Abstract: A process for the granulation of slag deriving from iron and steel production, in particular a process for the granulation of slag in air, and an apparatus configured to perform this process, provide for the production of granulates with different characteristics depending on the intended use, thus making this process and apparatus particularly versatile. More specifically, a process according to the present invention includes a step of controlling and modifying the time and/or the cooling rate of the slag granules so as to obtain slag granules having desired morphological features.

Abstract: Pyro-hydrometallurgical methods are described to economically and environmentally recover a target metal from iron slag or steel slag. For instance, the method can enable subjecting an iron or steel slag feed to acid-baking with an acid to produce a dried mixture comprising at least one soluble metal salts, then subjecting the dried mixture to water leaching to an aqueous solution comprising an aqueous leachate rich in said target metal and solid residues and subsequently separating the aqueous leachate rich in said target metal from the solid residues. This acid-baking water-leaching method facilitates efficient recovery of target metal compared to conventional methods.

Abstract: The invention relates to a flat-flame vault burner (10) suitable for being installed in a vault (21) which delimits the combustion chamber (20) of a steel heating furnace, the burner (10) comprising a main metallic hollow cylindrical body (12), a single duct (13) for the conveyance of fuel gas concentric to the main body (12), and a central internal nozzle (14) for the injection of a fuel gas. Said burner also comprises at least two nozzles (17) outside said main body (12) for the injection of fuel into the combustion chamber (20).

Abstract: Gas burner (1) comprising a main metal body (6), an inner lance (11) for combustible gas, at least two outer lances (10) for combustible gas, a single duct (8) for conveying pre-heated air, a regulation system for the combustible gas, a refractory unit (30), characterized in that said gas burner (1) comprises a series of nozzles (20) for the injection of the preheated air into the combustion chamber, and in that, by operating on the gas regulation system, it is possible to switch, with continuity, from a flame functioning mode of the burner to a flameless functioning mode, the latter characterized by low emissions of polluting agents.

Abstract: The invention relates to a flat-flame vault burner (10) suitable for being installed in a vault (21) which delimits the combustion chamber (20) of a steel heating furnace, the burner (10) comprising a main metallic hollow cylindrical body (12), a single duct (13) for the conveyance of fuel gas concentric to the main body (12), and a central internal nozzle (14) for the injection of a fuel gas. Said burner also comprises at least two nozzles (17) outside said main body (12) for the injection of fuel into the combustion chamber (20).

Abstract: A multifunction injector (10, 11, 12) comprising a De Laval nozzle (20) adapted to act as a burner at subsonic or supersonic speed, combined with a plurality of nozzles (31, 32) for fuel and comburant respectively, arranged in two rings, concentric and co-axial to said De Laval nozzle (20) and externally protected by a specifically shaped protection cavity (40).

Abstract: A multifunction injector (10, 11, 12) comprising a De Laval nozzle (20) adapted to act as a burner at subsonic or supersonic speed, combined with a plurality of nozzles (31, 32) for fuel and comburant respectively, arranged in two rings, concentric and co-axial to said De Laval nozzle (20) and externally protected by a specifically shaped protection cavity (40).

Abstract: Gas burner (1) comprising a main metal body (6), an inner lance (11) for combustible gas, at least two outer lances (10) for combustible gas, a single duct (8) for conveying pre-heated air, a regulation system for the combustible gas, a refractory unit (30), characterized in that said gas burner (1) comprises a series of nozzles (20) for the injection of the preheated air into the combustion chamber, and in that, by operating on the gas regulation system, it is possible to switch, with continuity, from a flame functioning mode of the burner to a flameless functioning mode, the latter characterized by low emissions of polluting agents.

Abstract: A TPV apparatus for generating electric power, which comprises a combustion chamber comprising a burner device generating, by means of the combustion of fuel and combustion air, hot gases providing an amount of thermal power. The TPV apparatus further comprises a converter assembly, which is associated to the combustion chamber and converts into electric power at least a portion of the amount of thermal power. The converter assembly comprises a plurality of TPV modules, positioned internally to the combustion chamber.

Abstract: A TPV conversion module for generating electric power comprising an emitter body, which emits IR radiation, when said emitter body is heated by the hot gases generated by a burner device and a receiver body, which is associated to said emitter body. The receiver body comprises one or more TPV cells, which include a multi-layered structure, provided with at least a layer of organic material.

Abstract: A method of producing a calcined raw meal and of producing additional steam in an existing steam generator comprises the following steps: pulverized raw meal, hydrocarbon, primary air and secondary air are fed to a calciner system (60), wherein the raw meal is calcined in a temperature range between 850° C. and 950° C., the calcined raw meal is separated from the calciner flue gases at the exit of the calciner system, the calcined raw meal is directed through a cooler (70), in which it exchanges its heat with the secondary air, the calciner exhaust gases are directed in the gas path of the backpass of the steam generator (1) at an appropriate temperature window and are used for steam production. The raw meal consists mainly of limestone (CaCO3) and the calcined material is mainly lime (CaO). The fuel feed (4) to the steam generator (1) is reduced during introduction of the exhaust gases into its backpass.

Abstract: A method of producing a calcined raw meal and of producing additional steam in an existing steam generator comprises the following steps: pulverized raw meal, hydrocarbon, primary air and secondary air are fed to a calciner system (60), wherein the raw meal is calcined in a temperature range between 850 ° C. and 950 ° C., the calcined raw meal is separated from the calciner flue gases at the exit of the calciner system, the calcined raw meal is directed through a cooler (70), in which it exchanges its heat with the secondary air, the calciner exhaust gases are directed in the gas path of the backpass of the steam generator (1) at an appropriate temperature window and are used for steam production. The raw meal consists mainly of limestone (CaCO3) and the calcined material is mainly lime (CaO). The fuel feed (4) to the steam generator (1) is reduced during introduction of the exhaust gases into its backpass.

Abstract: A force-convection heat exchanger for a rotary electrical machine, which includes one or more tubing elements arranged between the conductors that constitute the stator windings of the rotary electrical machine. A cooling fluid circulates into the tubing elements.

Abstract: A forced-convection heat exchanger for a rotary electrical machine, the particularity of which is the fact that it comprises one or more tubing elements arranged between the conductors that constitute the stator windings of said rotary electrical machine, a cooling fluid circulating into said tubing elements.

Abstract: An emission treatment apparatus for manufacturing plants including an inlet duct, a decantation chamber and an outlet duct. The emission treatment apparatus advantageously includes elements located inside of the decantation chamber for rendering uniform the flow of the emissions.

Abstract: The section of an electrical high-voltage system has a gas-filled housing of predominantly symmetrical design. Provided in the housing are a conductor extending along a plane of symmetry of the housing, and cooling means for producing a circulation flow which dissipates heat loss from the conductor. The cooling means contains two blowers. The blowers are arranged in the interior of the housing and designed in such a way that, during the operation of the system, two mirror-symmetrical circulation part flows are formed which are bounded by the plane of symmetry. These circulation part flows are in each case guided without recirculation along a housing side wall from the top of the housing or the bottom of the housing. By this means, the heat loss is given up particularly effectively to the housing side walls, and the conductor can be loaded with very high operating currents.