The invention relates to a steel product processing plant, in particular including a rolling line and preferably upstream thereof a continuous casting line including at least one steel product direct cooling or cleaning system, or another system suitable to spray water on the product being processed; and a system for the separation of mixtures, in particular of a muddy nature, including water and scale deriving from said systems, which is provided with at least two pits (F1, F2) for collecting the mixtures, wherein at least a first pit (F1), advantageously provided with a dredging system for continuously removing the scale, is fed by water with coarse scale and at least a second pit (F2) with water with fine scale and wherein said pits each have a maximum overall depth <10 m, preferably even less.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
2.
HEATING PANEL, PROCESS GAS HEATER COMPRISING SAID PANEL AND METHOD FOR MONITORING THE CONDITIONS OF SAID PANEL
The present invention relates to a heating panel which allows to easily monitor the status of each heating element so as to quickly identify a malfunction and act by replacing the panel inside a heating module. The heating panel is highly reliable and easy to maintain. The heating panel (P) comprises at least one heating element (T) formed by a triplet of resistors (R1, R2, R3) mutually connected in a star pattern, in which each free end of each resistor (R1, R2, R3) of said triplet receives power from a different phase of a three-phase system and is connected, by at least one controlled switch (SCR, 4), to a first busbar (3). A first control switch (2A) is interposed between the controlled switches (SCR, 4) and said first busbar (3). Furthermore, the first busbar (3) is connected to at least one transformer (1 ) by at least one second control switch (2B). The star center (CS) of the triplet (R1, R2, R3) is in turn connected to a second busbar (8). Furthermore, a current measuring device (6) is provided, positioned between the star center (CS) of the triplet (R1, R2, R3) and the second busbar (8) or along said second busbar (8), so as to detect the extent of the possible current passing through the star center (CS) of the triplet, and in which a control unit (PLC) is provided which is adapted to receive measurement data coming from said current measuring device (6) in order to monitor the conditions of the heating panel (P).
A coiler furnace (1), in particular for winding a metal product coming from a reversible rolling mill, comprising - a thermally insulated casing (2) delimiting an inner chamber (3) of the furnace; - a winding device (4) for winding the product, arranged in said inner chamber (3), comprising a winding drum (5) provided with a receiving opening (6) for receiving the head of the product; - an opening (7) for the product to enter or exit the casing, arranged at a lower part of said casing (2); - at least one carriage (8), translatable transversely to an advancement direction of the product, provided with a first working section (9) configured to occupy a working position, beneath said casing (2) at said opening (7), and a respective resting position, provided laterally to said working position, and a second emergency section (10) configured to occupy a respective resting position when the first section (9) occupies the working position, and occupy said working position when said first section (9) occupies the respective resting position.
B21B 1/34 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a non-continuous process in reversing mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
F27B 17/00 - Furnaces of a kind not covered by any of groups
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
B21C 47/06 - Winding-up or coiling on or in reels or drums, without using a moving guide with loaded rollers, bolts, or equivalent means holding the material on the reel or drum
B21C 47/26 - Special arrangements with regard to simultaneous or subsequent treatment of the material
B21C 47/34 - Feeding or guiding devices not specially adapted to a particular type of apparatus
4.
ELECTRIC POWER SUPPLY APPARATUS AND METHOD FOR AN ELECTRIC FURNACE
An apparatus (10) for the electric power supply of furnaces (100) for melting and/or heating metal materials provided with electrodes (102) comprises at least one power supply line (201, 20 IL, 20 IM) and at least one connected base module (20, 120, 220) which is configured to convert an alternating mains voltage and current (Ur, Ir) having a mains frequency (ft) into alternating supply voltage and current (Ua, la) with a desired power supply frequency (fa), wherein the at least one base module (20, 120, 220) comprises a transformer (11), a plurality of rectifiers (14) connected to the transformer (11), one or more direct current intermediate circuits (16) configured to store electrical energy, a plurality of inverter devices (15) and a control and command unit (17) configured to control and command the operation of the inverter devices (15) and adjust the power supply frequency (fa). The invention also concerns a method for the electric power supply of furnaces (100) for melting and/or heating metal materials.
A plant for the production of briquettes of direct reduced iron (DRI) comprising: - a feeding line of direct reduced iron (DRI); - at least one briquetting machine (4, 4') for compacting the direct reduced iron (DRI) into briquettes, arranged downstream of said feeding line (1); wherein a carbon dosing device (5, 13), upstream of said at least one briquetting machine (4, 4'), is provided to add carbon into the direct reduced iron (DRI), whereby the carbon is compacted together with the direct reduced iron (DRI) in said at least one briquetting machine (4, 4'); wherein at least one heating device is provided, arranged upstream of said at least one briquetting machine (4, 4'), to heat the carbon; and wherein at least one recovery system (19) is provided, arranged upstream of said at least one briquetting machine (4, 4') to recover volatile substances which may be released from the carbon during heating by means of said at least one heating device.
C21B 13/00 - Making spongy iron or liquid steel, by direct processes
B01J 2/22 - Processes or devices for granulating materials, in generalRendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
B30B 11/00 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses
B30B 11/16 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using pocketed rollers, e.g. two co-operating pocketed rollers
Plant (10) for the continuous casting of metal products comprising a mould (12) in which a metal (L) in the molten state is able to be poured with a determinate flow rate (Q), a regulation device (16) capable of regulating said flow rate (Q), a control unit (18) configured to manage at least the movements of said regulation device (16), and at least one detection device (19) capable of detecting every punctual variation of the level (14) of metal (L) in said mould (12) with respect to a nominal value thereof and generating a corresponding variation signal (SV) and sending it said control unit (18), which is capable of generating a command signal (RS) for said regulation device (16) in order to cause a desired variation of the flow rate (Q). The present invention also concerns the regulation method for generating the above command signal (RS).
A metal strip production plant comprising • - a hot-rolling mill for producing a strip from a cast product; • - a cooling station (2) for cooling the strip, arranged downstream of said hot-rolling mill and provided with a first heat exchanger (22); • - a closed circuit (3) feedable with a first heat-transfer fluid, part of said closed circuit (3) passing through said first heat exchanger (22) for subtracting thermal energy from the strip by heating the first heat-transfer fluid; • - a second heat exchanger (23), cooperating with said closed circuit (3) for transferring thermal energy from said first heat-transfer fluid to a second heat-transfer fluid; • - a further circuit feedable with the second heat-transfer fluid, cooperating with said second heat exchanger (23) and configured to convert at least part of the thermal energy transferred to said second heat-transfer fluid into electric energy and/or to convey at least part of the thermal energy transferred to said second heat- transfer fluid towards at least one user.
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
8.
METHOD FOR PRODUCING STEEL AND CORRESPONDING PLANT
Method and plant (10) for producing steel comprising at least a first step of direct reduction in which, by means of a direct reduction plant (11), the reduction of an iron ore (20) is carried out, so as to obtain a ferrous material (30), and at least a second step of melting only in which, by means of an electric melting furnace (12), the ferrous material (30) is melted, generating a volume of slag (21) and a volume of liquid metal (40), the latter having a carbon percentage content of less than or equal to about 1%.
A rolling roll (10), in particular for long products, comprising a shaft (1) and one or more rolling rings (2a, 2b) mounted on the shaft (1), wherein the shaft (1) and the one or more rolling rings (2a, 2b) are coupled to one another with interference, in particular without mechanical clearances between the shaft (1) and the one or more rolling rings (2a, 2b), and wherein the internal surface (21 a, 21 b) of the one or more rolling rings (2a, 2b) is glued to a surface (11) of the shaft (1); and a method for dismounting the one or more rolling rings (2a, 2b) of the shaft (1) of this rolling roll (10), in which the steps of: a) cooling the shaft (1) by means of a cryogenic fluid, preferably liquid nitrogen, in particular so as to reduce the diameter of the shaft (1); b) removing the one or more rolling rings from the shaft (2a, 2b) are provided.
The invention relates to a vacuum degassing plant including a tank; and connected by a first conduit thereto a filter; and at least one vacuum pump for placing the plant under vacuum and creating a gas stream from the tank to the filter. The plant further includes a dispenser suitable for being fed with powders previously separated by the filter, wherein an outlet of the dispenser is connected to said first conduit. An inlet of the dispenser may be connected by means of a second conduit to a container collecting powders of said filter for feeding the dispenser with these powders. The invention also concerns a process wherein cold inert powders are added to the gases removed from the tank prior to their filtration which derive at least partially from powders separated by the filtration.
A drum cutting device, e.g., for shears adapted to cut flat metal products advancing along a direction substantially parallel to their direction of longitudinal extension, said device being adapted to cut said flat metal products transversely relative to their direction of advancement, wherein said device comprises at least one drum adapted to be rotated and diametrically delimited by a cylindrical surface containing a blade or knife which partially protrudes from said cylindrical surface, wherein said blade or knife is partially housed in a seat of said drum and extends longitudinally along a direction substantially parallel to the rotation axis of said drum, wherein said device comprises an adjustment wedge also housed at least partially in said seat of said drum, wherein the direction of extension of said wedge is substantially parallel to the rotation axis of said drum and the thickness of said wedge transversely to its direction of extension varies continuously along said direction of extension from a minimum thickness to a maximum thickness, wherein said wedge is positioned relative to said blade or knife so that the translation of said wedge parallel to its direction of extension in a first direction of translation results in a peripheral tangential translation of said blade or knife in a first direction of peripheral tangential translation, while the translation of said wedge in a second direction of translation opposite to the first one results in the peripheral tangential translation of said blade or knife in a second direction of peripheral tangential translation opposite to the first one, said device comprising translation means for the translation of said wedge in said two opposite directions of translation.
An apparatus for rolling a metal product includes a first roller and a second roller, both defining at least two rolling channels, and a guide configured to selectively guide the metal product toward one or another of the at least two rolling channels.
B21B 1/18 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling wire or material of like small cross-section in a continuous process
13.
ROLLING MILL STAND WITH ROLL DISTANCE ADJUSTMENT SYSTEM
A rolling mill stand (1) for rolling semi-finished iron-and-steel products, in particular for obtaining long products, comprising at least one pair of rolling rolls (2a 2b), each rolling roll (2a, 2b) being mounted on a respective shaft (3a, 3b); wherein each shaft (3a, 3b) is inserted in a respective eccentric bushing (4a, 4b), each adapted to rotate about a respective rotation axis (A, B), so that a rotation of the eccentric bushings (4a, 4b) allows an adjustment of the distance (G1, G2) between the rolling rolls (2a, 2b); characterized in that it comprises at least two distance sensors (51a, 52a, 51b, 52b) for each shaft (3a, 3b) adapted to detect the distance (c1, c2, c3, c4, d1, d2, d3, d4) between each sensor (51a, 52a, 51b, 52b) and the respective shaft (3a, 3b), or between each sensor (51a, 52a, 51b, 52b) and a body which supports the respective shaft (3a, 3b).
B21B 31/26 - Adjusting eccentrically-mounted roll bearings
B21B 38/10 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
A cleaning plant for hot-rolled metal strips provided with a surface oxide layer, the plant comprising unwinding means for unwinding at least one coil of rolled strip and pickling means for pickling said rolled strip; wherein there are provided measuring means for measuring the thickness of the surface oxide layer, arranged between said unwinding means and said pickling means; and wherein gaseous hydrogen detection means are provided to detect the presence of gaseous hydrogen in fumes produced by said pickling means. A corresponding cleaning method is also claimed.
Apparatus (10) for receiving and unloading bars (50), which are fed by a rolling plant (100) with an initial speed and a nominal length (NL); the apparatus (10) being provided with at least one speed modification unit (11) which is suitable to mechanically actuate a modification of the speed on the bars (50) until a desired release speed thereof is reached, and a rotating unit (12) suitable both to actuate a slowing down by friction on the bars (50) and also to feed a cooling plate (200); the rotating unit (12) comprising at least one rotating member having at least a first braking seating for the bars (50) divided longitudinally between a main portion (17) with a first length (LI) substantially corresponding at least to the nominal length (NL), and at least one additional portion (18), interposed between the speed modification unit (11) and the main portion (17), having a second length (L2) corresponding at least to a range comprised between about 2% and about 15% of the first length (L1).
B21B 43/00 - Cooling beds, whether stationary or movingMeans specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
16.
CONTINUOUS CASTING PLANT FOR A METAL PRODUCT AND RELATED PROCESS
A continuous casting plant for a metal product, comprising: - an ingot mold (1) comprising a crystallizer (7); - a casting curve (2) arranged downstream of the ingot mold (1) and comprising a first group of containment segments (4), by means of which the product passes from a substantially vertical position to a substantially horizontal position; - a straightening system provided in a horizontal stretch of the plant after said casting curve (2) and comprising at least one straightening segment (5), arranged downstream of said first group of containment segments (4); - a second group of containment segments (4') arranged in said horizontal stretch downstream of said at least one straightening segment (5); - a reheating furnace (6) arranged downstream of said second group ofcontainment segments (4'); wherein there is provided a quenching group (3) immediately downstream of said at least one straightening segment (5).
The invention relates to a plant and a process for pre-coating and subsequent digital sol-gel inkjet printing on metallic strips, wherein on the dried ink a protective clear coat will then be applied. The core of the invention lies in the fact that printing is of the sol-gel ink type and pre-coating is no longer carried out by the separate application of two coats, a primer and a base coat, with relative drying and cooling phases of the coats, but by the application of a single coat that combines the functions of primer and base coat. In addition, printing with a special sol-gel type ink that does not require UV treatment, but only a simple drying of the ink after application, simplifies the process even further.
B41M 5/00 - Duplicating or marking methodsSheet materials for use therein
B41J 3/413 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material for metal
B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
B41J 15/04 - Supporting, feeding, or guiding devicesMountings for web rolls or spindles
B41J 15/16 - Means for tensioning or winding the web
A grinding system for grinding a surface of a metal product, in the form of a billet or slab, the system comprising - a grinding wheel (1), adapted to remove in each grinding pass a respective longitudinal portion of a surface layer of the metal product during a relative movement between the metal product and said grinding wheel along a plane; - positioning means (2, 3) for the grinding wheel (1) adapted to keep said grinding wheel (1) in contact with the surface of the metal product during each grinding pass,wherein at least one sensor (4, 4') is provided, adapted to detect the profile of the longitudinal portion of surface layer to be removed during each grinding pass; wherein a control device (5) is provided adapted to memorize said profile and configured to control the positioning means (2, 3) so that the grinding wheel (1),during a subsequent grinding pass for removing a further longitudinal portion of said surface layer which is adjacent to the longitudinal portion removed in the previous grinding pass, moves perpendicularly to said plane to follow said profiled etected in the previous grinding pass.
B21B 38/02 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
B24B 49/10 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
B24B 5/37 - Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
B24B 5/38 - Single-purpose machines or devices for externally grinding travelling elongated stock, e.g. wire
B24B 49/04 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
B24B 49/12 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
B24B 51/00 - Arrangements for automatic control of a series of individual steps in grinding a workpiece
B23Q 15/00 - Automatic control or regulation of feed movement, cutting velocity or position of tool or work
B23Q 17/20 - Arrangements for indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
Apparatus (10) for refining liquid metal (L) comprising: a ladle (11) containing the liquid metal (L) provided with an open upper part (12) and with at least one porous plug (13) on a bottom wall (14) thereof, a removable lid (19, 23), a gas injection line (21) connected to said at least one porous plug (13), and a control unit (27).
An electric power supply apparatus (10) for an electric furnace (11) comprises at least one base power supply module (20, 120, 220) configured to convert electric energy supplied by a three-phase electric network (13) and supply at output at least one pair of single-phase alternating currents and voltages having a desired intensity and frequency, and having at least two sub-modules (21, 21 A-21F), each of which comprises a rectifier device (27), a direct current intermediate circuit (28), and at least one inverter device (29).
H02M 5/44 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
H05B 7/144 - Power supplies specially adapted for heating by electric dischargeAutomatic control of power, e.g. by positioning of electrodes
21.
ELECTRIC POWER SUPPLY APPARATUS FOR AN ELECTRIC ARC FURNACE
An electric power supply apparatus (10) for an electric furnace (11), comprising at least one base power supply module (20, 20 A, 20B) having a first (21), a second (22) and a third sub-module (23), which are respectively connected at input to a three-phase electric network (13) by means of respective transformers (24, 25, 26) and at output to a three-phase power supply line (32) configured to power one or more electrodes (16) of said electric furnace (11).
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
H02M 5/44 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
22.
DEVICE AND METHOD OF CONTROLLING HEAT EXCHANGE IN A CRYSTALLIZER
OUTOUT at the outlet of different channels to identify non-uniformity in the heat exchange during casting. The outlet temperature sensors can be arranged perimetrally on the crystallizer itself or on a separate cover (272; 372a, 372b) that closes a gap (271) between the crystallizer and a relative ingot mould (227). A relative cover with relative kit and relative continuous casting plant and a method for controlling the heat exchange and a use of the device replacing the crystallizers are also described.
The invention relates to a device for unwinding a coil of a metal strip including a bogie translatable back and forth along a guiding system; a blocking system which is arranged on said bogie and which contains a first and a second shaped element, wherein the first shaped element is a roller, preferably an idle roller; an actuating system for modifying the distance between the two shaped elements, for defining an intercepting position and a gripping position of the strip; and an element for detaching the strip from the coil provided on the first shaped element. A relative method of unwinding and inspecting a metal strip is also described, in particular used to check the state of wear of rolling cylinders used for producing the inspected strip.
B21C 47/18 - Unwinding or uncoiling from reels or drums
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
A melting plant includes an electric furnace, provided with one or more electrodes and chemical substance introduction devices, and a management apparatus including a decoupling unit disposed between an electricity grid and the electric furnace. A method for managing the melting plant is also disclosed.
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
F27D 11/08 - Heating by electric discharge, e.g. arc discharge
F27D 99/00 - Subject matter not provided for in other groups of this subclass
25.
REVERSIBLE ROUGHING MILL FOR AN ALUMINUM OR ALUMINUM ALLOY PRODUCT AND RELATED PROCESS
A reversible roughing mill for roughing an aluminum or aluminum alloy product, being fed along a feeding plane, the roughing mill comprising: - a reversible horizontal roughing stand (1); - a first cooling device (10), arranged upstream of said reversible roughing stand (1) configured to cool down, above and below, the product entering the reversible roughing stand (1) by means of a cooling liquid; - a second cooling device (15), arranged downstream of said reversible roughing stand (1) configured to cool down, above and below, the product entering the reversible roughing stand (1) by means of said cooling liquid.
B21B 1/34 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a non-continuous process in reversing mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
26.
SOLID AGGLOMERATED PRODUCT BASED ON IRON OXIDES AND CORRESPONDING PRODUCTION METHOD
Solid agglomerated product, usable as a charge material for an electric arc furnace, comprises at least one fraction of by-product deriving from a steel plant and which comprises a first part containing ferrous oxide FeO and a second part containing ferric oxide Fe2O3, a fraction of solid fuel (CR) containing a quantity of carbon and at least one inorganic binder to agglomerate a fraction of by-product and the fraction of solid fuel with each other and give the agglomerated product the required mechanical properties. The inorganic binder at least partly comprises slag.
The present invention relates to a multi-stand rolling mill for tubular bodies. The rolling mill comprises a first section for rolling on mandrel defined by a first plurality of rolling stands arranged in sequence along a rolling axis. According to the invention, the rolling mill also comprises a second rolling section without mandrel, arranged downstream of said first section, which comprises a second plurality of stands arranged in sequence along said rolling axis. Each stand of said second section comprises three rollers having rotation axes which are arranged at 120° from one another. The rotation axes for each stand are rotated by 180° with respect to corresponding rotation axes of an adjacent stand. According to the invention, at least one stand of said second section comprises a motorized roller having a vertical rotation axis.
Rolling plant (10) and method for producing a strip (P) starting from a slab (50) having a certain starting thickness, comprising at least one walking beam heating furnace (16) configured to heat at least the slab (50) to a starting temperature, and a rolling train (25) operatively disposed in line with at least one roughing stand (23) and configured to reduce the thickness of an intermediate rolled product (51) at exit from the roughing stand (23), until the final strip (P) is obtained; the rolling train (25) comprising at least one pre-finishing stand (26) for obtaining a pre- finished rolled product (52), and a plurality of finishing stands (31) for obtaining the final strip (P); the plant (10) comprising load cells (40) directly associated with the pre-finishing stand (26) for detecting the rolling force applied on the pre- finished rolled product (52), a rapid heating device (28), interposed between the pre-finishing stand (26) and the finishing stands (31), for heating the pre- finished rolled product (52), and a command and control unit (44) connected both to the load cells (40) and also to the rapid heating device (28) and configured at least to selectively activate the latter (28), at least as a function of the rolling force detected by the load cells (40).
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
B21B 38/08 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
29.
PLANT AND METHOD FOR THE PRODUCTION OF FLAT ROLLED PRODUCTS
A rolling plant and method for producing a strip starting from a slab having a certain starting thickness, comprising at least one walking beam heating furnace configured to heat at least the slab to a starting temperature, and a rolling train operatively disposed in line with at least one roughing stand and configured to reduce the thickness of an intermediate rolled product at exit from the roughing stand, until the final strip is obtained; the rolling train comprising at least one pre-finishing stand for obtaining a pre-finished rolled product, and a plurality of finishing stands for obtaining the final strip; the plant comprising load cells directly associated with the pre-finishing stand for detecting the rolling force applied on the pre-finished rolled product, a rapid heating device, interposed between the pre-finishing stand and the finishing stands, for heating the pre-finished rolled product, and a command and control unit connected both to the load cells and also to the rapid heating device and configured at least to selectively activate the latter, at least as a function of the rolling force detected by the load cells.
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
A flow channel has lateral cross-sectional shapes that are circular in a first section, and rectangular in a second section. The flow channel in the first section is continuously connected to the flow channel in the second section. The rectangular shape has a long/short side ratio of 3 or greater and 7 or less. The second section has a cross-sectional area S2, the first section has a cross-sectional area S1, and S2>S1. There are two first openings, which are open, in one-to-one correspondence, in two side faces of the second section. There are two second openings, one of which is open while extending from one side face of the two side faces to a bottom face of the second section, and the other of which is open while extending from another one side face of the two side faces to the bottom face of the second section.
A steel plant comprising - an electric arc furnace (2) suitable for generating fumes, - a capturing system (1) for capturing carbon dioxide from said fumes exiting said electric arc furnace (2); wherein said capturing system (1) comprises - a dedusting and cooling device (10) for dedusting and cooling the fumes coming from said electric arc furnace (2); - a carbon dioxide extraction apparatus (3) arranged downstream of said dedusting and cooling device (2); - at least one intermediate storage device (4) arranged between the dedusting and cooling device (10) and the carbon dioxide extraction apparatus (3), adapted to store the fumes coming from said dedusting and cooling device (10) and configured as a constant pressure container in order to maintain a constant supply flow of the fumes to said carbon dioxide capturing apparatus (3); wherein, downstream of the carbon dioxide extraction apparatus (3), there are provided - at least one filter (8) and one chimney (9) for the emission of fumes treated in said carbon dioxide extraction apparatus (3); - at least one pipe (22) to convey the fumes treated in said carbon dioxide extraction apparatus (3) towards said at least one filter (8) and said chimney (9).
The invention concerns a process and a relative plant for valorizing the slag deriving from the production of steel, in an electric arc furnace. Using the principle of metallothermy, the slag is treated with aluminium and/or silicon scrap, for example from disused photovoltaic cells, to transform the iron oxides and any oxides of other alloying metals of steel respectively into Iron and ferroalloys while converting at the same time aluminium and silicon into respective oxides. In this way, the metals of the steel are recovered from the starting slag and a slag is obtained that can be used preferentially but not only in the production of cement. The process takes place passively, without additional external energy inputs, and preferably at the same time as steel production allowing continuous treatment of the black slag each time it is produced by a steel production cycle.
The invention relates to a water treatment line and a process for removing suspended solids, such as ferrous scale, and in particular also oils and greases, from cooling waters of metallurgical or steel processing. A sedimentation tank is included in which there is a lamellar pack filter with inclined sedimentation surfaces comprising a plurality of adjacent, essentially parallel and inclined tubular profiles, in particular with an angle of inclination with respect to the bottom of said tank of 50-65°. The application of the laminar packs in the tank which separate suspended solids, in particular ferrous scale, by sedimentation avoids the use of sand filters or the like.
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
35.
PLANT AND METHOD FOR PRODUCING FLAT ROLLED PRODUCTS
A plant and a method for producing a final strip starting from a slab having a determinate starting thickness, including: at least one heating furnace configured to heat at least the slab to a determinate starting temperature; at least one reversible roughing stand configured to subject the slab to one or more rolling passes in order to obtain an intermediate rolled product; and a continuous rolling train disposed operatively in line with the roughing stand and configured to reduce the thickness of the intermediate rolled product, until the final strip having a determinate final thickness is obtained.
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
36.
METHOD AND PLANT FOR PRODUCING FLAT ROLLED PRODUCTS
The invention concerns a method and a plant for obtaining strips (S), wherein the plant has at least three casting lines (11, 12, 13) disposed in parallel, of which two are lateral (11, 13) and one is central (12), and at least two rolling lines (14, 15) aligned with two of said at least three lateral casting lines (11, 12 13).
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
An electric power supply apparatus for a direct current user device includes an electric power supply supplying a mains voltage and a mains current and a static power converter to transform a direct electric voltage into a direct electric voltage of a different value. The static power converter is connected to the electric power supply by a respective input connection circuit and to the user device by a respective output connection circuit.
H05B 7/144 - Power supplies specially adapted for heating by electric dischargeAutomatic control of power, e.g. by positioning of electrodes
H02M 3/155 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/04 - Conversion of AC power input into DC power output without possibility of reversal by static converters
38.
METHOD FOR REVAMPING A PLANT FOR PRODUCING FLAT ROLLED PRODUCTS
A method for revamping a starting rolling plant, for producing a final strip starting from a slab having a determinate starting thickness, including: at least one heating furnace configured to heat at least the slab to a determinate starting temperature; at least one reversible roughing stand configured to subject the slab to one or more rolling passes in order to obtain an intermediate rolled product; and a rolling train disposed operatively in line with the roughing stand, including at least one pre-finishing stand and a plurality of finishing stands and configured to reduce the thickness of the intermediate rolled product, until the final strip having a determinate final thickness is obtained.
B21B 1/32 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a non-continuous process in reversing mills, e.g. with intermediate storage reels for accumulating work
B21B 37/16 - Control of thickness, width, diameter or other transverse dimensions
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
39.
METHOD FOR REVAMPING A PLANT FOR PRODUCING FLAT ROLLED PRODUCTS
Method for revamping a starting rolling plant (10, 100), for producing a final strip (P) starting from a slab (50) having a determinate starting thickness, comprising: at least one heating furnace (16) configured to heat at least the slab (50) to a determinate starting temperature; at least one reversible roughing stand (23) configured to subject the slab (50) to one or more rolling passes in order to obtain an intermediate rolled product (51); and a rolling train (25) disposed operatively in line with the roughing stand (23), comprising at least one pre-finishing stand (26) and a plurality of finishing stands (31) and configured to reduce the thickness of the intermediate rolled product (51), until the final strip (P) having a determinate final thickness is obtained.
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
40.
PLANT AND METHOD FOR PRODUCING ROLLED STRIP PRODUCTS
Plant (10) and method for producing a final strip (P) starting from a slab (50) having a determinate starting thickness, comprising: at least one heating furnace (16) configured to heat at least the slab (50) to a determinate starting temperature; at least one reversible roughing stand (23) configured to subject the slab (50) to one or more rolling passes in order to obtain an intermediate rolled product (51); and a continuous rolling train (25) disposed operatively in line with the roughing stand (23) and configured to reduce the thickness of the intermediate rolled product (51), until the final strip (P) having a determinate final thickness is obtained.
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 1/34 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a non-continuous process in reversing mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
An extrusion press (9) for producing a metal extrudate by extruding a billet (90) along an extrusion axis (X) in an extrusion direction (E), the extrusion press (9) comprising - a die holder cassette (1); - a die stack (2) accommodated at least partially in the die holder cassette (1), in particular wherein the die stack (2) comprises an extrusion die (2a); - thrust means (41, 42) adapted to move the die stack (2) parallel to the extrusion axis (X) in direction opposite to the extrusion direction (E); - a body (5) arranged between the thrust means (41, 42) and the die stack (2), provided with a through hole (50) which allows the passage of the metal extrudate through it; - a crosspiece (6) arranged downstream of the die stack (2); - a pressure ring (7) accommodated at least partially in the crosspiece (6); wherein said body (5) is distinct from the pressure ring (7); wherein said body (5) and the die stack (2) are adapted to translate along the extrusion axis (X) with respect to the die holder cassette (1); wherein the thrust means (41, 42) are adapted to push said body (5) to translate it, and said body (5) is adapted to push the die stack (2), transmitting the translation motion imparted by the thrust means (41, 42) to the die stack (2) to translate it parallel to the extrusion axis (X) in said direction opposite to the extrusion direction (E).
A system for coating a metal strip with a layer of molten metal, comprising - a pot (2) containing the molten metal bath; - an annealing furnace (3), arranged upstream of said pot (2), for annealing a strip advancing towards said pot (2); - at least one heating zone (4), arranged upstream of said annealing furnace (3) for preheating the metal strip, or in an intermediate position or end position of said annealing furnace (3) for further heating said strip; - a solar plant (5) for recovering heat from solar radiation; - at least one first conduit (6) adapted to carry a first heat-transfer fluid to convey said heat from said solar plant (5) towards the heating zone (4); - at least one heat exchanger (15, 7, 7') cooperating with said at least one first conduit (6, 6') for recovering heat from said first heat-transfer fluid and heating the metal strip in said at least one heating zone (4, 4').
Mould (10) for the continuous casting of a metal material, having a crystallizer (13) comprising a plurality of plates (11) which define between them a casting channel (12) having a casting direction (X), and wherein at least one of said plates (11) has an internal surface (19) that delimits said casting channel (12) and an external surface (20), apposite said internal surface (19), and on which there are one or more functional grooves (2la) that develop longitudinally and have an overall length (LU) and a width that is not constant along the overall length (LU).
A direct reduction plant (10) for a direct reduction of iron oxides to produce a DRI product, comprising a reactor (11), configured to being loaded with said iron oxides, a reduction circuit (19) fluidically connected to said reactor (11), a hydrogen generator (31) able to generate a make-up gas comprising hydrogen gas and configured to receive hydrocarbons as a feed and generate, in absence of oxidant agents, said make-up gas and a product comprising carbon in solid phase. The product comprising carbon is used, inside an electric arc furnace as required for the desired steel production or is mixed with the DRI product to produce HBI products or CBI products with a controlled quantity of carbon.
Plant (10) for treating flat metal products (50), comprising at least one optical scanning station (11) to scan said metal products (50) and a movement unit (12) to selectively move the metal products (50) as a function of the results of the optical scanning performed.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
The invention is related to a plant for the classification of scrap according to its chemical composition. The plant contains a shear adapted to cut scrap; downstream of the shear an analyser of the chemical composition of the sheared material; means of transport, comprising a plurality of vibrating feeders and conveyors to transport the sheared material to the analyser; and a discharge system adapted to divide the material analysed according to its chemical composition. The shearing in a related method is followed by chemical analysis of the sheared material which allows its division into fractions of sheared scrap with different chemical compositions. The invention helps to optimise the feeding of melting furnaces with different types of scrap which are distinguished, for example, by their copper content.
Torsion guide (10) comprising a support body (11) with which there are associated at least two torsion rollers (12, 13) rotatable around respective parallel rotation axes (T1, T2), distanced with respect to each other at least in a direction of adjustment (B) perpendicular to said rotation axes (T1, T2) and disposed on respective support elements (17, 18).
B21B 39/16 - Guiding, positioning or aligning work immediately before entering or after leaving the pass
B21B 1/16 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling wire or material of like small cross-section
48.
A MONITORING SYSTEM FOR MONITORING PARAMETERS REPRESENTATIVE OF OPERATING CONDITIONS OF AN OIL FILM BEARING
A system for monitoring the parameters representative of operating conditions of an oil film bearing, wherein an oil film is arranged between a static component and at least one rotating component defining an axis, said at least one rotating component being arranged inside said static component, the system comprising
at least one pressure sensor to detect the oil pressure of said oil film;
at least one distance sensor to detect the thickness of said oil film;
at least one temperature sensor to detect the temperature of said oil film;
wherein the at least one pressure sensor, the at least one distance sensor, and the at least one temperature sensor are housed in said at least one rotating component.
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B21B 38/08 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
An apparatus for heating steel products, in particular billets, includes a heating chamber, a plane of advance defined inside the heating chamber and feed and extraction components for the steel products.
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
F27B 9/24 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatmentFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
Solid agglomerated product, such as a briquette (B), which can be used as charge material for an electric arc furnace, comprising at least one by-product fraction (M; M1, M2, M3) deriving from a steel plant and comprising a first part containing ferrous oxide FeO and a second part containing ferric oxide Fe2O3, a solid fuel fraction (CR) containing a quantity of carbon (C_fix) and at least one inorganic binder to agglomerate a by-product fraction (M; M1, M2, M3) and the solid fuel fraction (CR) together and give the required mechanical properties to the agglomerate.
The invention concerns a method and a plant for producing flat rolled products, in order to obtain strips having a multiple crown transverse profile that subsequently have to be divided in a longitudinal direction into strips of a smaller width; the method provides a rolling step carried out in a rolling mill comprising roughing stands and finishing stands equipped with respective work rolls, in order to supply a strip of a determinate width.
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 13/02 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
52.
Metal material containment system in metal product casting
A containment system for laterally containing a liquid metal material or liquid metal alloy at an open side end of a passage defined between two casting members, the system including a pneumatic device ending with a hollow end element adapted to be arranged close to the open side end of the passage, wherein the hollow end element defines a chamber therein, wherein the pneumatic device is adapted to feed a compressed aeriform substance into the chamber, and wherein the hollow end element is provided with at least one blowing face for blowing the compressed aeriform substance from the chamber towards a side containment zone for the liquid metal.
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
53.
HEATING FURNACE FOR A PLANT FOR THE PRODUCTION OF ROLLED PRODUCTS
Heating furnace (10) for a plant (100) for the production of rolled products (P), wherein the heating furnace (10) comprises a tunnel (11) and a plurality of heating means (20). The heating means (20) comprise electrically powered heating elements (23, 24, 25).
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
54.
PROCESS AND APPARATUS FOR PRODUCING METALLURGICAL PRODUCTS, IN PARTICULAR OF THE MERCHANT TYPE, IN PARTICULAR IN AN ENDLESS MODE
A process for producing metallurgical products, in particular at least of the merchant type,
in which there are provided the steps of:
a) producing a long casting product by means of a continuous casting machine;
b) rolling said long casting product by means of a rolling mill comprising a plurality of rolling stand groups;
wherein during step b), said long casting product is heated by first heating means exclusively arranged between one pair of consecutive rolling stand groups;
wherein said first heating means are the only heating means between the rolling stand groups of the rolling mill; and an apparatus adapted to perform the aforesaid process.
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 1/18 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling wire or material of like small cross-section in a continuous process
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
55.
REDUCER AND/OR CALIBRATING ROLLING MILL FOR ROD-SHAPED BODIES
A stretch reducer and/or calibrating rolling mill for rod-shaped bodies, in particular tubular bodies, in particular hollow bodies, said rolling mill comprising a plurality of rolling stands each comprising a plurality of rolling rollers mutually arranged so as to define a passage for said rod-shaped bodies, wherein said rolling stands are arranged in sequence along a rolling direction so that the respective passages are substantially aligned to define a rolling path substantially parallel to said rolling direction, wherein each of at least two of said rolling stands comprises three rolling rollers.
B21B 35/02 - Drives for metal-rolling mills for continuously-operating mills
B21B 17/14 - Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel
B21B 13/10 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
B21B 13/00 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
B21B 1/18 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling wire or material of like small cross-section in a continuous process
56.
FRONT LOADING EXTRUSION PRESS FOR PRODUCING METAL EXTRUDATES BY EXTRUDING A BILLET
An extrusion press for producing metal items by extruding a metal billet, said press comprising an extrusion die and a main cylinder including an extrusion punch adapted to be translated in two opposite directions, wherein the translation of said extrusion punch in a first extrusion direction results in a push against said billet and in the extrusion of said billet through said extrusion die, said press comprising a container and a movable punch holder crosspiece, both being translatable in two opposite directions parallel to the translation directions of said extrusion punch, wherein said container is adapted to be translated by means of at least a first dedicated cylinder including a first dedicated rod rigidly fastened to said container, and wherein said container is adapted to be moved close to said extrusion die by means of said dedicated first cylinder and rod so as to contain said billet.
A welding machine, preferably of the flash welding type, designed to facilitate maintenance of the clamping means (3, 4, 6, 7), e.g. clamps, of the two longitudinal metal products to be welded. Advantageously, a first structure (2) provided with first clamping means (3, 4) and a second structure (5) provided with second clamping means (6, 7) are supported in a first part (10) of the carriage (1) delimited by a first beam (9) and a second beam (8) of the carriage (1) that are parallel to the feeding direction X, while the at least one transformer (36) is fixed to the carriage (1) and supported in a second part (11) of the carriage (1) arranged laterally outside the first part (10). Moreover, the two upsetting cylinders (23, 24) are arranged along a plane Y inclined by an acute angle different from zero relative to a horizontal plane and passing through a passage zone of the longitudinal metal products along a feeding direction X.
B21B 15/00 - Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
Continuous casting apparatus, comprising a mold and a crystallizer for the continuous casting of a metal product. The mold is provided with primary cooling means using a cooling fluid and associated with the walls of the crystallizer. A plurality of cooling members is installed downstream of the mold to perform a secondary cooling of the product, said cooling members comprising a plurality of delivery nozzles configured to deliver a liquid for cooling the product.
Cooling device suitable to be used in an electric melting furnace (30), or suchlike, in cooperation with the lateral wall of said electric furnace (30) and comprising at least one pair of cooling panels (11a, 11b, 12a, 12b) each provided with a plurality of cooling tubes (13, 14, 15, 16); the electric furnace (30) comprises at the lower part at least one shell (17) to contain the molten metal bath (18) and a jacket (19) above it, in which said cooling panels (11a, 11b, 12a, 12b) are positioned; the tubes (13, 14, 15, 16) provided in the panels (11a, 11b, 12a, 12b) are interspersed with free spaces (20, 21, 22, 23), in such a way that at least in the proximity of any one free space (20, 21, 22, 23) of one panel (11a, 11b, 12a, 12b) there is positioned at least one tube (13, 14, 15, 16) of another panel (11a, 11b, 12a, 12b), and in such a way that substantially the tubes (13, 15) comprised in one panel (11a, 11b) are offset from the tubes (14, 16) comprised in the other panel (12a, 12b),
The invention relates to a system for changing the hammers of a shredder including a shredder with one or more covers and a rotating drum equipped with a plurality of hammers; a lifting system suitable to move said hammers and a control unit which controls both the opening of the shredder and the movements of the lifting system and preferably also the unlocking/locking of the hammers from/on the drum to allow their replacement. The system can be managed hydraulically with a single hydraulic supply. It is included to be able to control the system remotely or to include its automation according to a maintenance plan. A relative method for changing the hammers of a shredder is also disclosed.
Method for supplying electric energy in a steel plant (20), comprising at least a furnace (12) for melting metal material and one or more user devices (17, 18, 19) that use the metal material obtained from said at least one furnace (12) which are electrically powered by means of power supply means (13) comprising at least one transformer (14) connected to an electric network (15) and a power supply system (16) located downstream of the transformer (14).
H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
H02J 3/28 - Arrangements for balancing the load in a network by storage of energy
62.
AN ANNEALING APPARATUS FOR A METAL STRIP COATING SYSTEM
An annealing apparatus for a metal strip (9) advancing along a longitudinal direction into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising, in sequence: - at least one longitudinal-flow induction heating device (10); - at least one transverse-flow induction heating device (12); - at least one cooling zone.
and wherein the second elastic bars are inclined by a second acute angle, different from said first acute angle, with respect to said horizontal plane.
Metallurgical plant (10) for treating steelworks by-products, comprising at least one smelting furnace (11) configured to reduce and smelt the reducible metal oxides present in the by-products, generating fumes (F), and an apparatus (12) associated with the smelting furnace (11) to treat said fumes (F). In particular, the apparatus (12) comprises static means for extracting and separating zinc oxide (ZnO) from the fumes (F).
Method to produce metal strip that comprises the casting of a cast product through a casting machine provided with a crystallizer to obtain a slab, and the hot rolling of the slab in a rolling station to obtain metal strip. The casting machine, during casting, exerts an action of reducing the thickness of the cast product exiting the crystallizer.
An extrusion press for producing metal extrudates by extruding a billet (27), the extrusion press comprising: - a punch holder crosspiece (20) which carries a punch (21) and is adapted to be translated in two opposite senses of translation along a first extrusion direction (X); - a billet holder loader (24) adapted to be alternately positioned between a resting position and a loading position; wherein said punch holder crosspiece (20) is translatable along a second direction (Y), perpendicular to said first extrusion direction (X), between a first position thereof and a second position thereof; wherein when the billet holder loader (24) is in said resting position and said punch holder crosspiece (20) is in the first position thereof, the translation of the punch holder crosspiece (20) along said first extrusion direction (X) in a first sense of translation, or sense of extrusion, causes a push by said punch (21) against said billet (27) and the extrusion of said billet (27); characterized in that said extrusion press comprises restraining means (40, 41) adapted to mutually restrain said punch holder crosspiece (20) and said billet holder loader (24); and in that when the punch holder crosspiece (20) is in the first position, it is restrained to the billet holder loader (24) by means of said restraining means (40, 41) so that the translation of said punch holder crosspiece (20) from the first position to the second position causes the movement of the billet holder loader (24) from said resting position to said loading position.
A soft reduction segment (1) of a continuous casting machine, said segment being suitable for carrying out a soft reduction of a slab exiting from said continuous casting machine, the segment comprising - an upper support (2) for supporting upper rollers; - a lower support (3) for supporting lower rollers; - adjustment units having pairs of actuators arranged to adjust a relative inclination between the upper support (2) and the lower support (3) and, thus, between the upper rollers and the lower rollers; wherein the upper support (2) is divided into a first part (21), which is proximal to the slab run-in end, and a second part (22), which is proximal to the slab run-out end, said first part (21) and said second part (22) being connected to each other by at least one first hinge (4).
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
B22D 11/128 - Accessories for subsequent treating or working cast stock in situ for removing
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
68.
INDUSTRIAL PLANT AND SYSTEM AND METHOD TO POWER AN INDUSTRIAL PLANT
An industrial plant for treating materials includes one or more lines for treating materials and one or more user devices and a system for supplying electrical energy. The power supply system includes a power supply circuit disposed in a site of the plant connected to the latter, and configured to supply electrical energy to said one or more user devices. A method to supply electrical energy to the plant is also disclosed.
Scrap charging device (80) to charge scrap (90) in a crucible (81) of a vacuum-melting apparatus (8), said scrap (90) being bound with a wire (9); the device (80) comprising - a first tubular body (1) defining a vertical axis (Y); - a second tubular body (2) arranged coaxially inside or outside said first tubular body (1); - first actuating means (41) adapted to translate the first tubular body (1) and the second tubular body (2) along said vertical axis (Y); - second actuating means (42) adapted to rotate the second tubular body (2) with respect to the first tubular body (1) or vice versa, about said vertical axis (Y); wherein the lower end (19) of the wall (10) of the first tubular body (1) has at least one opening (11a, 11b) shaped so that said lower end (19) has at least one protrusion (12a, 12b) along said at least one opening (11a, 11b), so that the wire (9) which bounds the scrap (90) can pass through said at least one opening (11a, 11b) and be suspended on said at least one protrusion (12a, 12b); wherein the lower end (29) of the wall (20) of the second tubular body (2) has at least one opening (21a, 21b); wherein the device (80), according to the angular position of the second tubular body (2) with respect the first tubular body (1), can take a loading position which allows to pass the wire (9) through said at least one opening (11a, 11b) of the first tubular body (1) and through said at least one opening (21a, 21b) of the second tubular body (2), and which allows to suspend the wire (9) on said at least one protrusion (12a, 12b); and wherein said second tubular body (2) is adapted to be rotated, in a first direction of rotation, from said loading position to a locking position, wherein the wall (20) of the second tubular body (2) at least partially obstructs the opening (11a, 11b) of the first tubular body (1) so as to prevent the wire (9) suspended on the protrusion (12a, 12b) from leaving said at least one protrusion (12a, 12b); and is adapted to be rotated in a second direction of rotation, opposite to the first direction of rotation, from said locking position to a release position allowing the release of the wire (9) from said at least one protrusion (12a, 12b).
Apparatus (10) for feeding and cutting a metal product (P) conformed into loops comprising at least a first, a second and a third conveyor (11, 12, 13) which are aligned, partly overlapping in succession and provided with a respective first, second and third feed plane (14, 15, 16), and a control unit (23) configured at least to control the actuation of said first, second and third feed plane (14, 15, 16) with the purpose of guaranteeing a desired feed speed of said metal product (P). The present invention also concerns the corresponding method for feeding and cutting said metal product.
Electric power supply apparatus in an industrial plant (20) for treating materials, wherein the plant (20) comprises one or more lines (11, 21) for treating the materials and one or more user devices (17, 18, 19) powered with alternating current by power supply means (13) comprising at least one transformer (14) connected to a mains power network (15) and a power supply system (16) located downstream of the transformer (14).
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
An apparatus for the thermal heating of steel products that includes inside it a path for feeding the steel items which extends between an entry end and an exit end of the steel items, a mechanism for feeding a fuel, and a mechanism for feeding a comburent including oxygen, and burners able to operate the combustion of the fuel and of the comburent.
F27B 9/10 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and chargeFurnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity electrically heated heated by hot air or gas
F27D 99/00 - Subject matter not provided for in other groups of this subclass
Control method for an industrial plant including the acquisition of a plurality of measurement data relating to the components of a plant and/or to a product being worked, their storage in a storage device and simultaneously their transmission to an automation system which uses said measurement data to generate respective control signals.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
74.
WEIGHING DEVICE, AUTOMATIC SYSTEM TO CONTROL THE FEED OF CHARGE MATERIAL INTO A FURNACE, APPARATUS THAT USES THE SYSTEM AND CORRESPONDING METHOD
Weighing device for charge material fed into an electric arc furnace, which comprises a plurality of supports each comprising an upper plate, a lower plate and a weighing element in contact with and disposed between said two plates, wherein at least one of said weighing elements is a column load cell, and wherein each support comprises two connection elements perpendicular to each other, each having a tie rod connected to at least one upper terminal for connection to the upper plate and to at least one lower terminal for connection to the lower plate.
G01G 3/12 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
C21C 5/52 - Manufacture of steel in electric furnaces
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
G01G 21/23 - Support or suspension of weighing platforms
75.
APPARATUS FOR INSPECTING AND/OR RESTORING A HOSTILE ENVIRONMENT AND CORRESPONDING METHOD
The invention concerns a method for inspecting and restoring a hostile and/or dangerous environment performed by an apparatus. The method comprises the steps of determining whether to start the inspection of said hostile environment by means of at least one temperature detection device; performing the inspection by acquiring optical and/or thermal and/or geometric data of at least one zone of the frameable environment, by means of at least one optical and/or thermal and/or geometric data detection device; performing the restoration of said hostile environment by means of said at least one restoration operator device by positioning, by means of the positioning support, the tool head inside said environment through said inlet channel. The invention also concerns an apparatus for executing said method.
The invention concerns a method for tracking metal elements (EM) obtained in a process for working metal products (PM) which provides to detect reference images (RI) and subsequent images (I) of the metal elements (EM) and compare them in order to identify a specific metal element (EM). The invention also concerns an apparatus (10) for tracking metal elements (EM) and a plant for working metal products (PM).
Feed apparatus (10) for feeding a metal charge (C) toward a melting furnace (100), wherein the apparatus (10) comprises a conveying channel (11) and a fixed hood (12) which is configured to hermetically close the upper part of the conveying channel (1 1) in such a way as to define an internal tunnel (13) having a longitudinal axis (X) and extending from an inlet end (15) for the introduction of the metal charge (C) to an outlet end (16) configured to be disposed adjacent to the melting furnace (100).
The invention concerns a steel plant for the production of long or flat products with a treatment circuit of water deriving from direct cooling and a relative process that envisage that the cooling waters coming from first machinery (10, 12; 86, 88; 134, 136, 138; 224, 226, 228) that produce cooling waters less loaded with scale (with a low content of suspended solids), as quenching units (138), directly feed second machinery (36, 38, 42; 90, 92; 166, 168; 186, 188, 190) producing cooling waters rich in scale, such as rolling mills (92; 36, 38, 166, 168), preferably by first passing through at least one collecting tank (13; 122, 164; 230) to then be treated in a succession of water treatment devices such as scale pits (44; 94; 194), clarifiers (76; 102; 200), filters (50; 210, 211 ) and cooling towers (52; 112; 212, 213 ) to feed the first machinery again.
C02F 9/00 - Multistage treatment of water, waste water or sewage
C02F 103/02 - Non-contaminated water, e.g. for industrial water supply
C02F 103/16 - Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C02F 1/00 - Treatment of water, waste water, or sewage
C02F 1/40 - Devices for separating or removing fatty or oily substances or similar floating material
C02F 1/48 - Treatment of water, waste water, or sewage with magnetic or electric fields
B22D 11/22 - Controlling or regulating processes or operations for cooling cast stock or mould
F27D 9/00 - Cooling of furnaces or of charges therein
09 - Scientific and electric apparatus and instruments
Goods & Services
Electric regulating apparatus in the nature of voltage regulators for electric power, for machines for the metallurgical industry, machines for the steelmaking industry, machines for rolling metals; Electronic regulators being parts of machines for electrical motors and generators, for machines for the metallurgical industry, machines for the steelmaking industry, machines for rolling metals; Electric control panels for machines for the metallurgical industry, machines for the steelmaking industry, machines for rolling metals; Automation relay panels for machines for the metallurgical industry, machines for the steelmaking industry, machines for rolling metals; Process controllers and programming units for machines for the metallurgical industry, machines for the steelmaking industry, machines for rolling metals; Weighing, measuring, signalling and checking (supervision) apparatus and instruments; Data processing equipment and data processing computers for the metallurgical industry and for the steelmaking industry; Computer programs recorded on data carriers, for controlling or regulating machines for the metallurgical industry, machines for the steelmaking industry, machines for rolling metals.
A drawing bench of a drawing machine comprising a drawing carriage which is translatable along a predetermined direction on a base structure; a rack-pinion system adapted to translate the drawing carriage along said predetermined direction on the base structure;
wherein the rack-pinion system comprises at least two motors; at least two pinions and one or more racks;
and wherein each motor is adapted to drive a respective pinion.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Installations [machines] for treatment of ore dust; direct
reduction iron manufacturing installations [machines]; steel
manufacturing installations [metalworking machines];
continuous casting machines; processing and agglomerating
installations [machines] iron ores and non-ferrous ores,
coal, lime, dolomite, magnesite and cryolite; installations
[machines] for the combustion of minerals; sintering
machines for chemical processing; industrial washing
machines for steel works; thermal power generating plants;
machines and installations for the manufacture of refractory
moldings, for briquetting, palletizing and granulating;
mixers for pig iron, steel, alloys and slag; converters for
the production of steel and iron alloys; blasting and
thermic lances [machines] for steel works; waste gas
collection and extraction equipment for steel works;
mechanical spreaders for pig iron and steel; continuous
casting machines; machines for rolling and cropping steel,
iron alloys and nonferrous metals; hot and cold rolling
installations [machines] for sheets, strips, profile
sections, beams, rails, pipes and wire; rolling machines for
rolling steel, copper or other metallic or ceramic
materials; roll stands; welding machines; machines and
installations for surface finishing of metals; galvanizing
and coating installations; scarfing and hardening machines;
electric shears and saws, in particular for separating bars,
sheets, strips, profile sections, beams, rails, pipes and
wire; coiling machines for metal strips; machine tools;
lathes; drills; hydraulic motors; turbines, namely water,
gas and steam turbines and turbine components; shut-off
devices and rotational speed regulators for turbines;
turbine wheels; turbine guide vanes; rack cleaning machines;
lifting and lowering work platforms; cranes; transporting
and conveying machines; conveyor belts; bucket conveyors;
screw conveyors; winches; capstans and cable pulleys for
machines; apparatus and machines for the manufacture of
clinker ballast, granulate, bricks, plates and moldings from
steel work slag; machines and installations for the
processing and recovery of waste materials; dust removing
equipment for cleaning purposes; cyclones; generators, in
particular tubular turbine generators, hydrodynamic
generators, motor generators and turbo-generators;
three-phase AC motors; AC motors; DC motors; hydraulic power
generating plants; gas and steam power generating plants;
combined cycle power generating plants; cogeneration power
generating plants; environmental technology installations,
in particular, biomass treatment equipment and composting
plants, electrical drives for machines, all the aforesaid
goods as machines or machine parts. Regulating apparatus, electric; measuring devices, electric;
computer software applications, downloadable; electric
regulating apparatus in the nature of voltage regulators for
electric power; electric control panels; electrical
substations, namely, electrical distribution installations
and electrical control apparatus and instruments for
electrical power distribution; electricity measuring
instruments, namely electricity meters or electricity meter
readers; electric transformers; all the above goods only
related to the metals industry, electrical installations and
devices, electrical measuring, open and closed-loop control
and monitoring equipment (not included in other classes);
electric control instruments, equipment and apparatus for
industrial installations, power generating plants,
environmental technology installations, transport and
conveying equipment; electrical transformers and coils;
electric accumulators; batteries; gas-insulated electrical
switches; electric protection and regulation devices (not
included in other classes); electric power supply components
and installations (not included in other classes);
electrical low, medium and high voltage installations and
switchgear; rectifiers; converters; inverters;
current-source DC-link converters; voltage-source DC-link
converters; frequency converters; overhead power
transmission lines; contact lines for railway rolling stock;
electrical conductors, in particular braided or covered
wire; data processing equipment and apparatus for open and
closed-loop control, simulation, visualization and
monitoring of parameters in industrial installations,
environmental installations, power generation; electric
distribution and transmission installations, and machines
and parts thereof; computer programs for open and
closed-loop process control, process visualization and
process monitoring in industrial installations,
environmental installations, power generating plants and
machines and parts thereof; computer programs for the
simulation and visualization of industrial installations, in
particular metallurgical installations, environmental
technology installations, power generating plants, machines
and devices; personal computers, minicomputers,
microcomputers, computer screens, input keyboards and mice
for computers, printers, modems, all the aforesaid goods for
open and closed-loop control, simulation, visualization and
monitoring of parameters in industrial installations,
environmental installations, power generation, distribution
and transmission installations, and machines and parts
thereof; volatile and non-volatile semiconductor memories,
storage discs, diskette drives, optical fibers, programmed
and non-programmed data carriers, data transmission
installations (not included in other classes), all the
aforesaid goods for open and closed-loop control,
simulation, visualization and monitoring of parameters in
industrial installations, environmental installations, power
generation, distribution and transmission installations, and
machines and parts thereof; electronic components, namely
for integrated circuits and printed circuits for use in
industrial installations, environmental installations, power
generation, distribution and transmission installations, and
machines and parts thereof. Consultancy in the field of energy-saving, only related to
the metals industry; technical consultancy, planning,
compilation of technical project and profitability studies
for industrial installations, power generating plants and
environmental technology installations; scientific and
industrial research and development, technical planning and
design engineering for mining and steel works installations,
machines, bridges, cranes and pipelines; drawing up of
technical process models for industrial installations, power
generating plants and environmental technology
installations; technical planning and consultancy in the
field of data processing for industrial installations,
metallurgical installations, environmental installations,
power generation, distribution and transmission
installations, and machines; technical project planning and
EDP [electronic data processing] system solutions for
financing, logistics, engineering and production; creation
of computer programs for data processing systems for the
purpose of open and closed-loop control, simulation,
visualization and monitoring of parameters in industrial
installations, environmental installations, power
generation, distribution and transmission installations, and
machines and parts thereof; technical project planning of
data networks for industrial installations, metallurgical
installations, environmental installations, power
generation, distribution and transmission installations, and
machines and parts thereof; technical planning and design
engineering of electric installations; technical
consultancy, except for business consultancy, on system
selection and design for industrial installations,
environmental technology installations, power generating
plants.
82.
METHOD TO SUPPLY ELECTRIC POWER TO FURNACES FOR MELTING AND/OR HAETING METAL MATERIALS, AND CORRESPONDING APPARATUS
The invention concerns a method to supply electric power to furnaces (100) for melting and/or heating metal materials (M), which provides the supply of a mains voltage (Ur) and a mains cunent (Ir), both having a predefined mains frequency (fir); the transformation of said mains voltage (Ur) and mains current (Ir) into selectively settable alternating secondary voltage (Us) and secondary current (Is); the rectifying of said secondary voltage (Us) and secondary current (Is) and the conversion of the direct intermediate voltage (Ui) and intermediate current (li) into selectively settable alternating supply voltage (Ua) and supply current (la); the feeding of said supply voltage (Ua) and supply current (la) to a plurality of electrodes (102) of the furnace (100). The invention also concerns an apparatus ( 10) for supplying electric power to furnaces ( 100) for melting and/or heating metal materials (M).
The invention refers to a distributor tube (400) for cooling metal or similar products, in particular steel strips, comprising along the longitudinal extension of said distributor tube (400), a plurality of outlet openings (406) through which a cooling fluid can be ejected; an inlet (402) and a closure (404) of said tube at its ends; a connection for connecting a source of cooling fluid and feeding said distributor tube (400) with said fluid. At least on the inlet side (402) there is a zone of change in the diameter of the tube, which varies from a sector with a smaller diameter, followed in the direction of flow by a sector with a larger diameter. Upstream of said plurality of outlet openings (406) there is an orifice (414) in the area of the flow section. Further described are a corresponding hot-rolling plant and a use of the distributor tube.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
84.
A PROCESS FOR MANUFACTURING COMPACT COILS OF ULTRA-FINE GRAINED, MARTENSITE-FREE STEEL BARS
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
b) performing at least one first cooling stage so that the steel bar has a surface temperature higher than the martensite start temperature, and performing at least one first equalization stage in air;
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
b) performing at least one first cooling stage so that the steel bar has a surface temperature higher than the martensite start temperature, and performing at least one first equalization stage in air;
c) rolling the steel bar by means of at least one intermediate rolling mill;
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
b) performing at least one first cooling stage so that the steel bar has a surface temperature higher than the martensite start temperature, and performing at least one first equalization stage in air;
c) rolling the steel bar by means of at least one intermediate rolling mill;
d) performing at least one second cooling stage always maintaining the surface temperature higher than the martensite start temperature, and performing at least one second equalization stage in air;
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
b) performing at least one first cooling stage so that the steel bar has a surface temperature higher than the martensite start temperature, and performing at least one first equalization stage in air;
c) rolling the steel bar by means of at least one intermediate rolling mill;
d) performing at least one second cooling stage always maintaining the surface temperature higher than the martensite start temperature, and performing at least one second equalization stage in air;
e) rolling the steel bar by means of a finishing rolling mill in a non-recrystallization temperature range, maintaining the whole cross-section of the steel bar within said non-recrystallization temperature range, and with a total reduction between 25 and 50% with respect to the cross-section of the steel bar at the entry of the finishing rolling mill, in order to obtain an ultra-fine-grained austenitic matrix;
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
b) performing at least one first cooling stage so that the steel bar has a surface temperature higher than the martensite start temperature, and performing at least one first equalization stage in air;
c) rolling the steel bar by means of at least one intermediate rolling mill;
d) performing at least one second cooling stage always maintaining the surface temperature higher than the martensite start temperature, and performing at least one second equalization stage in air;
e) rolling the steel bar by means of a finishing rolling mill in a non-recrystallization temperature range, maintaining the whole cross-section of the steel bar within said non-recrystallization temperature range, and with a total reduction between 25 and 50% with respect to the cross-section of the steel bar at the entry of the finishing rolling mill, in order to obtain an ultra-fine-grained austenitic matrix;
f) winding the steel bar in a compact coil, by means at least one spooling device, so that the ultra-fine-grained austenitic matrix transforms in a mixture of ferrite and pearlite.
A process for manufacturing compact coils of ultra-fine grained, martensite-free steel bars, the process comprising the following stages:
a) rolling a steel billet by means of a roughing rolling mill producing a steel bar;
b) performing at least one first cooling stage so that the steel bar has a surface temperature higher than the martensite start temperature, and performing at least one first equalization stage in air;
c) rolling the steel bar by means of at least one intermediate rolling mill;
d) performing at least one second cooling stage always maintaining the surface temperature higher than the martensite start temperature, and performing at least one second equalization stage in air;
e) rolling the steel bar by means of a finishing rolling mill in a non-recrystallization temperature range, maintaining the whole cross-section of the steel bar within said non-recrystallization temperature range, and with a total reduction between 25 and 50% with respect to the cross-section of the steel bar at the entry of the finishing rolling mill, in order to obtain an ultra-fine-grained austenitic matrix;
f) winding the steel bar in a compact coil, by means at least one spooling device, so that the ultra-fine-grained austenitic matrix transforms in a mixture of ferrite and pearlite.
After the winding operation is completed, the compact coil can be transferred to a storage area through a transferring device, for example a walking beam, where a natural or forced or retarded cooling is applied to the coil.
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
only one sink roll, arranged downstream of said bridle roll and inside a tank adapted to contain a bath of said molten metal;
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
only one sink roll, arranged downstream of said bridle roll and inside a tank adapted to contain a bath of said molten metal;
a correction device for correcting the planarity of the metal strip arranged between said bridle roll and said sink roll;
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
only one sink roll, arranged downstream of said bridle roll and inside a tank adapted to contain a bath of said molten metal;
a correction device for correcting the planarity of the metal strip arranged between said bridle roll and said sink roll;
wherein said correction device comprises at least two motorized rolls;
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
only one sink roll, arranged downstream of said bridle roll and inside a tank adapted to contain a bath of said molten metal;
a correction device for correcting the planarity of the metal strip arranged between said bridle roll and said sink roll;
wherein said correction device comprises at least two motorized rolls;
wherein a first motorized roll of said at least two motorized rolls is distal from said bridle roll in a fixed position with respect to a feeding path of the metal strip, said first motorized roll being arranged on a first side of said feeding path;
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
only one sink roll, arranged downstream of said bridle roll and inside a tank adapted to contain a bath of said molten metal;
a correction device for correcting the planarity of the metal strip arranged between said bridle roll and said sink roll;
wherein said correction device comprises at least two motorized rolls;
wherein a first motorized roll of said at least two motorized rolls is distal from said bridle roll in a fixed position with respect to a feeding path of the metal strip, said first motorized roll being arranged on a first side of said feeding path;
wherein said bridle roll is also arranged on said first side;
A correction apparatus for correcting the planarity of a metal strip advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising
a bridle roll, which modifies the feeding direction of the metal strip exiting an annealing furnace;
only one sink roll, arranged downstream of said bridle roll and inside a tank adapted to contain a bath of said molten metal;
a correction device for correcting the planarity of the metal strip arranged between said bridle roll and said sink roll;
wherein said correction device comprises at least two motorized rolls;
wherein a first motorized roll of said at least two motorized rolls is distal from said bridle roll in a fixed position with respect to a feeding path of the metal strip, said first motorized roll being arranged on a first side of said feeding path;
wherein said bridle roll is also arranged on said first side;
and wherein a second motorized roll of said at least two motorized rolls is proximal to said bridle roll and movable along the direction of the strip thickness, said second motorized roll being arranged on a second side, opposite to the first side, of said feeding path.
An inspection apparatus for melting furnaces that can be used in the steel industry, includes an inspection head and a positioning support, said inspection head including a rotating table. Said inspection head includes one or more image detection devices attached on said rotating table and which rotate in a manner integral with it. Said positioning support is suitable for the insertion of the inspection head into said melting furnace through an inlet aperture of the melting furnace. Also disclosed is an inspection method for melting furnaces that can be used in the steel industry, by means of an inspection apparatus.
H04N 23/45 - Cameras or camera modules comprising electronic image sensorsControl thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
87.
ARRANGEMENT AND PROCESS FOR THE CONSTRUCTION OF A STEEL PLANT AND RELATED STEEL PLANT
The invention relates to an arrangement, in particular a construction site, and a process for the construction of a steel plant for the production of long or flat products and a related steel plant which includes its subdivision into areas of greater (H) or lesser load (L), wherein the loads of the area of lesser load (L) (< 1.5 tons/m2) are placed on a raised plancher made of columns (24, 24a, 24b, 24c) and slabs (20) which have been prefabricated simultaneously with the construction of the building (26), which houses the production line of the steel plant, and the areas of greater load in a zone (PF; PC, C) which is preferably covered, adjacent to the construction zone of the building (26) which includes a reinforcement production zone (6; 106), a casting zone (8; 108); and a curing zone. The post-tensioning technique of slabs is applied. The invention allows to speed up the construction of the steel plant.
The present invention provides a reduction system and method that can be operated with any proportion of gaseous hydrogen-containing gases and gaseous hydrocarbon-containing gases having the possibility of continuing its operation, ensuring an high process availability and negligible loss of production, when the gaseous hydrogen-containing gas for any reason is not available and allow the substitution of the gaseous hydrogen-containing gas with a gaseous hydrocarbon-containing gas with minor adjustments in the plant operation. The reduction system of the invention is designed to be implemented in new and already built direct reduction plants to operate efficiently and has lower capital and operation costs.
Embodiments concern a plant for melting and/or heating metal material and a corresponding method to supply electrical energy. The plant comprises at least one induction furnace (11) and means (12) for supplying electrical energy to the induction furnace 11), wherein the electric power supply means (12) comprise at least one transformer (13) connected to an alternating current mains power network (14), at least one rectifier (15) located downstream of the transformer (13), at least one converter (16) located downstream of the rectifier device (15), and at least one coil (17) for melting and/or heating metal material.
G05B 19/4155 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by programme execution, i.e. part programme or machine function execution, e.g. selection of a programme
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
Steel production plant to obtain long products such as rods, bars or sections, with overall productivity comprised between 0.7-3.0 Mton/year, preferably between 1.0 and 3.0 Mton/year, comprising at least two co-rolling lines (11a, 11b).
Secondary cooling apparatus in a machine for continuous casting of metal products, such that each metal product is cast, contained and guided along an axis of movement. The secondary cooling apparatus includes a plurality of cooling assemblies disposed in sequence one to the other along the continuous casting machine. Each assembly includes a plurality of cooling units each provided with one or more nozzles disposed along the axis of movement. The cooling units of each assembly are adjacent to each other to cover a width at least equal to the maximum width of the metal product which can be cast in the continuous casting machine.
Rolling method to produce a metal strip (P) in coil-to-coil, semi-endless or endless mode, in a rolling plant (10) comprising: - a continuous casting device (11) to produce slabs; - a furnace (16) configured to maintain the slabs at a certain temperature and/or to heat the slabs; - at least one roughing stand (25) to reduce the thickness of the slabs and obtain an intermediate rolled product; - a plurality of finishing stands (31) to reduce the thickness of the intermediate rolled product and obtain the strip (P); - a rapid heating device (28) interposed between the at least one roughing stand (25) and the plurality of finishing stands (31) to heat the intermediate rolled product in each operating mode, so that the temperature of the strip (P) in correspondence with the outlet of the last finishing stand (31) is comprised between 830 °C and 860 °C.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
93.
ELECTRIC ARC FURNACE FOR MELTING METAL MATERIAL AND STEEL PLANT COMPRISING SAID ELECTRIC ARC FURNACE
Electric arc furnace (10) usable for melting a metal charge (M) and comprising a container (11) having at least one perimeter wall (20) in which there are an upper aperture (21), a lateral slagging aperture (22) and a lateral feed aperture (43). A roof (15), able to be opened selectively, can be positioned on the upper aperture (21) of the container (11) and is provided with a central part (30) having one or more through holes (31) into which respective electrodes (32) can be inserted with clearance to melt the metal charge (M).
C21C 5/52 - Manufacture of steel in electric furnaces
F27D 99/00 - Subject matter not provided for in other groups of this subclass
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
Method to control a secondary cooling apparatus in a machine for continuous casting of metal products and secondary cooling apparatus for a continuous casting machine
A method to control a secondary cooling apparatus in a machine for continuous casting of metal products is provided. The secondary cooling apparatus includes a plurality of cooling units equipped with nozzles, each nozzle is provided with delivery orifices from which a refrigerant fluid is delivered, on each occasion according to the punctual cooling needs, toward a metal product.
Apparatus to control and adjust the drawing action in a rolling mill provided with rolling stands through which a product passes. A video monitoring system acquires frames of the product; a processing system that processes the frames and defines a normal rolling range within which the product being rolled must be positioned; identifies the position of the product and its geometric characteristics; and identifies a possible variation of the position of the product being rolled over time based on the analysis of the sequence of frames acquired. An automation system is associated with the rolling mill, configured to receive data relating to the position of the product to determine the continuation of the rolling if the product is correctly positioned in the range, or a variation of the rolling parameters if the position of the product being rolled is able to generate a cobble which is outside of the range.
B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B21B 37/68 - Camber or steering control for strip, sheets or plates, e.g. preventing meandering
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
96.
ELECTRIC ARC FURNACE FOR MELTING METAL MATERIAL AND STEEL PLANT COMPRISING SAID ELECTRIC ARC FURNACE
Electric arc furnace (10) usable for melting a metal charge (M) and comprising a container (11) having at least one perimeter wall (20) in which there are an upper aperture (21), a lateral slagging aperture (22) and a lateral feed aperture (43). A roof (15), able to be opened selectively, can be positioned on the upper aperture (21) of the container (11) and is provided with a central part (30) having one or more through holes (31) into which respective electrodes (32) can be inserted with clearance to melt the metal charge (M).
C21C 5/52 - Manufacture of steel in electric furnaces
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory typeElectric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
Robotized unit (10) for controlling a metal product (P) in motion driven in an automated manner, in accordance with a corresponding computerized method, in order to manipulate or cut a portion of said metal product (P). The present invention also concerns an apparatus (100) and method to produce metal reels (200).
The invention relates to a steel product processing plant, in particular comprising a rolling line (200; 66) and preferably upstream thereof a continuous casting line (4; 6), comprising: at least one steel product direct cooling or cleaning system (202), or another system suitable to spray water on the product being processed; and a system for the separation of mixtures, in particular of a muddy nature, comprising water and scale deriving from said systems, which is provided with at least two pits (F1, F2) for collecting the mixtures, wherein at least a first pit (F1), advantageously provided with a dredging system (270; 46; 70; 170; 370) for continuously removing the scale, is fed by water with coarse scale and at least a second pit (F2) with water with fine scale and wherein said pits each have a maximum overall depth < 10 m, preferably even less.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
100.
METAL STRIP ACCUMULATOR AND STRIP ACCUMULATING METHOD THEREOF
A metal strip accumulator for accumulating strip coming from a production line, said accumulator comprising a plurality of concentric annular structures with respect to a horizontal axis X, for accumulating strip entering said accumulator, a flow diverter for diverting the flow of the strip exiting said accumulator, arranged so as to cross a space delimited by the innermost annular structure of said plurality of concentric annular structures, wherein along the radial direction starting from said axis X one fixed annular structure and one rotating annular structure, adapted to rotate with respect to the axis X, alternate, wherein each rotating annular structure is adapted to rotate, in order to accumulate strip, by an angle less than or equal to 360° in a rotation direction which is opposite to the rotation direction of the rotating annular structure proximal thereto, and wherein each rotating annular structure is adapted to rotate independently of the other rotating annular structures.
