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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nicol, S.
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Topics
Publications (4/4 displayed)
- 2020Effect of the CaO/SiO2 ratio on the controlled solidification of ‘Fe2O3’-CaO-SiO2 melts in aircitations
- 2019Controlled solidification of liquids within the SFC primary phase field of the “Fe2O3”-CaO-SiO2 system in aircitations
- 2019Microstructure evolution during controlled solidification of “Fe2O3”-CaO-SiO2 liquids in aircitations
- 2018Experimental liquidus studies of the Pb-Cu-Si-O system in equilibrium with metallic Pb-Cu alloyscitations
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article
Controlled solidification of liquids within the SFC primary phase field of the “Fe2O3”-CaO-SiO2 system in air
Abstract
To provide fundamental information on the phases and microstructures formed during sintering, a liquid with a bulk composition within the silico ferrite of calcium (SFC) primary phase field in the ternary “FeO”-CaO-SiO system in air was solidified at a controlled rate. Samples of a bulk composition with a CaO/SiO ratio of 4.00 and 69.24 wt pct FeO, were cooled from 1623 K (1350 °C) at 2 K/s, with samples quenched at temperatures between 1513 K (1240 °C) to 1453 K (1180 °C). The silico ferrite of calcium and aluminium I (SFCA-I) and CaFe Fe O phases were observed to form an intergrowth (‘SFC-I’) rather than the anticipated SFC phase. Solidification was found to occur in three stages, Liquid + ‘SFC-I’, Liquid + ‘SFC-I’ + CS + CF, and CS + CF + CF, where CS denotes dicalcium silicate, CF denotes calcium ferrite and CF denotes calcium diferrite. The phases formed and the solidification sequence differ from those predicted under equilibrium and Scheil–Gulliver Cooling. Although not directly applicable to industrial operations, this research clearly shows that the formation of both the SFCA and SFCA-I phase in iron ore sinters is controlled by kinetic processes rather than equilibrium conditions.