Patent ID: 9335097
Filing Date: 2016-05-10
CPC Classification: C21C,F27B,F27D,H05B,Y02P

Claim Text:
1. An electrode for a direct current electric arc furnace for melting metals, adapted to be housed in a bottom of said furnace, comprising: a bimetallic bar, having an inner profile and defining a longitudinal axis, comprising along the longitudinal extension thereof a first steel portion, a first end of which is adapted to come in contact with a metal bath within the furnace, and a second copper portion welded to a second end of said first steel portion; cooling means having an outer profile which substantially corresponds to the inner profile of the bimetallic bar, the cooling means being configured to cool down said bimetallic bar; a cavity obtained within said second copper portion, in which said cooling means are at least partially housed; a gap between said cavity and said cooling means; wherein the cooling means comprise a collector, the collector being placed at a first end of the cooling means, having an end wall provided with a plurality of channels which put into communication said collector with a first portion of said gap which is proximal to said first steel portion; a first pipe for conveying a cooling liquid towards the collector; wherein the collector has a cross section area of at least 1.5 times the cross section area of the first pipe with respect to said longitudinal axis, and wherein at least some of the channels have a longitudinal axis thereof perpendicular to a plane tangent to the respective outlet section, whereby a plurality of jets of cooling liquid substantially perpendicular to a primary surface of the cavity proximal to said first steel portion is produced in the first portion of the gap.