Apparatus for delivering a fluid into a furnace

Claim 1

A LANCE FOR FEEDING OXYGEN TO THE MOLTEN BATH OF METAL IN A METALLURGICAL FURNACE COMPRISING: (A) FIRST, SECOND, AND THIRD CONCENTRIC SPACED APART TUBULAR MEMBERS WITH THE INNERMOST FIRST TUBULAR MEMBER BEING ADAPTED TO FEED THE OXYGEN INTO SAID FURNACE; (B) A COLLAR MEMBER FIXED TO THE FIRST AND TO THE INTERMEDIARY SECOND TUBULAR MEMBERS ADJACENT ONE PAIR OF ENDS WHEREBY ONE END OF A FIRST ANNULAR SPACE BETWSEEN SAID FIRST AND SECOND TUBULAR MEMBERS IS CLOSED; (C) MEANS CONNECTING THE OTHER END OF THE FIRST TUBULAR MEMBER AND THE ADJACENT END OF THE OUTERMOST THIRD TUBULAR MEMBER WHEREBY ONE END OF A SECOND ANNULAR SPACE BETWEEN SAID FIRST AND THIRD TUBULAR MEMBERS IS CLOSED; (D) FLEXIBLE MEANS CONNECTING THE FREE END OF SAID THIRD TUBULAR MEMBER AND SAID COLLAR WHEREBY THE OTHER END OF THE SECOND ANNULAR SPACE IS CLOSED AND WHEREBY SAID THIRD TUBULAR MEMBER CAN EXPAND WHEN HEATED RELATIVE TO SAID FIRST AND SECOND TUBULAR MEMBERS; (E) MEANS TO FLOW COOLING LIQUID INTO SAID FIRST ANNULAR SPACE ADJACENT ITS CLOSED END WHEREBY SAID LIQUID COURSES SAID FIRST ANNULAR SPACE LONGITUDINALLY AND COURSES A THIRD ANNULAR SPACE BETWEEN SAID SECOND AND THIRD TUBULAR MEMBERS; AND (F) MEANS TO CONDUIT SAID LIQUID FROM SAID THIRD ANNULAR SPACE.