Journal
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
Volume 68, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2019.101721
Keywords
Phase equilibria; Liquidus temperature; FactSage prediction; Inclusion
Categories
Funding
- Australian Government through the Australian Research Council Research Hub for Computational Particle Technology
- University of Queensland International Research Tuition Award
- China Scholarship Council
- Baosteel through Baosteel-Australia Joint Research and Development Centre
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In the steelmaking process, the compositions of the oxide inclusions could be modified by refining slags to a large extent. The chemistries of the oxide inclusions and refining slags can be described by the system CaO-SiO2-Al2O3-MgO. Phase equilibria and liquidus temperatures in this system have been experimentally investigated in the composition and temperature ranges related to the oxide inclusions and refining slags by means of high-temperature equilibration, quenching and electron probe X-ray microanalysis. Isotherms in the interval of 20 degrees C between 1260 and 1560 degrees C were determined in the primary phase fields of wollastonite, anorthite, spinel, and melilite. Effects of the mass ratio of (Al2O3+SiO2)/((Al2O3+SiO2)+(CaO+SiO2)) and MgO content on the liquidus temperatures have been discussed to assist inclusion control. To obtain the lowest liquidus temperature of Al2O3-SiO2-CaO-MgO system inclusions, refining time ought to be properly controlled.
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