VACUUM CHAMBER LINING HEATING BURNER Russian patent published in 2000 - IPC

FIELD: metallurgy; vacuum chamber heating facilities. SUBSTANCE: gas-air- oxygen burner used for heating vacuum chamber is driven into immersible branch pipes of vacuum chamber between vacuum treatment operations. Burner has gas nozzle, injection mixer and tip with burner stone. It has also additional air and oxygen nozzles. Air nozzle is installed coaxially before tip with burner stone, and oxygen nozzle is installed on air duct before air nozzle. Lined cover pointed with its lining to vacuum chamber is installed before burner which is made for displacement. At diameter "d" of injection mixer, diameters of gas, air and oxygen nozzles are made equal to 0.1-0.2d, 0.1-0.3d, 0.05-0.15d, respectively. EFFECT: provision of high-temperature heating of chamber lining before vacuum treatment of metal. 2 cl, 2 dwg