Abstract
The vapour Pressures of PbS in the moltem Cu2S-FeS-PbS system have been measured by means of the transportation method at 1150°C The activity of PbS exhibited nearly negative behavior and the data obtained was used to calculate the activities of other components and slight negative deviations of acu2s and aFes from Raoult's law were observed in the molten Cu2S-FeS-PbS system.
The activities of Cu2S and FeS of Cu2S-FeS melts were calculated by Darken's method extrapolated from Cu2S-FeS-PbS system to Cu2S-FeS system, and they showed negative deviation from ideality.
Furthermore, the distribution behavior of Pb between matte and slag was explained by thermodynamic analysis.
