Experimental Study and Thermodynamic Re-optimization of the FeO-Fe2O3-SiO2 System

Abstract

Phase equilibria and thermodynamic data in the FeO-Fe 2 O 3 -SiO 2 system were critically reviewed. New experiments were undertaken to resolve discrepancies found in previous data. The liquid oxide/slag phase was described using the modified quasichemical model. New optimized parameters of the thermodynamic models for the Gibbs energies of slag and other phases in the selected system were obtained. The new parameters reproduce all available phase equilibria and thermodynamic data within the experimental error limits from 298 K (25°C) to above the liquidus temperatures at all compositions and oxygen partial pressures from metal saturation to 1 atm of O 2 . This study was carried out as part of the development of a selfconsistent thermodynamic database for the Al-Ca-Cu-FeMg-Si-O-S multi-component system.

Integrated experimental study and thermodynamic modelling of the distribution of arsenic between phases in the Cu-Fe-O-S-Si system

“…Complete thermodynamic assessment of the Cu-Fe-O-S-Si system and all subsystems was recently presented [29][30][31][32][33][34][35][36][37][38][39].…”

“…Thermodynamic model parameters for the Cu-Fe-O-S-Si system without As were presented in earlier publications [29][30][31][32][33][34][35][36][37][38][39].…”

Thermodynamic database for multicomponent oxide systems

“…It is also essential for simulating interactions of refractories with slags and metals, as well as for many other industrial applications. This chemical system has been optimized from 25 °C to above the liquidus temperatures at all compositions and oxygen partial pressures from equilibrium with metals to equilibrium with oxygen [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Sb distribution in the phases of SiO2 saturated Sb-Fe-O-SiO2-CaO system in air

“…To develop accurate descriptions of the high-order systems, the phase relations of simple binary and ternary systems should be investigated. The phase relations of the CaO-SiO2, FeO-Fe2O3-SiO2, and FeOx-CaO-SiO2 subsystems have been systematically studied by several researchers using hightemperature experiments and rapid quenching technique [6][7][8][9][10][11][12][13]. The phase relations of FeO-Fe2O3-SiO2 system in equilibrium with O2 pressures ranging from 10 -10.9 to 1 atm have been studied and two ternary invariant points were determined in this system.…”