Oxygen injection lance

Claim 1

AN OXYGEN LANCE COMPRISING A NOZZLE HEAD THAT PROJECTS DOWN INTO THE FURNACE, THREE CONCENTRIC TUBES JOINED TO THE NOZZLE HEAD AND RUNNING UP TO A MOUNTING ASSEMBLY, SAID MOUNTING ASSEMBLY COMPRISING A CASTING CORED AND TAPPED TO PROVIDE SEPARATED ENTRANCES FOR OXYGEN AND WATER AND AN EXIT FOR RETURN WATER, THE FACE OF SAID CASTING BEING MACHINED FOR UNION WITH A FACE PLATE, SAID FACE-MACHINED SURFACE BEINAG CUT WITH A CONTINUOUS CIRCULAR GROOVE TO RECEIVE AN O-RING TO ASSURE SEAL WITH SAID FACE PLATE, SAID MOUNTING ASSEMBLY CORED THROUGHOUT TO PROVIDE FOR THROUGH PASSAGE OF THE CENTRAL TUBE OF SAID CONCENTRIC TUBES, SAID CORING BEING MACHINED AT THE UPPER END TO PROVIDE A SMOOTH-WALL CYLINDRICAL BORE, SAID CENTRAL TUBE BEING FITTED WITH A METAL, ELONGATED RING HAVING GROOVES AROUND ITS EXTERIOR SURFACE THAT RECEIVE O-RINGS THAT EFFECT A SEAL WITH SAID SMOOTH-WALL CYLINDRICAL BORE OF SAID MOUNTING ASSEMBLY WHILE PERMITTING LINEAR DISPLACEMENT OF SAID CENTRAL TUBE RELATIVE TO SAID MOUNTING ASSEMBLY, SAID MOUNTING ASSEMBLY HAVING A PROJECTED LOWER CYLINDRICAL EXTENSION ALSO HAVING GROOVES AROUND IT TO RECEIVE O-RINGS THAT EFFECT A SEAL AGAINST THE INTERIOR SURFACE OF A CYLINDRICAL FITTING THAT IS JOINED TO THE INTERMEDIATE TUBE OF SAID CONCENTRIC TUBES, SAID SEAL PERMITTING LINEAR DISPLACEMENT OF SAID CYLINDRICAL FITTING AND INTERMEDIATE TUBE RELATIVE TO SAID MOUNTING ASSEMBLY, SAID NOZZLE HEAD CORED TO RECEIVE COOLANT WATER FROM SAID CENTRAL TUBE OF SAID CONCENTRIC TUBES AND PASSAGEWAYS TO COMMUNICATE SAID COOLANT WATER TO THE ANNULAR SPACE BETWEEN SAID INTERMEDIATE TUBE AND THE EXTERNAL TUBE OF SAID CONCENTRIC TUBES, WITHOUT LEAKS OF SAID COOLANT WATER TO OTHER PASSAGEWAYS PROVIDED FOR SAID OXYGEN, SAID OXYGEN PASSAGEWAYS RECEIVING SAID OXYGEN FROM THE ANNULAR SPACE BETWEEN SAID CENTRAL TUBE AND SAID INTERMEDIATE TUBE AND CARRYING SAID OXYGEN DOWN THROUGH SAID NOZZLE THROUGH A PLURALITY OF EXIT JETS, SAID EXIT JETS DIVERGING FROM EACH OTHER, THE ANGLE OF DIVERGENCE FROM THE LONGITUDINAL AXIS OF SAID NOZZLE BEING AT LEAST 15*, THUS PROVIDING A LARGE