Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1992-05-04
1993-09-07
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C21C 700
Patent
active
052424847
ABSTRACT:
A plant for secondary metallurgical processing of molten steel, having a melting apparatus and a continuous casting apparatus, a first station and a second station each having an associated evacuatable container for the molten steel, an oxygen feed device and an additive feed device. Each container receives a casting ladle, and has a vacuum-tight cover to provide a seal. A moderate vacuum device, e.g. a water ring pump and a high vacuum device, e.g. a water ring pump and a steam jet are provided, and are connected to the container via a device for selectively connecting the moderate vacuum device and the high vacuum device to the containers. The method for secondary metallurgical processing of steel melts, includes the steps of refining a melt with simultaneous addition of oxygen, boiling out of the melt subsequent to the addition of oxygen, addition of reducing agents to the melt and allowing sufficient processing time for the degassing and desulfurizing of the melt, sequentially subjecting a melt to a moderate intensity vacuum and a high intensity vacuum and correction of the melt analysis and alloying, at least one of the steps being carried out with simultaneous introduction of an inert gas into the melt.
REFERENCES:
patent: 3467167 (1969-09-01), Mahin
Dorpinghaus Jurgen
Scholer Horst Dieter
Schonewolf Georg
Mannesmann Aktiengesellschaft
Rosenberg Peter D.
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