in‐situ gas generated due to the reduction, foam/emulsion formation occur. The kinetics of alumina dissolution are studied under the influence of the above mentioned phenomena.

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Direct and Indirect Dissolution of Sapphire in Calcia–Magnesia–Alumina–Silica Melts: Dissolution Kinetics

Cited by 69 publications

References 25 publications

Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting

Dissolution Kinetics of Alumina into Mold Fluxes for Continuous Steel Casting

A New Experimental Design to Study the Kinetics of Solid Dissolution into Liquids at Elevated Temperature

Dissolution of alumina in stainless steelmaking slags

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