LIQUIDUS AND PHASE EQUILIBRIA IN CaO-Al2O3-FeOX-SiO2 SYSTEM UNDER INTERMEDIATE OXYGEN PARTIAL PRESSURE

作者：Wang N^*; Chen M; Zou Z; Zhang Z; Xiao Y; Yang Y

来源：Journal of Mining and Metallurgy Section B-Metallurgy, 2013, 49(2): 139-144.

DOI：10.2298/JMMB120826014W

• CaO-Al2O3-FeOx-SiO2 system
• Liquidus
• Phase equilibria
• Intermediate oxygen partial pressure

Liquidus and phase equilibria in CaO-Al2O3-FeOx and CaO-Al2O3-FeOx-SiO2 systems under intermediate oxygen partial pressures of 10.13Pa and 1.01x10(-1)Pa have been experimentally investigated, by means of high temperature equilibration, quenching technique, Scanning Electronic Microscope with Energy Dispersive Spectrometer (SEM-EDS), and X-ray Diffraction (XRD). For CaO-Al2O3-FeOx system, both two-phase coexistence and three-phase coexistence, including liquid, CaAl2O4, CaAl4O7 and spinel, are observed in high Al2O3 zone at mentioned oxygen partial pressures, but the equilibrated phases at at 1450 degrees C are a little different from those at 1550 degrees C. With addition of 10mass% SiO2, melilite phase was found around the primary phase field of CaAl4O in CaO-Al2O3-FeOx-SiO2 system. The liquidus data around the boundaries of CaAl2O4 and CaAl4O7 primary phase fields in CaO-Al2O3-FeOx system are obtained under the two intermediate oxygen partial pressures, and the effect of oxygen partial pressure on the liquidus has been discussed.

• 出版日期2013
• 单位东北大学