Development of a Quasi-chemical Viscosity Model for Fully Liquid Slags in the Al2O3–CaO–‘FeO’–MgO–SiO2 System: The Revised Model to Incorporate Ferric Oxide

Suzuki, Masanori; Jak, Evgueni

doi:10.2355/isijinternational.54.2134

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…In order to verify the accuracy of the FactSage software for the viscosity calculation, six different slag systems were presented: In the CSAM slag system, the apparatus for viscosity measurement adopted by Pengcheng and Xiaojung (2016), Shankar et al (2007) andTang et al (2011) were made by the rotating cylinder method at 1723 K (1450 °C) to 1823 K (1550 °C). This measurement method was also applied in other studies (Ji et al, 1997;Wu et al, 2011;Zhang and Chou, 2012;Chen and Zhao, 2015) in the CSAK, CSAMF and CAFeO slag systems.…”

Section: Methodsmentioning

confidence: 99%

“…The quaternary slags in the CSAM system play a very important role in the steelmaking process, in view of the oxides commonly employed (Song et al, 2011). Therefore, studies (Machin et al, 1952;Shankar et al, 2007;Tang et al, 2011;Pengcheng and Xiaojun, 2016) have been conducted on the viscosity measurement of CSAM slag systems.…”

Section: Viscosity Of the Cao-sio 2 -Al 2 O 3 -Mgo Systemmentioning

confidence: 99%

“…The authors (Chen and Zhao, 2016) also evaluated the accuracy in viscosity calculation compared to the measured values with different models besides FactSage software, but only for the CaO-SiO 2 -K 2 O. A lower agreement in the high order systems may be attributed to the possible experimental data errors from literature (Suzuki and Jak, 2014) or still result from complicated interactions between the cations and anions that make the predictions and modeling of slag viscosity quite difficult (Rosypalová et al, 2014). Thus, both methods of obtaining slag viscosity can carry some degree of uncertainty in the results.…”

Section: Figurementioning

confidence: 99%

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Assessment of viscosity calculation for calcium-silicate based slags using computational thermodynamics

et al. 2018

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This study focuses on the viscosity calculation of molten slags using computational thermodynamics. Different slag systems and their measured viscosities from different references were used and compared with those obtained through FactSage software. To calculate the viscosity of each slag the Viscosity module available in Fact-Sage 6.4 was used. In order to perform the evaluation of computational thermodynamics in viscosity calculation, six different slag systems were presented, all of which were formed of calcium-silicate melts. In total, 162 slags, in temperatures ranges from 1423 K (1150 ºC) to 2089 K (1816 °C) were presented for all slag systems. The software showed a tendency to produce viscosity values lower than those found in the literature measured by an experimental method. The relative deviation between the measured and calculated viscosity values is in the range of 13.31 to 37.53% for evaluated systems. Considering all references and systems, the average deviation between measured and calculated viscosities is 23.61%, which, according to literature, is an acceptable value. The CaO-SiO 2 -Al 2 O 3 and CaO-SiO 2 -FeO systems showed the best agreement between the experimental method and the method calculated through FactSage 6.4 with a very good fitting between viscosity values.

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Section: Methodsmentioning

confidence: 99%

Section: Viscosity Of the Cao-sio 2 -Al 2 O 3 -Mgo Systemmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Assessment of viscosity calculation for calcium-silicate based slags using computational thermodynamics

et al. 2018

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“…In the past decades, a wide variety of models has been proposed by researchers. [11][12][13][14][15][16][17][18][19][20] However, most were developed to deal with molten silicate slags. When it comes to TiO 2 -bearing slags (TiO 2 < 40 mass pct), only a few viscosity models [21,22] are applicable.…”

Section: Introductionmentioning

confidence: 99%

Modeling Viscosity of High Titania Slag

Tang

et al. 2020

Metall Mater Trans B

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TiO2-FeO-Ti2O3 slag system is the dominant system for industrial high-titania slag production. In the present work, viscosities of TiO2-FeO and TiO2-FeO-Ti2O3 systems were experimentally determined using the concentric rotating cylinder method under argon atmosphere. A viscosity model suitable for the TiO2-FeO-Ti2O3 slag system was then established based on the modification of the Vogel-Fulcher-Tammann (VFT) equation. The experimental results indicate that completely melted high-titania slags exhibit very low viscosity of around 0.8 dPa s with negligible dependence on temperature and compositions. However, it increases dramatically with decreasing temperature slightly below the critical temperature. Besides, the increase in FeO content was found to remarkably lower the critical temperature, while the addition of Ti2O3 increases it. The developed model can predict the viscosities of the TiO2-FeO-Ti2O3 and TiO2-FeO systems over wide ranges of compositions and temperatures within experimental uncertainties. The average relative error for the present model calculation is < 18.82 pct, which is better than the previously developed models for silicate slags reported in the literature. An iso-viscosity distribution diagram was made for the TiO2-FeO-Ti2O3 slag system, which can serve as a roadmap for the Ilmenite smelting reduction process as well as the high titania slags tapping process.

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“…Many models have been reported to estimate the viscosity of molten slags using different ways in the past several decades. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, few models could accurately predict high basicity (C/S=w(CaO)/ w(SiO 2 )) slag, and most of them were based on limited experimental data. In addition, the complicated and variable structures of multi-component aluminosilicate melts were the difficulty of model estimation for these kinds of slags.…”

Section: Introductionmentioning

confidence: 99%

A Structurally-based Viscosity Model of the Fully Liquid Slags in the CaO–MgO–Al2O3–FeO–SiO2 System

2019

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Development of a Quasi-chemical Viscosity Model for Fully Liquid Slags in the Al2O3–CaO–‘FeO’–MgO–SiO2 System: The Revised Model to Incorporate Ferric Oxide

Cited by 10 publications

References 30 publications

Assessment of viscosity calculation for calcium-silicate based slags using computational thermodynamics

Assessment of viscosity calculation for calcium-silicate based slags using computational thermodynamics

Modeling Viscosity of High Titania Slag

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

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