Oxidation kinetics of iron alloy drops in oxidizing slags

Gaye, Henri; Riboud, Paul Victor

doi:10.1007/bf02696927

Cited by 45 publications

(36 citation statements)

References 3 publications

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“…This is in agreement with metallurgical data (e.g., Gaye and Riboud, 1977), that have shown that the kinetics of oxidation of iron alloy drops in slags are of the order of 0.007 to 0.035 g/s.…”

Section: Kinetic Considerationssupporting

confidence: 92%

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Villeneuve

Libourel

Soulié

2015

Geochimica et Cosmochimica Acta

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Please cite this article as: Villeneuve, J., Libourel, G., Soulié, C., Relationships between type I and type II chondrules: Implications on chondrule formation processes, Geochimica et Cosmochimica Acta (2015), doi: http://dx.doi.org/ 10.1016/j.gca. 2015.03.033 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Kinetic Considerationssupporting

confidence: 92%

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Villeneuve

Libourel

Soulié

2015

Geochimica et Cosmochimica Acta

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“…Several researchers have studied aspects of droplet behavior relevant to steelmaking including, decarburization, [1][2][3][4][5][6] droplet generation, [7][8][9][10][11][12][13][14][15][16] size distribution, [17,18] and residence time. [19] Other workers have developed models [20][21][22][23] and conducted plant trials, [24][25][26][27][28] which considered the role of droplets in the overall process kinetics.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Sulfur on Dephosphorization Kinetics Between Bloated Metal Droplets and Slag Containing FeO

Dogan

Coley

2017

Metall Mater Trans B

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The bloating behavior of metal droplets and the dephosphorization behavior of bloated droplets at 1853 K (1580°C) were investigated using X-ray fluoroscopy coupled with constant volume pressure change measurements and chemical analysis of quenched samples. The effect of sulfur content on dephosphorization kinetics was studied during the decarburization period. The slag foamed during the reaction forming a foamy layer over a dense layer. After a short incubation period, the droplets became bloated due to internal decarburization. The bloated droplets floated from the dense slag into the foamy slag. The behavioral changes are directly related to the effect of sulfur on the incubation time for swelling. The dephosphorization reaction was very fast; droplets with low sulfur contents experienced phosphorus reversion shortly after entering the foamy slag, while those with higher sulfur content took a longer time to swell and went through reversion before they entered the foam. The dephosphorization rate and maximum phosphorus partition were higher at lower CO evolution rates because the dynamic interfacial oxygen potential increased with the decreasing oxygen consumption rate. The rate controlling step for dephosphorization was initially a combination of mass transport in both the metal and the slag. As the iron oxide in the slag was depleted, the rate control shifted to mass transport in slag.

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“…[11][12][13][14] It is however known that under dynamic conditions the interface between phases can display significant perturbation in comparison to a relaxed planar state, and may even lead to emulsification. [15][16][17][18][19][20] A proper description of the slag/metal reaction necessitates an elucidation of the dynamic change of interfacial area and the coupling of this change to the interfacial reactions. As such this work intends to investigate the effects of refining performance on interface morphology between Fe alloys and slags where mixing of phases may intrinsically occur to reduce the kinetic restrictions of mass transfer.…”

Section: Introductionmentioning

confidence: 99%

“…X-ray fluoroscopy and direct observation of in situ droplets has also given evidence to the change in droplet shape during Fe alloy/slag interactions. [16,[33][34][35] It has been proposed by these studies that the initial driving force is integral when evaluating the change in droplet morphology as the interfacial tension between the two mediums decreases rapidly allowing for interfacial area increase.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Cause of Spontaneous Emulsification of a Free Steel Droplet; Validation of the Chemical Exchange Pathway

Spooner

Assis

Warnett

et al. 2016

Metall Mater Trans B

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Small Fe-based droplets have been heated to a molten phase suspended within a slag medium to replicate a partial environment within the basic oxygen furnace (BOF). The confocal scanning laser microscope (CSLM) has been used as a heating platform to interrogate the effect of impurities and their transfer across the metal/slag interface, on the emulsification of the droplet into the slag medium. The samples were then examined through X-ray computer tomography (XCT) giving the mapping of emulsion dispersion in 3D space, calculating the changing of interfacial area between the two materials, and changes of material volume due to material transfer between metal and slag. Null experiments to rule out thermal gradients being the cause of emulsification have been conducted as well as replication of the previously reported study by Assis et al. [1] which has given insights into the mechanism of emulsification. Finally chemical analysis was conducted to discover the transfer of oxygen to be the cause of emulsification, leading to a new study of a system with undergoing oxygen equilibration.

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Oxidation kinetics of iron alloy drops in oxidizing slags

Cited by 45 publications

References 3 publications

Relationships between type I and type II chondrules: Implications on chondrule formation processes

Relationships between type I and type II chondrules: Implications on chondrule formation processes

The Influence of Sulfur on Dephosphorization Kinetics Between Bloated Metal Droplets and Slag Containing FeO

Investigation into the Cause of Spontaneous Emulsification of a Free Steel Droplet; Validation of the Chemical Exchange Pathway

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