FIELD: high-temperature furnaces such as those used to produce hydrocarbons at steam cracking. SUBSTANCE: premixing burner has tube mounted in its housing and provided with nose on its end arranged at first hole within combustion region of furnace, as well as gas nozzle and primary air chamber located at tube inlet, and at least one air admission port not participating in combustion. In addition, burner has at least one pipe connection for furnace gas one of whose ends is connected to second hole of furnace while its other end is connected to primary air chamber. Air port is located near furnace-gas pipe connection. EFFECT: improved design. 5 cl, 10 dwg
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