Thermodynamics of the Vitrified Bottom Ash Slag from Municipal Solid Waste Incinerators-Phase Relations of CaO-SiO₂-Na₂O Oxide System

Abstract:

Vitrification is considered to be an attractive technology for municipal solid waste incineration. The main components of the vitrified bottom ash slag are SiO₂, CaO, Al₂O₃, Fe₂O₃, Na₂O and MgO, accounting for more than 90% of the total mass. The phase relations and thermodynamic properties of the CaO-Al₂O₃-SiO₂-FeOx-MgO-Na₂O oxide system is highly required, and is of great significance for optimization of vitrification processing and sustainable resource utilization of melting slag. Thermodynamic properties of the vitrified bottom ash slag were investigated in the present work. A study on the phase equilibria of CaO-SiO₂-Na₂O system was carried out with modelling method.

• Periodical: Advanced Materials Research (Volumes 881-883)
• Pages: 574-578
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.881-883.574
• Online since: January 2014
• Authors: Zhan Zhang, Guang Qiang Li*, Yong Xiang Yang, Yan Ping Xiao
• Keywords: Bottom Ash, CaO-SiO₂-Na₂O System, Phase Diagram, Phase Relation, Vitrification

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