The present invention relates to an electric arc furnace (1) comprising an electrode handling apparatus (30), comprising an electrode holder clamp (31) configured to vertically support said one or more electrodes; a first detection apparatus (40) configured to detect in real time the vertical position of said electrode-holder clamp (31) relative to a predefined reference point; - an image acquisition apparatus (60) configured to acquire images of said one or more electrodes when they are removed from the shell (10) and are positioned relative to the roof (20) in such a way that the tip and optionally also the wear zone are framed; a control unit of the electric arc furnace (70) comprising in turn an electrode adjustment system (700) which is configured to adjust the ignition and positioning of the electrodes inside the shell and is operatively connected to said electrode handling apparatus (30). Said control unit of the electric arc furnace (70) is operatively connected to said first detection apparatus (40) to acquire in real time the vertical position (YF) of said electrode-holder clamp relative to said predefined reference point and to said image acquisition apparatus ( 60 ) to acquire images of said electrodes. Said unit ( 70 ) is configured to process said images in such a way that at each electrode removal and for each electrode it calculates the length of the electrode (L Emin F). Said control unit of the electric arc furnace ( 70 ) is configured to calculate the vertical position (YE ) taken over time by the tip of the electrode relative to said predefined reference point, knowing the vertical position (YE) of said electrode- holder clamp acquired by said first detection apparatus ( 40 ) and the length of the electrode (L). Said control unit of the electric arc furnace ( 70 ) is configured to adj ust, via said electrode adj ustment system ( 700 ), the movements of the electrodes relative to the shell ( 10 ) in terms of vertical position and/ or speed and/ or the ignition time of the arc, as a function of predefined electrode management programs in different operating steps of the electric arc furnace based on the vertical position taken by the tip of the electrode, and/or is configured to generate an alarm signal in the event that, during one or more steps of the furnace operating cycle the trend of the vertical position taken by the tip of the electrode follows a temporal profile that deviates at least in part from a reference temporal profile within predefined tolerances.
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
F27B 3/28 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
F27D 11/08 - Chauffage par décharge électrique, p. ex. décharge d'arc
A welding spatter protection device has a support structure, a movable structure delimiting a first internal cavity by internal side walls and movable by a first actuator between a lowered position, in which the first internal cavity is placed astride a welding zone, and a raised position, in which the first internal cavity is moved away from the welding zone, and a cleaning system having a scraper. Two second internal side walls interconnect two first internal side walls defining two concentric cylindrical surfaces. The scraper is connected to the movable structure by a support arm actuatable by a second actuator. Circumferential ends of the concentric cylindrical surfaces at an inlet mouth and at an internal stop position are radially aligned so that the scraper is always in contact with the concentric cylindrical surfaces, oriented so that a radially outermost cylindrical surface extends beyond the bottom wall, defining a shielding appendage.
A continuous, high-temperature preheating plant for preheating flat semi-finished steel products has a conveying line suitable to transfer the flat semi-finished steel products from an inlet to an outlet of the continuous, high-temperature preheating plant, and a plurality of heating devices arranged along the conveying line to heat the semi-finished steel products from an inlet temperature to a predetermined final temperature. The plurality of heating devices has, arranged in sequence between the inlet and the outlet along the conveying line, a first induction furnace, a second induction furnace, and at least one electric resistance radiation furnace. The continuous, high-temperature preheating plant has a cutting apparatus suitable to cut a starting flat semi-finished steel product into a plurality of cut segments having a predetermined length less than a length of the starting flat semi-finished steel product. The cutting apparatus is arranged between the first induction furnace and the second induction furnace.
F27B 9/02 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité à trajets multiplesFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité à plusieurs chambresCombinaisons de fours
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
F27B 9/06 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité chauffés sans contact entre gaz de combustion et la chargeFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité chauffés électriquement
4.
FURNACE POWER SUPPLY APPARATUS, SYSTEM FOR THE POWER SUPPLY OF AN ELECTRIC ARC FURNACE OR A SUBMERGED ARC-RESISTANCE FURNACE, ELECTRIC ARC FURNACE OR SUBMERGED ARC-RESISTANCE FURNACE AND OPERATING METHOD
The present invention discloses a furnace power supply apparatus for the supply of an electric arc furnace or a submerged arc-resistance furnace with electric energy, —wherein the furnace power supply apparatus is connectable to a three-phase power network, —wherein the furnace power supply apparatus is connectable to at least one electrode of the electric arc furnace or the submerged arc-resistance furnace, —wherein the furnace power supply apparatus comprises: —a three-phase transformer with a primary circuit per phase and a secondary circuit per phase, in particular exactly one secondary circuit per phase, —a rectifier circuit, and—preferably a smoothing circuit zoo connected to the rectifier circuit, —and wherein the three-phase transformer is a phase-shifting transformer.
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
F27B 3/28 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
H02M 1/14 - Dispositions de réduction des ondulations d'une entrée ou d'une sortie en courant continu
H02M 7/04 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques
The present invention relates to a maintenance system for the tapping channel of an electric arc furnace. The maintenance system (1) comprises a platform (10) which is movable at a height lower than the bottom of the furnace vessel between at least one operating position, in which at least one free end (11) of the platform is arranged below the furnace vessel near the tapping channel, and a parking position, in which the free end (11) of the platform is not arranged below the furnace vessel. The system (1) further comprises a linear actuator (30) which is arranged at the free end of said platform (10) and is adapted to axially engage a ferrule with the aid of at least one support body (40) removably associable with the ferrule and a movable head (31) of the actuator. The actuator is axially movable with respect to a walking plane of said platform (10) between a lowered position and at least one lifted position, so as allow both the support in lowering in the extraction step of a worn ferrule from the tapping hole and the support in lifting in the insertion step of a replacement ferrule inside the tapping hole, previously freed from the worn ferrule. In use, said replacement ferrule is positioned on said platform above said axial translation device.
A flash welding machine welds together a first metal product's tail with a second metal product's head. The machine includes a carriage, a first structure with a first grip, a second structure slidingly supported by the carriage with a second grip. The power group includes an inverter, a transformer, a rectifier, a control unit operating the inverter at frequencies greater than 700 Hz, and conductors connected to the first and second grips. The transformer delivers predetermined nominal power at a predetermined nominal supply frequency. The predetermined nominal power is less than the predetermined operating power and the nominal supply frequency is less than 700 Hz. At frequencies greater than 700 HZ, actual power equal to/greater than predetermined operating power, or the predetermined nominal power of the transformer is at least equal to predetermined operating power and nominal supply frequency is greater than 700 Hz, with actual power greater than predetermined operating power.
The invention relates to a furnace power supply apparatus (20) for the supply of an electric furnace with electric energy, wherein the furnace power supply apparatus (20) is connectable to a three-phase power network (10) and at least one electrode (30) of the electric furnace, wherein the furnace power supply apparatus (20) comprises at least one power module (100), wherein the power module (100) comprises a rectifier stage (110), connectable to a three-phase power network (10), and a converter stage (120), connectable to at least one electrode (30) of the electric furnace, wherein the furnace power supply apparatus (20) comprises at least one DC bus (130), wherein the DC bus (130) connects the rectifier stage (110) to the converter stage (120) of the at least one power module (100), wherein the furnace power supply apparatus (20) comprises a cooling system (140).
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
F27D 11/08 - Chauffage par décharge électrique, p. ex. décharge d'arc
H05B 7/144 - Sources de puissance spécialement adaptées pour le chauffage par décharge électriqueCommande automatique de la puissance, p. ex. en commandant la position des électrodes
F27D 99/00 - Matière non prévue dans les autres groupes de la présente sous-classe
8.
ELECTRIC ARC FURNACE WITH SLAG LEVEL REGULATION SYSTEM AND METHOD OF SLAG LEVEL REGULATION IN AN ELECTRIC ARC FURNACE
C21B 11/10 - Fabrication de la fonte brute autrement que dans les hauts fourneaux dans des fours électriques
C21B 13/12 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours électriques
C21C 5/52 - Fabrication de l'acier au four électrique
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
9.
ELECTRIC ARC FURNACE WITH SLAG LEVEL REGULATION SYSTEM AND METHOD OF SLAG LEVEL REGULATION IN AN ELECTRIC ARC FURNACE
The present invention relates to an electric arc furnace (1) comprising: a shell (10) for containing a bath of molten metal (M), on which a layer of slag (S) floats in use, which extends in height from the surface of said bath up to an upper level (H) varying over time, said shell (10) being provided with a tapping channel (11) and a slag door (12); a detection apparatus (40) suitable to detect the upper slag level over time. The furnace comprises a slag level regulation system (50) which : includes said detection apparatus (40); is connected to said slag door (12); and is programmed to regulate the upper slag level during the operation of the furnace (1) in accordance with a predefined adjustment strategy based on values of said upper level (H) detected by said detection apparatus (40), performing one or more partial slagging operations by means of controlled opening and closing of said slag door to discharge the excess slag. The invention also relates to a method for regulating the slag level in an electric arc furnace.
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
C21B 11/10 - Fabrication de la fonte brute autrement que dans les hauts fourneaux dans des fours électriques
C21B 13/12 - Fabrication de fer spongieux ou d'acier liquide par des procédés directs dans des fours électriques
C21C 5/52 - Fabrication de l'acier au four électrique
The present invention relates to a steel plant (1) comprising at least one electric arc furnace (10) and a fume collection and treatment system (100) adapted to collect and treat gaseous emissions produced by steel plant (1). Said fume collection and treatment system (100) comprises : a primary suction line (110) fluidically connected to the electric arc furnace (10) to suck the fumes generated in said electric arc furnace (10); at least a first secondary suction line (120) adapted to ventilate the environment surrounding the electric arc furnace (10) by means of at least one fume hood (120a). Along said primary suction line (110) there are arranged in sequence starting from the electric arc furnace (10) at least: - a post-combustion chamber (111), a fume cooling apparatus (112), and a CO2 capture apparatus (113). The first secondary suction line (120) flows into the primary suction line (110) downstream of the CO2 capture apparatus or discharges into the atmosphere separately from said primary suction line (110). The primary suction line (110) comprises a recirculation line (130) to recirculate at least part of the gaseous emissions to the post-combustion chamber (111). The recirculation line (130) fluidically connects the section of the primary suction line (110) between the cooling apparatus (112) and the CO2 capture apparatus (113) with the section of the primary suction line (110) upstream of the post-combustion chamber (111). The plant (1) comprises a control system (132, 133) of the recirculation flow rate of the gaseous emissions to the post-combustion chamber (111) configured to adjust the recirculation flow rate at a sufficient value to reduce the entry of comburent air to the post-combustion chamber to the stoichiometric minimum, maintaining the temperature in the post-combustion chamber within a predetermined temperature range.
A system for winding a rolled product includes a winder having a winding spool, a spool rotator, a distributor guiding positioning of the rolled product towards the spool at an instantaneous winding point, and a distributor translator. A control and command unit coordinates the rotator and the translator according to a predetermined winding program which is a function of predetermined reference operating parameters and of real time operating parameters. The detector includes a laser triangulation profilometer diametrically opposite to the distributor, and continuously detects the surface profile of the coil of rolled product at every added turn. A processing and calculation unit feedback adjusts translation speed of the distributor to minimize a difference between an actual operating parameter calculated based on the profile of the coil in formation detected by the profilometer and the same operating parameter calculated based on theoretical data related to a predetermined ideal coil winding.
B65H 54/28 - Dispositifs de va-et-vientDispositions pour la mise en forme des paquets
G01B 11/10 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des diamètres d'objets en mouvement
G01B 11/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la rugosité ou l'irrégularité des surfaces
C21C 5/52 - Fabrication de l'acier au four électrique
F23D 14/22 - Brûleurs à gaz sans prémélangeur, c.-à-d. dans lesquels le combustible gazeux est mélangé à l'air de combustion à l'arrivée dans la zone de combustion avec des conduits d'alimentation en air et en gaz séparés, p. ex. avec des conduits disposés parallèlement ou se croisant
F23D 14/32 - Brûleurs pour la combustion d'un gaz, p. ex. d'un gaz stocké sous pression à l'état liquide utilisant un mélange de combustible gazeux et d'oxygène pur ou d'air enrichi d'oxygène
F27B 3/22 - Aménagement des dispositifs d'alimentation en air ou gaz
F27D 3/16 - Introduction d'un jet de fluide ou d'un courant dans la charge
The present invention relates to an injector-burner (1) for the simultaneous injection of at least one fuel gas and oxygen that is either pure or in an enriched mixture, into a metallurgical melting furnace. Said injector-burner (1) has a double nozzle configuration, with a first internal nozzle (10) and a second nozzle (20) concentrically external to said first nozzle (10). The first nozzle (10) has a convergent/divergent shape defined by a narrowing (13) formed in a position upstream of an outlet end section (11) thereof so as to be able to generate a gaseous jet at supersonic speed, said first emission conduit (10") being provided with an inlet for oxygen (61). The second nozzle (20) has a convergent shape towards said injector axis (X) to an outlet end section (21) thereof so as to be able to generate a gaseous jet at subsonic speed contiguous with the jet generated by the first nozzle, said second emission conduit (20") being provided with one or more inlets (70, 71, 72) for one or more fuel gases. The injector-burner 1 comprises a flow rectifier (31, 32) arranged inside said second emission conduit (20") in an intermediate axial position between said second nozzle (20) and said one or more inlets (70, 71, 72) of fuel gas, said flow rectifier (31, 32) intercepting the entire annular flow section of said second emission conduit (20") in said intermediate axial position.
C21C 5/52 - Fabrication de l'acier au four électrique
F27D 3/16 - Introduction d'un jet de fluide ou d'un courant dans la charge
F27B 3/22 - Aménagement des dispositifs d'alimentation en air ou gaz
F23D 14/22 - Brûleurs à gaz sans prémélangeur, c.-à-d. dans lesquels le combustible gazeux est mélangé à l'air de combustion à l'arrivée dans la zone de combustion avec des conduits d'alimentation en air et en gaz séparés, p. ex. avec des conduits disposés parallèlement ou se croisant
F23D 14/32 - Brûleurs pour la combustion d'un gaz, p. ex. d'un gaz stocké sous pression à l'état liquide utilisant un mélange de combustible gazeux et d'oxygène pur ou d'air enrichi d'oxygène
15.
METHOD FOR REGULATING AN OPERATION OF AN ELECTRIC FURNACE AND ELECTRIC FURNACE FOR MELTING OF MELTING MATERIAL
The present invention relates to a method for regulating an operation of an electric furnace (10) during a melting process of melting material, the method comprising the following method steps : - model predictive calculating (S1) of a target course of at least one operating property (Op) up to a time horizon (N) based on a result to be achieved of the melting process; and - setting (S2) the at least one operating property (Op) by means of the electrode positioning means (30) and/or the electrical power supply means (50) in such a way that the at least one operating property (Op) lies on the target course of the at least one operating property (Op) at a predetermined future point in time. The present invention further relates to an electric furnace (10) configured to execute a method for regulating an operation of an electric furnace (10) during a melting process of melting material.
C21C 5/52 - Fabrication de l'acier au four électrique
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
F27B 3/28 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 7/04 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques
H05B 7/144 - Sources de puissance spécialement adaptées pour le chauffage par décharge électriqueCommande automatique de la puissance, p. ex. en commandant la position des électrodes
17.
FURNACE POWER SUPPLY APPARATUS, SYSTEM FOR THE POWER SUPPLY OF A FURNACE, FURNACE, USE OF THE FURNACE POWER SUPPLY APPARATUS AND OPERATING METHOD
The present invention discloses a furnace power supply apparatus (100) for the supply of an electric arc furnace, electric re- duction furnace or a submerged arc-resistance furnace with elec- tric energy, - wherein the furnace power supply apparatus (100) is con- nectable to a three phase power network (110), - wherein the furnace power supply apparatus (100) is con- nectable to at least one electrode (120), - wherein the furnace power supply apparatus (100) comprises: - at least one AC/DC converter circuit (130) connectable to the three phase power network (110) and configured to rectify an alternating current of at least one phase of the three phase power network (110), - at least one DC/DC converter circuit (150) configured to handle a voltage level higher than or equal to 500 VDC.
H05B 7/144 - Sources de puissance spécialement adaptées pour le chauffage par décharge électriqueCommande automatique de la puissance, p. ex. en commandant la position des électrodes
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 7/04 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques
A steel making plant includes an electric arc furnace and a fume collection and treatment system. The system includes a first primary suction line fluidically connected to the electric arc furnace to suck fumes generated in the electric arc furnace. A secondary suction line is for ventilating the environment surrounding the electric arc furnace by a suction hood. A filtration apparatus is for filtering emissions collected by the fume collection and treatment system before they are discharged into the atmosphere. The electric arc furnace is powered by a continuous charging system. A fume cooling apparatus, a dust collecting device and a denox selective catalytic reduction apparatus are arranged in sequence along the first primary suction line, starting from the electric arc furnace. The secondary suction line flows into the first primary suction line downstream of the denox selective catalytic reduction apparatus and upstream of the filtration apparatus.
C21C 5/52 - Fabrication de l'acier au four électrique
F27D 17/20 - Dispositions pour le traitement ou l’épuration des gaz résiduaires
19.
FURNACE POWER SUPPLY APPARATUS, SYSTEM FOR THE POWER SUPPLY OF AN ELECTRIC ARC FURNACE OR A SUBMERGED ARC-RESISTANCE FURNACE, ELECTRIC ARC FURNACE OR SUBMERGED ARC-RESISTANCE FURNACE AND OPERATING METHOD
The present invention discloses a furnace power supply apparatus for the supply of an electric arc furnace or a submerged arc-resistance furnace with electric energy, - wherein the furnace power supply apparatus is connectable to a three-phase power network, - wherein the furnace power supply apparatus is connectable to at least one electrode of the electric arc furnace or the submerged arc-resistance furnace, - wherein the furnace power supply apparatus comprises: - a three-phase transformer with a primary circuit per phase and a secondary circuit per phase, in particular exactly one secondary circuit per phase, - a rectifier circuit, and - preferably a smoothing circuit connected to the rectifier circuit, - and wherein the three-phase transformer is a phase-shifting transformer.
H05B 7/144 - Sources de puissance spécialement adaptées pour le chauffage par décharge électriqueCommande automatique de la puissance, p. ex. en commandant la position des électrodes
F27B 3/08 - Fours à sole, p. ex. fours à réverbérationFours à arc électrique à chauffage électrique, p. ex. fours à arc électrique, avec ou sans une autre source de chaleur
The present invention concerns an injector-burner (1) for electric arc furnaces, having an ax i a 1 - s ymme trie extension with respect to a longitudinal axis (X) and defining sequentially from said axis (X) outwards : a central nozzle (3); a first annular chamber (10); a second annular chamber (20); and a third annular chamber (30). The inj ector-burner (1) comprises a head (2), which is coaxially crossed by said central nozzle (3) and is provided with several circular series of nozzles (100; 210, 220) which connect the first annular chamber (10) and the second annular chamber (20) with the outside of the inj ector-burner. It comprises a main injector body (40) which is made in a single piece and on which the following are made : the head (2); the central nozzle (3); a first annular cavity (41) which is axially open in a position opposite said head (2) and defines the bottom of the first annular chamber (10); a second annular cavity (42) which is axially open in a position opposite said head (2) and delimits the second annular chamber (20); and a third annular cavity (43) which is radially open and delimits the third annular chamber (30). The injector-burner (1) further comprises: a tubular body (51) sealingly associated directly on said main injector body (40) coaxially to said central nozzle (3) at said first annular cavity (41) to delimit the first annular chamber (10); an annular cover (52) sealingly associated directly to said main injector body (40) coaxially with said central nozzle (3) to axially close said second annular cavity (42); and a circular band (53) sealingly associated directly to said main injector body (40) to radially close said third annular cavity (43). The tubular body (51) and the annular cover (52) are associated with different portions of said main injector body (40) axially and radially spaced apart from each other.
The present invention relates to a steel making plant (1) comprising at least one electric arc furnace (10) and a fume collection and treatment system (100) comprising: a first primary suction line (110) fluidically connected to the electric arc furnace (10) to suck the fumes generated in said electric arc furnace (10); a secondary suction line (120) suitable for ventilating the environment surrounding the electric arc furnace (10) by means of at least one suction hood (121); and at least one filtration apparatus (130) suitable for filtering the emissions collected by said fume collection and treatment system (100) before they are discharged into the atmosphere. The electric arc furnace (10) is powered by a continuous charging system (11). A fume cooling apparatus (111), a dust collecting device (112) and a denox selective catalytic reduction apparatus (113) are arranged in sequence along said first primary suction line (110), starting from the electric arc furnace (10). The secondary suction line (120) flows into the first primary suction line (110) downstream of the denox selective catalytic reduction apparatus (113) and upstream of said at least one filtration apparatus (130).
The present invention relates to a steel making plant (1) comprising at least one electric arc furnace (10) and a fume collection and treatment system (100) comprising: a first primary suction line (110) fluidically connected to the electric arc furnace (10) to suck the fumes generated in said electric arc furnace (10); a secondary suction line (120) suitable for ventilating the environment surrounding the electric arc furnace (10) by means of at least one suction hood (121); and at least one filtration apparatus (130) suitable for filtering the emissions collected by said fume collection and treatment system (100) before they are discharged into the atmosphere. The electric arc furnace (10) is powered by a continuous charging system (11). A fume cooling apparatus (111), a dust collecting device (112) and a denox selective catalytic reduction apparatus (113) are arranged in sequence along said first primary suction line (110), starting from the electric arc furnace (10). The secondary suction line (120) flows into the first primary suction line (110) downstream of the denox selective catalytic reduction apparatus (113) and upstream of said at least one filtration apparatus (130).
A rolling mill for solid elongated products, defining a rolling axis, including first and second rolling stations. Each station includes a load-bearing structure, a removable roll-holder cartridge with three rolling rolls movable radially and rotating around three equally spaced axes of rotation, and a roll having a vertical rotational axis. Three actuators mount on the load-bearing structure; three gear motor groups connect to the rolls by single extensions. The position of the second station rolls is rotated 60° from the first stations. The rolls with a vertical axis of the first and second stations are arranged on opposite sides of the rolling axis. All rolling stations allow lateral extraction of roll-holder cartridges from the same side of the rolling mill. The stations on the cartridge extraction side have actuators movable relative to the load-bearing structure. The stations with vertical rolls arranged on the opposite side have fixed actuators.
B21B 31/10 - Changement des cylindres, des supports de cylindres ou des châssis par déplacement horizontal
B21B 13/10 - Cages de laminoirs, c.-à-d. ensembles composés d'un châssis, de cylindres et d’accessoires dont les axes des cylindres sont disposés dans des directions différentes, p. ex. pour le processus de laminage dit "universel" les axes étant tous dans le même plan
B21B 17/14 - Laminage des tubes par des cylindres dont les axes sont pratiquement perpendiculaires à l'axe des pièces travaillées, p. ex. laminage "axial" sans mandrin
B21B 31/18 - Réglage des cylindres en déplaçant les cylindres dans le sens axial
A rolling mill for solid elongated products, defining a rolling axis, including first and second rolling stations. Each station includes a load-bearing structure, a removable roll-holder cartridge with three rolling rolls movable radially and rotating around spaced rotational axes, and a roll having a vertical rotational axis. A system synchronizes mechanical adjustment of the rolls. Three actuators mount on the load-bearing structure; three gear motor groups connect to the rolls by single extensions. The second station rolls are rotated 60° from the first stations. The rolls with a vertical axis of the first and second stations are arranged on opposite sides of the rolling axis. All rolling stations allow lateral extraction of roll-holder cartridges from the same side of the rolling mill. The stations on the extraction side have actuators movable relative to the load-bearing structure. The stations with vertical rolls arranged on the opposite side have fixed actuators.
B21B 13/02 - Cages de laminoirs, c.-à-d. ensembles composés d'un châssis, de cylindres et d’accessoires dont les axes des cylindres sont disposés horizontalement
Furnace (1) with movable beam load handling system, in particular for heating or heat treatment of ferrous or non-ferrous metallic material (M), comprising : a furnace chamber (2) extending between a furnace-loading section (2a) and a furnace-unloading section (2b) of the material (M) along a longitudinal direction (X-X); first beams (10), arranged inside said chamber (2) and defining a plurality of main supports for the material (M) to be treated in said chamber (2), extending in length between said furnace-loading section (2a) and said furnace-unloading section (2b), spaced transversely apart from each other to support said material (M) in different transverse positions in the furnace chamber (2), raised from a hearth (3) of said chamber; second beams (20), arranged inside said chamber and defining a plurality of temporary supports for the material (M), extending in length between said furnace-loading section (2a) and said furnace-unloading section (2b), spaced transversely apart from each other and alternating with said main supports, wherein said second beams (20) are cyclically movable with respect to the first beams (10) so as to impart to said material (M) a movement between said furnace-loading section (2a) and said furnace-unloading section (2b) having a motion component parallel to said longitudinal direction (X-X). Said first beams (10) or said second beams (20), or both the first (10) and the second beams (20), are movable with respect to the furnace chamber (2) with movements having a motion component (Y-Y) transverse to said longitudinal direction (X-X), in order to generate relative movements between the material (M) and the first beams (10) transversally to said longitudinal direction (X-X) so as to cyclically vary the transverse resting positions of the material (M) on the first beams (10).
F27B 9/20 - Fours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité caractérisés par le trajet de la charge pendant le traitementFours dans lesquels la charge est déplacée mécaniquement, p. ex. du type tunnel Fours similaires dans lesquels la charge se déplace par gravité caractérisés par le procédé de déplacement de la charge pendant le traitement la charge se déplaçant sur un trajet sensiblement rectiligne
C21D 9/00 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet
AXIAL CYCLONIC APPARATUS FOR THE ABATEMENT OF PARTICULATE MATTER AND SPARKS FROM A GASEOUS FLOW AND SMOKE SUCTION SYSTEM OF A METALLURGICAL FURNACE PROVIDED WITH SUCH CYCLONIC APPARATUS
The present invention concerns an axial cyclonic apparatus (1) for the abatement of particulate matter and sparks from a gaseous flow, comprising: - a containment mantle (10) that extends along an axial direction X between an inlet opening (2) and an outlet duct (3); and - a first vaned body (4) which is equipped with a plurality of first vanes (41) and is arranged near said inlet opening (2) coaxially thereto. The first vanes are adapted to give a centrifugal radial component to the incoming axial gaseous flow. The outlet duct extends coaxially at least partially inside the mantle and delimits with an end portion (12) of such mantle a peripheral annular chamber (20) for the interception of the particulate matter which separates itself from the gaseous flow. The peripheral annular chamber is closed downstream in a longitudinal direction and is radially communicating with a particulate collection chamber (21). The containment mantle comprises an axially divergent truncated-cone portion (11) which connects the inlet opening (2) to the end portion (12) of the mantle which externally defines the peripheral annular chamber (20). The divergent truncated-cone portion forms with the axial direction X an angle of divergence δ between 5° and 15°. The first vaned body (4) is arranged at the divergent, truncated-cone portion (11). The first vanes (41) each form an angle of detachment a of between 40° and 50° relative to said axial direction X.
B01D 45/16 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge en utilisant la force centrifuge produite par le mouvement hélicoïdal du courant gazeux
B04C 3/06 - Structures des entrées ou sorties de la chambre où se produit le tourbillon
28.
COIL WINDING METHOD AND SYSTEM OF A HOT ROLLED PRODUCT
The present invention concerns a coil winding system of a hot-rolled product comprising: • - a rotating coiler (10) with a vertical axis Y, comprising an outer drum (11) and an inner mandrel (12) coaxial with the outer drum, wherein the outer drum and the inner mandrel delimit an annular interspace (13), which is closed at the bottom by a bottom wall (14) integral with the drum (11) and/or the mandrel (12) and within which the hot-rolled product is deposited and wound in the form of a reel; - means (20) for conveying the hot-rolled product entering the rotating coiler towards the annular interspace. The conveying means are associated with a support frame (21) which is rotationally fixed relative to said coiler. The system comprises means (30) for diverting the hot-rolled product inside the annular interspace from the winding trajectory induced by the rotation of the coiler. The diverting means are located downstream of the conveying means with respect to the entering movement of the hot-rolled product into the coiler and are adapted for setting the radial winding distance R of the hot-rolled product relative to the vertical axis Y of the coiler inside the annular interspace. The diverting means comprise a diverter element (31) which in use comes into contact with the hot-rolled product and the orientation of which inside the annular interspace is adjustable so as to vary the setting of the radial windin distance.
B21C 47/04 - Enroulement ou bobinage sur ou dans des bobines ou des tambours, sans utiliser de guide mobile
B21C 47/14 - Enroulement ou bobinage au moyen d'un guide mobile au moyen d'un guide rotatif, p. ex. déposant le matériau autour d'une bobine ou d'un tambour fixe
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
Produits et services
High-speed braking installations and plate rods. Customised manufacture of machines and instruments having a protective surface coating; Treatment of unprocessed metal; Processing of metal surfaces using precision grinding techniques; Machining parts for others; Metal fabrication and finishing services.
The invention relates to a plant for vacuum degassing liquid steel, comprising: - at least one vacuum chamber 2, suitable to temporarily receive liquid steel inside it; - a vacuum generation system 10, connected to said at least one vacuum chamber 2 via an intake duct 20. The vacuum generation system 10 comprises at least two compression stages connected together in series, of which: a first compression stage 11 works closer to the aforesaid at least one vacuum chamber and is composed of one or more screw pumps 110; and a second compression stage 12 works farther with respect to said at least one vacuum chamber 2 to bring the gases at least to atmospheric pressure and is composed of one or more liquid ring pumps 120. The aforesaid one or more screw pumps are sized to be able to operate with compression ratios not exceeding 1:12 if the discharge pressure is atmospheric, and with compression ratios not exceeding 1:200 if the discharge pressure is comprised between 50 and 120 mbar absolute. Preferably, the screw pumps are sized to be able to operate with compression ratios comprised between 1:3 and 1:10 if the discharge pressure is atmospheric and, if the discharge pressure is between 50 and 120 mbar absolute, with compression ratios of between 1:25 and 1:200, and preferably between 1:70 and 1:90. The present invention also relates to a method for vacuum degassing liquid steel.
The present invention relates to a apparatus for statically quenching a product (1) coming from a rolling plant, comprising a seat for housing the product (1) so that, when the product (1) is housed there, its main development axis (A) coincides with the positioning axis (Z), a series of nozzles (4) arranged around the positioning axis (Z), along a curvilinear surface (3), open at the bottom, and adjustable so as to dispense a flow which is tangential to the surface of the product (1). The invention also relates to a process for static quenching of the product, implementable by such apparatus.
C21D 9/08 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour corps tubulaires ou tuyaux
C21D 1/667 - Dispositifs pour trempe pour la trempe par pulvérisation
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Machines and machine tools; Motors and engines (except for land vehicles); Machine coupling and transmission components (except for land vehicles); Gears, other than for land vehicles; Transmission gears for machines; gearing for machines; Worm gear reduction units; Step-up gears for machines; Worm gear pairs; Worm wheels for machines; Toothed racks (parts of machines); Spline shafts (parts of machines). Building construction; Repair; Installation services. Scientific and technological services and research and design relating thereto; Industrial analysis and research services.
Machines and machine tools, including lathes, boring mills,
mechanical presses, evener rolls, rolling mills for ferrous
and non-ferrous metals, extrusion presses, continuous
casting machines; motors and engines (except for land
vehicles); couplings and transmission belts (except for
vehicles); large agricultural implements; incubators.
Machines and machine tools, including lathes, boring mills, mechanical presses, evener rolls, rolling mills for ferrous and non-ferrous metals, extrusion presses, continuous casting machines; motors and engines (except for vehicles); couplings and transmission belts (except for vehicles); large agricultural implements; incubators.
Machines and installations for the manufacture of wire or rods of metal in coil form; winding machines and lines for the winding of wire or rods of metal for the manufacture of coils.
Machines and machine tools, including lathes, boring mills, mechanical presses, evener rolls, rolling mills for ferrous and non-ferrous metals, extrusion presses, continuous casting machines; motors and engines (except for land vehicles); couplings and transmission belts (except for vehicles); large agricultural implements; incubators. Electric furnaces for continuous casting machines.
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Hot and cold rolling machines and plant; machines and plant for steelworks and casting; machines and plant for crushing and recycling metal scrap; installations and machines for wire-drawing factories; installations and machines for hot and cold iron working; installations and machines for transporting and packaging rolled and drawn goods in general. Heating and casting furnaces and installations; machines and installations for purifying water and smoke. Design and consultancy for plant and installations for rolling mills, steelworks and wire-drawing factories; design and consultancy for hot and cold iron working.
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Machinery and lines for the production of metallic semi-worked products, including continuous casting systems and castings Casting machines Purification machines Breaking Machines Sheet metal machines Rolling-mills Machines for the working and processing of metals Wire-drawing machines Conveyor belts. Furnaces Water conditioners Heating apparatus. Water treatment Air purification Rolling and metals treatment. Technological advice for the working, processing and handling of metals Planning of machines, equipment and plants for the working, processing and handling of metals.
Machines et machines-outils, à savoir tours,
fraiseuses-aléseuses, presses mécaniques, rectifieuses à
cylindres, laminoirs pour métaux ferreux et non ferreux,
boudineuses, machines à coulée continue, moteurs (excepté
pour véhicules); accouplements et courroires de transmission
(excepté pour véhicules); grands instruments pour
l'agriculture; couveuses. Fours électriques pour machines à coulée continue.
