Metal refining method

Details Metal refining method Metal refining method

C - Chemistry, Metallurgy

21

C

53/93

C21C 7/072 (2006.01) B22D 1/00 (2006.01) C21C 5/48 (2006.01) C22B 9/05 (2006.01)

Patent

CA 1179506

ABSTRACT OF THE DISCLOSURE: A method of refining a metal by blowing a refining gas surrounded by a cooling gas into the melt of the metal to be refined using a concentric multi-tube system nozzle situated beneath the surface of the melt in a refining vessel. The method comprises controlling the flow rate of the cooling gas passing through the passageway for the cooling gas formed between the outermost tube and the adjacent inner tube of the nozzle as defined by the following equation: Image wherein A is the cooling capacity of the cooling gas; B is the flow rate of the cooling gas; .pi.Di is the inside circum- ference of the outermost tube; and T is the wall thickness of the outermost tube.

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