In situ furnace metal desulfurization/nodularization by high...

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

C - Chemistry, Metallurgy

21

C

53/105

C21C 1/02 (2006.01) C21B 11/10 (2006.01) C21C 7/064 (2006.01)

Patent

CA 1116865

IN SITU FURNACE METAL DESULFURIZATION/ NODULARIZATION BY HIGH PURITY MAGNESIUM ABSTRACT OF THE DISCLOSURE 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°F or less. Magnesium recovery will be at least 70%, which is better than other prior art methods by a factor of 1.4.

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