EP3993921A1 - Acheminement de matière fondue pour installations de coulée en bande - Google Patents

Acheminement de matière fondue pour installations de coulée en bande

Info

Publication number
EP3993921A1
EP3993921A1 EP20734983.8A EP20734983A EP3993921A1 EP 3993921 A1 EP3993921 A1 EP 3993921A1 EP 20734983 A EP20734983 A EP 20734983A EP 3993921 A1 EP3993921 A1 EP 3993921A1
Authority
EP
European Patent Office
Prior art keywords
casting
molten metal
strip
gap
area
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.)
Granted
Application number
EP20734983.8A
Other languages
German (de)
English (en)
Other versions
EP3993921B1 (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 EP3993921B1 publication Critical patent/EP3993921B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B22D11/06—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
    • B22D11/10—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
    • 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 system comprising at least one casting furnace and at least one co-rotating mold with a casting gap, in particular a pair of rollers, cylinders, caterpillars or belts.
  • the invention also relates to a method for supplying molten metal to the casting gap in a strip casting system.
  • Strip casting using strip casting systems is an economical and energy-efficient alternative to the conventional production of metal strips using bar casting, reheating and hot rolling.
  • a hot strip is used in strip casting
  • Metal melt poured in a strip casting system in which the casting area or solidification area, in which the cast strip is formed, is limited on at least one longitudinal side by a barrier that is continuously moved and cooled during the casting process. This barrier runs with the solidifying strip, so that a so-called follow-up mold is provided.
  • Traveling molds allow a high rate of casting and solidification.
  • industrial production there are a large number of designs of such moving molds, for example casting wheel processes or single-roller processes. Due to the required widths of metal strips and others
  • casting rolling by means of a two-roll process in a horizontal or tilted direction has established itself in particular in the aluminum industry, while the vertical process is also used in the steel industry.
  • the molten metal is in particular converted into an internally cooled one
  • the roller or roller pair is introduced and initially solidifies in the casting gap between the two rollers or rollers, is then reshaped, pulled off as a tape and, for example, wound up.
  • the mostly horizontally operated two-chain process (Twin Belt Casting or Hazelett process) has established itself, in which the mold running along with it is cooled by two opposite sides
  • the solidification zone of the concurrent mold is therefore very important.
  • the molten metal which is usually fed via an open channel system from a casting furnace at a higher level, is therefore calmed down in an open tundish (intermediate vessel) before the casting gap.
  • the molten metal is first caught in the tundish and then removed from the tundish by means of gravity
  • Melt pools in the casting area in front of the mold can be regulated, for example by a plug provided in the bottom of the tundish.
  • Such a strip casting system for performing a vertical two-roller process is known, for example, from WO 2004-000487.
  • For a horizontal Such a strip casting plant with a tundish is described in EP 0 433 204 A1, for example.
  • Oxidation In particular, molten aluminum oxidizes very quickly on the surface when it comes into contact with oxygen, especially at the high temperatures caused by the process, and forms a relatively stable oxide layer. In the conventional process, the molten metal can therefore form such an oxide layer in the tundish. Due to the unsteady guidance caused by the process, it can break open repeatedly, so that oxides or other impurities that settle on the oxide layer are mixed under the molten metal by turbulence. This results in the
  • the present invention has therefore set itself the task of providing a strip casting system which, on the one hand, enables improved regulation of the volume flow of the molten metal to the casting gap, improved productivity and improved strip quality and, at the same time, allows an increase in safety. In addition, a corresponding procedure is to be proposed.
  • Strip casting system achieved in that the strip casting system 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, in contrast to passive means, e.g. passive means exclusively using gravity, which is designed to use energy to transport the molten metal so that the transport of the molten metal over the active agent becomes controllable.
  • the active means for transporting molten metal can transfer energy to the molten metal, for example mechanically, electrically or electromagnetically.
  • the drive work of the pump can be converted into kinetic energy by means of a pump
  • Molten metal can be converted or energy is 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, to move the molten metal at least partially against the direction of gravity.
  • a tundish can be provided, but a tundish that is generally used in the conventional melt feed can be preferred
  • Calming of the molten metal is provided to be dispensed with.
  • productivity of the strip casting system according to the invention can be compared to a
  • the strip casting system according to the invention thus allows the near-net-shape production of a high-quality metal strip, in particular one
  • Melted metal can also improve the safety in the operation of the strip casting plant.
  • the moving mold of the strip casting system can be, for example, a moving mold of one of the conventional methods described above.
  • the mold running along with it can thus be a pair of rollers, rollers, caterpillars or chains.
  • a pair of rolls of a vertical twin raw caster arranged axially parallel to each other a pair of rolls of a horizontal or tilted twin roll caster arranged one above the other, two superimposed casting chains (e.g. Hazelett) or caterpillar molds, which are held by a machine frame or are arranged in a housing.
  • the co-rotating mold has a casting gap.
  • the casting gap can be up to 2.5 m wide, for example, so that particularly wide metal strips with a width of over 1.6 m can also be produced, which is possible
  • Belt width can therefore be close to the width of the roll, i.e. also approximately 2.5 m be.
  • the casting gap can for example be 1 to 6 mm high, so that
  • Metal strips can be produced with an appropriate strength.
  • the molten metal in contact with the co-rotating mold is cooled at a cooling rate of in particular at least 20 K / s, preferably 50 K / s.
  • a cooling rate of at least 100 K / s and / or up to 8000 K / s can be set. Due to the high solidification speed
  • the belt speeds at which the cast metal strip emerges from the casting gap can be set in the range from 0.06 to 3.0 m / s.
  • the metal strip can then be wound up in a coil, for example, and fed to subsequent cold rolling on a cold rolling stand, or it can also be hot and / or cold rolled directly in-line without any intermediate winding. Furthermore, the metal strip can be artificially aged between strip casting and cold rolling.
  • the casting furnace can be designed as a container for the intermediate storage of molten metal or the casting furnace can be designed as a melting furnace for melting a metal melt.
  • the casting furnace can be heated and / or regulated.
  • the at least one active means for transporting molten metal comprises a means for applying pressure and / or a means for pumping the molten metal.
  • a means for applying pressure is understood to mean a means which is designed to apply pressure to the molten metal in order to To transport molten metal from the casting furnace to the casting gap.
  • a means which is designed to apply pressure to the molten metal in order to To transport molten metal from the casting furnace to the casting gap.
  • the surface of a melt pool in a storage facility for metal melt for example, the surface of a melt pool in a storage facility for metal melt
  • a means for applying pressure can therefore comprise, for example, a pressure chamber.
  • a pressure chamber is in particular a preheated or heatable closed, i.e. pressure-tight chamber in the molten metal
  • the pressure chamber can be provided by a low-pressure furnace in which the molten metal is heated and, for example, in a
  • a means for pumping the molten metal can be provided.
  • a means for pumping the molten metal can be used for this purpose
  • a metal pump can do the
  • An electromagnetic metal pump is preferably used in order to transport the molten metal as calmly and evenly as possible.
  • 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. Will the chamber with When subjected to low pressure, it is a low pressure furnace. The use of low pressure enables safe and quiet guidance and control of the
  • a low-pressure furnace is designed, for example, to enable pressurization of 0.1 to 1.0 bar. Preferred one
  • Low-pressure die casting used low-pressure furnaces or correspondingly scaled versions thereof can be used.
  • the pressure or low pressure furnace also has a riser pipe, a particularly safe strip casting system is provided because the metal melt if the
  • Pressurization can in particular automatically sink back into the pressure chamber through the riser pipe.
  • the casting furnace can be separated from the active means for transporting
  • strip casting system arises if, according to a next embodiment of the strip casting system, the casting furnace is designed as a low-pressure furnace. Further active means for transporting the molten metal can then, for example, be dispensed with.
  • the simpler embodiment also enables a simplified and thus improved regulation 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 systems in which a casting area or casting gusset is arranged above the casting gap.
  • Strip casting system can be avoided with the management of the molten metal suggested above.
  • the strip casting system has means for regulating the volume flow of the metal melt to the casting gap and / or the height of the melt level in the casting gap.
  • Transport of the molten metal can be used advantageously to enable precise and rapid regulation of the volume flow of the molten metal to the casting gap. If the molten metal is for example by a
  • a control circuit can have a computer which is set up to regulate the pressure for optimal operation, for example in accordance with a known or determined correlation of pressure and required volume flow for a strip casting speed to be achieved.
  • Pressure chamber or a low pressure furnace can be provided. It is also possible to regulate the volume flow by measuring the fill level of the molten metal, for example in the casting area or casting gusset. For example, 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. With such a combined measurement, a faster closed loop can be established.
  • 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. In particular, existing pressure sensors can also be used, for example in low-pressure ovens.
  • the fill level or level of molten metal can, for example, with
  • the water level is preferably determined by means of laser measurement, for example the casting area can have at least one laser distance sensor.
  • the strip casting system has a casting area arranged in front of the casting gap.
  • the casting area is arranged in front of the moving mold and is usually limited by the moving mold.
  • the casting area is, for example, a
  • the casting area can be designed as a casting gusset, the casting area or the casting gusset being formed by the accompanying mold and at least one side dam, preferably two side dams, which are attached opposite one another on both sides of the moving mold.
  • a melt pool is formed in the casting area, from which metal melt flows or is drawn into the roll gap.
  • the casting area or casting gusset is arranged essentially above the casting gap and delimited by the upper area of the co-rotating mold. With horizontal or tilted strip casting systems the casting area is arranged to the side of and in particular slightly increased relative to the casting gap.
  • the casting area or casting gusset enables a particularly uniform distribution of the metal melt over the entire width of the mold and the continuous supply of the metal melt to the casting gap via the im
  • a distributor nozzle can also be provided, via which the molten metal can be fed to the casting gap and distributed over the entire width of the casting gap.
  • the distributor nozzle is closed, for example, until shortly before the casting gap, so that the
  • the casting area is formed, for example, essentially by the 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 connected by a pipe system.
  • the casting furnace is connected to the casting gusset and / or the distributor nozzle by a pipe system.
  • Pipe system can be achieved that there is no unregulated oxidation of the surface of the metal melt when the metal melt is guided to the casting area.
  • the pipe system also enables the molten metal to be guided particularly smoothly and controllably from the casting furnace to the casting area. If the pipe system is also an essentially airtight and / or gas-tight pipe system, unregulated oxidation of the metal melt can be avoided even better.
  • molten metal In terms of safety, they can also be guided at least partially against gravity.
  • the strip casting installation 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 metal melt can thus be avoided. Even more preferably, the pipe system has only heatable pipes, in particular heatable ceramic pipes.
  • Strip casting system 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 such that the molten metal can be fed to the casting area below the surface of a melt pool, the surface of the melt pool can be kept even quieter. Breaking through the surface of the melt pool is avoided.
  • an unregulated formation of oxides can be avoided in this way.
  • the unregulated intermixing of oxides can also be effectively avoided, because turbulence on the surface or movement of the surface can be avoided. In this way it can be avoided that an oxide layer that has formed is drawn in and mixed in in an uncontrolled manner.
  • the casting area has at least one side dam, the at least one side dam
  • the casting area is a casting gusset.
  • the at least one feed opening is also advantageously arranged in such a way that it is in the running Operation of the strip casting line below the surface of the casting pinch
  • the casting area has at least two, preferably three, feed openings for a metal melt.
  • the at least two, preferably three feed openings can preferably be arranged in the bottom of the casting area, so that the molten metal can be fed to the casting area from below, essentially counter to the direction of gravity. More preferably, the at least two feed openings are arranged in the width direction essentially at opposite ends of the casting area.
  • a third supply opening is arranged, for example, centrally between two other supply openings.
  • the casting area can also be exposed to inert gas in order to avoid the formation of oxides on the surface of the melt pool.
  • the molten metal is actively transported according to the invention, for example by overpressure against the force of gravity, the volume flow of the molten metal can be regulated very precisely.
  • the molten metal can be fed to a controlled continuous solidification process.
  • the metal melt can in particular be guided very calmly 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 metal melt can be fed to the melt pool, for example, 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 system according to the invention.
  • the at least one casting furnace for transporting the molten metal is subjected to pressure.
  • pressure can be applied to the surface of a melt pool in the casting furnace.
  • the casting furnace is preferably a low-pressure furnace in which the molten metal is heated and, for example, pressed into a riser pipe by applying pressure.
  • This configuration enables particularly calm and gentle melt flow and simple regulation of the volume flow of the metal melt, 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 regulatable volume flow of the molten metal.
  • 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 does not continue to run
  • a melt pool is or is formed in front of the casting gap and the metal melt is transferred from the casting furnace to the
  • the melt pool is essentially guided with the exclusion of air and / or gas, so an unregulated oxidation of the metal melt can be avoided even better.
  • the strip casting system has a casting gusset and / or a distributor nozzle arranged in front of the casting gap and the casting furnace is connected to the
  • G cordzwickel and / or the distributor nozzle connected by a pipe system wherein the pipe system is or is substantially completely filled with molten metal. Essentially fully here refers to the inevitable
  • Impurities may be present.
  • the metal melt is fed into the melt pool below the surface of the melt pool.
  • a melt pool is or is formed in front of the casting gap and the metal melt is fed to this melt pool below the surface of the melt pool.
  • the metal melt can advantageously be fed to the melt pool from the side and / or from below.
  • the metal melt is preferably fed continuously to the melt pool or the casting gap, i.e. in particular without a
  • FIG. 1 shows a schematic sectional view of an embodiment of a vertical strip casting system according to the invention
  • Fig. 2 is a perspective view of the casting area of the invention
  • FIG. 3 shows a schematic sectional view of a further exemplary embodiment of a horizontal strip casting system not according to the invention
  • FIG. 4 shows a schematic sectional view of a further exemplary embodiment of a horizontal strip casting system according to the invention.
  • FIG. 5 shows a schematic representation of a further exemplary embodiment of a horizontal strip casting plant according to the invention.
  • Fig. 1 shows a strip casting system 1 comprising a moving mold 2 with a casting gap 21, the moving mold 2 is formed by two rollers 22, 23, and a casting furnace 3, the belt casting system 1 having an active means 4 for transporting molten metal 5 from Having casting furnace 3 to casting gap 21.
  • the strip casting system 1 is a vertical strip casting system 1.
  • the active means 4 for transporting molten metal 5 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 an active means 4, in particular as a low-pressure furnace 4.
  • the exemplary strip casting system 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, one side dam 62 having a feed opening 46 for the molten metal 5.
  • the feed opening 46 is here as a means 46 for
  • Feeding of the metal melt 5 into the casting gusset 6 is provided, via which the metal melt 5 is transferred to the casting area 6 below the surface of the casting area formed melt pools 52 can be supplied.
  • Strip casting installation 1 thus comprises means 46 for feeding the molten metal 5 into the casting area 6, which means 46 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 metal melt 5 is here, for example, an aluminum melt 5.
  • the surface of the melt pool 53 in the low-pressure furnace 3, 4 is subjected to pressure, for example 0.1 to 1.0 bar, preferably 0.5 and 0.6 bar, via an air or gas supply 32, the metal melt 5 can be fed via the Riser pipe 43 and the heated pipe 41 are transported to the casting area 6 against the direction of gravity G. This enables a particularly calm and gentle
  • the example strip casting system 1 has means for regulating the volume flow of the molten metal 5 into the pouring gap 21 and / or the height of the melt level in the pouring 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 a pressure sensor 31, which measures the pressure in the low-pressure furnace 3, 4. If, for example, a lowering of the fill level of the melt pool 52 is determined by means of the fill level sensor 61, the pressure in the low-pressure furnace 3, 4 can for example be increased in a controlled manner in order to bring the fill level back to an optimal fill level.
  • FIG. 2 shows a perspective view of the casting area 6 of the exemplary vertical strip casting system 1 from FIG. 1.
  • the mold 2 moving along with 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 mold 2 and two side dams 62.
  • a side dam 62 has a feed opening 46 via 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 immersion tube is made from a tundish lying above the melt, there is no need for the tundish, which in turn leads to oxide formation and the
  • Fig. 3 shows a strip casting plant 1 not according to the invention comprising a follower mold 2 with a casting gap 21, the follower mold 2 being formed by two (insulating block) chains 25, 26, and a casting furnace 3, the tape casting machine 1 being an active agent 4 for transporting molten metal 5 from the casting furnace 3 to the casting gap 21.
  • the strip casting system 1 is here a horizontal or tilted strip casting system 1.
  • molten metal 5 comprises a means 4 for pumping the
  • Molten metal 5 in the form of an electromagnetic metal pump 4 so that the molten metal 5 can be transported from the pouring furnace 3 into the distributor nozzle 63 from below.
  • the pouring area 6 is formed here, for example, by the closed distributor nozzle 63.
  • Fig. 4 shows a further strip casting system 1 according to the invention comprising a casting furnace 3 and an accompanying mold 2 with a casting gap 21, the accompanying mold 2 being formed by two rollers 22, 23, the
  • Strip casting system 1 has an active means 4 for transporting molten metal 5 from the casting furnace 3 to the casting gap 21.
  • the strip casting system 1 is a horizontal one here or tilted strip casting system 1.
  • the molten metal 5 is actively transported from below through the feed opening 46 into the casting area 6 by the metal pump 4.
  • a melt pool 52 is formed here in the casting area 6. .
  • FIG. 5 shows an example of a strip casting system, the casting area 6 having at least three feed openings 46 for molten metal.
  • Two feed openings 46 are arranged essentially at opposite ends of the casting area 6 in the width direction.
  • a third supply opening 46 is arranged centrally between the two other supply openings 46.
  • the molten metal 5 is actively transported from the casting furnace 3 via the metal pump 4 from below through the supply opening 46 into the casting area 6.
  • the supply from the furnace via the pipe 41 can be branched into several strands and fed through several perpendicular pipes via several supply 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 distribution system at several points at the same time and at the same temperature and speed, thus ensuring that a homogeneous isothermal melt flows over the entire width of the outlet into the casting gap 21.
  • the described exemplary embodiments of the strip casting system 1 each enable the uniform supply of aluminum melt 5 into casting areas 6 or to casting gaps 21, so that the casting and rolling processes can be stabilized, productivity improved and material defects avoided.
  • This can be achieved, for example, by feeding the metal melt 5 below the surface of a melt pool 52 to the casting roll gap 21, so that the surface of the existing melt pool 52 is not broken through or disturbed by bath movement. This avoids oxygen contact of the incoming metal melt 5 and thus reduces the total amount of oxides formed.
  • the strip casting plant 1 can thus be run at the optimum speed without the risk of local melt breakouts.
  • the tape quality can be kept consistent across the entire width. A non-uniform solidification across the width of the casting gap and, as a result, for example, local breakthroughs of melt through the casting gap, can thus be avoided. In this way, surface defects, cracks in the strip or broken castings can also be avoided.
  • melt introduced from below or from the side can be inserted into
  • Single strands are distributed over 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.
  • uniformity of the product properties over the bandwidth can be improved and the productivity of the plant can be increased further, since the risk of local melt breakouts is reduced.
  • the exemplary embodiments described can also be advantageous for reasons of occupational safety. If problems arise in the molten area of the plant, the transport system can be switched off and the
  • Residual melt in the system immediately falls back into the furnace with the force of gravity G through the riser pipe 42. There is no further flow of the melt into the casting area.

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

Abstract

L'invention concerne une installation de coulée en bande (1) conçue pour de l'aluminium et/ou des alliages d'aluminium, comprenant au moins un four de coulée (3) et au moins une lingotière (2, 22, 23) rotative comportant un interstice de coulée (21), la ou les lingotière(s) (2, 22, 23) rotative(s) se présentant sous la forme d'une paire de rouleaux (22, 23), cylindres, chenilles ou bandes. L'installation de coulée en bande (1) comporte au moins un moyen actif (4) pour transporter un métal fondu (5) du four de coulée (3) jusqu'à l'interstice de coulée (21). L'installation de coulée en bande (1) comporte une zone de coulée (6) agencée avant l'interstice de coulée (21), cette zone de coulée (6) étant délimitée au niveau d'au moins un côté par la lingotière (2, 22, 23) rotative, et cette zone de coulée (6) est conçue de manière que ladite zone de coulée (6) comporte un bain de fusion (52) à partir duquel le métal fondu (5) s'écoule ou est prélevé vers l'interstice de coulée (21). Le four de coulée (3) est relié à la zone de coulée (6) par l'intermédiaire d'un système de tuyau (41, 43). L'installation de coulée en bande (1) comporte des moyens (46) pour acheminer le métal fondu (5) dans la zone de coulé (6), ces moyens pouvant introduire le métal fondu (5) dans la zone de coulée (6) sous la surface du bain de fusion (52) formé dans la zone de coulée (6).
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 (2)

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EP3993921A1 true EP3993921A1 (fr) 2022-05-11
EP3993921B1 EP3993921B1 (fr) 2024-04-10

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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
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EP3993921B1 (fr) * 2019-07-03 2024-04-10 Speira GmbH Alimentation de matière en fusion pour installations de coulée à 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

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US11673184B2 (en) 2023-06-13
EP3993921B1 (fr) 2024-04-10
JP7265654B2 (ja) 2023-04-26
CN114269492A (zh) 2022-04-01
WO2021001495A1 (fr) 2021-01-07
US20220118507A1 (en) 2022-04-21
CN114269492B (zh) 2023-05-09
JP2022530716A (ja) 2022-06-30

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