초록 ▼

Device and relative method to inject technological gases and solid material in powder form, in a furnace used in steel and metallurgical melting processes, comprising an emission element including an outlet mouth arranged at a certain distance from the liquid bath, said emission element being innerl

Device and relative method to inject technological gases and solid material in powder form, in a furnace used in steel and metallurgical melting processes, comprising an emission element including an outlet mouth arranged at a certain distance from the liquid bath, said emission element being innerly shaped as a double nozzle, respectively first and second, the first nozzle having a convergent/divergent conformation defined by a neck and being predisposed for the emission of a jet of gas at supersonic speed, said second nozzle having at the end a conformation convergent towards the axis of the emission element and being pre-disposed, according to the step of the melting process in progress, for the emission of a jet at subsonic speed either of technological gases alone, such as for example oxygen, or of solid material in powder form on a gassy vehicle, or of liquid in atomized form.

대표청구항 ▼

[ What is claimed is:] [1.]1. A device to inject at least one gas selected from the group consisting of oxygen, gases containing oxygen, and other technological gases and a solid material in powder form, in a furnace used in steel and metallurgical melting processes for forming a liquid metal bath,

[ What is claimed is:] [1.]1. A device to inject at least one gas selected from the group consisting of oxygen, gases containing oxygen, and other technological gases and a solid material in powder form, in a furnace used in steel and metallurgical melting processes for forming a liquid metal bath, comprising:a body suitable to be mounted fixed in an aperture made on the wall of the furnace, an emission element being housed at an end of said body, said emission element including an outlet mouth for being arranged, in an operating position, at a certain distance from an upper level of the liquid bath, said emission element having a longitudinal axis, and said body having an outer containing shell inside which are defined circulation channels for a cooling fluid,a radially inner portion of said emission element being shaped as a double nozzle, respectively a first inner nozzle and a second nozzle, said second nozzle being annularly outside said first nozzle and substantially co-axial with said first nozzle,the first nozzle having a first terminal section and a convergent/divergent conformation defined by a neck located at a position upstream of the first terminal section and being predisposed for the emission of a jet of gas at supersonic speed,wherein said second nozzle has a second terminal section having a downstream end, and the downstream end has a conformation convergent towards the longitudinal axis of the emission element and is pre-disposed for the emission of a jet at subsonic speed of a member of the group consisting of oxygen alone, gases containing oxygen, other technological gases, solid material in powder form carried by a carrier gas, and liquid in atomized form.