Patent ID: 8889060

Claim:
A device for regulating a temperature of a gas in a hot gas main for feeding hot gas to a blast furnace, said device comprising: a mixing pot with a chamber, an inlet port for receiving hot gas, an inlet port for receiving cold gas an outlet port for evacuating mixed gas; a regulation system for controlling an amount of cold gas fed to the chamber; wherein said mixing pot comprises a housing with a first mixing chamber and a second mixing chamber defined therein, said first and second mixing chambers being in fluid communication with each other by means of a Venturi restriction; a first inlet port in said first mixing chamber for feeding hot gas into said first mixing chamber; a second inlet port with said first mixing chamber for feeding cold gas into said first mixing chamber; a third inlet port in said second mixing chamber for feeding cold gas into said second mixing chamber; a first outlet port in said first mixing chamber for feeding a first stream of mixed gas from said first mixing chamber to a first gas distribution system for feeding said first stream of mixed gas to said blast furnace at a first level; and a second outlet port in said second mixing chamber for feeding a second stream of mixed gas from said second mixing chamber to a second gas distribution system for feeding said second stream of mixed gas to said blast furnace at a second level, wherein said first stream of mixed gas has a temperature different from a temperature of said second stream of mixed gas.