Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1980-12-31
1982-04-13
Rosenberg, P. D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 59, 751305, C21C 700
Patent
active
043245846
ABSTRACT:
A process is disclosed for the decarburization of a molten bath of chromium-containing pig iron which, in a single operation, permits decarburization by means of an oxygen jet and thus permits chromium or nickel chromium steels to be obtained directly, the decarburization of which can readily be completed by a final treatment under vacuum carried out immediately after the injection of oxygen. The process comprises adjusting the temperature conditions of the pig iron bath and regulating the oxygen jet distance from the surface of the bath and speed of oxygen gas so that the impact force of the oxygen creates a gas-metal emulsion within which the carbon contained in the pig iron is oxidized directly by the oxygen. The carbon content is thus rapidly reduced to less than 0.3% whereas the yield of chromium is higher than 97%. The process is suitable for the preparation of all grades of Cr and NiCr stainless steel, which optionally contain additions of Co, Mn or Mo.
REFERENCES:
patent: 3575696 (1971-04-01), Rehmus
patent: 3793002 (1974-01-01), Borgnat
patent: 3861905 (1975-01-01), Steinmetz
patent: 3992194 (1976-11-01), Leroy
Rosenberg P. D.
Ugine Aciers
LandOfFree
Process for the decarburization of chromium-containing pig iron does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the decarburization of chromium-containing pig iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the decarburization of chromium-containing pig iron will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1416203