Nozzle for continuous casting
AssigneeDanieli & C. Officine Meccaniche SpA
InventorsNuredin Kapaj, Milorad Pavlicevic, Alfredo Poloni, Fabio Vecchiet
Life of this patent
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Abstract
A particular arrangement and conformation of the discharge openings and channels of a continuous-casting nozzle, together with a specific external profile of the body of the nozzle itselfs, enable slabs of any thickness, in particular from medium to thin ones, to be cast, which have excellent surface quality and are practically free from inclusions and blowholes.
Claims18
A nozzle for continuously feeding liquid metal into a crystallizer for continuous casting of slabs preferably of medium to small thickness, said nozzle being made up of a refractory elongated tubular body 11 having a first top part 11a having a roughly circular cross section and a second bottom part 11b, radiused to the first part, having a roughly flattened section provided at its bottom with lateral discharging holes 13a, 13b, said second part further having, in the bottom end part, beneath said discharging holes, a closing wall 12, either flat or provided with a cusp 24 facing the inside of the nozzle, each of said holes, set facing one another, giving out respectively into a laterally elongated chamber 14a, 14b, in turn provided with channels for enabling passage of liquid metal from the nozzle itself towards the inside of the crystallizer;
- characterised in that each of said elongated chambers 14a, 14b is equipped with at least three discharging doors 20, 21, 22 designed to divide and distribute the jet of molten metal according to at least three preferential directions 15, 16, 17 on each side of the nozzle, by means of respective deflecting elements 18, 19.
Dependencies are inferred from the claim text.