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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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.
CONTINUOUS CASTING PLANT AND CORRESPONDING REGULATION METHOD
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).
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire or material of like small cross-section in a continuous process
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.
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 methods; Sheet 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 devices; Mountings for web rolls or spindles
B41J 15/16 - Means for tensioning or winding the web
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
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.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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.
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
14.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
15.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
16.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire or material of like small cross-section
19.
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 articles; Furnaces 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 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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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
23.
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
24.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
25.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire or material of like small cross-section in a continuous process
26.
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.
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.
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.
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 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 electrically heated heated by hot air or gas
F27D 99/00 - Subject matter not provided for in other groups of this subclass
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.
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.
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
36.
CORRECTION APPARATUS FOR CORRECTING THE PLANARITY OF A METAL STRIP AND RELATED CORRECTION METHOD
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.
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.
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.
B22D 11/124 - Accessories for subsequent treating or working cast stock in situ for cooling
B22D 11/22 - Controlling or regulating processes or operations for cooling cast stock or mould
40.
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
42.
COATING COMPOSITION FOR METALLIC PRODUCTS AND RELATIVE METHOD
A plant to produce metal products, and a corresponding management method, where the plant includes a production line which includes a plurality of operating units, each provided with respective hydraulic circuits, selected from a melting unit, a casting unit, a rolling unit and a cooling treatment apparatus, and a water supply unit having a tank for the water connected to each of the hydraulic circuits and a plurality of water feed devices configured to feed water from the tank to respective hydraulic circuits.
The peeling machine, comprising: a rotating head installed rotating about an axis of rotation and provided with a central cavity in which, during use, there is disposed an elongated product to be worked; the rotating head is provided with a plurality of tools and with at least one adjustment unit configured to move the tools away from or toward the elongated product; a first motor configured to make the rotating head rotate about the axis of rotation; and a transmission unit configured to transmit motion from a second motor to the adjustment unit in order to simultaneously adjust the radial position of the tools; the transmission unit comprises a differential device kinematically connected between the second motor and the adjustment unit so that an adjustment of the position of the tools with respect to the elongated product corresponds to the drive of the second motor.
B23B 5/12 - Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning axles, bars, rods, tubes, rolls, i.e. shaft-turning lathes, roll lathes; Centreless turning for peeling bars or tubes by making use of cutting bits arranged around the workpiece
B23Q 11/10 - Arrangements for cooling or lubricating tools or work
45.
ELECTRIC POWER SUPPLY APPARATUS FOR A HIGH-POWER USER DEVICE
An electric power supply apparatus for a user device, in particular for steel industry applications, that includes means for connection to an electricity grid for supplying a mains voltage and a mains current, and at least one electric line for connecting the electricity grid to the user device, wherein the electric line includes one or more electric apparatuses located between the electricity grid and the user device.
H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
H02M 7/757 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
H01B 12/16 - Superconductive or hyperconductive conductors, cables or transmission lines characterised by cooling
A welding machine, preferably of the flash butt welding type, designed to facilitate maintenance of the clamping means, e.g. clamps, of the two longitudinal metal products to be welded. Advantageously, a first structure, provided with first clamping means, and a second structure, provided with second clamping means, are supported in a first part of the carriage delimited by a first beam and a second beam of the carriage parallel to the feeding direction, while at least one transformer is fixed to the carriage and supported in a second part of the carriage, arranged laterally outside the first part.
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
47.
MELTING METHOD IN AN ELECTRIC ARC FURNACE AND MELTING APPARATUS
Some embodiments described here concern a method for melting metal material in an electric arc furnace, which includes a step of loading solid metal material into the electric furnace, a step of powering the electric furnace and of generating an electric arc between at least one electrode and the metal material, and a step of melting the solid metal material to obtain molten material. Some embodiments described here concern an apparatus for melting metal material including an electric arc furnace and an electric power supply apparatus suitable to power the electric furnace.
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
F27D 11/08 - Heating by electric discharge, e.g. arc discharge
Method for the production of flat metal products, in particular coils of strip, in endless and/or semi-endless mode, in which a metal product is continuously fed to a rolling mill consisting overall of at least 4 stands. The rolling stands are, in sequence, roughing stands, and finishing stands. It is provided to perform a flying gauge change of the metal product exiting from the rolling mill.
B21B 37/20 - Automatic gauge control in tandem mills
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 13/18 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling
B21B 13/22 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting
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
B21B 37/26 - Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
a) to increase turbulence in the tanks and to accelerate pickling, e.g. by adding fresh acid (146) in the first tank. The invention also concerns a related pickling process. The invention optimizes the effect of the acid and reduces the residence time of the strip (109) in the plant.
Converter device configured to convert direct voltage and current into alternating voltage and current to be supplied to a load (L). The converter device comprises a bank (11) of capacitors (12), a plurality of power semiconductors (13), a heat sink (14) and a casing (15).
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
H02M 7/00 - Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
H02M 7/537 - Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
H02M 1/00 - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF - Details of apparatus for conversion
H02M 1/12 - Arrangements for reducing harmonics from ac input or output
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
H05B 7/20 - Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated
51.
Process for detecting water leaks from smelting furnaces in metal or alloy production plants and related plant
The invention concerns a process for detecting water leaks in smelting furnaces (2; 4) or in metal or alloy treatment plants, comprising the following steps: (i) providing at least one smelting furnace (2; 4), or at least one metal or alloy treatment plant provided with a water cooling system (5) and being connected to a process fume exhaust system; (ii) mixing in the cooling water a tracer chemical which is volatile in the event of water leakage together with the exhaust gases and which is suitable to be detected by an analysis system of the exhaust gases; and (iii) detecting said tracer chemical contained in the exhaust gases by said analysis system comprised in said process fume exhaust plant, wherein said tracer chemical is deuterated water. The invention further refers to a Plant for the production of metals or alloys.
G01M 3/20 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
C21B 13/12 - Making spongy iron or liquid steel, by direct processes in electric furnaces
F27D 9/00 - Cooling of furnaces or of charges therein
F27D 21/00 - Arrangement of monitoring devices; Arrangements of safety devices
52.
METHOD AND CORRESPONDING APPARATUS FOR PRODUCING IRON FROM DIRECT REDUCTION OF IRON ORE
A method for producing direct reduced iron is provided. The method includes circulating a first stream of spent reducing gas exiting a reactor in a reducing gas circuit through at least one carbon dioxide removal unit and a reducing gas heater and the reactor. The method also includes mixing the first stream with reducing gas containing heavier hydrocarbons than methane.
A stabilization apparatus for stabilizing a metal strip rising from a molten metal bath along a theoretical feeding plane, comprising
at least one pair of air knives, each being arranged in a mutually specular manner with respect to said plane;
at least one pair of electromagnetic stabilizing devices, each being arranged in a mutually specular manner with respect to said plane;
a pair of first support beams, each supporting a respective air knife;
a pair of second support beams, each supporting a respective electromagnetic stabilizer device;
wherein the pair of second support beams is distinct from the pair of first support beams, and wherein the first support beams are distal from the plane, while the second support beams are proximal to said plane and arranged in an innermost position with respect to the pair of first support beams.
A method for electromagnetic stirring of liquid metal in a continuous charge electric arc furnace, in which there are positioned a first electromagnetic field along a first axis of electromagnetic stirring and a second electromagnetic field along a second axis of electromagnetic stirring.
C21C 5/52 - Manufacture of steel in electric furnaces
B01F 33/451 - Magnetic mixers; Mixers with magnetically driven stirrers wherein the mixture is directly exposed to an electromagnetic field without use of a stirrer, e.g. for material comprising ferromagnetic particles or for molten metal
F27B 3/10 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces - Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces
B01F 101/45 - Mixing in metallurgical processes of ferrous or non-ferrous materials
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
F27D 3/00 - Charging; Discharging; Manipulation of charge
55.
METHOD TO REMOVE COPPER FROM STEEL, AND CORRESPONDING ADDITIVE
Method to remove copper from a bath of molten metal material, by using a reactive additive to remove copper from a bath of molten metal material and applying a depression.
The present invention relates to an elastic junction device for the dynamic connection, in a rolling mill, between the motor side and the head of an adapter or between the adapter and one or more rolling rolls. The junction device comprises a central body which can be connected to an end of said flange so that it can rotate integrally therewith, said device comprising two skids through a connecting pin so that said block rotates integrally with said flange, said skids being mechanically couplable to said adapter to allow the rotation thereof upon the rotation of said flange and vice versa. The junction device comprises at least a first damper element and at least a second damper element housed in the block and which act on opposite parts of the connecting pin so as to absorb the axial tensions which are transmitted along the adapter as a result of the stresses caused by rolling.
F16D 3/50 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
B21B 35/14 - Couplings, driving spindles, or spindle carriers specially adapted for or specially arranged in metal-rolling mills
57.
Method to obtain a continuous casting apparatus and continuous casting apparatus thus obtained
Method to obtain a continuous casting apparatus to cast, through the casting cavity of a crystallizer of a mold, a cast product with a polygonal cross section.
Crystallizer for the continuous high-speed casting of a metal product (P), which has a casting cavity (13) defined by walls (14) connected to each other in correspondence with edges (15) and provided with cooling means (16).
The present invention relates to a device for guiding a movable element, in particular a driving bar of a mandrel or a mandrel, in a rolling mill with mandrel. The device according to the invention comprises a support structure for the advancement of the movable element along an advancement direction. The device comprises a first slide and a second slide which are carried by said support structure and are slidable along a transverse direction which is substantially orthogonal to said advancement direction, in which each slide carries two abutment surfaces for guiding the movable element and in which each slide is movable along said transverse direction between at least a first operating position, upon reaching which said abutment surfaces are susceptible to coming into contact with a movable element of a first predefined diameter, and at least a second operating position, upon reaching which said abutment surfaces are susceptible to coming into contact with a movable element of a second predefined diameter. According to the invention, the device comprises actuating means which move the slides along the transverse direction between the operating positions and lock the slides themselves when one of said operating positions is reached.
B21B 17/04 - Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel in a continuous process
B21B 25/02 - Guides, supports, or abutments for mandrels, e.g. carriages; Adjusting devices for mandrels
60.
Process for cold rolling an aluminum product and related cold rolling plant
A process of cold rolling an aluminum product, e.g. a strip, which crosses at least one rolling stand, wherein a lubricant is applied to the strip close to said at least one rolling stand by means of a plurality of applying means, said lubricant comprising an emulsion of oil and water. A related rolling plant is also described.
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
B21B 1/28 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by cold-rolling
B21B 27/10 - Lubricating, cooling, or heating rolls externally
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
61.
Bending and shifting system for rolling mill stands
The rolling mill stand comprises a bending device and a shifting device for the rolling rolls. The housing supports the upper backing and work rolls, and the lower backing and work roll and comprises the lower bending block, the upper bending block, the chock of the upper work roll, the chock of the lower work roll, the axial shifting device of the upper work roll, the axial shifting device of the lower work roll. The chock of the lower work roll is coupled with the lower bending block to transmit a bending load on the lower work roll. The upper bending block transmits a bending load on the upper work roll by means of the action of actuators. The bending block comprises a slide with a T-section which slides in the guide and a chock of the upper backing roll, whereby the upper bending block, instead of being a single piece, is formed by two different and separate structural components.
A direct reduction system for a direct reduction of iron ore, comprising a reactor having a reduction area and being adapted to be loaded from above with said iron ore; a treatment and feeding line, to process the process gases, thus obtaining a reducing gas mixture, and feed said reducing gas mixture into the reduction area; a line for recovering and treating an exhausted gas exiting the reactor, communicating upstream with the reactor and downstream with said treatment and feeding line; wherein at least one bypass duct is provided, adapted to divert at least one portion of reducing gas mixture from said treatment and feeding line to said recovery and treatment line.
An apparatus for feeding and preheating a metal charge toward a melting furnace of a melting plant, comprising at least one conveyor channel for said metal charge, at least one hood disposed above said conveyor channel and scrap detection means able to identify the profile of the metal charge entering said conveyor channel. The present invention also concerns a plant for melting metal comprising said apparatus, and a method to feed and preheat a metal charge.
at least one plate, made of a material having a third electrical conductivity either greater than or equal to said first electrical conductivity, said at least one plate being inserted in said gap so as to shield said inner surfaces with respect to each other.
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
A vessel for containing direct reduced iron (DRI), such as a reactor for the production of DRI, a bin or a hopper or other container for storing or feeding DRI to melting furnaces or briquetting machines, includes at least an upper zone, defined by a first lateral wall having a substantially cylindrical tubular shape, and a discharge zone, positioned below the upper zone and defined by a second lateral wall having a substantially truncated cone shape converging toward a lower discharge aperture. The second lateral wall has an internal surface at least partly lined by an internal lining.
Apparatus to control continuous casting, including a mold provided with at least one entrance end through which liquid metal is introduced. Furthermore, the apparatus to control continuous casting includes at least one electromagnetic brake associated with the mold, configured to induce in the liquid metal recirculation flows, and a control and command unit connected at least to the electromagnetic brake and configured to manage the functioning thereof.
A melting method including a step of loading solid metal material into an electric furnace, a step of generating an electric arc between at least one electrode and the metal material, a step of perforating the metal material during which the electrode is moved through the metal material, a step of melting the solid metal material in order to obtain a molten material, and a step of refining the molten material by adding reaction compounds. At least one of the steps includes regulating the electric parameters of the electric arc.
H05B 7/144 - Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
68.
Electric power method for an electric furnace and corresponding apparatus
An electric power method for an electric arc furnace includes regulating the electric power frequency of a power voltage and a power current of the electrodes, independently from the mains frequency.
H05B 7/144 - Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
F27B 3/28 - Arrangement of controlling, monitoring, alarm or like devices
Crystallizer for continuous casting comprising a tubular body (11) having at least one wall (12) which defines a through longitudinal casting cavity (13) and a plurality of longitudinal grooves (14) made at least on one part of the wall (12) and open toward the outside thereof. A covering binding (15) is associated to the external surface of the wall (12) to close the longitudinal groves (14) and thus obtain corresponding cooling channels (17) configured to make a cooling liquid flow inside them.
A system for detecting a level of molten steel for an EAF furnace, preferably with three AC electrodes, comprising three electromagnetic coils capable of detecting an electromagnetic field generated by the passage of electric current in a circuit formed between two of said electrodes and the molten metal bath contained in said melting furnace. Preferably, the three coils are arranged on only one side of the outer surface of the furnace only along the arc of circumference of the arc melting furnace facing the two electrodes forming the electromagnetic field and on the side diametrically opposite the third electrode.
F27D 21/00 - Arrangement of monitoring devices; Arrangements of safety devices
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
G01F 23/26 - Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
71.
Continuous casting apparatus and corresponding method
Continuous casting apparatus comprising a plurality of compression units (11), each of which is defined by a lower roll (12) and an upper roll (13) configured to exert a compression action on a cast metal product (P). Each lower roll (12) defines with the respective upper roll (13) a passage gap (14) for the metal product (P). The passage gaps (14) of the compression units (11) are disposed aligned along a casting axis (Z) with an at least partly curved development. A straightening roll (15) is disposed on the extrados side of said casting axis (Z) and between at least two of the lower rolls (12).
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
A soundproof fume discharge conduit adapted to be arranged between a ventilation system and an outlet chimney, the conduit defining a fume path therein, wherein at least one side surface of the conduit is provided with at least two protrusions, each protrusion internally defining a respective step-shaped recess, whereby the path is provided with at least two step-shaped recesses adapted to reflect sound waves propagating along the path, and wherein the step shape of each recess is defined by two first walls, which are incident at a first end thereof, and at least one wall of the two first walls is coated with a first sound absorbing material.
A melting furnace for metallurgical plant comprising a vessel provided with a bottom; a tapping duct passing through the bottom; rotation means to rotate the vessel so that the tapping duct passes from a first reference position to a second position inclined with respect to said first reference position, and vice versa; wherein said tapping duct has a first stretch arranged in the thickness of the bottom and completely passing through the bottom, and a second stretch, adjacent to the first stretch, protruding inside the vessel; wherein there is provided a cover of the second stretch shaped as a tube closed at an upper end thereof and open at a lower end thereof; said tube being coaxial and spaced from said second stretch, and being spaced from a zone of the bottom which includes the first stretch of the tapping duct, whereby the cover, in cooperation with the second stretch of the tapping duct, acts as a tapping hood.
A delivery device for delivering stock material into a blast furnace includes a transition channel for the stock material, a chute for delivering the stock material, a first annular body, coaxial to and outside the transition channel, adapted to rotate about a first axis, and a second annular body, coaxial to and outside the first annular body, adapted to translate along the first axis with respect to said first annular body and/or to rotate about the first axis together with said first annular body. When the second body translates along the first axis, at least one fixed rack rotates at least one toothed wheel and a respective shaft about a second axis transversal to the first axis, thus causing a change in the inclination of the chute with respect to the first axis.
Method for the continuous casting of a product (P), chosen from billets or blooms, along a curved casting line (18), the method providing to cast a liquid metal (M) in a crystallizer (11) having a tubular cavity (12) with an octagonal cross section.
A method and apparatus for producing direct reduced iron using a pre-treated make-up gas as a reducing agent in a direct reduced iron reactor are provided. The method involves pre-treating a stream of make-up gas containing heavy hydrocarbons by subjecting the stream to low temperature adiabatic reforming at a temperature between 300° C. and 600° C., prior to using the stream of make-up gas as a reducing agent for producing direct reduced iron. The method also involves adjusting the humidity content of the stream of make-up gas after the low temperature adiabatic reforming by bypassing the stream to selectively split it into a first part of the stream of make-up gas and a second part of the stream of make-up gas, subjecting the first part to water separation, and then mixing the first part with the second part to obtain a reducing stream to be sent to direct reduced iron production.
1; wherein the first cutting device is arranged at a first distance from the crystallizer expressed in meters, along the processing line, calculated according to a specific mathematical relation.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B22D 11/16 - Controlling or regulating processes or operations
B22D 11/126 - Accessories for subsequent treating or working cast stock in situ for cutting
78.
Container, device and method for storing or processing particulate materials to minimize or eliminate vibrations such as quaking or shaking
A container with lower vibrations, such as quaking and shaking as well as noise effects, known also as hooting, honking or howling, and an effective and cost-competitive method and device to decrease such phenomena during the discharge of granular material particles from silos, hoppers, bins, reactors and in general containers for storing or processing such granular material particles. The container includes at least one baffle that is attached to the container wall, in the lower portion or at the bottom of the tapered discharge part of said container, protruding towards the central axis of its tapered discharge part. The baffle forms a stagnant zone in the bed of the granular material particles in contact with the container wall whereby the particles in that zone flow under the friction against other particles instead of the friction between the particles and the wall.
A stretching machine for extruded profiles comprises a stretching head capable of translating along a predetermined direction (X) on a basement and actuation means for translationally actuating the stretching head with respect to the basement. The actuation means comprise a mechanical drive comprising at least one motor element, which is integral with one of said stretching head and said basement, and at least one driven element, operatively connected to the at least one motor element and integral with the other of said stretching head and said basement, and an electric motor operatively connected to the motor element of the mechanical drive.
B21D 3/12 - Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by stretching with or without twisting
A heating device and/or method to heat a slab, and in particular its edges, by electromagnetic induction, including an electric coil and a magnetic concentrator associated with the electric coil.
A system of pullers, in particular for extruding metals, the system comprising at least a first puller and a second puller, each equipped with gripping means adapted to engage and grip an end portion of a profile, in particular of an extruded profile exiting from an extrusion press, the system comprising a first guide and a second guide, where the at least two, first and second, pullers can be translated along the first and second guides, where the first guide is dedicated to the translation of both the at least two, first and second, pullers in a single first translation direction, and where the second guide is dedicated to the translation of both the at least two, first and second, pullers in a second translation direction opposite to the first translation direction.
The invention relates to an apparatus (10) for the thermal treatment of metallic products, which comprises (a) a support and transport plane (24); (b) at least one collector module (12) comprising at least one collector (14, 16), the collector (14) being provided with a perforated plate (22) facing the support and transport plane (24); (b-2) a conduit (20) connected to said at least one collector (14), and (b-3) integrated in said conduit (20), at least one stop valve (18). The stop valve (18) is situated at a distance from the collector (14) which does not exceed 60 cm. The perforated plate (22) is provided with holes which are arranged in rows parallel to each other but not in parallel rows with respect to the sides of said perforated plate. The rows are inclined with respect to two opposite sides of the plate (22) of an acute angle.
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
B05B 1/14 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with strainers in or outside the outlet opening
B05B 1/30 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
C21D 1/667 - Quenching devices for spray quenching
A slag door for a melting furnace for the production of steel is suitable to be associated with an aperture provided in a lateral wall of the melting furnace and to cooperate with a slag channel provided inside the melting furnace itself.
A method to adjust the drawing action on a bar in a rolling and/or finishing train is provided, as well as an adjustment device associated with the train to implement the method. A metal product is made using the method.
B21B 1/18 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire or material of like small cross-section in a continuous process
B21B 37/52 - Tension control; Compression control by drive motor control
Apparatus for melting metal material comprising a container for metal material, by way of example, but not limited to, metal scrap, DRI, cast iron, supplied in an electric arc-type melting furnace, and a plurality of electrodes to melt the metal material, which can be inserted in said container.
H05B 7/10 - Mountings, supports, terminals, or arrangements for feeding or guiding electrodes
F27B 3/08 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces heated electrically, e.g. electric arc furnaces, with or without any other source of heat
The invention relates to a press for extruding metal material. The press comprises a hydraulic oil circuit for controlling one or more extrusion pistons movable within corresponding cylinders. Such a circuit comprises a fixed displacement, circulation pump operated by an electric motor with variable rotation speed. The hydraulic circuit comprises a main line and a branch line, along which a shutoff element is arranged. The hydraulic circuit comprises a hydraulic control unit comprising a pilot valve arranged along a pilot line provided with a first segment communicating with the main line and a second discharging segment. Said hydraulic unit is provided to move the shutoff element between an opening position and a closing position of the branch line according to the difference between the oil pressure upstream of the shutoff element and that in the first segment of said pilot line. The hydraulic circuit further comprises a control element which, in an activation condition, and as a result of the activation of said pilot valve, determines a gradual increase of the pressure in the first segment of said pilot line and a corresponding gradual closing movement of said shutoff element causing a consequent gradual increase of the thrust on the piston until the reference speed is reached.
The present invention relates to a press for the direct extrusion of metallic material, wherein the press comprises a supporting structure which defines an extrusion axis and a transverse direction orthogonal to said extrusion axis. The press further comprises an extrusion die and a die-holder drawer, in which said die is placed. Moving means are provided for moving said drawer along a transverse direction between a first position (P1), in which said die is aligned with said extrusion axis, and a second position in which, when reached, said die can be replaced. The press according to the invention further comprises a fixed supporting element which supports the drawer at least when it occupies the first position. The press further comprises at least a movable supporting element for supporting said drawer during the movement along said transverse direction; lifting means are provided for vertically lifting the movable supporting element between a first vertical position, in which the drawer is supported by the fixed supporting element, and a second vertical position, in which the drawer is lifted with respect to the fixed supporting element and supported by said at least one movable supporting element.
The present invent on relates to a press for the direct extrusion of metallic material. The press comprises a supporting structure, a container receiving the metallic material to be extruded, a container holder element and a plurality of adjustment devices to adjust the position of the container holder with respect to the supporting structure. The container holder element is movable along an extrusion direction by means of a plurality of pads slidable along corresponding guides integral with the supporting structure. The press comprises at least one motorized member operationally connected to at least one of the adjustment devices to determine a variation of the position of the container holder with respect to the supporting structure.
A melting apparatus for steel production includes a support structure to support a shell for the production and tapping of steel, and a source or zone for the emission of fumes resulting from the tapping of the steel from the shell. The melting apparatus also includes a tapping hood integrated into the support structure and provided with a suction mouth positioned directly above the zone for the emission of fumes, the shell is provided with a bottom wall in which an E.B.T. is provided for tapping the steel.
B22D 45/00 - Equipment for casting, not otherwise provided for
B08B 15/04 - Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
F27D 17/00 - Arrangement for using waste heat; Arrangement for using, or disposing of, waste gases
F27B 3/19 - Arrangement of devices for discharging
F27B 3/12 - Working chambers or casings; Supports therefor
B08B 15/02 - Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
C21C 5/40 - Offtakes or separating apparatus for converter waste gases or dust
A plant for cleaning rolled metal strips provided with a superficial layer of oxide, 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 superficial layer of oxide, arranged between said unwinding means and said pickling means. A relating cleaning method is also claimed.
B21B 45/06 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling of strip material
C23G 3/02 - Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
91.
Apparatus to replace a guide unit in a continuous casting machine
Apparatus to replace a guide unit in a continuous casting machine. A platform is positioned, during use, at the side of a casting line, and is provided with at least a first positioning zone of at least a first guide unit and at least a second positioning zone of at least a second guide unit. The platform is associated with a rotation device to take, on each occasion, the first positioning zone or the second positioning zone facing the side of the casting line. A movement device moves the second guide unit from a positioning zone outside the platform and, during use, in line with the casting line, to the second positioning zone of the platform and to move the first guide unit from the first positioning zone of the platform to the positioning zone outside the platform and, during use, in line with the casting line.
A shear for cutting and simultaneously conveying one or more pairs of rolling wires or bars includes a mobile diverter with at least two channels in each of which a wire or bar slides and at least two pairs of counter-rotating knives, each pair of which acts upon the wire or bar to produce cut segments of wires or bars. The cut segments of wires or bars are then conveyed by a conveying device including at least one pair of mobile elements that may be configured to move independent of each other and to be synchronized with each other and with the mobile diverter for facilitating insertion of each of the cut sections of wires or bars into an output channel of at least two pairs of output channels, each pair of output channels corresponding to one of the mobile diverters.
B23D 33/02 - Arrangements for holding, guiding, or feeding work during the operation
B23D 25/12 - Shearing machines with blades on coacting rotating drums
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
B21B 39/18 - Switches for directing work in metal-rolling mills or trains
93.
Continuous casting method and corresponding apparatus
Method for the continuous casting of a product (P) along a curved casting line (18), provided with a crystallizer (11) having a tubular cavity (12) with a polygonal cross section defined by a determinate number of sides (n). The product (P) exiting from the crystallizer (11) is curved along the casting line (18) by support and curving rollers (19) and without the aid of lateral containing sectors of the cross section of the product (P).
A combined continuous casting and endless rolling plant for a metal strip, comprising—a continuous casting line (1) for casting a slab; —a first rolling mill (6) for roughing the slab and for obtaining a transfer bar; —a second rolling mill (11) for finishing the transfer bar and for obtaining a strip; —a third rolling mill (18), comprising at least two rolling stands (17), for further reducing the N thickness of the strip; —accumulation means (20) of the strip comprising at least one first reel (37, 37′) dimensioned to wind and unwind a coil weighing from 80 to 250 metric tons and/or up to 6 meters in diameter, named mega coil; —first cutting means (13), arranged between said third rolling mill (18) and said accumulation means (20), configured to cut the strip after the mega coil has been wound on the at least one first reel (37, 37′); —at least one second reel (48) for winding portions of strip, unwound from said accumulation means (20), up to a predetermined weight limit or coil diameter limit; —second cutting means (47), arranged between said accumulation means (20) and said at least one second reel (48), adapted to cut the strip whenever a portion of strip wound on the at least one second reel (48) reaches said predetermined weight limit or coil diameter limit.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
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 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
95.
Combined continuous casting and metal strip hot-rolling plant
A combined continuous casting and endless rolling plant for a metal strip, comprising—a continuous casting line (1) for casting a slab;—a first rolling mill (6) for roughing the slab and for obtaining a transfer bar;—a second rolling mill (11) for finishing the transfer bar and for obtaining a strip;—a third rolling mill (18), comprising at least two first rolling stands (17), for further reducing the thickness of the strip;—accumulation means (20) of the strip, downstream of said third rolling mill (18), comprising at least one first high-capacity reel (37, 37′) dimensioned to wind and unwind a coil weighing from 80 to 250 tons and/or up to 6 meters in diameter, named mega coil;—flying cutting means (13), arranged between said third rolling mill (18) and said accumulation means (20), configured to cut the strip after the mega roll has been wound on the at least one first reel (37, 37′);—a cutting and winding line (22), downstream of said accumulation means (20), for cutting the strip of the mega coil and winding portions of said strip of the mega coil to a predetermined weight limit or coil diameter limit, producing a plurality of coils; wherein said cutting and winding line (22) is provided with a reversible rolling mill for performing at least one rolling of the strip before producing said plurality of coils.
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
An apparatus for the hot production of strip (N) including a casting machine (11) configured to cast a thin slab (TS), a heating device (16) configured to maintain the temperature of and/or heat said thin slab (TS), at least one roughing unit (19) and a finishing unit (20) configured to obtain a strip (N), and wherein said casting machine (11), the heating device (16), the roughing unit (19), and the finishing unit (20) are disposed aligned along a common working axis (Z).
B21B 13/22 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 39/00 - Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 1/32 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession 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
Apparatus to guide a metal product, the apparatus includes a support body (11). A plurality of support arms (12) are associated with the support body (11). A plurality of guide rolls (13) are installed rotating in an idle manner on the support arms (12) and define between them a roller guide gap (14) for the metal product. Adjustment devices (24) associated with the support arms (12) and adjust, independently from each other, the position of each of the guide rolls (13. Detection devices (19) detect the stresses induced by the metal product on the guide rolls (13).
A soft reduction device (1) of a round-section metal product, having liquid or partially liquid core, for reducing the thickness of said metal product coming from a continuous casting machine, the device comprising at least two soft reduction units (2, 3); in which said at least two soft reduction units (2, 3) are arranged in series; in which each soft reduction unit (2, 3) is provided with a group of only three rolls arranged at 120° from one another; and wherein the group of three rolls (7, 8, 9) of one soft reduction unit is offset by a predetermined angle with respect to the group of three rolls (10, 11, 12) of an adjacent soft reduction unit.
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-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B22D 11/041 - Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
99.
Rolling mill for rolling concave, rod-shaped bodies
A rolling mill for rolling hollow or, in all cases, concave rod-shaped bodies, in particular tubes, in particular seamless tubes, said rolling mill comprising a rolling section (10) with a plurality of mill stands and/or rolling dies (11) arranged in succession to define a rolling axis Y, said rolling mill further comprising moving means for moving a mandrel (20) and a tubular blank (21) fitted onto an end portion (22) of said mandrel (20) along said rolling axis and through said mill stands or rolling dies (11) in succession; wherein said moving means are structured so as to move said mandrel (20) and said blank (21) along said rolling axis Y and through said mill stands or rolling dies (11) in succession by applying a traction on said mandrel.
B21B 17/04 - Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel in a continuous process
A rolling mill stand for rolling rod-shaped bodies, in particular tubular bodies, said stand comprising at least three rolls (10) mutually arranged to define a rolling pass line for said rod-shaped and/or tubular bodies, wherein at least one of said three rolls (10) is rigidly mounted on a roll holder shaft (20), freely fixed in turn in a rotational manner to said stand by means of a first hollow support (40) and a second hollow support (30) arranged on opposite sides of said at least one roll (10), respectively, wherein a first portion (21) and a second portion (22) of said roll holder shaft (20) are housed in said first hollow support (40) and in said second hollow support (30), respectively, where the constraint between at least said first hollow support and said first portion (21) of the roll holder shaft is of elastic type.
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 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
patents
