PLASMA-ARC STEEL MELTING FURNACE OF DIRECT CURRENT Russian patent published in 2011 - IPC F27B3/08 

FIELD: metallurgy.

SUBSTANCE: steel melting furnace consists of ceramic crucible with vertical plasmatron installed in roof, of bottom electrode installed axially to vertical plasmatron, and of three wall plasmatrons installed in walls of crucible at angle to horizontal plane of metal surface in bath. Also, wall plasmatrons are erected at angle 15-30° to horizontal plane and simultaneously are turned so, that their lengthwise axes are directed along tangent to circumference passing through their centres of location on surface of the bath of anode spots from arcs of wall plasmatrons. Radius of said circumference is 0.23-0.26 of diametre of metal bath, while distance from section of each wall plasmatron to the anode spot is 0.5-0.6 of bath diametre.

EFFECT: reduced duration of melting steel in furnace.

2 dwg