Oxygen injection lance

Details Oxygen injection lance Oxygen injection lance

C - Chemistry, Metallurgy

21

C

39/105

C21C 5/46 (2006.01)

Patent

CA 1338688

An oxygen blowing lance for refining of a molten metal in a metallurgical vessel comprises an inner oxygen conveying tube having, in the direction of the gas flow, a converging portion, a throat portion at the outlet of the converging portion and a substantially cylindrical portion at the outlet of the throat portion, and a throttle member movable along the axis of the oxygen converging tube. The throttle member has a substantially cylindrical throttle portion and a nose portion extending axially downstream of the throttle portion to a sharp nose tip, the nose portion having a curved profile designed so as to provide in the cylindrical portion of the inner oxygen conveying tube a progressive supersonic expansion of the gas with a minimum turbulence.

609696

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