Process for adding calcium to a bath of molten ferrous material

Details Process for adding calcium to a bath of molten ferrous material Process for adding calcium to a bath of molten ferrous material

C - Chemistry, Metallurgy

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C

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C21C 7/04 (2006.01) C21C 1/02 (2006.01) C21C 1/10 (2006.01) C21C 7/00 (2006.01) C21C 7/06 (2006.01) C22C 33/04 (2006.01)

Patent

CA 1222375

ABSTRACT A process for adding calcium to a bath of molten ferrous material is disclosed in which a calcium metal- containing wire is fed through a refractory lance into the bath. Recirculatory stirring of the molten ferrous material is accomplished with an inert gas flow through the lance. The calcium-containing wire is fed at such a rate that it substantially bends towards the horizontal direction after it leaves the lance and melting of the calcium in the wire occurs primarily in or directly below a region of downwelling of the molten ferrous material. Suitable wire feeding rates will depend upon the disposition of the lance in the bath and the composition (e.g. clad or unclad) and cross-sectional dimensions of the calcium metal-containing wire.

460721

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