Patent ID: 8920711

Claim:
A lance for feeding an additive wire into a quantity of molten metal below the surface of the molten metal, the lance comprising: a lance inlet for receiving additive wire and a lance outlet for dispensing additive wire to the molten metal; a first exterior sleeve comprising a cellulosic material, the first exterior sleeve having a passage and an inner surface along the passage extending from an exterior sleeve inlet of the first exterior sleeve to an exterior sleeve outlet of the first exterior sleeve; a first interior sleeve which comprises refractory material on the inner surface of the first exterior sleeve extending from a first end of the first interior sleeve at which the additive wire is dispensed to the molten metal by the first interior sleeve to a second end of the first interior sleeve which receives the additive wire, the second end of the first interior sleeve being located at a distance from the lance inlet; and an outer inlet sleeve extending along a portion of the passage of the first exterior sleeve and extending from the second end of the first interior sleeve to the lance inlet, the outer inlet sleeve having an inner surface extending along a passage in the outer inlet sleeve, an inner inlet sleeve provided along the inner surface of the outer inlet sleeve and extending from the second end of the first interior sleeve to the lance inlet.