PROCEDURE FOR PRODUCTION OF INGOT OF FINE FRACTION FERRO- ALLOYS IN ELECTRIC ARC FURNACE Russian patent published in 2011 - IPC C22C33/04 

FIELD: metallurgy.

SUBSTANCE: procedure consists in loading charge materials into furnace, in their heating and smelting with transmitted electric current. Before melting and connection of a current source an upper movable electrode is transferred to its contact with a lower stationary electrode. Further, charge materials are loaded into furnace, the current source is turned on and electric arc is ignited in a zone of electrode contact. Charge materials are melted forming a zone of melting transferred due to transfer of the movable electrode relative to the stationary electrode. Between them there is produced an ingot which corresponds to continuation of the stationary electrode and a current conductor. The current source is turned off before exit of the movable electrode from the furnace.

EFFECT: reduced energy expenditures and improved operational characteristics.

1 dwg