Yasinskaya E. Research of conformity to the law of liquid-phase renewal of metals and development of technology of smelting of casting alloys from oxide materials

The dissertation is devoted to research of process of liquid-phase renewal of iron and alloying elements from oxide compositions. The physicochemical, heat and mass exchange processes which take place in the melt bath during liquid-phase renewal were investigated. The methods of mathematical analysis, energy dispersion, chemical analysis, vacuum melting of metal sample, optical and electron microscopy, energy intensity and process effectiveness analytical estimation were used at the work. On the basis of results of investigations was determinate that metals oxide renewal take place in a hard-liquid phase, intensive stirring of which provide the high level of metals renewal and metal basis yield in result of intensification of heat- and mass exchange processes. The new methods of charge, energy intensity, and additional expenses calculation were proposed for metals liquid-phase renewal process realization. The line t of alloy production technologies were developed according to investigations. Particularly, the technology of high-carbon ferrochrome (chrome content 45-48 %) production was created with using spoiled electric furnace melting slag instead of chromic ore. The technology passed to the PrJSC "Ferrotreyding" (Zaporozhie) for manufacturing application.