Aluminium Pechiney

Bernard Boffa

Christian Dreyer

The invention concerns an improvement in a suction or blowing pipe for a furnace having partition chambers intended for the firing of carbonaceous blocks. The pipe comprises a main body (3) provided with a plurality of nozzles (10) to which tubular nipples (2) are connected in a number equal to the number or partitions (5) forming the chambers of the furnace. Each of the nipples is connected to a transverse furnace wall (9) or a partition (5) by a taphole (8) disposed in the upper part of the wall or partition. The improvement comprises forming each nipple by at least two tubular elements disposed in series, a first element (15) provided in its upper part (15A) with a first flat flange (18) adapted to cooperate in jointed relationship and in respect of rotation with a flat flange (19) located in the lower part of a nozzle (10), and in its lower part (15C) with a second flat flange (27) which is parallel to the first flat flange (18), and a second element (16) provided in its upper part (16A) with a third flat flange (26) which cooperates in jointed relationship and in respect of rotation with the second flange (27). The first and second elements have over at least part of their height an axis inclined by an angle .alpha. with respect to the axis 23 which is perpendicular to the plane of the flanges.

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Lannemezan, France

Bernard Boffa