Download or read book Thermodynamic Modeling of MgO-P2O5, MnO-P2O5 and CaO-MgO-P2O5 Systems written by Gabriel Garcia Curiel and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "As part of a sustained effort to model and simulate the thermodynamic behavior of steelmaking slag, binary and ternary phase diagram systems have been modeled using the CALPHAD (CALculation of PHAse Diagrams) approach. The understanding, modeling and thermodynamic simulation of oxide systems including phosphorus oxide are of special importance to the steelmaking industry given requirements for steels with ever lower phosphorus contents while facing the processing of ores with increasing phosphorus content.In this project, two binary systems (MgO-P2O5 and MnO-P2O5) and one ternary system (CaO-MgO-P2O5) were modeled to extend the oxide database of the Factsage thermodynamic simulation software package. This present study is part of a broader effort conducted to develop a comprehensive thermodynamic database for the CaO-MgO-MnO-FeO-Fe2O3-Al2O3-Na2O-P2O5 / Fe Liq. system and allow the thermodynamic simulation of steelmaking processes such as dephosphorization. All available experimental data in the literature were critically assessed and a set of thermodynamic model parameters were developed to simulate reliably the experimental results within experimental error limits. The properties of liquid oxides and solid P2O5 compounds were described by thermodynamic models and standard Gibbs energy functions.The thermodynamic property of the liquid solution (or slag) were described using the Modified Quasi-Chemical Model (MQM) developed by Pelton et. al. (2000). This model allows to simulate short range ordering (SRO). Thermodynamic properties of solid solution phases are described using the Compound Energy Formalism (CEF) by Hillert (2000) which considers the crystal structure of each solid solution." --