In situ furnace metal desulfurization/nodularization by high pur

Details In situ furnace metal desulfurization/nodularization by high pur In situ furnace metal desulfurization/nodularization by high pur

1977-12-02

1981-01-20

Spruill, R. L.

Metal founding

Process

Shaping liquid metal against a forming surface

164 57, 75130A, 75130B, B22D 2720, C22C 3310

Patent

active

042456916

ABSTRACT:
A method of desulfurizing iron in an induction furnace is disclosed. High purity magnesium, carried in a lance controlled cartridge, is plunged into the lower zone of a molten metal pool of an induction furnace; the cartridge is held submerged for a period of 30-200 seconds. The molten metal column above the submerged cartridge must be at least 2.5 feet, preferably 6-7 feet. The molten metal temperature at the time of cartridge plunging is limited to 2400.degree. F. or less. Magnesium recovery will be at least 70%, which is better than other prior art methods by a factor of 1.4.

REFERENCES:
patent: 2776206 (1957-01-01), Klingbeil
patent: 2809886 (1957-10-01), Klingbeil
patent: 2872179 (1959-02-01), Fisher
patent: 3030205 (1962-04-01), Millis
patent: 3598575 (1971-08-01), Jarysta
patent: 3764305 (1973-10-01), Andersson
patent: 3765876 (1973-10-01), Moore
patent: 3819365 (1974-06-01), McCaulay et al.
patent: 3854939 (1974-12-01), Mezoff
patent: 4004630 (1977-01-01), Dunks

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