Three-phase universal electromagnetic technological reactor for mineral substances processing
This paper presents advantages of application electromagnetic technological reactor for mineral substance melting. Thermodynamic calculations of the process of heating and melting mineral substances in a wide temperature range (300-2000 K) were performed. For processing in electromagnetic reactor a following materials were used: basalt rock from Aktobe field to obtain a mineral fiber from melt ( heat-insulating material ), chrome production waste - monochromatic sludge to convert toxic hexavalent chromium to trivalent and dust after gas cleaning at chromium production to reduce carbon chromium oxides, contained in Shubarkol bituminous coal. Calculations have shown that in studied temperature range, a toxic hexavalent chromium is completely transferred into a safe trivalent chromium with concentration of about 6 wt.%. The gas phase does not contain harmful components and represented mainly by water steam, carbon dioxide, nitrogen and hydrogen. For various technological mixtures, a specific energy consumption for heating and melting process changes from 0.6 up to 0.9 kWh/kg. In experiments, an average specific energy consumptions for obtaining a melt of studied mineral substances in EMR was 1 kWh/kg. Results of thermodynamic calculations and experiments confirm the possibility of application TERRA software for calculation of mineral substances heating and melting process in EMR and for determining an initial data for its design. Fulfilled studies have shown a high efficiency of mineral substances melting in EMR. A relatively low specific energy consumption for melting and melt jet production favorably distinguish technology EMR from the known melting technologies of mineral materials, including technological mixtures containing basalt, chrome production wastes and solid fuels.