Effect of Slag Composition on Wettability of Oxide Inclusions

Monaghan, Brian J; Abdeyazdan, Hamed; Dogan, Neslihan; Rhamdhani, M. Akbar; Longbottom, Raymond J.; Chapman, Michael W.

doi:10.2355/isijinternational.isijint-2015-168

Cited by 24 publications

(13 citation statements)

References 6 publications

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“…Previous work [44][45][46] showed that alumina has a high-wetting behavior (ϴ < 90°) with molten slag. Previous work [44][45][46] showed that alumina has a high-wetting behavior (ϴ < 90°) with molten slag.…”

Section: Interfacial Energymentioning

confidence: 99%

A phase‐field model for the study of isothermal dissolution behavior of alumina particles into molten silicates

Xuan¹,

2019

J Am Ceram Soc

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Particle dissolution process refers to the dissolving of one liquid or solid phase into another solvent phase. This process is of vital importance in the engineering material science, and chemical engineering, etc. Here, we develop a phase‐field model with diffusion‐controlled processes at interfaces for isothermal dissolution of alumina inclusion particles in molten silicates, referred as “slag,” with comprehensive compositions applied in process metallurgy. The interfacial energy between solid inclusion particle and molten silicate can vary with different temperatures and chemical compositions. This model is validated using experimental data of high‐temperature confocal laser scanning microscopy (HT‐CLSM) technique. Moreover, the developed model is applicable to predict the dissolution behavior of solid particle in a realistic size scale. The possibility of the model application is illustrated with studies of different physical parameters that affect particle dissolution behavior. The phase‐field simulations show that inclusion morphology influences both the dissolution profile and time, and the influence decreases with the increased temperature. Increasing same amount of Al2O3 component in slag, the increased degrees of the alumina dissolution time in silicates with different V‐ratio values, a ratio between the mass percent of CaO and that of SiO2, are almost the same. If the V‐ratio of slag is relatively small, an increased MgO component in the silicate will significantly decrease the particle dissolution time. On the contrary, the change in MgO component in the silicate will have a minor effect if the value of V‐ratio is quite large. In order to rapidly dissolve the inclusion, basicity index (BI) of molten silicate should be larger than 1.4. A balance between BI and MgO component in slag is suggested to be considered to design or optimize molten silicate (slag) for its application in the refining process of steel manufacturing.

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Section: Interfacial Energymentioning

confidence: 99%

A phase‐field model for the study of isothermal dissolution behavior of alumina particles into molten silicates

Xuan¹,

2019

J Am Ceram Soc

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“…According to the work done by Monaghan [14] et al and Choi [15] et al, the effect of slag basicity on the contact angle might be quite different for different slag compositions. In the current study, the contact angle between slag with lower basicity and substrate was smaller, which was in consistent with Choi's result.…”

Section: Contact Angle Between Molten Slag and Dolomitic Substratementioning

confidence: 99%

“…Monaghan et al [14] investigated the dynamic wetting of slags with different compositions on solid oxides representing inclusion phases (Al2O3, MgAl2O4 and CaO·Al2O3), and concluded that for basic type ladle slags the plateau contact angle was independent of slag composition and for acid type slags the plateau contact angle decreased with increasing basicity. Choi and Lee [15] conducted a number of experiments with different slag compositions and the results showed that the effect of slag basicity on the wettability depended on the slag composition.…”

Section: Introductionmentioning

confidence: 99%

Wettability between molten slag and dolomitic refractory

Shen

Zhang

Wang

et al. 2016

Ceramics International

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In the current study, the wettability between molten slag and dolomitic refractory materials used in the ladle during steel refining was investigated. The contact angle between molten slag and dolomitic substrate decreased with increasing temperature. The slag with lower basicity spread on the substrate more easily and penetrated deeper into the substrate. The penetration depth of slag into the refractory increased with the extension of holding time. The CaO in the refractory dissolved into slag which was then saturated with CaO. The reaction between slag and substrate resulted in the formation of solid Ca3SiO5, which slowed down the further penetration of slag into the refractory.

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“…The non-metallic inclusions present in metal are of different origins, e.g. from deoxidation, refractory materials, slag entrainment, casting powders and entrainment of the clogged parts of the submerged entry nozzle into the metal volume [11][12][13][14][15][16]. According to professional literature, during the continuous casting of steel on the casting equipment, casting with stable speeds is preferred.…”

Section: Introductionmentioning

confidence: 99%

“…A negative impact on the non-metallic inclusions to steel purity depends on their concentrations, content, types and shapes. It is recommended to avoid big and angular non-metallic inclusions [14][15][16]. The impact of the non-metallic inclusions on commercial properties of steel materials is partially caused by the refinery process and steel casting.…”

Section: Introductionmentioning

confidence: 99%

Impact of Interstitial Aluminium Content on Occurrence of Non-Metallic Inclusions in Steel

Rega¹,

Molnár²,

Šolc³

et al. 2016

Acta Metall Slovaca

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This paper details the study of interstitial aluminium impact on non-metallic inclusion occurrence on the basis of individual samples examination taken during steel production and processing. The aim was to identify and describe the relation between the content of interstitial aluminium in metal volume and the concentration of non-metallic inclusions on Al x O y basis occurring in steel. The identification of the non-metallic inclusions occurring in liquid steel was within this study implemented by the (AES) method based on the atom emission spectrometry evaluating the presence of the respective elements in the metal volume. This method works on a principle of emitted light from the existing source with a high voltage spark. The results of this study indicate a correlation between the interstitial aluminium content and concentrations of non-metallic inclusions on the Al x O y basis.Keywords: steel cleanliness, secondary metallurgy, continuous casting, inclusions in steel 1 Introduction It is necessary to ensure and maintain a high purity of produced steel especially for those types designed for a specific application. Regulation of the non-metallic inclusion content, amount and distribution has an essential impact on the steel purity [1]. Development of packaging materials significantly relates to thin electrolytically tinned sheets, which are nearly irreplaceable in some branches of the packaging sector. They are mainly used in the food industry [2-5] thanks to their slim thickness, wide range of mechanical properties, high corrosion resistance and of course their harmlessness to health. The ability to regulate, respectively to control the concentration, morphology and composition of the non-metallic inclusions [6,7] represents one of the most important factors to the improvement of steel purity, respectively the quality improvement of steel products. It is important to study the increased concentration distribution of the nonmetallic inclusions due to its impact on steel product quality in the form of the resulting defects [8,9]. The priority is to decrease the number of defects inside the steel ingot that results from the non-metallic inclusions present in steel [10]. The non-metallic inclusions present in metal are of different origins, e.g. from deoxidation, refractory materials, slag entrainment, casting powders and entrainment of the clogged parts of the submerged entry nozzle into the metal volume [11][12][13][14][15][16]. According to professional literature, during the continuous casting of steel on the casting equipment, casting with stable speeds is preferred. Generally, changes of speed in the casting process in production are inevitable [17]. A negative impact on the non-metallic inclusions to

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Effect of Slag Composition on Wettability of Oxide Inclusions

Cited by 24 publications

References 6 publications

A phase‐field model for the study of isothermal dissolution behavior of alumina particles into molten silicates

A phase‐field model for the study of isothermal dissolution behavior of alumina particles into molten silicates

Wettability between molten slag and dolomitic refractory

Impact of Interstitial Aluminium Content on Occurrence of Non-Metallic Inclusions in Steel

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