Patent ID: 7140521

Claim:
A nozzle for continuously feeding liquid metal into a crystallizer for continuous casting of slabs, the nozzle comprising: a refractory elongated tubular body having: a first top part having a substantially circular cross section; and a second bottom part, radiused to the first top part, having: a substantially flattened section provided at a bottom portion thereof with lateral discharging holes; and a closing wall in a bottom end part thereof beneath the discharging holes, having a shaped selected from the group of flat and cusp-shaped facing the inside of the nozzle, wherein each of the discharge holes is set facing one another, opening out respectively into a laterally elongated chamber, in turn provided with channels for enabling passage of the liquid metal from the nozzle itself towards the inside of the crystallizer; and deflecting elements, wherein each of the elongated chambers is equipped with at least three discharging doors designed to divide and distribute a jet of liquid metal according to at least three preferential directions on each side of the nozzle, by the respective deflecting elements; wherein two of the discharging doors on each side of the nozzle face upwards; and wherein at least one of the upwardly facing discharging doors on each side of the nozzle has the shape of a duct with a cross-section which increases from the inside outwards, with a longitudinal axis upwardly diverging by an angle β 1 between about 10° and about 80°, with respect to a longitudinal axis of the elongated tubular body.