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US 4,200,452 AGranted
Method for the refining of iron-based melts
AssigneeDSO "Cherna Metalurgia"
InventorsPeter H. Savov, Vassil G. Peev, Alexander Y. Valchev, Nikola A. Lingorski
Life of this patent
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Abstract
A method of and an apparatus for the refining of a ferrous melt makes use of a ladle with a removable cover provided with a porous plug at its bottom through which an inert gas is introduced. A direct current source is connected to a carbon electrode in contact with the melt and at least one electrode above the melt.
Claims3
A method of refining a ferrous melt, comprising the steps of:
- (a) introducing the ferrous melt into a ladle;
- (b) applying and sealing a cover to said ladle;
- (c) introducing a stirring gas into the melt in said ladle through a porous plug in the base of said ladle;
- (d) heating the melt in said ladle by passing a direct electric current through said melt between two electrodes in contact therewith and by additionally generating an arc with direct current between another electrode spaced from above the melt;
- and
- (e) introducing a gas into said melt through at least one of said electrodes.
3 more elements
Dependencies are inferred from the claim text.