CALCULATION OF THERMODYNAMIC PROPERTIES AND PHASE DIAGRAM OF TERNARY MOLTEN SALT SYSTEM NaCl-CaCl_2-SrCl_2 BY USE OF COMPUTOR

The Gibbs energies of the liquid and solid phases in the CaCl_2-SrCl_2 system have been calculated using the information available on the phase diagram.The Gibbs energy of the liquid phase in the ternary system NaCl-CaCl_2-SrCl_2 has been predicted from the binary properties by applying a modified version of Toop's method.The partial Gibbs energies and the activity coefficients were then calcula- ted by using computer.On the basis of above calculated results and the principle of phase equilibrium the NaCl-CaCl_2-SrCl_2 phase diagram have also been compu- ted using a program.All these calculations are important for the practice of sodium electrolysis and utilization of salt lake resources.The subregular solution model and the modified version of Toop's method are expected to be suitable for calculating a series of assymetric ternary molten salt systems of potential interests, such as NaCl-CaCl_2-BaCl_2,NaCl-SrCl_2-BaCl_2,NaCl-CaCl_2-MgCl_2,KCl-CaCl_2- MgCl_2,KCl-NaCl-CeCl_3 and so on.