BOTTOM ELECTRODE FOR ELECTRIC FURNACE Russian patent published in 2006 - IPC H05B7/06 F27B3/10 

FIELD: electrothermics, in particular, engineering of smelting furnaces, in which metal is smelted in tub lined with fire-resistant non electro-conductive materials, through bottom of which tub, for injecting current into metal, one or several bottom electrodes are passed.

SUBSTANCE: bottom electrode contains copper gas-cooled rod with cooling channels and current feeders and a steel head, lower part of which is made in form of cylinder with hollow, internal side surface of which is rigidly connected with copper rod, a part of which is positioned inside aforementioned hollow. External part of steel cylinder is welded to ribs of steel sheets, positioned along steel cylinder and protruding beyond the boundary of steel cylinder and copper rod. Cooling channels and current feeders are positioned on the end of copper rod, opposite to steel head, while cylinder and copper rod are connected to one another by steel pins with thread, one end of which is held in threaded sockets, made in the body of copper rod, while second ends are welded to ribs of steel sheets, adjacent to steel cylinder, while between steel sheets in the body of steel cylinder and copper rod additional rows of copper pins are positioned.

EFFECT: reliable organization of current and heat transfers.

1 cl, 2 dwg