Adjustment of thermodynamical parameter base for modeling copper melt fire refining

Phase diagrams of Cu2O-SiO2 and NiO-SiO2 binary silicate systems have been calculated, using the theory of subregular ionic solutions. Equilibria in the Cu-Si-O system in presence of copper melt have been described by means of thermodynamic calculations. Thermodynamic parameters necessary for the calculation have been improved and adjusted to each other. Results of phase diagram calculation were compared with literature data.