Inducing swirl in a gas flow

摘要

P233 - Convention An apparatus for injecting gas into a metallurgical vessel supporting a metallurgical process is 5 disclosed. The apparatus comprises a gas flow duct, an elongate central structure extending within the gas flow duct, and a plurality of flow directing swirl vanes disposed about the central tubular structure adjacent the forward end of the duct. The flow directing vanes are 10 formed with internal water flow passages for flow of cooling water internally along each vane and the elongate central structure is formed with a cooling water supply passage for supply of cooling water to the internal water flow passages in the vanes and a water return passage for 15 outflow of cooling water which has passed through the internal water flow passages in the vanes. N:/Melbourne/Cases/Patent/62000-62999/P62553.AU/Specis/TRPL P233 complete.doc 14/12/07 I)Y C',) (0 U) 0 CY) U,.