A Structurally-based Viscosity Model of the Fully Liquid Slags in the CaO–MgO–Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;–FeO–SiO&lt;sub&gt;2&lt;/sub&gt; System

Shen, Xiang; Chen, Min; Wang, Nan

doi:10.2355/isijinternational.isijint-2019-168

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…Various researchers have tried to estimate, predict, or measure the viscosity of slag through experimental or modeling routes. Several models for predicting the viscosity especially of the metallurgical slag have been developed in the past; for example, it starts with the earliest available Urbain model [1] for any slag system, followed by the quasi-chemical viscosity model for fully liquid slags in an Al 2 O 3 -CaO-FeO-MgO-SiO 2 system [2], quasi-chemical viscosity model for partly crystallized and fully liquid slags in an Al 2 O 3 -CaO-FeO-SiO 2 system [3,4], quasi-chemical viscosity model for fully liquid slag in an Al 2 O 3 -CaO-MgO-SiO 2 system [5,6], structurally based viscosity model for fully liquid slags in a CaO-MgO-Al 2 O 3 -FeO-SiO 2 system [7], a model based on the optical basicity [8], model based on a new definition of the basicity ratio close to Bell's basicity [9], and finally the KTH (Kungliga Tekniska Hoegskolan Stockholm) model based on the Eyring equation [10]. All the above models start with relating the viscosity to the bridging and non-bridging oxygen atoms available in the respective oxide ion.…”

Section: Introductionmentioning

confidence: 99%

Viscosity of BOF Slag

Kovtun

Korobeinikov

Srishilan

et al. 2020

Metals

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The viscosities of the industrial basic oxygen furnace (BOF) slag with varying compositions of MgO, Al2O3, TiO2, and MnO were continuously measured at a temperature range between 1400 and 1700 °C using the rotating bob method. Three characteristic temperatures for the melting behavior of the BOF slag were investigated using a high-temperature microscope. The solid fraction of the slag was calculated by FactSage 7.2 using the FTOxid database. General observations from the experimental data show that the increase in MgO tends to increase viscosity. However, Al2O3, TiO2, and MnO decrease viscosity up to a certain level, and beyond that, they also increase the viscosity. The measured values of the viscosity of BOF slags were compared and discussed with known data from the literature. Finally, the activation energy of BOF slags with different compositions of MgO, Al2O3, TiO2, and MnO was calculated in the temperature range of industrial operations.

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Section: Introductionmentioning

confidence: 99%

Viscosity of BOF Slag

Kovtun

Korobeinikov

Srishilan

et al. 2020

Metals

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“…21,22 Slag viscosity is very sensitive to melt structure, and the viscosity estimation model of molten slag must take its structure into account. Some scholars 23 constructed a structure−viscosity equation for the specific system in which all the ions have the definite structural roles, but this method is not applicable to the system with the ions having complex structural roles in different compositions. The structural theory of bridging oxygen has attracted extensive attention with a deeper understanding of molten slag.…”

Section: ■ Introductionmentioning

confidence: 99%

Viscosity Estimation of Multicomponent Slags of the CaO–SiO₂–Al₂O₃–Fe_xO System Based on Microstructure Analysis

et al. 2020

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Slag viscosity is key factor of liquid steel refining and the smooth slag tapping of entrained flow coal gasifiers, and the accurate estimation of slag viscosity can provide a guidance for the selection of industrial raw material and the control of industrial process. In this study, a structure-related viscosity model about the multicomponent slags of the CaO−SiO 2 −Al 2 O 3 −Fe x O system is developed based on the flow mechanism of silicate melt to improve slag viscosity behavior. The present estimation model improved the expression of activation energy equation on the basis of the model proposed by Nakamoto and expanded the application from the ternary CaO−SiO 2 −Al 2 O 3 system to the quaternary CaO−SiO 2 −Al 2 O 3 −Fe x O system. Then, the structural roles of all the components were clarified, and the types of oxygen bonds were defined by Raman spectroscopy. The fractions of various oxygen bonds were obtained, and the database of oxygen bonds in any composition within the range of experimental slags was generated by utilizing the Lagrange interpolation method. The result showed that the present model had an advantage in estimating slag viscosity within the compositional range of this experiment slag, and the mean deviations between the viscosities calculated by the present model and measured or published viscosities were within 20%. The model will offer a reference for the estimation and adjustment of slag behavior in the metallurgical slag or coal slag, especially for the iron-rich system.

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Structural and Viscous Insight into Impact of MoO3 on Molten Slags

Chen

Zeng

Liu

et al. 2021

Metall Mater Trans B

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A Structurally-based Viscosity Model of the Fully Liquid Slags in the CaO–MgO–Al<sub>2</sub>O<sub>3</sub>–FeO–SiO<sub>2</sub> System

Cited by 4 publications

References 37 publications

Viscosity of BOF Slag

Viscosity of BOF Slag

Viscosity Estimation of Multicomponent Slags of the CaO–SiO₂–Al₂O₃–Fe_xO System Based on Microstructure Analysis

Structural and Viscous Insight into Impact of MoO3 on Molten Slags

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A Structurally-based Viscosity Model of the Fully Liquid Slags in the CaO–MgO–Al<sub>2</sub>O<sub>3</sub>–FeO–SiO<sub>2</sub> System

Cited by 4 publications

References 37 publications

Viscosity of BOF Slag

Viscosity of BOF Slag

Viscosity Estimation of Multicomponent Slags of the CaO–SiO2–Al2O3–FexO System Based on Microstructure Analysis

Structural and Viscous Insight into Impact of MoO3 on Molten Slags

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Viscosity Estimation of Multicomponent Slags of the CaO–SiO₂–Al₂O₃–Fe_xO System Based on Microstructure Analysis