METHOD FOR CONVERTING MODE OF OPERATING FURNACE AT MELTING OF SILICEOUS FERROALLOYS FROM CARBORUNDUM METHOD TO NON-CARBORUNDUM ONE Russian patent published in 2014 - IPC C22C33/04 

FIELD: metallurgy.

SUBSTANCE: method involves control of charge, electric and electrode modes of its operation by changing the amount of carbon in charge. The following operations are performed simultaneously: burning-out of bottom skull by submersion into a bath of a furnace of electrodes with working melting pots to near-bottom space at reduction of supply of excess carbon to charge till its stoichiometric amount is achieved and charge electric conductivity is eliminated at buildup of arc electric conductivity up to 100%, and metal is tapped from the furnace at simultaneous control of all the above modes.

EFFECT: invention allows completely cleaning bottom skull from a furnace bath and preventing deposition of carborundum structures in the charge.

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