Effect of Oxygen Partial Pressure and Temperature on Liquidus for the CaO-SiO₂-FeO_x-Al₂O₃ System

Abstract:

To provide essential data for an efficient utilization of vitrified bottom ash slag, the thermodynamic properties of the CaO-Al₂O₃-SiO₂-FeO_x-MgO-Na₂O oxide system is highly required. As one of the related oxide subsystems, the equilibrium phase relations and liquidus of CaO-SiO₂-FeO_x-Al₂O₃ system is of great significance to interpret and predict the thermodynamic properties in multi-component oxide systems. In this paper, phase diagrams for the CaO-Al₂O₃-FeO_x and SiO₂-Al₂O₃-FeO_x systems were calculated by using CALPHAD method with FactSage program. The liquid phase area changed with changing oxygen partial pressure from 1Pa to 10^-3Pa and temperature from 1673K to 1773K. The equilibrium phase relations of CaO-Al₂O₃-FeO_x and SiO₂-Al₂O₃-FeO_x systems were discussed.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 2279-2282
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.2279
• Online since: July 2011
• Authors: Nan Wang, Zong Shu Zou, Zhan Zhang, Yan Xiao, Yong Yang
• Keywords: CaO-SiO₂-FeO_X-Al₂O₃ System, Liquidus, Oxygen Partial Pressure, Vitrified Bottom Ash

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