Stovba Y. Physic-chemical analysis of phase's nonequilibrium interactions at high carbonaceous ferromanganese manufacture for the purpose of process intensification

Dissertation is devoted to the analysis of nonequilibrium state of main reaction occur at a high carbonaceous ferromanganese melting as well as to the determination on this base of values of actual nonequilibrium coefficients of elements distribution between slag and metal. In order to develop of process dynamic model the pattern of physic-chemical interaction between slag and metal at formation of ferromanganese final chemistry as well as the kinetic factors of consumption of carbonaceous reduction agent for elements reduction in the system Fe-Mn-Si-O-C were done with regard to flux and non-flux techniques of ferromanganese melting. By processing of literature and own experimental data on kinetic of elements reduction from liquid slag the formula for the carbon consumption determination for dependent on slag chemistry process was found. The model of physic-chemical interaction at Mn-Fe-C melt formation into ore-smelting furnace was developed. The actual (nonequilibrium) coefficients of elements distribution between slag and metal were used for the draw up of the balance equations that are the basis for construction of the process mathematic model. There were methodic developed for the calculation of the metal chemistry is equilibrium with a slag. The investigation of a slag chemistry and temperature effect on the equilibrium compound of the metal were made. The estimation of possibility of carbon oxidation reaction running into the furnace bath at ferromanganese manufacture was done. By the physical simulation methods the researches have been carried out in order to investigate of the transfer into bubbled metal melt at presence in them of heterogeneous zone. The dynamic model of ferromanganese manufacture has been developed in the form of the system of particular models for separate zones of the furnace along the vertical section of working space. It was shown that for the local zones with different final parameters the flow of metal melts drastically grows after reaching of coke layer. Developed algorithms of calculation an equilibrium compound of metal and slag by static model of carbonaceous ferromanganese manufacture subject to the nonequilibrium state of main reaction were delivered as software to OJSC NZF for proper researches.