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US 4,121,042 AGranted
Composite electrode with non-consumable upper section
AssigneeThe Steel Company of Canada, Limited
InventorOtto E. Prenn
Life of this patent
Estimating the term…
Abstract
This invention provides a composite electrode having a metallic, water cooled upper portion and a consumable lower portion. The portions are secured together, and the upper one includes conduit means within it to permit cooling water or other liquid to move along a path which brings the cooling liquid into intimate contact with substantially all of the inside surface of the outer wall defining the periphery of the upper portion.
Claims6
A composite electrode for electric arc furnaces, comprising:
- an elongated, substantially cylindrical metallic portion having a top end and a bottom end, the portion including an outer wall of substantially uniform section along its length, the outer wall having an outside surface and an inside surface, an inner wall spaced inwardly from the outer wall to define therewith a passage of annular section, a pipe constituting conduit means longitudinally within said metallic portion, the pipe being spaced inwardly from said inner wall and communicating with the bottom of said passage to allow cooling liquid to move within said portion along a path which brings cooling liquid into intimate contact with substantially all of the inside surface of said outer wall, said path having a downward leg and an upward leg, one leg being along said pipe and the other leg being along said passage,
- an elongated consumable portion having a top end and a bottom end,
- and connector means for joining the top end of the consumable portion to the bottom end of the metallic portion.
Dependencies are inferred from the claim text.