The Solubility of Oxygen in &amp;delta;-Iron

Kusano, Akihiko; Itô, Kiyosi; Sano, Kôkichi

doi:10.2355/tetsutohagane1955.54.5_553

Cited by 5 publications

(4 citation statements)

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“…The first imperative condition of MIDEIO is to operate above liquidus temperature of iron metal, which is 1811 K [11,12]. In the following, the selected operating temperature is 1823 K. The source of iron oxide for this process is supposed to come from naturally occurring iron ores.…”

Section: Formulation Of An Electrolyte Composition To Carry Out Mideiomentioning

confidence: 99%

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Electrolysis of iron in a molten oxide electrolyte

Wiencke

Lavelaine

Panteix³

et al. 2018

J Appl Electrochem

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Direct iron production at molten metal state from iron oxides by the sole application of electrical energy represents a possible route to decarbonize steel industry. Although chemically simple, this reaction is difficult to implement due to the problem of the multiple valence states of iron and to an operating temperature above 1811 K. Thermal, chemical, and electrical conditions have been identified based on thermodynamic considerations to carry out this reaction in a laboratory device. Experiments were undertaken to determine the contribution of the thermal level to the decomposition of iron oxide and to estimate the electronic current resulting from iron multiple valence states. The production of liquid iron was obtained resulting in recoverable samples produced at liquid state and from a faradaic process checked in real time by its accompanying anodic oxygen evolution. Graphical AbstractKeywords Molten oxide electrolysis · Metal extraction · Oxide melts · Electrochemical engineering · High-temperature processing

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Section: Formulation Of An Electrolyte Composition To Carry Out Mideiomentioning

confidence: 99%

“…(11). To ensure that metal iron production results from a faradaic phenomenon, the contribution of the thermal level to iron oxide decomposition and electronic current in the electrolyte must be evaluated.…”

Section: Experimental Planmentioning

confidence: 99%

Electrolysis of iron in a molten oxide electrolyte

Wiencke

Lavelaine

Panteix³

et al. 2018

J Appl Electrochem

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“…The diagram shows that a solid exists till the aluminum exceeds a certain critical point, and then the oxygen solubility begins to increase -then the microscopic observation on the distribution of the inclusions comprising group (II) can be satisfactorily explained. This idea is very reasonable especially in view of the experiment which was conducted by Kusano et al (13) in our laboratory and the fact that our experimental temperature was as high as that near the melting point. the solubility of oxygen is constant, but the distribution coefficient of oxygen between the solid and the liquid alloys still increases with increasing chromium content.…”

Section: Discussionmentioning

confidence: 86%

On the Distribution of Inclusions formed during the Diffusion of Aluminum into Solid Iron at High Temperature

Wanibe

Sano

1969

Trans. JIM

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The results were obtained with the naked eye and by the microscope and the microanalyzer.The results are;(1) The stratiform inclusions group was formed near the boundary between liquid aluminum and solid iron, namely at the solid-liquid interface.(2) The inclusions were much smaller than those formed during the deoxidation of liquid iron with aluminum.(3) The stratiform inclusions group consisted singly or in various combinations, of alumna, spinel hercynite and wiistite.(4) The distribution of the inclusions forming the stratiform group could be successfully explained by assuming that the behavior was the same for the solubility of oxygen in solids as in liquids.

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“…Regarding the equilibrium partition coefficients for oxygen, k0 O =0.02~0.1 have been reported. [16][17][18][19][20][21][22] In the present system, aluminium oxide will be thermodynamically formed at solidifying interface when k0 O =0.02 is applied since the oxygen concentration at solidifying interface becomes high. However the aluminium oxide was not formed in the practical operation.…”

Section: Mukai-value and The Number Of Entrapped Bubblesmentioning

confidence: 99%

Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

2013

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Surface tensions of low carbon slabs and 16 mass%Cr stainless steel were estimated using a surface thermodynamic model proposed by Mukai et al. As an application of the model, an index to evaluate the driving force for the fine bubble entrapment by the solidifying shell, the Mukai-value, M, was calculated from the surface tension values. The relationship between Mukai-value and number of entrapped bubbles was discussed. A linear relationship was found between the number of captured bubbles and Mukaivalue. In the previous work, the Mukai-value was used as a relative scale to evaluate the driving force for the movement of bubbles. However, by calculating the M from the surface tension values by the surface thermodynamic model, physically reasonable Mukai-values could be obtained.

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The Solubility of Oxygen in δ-Iron

Cited by 5 publications

References 1 publication

Electrolysis of iron in a molten oxide electrolyte

Electrolysis of iron in a molten oxide electrolyte

On the Distribution of Inclusions formed during the Diffusion of Aluminum into Solid Iron at High Temperature

Correspondence between Surface Tension Estimated by a Surface Thermodynamic Model and Number of Bubbles in the Vicinity of the Surface of Steel Products in Continuous Casting Process

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