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Measurements and Model Estimations of Viscosities of the MnO-CaO-SiO2-MgO-Al2O3 Melts
Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Dept Phys Chem Met, Beijing 100083, Peoples R China..
Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Dept Phys Chem Met, Beijing 100083, Peoples R China..
Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Dept Phys Chem Met, Beijing 100083, Peoples R China..
Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China..
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2019 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 50, no 1, p. 376-384Article in journal (Refereed) Published
Abstract [en]

The viscosities of the MnO (0 to 55 mass pct)-CaO-SiO2-MgO (5 mass pct)-Al2O3 (20 mass pct) melts were measured by rotating cylinder method in the temperature range from 1573 K to 1873 K (1300 degrees C to 1600 degrees C). The measurements were carried out in the atmosphere of flowing CO/CO2 gas mixture with a volume ratio of 99/1, and molybdenum crucible and spindle were adopted. The results reveal that MnO is a viscosity reducing component, and the effect of MnO is more notable in the melts with higher ratio of CaO to SiO2. For example, in the melts with the mass ratio of CaO to SiO2 equal to 0.6, the addition of 5 mass pct MnO only slightly reduced the viscosities. Comparatively, the addition of 5 mass pct MnO made the viscosities of the melts with the mass ratio of CaO to SiO2 equal to 1.0 and 1.5 decrease remarkably. Based on the measured data, the viscosities estimation model proposed in our previous study was extended to the system containing MnO, and the model parameters were determined. The model can estimate and predict the viscosities of the aluminosilicate melts containing MnO well, and then some iso-viscosity contours of this system were calculated. From the iso-viscosity contours, it can be seen that MnO is almost equivalent to CaO in reducing the viscosities in the melt with high SiO2 content, while with the decrease of the SiO2 content MnO becomes more effective than CaO.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 50, no 1, p. 376-384
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Materials Engineering
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URN: urn:nbn:se:kth:diva-243938DOI: 10.1007/s11663-018-1454-xISI: 000456070300037Scopus ID: 2-s2.0-85056358202OAI: oai:DiVA.org:kth-243938DiVA, id: diva2:1295560
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QC 20190312

Available from: 2019-03-12 Created: 2019-03-12 Last updated: 2019-03-18Bibliographically approved

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Glaser, Björn

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