WO2023011790A1 - Procédé de production d'une bande d'aluminium et système de coulée-laminage pour la production d'une bande d'aluminium - Google Patents

Procédé de production d'une bande d'aluminium et système de coulée-laminage pour la production d'une bande d'aluminium Download PDF

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Publication number
WO2023011790A1
WO2023011790A1 PCT/EP2022/066325 EP2022066325W WO2023011790A1 WO 2023011790 A1 WO2023011790 A1 WO 2023011790A1 EP 2022066325 W EP2022066325 W EP 2022066325W WO 2023011790 A1 WO2023011790 A1 WO 2023011790A1
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WO
WIPO (PCT)
Prior art keywords
casting
rolling
strip
aluminum
melt
Prior art date
Application number
PCT/EP2022/066325
Other languages
German (de)
English (en)
Inventor
Markus Fischer
Guido Fick
Michael Schäfer
Michael Breuer
Original Assignee
Sms Group Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sms Group Gmbh filed Critical Sms Group Gmbh
Priority to EP22735373.7A priority Critical patent/EP4380736A1/fr
Priority to CN202280062236.0A priority patent/CN117980083A/zh
Publication of WO2023011790A1 publication Critical patent/WO2023011790A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—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
    • B21B1/46—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
    • B21B1/463—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 in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B22D11/003—Aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/14—Reduction rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Definitions

  • the invention relates to a method for producing aluminum strip in a coupled casting and rolling process.
  • WO 2019/01 02841 discloses a method for producing an aluminum product from a cast aluminum strip, in which a hot strip is first produced by means of at least one strip casting machine and is then hot-rolled.
  • DE 69319217 T2 discloses a process for the production of can body sheet metal, which involves the continuous hot rolling of a feedstock consisting of hot aluminum in order to reduce its thickness and the winding of the hot-rolled, still hot feedstock and holding the feed strip, which is reduced in thickness in the hot state at or near the initial temperature of hot rolling, thereafter uncoiling the hot coiled feedstock and immediately thereafter rapidly quenching the tempered feedstock to a temperature suitable for cold rolling.
  • the process is carried out as a continuous "in-line" process.
  • the object of the invention is to provide a method of the type mentioned at the beginning, with which a high proportion of aluminum scrap can be processed as aluminum raw material or starting material for the production of aluminum strip in an industrially usable quality.
  • the invention is also based on the object of providing an aluminum material that was obtained using a high proportion of aluminum scrap.
  • the invention is based on the object of providing a casting and rolling installation which is particularly suitable for the method according to the invention.
  • a method for producing aluminum strip in a coupled casting-rolling process is provided, which is preferably operated as a continuous casting-rolling process, which comprises the following method steps: a) melting an aluminum raw material comprising at least one aluminum alloy in at least one melting unit, b) determining the alloy composition of the melt c) casting the melt to form a cast strip using at least one strip casting machine, d) rolling the hot strip in a rolling mill comprising at least one rolling device for forming the hot strip for the purpose of reducing the thickness and/or width, and e) regulating and/or controlling at least one forming parameter of the rolling mill depending on the alloy composition of the melt.
  • Coupled within the meaning of the present invention means that the casting process and the rolling process are connected to one another in terms of process technology and with regard to the material flow.
  • the melting of the aluminum raw material, casting and rolling can also take place continuously, with the throughput speed of the material always being determined by the belt speed during casting.
  • the alloy composition of the melt can be determined continuously or in batches.
  • the results of the analysis of the alloy composition can be fed online, preferably in real time, to a regulating and/or control device of a casting and rolling plant.
  • a suitable method for analyzing the alloy composition of the melt is, for example, a spectral analysis, an X-ray measurement or a similar known measuring method.
  • a mixture of electrolytically produced pure aluminum or primary aluminum and aluminum scrap is preferably used as the aluminum raw material.
  • the aluminum raw material can contain impurities in the form of, for example, iron, copper, silicon, chromium, magnesium, manganese, nickel, zinc and tin.
  • the melt is preferably fed continuously to the at least one strip casting machine via a runner, it being possible for the melt to be filtered in order to withstand any contamination.
  • the continuous feeding of the melt into the strip casting machine has the advantage that the level of the melt in front of the pouring nozzle is largely constant and relatively constant pouring conditions can thus be set. As a result, the melting process can be coupled directly with the casting and rolling process.
  • At least one forming parameter is preferably selected from a group of parameters comprising a reduction in thickness of the hot strip, a reduction in width of the hot strip, the strip temperature of the hot strip, the rolling speed, the strip tension of the hot strip, the rolling force, the roll deflection, an axial adjustment of at least one roll, the roll gap geometry , the rolling torque, the cooling of the rolls and the lubrication of the rolls.
  • the power and work requirements and other forming parameters are adjusted accordingly during rolling. These adjustments can also affect the strip geometry and the rheological roll gap conditions and the influencing the material properties of the aluminum strip or the hot strip, for example by cooling and lubricating devices.
  • the regulation includes a pre-control of the rolling mill for a given and/or selected strip length section of the hot strip as a function of the alloy composition determined according to method step b).
  • the pre-control particularly preferably includes the specification of at least one setpoint for a thickness and/or profile control of at least one rolling device.
  • casting parameters such as the casting thickness, the casting speed and the casting belt temperature can be adjusted in terms of control technology.
  • the material hardness H and, similarly, the deformation resistance as a function of the alloy composition can be represented with an exponent to a constant as the basic factor of the material hardness.
  • the constant is the basic factor within the alloy group.
  • the exponents serve as an exponent of the content in the alloy of the respective element.
  • the material hardness H due to the alloy change can be calculated by inserting the contents. This makes it possible to predict the change in the rolling force and thus to precontrol, for example, the contact position of the work rolls of a rolling device in order to produce the (originally) intended rolled product.
  • the same algorithm can be used to pre-control the roll gap profile.
  • the change in the roll gap profile is carried out on the basis of the expected change in the rolling force by means of a pre-control of the work roll bending device or roll displacement.
  • the forming resistance of the hot strip changes as a result of alloy fluctuations.
  • the rolling force changes and with it the reduction in thickness of the hot strip.
  • a thickness error can be calculated by measuring the rolling force and knowing the reaction forces or rigidity of the rolling device. This thickness error is traced back to an adjustment position of the work rolls with an adjusted reinforcement, with which the target thickness of the hot strip is set. Based on experimental investigations with comparative analysis, relationships between changing circumferential resistances due to analysis fluctuations can be shown using approximate calculations.
  • the thickness control can be corrected by means of a pre-control as soon as hot strip with a changed alloy composition enters the rolling device. In this way, a pilot control can specify an additional setpoint value for adjusting at least one rolling device, so that thickness control is possible in this respect is no longer required or only to a small extent.
  • the melt has a recycled content, preferably in the form of aluminum scrap, of at least 60 percent by weight, preferably at least 70 percent by weight, more preferably at least 85 percent by weight and particularly preferably at least 95 weight percent.
  • the aluminum alloy can be selected from a group comprising the aluminum alloys AA2 XXX, AA5XXX, AA6 XXX and AA7 XXX. These alloy groups have multiple alloy components and are used, among other things, for applications in the electrical and automotive industries.
  • the melt is cast into a cast strip with a thickness of 10 mm to a thickness of 30 mm.
  • the casting can be carried out, for example, at a casting speed of 4 m/min to 16 m/min.
  • Rolling is preferably carried out at a temperature of 150° C. to 600° C., preferably from 300° to 500° C., with a reduction in thickness of 20 to 75 percent per roll stand, based on the initial thickness of the hot strip
  • the traveling mold of the strip casting machine can be used as a circulating strip (so-called belt caster) or as a be executed around running blocks (so-called block casters).
  • a strip casting machine is understood to mean a casting machine that produces strip-shaped casting material. It is advantageous that the casting takes place at an increased cooling rate and thus at an increased solidification rate compared to the usual slab casting machines, as a result of which impurities are partially kept in solution during casting. Due to the fact that the melt solidifies without moving relative to the mold, there is a very intensive heat transfer and the melt can solidify relatively quickly, which is particularly advantageous because it partially keeps impurities in the melt in solution.
  • one or more multi-chamber melting furnaces can be provided as melting aggregates.
  • the smelting aggregates can be charged from a corresponding stock of different aluminum scraps with different compositions
  • the temperature of the cast strip is adjusted prior to rolling.
  • a device for influencing the temperature in the form of a temperature increase or cooling of the cast strip before rolling can be provided.
  • the hot strip can be quenched downstream of the at least one rolling device or downstream of at least one rolling device, for example to a temperature of 150° C. to 250° C. Such a quench is particularly advantageous in order to avoid the formation of coarse grains in the structure.
  • an abrasive surface conditioning is provided for the upper side and/or the underside of the cast hot strip in order to be able to free the strip surface from contamination on each side.
  • the invention further relates to an aluminum product preferably obtained by the method of the type described above.
  • the aluminum product is characterized by a high recyclate content of at least 70 percent by weight, preferably at least 85 percent by weight and particularly preferably at least 95 percent by weight.
  • a further aspect of the invention relates to a casting and rolling plant for the production of aluminum strip, in particular for carrying out the method described above, comprising at least one melting unit, at least one strip casting machine and at least one rolling device, means for determining the alloy composition of an aluminum melt and at least one control and/or or control device for regulating and/or controlling at least one forming parameter of the at least one rolling device as a function of the alloy composition of the melt.
  • the strip casting machine can be designed as a casting machine with an accompanying mold.
  • At least one multi-chamber melting furnace can be provided as the melting unit.
  • the casting and rolling plant according to the invention expediently comprises a large number of roll stands, which preferably each have at least two work rolls and two back-up rolls and at least two hydraulic adjustment cylinders for setting a roll gap.
  • the work rolls can be designed as so-called CVC (Continuous Variable Crown) rolls with a crowned contour.
  • CVC Continuous Variable Crown
  • the casting-rolling plant according to the invention expediently comprises at least one trimming shear which is arranged behind a rolling device and in front of a coiler. This is used to set the width of the finished rolled strip in a defined manner and to remove tight strip edges or edge cracks
  • the casting-rolling device preferably comprises means for surface conditioning of the cast hot strip, for example in the form of brush devices, means for subjecting the hot strip to high pressure with liquid media or the like. These means are preferably arranged in front of the rolling devices in the transport direction of the hot strip.
  • the casting and rolling installation can also include means for cooling the rolled strip downstream of the rolling mill or downstream of a last rolling device.
  • the casting-rolling plant according to the invention preferably comprises at least two rolling devices or roll stands arranged directly one behind the other.
  • the distance between the rolling devices and the at least one strip casting machine can be between 5 m and 20 m.
  • the compact arrangement prevents precipitation processes in the rolling stock.
  • the casting and rolling plant according to the invention preferably comprises a scrap recycling system for process scrap into a storage level of the melting units
  • Figure 1 is a schematic representation of the casting-rolling process according to the invention.
  • Figure 2 is a schematic representation of a control scheme of the
  • FIG. 1 shows a casting and rolling plant 1 for the production of aluminum strip 2 according to the method according to the invention.
  • the casting and rolling plant 1 comprises a plurality of melting units 4 for producing a melt 3 from aluminium.
  • the melting aggregates 4 shown only schematically can be designed, for example, as multi-chamber melting furnaces.
  • the smelting units 4 are charged with an aluminum raw material from a storage level 5 on which aluminum scrap, among other things, is stored in various scrap stores A, B, C, D.
  • the aluminum scrap consists, for example, of can scrap obtained from a waste management company and partly of process scrap that is obtained in the method described below.
  • the casting and rolling plant 1 also comprises a strip casting machine 6, which is designed, for example, as a so-called belt caster or block caster for the production of cast strip 7, and two roll stands 15 downstream in the transport direction, with which the aluminum strip 2 is reduced in thickness.
  • the roll stands 15 are in one arranged a short distance of between 5 m and 20 m behind the strip casting machine 6 in the transport direction.
  • the strip casting machine 6 is immediately downstream of a device for cleaning the surface 11 of the cast aluminum strip 2 and cropping shears 12 for separating the casting strip head and/or casting strip foot that occurs when the aluminum strip 2 is cast on and cannot be processed further.
  • a device for influencing the temperature 16 can be provided in front of the roll stands 15, which device is designed as a heating and/or cooling device.
  • the roll stands 15 each comprise two driven work rolls and two back-up rolls and a hydraulic adjustment system for the work rolls, via which the roll gap can be adjusted.
  • the roll stands 15 also each comprise a work roll bending system and means for axial adjustment of the work rolls.
  • the aluminum melt 3 produced with the melting units 4 is fed to the belt casting machine 6 via a casting channel 8 with a regulated mass flow.
  • a flow controller 9 is provided in the casting channel 8 , which is followed by a filter 10 for filtering impurities in the melt 3 .
  • the melt can thus be fed to the casting machine continuously, so that a quasi-continuous casting-melting-rolling process is possible.
  • Behind the two roll stands 15 forming the rolling mill 14 is a strip cooling device 18 which is followed by trimming shears 19 . This is followed by flying shears 21 .
  • two reels 23 are provided for winding up the rolled aluminum strip.
  • Scrap bunkers 13B and 13C Behind the trimming shears 19 and behind the flying shears 21 are each more Scrap bunkers 13B and 13C arranged, from which the process scrap can be supplied via the system for Listechrott25.
  • the material sections collected in the scrap bunkers 13A, 13B and 13C can be supplied to the respective scrap stores A, B, C, D of the storage level 5 as sorted scrap.
  • Scrap logistics can be provided for the system for process scrap 25, which can be operated in an automated, partially automated or manual manner.
  • the aluminum scrap pre-sorted in the scrap stores A, B, C, D are first subjected to a two-stage melting process in the melting units 4 .
  • the scrap is first heated until any paint and other organic compounds that may be present evaporate.
  • the steam can, for example, be further used as an energy carrier.
  • the aluminum is then melted down.
  • the chemical composition of the melt is analyzed with the aid of an analysis device 40, for example the proportion of metal impurities in the form of iron, copper, silicon, chromium, magnesium, manganese, nickel, zinc and tin is determined.
  • the alloy composition is recharged to specific desired properties.
  • proportions of process scrap and/or pure aluminum are supplied from the storage level 5 or from the scrap stores A, B, C, D.
  • the temperature of the melt is adjusted, among other things, via the proportion of scrap added.
  • the adjusted melt is fed to the strip casting machine 6 via the casting channel 8 with a controlled mass flow.
  • the melt passes through the filter 10, which filters out any impurities in the melt.
  • An unspecified casting nozzle guides the melt into the solidification area.
  • the mold of the strip casting machine 6 is designed as a moving mold.
  • the melt solidifies without moving relative to the mold. This results in a very intensive heat transfer and the melt can solidify relatively quickly.
  • the melt is cast with a thickness of 10 mm to 30 mm, particularly preferably with a thickness of 15 to 25 mm as a casting strip 7, wherein the casting speed is 4 m/min to 16 m/min.
  • the rapid solidification of the melt prevents segregation and suppresses the precipitation of impurities in the form of iron, copper, silicon, chromium, nickel, zinc and tin, for example.
  • the alloy components remain largely in solution. This makes the casting process more tolerant of contamination. Due to the rigid, accompanying mold of the strip casting machine 6, the solidifying strand does not detach. The heat transfer remains consistently high.
  • the solidified cast strip 7 is fed directly to the rolling plant 14 and reduced in thickness to aluminum strip 2 . Due to the fact that there is only a relatively small distance between the rolling installation 14 and the strip casting machine 6, as already explained above, precipitation processes in the rolling stock are prevented.
  • the pass reduction per roll stand 15 is preferably between 25% and 70% per roll stand.
  • the cast structure of the cast strip 7 is converted into a rolled structure of the aluminum strip 2 and a rolled texture is produced in the material.
  • hydraulically acting actuators are arranged on each roll stand 15, with which the roll rise and/or a roll bending system and/or an axial adjustment of the work rolls can be effected.
  • the rolling mill is regulated as a function of the alloy composition of the melt 3 , which is determined via the analysis device 40 and is fed to a regulating and/or control device denoted by 50 .
  • This controls the actuators of the roll stands 15 accordingly, with a pilot control of the rolling installation 14 being expediently provided for a given or selected strip length section of the casting strip 7 .
  • the pilot control includes the specification of at least one setpoint for a thickness and / or profile control at least one of Rolling stands 15.
  • the at least one thickness and/or profile control is corrected by means of the pre-control as soon as the cast strip 7 with a certain known alloy composition enters the rolling plant 14.
  • the setting of the thickness, reduction in thickness and width of the aluminum strip 2 result from various parameters that define the forming resistance. These parameters include alloy composition, strip temperature, strip tension, roll lubrication, strip lubrication, roll diameter, roll geometry (bending, crowning, crown), rolling force and rolling torque.
  • the results of the analysis device 40 for regulating and/or controlling act at least on the rolling mill 14, preferably independently of the casting process and the strip casting machine 6.
  • Process step a) denotes the melting of the aluminum raw material
  • process step b) the analysis of the alloy composition of the melt
  • process step c) the casting of the melt using the strip casting machine 6
  • process step d) the rolling of the hot strip.
  • the same parts of the casting/rolling installation 1 are provided with the same reference symbols in FIG.
  • Reference number 60 designates a production planning and control module which is connected to process model 55 in order to Production specifications, such as bandwidths, target thicknesses, target structure, etc., should be included in the calculation.
  • the production planning and control module 60 has an effect on the composition of the melt 3, for example via the target X, for example by appropriately supplying aluminum scrap from the various scrap stores A, B, C, D.
  • the subsequent analysis device 40 determines the proportion of impurities of the melt 3, which is fed to the control device 50 as an input variable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé de production d'une bande d'aluminium (2) dans un processus de coulée-laminage couplés, comprenant les étapes de procédé suivantes : a) la fusion d'une matière première d'aluminium comprenant au moins un alliage d'aluminium dans au moins un ensemble de fusion (4), b) la détermination de la composition d'alliage de la masse fondue (3), c) la coulée de la matière en fusion (3) pour former une bande laminée à chaud au moyen d'au moins une machine de coulée en bande (6), d) le laminage de la bande laminée à chaud dans un système de laminage (14) comprenant au moins un dispositif de laminage pour la mise en forme de la bande laminée à chaud pour une réduction de l'épaisseur et/ou de la largeur, et e) la régulation et/ou la commande d'au moins un paramètre de mise en forme du système de laminage (14) en fonction de la composition d'alliage de la matière fondue (3). L'invention concerne également un système de coulée-laminage (1) pour la mise en œuvre du procédé.
PCT/EP2022/066325 2021-08-04 2022-06-15 Procédé de production d'une bande d'aluminium et système de coulée-laminage pour la production d'une bande d'aluminium WO2023011790A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22735373.7A EP4380736A1 (fr) 2021-08-04 2022-06-15 Procédé de production d'une bande d'aluminium et système de coulée-laminage pour la production d'une bande d'aluminium
CN202280062236.0A CN117980083A (zh) 2021-08-04 2022-06-15 制造铝带材的方法和制造铝带材的铸轧设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021208437.0A DE102021208437A1 (de) 2021-08-04 2021-08-04 Verfahren zur Herstellung von Aluminiumband und Gieß-Walzanlage zur Herstellung von Aluminiumband
DE102021208437.0 2021-08-04

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WO2023011790A1 true WO2023011790A1 (fr) 2023-02-09

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PCT/EP2022/066325 WO2023011790A1 (fr) 2021-08-04 2022-06-15 Procédé de production d'une bande d'aluminium et système de coulée-laminage pour la production d'une bande d'aluminium

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EP (1) EP4380736A1 (fr)
CN (1) CN117980083A (fr)
DE (1) DE102021208437A1 (fr)
WO (1) WO2023011790A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69319217T2 (de) 1992-12-28 1999-01-21 Kaiser Aluminium Chem Corp Herstellungsverfahren für Büchsenkörperblech mittels kontinuierlicher In-line-Arbeitsgänge in zwei Folgen
US20030150587A1 (en) * 2002-02-11 2003-08-14 Zhong Li Process for producing aluminum sheet product having controlled recrystallization
EP3234208A1 (fr) * 2014-12-19 2017-10-25 Novelis Inc. Alliage d'aluminium approprié pour la production à grande vitesse d'une bouteille en aluminium et procédé de fabrication associé
EP3434383A1 (fr) * 2017-07-24 2019-01-30 Primetals Technologies Austria GmbH Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir
WO2019102841A1 (fr) 2017-11-21 2019-05-31 株式会社オートネットワーク技術研究所 Réacteur
DE102019105598A1 (de) * 2019-03-06 2020-09-10 Hydro Aluminium Rolled Products Gmbh Verfahren zur Herstellung eines Aluminiumbands mit hoher Festigkeit und hoher elektrischer Leitfähigkeit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69319217T2 (de) 1992-12-28 1999-01-21 Kaiser Aluminium Chem Corp Herstellungsverfahren für Büchsenkörperblech mittels kontinuierlicher In-line-Arbeitsgänge in zwei Folgen
US20030150587A1 (en) * 2002-02-11 2003-08-14 Zhong Li Process for producing aluminum sheet product having controlled recrystallization
EP3234208A1 (fr) * 2014-12-19 2017-10-25 Novelis Inc. Alliage d'aluminium approprié pour la production à grande vitesse d'une bouteille en aluminium et procédé de fabrication associé
EP3434383A1 (fr) * 2017-07-24 2019-01-30 Primetals Technologies Austria GmbH Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir
WO2019102841A1 (fr) 2017-11-21 2019-05-31 株式会社オートネットワーク技術研究所 Réacteur
DE102019105598A1 (de) * 2019-03-06 2020-09-10 Hydro Aluminium Rolled Products Gmbh Verfahren zur Herstellung eines Aluminiumbands mit hoher Festigkeit und hoher elektrischer Leitfähigkeit

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CN117980083A (zh) 2024-05-03
DE102021208437A1 (de) 2023-02-09
EP4380736A1 (fr) 2024-06-12

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