Nozzle for fuel and oxygen lance assembly

Claim 1

For a lance adapted for mixing oxygen and fuel and including, a first central fuel pipe, a second pipe concentric with said first pipe and providing an insulating space around said fuel pipe, a third pipe concentric with and providing an oxygen conveying space around said second pipe, fourth and fifth pipes concentric with each other and said other pipes providing concentric coolant circulating spaces; a nozzle head, a first lower closure wall connected at its peripheral edge to said fifth pipe, at least one cylindrical passage means opening outwardly of said first closure wall to provide an oxygen and fuel discharge orifice, an extension of said fourth pipe providing at a lower portion of said nozzle head a coolant chamber surrounding said cylindrical passage and communicating with said coolant circulating spaces, a second closure wall on said third pipe above said first closure wall, a third closure wall on said second pipe enclosing said insulating space and being disposed above said second closure wall, a fourth closure wall on said first pipe disposed above said third closure wall, and a tube connected to said fourth closure wall and communicating with said first fuel pipe, said tube being connected to and extending through said third closure wall, and said tube having a discharge end .[.terminating.]. within said cylindrical passage. .[.in spaced relation relative to said oxygen and fuel discharge orifice.].