Patent ID: 8790570

Claim:
A movable device for injecting oxygen and other technical materials into an electric arc furnace comprising: a housing situated above a portion of a step of a crucible, said step providing a base for said housing and being defined by a refractory material lining said crucible; a cooling coil disposed to provide an outer protection wall of said housing facing an inside of said crucible; an injection lance for injecting oxygen and other technical materials; a supporting and moving system of said lance configured to translate said lance longitudinally between minimum and maximum range points of a liquid bath level contained in said crucible, said supporting and moving system being positioned in said housing, wherein an opening is defined in said housing and in said cooling coil, said opening facing the inside of the crucible, the lance being transferably guided within said opening by said supporting and moving system; and a scraping member disposed at the opening, said scraping member acting on the lance.