Thermodynamics and Mechanism of Silicon Reduction by Carbon in a Crucible Reaction

In the paper, the author has represented a thermodynamic analysis of a crucible reaction, which takes place in crucible induction furnaces. The author has suggested a diagram of a crucible reaction that took into account partial pressure and activity of the components participating in the process. The author has defined more exactly what effect the elements usually present in cast iron (Mn, S, P) and main alloying elements (Cr, Ni, Al, Cu) had on activity and equilibrium concentrations of carbon and silicon in cast iron. The electrochemical mechanism of a crucible reaction has been studied. The author has proved that electrical current had influence on the process. The obtained data allow improving the technology of cast iron induction melting.