TY - JOUR

T1 - Properties of liquid CaO–SiO2 and CaO–SiO2-‘Fe2O3’tot slags measured by a combination of maximum bubble pressure and rotating bob methods

AU - Cheremisina, Elizaveta

AU - Kovtun, Oleksandr

AU - Yehorov, Anton

AU - Volkova, Olena

AU - Schenk, Johannes

N1 - Funding Information: The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research program of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian program for competence centers. COMET is funded by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology, the Federal Ministry for Labour and Economy, the Federal States of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG) and the Standortagentur Tyrol. Furthermore, Upper Austrian Research continuously supports K1-MET. Beside the public funding from COMET, the research project is partially financed by the scientific partners Montanuniversitaet Leoben and University of Applied Sciences - Upper Austria, and the industrial partners Lhoist Recherche et Développement, Primetals Technologies Austria, RHI Magnesita, voestalpine Stahl and voestalpine Stahl Donawitz. The authors are thankful to the Institute of Iron and Steel Technology, TU Bergakademie Freiberg for the viscosity, density and surface tension measurements and conduction of chemical analysis. Funding Information: The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research program of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies) , the Austrian program for competence centers. COMET is funded by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology , the Federal Ministry for Labour and Economy , the Federal States of Upper Austria , Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG) and the Standortagentur Tyrol. Furthermore, Upper Austrian Research continuously supports K1-MET. Beside the public funding from COMET, the research project is partially financed by the scientific partners Montanuniversitaet Leoben and University of Applied Sciences - Upper Austria , and the industrial partners Lhoist Recherche et Développement, Primetals Technologies Austria, RHI Magnesita, voestalpine Stahl and voestalpine Stahl Donawitz. Publisher Copyright: © 2023

PY - 2023/6/27

Y1 - 2023/6/27

N2 - Liquid slag properties are essential for understanding complex mass and momentum phenomena in metallurgical operations. The density, surface tension and viscosity were measured in six silicate-rich slags of the CaO–SiO2 and CaO–SiO2-‘Fe2O3’tot systems by combining the maximum bubble pressure and rotating bob methods. The properties investigated were sensitive to the temperature, SiO2 and Fe2O3 contents. Different experimental trends were derived due to the amphoteric properties of Fe2O3. The slags with ferric oxide were denser than the silicate melts. Surface tension gradually decreased with temperature and indicated firstly a rise and then decline with further Fe2O3 addition. Raman spectra were analyzed to provide structural information of the polymer melt and indicated an enhancement in the polymerization degree with Fe3+. The derived experimental trends and role of Fe3+ in the silicates were attributed to the interplay of complex factors: different bonding in the melt, cation interactions and the oxidation state of iron. The influence of Fe3+/Fe2+ on the melt properties was discussed. Previous article in issue

AB - Liquid slag properties are essential for understanding complex mass and momentum phenomena in metallurgical operations. The density, surface tension and viscosity were measured in six silicate-rich slags of the CaO–SiO2 and CaO–SiO2-‘Fe2O3’tot systems by combining the maximum bubble pressure and rotating bob methods. The properties investigated were sensitive to the temperature, SiO2 and Fe2O3 contents. Different experimental trends were derived due to the amphoteric properties of Fe2O3. The slags with ferric oxide were denser than the silicate melts. Surface tension gradually decreased with temperature and indicated firstly a rise and then decline with further Fe2O3 addition. Raman spectra were analyzed to provide structural information of the polymer melt and indicated an enhancement in the polymerization degree with Fe3+. The derived experimental trends and role of Fe3+ in the silicates were attributed to the interplay of complex factors: different bonding in the melt, cation interactions and the oxidation state of iron. The influence of Fe3+/Fe2+ on the melt properties was discussed. Previous article in issue

KW - Density

KW - Iron-containing polymer

KW - Surface tension

KW - Viscosity

UR - http://www.scopus.com/inward/record.url?scp=85163476247&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2023.06.266

DO - 10.1016/j.ceramint.2023.06.266

M3 - Article

AN - SCOPUS:85163476247

VL - 49.2023

SP - 30104

EP - 30114

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 18

ER -