EP3993921B1 - Alimentation de matière en fusion pour installations de coulée à bande - Google Patents

Alimentation de matière en fusion pour installations de coulée à bande Download PDF

Info

Publication number
EP3993921B1
EP3993921B1 EP20734983.8A EP20734983A EP3993921B1 EP 3993921 B1 EP3993921 B1 EP 3993921B1 EP 20734983 A EP20734983 A EP 20734983A EP 3993921 B1 EP3993921 B1 EP 3993921B1
Authority
EP
European Patent Office
Prior art keywords
casting
aluminium
strip
molten metal
gap
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
EP20734983.8A
Other languages
German (de)
English (en)
Other versions
EP3993921C0 (fr
EP3993921A1 (fr
Inventor
Kai-Friedrich Karhausen
Ralph Bock
Manfred Langen
Wolfgang Müller
Mark Badowski
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.)
Speira GmbH
Original Assignee
Speira 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 Speira GmbH filed Critical Speira GmbH
Publication of EP3993921A1 publication Critical patent/EP3993921A1/fr
Application granted granted Critical
Publication of EP3993921C0 publication Critical patent/EP3993921C0/fr
Publication of EP3993921B1 publication Critical patent/EP3993921B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B22D11/10—Supplying or treating 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/0806—Charging or discharging devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B2014/008—Continuous casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/0806—Charging or discharging devices
    • F27B2014/0818—Discharging

Definitions

  • the invention relates to a strip casting plant comprising at least one casting furnace and at least one rotating mold with a casting gap, in particular a pair of rollers, rolls, caterpillars or strips.
  • the invention further relates to a method for feeding an aluminum or aluminum alloy melt to the casting gap in a strip casting plant.
  • Strip casting using strip casting systems is an economical and energy-efficient alternative to the conventional production of metal strips via ingot casting, reheating and hot rolling.
  • a hot strip is produced close to the final dimension directly from a molten metal.
  • the molten metal is cast in a strip casting system in which the casting area or solidification area in which the cast strip is formed is delimited on at least one long side by a barrier that is continuously moved and cooled during the casting process. This barrier moves along with the solidifying strip, so that a so-called traveling mold is provided. Traveling molds allow a high casting and solidification speed. In industrial production, there are a large number of designs of such traveling molds, for example casting wheel processes or single-roll processes.
  • travelling mold in the form of caterpillar molds (block casting) are also used, in which cooling blocks, usually made of copper, are arranged on chain segments. These are usually tilted slightly against the horizontal.
  • the problem with the known strip casting processes is that a variable solidification front can arise across the width of the strip produced, which can lead to non-uniform product properties. For example, surface defects, segregation of alloy elements or a non-uniform grain structure can arise. Locally unsolidified molten metal can even get through the casting gap and cause the strip to break and thus the process to be terminated. These problematic effects become more critical with larger strip widths, which are particularly relevant for high process efficiency. For all strip casting processes, the uniform supply of the melt into the casting gap or the solidification zone of the rotating mold is therefore very important.
  • the molten metal which is usually fed via an open channel system from a higher-lying casting furnace, is therefore calmed down in an open tundish (intermediate vessel) before the casting gap.
  • the molten metal is first collected in the tundish and then fed from the tundish to the casting gap by gravity.
  • the level of the melt pool in the casting area in front of the mold can be regulated via the tundish, for example by means of a plug provided in the bottom of the tundish.
  • Such a strip casting plant for carrying out a vertical two-roll process is known, for example, from WO 2004-000487 known.
  • a strip casting plant with tundish is in the EP 0 433 204 A1 described.
  • the present invention therefore has the object of providing a strip casting plant which, on the one hand, enables improved control of the volume flow of the aluminum or aluminum alloy melt to the casting gap, improved productivity and improved strip quality and, at the same time, allows for increased safety.
  • a corresponding method is to be proposed.
  • this object is achieved in a strip casting plant according to the invention in that the strip casting plant has at least one active means for transporting molten metal from the casting furnace to the casting gap.
  • an active means for transporting molten metal from the casting furnace to the casting gap is understood to be a means that is designed to use energy to transport the molten metal so that the transport of the molten metal can be controlled via the active means.
  • the active means for transporting molten metal can transfer energy to the molten metal mechanically, electrically or electromagnetically, for example.
  • the drive work of the pump can be converted into kinetic energy of the molten metal by means of a pump, or energy can be transferred to the molten metal by applying pressure and converted into kinetic energy of the molten metal.
  • Active means for transporting molten metal are suitable, for example, for moving the molten metal at least partially against the direction of gravity.
  • the volume flow of the molten metal can be controlled very precisely.
  • the molten metal can be fed into a controlled, continuous solidification process.
  • the molten metal can be fed very smoothly and in a controlled manner, in particular the breaking up of an oxide layer in the feeding process and thus the introduction of impurities into the melt can be avoided.
  • the costly use of inert gas to prevent the formation of an oxide layer can therefore be dispensed with.
  • a tundish can be provided, a tundish, which is generally provided in conventional melt feeding to calm the molten metal, can preferably be dispensed with.
  • the productivity of the strip casting plant according to the invention can be increased compared to a conventional strip casting plant, since the strip speed is usually set as slow as the hottest point in the strip allows for safety reasons.
  • the strip casting plant according to the invention thus allows the production of a high-quality aluminum alloy strip close to the final dimension.
  • the active means for transporting the molten metal can also improve the safety of operating the strip casting plant.
  • the travelling mould of the strip casting plant according to the invention can, for example, be a travelling mould of one of the conventional processes described at the beginning.
  • the travelling mould is thus a pair of rollers, rollers, tracks or belts.
  • a pair of rollers arranged parallel to one another on the axis of a vertical twin roll caster a pair of rollers arranged parallel to one another on the axis of arranged pair of rollers of a horizontal or tilted twin roll caster, two casting chains rotating one above the other (e.g. Hazelett) or caterpillar molds, which are held by a machine frame or arranged in a housing.
  • the rotating mold has a casting gap as described above.
  • the casting gap can, for example, be up to 2.5 m wide, so that particularly wide metal strips over 1.6 m wide can be produced; the possible strip width can therefore be close to one roll width, for example around 2.5 m.
  • the casting gap can, for example, be 1 to 6 mm high, so that metal strips of a corresponding thickness can be produced.
  • the molten metal is cooled in contact with the rotating mold at a cooling rate of in particular at least 20 K/s, preferably 50 K/s.
  • significantly higher cooling rates can be set, particularly preferably a cooling rate of at least 100 K/s and/or up to 8000 K/s.
  • the high solidification rate can further reduce segregation processes that have a detrimental effect on the material properties.
  • the strip speeds at which the cast metal strip emerges from the casting gap can be set in the range of 0.06 to 3.0 m/s.
  • the metal strip can then be wound up in a coil, for example, and fed to a subsequent cold rolling process on a cold rolling stand, or it can be hot and/or cold rolled in-line without intermediate winding.
  • the metal strip can also be aged between strip casting and cold rolling.
  • the casting furnace can be designed as a container for the temporary storage of molten metal or the casting furnace can be designed as a melting furnace for melting molten metal.
  • the casting furnace can be heated and/or controlled.
  • the at least one active means for transporting molten metal comprises a means for pressurizing and/or a means for pumping the molten metal.
  • a means for applying pressure is understood to mean a means that is designed to apply pressure to the molten metal in order to transport the molten metal from the casting furnace to the casting gap.
  • the surface of a molten metal pool in a storage facility for molten metal can be subjected to pressure.
  • a means for applying pressure can therefore comprise a pressure chamber, for example.
  • a pressure chamber is in particular a preheated or heatable closed, i.e. pressure-tight chamber in which molten metal can be provided and subjected to pressure.
  • the pressure chamber can be provided by a low-pressure furnace in which the molten metal can be heated and pressed into a riser pipe, for example by applying pressure. This design enables a particularly smooth and gentle melt flow and a simple control of the volume flow of the molten metal, for example via the set overpressure on the surface of the molten metal pool.
  • a means for pumping the molten metal can be provided.
  • a means for pumping the molten metal can comprise, for example, a metal pump.
  • a metal pump can transport the molten metal mechanically, for example by means of a screw.
  • an electromagnetic metal pump is used in order to transport the molten metal as quietly and evenly as possible.
  • strip casting plant fails, for example due to a power failure, no further molten metal is pumped and run-on can also be avoided.
  • the at least one active means for transporting molten metal comprises a pressure furnace, in particular a low-pressure furnace.
  • a pressure furnace is in particular a closed furnace that provides a heatable chamber that can be pressurized. If the chamber is pressurized with low pressure, it is a low-pressure furnace. The use of low pressure enables the molten metal to be guided and regulated safely and smoothly.
  • a low-pressure furnace is designed, for example, to allow a pressurization of 0.1 to 1.0 bar. Preferably a pressurization of 0.3 to 0.6 bar for the smoothest possible transport of the molten metal or 0.5 to 1.0 bar for a faster supply of the molten metal to the casting gap.
  • the pressure or low-pressure furnace also has a riser pipe, a particularly safe strip casting system is provided because the molten metal can automatically sink back into the pressure chamber through the riser pipe if the pressurization fails.
  • the casting furnace can be designed separately from the active means for transporting molten metal.
  • the casting furnace is designed as a low-pressure furnace.
  • Further active means for transporting the molten metal can then be dispensed with, for example.
  • the simpler design also enables simplified and therefore improved control of the volume flow and increased safety of the strip casting system.
  • the strip casting plant is a vertical strip casting plant. It has been found that the supply of molten metal to the casting gap provided according to the invention can be used particularly advantageously for vertically aligned strip casting plants in which a casting area or casting gusset is arranged above the casting gap. In vertical strip casting plants in particular, the conventional supply of molten metal from above to the casting gap leads to the uncontrolled formation of oxides in the upstream tundish, which can enter the casting gap uncontrolled via the outlet from the tundish.
  • the strip casting plant has means for regulating the volume flow of the molten metal to the casting gap and/or the height of the melt level in the casting gap.
  • the supply of the molten metal via active means for transporting the molten metal can be used advantageously to enable precise and rapid control of the volume flow of the molten metal to the casting gap.
  • the volume flow can be controlled very precisely.
  • the volume flow of the molten metal can then be set and controlled very precisely by measuring the pressure and regulating the pressure accordingly.
  • a control circuit can have a computer that is set up to regulate the pressure for optimal operation, for example according to a known or determined correlation of pressure and required volume flow for a strip casting speed to be achieved.
  • pressure sensors can be provided to measure the pressure in a pressure chamber or a low-pressure furnace.
  • the volume flow by measuring the fill level of the molten metal, for example in the casting area or casting gusset.
  • both the fill level of the molten metal in the casting area or casting gusset and the pressure in a pressure chamber can be measured.
  • a fast, closed control loop can be set up using such a combined measurement.
  • the casting area or casting gusset can have at least one fill level sensor and a low-pressure furnace can have at least one pressure sensor.
  • existing pressure sensors can also be used, for example in low-pressure furnaces.
  • the fill level or level of molten metal can be detected, for example, using non-contact eddy current distance sensors, induction probes, image-optical methods, contact probes or immersion sensors.
  • the level is preferably determined using laser measurement, for example the casting area can have at least one laser distance sensor.
  • the strip casting plant has a casting area arranged in front of the casting gap.
  • the casting area is arranged in front of the moving mold and is limited by the moving mold.
  • the casting area is, for example, a casting gusset and/or a distributor nozzle.
  • the casting area can be designed as a casting gusset, whereby the casting area or the casting gusset is limited by the moving mold and at least one side dam is formed, preferably two side dams, which are arranged opposite each other on either side of the moving mold.
  • a melt pool is formed during the production of a metal strip, from which molten metal flows or is drawn into the roll gap.
  • the casting area or casting gusset is arranged essentially above the casting gap and is limited by the upper area of the moving mold.
  • the casting area is arranged to the side of and in particular slightly higher than the casting gap.
  • the pouring area or pouring gusset enables a particularly uniform distribution of the molten metal over the entire width of the rotating mold as well as the continuous supply of the molten metal to the pouring gap via the melt pool formed in the pouring area.
  • a distribution nozzle can also be provided, through which the molten metal can be fed to the casting gap and distributed over the entire width of the casting gap.
  • the distribution nozzle is closed, for example, until just before the casting gap, so that the molten metal is only briefly exposed to the air or not at all.
  • the casting area is essentially formed by the rotating mold and the ends of the distribution nozzle or only by the distribution nozzle, so that additional side dams can be completely or partially dispensed with.
  • the casting furnace is connected to the casting area by a pipe system.
  • the casting furnace is connected to the casting gusset and/or the distributor nozzle by a pipe system.
  • the closed connection between the casting furnace and the casting area in the form of a pipe system ensures that the molten metal is guided to the casting area does not lead to uncontrolled oxidation of the surface of the molten metal.
  • the pipe system also enables particularly smooth and controllable guidance of the molten metal from the casting furnace to the casting area. If the pipe system is also an essentially air-tight and/or gas-tight pipe system, uncontrolled oxidation of the molten metal can be avoided even better.
  • molten metal can also be guided at least partially against gravity in a safety-related manner.
  • the strip casting plant or the pipe system preferably comprises at least one heatable pipe and/or at least one ceramic pipe, particularly preferably at least one heatable ceramic pipe. Premature solidification of the molten metal can thus be avoided. Even more preferably, the pipe system only has heatable pipes, in particular heatable ceramic pipes.
  • the strip casting plant comprises means for feeding the molten metal into the casting area, via which the molten metal can be fed to the casting area below the surface of a melt pool formed in the casting area.
  • the means for feeding the molten metal into the casting area are designed in such a way that the molten metal can be fed into the casting area below the surface of a melt pool, the surface of the melt pool can be kept even calmer. Breaking through the surface of the melt pool is avoided. On the one hand, this can prevent uncontrolled formation of oxides. On the other hand, uncontrolled mixing of oxides can also be effectively avoided because turbulence on the surface or movement of the surface can be avoided. This can prevent an oxide layer that has formed from being drawn in and mixed in in an uncontrolled manner.
  • the casting area has at least one side dam, wherein the at least one side dam has at least one feed opening for molten metal.
  • the pouring area is a pouring gusset.
  • the at least one feed opening is also advantageously arranged in such a way that it is below the surface of the melt pool formed in the casting nip during operation of the strip casting system, breaking through the surface of the melt pool, disruptions to the surface of the melt pool and turbulences can be particularly successfully avoided.
  • This form of feed has proven to be particularly advantageous in vertical strip casting systems in particular.
  • the casting area has at least two, preferably three feed openings for a metal melt.
  • the formation of a pronounced temperature gradient parallel to the casting gap can be avoided in a melt pool, so that a particularly uniform solidification of the metal melt in the casting gap can be achieved.
  • the at least two, preferably three feed openings can preferably be arranged in the bottom of the casting area, so that the metal melt can be fed to the casting area from below, essentially against the direction of gravity. More preferably, the at least two feed openings are arranged essentially at opposite ends of the casting area in the width direction.
  • a third feed opening is arranged, for example, centrally between two other feed openings.
  • the pouring area can also be pressurized with inert gas to prevent the formation of oxides on the surface of the melt pool.
  • the above-mentioned object is achieved in a method according to the invention for feeding a molten metal to the casting gap in a strip casting plant in that the molten metal is actively transported into the casting gap.
  • the volume flow of the molten metal can be regulated very precisely. This allows the molten metal to be fed into a controlled, continuous solidification process.
  • the molten metal can in particular be fed very smoothly and in a controlled manner, in particular the breaking up of an oxide layer in the feeding process and thus the introduction of impurities into the melt can be avoided.
  • the molten metal can for example be fed to the melt pool in such a way that the surface of the melt pool is not broken through or disturbed by bath movements.
  • the method can be carried out with a strip casting plant according to the invention.
  • the at least one casting furnace is pressurized to transport the molten metal.
  • the surface of a melt pool in the casting furnace can be pressurized.
  • the casting furnace is preferably a low-pressure furnace in which the molten metal is heated and pressed into a riser pipe, for example, by applying pressure. This embodiment enables particularly smooth and gentle melt flow and simple control of the volume flow of the molten metal, for example via the set overpressure.
  • the molten metal is transported at least in sections against the direction of gravity. Guiding the molten metal at least in sections against the direction of gravity enables a particularly controllable and adjustable volume flow of the molten metal. In addition, if the system fails, the molten metal can fall back in the direction of gravity, for example into a riser pipe and/or a casting furnace, so that the molten metal can no longer flow and work safety can be increased.
  • the strip casting system has a pouring gusset and/or a distributor nozzle arranged in front of the casting gap and the casting furnace is connected to the pouring gusset and/or the distributor nozzle by a pipe system, whereby the pipe system is or will be essentially completely filled with molten metal.
  • a pipe system whereby the pipe system is or will be essentially completely filled with molten metal.
  • the molten metal is fed into the melt pool below the surface of the melt pool.
  • a melt pool is or will be formed in front of the casting gap and the molten metal is fed into this melt pool below the surface of the melt pool. This can prevent the surface of the melt pool from being broken through and/or swirled, which could lead to uncontrolled mixing of oxides into the molten metal.
  • the molten metal can also be fed into the melt pool from the side and/or from below.
  • the molten metal is preferably fed into the melt pool or continuously fed into the casting gap, i.e. in particular without intermediate storage of molten metal in a tundish.
  • Fig.1 shows a strip casting plant 1 comprising a moving mold 2 with a casting gap 21, wherein the moving mold 2 is formed by two rollers 22, 23, and a casting furnace 3, wherein the strip casting plant 1 has an active means 4 for transporting molten metal 5 from the casting furnace 3 to the casting gap 21.
  • the strip casting plant 1 here is a vertical strip casting plant 1.
  • the active means 4 for transporting molten metal 5 in this example comprises a means 4 for pressurizing the molten metal 5 so that it can be actively transported from the casting furnace 3 to the casting gap 21 by the active means 4.
  • the casting furnace 3 is designed as active means 4, in particular designed as a low-pressure furnace 4.
  • the exemplary strip casting plant 1 has a casting area 6 arranged in front of the casting gap 21, which is designed as a casting gusset 6 and is arranged above the casting gap 21.
  • the casting furnace 3, 4 is connected to the casting gusset 6 by a pipe system 42, 43, which comprises heatable ceramic pipes 42, 43.
  • the casting gusset 6 has two side dams 62, wherein one side dam 62 has a feed opening 46 for the molten metal 5.
  • the feed opening 46 is provided as a means 46 for feeding the molten metal 5 into the casting gusset 6, via which the molten metal 5 can be fed to the casting area 6 below the surface of the melt pool 52 formed in the casting area.
  • the exemplary strip casting plant 1 thus comprises means 46 for feeding the molten metal 5 into the casting area 6, which can feed the molten metal 5 to the casting area 6 below the surface of a melt pool 52 formed in the casting area 6.
  • the molten metal 5 here is, for example, an aluminum melt 5.
  • the molten metal 5 can be transported via the riser pipe 43 and the heated pipe 41 to the casting area 6 against the direction of gravity G. This enables a particularly quiet and gentle melt flow to the melt pool 52, without the surface of the melt pool 52 being broken or disturbed by movements of the surface or turbulence of the molten metal. Because the molten metal 5 is transported against gravity, the exemplary strip casting system 1 is designed to be very safe, since the molten metal 5 falls back into the low-pressure furnace 3, 4 in particular through the riser pipe 43 in the event of a system failure.
  • the exemplary strip casting plant 1 has means for controlling the volume flow of the molten metal 5 into the casting gap 21 and/or the height of the melt level in the casting gap 21 in the form of a control loop.
  • the control loop uses measured values from a fill level sensor 61, which measures the fill level or Level of the melt pool 52 in the casting area 6 and also to a pressure sensor 31, which measures the pressure in the low-pressure furnace 3,4. If, for example, a drop in the fill level of the melt pool 52 is detected by the fill level sensor 61, the pressure in the low-pressure furnace 3,4 can be increased in a controlled manner in order to adjust the fill level to an optimal fill level again.
  • the exemplary strip casting system 1 can thus be actively and precisely controlled with fast response times.
  • Fig.2 shows in a perspective view the casting area 6 of the exemplary vertical strip casting plant 1 from Fig.1
  • the rotating mold 2 of the exemplary strip casting system 1 is formed by two rollers 22, 23.
  • the casting area 6 is designed here as a casting gusset 6 and is formed by the rollers 22, 23 of the rotating mold 2 and two side dams 62.
  • a side dam 62 has a feed opening 46 through which a metal melt 5 can be fed to the casting area 6 below the surface of a melt pool 52 formed in the casting area.
  • the tundish can be dispensed with, which in turn leads to oxide formation and the negative effects described, such as uncontrolled oxide entry into the melt.
  • Fig.3 shows a strip casting plant 1 not according to the invention comprising a travelling mold 2 with a casting gap 21, wherein the travelling mold 2 is formed by two (insulating block) chains 25, 26, and a casting furnace 3, wherein the strip casting plant 1 has an active means 4 for transporting molten metal 5 from the casting furnace 3 to the casting gap 21.
  • the strip casting plant 1 is here a horizontal or tilted strip casting plant 1.
  • the active means 4 for transporting molten metal 5 comprises in this example a means 4 for pumping the molten metal 5 in the form of an electromagnetic metal pump 4, so that the Metal melt 5 can be transported from the casting furnace 3 from below into the distributor nozzle 63.
  • the casting area 6 is formed, for example, by the closed distributor nozzle 63.
  • Fig.4 shows a further strip casting plant 1 according to the invention comprising a casting furnace 3 and a moving mold 2 with a casting gap 21, wherein the moving mold 2 is formed by two rollers 22, 23, wherein the strip casting plant 1 has an active means 4 for transporting molten metal 5 from the casting furnace 3 to the casting gap 21.
  • the strip casting plant 1 here is a horizontal or tilted strip casting plant 1.
  • the molten metal 5 is actively transported from below through the feed opening 46 into the casting area 6 via the metal pump 4.
  • a melt pool 52 is formed in the casting area 6 here.
  • Fig.5 shows an exemplary strip casting system, wherein the casting area 6 has at least three feed openings 46 for molten metal.
  • Two feed openings 46 are arranged in the width direction essentially at opposite ends of the casting area 6.
  • a third feed opening 46 is arranged centrally between the two other feed openings 46.
  • the molten metal 5 is actively transported from the casting furnace 3 via the metal pump 4 from below through the feed opening 46 into the casting area 6.
  • the feed from the furnace can be branched into several strands via the pipe 41 and fed through several pipes perpendicular thereto via several feed openings 46 to the casting area 6, in particular a casting gusset and/or a distributor nozzle, against the direction of gravity G.
  • melt can be fed into the distributor system at several points at the same time, for example, at the same temperature and speed, thus ensuring that a homogeneous, isothermal melt flows across the entire width in the outlet into the casting gap 21.
  • the described embodiments of the strip casting plant 1 enable the uniform supply of aluminum melt 5 into casting areas 6 or to casting gaps 21, so that the casting and rolling processes are stabilized, productivity is improved and material defects can be avoided.
  • This is achieved by feeding the molten metal 5 to the casting roll gap 21 below the surface of a molten metal pool 52, so that the surface of the existing molten metal pool 52 is not broken through or disturbed by bath movement. This avoids oxygen contact of the incoming molten metal 5 and thus reduces the total amount of oxides formed.
  • there is then, for example, an intact, calm oxide layer 54 on the surface of the molten metal pool 52 which is not mixed into the molten metal and which protects the molten metal pool 52 from further oxidation. This makes it possible to avoid non-metallic inclusions in the strip produced.
  • strip casting system 1 This allows the strip casting system 1 to be operated at optimum speed without the risk of local melt breakouts.
  • the strip quality can be kept consistent across the entire width. Uneven solidification across the width of the casting gap and, as a result, local melt breakouts through the casting gap, for example, can thus be avoided. This also prevents surface defects, cracks in the strip or casting breakages.
  • a melt introduced from below or from the side can be distributed in individual strands across the casting width, i.e. the width of the casting gap, so that a more homogeneous inflow with a uniform temperature and/or uniform speed to the casting gap can be achieved.
  • This can improve the uniformity of the product properties across the width of the strip and the productivity of the system can be further increased because the risk of local melt breakthroughs is reduced.
  • the exemplary embodiments described can also be advantageous for reasons of occupational safety. If problems occur in the molten area of the system, the transport system can be switched off and the residual melt in the system immediately falls with gravity G through the riser pipe 42 into the furnace. There is no further flow of melt into the casting area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Continuous Casting (AREA)

Claims (11)

  1. Système de coulée en bande (1) pour l'aluminium et/ou des alliages d'aluminium comprenant au moins un four de coulée (3) et au moins une lingotière tournante (2, 22, 23, 25, 26) avec une fente de coulée (21), l'au moins une lingotière tournante (2, 22, 23, 25, 26) étant conçue comme une paire de rouleaux (22, 23), de cylindres, de chenilles ou de bandes (25, 26), le système de coulée en bande (1) présentant au moins un moyen actif (4) pour le transport de masse fondue d'aluminium ou d'alliage d'aluminium (5) du four de coulée (3) à la fente de coulée (21),
    dans lequel le système de coulée en bande (1) présente une zone de coulée (6) disposée devant la fente de coulée (21), la zone de coulée (6) étant délimitée sur au moins un côté par la lingotière tournante (2, 22, 23, 25, 26) et la zone de coulée (6) étant conçue de telle sorte qu'un bain de masse fondue d'aluminium ou d'alliage d'aluminium (52) est formé dans la zone de coulée (6), à partir duquel masse fondue d'aluminium ou d'alliage d'aluminium (5) s'écoule ou est tirée dans la fente de coulée (21), le four de coulée (3) étant relié à la zone de coulée (6) par un système de tuyaux (41, 42, 43), le système de coulée en bande (1) comprenant des moyens (46) pour alimenter la masse fondue d'aluminium ou d'alliage d'aluminium (5) dans la zone de coulée (6), qui peuvent alimenter la masse fondue d'aluminium ou d'alliage d'aluminium (5) à la zone de coulée (6) en dessous de la surface du bain de masse fondue d'aluminium ou d'alliage d'aluminium (52) formé dans la zone de coulée (6).
  2. Système de coulée en bande (1) selon la revendication 1
    caractérisé en ce que
    l'au moins un moyen actif (4) pour le transport de masse fondue de métal (5) comprend un moyen (4) pour la mise sous pression et/ou un moyen (4) pour le pompage de la masse fondue de métal.
  3. Système de coulée en bande (1) selon la revendication 1 ou 2
    caractérisé en ce que
    l'au moins un moyen actif (4) pour le transport de masse fondue d'aluminium ou d'alliage d'aluminium (5) comprend un four à pression (4), en particulier un four à basse pression (4).
  4. Système de coulée en bande (1) selon l'une quelconque des revendications 1 à 3
    caractérisé en ce que
    le four de coulée (3) est conçu comme un four à basse pression (4).
  5. Système de coulée en bande (1) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que
    le système de coulée en bande (1) est un système de coulée en bande verticale (1).
  6. Système de coulée en bande (1) selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    le système de coulée en bande (1) présente des moyens pour la régulation du débit volumique de la masse fondue d'aluminium ou d'alliage d'aluminium vers la fente de coulée (21) et/ou de la hauteur du niveau de la masse fondue dans la fente de coulée (21).
  7. Système de coulée en bande (1) selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    la zone de coulée (6) comprend au moins une digue latérale (62), l'au moins une digue latérale (62) comprenant au moins une ouverture d'alimentation (46) pour masse fondue d'aluminium ou d'alliage d'aluminium (5).
  8. Système de coulée en bande (1) selon l'une quelconque des revendications 1 à 7, caractérisé en ce que
    la zone de coulée (6) présente au moins deux, de préférence trois, ouvertures d'alimentation (46) pour masse fondue d'aluminium ou d'alliage d'aluminium (5).
  9. Procédé pour alimenter une masse fondue d'aluminium ou d'alliage d'aluminium (5) à la fente de coulée (21) dans un système de coulée en bande (1) pour l'aluminium et/ou les alliages d'aluminium comprenant au moins un four de coulée (3) et au moins une lingotière tournante (2, 22, 23, 25, 26) conçue comme une paire de rouleaux (22, 23), de cylindres, de chenilles ou de bandes (25, 26) avec une fente de coulée (21), en particulier réalisée avec un système de coulée en bande (1) selon l'une quelconque des revendications 1 à 8,
    dans lequel la masse fondue d'aluminium ou d'alliage d'aluminium (5) est transportée activement dans une zone de coulée (6) disposée devant la fente de coulée (21), la zone de coulée (6) étant délimitée sur au moins un côté par la lingotière tournante (2, 22, 23, 25, 26) et la zone de coulée (6) étant conçue de telle sorte qu'un bain de masse fondue d'aluminium ou d'alliage d'aluminium (52) est formé dans la zone de coulée (6), à partir duquel masse fondue d'aluminium ou d'alliage d'aluminium (5) s'écoule ou est tirée dans la fente de coulée (21), la masse fondue d'aluminium ou d'alliage d'aluminium (5) étant alimentée activement à la zone de coulée (6) en dessous de la surface du bain de masse fondue d'aluminium ou d'alliage d'aluminium (52) formé dans la zone de coulée (6).
  10. Procédé selon la revendication 9,
    caractérisé en ce que
    l'au moins un four de coulée (3) est mis sous pression pour le transport de la masse fondue d'aluminium ou d'alliage d'aluminium (5).
  11. Procédé selon la revendication 9 ou 10,
    caractérisé en ce que
    la masse fondue d'aluminium ou d'alliage d'aluminium (5) est transportée au moins par étapes dans le sens contraire à la direction de la gravité (G).
EP20734983.8A 2019-07-03 2020-07-02 Alimentation de matière en fusion pour installations de coulée à bande Active EP3993921B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19184161 2019-07-03
PCT/EP2020/068713 WO2021001495A1 (fr) 2019-07-03 2020-07-02 Acheminement de matière fondue pour installations de coulée en bande

Publications (3)

Publication Number Publication Date
EP3993921A1 EP3993921A1 (fr) 2022-05-11
EP3993921C0 EP3993921C0 (fr) 2024-04-10
EP3993921B1 true EP3993921B1 (fr) 2024-04-10

Family

ID=67145718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20734983.8A Active EP3993921B1 (fr) 2019-07-03 2020-07-02 Alimentation de matière en fusion pour installations de coulée à bande

Country Status (5)

Country Link
US (1) US11673184B2 (fr)
EP (1) EP3993921B1 (fr)
JP (1) JP7265654B2 (fr)
CN (1) CN114269492B (fr)
WO (1) WO2021001495A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021001495A1 (fr) * 2019-07-03 2021-01-07 Hydro Aluminium Rolled Products Gmbh Acheminement de matière fondue pour installations de coulée en bande
CN115106494B (zh) * 2022-05-27 2023-08-18 燕山大学 一种螺旋槽管的柔性成型装置及方法

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4913775Y1 (fr) * 1971-11-24 1974-04-05
JPS5516709A (en) * 1978-07-20 1980-02-05 Furukawa Electric Co Ltd:The Continuous casting and rolling apparatus
JPS561251A (en) * 1979-06-19 1981-01-08 Furukawa Electric Co Ltd:The Continuous casting method
US4449568A (en) 1980-02-28 1984-05-22 Allied Corporation Continuous casting controller
JPS5877746A (ja) 1981-11-04 1983-05-11 Hitachi Ltd 薄板製造装置の溶融金属噴出ノズル
FR2655579A1 (fr) 1989-12-11 1991-06-14 Siderurgie Fse Inst Rech Dispositif de coulee continue de metal liquide a deux cylindres paralleles a alimentation laterale.
JPH041031U (fr) 1990-04-20 1992-01-07
JPH0560645U (ja) * 1992-01-16 1993-08-10 日立造船株式会社 ツインロール型薄板連続鋳造設備の注湯装置
DE4234259C1 (de) * 1992-10-10 1994-03-17 Sundwiger Eisen Maschinen Bandgießmaschine, bestehend aus mindestens einem Gießrad mit vorgeordneter Gießdüse oder Zwischenbehälter
DE4306863C1 (de) 1993-03-05 1994-06-16 Wieland Werke Ag Gießvorrichtung zur kontinuierlichen Herstellung von Metallband
JP3495278B2 (ja) * 1999-01-26 2004-02-09 株式会社神戸製鋼所 ベルト式連続鋳造装置およびベルト式連続鋳造方法
US6732890B2 (en) * 2000-01-15 2004-05-11 Hazelett Strip-Casting Corporation Methods employing permanent magnets having reach-out magnetic fields for electromagnetically pumping, braking, and metering molten metals feeding into metal casting machines
KR100584751B1 (ko) * 2001-12-22 2006-05-30 주식회사 포스코 쌍롤식 박판주조기의 주조롤표면 가스층두께 조절장치
AT412195B (de) 2002-06-25 2004-11-25 Voest Alpine Ind Anlagen Verfahren zur erzeugung eines metallbandes mit einer zweiwalzengiesseinrichtung
AU2002951075A0 (en) * 2002-08-29 2002-09-12 Commonwealth Scientific And Industrial Research Organisation Twin roll casting of magnesium and magnesium alloys
DE10349400B3 (de) * 2003-10-21 2005-06-16 Thyssenkrupp Nirosta Gmbh Verfahren zum Herstellen von gegossenem Stahlband
KR100985310B1 (ko) * 2004-06-30 2010-10-04 스미토모덴키고교가부시키가이샤 마그네슘 합금재의 제조방법
CN100368120C (zh) * 2005-12-02 2008-02-13 重庆大学 双辊连铸镁合金薄带浇铸装置
JP2008161875A (ja) * 2006-12-27 2008-07-17 Mitsubishi Alum Co Ltd 表面性状に優れる鋳造材を得るのに最適な鋳造用ノズル、およびそれを用いた鋳造材の製造方法とマグネシウム合金
JP2008161894A (ja) * 2006-12-27 2008-07-17 Mitsubishi Alum Co Ltd 連続鋳造圧延装置および連続鋳造圧延方法
CN101269406B (zh) * 2008-05-26 2010-06-02 重庆大学 铝合金薄带坯的连铸工艺
DE102009038974B3 (de) * 2009-08-21 2010-11-25 Salzgitter Flachstahl Gmbh Verfahren zum Erzeugen von Warmband mittels Bandgießen mit über den Bandquerschnitt einstellbaren Werkstoffeigenschaften
WO2016129344A1 (fr) * 2015-02-13 2016-08-18 株式会社Ihi Dispositif de coulée en continue
JP6524689B2 (ja) * 2015-02-13 2019-06-05 株式会社Ihi 連続鋳造装置
JP6511968B2 (ja) * 2015-06-03 2019-05-15 日産自動車株式会社 双ロール式縦型鋳造装置及び双ロール式縦型鋳造方法
WO2021001495A1 (fr) * 2019-07-03 2021-01-07 Hydro Aluminium Rolled Products Gmbh Acheminement de matière fondue pour installations de coulée en bande

Also Published As

Publication number Publication date
EP3993921C0 (fr) 2024-04-10
JP2022530716A (ja) 2022-06-30
US11673184B2 (en) 2023-06-13
WO2021001495A1 (fr) 2021-01-07
CN114269492A (zh) 2022-04-01
CN114269492B (zh) 2023-05-09
EP3993921A1 (fr) 2022-05-11
JP7265654B2 (ja) 2023-04-26
US20220118507A1 (en) 2022-04-21

Similar Documents

Publication Publication Date Title
DE69602633T2 (de) Giessen eines Stahlbandes
DE69700737T2 (de) Kontaktlose wärmeabsorber für das bandgiessen
EP0035675B2 (fr) Procédé et dispositif pour la coulée continue horizontale des métaux liquides, notamment l'acier
DE69604825T2 (de) Verfahren und vorrichtung zur herstellung von verformbarem stahl
DE69528954T2 (de) Stranggiessanlage für stahl
EP3993921B1 (fr) Alimentation de matière en fusion pour installations de coulée à bande
DE19637402C2 (de) Bandgießen
EP1181997A1 (fr) Procédé et dispositif pour la coulée continue de bande d'acier à partir d'une masse d'acier en fusion
DE2414514A1 (de) Stranggiessverfahren
DE2043882A1 (en) Flat cast object formed with a spray of - atomised metal
DE3440236C2 (fr)
DE60000858T2 (de) Verfahren und vorrichtung zum stranggiessen mit hoher geschwindigkeit
EP3016762B1 (fr) Installation de laminage de coulée continue et procédé de fabrication de produit laminé métallique
DE69323922T2 (de) Verfahren und Vorrichtung zum kontinuierlichen Giessen eines metallischen Bandes
DE2548939C2 (de) Verfahren und Vorrichtung zum Stranggießen von Bändern
EP2025432A1 (fr) Procédé destiné à la production de produits allongés en acier par coulage en continu et laminage
AT522265B1 (de) Umbau einer stranggiessanlage für knüppel- oder vorblockstränge
EP1132161B1 (fr) Procédé pour la coulée continue de brames, en particulier de brames minces
DE2853868C2 (de) Verfahren zum Stranggießen von Stahl sowie dementsprechend hergestellter Stahlstrang
DE3440235C2 (de) Verfahren und Vorrichtung zum Bandstranggießen von Metallen, insbesondere von Stahl
DE60316568T3 (de) Bandtemperaturregelvorrichtung in einer kontinuierlichen bandgiessanlage
DE3856161T2 (de) Verfahren und vorrichtung zum direkten giessen von metall zur bildung langer körper
DE60113231T2 (de) Vorrichtung und verfahren für kontinuierliches oder halbkontinuierliches giessen von aluminium
DE3406730A1 (de) Verfahren und vorrichtung zum stranggiessen von metallen, insbesondere von stahl
EP3486001B1 (fr) Installation de coulée de brames minces pourvue de tête de machine interchangeable

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20211222

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230526

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

INTC Intention to grant announced (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20231121

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502020007639

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

U01 Request for unitary effect filed

Effective date: 20240507

U07 Unitary effect registered

Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI

Effective date: 20240516

U20 Renewal fee paid [unitary effect]

Year of fee payment: 5

Effective date: 20240723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240810

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240410

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240711

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20240723

Year of fee payment: 5