Patent ID: 8221677
Filing Date: 2012-07-17
Classification: B22D,C21C,F27D

Abstract:
1. A wire injection lance apparatus for treating a molten metal product using an additive wire, the wire injection lance apparatus comprising: a wire feeding mechanism for conveying the wire to a lance wherein the lance feeds the wire into a quantity of the molten metal below the surface of the molten metal; the lance comprising: a refractory casing having an outlet; a conduit located within the refractory casing providing a passage for conveying the wire to the outlet; and a lance nozzle insert provided within the refractory casing in communication with the conduit and forming the outlet, wherein the lance nozzle insert is made from material comprising 60 to 85 wt. percent stabilized zirconium oxide having a particle size distribution of less than 325 mesh and 10 to 36 wt. percent graphite and 4.0 to 15 wt. percent of a thermosetting resin binder.