TY - GEN
T1 - THERMODYNAMIC ANALYSIS OF CaO - SiO2 - Al2O3 - MgO SLAG SYSTEM
AU - Sniegoň, Michal
AU - Tkadlečková, Markéta
AU - Huczala, Tomáš
AU - Michalek, Karel
AU - Chudobová, Lucie
AU - Strouhalová, Michaela
AU - Walek, Josef
AU - Pieprzyca, Jacek
N1 - Publisher Copyright:
© 2021 TANGER Ltd., Ostrava.
PY - 2021
Y1 - 2021
N2 - The paper deals with the possibility of thermodynamic analysis of CaO - SiO2 - Al2O3 - MgO slag system for optimizing of steel desulphurization in a ladle. From the point of view of reducing the sulphur content in steel, the chemical composition of the slag plays a crucial role which affects a critical thermodynamic parameter of the slag, such as the liquidus temperature of the slag, the amount of solid phases in slag at range of refining temperatures, respectively the effective viscosity of slag and CaO saturation in slag. The critical parameters were analyzed in dependence on the content of MgO in slag. The analysis was performed in FactSage 7.2 software. A quaternary graphs of the slag system CaO - SiO2 - Al2O3 - MgO were created with a constant MgO content of 0 wt.%, 5 wt.%, 10 wt.% and 15 wt.%. The results of thermodynamic calculations confirm that the content of MgO among 5 % and 10 % will have a positive effect on expanding the area of the lowest liquidus temperature and therefore better viscosity of slag. On the other hand, the content of MgO above 8 % led to higher content of solid phases which affected negatively the viscosity.
AB - The paper deals with the possibility of thermodynamic analysis of CaO - SiO2 - Al2O3 - MgO slag system for optimizing of steel desulphurization in a ladle. From the point of view of reducing the sulphur content in steel, the chemical composition of the slag plays a crucial role which affects a critical thermodynamic parameter of the slag, such as the liquidus temperature of the slag, the amount of solid phases in slag at range of refining temperatures, respectively the effective viscosity of slag and CaO saturation in slag. The critical parameters were analyzed in dependence on the content of MgO in slag. The analysis was performed in FactSage 7.2 software. A quaternary graphs of the slag system CaO - SiO2 - Al2O3 - MgO were created with a constant MgO content of 0 wt.%, 5 wt.%, 10 wt.% and 15 wt.%. The results of thermodynamic calculations confirm that the content of MgO among 5 % and 10 % will have a positive effect on expanding the area of the lowest liquidus temperature and therefore better viscosity of slag. On the other hand, the content of MgO above 8 % led to higher content of solid phases which affected negatively the viscosity.
KW - Basicity of ladle furnace slag
KW - FactSage
KW - Furnace ladle slag
KW - Properties of ladle furnace slag
KW - Temperature of liquid slag
UR - https://www.scopus.com/pages/publications/85124342692
U2 - 10.37904/metal.2021.4084
DO - 10.37904/metal.2021.4084
M3 - Conference contribution
AN - SCOPUS:85124342692
T3 - METAL 2021 - 30th Anniversary International Conference on Metallurgy and Materials, Conference Proceedings
SP - 46
EP - 52
BT - METAL 2021 - 30th Anniversary International Conference on Metallurgy and Materials, Conference Proceedings
PB - TANGER Ltd.
T2 - 30th International Conference on Metallurgy and Materials, METAL 2021
Y2 - 26 May 2021 through 28 May 2021
ER -