Refining of ferrochromium metal

Details Refining of ferrochromium metal Refining of ferrochromium metal

1982-10-18

1984-01-17

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 12, 751305, C22B 400

Patent

active

044262230

ABSTRACT:
A process for the refining of high carbon ferrochromium metal in which the ferrochromium metal is refined, in the liquid state, with liquid metal oxide, generally including oxide fines. The heating is carried out in a transferred arc thermal plasma with substantial exclusion of carbon; although a consumable carbon electrode can be employed to generate the plasma. The ferrochromium metal is preferably premixed with the required oxides and fluxes and the feed is added to the furnace bath at a rate controlled to ensure that the slag and metal remain molten and at a chosen temperature.

REFERENCES:
patent: 789093 (1958-01-01), Stevens
patent: 1465576 (1977-02-01), Hancock
patent: 2776882 (1957-01-01), Chadwick
patent: 2845342 (1958-07-01), Udy
patent: 3615349 (1971-10-01), Bleloch
patent: 3779740 (1973-12-01), Adachi et al.
Journal of Metals, "In-Flight Plasma Reduction of Domestic Chromite" (Aug. 1981), pp. 43-49, (By: J. J. Moore, K. J. Reid, J. K. Tylko).
Chemical Engineering, "Plasma Process is Ready for Metals Recovery" (Feb. 26, 1979), pp. 75-77, (By: Peter R. Savage).

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