Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1983-08-15
1984-09-18
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 59, C21C 700
Patent
active
044721951
ABSTRACT:
The present invention relates to either a batch or continuous process for decarburization of metals and metal alloys. A shallow melt of metal or metal alloy having a depth of between about 2 in. to about 24 in. is provided. The carbon content of the melt is reduced from its initial value to a range of about 0.3 to 0.1 wt. % carbon. To accomplish this reduction, an oxygen enriched gas is blown onto the surface of the melt at a velocity of about 10 to about 50% of supersonic velocity so as to decarburize the melt without creating any substantial splashing of the melt. At the same time, the melt is stirred by injecting an inert gas below the melt surface. Subsequently, the carbon content of the melt is further reduced from the carbon percentage achieved in the first reduction to a value of not less than about 0.001 wt. % carbon. This latter step is accomplished by injecting a gas mixture comprising an oxygen enriched gas and an inert gas having a ratio of between about 4:1 oxygen enriched gas to inert gas to about 1:10 oxygen enriched gas to inert gas below the surface of the melt for both decarburizing and stirring the melt.
REFERENCES:
patent: 2962277 (1960-11-01), Morrill
patent: 3046107 (1962-07-01), Nelson
patent: 3252790 (1966-05-01), Krivsky
patent: 3396011 (1968-08-01), Trentini
patent: 3754892 (1973-08-01), Ando
patent: 3953199 (1976-04-01), Michaelis
patent: 4178173 (1979-12-01), Gorges
patent: 4356035 (1982-10-01), Brotzmann
Irving, "The LBE Process Takes Hold Worldwide," Iron Age, pp. MP-26 and MP-29, (12/6/82).
Ishida, "Some Improvements for the Refractory Performance of 20 Ton AOD Vessel in Last 3 Years," 3rd Int'l Iron & Steel Congress, pp. 150-157, (1978).
Krivsky, "Linde Ar-Oxygen Process for Stainless Steel," Metallurgical Transactions, pp. 1439-1447, (1973).
McManus, "Bottom Stirring Makes its North American Debut," Iron Age, pp. MP-13, MP-15 and MP-18, (5/3/1982).
Gupta Debabrata
Yarwood John C.
Cohn Howard M.
Kelmachter Barry L.
Olin Corporation
Rosenberg Peter D.
Weinstein Paul
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