Evaluation of existing viscosity data and models and developments of new viscosity model for fully liquid slag in the SiO2-Al2O3-CaO-MgO system

Han, Chen, Chen, Mao, Zhang, Weidong, Zhao, Zhixing, Evans, Tim and Zhao, Baojun (2016) Evaluation of existing viscosity data and models and developments of new viscosity model for fully liquid slag in the SiO2-Al2O3-CaO-MgO system. Metallurgical and Materials Transactions B, 47 5: 1-14. doi:10.1007/s11663-016-0744-4


Author Han, Chen
Chen, Mao
Zhang, Weidong
Zhao, Zhixing
Evans, Tim
Zhao, Baojun
Title Evaluation of existing viscosity data and models and developments of new viscosity model for fully liquid slag in the SiO2-Al2O3-CaO-MgO system
Formatted title
Evaluation of existing viscosity data and models and developments of new viscosity model for fully liquid slag in the SiO2-Al2O3-CaO-MgO system
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2016-01-01
Year available 2016
Sub-type Article (original research)
DOI 10.1007/s11663-016-0744-4
Open Access Status Not Open Access
Volume 47
Issue 5
Start page 1
End page 14
Total pages 14
Place of publication New York, NY United States
Publisher Springer New York
Language eng
Subject 3104 Condensed Matter Physics
2211 Mechanics of Materials
2506 Metals and Alloys
2505 Materials Chemistry
Abstract Metallurgical properties of slag are determined to a great extent by its viscosity. High-temperature viscosity measurements are time-consuming and expensive. It is necessary to develop an accurate viscosity model for blast furnace slag in the SiO-AlO-CaO-MgO system using reliable viscosity data. This paper describes a systemic evaluation procedure to determine the viscosity data to be used for model development. 1780 viscosity data from 10 to 65 wt pct SiO, 3.5 to 40 wt pct AlO, 2 to 60 wt pct CaO, and 2 to 38 wt pct MgO in the SiO-AlO-CaO-MgO system have been accepted for model evaluation after critical reviews. The existing 14 viscosity models in SiO-AlO-CaO-MgO system is also reviewed and evaluated. Based on the structure of alumina-silicate slag and evaluated viscosity data, a new viscosity model has been proposed for the system SiO-AlO-CaO-MgO. A new term “probability,” based on the basic oxide and electronegativity, is introduced to calculate the integral activation energy of slag. The model has been evaluated and compared with existing viscosity models in three different composition ranges in SiO-AlO-CaO-MgO system for different applications. The new model reports an outstanding agreement between predictions and experimental data. The industrial implications of the new model have also been discussed in ironmaking and steelmaking processes.
Formatted abstract
Metallurgical properties of slag are determined to a great extent by its viscosity. High-temperature viscosity measurements are time-consuming and expensive. It is necessary to develop an accurate viscosity model for blast furnace slag in the SiO2-Al2O3-CaO-MgO system using reliable viscosity data. This paper describes a systemic evaluation procedure to determine the viscosity data to be used for model development. 1780 viscosity data from 10 to 65 wt pct SiO2, 3.5 to 40 wt pct Al2O3, 2 to 60 wt pct CaO, and 2 to 38 wt pct MgO in the SiO2-Al2O3-CaO-MgO system have been accepted for model evaluation after critical reviews. The existing 14 viscosity models in SiO2-Al2O3-CaO-MgO system is also reviewed and evaluated. Based on the structure of alumina-silicate slag and evaluated viscosity data, a new viscosity model has been proposed for the system SiO2-Al2O3-CaO-MgO. A new term “probability,” based on the basic oxide and electronegativity, is introduced to calculate the integral activation energy of slag. The model has been evaluated and compared with existing viscosity models in three different composition ranges in SiO2-Al2O3-CaO-MgO system for different applications. The new model reports an outstanding agreement between predictions and experimental data. The industrial implications of the new model have also been discussed in ironmaking and steelmaking processes.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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Created: Tue, 12 Jul 2016, 19:24:16 EST by Mr Mao Chen on behalf of School of Chemical Engineering