Danieli & C. Officine Meccaniche S.p.a.

Other

Matteo Vittorio Losciale

Alfredo Poloni

Milorad Pavlicevic

Gianpietro Benedetti

Gianni Gensini

Angelico Della Negra

Corrado De Cecco

Fulvio Zubini

Iginio Colussi

Vittorino Gallo

Ioannis Giannoulidis

This invention is an electric arc furnace that can be continuously charged with ferrous materials, that can continuously melt the incoming charged materials, and that can semicontinuously tap molten steel by tilting to tap one side of the furnace or another. Continuous melting and refining can occur in lateral shafts adjacent to the central melting zone, and molten steel can be tapped from either of these shafts or directly from the central melting zone if desired. The furnace can be operated and tapped continuously, which provides many distinct advantages over what is currently available in the art.

Electric arc furnace for continuous charging with ferrous materials and semicontinuous tapping of molten steel

Loading system for an electric arc furnace (,) includes a loading station (,), a pre-heating station (,) and a pick-up and moving device (,) provided with an arm (,) rotating on a circumference on which the furnace (,), the loading station (,) and the pre-heating station (,) lie. The loading station (,) being distanced from the pre-heating station (,), the loading element (,) being suitable to be located in or removed from each of the loading (,) and pre-heating (,) stations. The manipulator arm (,) also is suitable to be moved vertically to move the loading element (,) between the loading station (,), the pre-heating station (,) and a position above the furnace (,), in the pre-heating station (,) the container (,) being suitable to cooperate with the air-tight cover (,) and at the lower part with a combustion chamber (,) The air-tight cover (,) is movable both vertically and rotatably on a horizontal plane, the fume-discharge conduit (,) being at least partly coaxial with the axis of rotation of the air-tight cover (,).

Loading system for electric arc furnaces

Method to process fumes and relative device

Melting method for an electric arc furnace with alternative sources of energy for the melting of iron-based alloys, the electric furnace (10) including tuyeres (13) positioned on the bottom to deliver oxygen, at least one tuyere (15) to deliver coal dust which works in the area of contact between the bath of molten metal (16) and the layer of slag (22), at least one supersonic lance (12) cooperating with a lance (29) to deliver coal dust, these lances (12, 29) having a working position (12c, 29c) in which the supersonic lance (12) is positioned in close proximity to the surface of the molten metal (16) and the lance (29) to deliver coal dust is positioned in the vicinity of the surface of the layer of slag (22), and a plurality of burners (28) positioned on the cooled sidewalls (31) of the furnace (10) and delivering oxygen-based gases and combustible substances, whereby at least two first burners (28) work with the action of one burner supporting the action of the next one, the furnace (10) being charged with one or more charges which provide for a first step of start-up of the melting and a second step of melting, a refining step and a tapping step being included, in which method in the first step of start-up of the melting at least one second burner (28e) collaborates in freeing quickly the path of introduction of the supersonic lance (12) and of the lance (29) to deliver coal dust.

Melting method for an electric ARC furnace with alternative sources of

Method to remove organic halogenated molecules from gaseous currents arriving as a residue of industrial working processes or not, the gaseous current being delivered into a reactor (16) containing a fluid bed consisting of at least one solid adsorbent element after having undergone at least one filtration followed by a cooling, the gaseous current cooperating with the solid particles with exchange by adsorption between the gaseous current and the solid particles, the reactor (16) achieving a time of contact between the gaseous current and the solid particles at least longer than 3 seconds, the gaseous current which enters the reactor (16) having a temperature lower than 80.degree. C., but advantageously between 30.degree. and 70.degree. C., the cooling of the gaseous current upstream of the reactor (16) being followed by a gas/water or gas/air heat exchanger (13). A plant to carry out the above method includes a reactor having a first input zone (17) and a second zone of exchange by adsorption between the gaseous current and a solid support in the form of fluid-bed particles kept in suspension, and a distribution plate (18) to introduce and distribute the gaseous current defining the second zone of the reactor (16), the reactor (16) having dimensions such as to achieve a passage time at least longer than 3 seconds, the concentration of solid support within the reactor (16) being between 0.1 and 0.5 kg per each cubic meter of gaseous substance.

Method to remove organic halogenated molecules from gaseous currents and

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Udine, Italy

Matteo Vittorio Losciale