EP4380736B1 - 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

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Publication number
EP4380736B1
EP4380736B1 EP22735373.7A EP22735373A EP4380736B1 EP 4380736 B1 EP4380736 B1 EP 4380736B1 EP 22735373 A EP22735373 A EP 22735373A EP 4380736 B1 EP4380736 B1 EP 4380736B1
Authority
EP
European Patent Office
Prior art keywords
rolling
casting
strip
melt
thickness
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP22735373.7A
Other languages
German (de)
English (en)
Other versions
EP4380736C0 (fr
EP4380736A1 (fr
Inventor
Markus Fischer
Guido Fick
Michael Schäfer
Michael Breuer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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Filing date
Publication date
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Publication of EP4380736A1 publication Critical patent/EP4380736A1/fr
Application granted granted Critical
Publication of EP4380736B1 publication Critical patent/EP4380736B1/fr
Publication of EP4380736C0 publication Critical patent/EP4380736C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • 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
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • 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
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B2001/225—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 plates, strips, bands or sheets of indefinite length by hot-rolling
    • 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-rolling process.
  • a process for producing can body sheet which comprises the continuous hot rolling of a hot aluminum feed stock to reduce its thickness, the coiling of the hot-rolled, still-hot feed stock, and the holding of the feed strip, which has been reduced in thickness in the hot state, at or near the initial temperature of the hot rolling. Subsequently, the hot-coiled feed stock is uncoiled again, and immediately thereafter, the annealed feed stock is rapidly quenched to a temperature suitable for cold rolling. The process is carried out as a continuous "in-line" process.
  • the invention is based on the object of providing a method of the type mentioned above, with which a high proportion of aluminum scrap can be processed as an aluminum raw material or starting material for the production of aluminum strip of an industrially usable quality. Finally, the invention is based on the object of providing a casting and rolling plant particularly suitable for the method according to the invention.
  • Casted in the context of the present invention means that the casting process and the rolling process are linked in terms of process technology and material flow. Depending on the design of the melting unit, the melting of the aluminum raw material, the casting, and the rolling can also take place continuously, with the material flow rate always determined by the strip speed during casting.
  • the alloy composition of the melt can be determined continuously or batchwise.
  • the results of the alloy composition analysis can be fed online, preferably in real time, to a control and/or regulation system of a casting and rolling mill.
  • a suitable method for analyzing the alloy composition of the melt is, for example, spectral analysis, X-ray measurement, or a similar known measurement method.
  • the aluminum raw material used is preferably a mixture of electrolytically produced pure aluminum or primary aluminum and aluminum scrap.
  • the aluminum raw material may contain impurities such as iron, copper, silicon, chromium, magnesium, manganese, nickel, zinc, and tin.
  • the melt is continuously fed to the at least one strip casting machine via a pouring trough, whereby the melt can be filtered to remove any impurities.
  • Continuously feeding the melt into the strip casting machine has the advantage that the melt level upstream of the casting nozzle is largely constant, allowing relatively constant casting conditions to be established. This allows the melting process to be directly coupled with the casting-rolling process.
  • At least one forming parameter is selected from a group of parameters comprising a thickness reduction of the hot strip, a width reduction 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 bending, 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 material hardness of the cast strip, and thus the forming resistance during rolling changes depending on the impurity content, and the properties of the hot strip change accordingly after rolling.
  • the force and work requirements as well as other forming parameters during rolling can be adjusted accordingly. These adjustments can also include influencing the strip geometry, influencing the rheological roll gap conditions, and influencing the material properties of the aluminum strip or the hot strip, for example, through cooling and lubrication devices.
  • control comprises a pre-control of the rolling mill for a given and/or selected strip length section of the hot strip depending on the alloy composition determined according to method step b).
  • the pre-control includes the specification of at least one setpoint for a thickness and/or profile control of at least one rolling device.
  • Experimental studies with comparative analyses have determined mathematical relationships between changes in the alloy composition and the forming resistances occurring during rolling.
  • casting parameters such as the casting thickness, the casting speed and the casting belt temperature can be adjusted using control technology.
  • the constant is the fundamental factor within the alloy group.
  • the exponents serve as exponents of the alloy's content of the respective element.
  • the material hardness H due to the alloy change can be calculated by inserting the contents. This allows for the advance calculation of the rolling force change and thus pre-control, for example, of the setting position of the work rolls of a rolling mill to produce the (originally) intended rolled product.
  • the aluminum alloy can be selected from a group comprising the aluminum alloys AA2 XXX, AA5XXX, AA6 XXX, and AA7 XXX. These alloy groups contain multiple alloying components and are used for applications in the electrical and automotive industries, among others.
  • the casting of the melt into a cast strip is carried out using at least one casting machine with a traveling mold.
  • the traveling mold of the strip casting machine can be designed as a rotating belt (so-called belt caster) or as rotating blocks (so-called block caster).
  • a strip casting machine is therefore understood to be a casting machine that produces strip-shaped casting material. It is advantageous that the casting takes place at an increased cooling rate and thus, compared to conventional slab casting machines, at a higher solidification rate, whereby impurities are partially kept in solution during casting.
  • the fact that the melt solidifies without movement relative to the mold results in very intensive heat transfer and the melt can solidify relatively quickly, which is particularly advantageous because it keeps impurities in the melt partially in solution.
  • a temperature control device can be provided, either by increasing or cooling the temperature of the casting strip before rolling.
  • 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 quenching is particularly advantageous to prevent coarse grain formation in the microstructure.
  • an abrasive surface conditioning is preferably provided for the top and/or the bottom of the cast hot strip in order to be able to remove contaminants from the strip surface on each side.
  • a further aspect of the invention relates to a casting-rolling plant for producing 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 regulating and/or control device for regulating and/or Control of 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 a moving mold.
  • At least one multi-chamber melting furnace can be provided as the melting unit.
  • the work rolls can be designed as so-called CVC (Continuous Variable Crown) rolls with a crowned contour.
  • CVC Continuous Variable Crown
  • the casting and rolling plant according to the invention advantageously comprises at least one trimming shear, which is arranged behind a rolling device and in front of a coiler. This serves to precisely adjust the width of the finished rolled strip and to remove tight strip edges or edge cracks.
  • the casting-rolling device comprises means for surface conditioning the cast hot strip, for example in the form of brushing devices, means for applying high-pressure liquid media to the hot strip, or the like.
  • These means are preferably arranged upstream of the rolling devices in the transport direction of the hot strip.
  • the casting and rolling plant may further comprise means for cooling the rolled strip behind the rolling mill or behind a final rolling device.
  • the casting-rolling plant according to the invention preferably comprises at least two rolling devices or rolling stands arranged directly one behind the other.
  • the distance between the rolling mills and the at least one strip casting machine can be between 5 m and 20 m. This compact arrangement prevents precipitation processes in the rolled stock.
  • the casting-rolling plant according to the invention preferably comprises a scrap return system of process scrap to a storage level of the melting units
  • FIG. 1 shows a casting and rolling plant 1 for producing aluminum strip 2 according to the method according to the invention.
  • the casting and rolling plant 1 comprises several melting units 4 for producing a melt 3 of aluminum.
  • the melting units 4, which are only shown schematically, can be designed, for example, as multi-chamber melting furnaces.
  • the melting units 4 are fed with an aluminum raw material from a storage level 5, on which, among other things, aluminum scrap is stored in various scrap storage areas A, B, C, D.
  • the aluminum scrap consists, for example, of a It consists of can scrap obtained from waste management and partly from process scrap generated in the process described below.
  • the casting and rolling plant 1 further comprises a strip casting machine 6, which is designed, for example, as a so-called belt caster or block caster for producing cast strip 7, as well as two rolling stands 15 arranged downstream in the transport direction, with which the thickness of the aluminum strip 2 is reduced.
  • the rolling stands 15 are arranged at a short distance of between 5 m and 20 m in the transport direction behind the strip casting machine 6.
  • a device 11 for surface cleaning the cast aluminum strip 2 and a cropping shear 12 for severing the cast strip head and/or tail that arises during the casting of the aluminum strip 2 and cannot be further processed.
  • the rolling stands 15 each comprise two driven work rolls and two backup rolls, as well as a hydraulic adjustment system for the work rolls, via which the roll pitch can be adjusted.
  • the rolling stands 15 also each comprise a work roll bending system and means for axial adjustment of the work rolls.
  • the aluminum melt 3 produced by the melting units 4 is fed to the strip casting machine 6 via a pouring trough 8 with a controlled mass flow.
  • a flow regulator 9 is provided in the pouring trough 8, to which a filter 10 for filtering Impurities of the melt 3 are arranged downstream.
  • the melt can thus be fed to the casting machine continuously, enabling a quasi-continuous casting-melting-rolling process.
  • a strip cooling device 18 is arranged downstream of the two rolling stands 15 forming the rolling mill 14, followed by a trimming shear 19. This is followed by a flying shear 21.
  • two reels 23 are provided for winding up the rolled aluminum strip.
  • Further scrap bunkers 13B and 13C are arranged downstream of the trimming shear 19 and downstream of the flying shear 21, from which the process scrap can be fed via the system for process scrap 25.
  • the material cuts collected in the scrap bunkers 13A, 13B and 13C can be fed as sorted scrap to the respective scrap storage areas A, B, C, D on storage level 5.
  • the Process Scrap 25 system can be provided with scrap logistics that can be automated, semi-automated or manually operated.
  • the aluminum scrap pre-sorted in scrap storage areas A, B, C, and D is first subjected to a two-stage melting process in melting units 4.
  • the scrap is first heated until any paint and other organic compounds present evaporate.
  • the steam can be further used, for example, as an energy source.
  • the aluminum is then melted down.
  • the chemical composition of the melt is analyzed; for example, the proportion of metallic impurities in the form of iron, copper, silicon, chromium, magnesium, manganese, nickel, zinc, and tin is determined.
  • the alloy composition is recharged to achieve specific desired properties.
  • appropriate portions of process scrap and/or pure aluminum are fed from storage level 5 or from scrap storage areas A, B, C, and D.
  • the temperature of the melt is adjusted, among other things, by the proportion of scrap added.
  • the adjusted melt is fed to the strip casting machine 6 via the pouring trough 8 with a controlled mass flow.
  • the melt passes through the filter 10, which filters out any impurities in the melt.
  • a pouring nozzle (not further specified) guides the melt into the solidification zone.
  • the mold of the strip casting machine 6 is designed as a traveling mold.
  • the melt solidifies without any relative movement to the mold. This results in very intensive heat transfer and the melt can solidify relatively quickly.
  • the melt is cast as a casting strip 7 with a thickness of 10 mm to 30 mm, particularly preferably with a thickness of 15 to 25 mm, at a casting speed of 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, for example, iron, copper, silicon, chromium, nickel, zinc, and tin.
  • the alloy components remain largely in solution. This makes the casting process more tolerant of impurities.
  • the rigid, moving mold of the strip caster 6 prevents detachment of the solidifying strand. Heat transfer remains consistently high.
  • the solidified cast strip 7 is fed directly to the rolling mill 14 and reduced in thickness to aluminum strip 2. Due to the fact that only a relatively small distance is provided between the rolling mill 14 and the strip casting machine 6, as already explained above, precipitation processes in the rolled material are prevented.
  • the pass reduction per roll stand 15 is preferably between 25% and 70% per roll stand. This converts the cast structure of the cast strip 7 into a rolled structure of the aluminum strip 2, creating a rolled texture 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.
  • control of the rolling mill is provided as a function of the alloy composition of the melt 3, which is determined via the analysis device 40 and fed to a control and/or regulating device designated 50.
  • This controls the actuators of the rolling stands 15 accordingly, wherein a pre-control of the rolling mill 14 is expediently provided for a given or selected strip length section of the cast strip 7.
  • the pre-control comprises the specification of at least one setpoint for a thickness and/or profile control of at least one of the rolling stands 15.
  • a correction of the at least one thickness and/or profile control takes place as soon as the cast strip 7 with a specific known alloy composition enters the rolling mill 14.
  • the thickness, pass reduction, and width of the aluminum strip 2 are determined by various parameters that define the forming resistance. These parameters include the alloy composition, strip temperature, strip tension, roll lubrication, roll diameter, roll geometry (bend, crown), rolling force, and rolling torque.
  • the control device 50 accesses a process model 55, or alternatively, the calculation can be performed within the process model 55 and the results of the calculation can be converted in the control device into setting parameters of the casting-rolling mill 1.
  • the results of the analysis device 40 act on at least the rolling mill 14 for regulating and/or controlling, preferably independently of the casting process and the strip casting machine 6.
  • Process step a) refers to 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.
  • identical parts of the casting and rolling plant 1 are provided with the same reference numerals.
  • Reference numeral 60 designates a production planning and control module that is connected to the process model 55 in order to incorporate production specifications such as strip widths, target thicknesses, target structure, etc. into the calculation.
  • the production planning and control module 60 influences the composition of the melt 3, for example, via the target specification X, for example by appropriately supplying aluminum scrap from the various scrap storage locations A, B, C, D.
  • the subsequent analysis device 40 determines the proportion of impurities in the melt 3, which is fed as an input variable to the control device 50.

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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)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Claims (23)

  1. Procédé de fabrication d'une bande d'aluminium (2) dans un procédé couplé de coulée-laminage, comprenant les étapes suivantes :
    - fusion d'une matière première en aluminium comprenant au moins un alliage d'aluminium dans au moins une unité de fusion (4),
    - coulée du métal en fusion (3) pour former une bande coulée (7) au moyen d'au moins une machine de coulée à bande (6),
    - laminage de la bande à chaud dans une installation de laminage (14) comprenant au moins un dispositif de laminage pour transformer la bande à chaud afin d'en réduire l'épaisseur et/ou la largeur,
    caractérisé par les étapes suivantes :
    - détermination de la composition de l'alliage du métal en fusion (3), et
    - régulation et/ou commande d'au moins un paramètre de formage de l'installation de laminage (14) en fonction de la composition de l'alliage du métal en fusion (3).
  2. Procédé selon la revendication 1, caractérisé en ce que le procédé de coulée-laminage est réalisé comme un procédé continu.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce qu'au moins un paramètre de formage est choisi parmi un groupe de paramètres comprenant réduction d'épaisseur de la bande à chaud, réduction de largeur de la bande à chaud, température de bande de la bande à chaud, vitesse de laminage, tension de bande de la bande à chaud, force de laminage, cambrure des cylindres, réglage axial d'au moins un cylindre, géométrie de l'entrefer, couple de laminage, refroidissement des cylindres, lubrification des cylindres.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la régulation comprend une commande anticipée de l'installation de laminage (14) pour une section de longueur de bande donnée et/ou sélectionnée de la bande coulée, en fonction de la composition de l'alliage déterminée après l'étape b).
  5. Procédé selon la revendication 4, caractérisé en ce que la commande anticipée comprend la définition d'au moins une consigne pour une régulation d'épaisseur et/ou de profil d'au moins un dispositif de laminage.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le métal en fusion (3) comprend une fraction recyclée, de préférence sous forme de déchets d'aluminium, d'au moins 60 % en poids, de préférence au moins 70 % en poids, plus préférablement au moins 85 % en poids et tout particulièrement au moins 95 % en poids.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'alliage d'aluminium est choisi dans un groupe comprenant les alliages d'aluminium AA2XXX, AA5XXX, AA6XXX et AA7XXX.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la coulée du métal en fusion (3) pour former une bande coulée (7) s'effectue avec une épaisseur de 10 mm jusqu'à une épaisseur de 30 mm.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la coulée est réalisée à une vitesse de 4 m/min à 16 m/min.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé par un conditionnement abrasif de la surface supérieure et/ou inférieure de la bande coulée.
  11. Procédé selon l'une des revendications 1 à 10, caractérisé en ce que le laminage est effectué à une température de 150 °C à 600 °C, de préférence de 300 °C à 500 °C, et avec une réduction d'épaisseur de 20 % à 75 % par cage de laminage, par rapport à l'épaisseur initiale de la bande à chaud.
  12. Procédé selon l'une des revendications 1 à 11, caractérisé en ce que la coulée du métal en fusion (3) est réalisée à l'aide d'au moins une machine de coulée équipée d'une lingotière mobile.
  13. Procédé selon l'une des revendications 1 à 12, caractérisé par un fonctionnement en parallèle de plusieurs unités de fusion (4), de préférence avec des compositions d'alliage différentes.
  14. Procédé selon l'une des revendications 1 à 13, caractérisé par le mélange de métaux en fusion (3) ayant des compositions d'alliage différentes.
  15. Procédé selon l'une des revendications 1 à 14, caractérisé par le réglage de la température de la bande coulée (7) avant le laminage.
  16. Procédé selon l'une des revendications 1 à 15, caractérisé par la trempe de la bande à chaud en aval de l'au moins un dispositif de laminage.
  17. Installation de coulée-laminage (1) pour la fabrication de bande d'aluminium (2), notamment pour la mise en œuvre du procédé selon l'une des revendications 1 à 16, comprenant au moins une unité de fusion (4), au moins une machine de coulée à bande (6) et au moins un dispositif de laminage, caractérisée par des moyens de détermination de la composition d'alliage d'un métal en fusion ainsi que par au moins un dispositif de régulation et/ou de commande (50) pour la régulation et/ou la commande d'au moins un paramètre de formage de l'au moins un dispositif de laminage en fonction de la composition de l'alliage du métal en fusion (3).
  18. Installation de coulée-laminage (1) selon la revendication 17, caractérisée en ce que la machine de coulée à bande (6) est conçue comme une machine de coulée équipée d'une lingotière mobile.
  19. Installation de coulée-laminage 1 selon l'une des revendications 17 ou 18, caractérisée en ce qu'au moins un four de fusion à plusieurs chambres est prévu comme unité de fusion 4.
  20. Installation de coulée-laminage (1) selon l'une des revendications 17 à 19, caractérisée par une pluralité de cages de laminage (15), lesquelles comprennent de préférence au moins deux cylindres de travail et deux cylindres de soutien ainsi qu'au moins deux vérins hydrauliques de réglage pour l'ajustement de l'entrefer.
  21. Installation de coulée-laminage (1) selon l'une des revendications 17 à 20, caractérisée par des moyens de conditionnement abrasif de la surface de la bande coulée, lesquels sont de préférence disposés, dans le sens de transport, en amont de l'au moins un dispositif de laminage.
  22. Installation de coulée-laminage (1) selon l'une des revendications 17 à 21, caractérisée par au moins une cisaille de rives (19) disposée en aval d'un dispositif de laminage et en amont d'un enrouleur (23).
  23. Installation de coulée-laminage (1) selon l'une des revendications 17 à 22, caractérisée par un système de retour de déchets de process vers un niveau de stockage (5) des unités de fusion (5).
EP22735373.7A 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 Active EP4380736B1 (fr)

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
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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US (1) US20250121429A1 (fr)
EP (1) EP4380736B1 (fr)
CN (1) CN117980083A (fr)
DE (1) DE102021208437A1 (fr)
WO (1) WO2023011790A1 (fr)
ZA (1) ZA202400907B (fr)

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WO2025131409A1 (fr) * 2023-12-20 2025-06-26 Sms Group Gmbh Installation de coulée et de laminage combinée pour la mise en forme primaire d'un matériau de laminage métallique et le laminage à chaud d'une bande de matériau, et procédé pour la mise en forme primaire d'un matériau de laminage métallique et pour le laminage à chaud direct
WO2025131410A1 (fr) * 2023-12-20 2025-06-26 Sms Group Gmbh Dispositif de laminage à chaud, procédé de laminage à chaud et installation pour la production et/ou le traitement d'une pièce métallique
DE102024126753A1 (de) * 2024-09-17 2026-03-19 Sms Group Gmbh Anlage und Verfahren zum Herstellen eines Materialbands, System zum Betreiben einer derartigen Anlage, Verwendung eines Stell- und/oder Messglieds, Verwendung einer Bearbeitungsvorrichtung, Verwendung einer Bandgießvorrichtung sowie Verwendung einer Bereitstellvorrichtung
DE102024126754A1 (de) * 2024-09-17 2026-03-19 Sms Group Gmbh Anlage und Verfahren zum Herstellen eines Materialbands, Anordnung aus Manipulationsvorrichtungen zum Manipulieren einer Bandgeschwindigkeit sowie Verwendung einer Treibrolleneinheit

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US5356495A (en) 1992-06-23 1994-10-18 Kaiser Aluminum & Chemical Corporation Method of manufacturing can body sheet using two sequences of continuous, in-line operations
US6789602B2 (en) * 2002-02-11 2004-09-14 Commonwealth Industries, Inc. Process for producing aluminum sheet product having controlled recrystallization
ES2797023T3 (es) * 2014-12-19 2020-12-01 Novelis Inc Aleación de aluminio adecuada para la producción a alta velocidad de botella de aluminio y proceso de fabricación de la misma
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
JP6808177B2 (ja) 2017-11-21 2021-01-06 株式会社オートネットワーク技術研究所 リアクトル
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
EP4380736C0 (fr) 2025-08-06
EP4380736A1 (fr) 2024-06-12
ZA202400907B (en) 2025-02-26
US20250121429A1 (en) 2025-04-17
DE102021208437A1 (de) 2023-02-09

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