Method of desulfurizing molten metal in a plasma fired cupola

Details Method of desulfurizing molten metal in a plasma fired cupola Method of desulfurizing molten metal in a plasma fired cupola

1988-06-29

1989-08-01

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

266197, C22B 400

Patent

active

048530336

ABSTRACT:
A method of desulfurizing iron in a plasma fired cupola having a plurality if feed nozzles each of which have a particulate feed and a plasma torch connected thereto; a fluxing agent such as CaO, MgO, CaCO.sub.3, MgCO.sub.3 or CaCO.sub.3 MgCO.sub.3 is fed to the feed nozzle and melted by the plasma torch; the molten fluxing agent mixes directly with the molten iron in the cupola and reacts with the sulfur in the iron; the reacted and unreacted fluxing agent combine with the slag reducing the viscosity making the slag flow better and producing a low sulfur iron in the cupola.

REFERENCES:
patent: 4530101 (1985-07-01), Fey
patent: 4611332 (1986-09-01), Santen
patent: 4687512 (1987-08-01), Schrodter
patent: 4707183 (1987-11-01), Michard
patent: 4769065 (1988-09-01), Dighe
"Plasma-Fired Cupola: An Innovation in Iron Foundry Melting", Dighe et al.
Dighe & Karp, "Test Results on a Pilot-Scale, Plasma-Fired Cupola for Iron Melting", ISPC-7 Eindhoven, pp. 1166-1173, (Jul. 1985).

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