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US 4,210,442 AGranted
Argon in the basic oxygen process to control slopping
AssigneeUnion Carbide Corporation
InventorsJennings B. Lewis, III, Peter P. Kelly
Life of this patent
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Abstract
Slopping of emulsion from the mouth of a basic oxygen refining vessel is prevented during oxygen refining by introducing inert gas into the vessel when slopping is imminent or has begun. The preferred method is to inject argon in admixture with oxygen through the oxygen lance at a flow rate of from 5 to 30 percent of the oxygen flow rate.
Claims6
In a process for refining molten steel contained in a vessel by blowing oxygen into the melt from above the melt surface whereby an emulsion is formed above said surface, the improvement comprising:
- preventing slopping of said emulsion from said vessel by:
- (a) blowing an inert gas into the vessel when slopping is imminent or has begun, at a flow rate sufficient to stop slopping, while continuing to blow with oxygen, and
- (b) ceasing the blow of inert gas into the vessel when slopping has stopped or is no longer imminent.
Dependencies are inferred from the claim text.