Phase equilibriums in the “liquid metal – nonmetallic and intermetallic complex phases, including molten slags, fluxes and salts” systems

摘要

The system of the thermodynamic analysis of processes in the presence of liquid metal is elaborated. It allows sufficiently and thermodynamically adequately describe the processes which occur in processes of interaction of metal melts with complex composition and equilibrium complex phases (nonmetallic and intermetallic, including molten slags, fluxes and salts) which are in different state of matter. The created system is based on calculating coordinates of the surfaces of components solubility in metal melt (SCSM). These are special multicomponent phase diagram, which allows to adjust the microchanges in the metal alloy in accordance with the qualitative change in the composition of the complex phases. They allow to solve numerous problems connected with the development and optimization of various technological processes. Particularly it concerns the following problems: rational metal refining and evaluating complex alloys structures, determining the limits of technological additives refining effect and sequences of nonmetallic phases under temperature or metal structure changes. During this work SCSM of the systems on the basis of copper, cobalt, nickel, aluminum, lead, bismuth, tin and indium for a wide range of composition and temperatures is plotted. The results of calculating the surfaces of components solubility in metal melt have been compared with the data presented in relevant scientific papers and the results of own experiments, namely the X-ray microanalysis of nonmetallic and intermetallic inclusions formed in metal melts, with different contents of impurities in metal structure.