| 摘要 |
A lance (1,101) for blowing fluid-state substances inside furnaces, particularly for steel production. The lance (1,101) comprises an elongated body (2,102) inside which at least two ducts (3,4,103,104,105) are provided which lead outside the body (2,102) proximate to one of its longitudinal ends. These ducts (3,4,103,104,105) can be connected by couplings (5,6,105,106,107) to means for feeding fluid-state substances to be blown inside the furnace, and a chamber for the circulation of a coolant is formed inside the body of the lance (1,101) at least proximate to its end to be inserted in the furnace. |
