Mixing chamber

A mixing chamber for mixing hot blast exiting from a hot blast stove with cold blast from a supply thereof to produce a uniform temperature blast mixture adapted to be introduced into a blast furnace comprising,

• (a) an open ended tubular member defining openings at opposite ends thereof, one of said openings being an entry into the tubular member and the other being an exit therefrom, said entry being adapted to have introduced therein said hot blast exiting from a hot blast stove, said exit being adapted to communicate with said blast furnace,
• (b) said tubular member including a tubular peripheral wall having a pair of circumferentially spaced passageways therethrough substantially diametrically opposite to each other and of substantially oval cross section,
• (c) each of said passageways being oriented tangentially to the inner surface of said peripheral wall,
• (d) conduit means, defined by a pair of jackets generally concentric with said tubular wall, in fluid communication with said passageways, respectively, for introducing cold blast therein from a cold blast supply,
• (e) whereby the incoming cold blast has imparted thereto a swirling motion for thorough mixing thereof with the hot blast entering said tubular member through said entry thereto to produce a uniform temperature blast mixture adapted to pass through said exit opening on its way to said blast furnace.