Experimental Phase Equilibria Studies in the FeO-Fe2O3-CaO-SiO2 System in Air: Results for the Iron-Rich Region

New experimental data are reported on the liquidus and sub-liquidus phase equilibria in the FeO-Fe 2 O 3 -CaO-SiO 2 system in air. The study was undertaken using equilibration/quenching and microanalysis techniques enabling the compositions of the liquid and solid phases in equilibrium at temperatur...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2020-08, Vol.51 (4), p.1587-1602
Main Authors: Cheng, Siyu, Shevchenko, Maksym, Hayes, Peter C., Jak, Evgueni
Format: Article
Language:English
Subjects:
Calcium ferrites
Calcium oxide
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composition
Cooling
Dicalcium silicate
Equilibrium
Hematite
Iron compounds
Iron oxides
Liquid phases
Liquidus
Materials Science
Melt temperature
Metallic Materials
Microscopy
Nanotechnology
Phase equilibria
Silica
Silicon dioxide
Sintering
Slag
Solid phases
Solid solutions
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:New experimental data are reported on the liquidus and sub-liquidus phase equilibria in the FeO-Fe 2 O 3 -CaO-SiO 2 system in air. The study was undertaken using equilibration/quenching and microanalysis techniques enabling the compositions of the liquid and solid phases in equilibrium at temperature to be accurately measured. The limits of stability and associations of the primary phase fields of hematite (Fe 2 O 3 ), dicalcium silicate (Ca 2 SiO 4 ), silico-ferrite of calcium solid solution (SFC), dicalcium ferrite (Ca 2 Fe 2 O 5 ), calcium ferrite (CaFe 2 O 4 ), calcium diferrite (CaFe 4 O 7 ) have been characterized in the high iron, high CaO/SiO 2 , low melting temperature region of the system. The full extent of the primary phase field of SFC has been determined, as have the conjugate lines joining the SFC and the corresponding liquid phase over the range of SFC compositions at sub-liquidus temperatures.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-020-01886-w