Hot-top for the production of ingots using an electroslag remelting process
AssigneeCentro Sperimentale Metallurgico S.p.A.
InventorsAldo Ramacciotti, Eugenio Repetto
Life of this patent
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Abstract
A hot-top for the production of ingots using an electroslag remelting process, comprises a ceramic hot-top having non-consumable electrodes embedded in the radially inner side walls thereof, the exposed surfaces of the electrodes comprising 5 to 50% of the total area of the hot-top inner surface. The electrodes extend parallel to the axis of the hot-top, from the top edge of the hot-top down at least 50% of the height thereof, and may be graphite or hollow water-cooled metal electrodes. In use, the electrodes contact not only the molten metal but also its superposed layer of slag.
Claims8
A hot-top for the production of ingots obtained at least in part by an electroslag remelting process, the hot-top being made of refractory material and having on its inner surface a plurality of non-consumable elongated electrodes partially embedded in said refractory material, said electrodes having exposed parts constituting a plurality of elongated vertical parallel electrically conducting zones that extend from the upper edge of the hot-top downwardly, a consumable electrode having its lower end disposed axially within said hot-top and spaced from the inner side walls of the hot-top, and means for passing an electric current between said consumable and non-consumable electrodes, said consumable electrode being in series with a plurality of said non-consumable electrode, a plurality of said non-consumable electrodes being in parallel with each other.
Dependencies are inferred from the claim text.