Techint Compagnia Tecnica Internazionale S.p.a.

Techint Compagnia Tenica Internazionale S.p.a.

Marcello Pozzi

Francesco Memoli

Enrico Malfa

Loredana Di Sante

Mauro Bianchi Ferri

Carlo Raggio

A multifunction injector () comprising a De Laval nozzle () adapted to act as a burner at subsonic or supersonic speed, combined with a plurality of nozzles () for fuel and comburant respectively, arranged in two rings, concentric and co-axial to said De Laval nozzle () and externally protected by a specifically shaped protection cavity ().

Multifunction injector and relative combustion process for metallurgical treatment in an electric arc furnace

A pyrometallurgic process for the treatment of post-steelwork residues, comprises the following phases: preparing a furnace () of the electric type, suitable for the introduction of the residues; preparing the residues, for example in a hopper with the possibility of mixing with additives and reaction elements; introducing the residues, together with suitable additives and chemical reagents, into the furnace (); introducing directly into the slag, by means of lances (), additives, flushing and reaction elements to correct the composition of the slag (); reacting the residues with the slag () to obtain: a) separation of the liquid metallic phases which are added to the metal bath () to form a sellable liquid metal; b) separation of the metallic volatile elements in vapour phase which, when transferred to the free zone of the furnace () recombine with the oxygen for the formation of oxides and consequently of powder.

Pyrometallurgic process for the treatment of steelwork residues

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Santa Maria Hoe' Lecco, Italy

Marcello Pozzi