числове моделювання

The requirements for electric contact joints between workpieces in the core columns of Kastner furnaces are formulated. The choice of a material - graphite foam - for making electric contact gaskets is justified. Rational form and thickness of electric contact pads have been determined, the glue for their fixation between electrode blanks has been selected. A mold for forming electrocontact pads has been developed and prototypes of pads of different shapes, thickness and density have been made in order to check their suitability for forming Kastner furnace core under industrial conditions.

The gasification method with the highest value of the syngas calorific value and the prototype of equipment for calcining carbon-containing bulk material are substantiated. A mathematical model of the process of gasification of bulk carbon containing material in a drum-cooler of a rotary kiln was developed, based on a continuous-discrete formulation of the interaction of a mixture of reacting gases with a discrete solid phase, taking into account the turbulent flow regime and thermal radiation.

The physical and mathematical models of the dynamics of the dense motion of a granular medium and the thermoelectric state of a single-phase mine electric furnace during high-temperature heat treatment of carbon material are formulated, on the basis of which the corresponding discrete and continuum numerical models of the physical fields of the electric calciner are developed taking into account the dense motion of the granular medium and chemical interaction.

Energy-saving constructions and regulations of the Castner furnaces operation were developed for graphitization of large-sized electrode workbenches, which have no other analogue in Ukraine and reach energy expenses decrease by 20–25 %. Thermal and electrical furnace state was experimentally investigated during graphitization of electrode workbenches with different expansion blocks. It was found out that gasification process of carbon material by water vapor occurs in operation area during graphitization process in the Castner furnace.