Archives of Metallurgy and Materials

Abstract

A new method for description of thermodynamic properties of Cu-S mixtures is put forward. The basic feature of this method is the assumption that the activity coefficient of sulphur dissolved in liquid copper is equal to 1 for infinite dilute solution (γ [S] = 1 for x [S] = 0). In consequence the following relationships were established:1. The equilibrium constant for the reaction of sulphur dissolution in liquid copper (0.5S 2 (g) = [S] Cu ):[S] 12300 ln 5.4820 K T2. Non-temperature dependence of the activity coefficient of sulphur dissolved in the copper-reach liquid (Liquid I):3. The chemical potential of the sulphur dissolved in copper in infinite dilute solution:12404 99.643 J (mol[S]) T 4. Non-temperature dependence of the activity of sulphur in Cu-S sulphur-rich liquid (Liquid II) -Fig. 6. 5. Non-temperature dependence of the activity of copper in Cu-S sulphur-rich liquid (Liquid II) -Fig. 7. 6. The equilibrium constant for the reaction of sulphur removal from liquid copper ([S] Cu + 2[O] Cu = SO 2 (g)