Device for cooling the wall of a metallurgical furnace

LE DISPOSITIF COMPORTE UNE PLAQUE A DEUX COUCHES DONT L'UNE 2 EST A BASSE CONDUCTIBILITE THERMIQUE. AU MOINS DEUX TUBES REFROIDISSEURS METALLIQUES SONT INCORPORES DANS LADITE PLAQUE DE SORTE QU'ILS SONT SEPARES PAR UN INTERVALLE ET QUE L'INTERFACE 5 DES COUCHES 2 ET 3 FORMANT PLAQUE TRAVERSE LA CAVITE DESDITS TUBES DANS LE SENS LONGITUDINAL ET D'UNE MANIERE SENSIBLEMENT PARALLELE AU PLAN DE LA PLAQUE. SELON L'INVENTION, L'INTERFACE 5 DES COUCHES 2 ET 3 FORMANT PLAQUE EST DEPLACEE PAR RAPPORT AU PLAN DIAMETRAL DES TUBES REFROIDISSEURS DU COTE DE LA COUCHE A BASSE CONDUCTIBILITE THERMIQUE 2. The device comprises a two-layer plate, one layer 2 of which has a low thermal conductivity. At least two metal cooling tubes are incorporated into the said plate in such a way that they are separated by a gap and that the interface 5 of the layers 2 and 3 forming a plate traverses the cavity of the said tubes longitudinally and substantially parallel to the plane of the plate. According to the invention, the interface 5 of the layers 2 and 3 forming the plate is displaced relative to the diametral plane of the cooling tubes on the side on which the layer 2 of low thermal conductivity is situated.