FACILITY AND METHOD FOR OPERATION OF ARC FURNACE Russian patent published in 2009 - IPC F27B3/08 H05B7/148 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy field and can be used for operation of arc furnace, containing at least one electrode. In the method it is implemented tapping stage, at that at least to one electrode during the time being in switched on condition (t'₃, t'_f, t"_f) it is input energy, and during the time being in off mode (t'₀₃, t'₀₄> t"₀₄) the energy is not input. Herewith the beginning of tapping stage (T'_TO) fall on the least being time on state (t'_f, t"_f). Herewith to at least one electrode energy at least from time to time is input also during the tapping stage. Adjusting device contains model for energy balance and mass and is implemented with ability of regulation of electrode position and input of energy to it. Invention provides tapping to start earlier than at usual running regime of arc furnace that leads to considerable advantage by time, reduction of energy consumption and electrodes, and also of more efficiency. Preliminary calculation of changing the energy content of melt material during the time of tapping stage provides desirable energy content of raw steel and counteracts the risk of its overheating.

EFFECT: receiving of ability tapering to start earlier, than at usual running regime of arc furnace that leads to considerable advantage by time, reduction of energy consumption and electrodes, and also of more efficiency.

16 cl, 3 dwg