DEVICE FOR INJECTING PREHEATED AIR INTO A SHAFT FURNACE

摘要

The device comprises an oblique portion connected by a gooseneck, a nozzle, a tuyere and a ball-and-socket joint to the wall of the furnace, in which the oblique portion comprises a tapered tube flange-mounted by its upper part onto an upper connection piece forming part of a bustle pipe and the lower part of which dips axially into a lower connection piece integral with the gooseneck, a bellows expansion joint and tension rods ensuring the mechanical connection between the tapered tube and the lower connection piece. The lower connectio n piece and the tapered tube can move mutually in the axial direction and have means for limiting their radial mobility.