FIELD: mechanical engineering; furnaces. SUBSTANCE: secondary air delivering nozzle has rectangular-section housing formed by four walls arranged in pairs opposite to each other and called first walls and second walls. Housing can be turned by drive around axis called axis of rotation and passing through indicated first walls. Housing is made opened from two opposite sides one of which serves for taking air in, and the other, for discharge air into furnace. Set of shutters arranged square to second walls is located inside housing. Each shutter can be turned by driven around corresponding axle square to axis of rotation and intersecting the latter. EFFECT: provision of control of temperature in furnace space owing to regulation of vertical and horizontal orientation of secondary air jets by tensioning or pushing the rod and sliding of drive shaft. 5 cl, 7 dwg
