Metallurgical lance and apparatus

Details Metallurgical lance and apparatus Metallurgical lance and apparatus

C - Chemistry, Metallurgy

21

C

C21C 5/46 (2006.01)

Patent

CA 2413153

R metallurgical lance for introducing gas from above into a volume of metal in a vessel has a head 12. The head 12 has at least one ejector 20 formed therein. The ejector 20 comprises a Laval nozzle 24 surrounded by a shrouding gas passage 30. Both the Laval nozzle 24 and the shrouding gas passage 30 communicate at their proximal ends with a common gas supply chamber 22. The shrouding gas passage 30 communicates with the chamber 22 via a first annular orifice member 38 which determines the percentage split of the gas flow through the chamber between the Laval nozzle 24 and the shrouding gas passage 30.

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