METHOD OF SMELTING IN DC ARC FURNACE Russian patent published in 2014 - IPC F27B3/08 C22B9/20 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises charging the initial material into furnace and switching on of power supply to feed current through graphitised electrode and metal melt formed by electric arc via at least one closed electric circuit. Electromagnetic field is excited in said melt to mix it. At the start of electrosmelting, after switching of power supply, current density nearby graphitised electrode working end is set equal to 24 A/cm², not over. Then, at steady current density, electric arc pressure to metal melt is increased by arc length variation and arc pressure increase is terminated at forming of recess with metal wavy displacement therefrom at metal surface. Now, at steady conditions, electrosmelting is executed at control and maintenance of steady current density and arc length to maintain required pressure to metal melt surface.

EFFECT: higher efficiency and quality of smelting.

1 ex