EP4192640A1 - Busette de coulée ou répartiteur de coulée, ensemble et procédé pour le chauffage et/ou le préchauffage d'une busette de coulée - Google Patents

Busette de coulée ou répartiteur de coulée, ensemble et procédé pour le chauffage et/ou le préchauffage d'une busette de coulée

Info

Publication number
EP4192640A1
EP4192640A1 EP21763254.6A EP21763254A EP4192640A1 EP 4192640 A1 EP4192640 A1 EP 4192640A1 EP 21763254 A EP21763254 A EP 21763254A EP 4192640 A1 EP4192640 A1 EP 4192640A1
Authority
EP
European Patent Office
Prior art keywords
pouring
casting
distributor
nozzle
heating
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.)
Pending
Application number
EP21763254.6A
Other languages
German (de)
English (en)
Inventor
Cihangir Demirci
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4192640A1 publication Critical patent/EP4192640A1/fr
Pending legal-status Critical Current

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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/106—Shielding the molten jet
    • 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
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • 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
    • B22D11/11—Treating the molten metal
    • B22D11/113—Treating the molten metal by vacuum treating
    • 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
    • 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
    • B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • 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
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • 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
    • B22D41/12—Travelling ladles or similar containers; Cars for ladles
    • 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
    • B22D41/14—Closures
    • 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
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • 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
    • B22D41/50—Pouring-nozzles
    • B22D41/502—Connection arrangements; Sealing means therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a pouring nozzle or pouring distributor for transferring molten metal into a metallurgical aggregate or vessel.
  • the invention further relates to an arrangement for heating and/or preheating such a pouring nozzle or such a pouring distributor and a method for heating and/or preheating a pouring nozzle or a pouring distributor.
  • DE 197 386 82 B4 discloses a melting vessel with an outlet arranged in a passage in its base, which has a funnel formed from individual fluid-cooled metal segments, which is surrounded by a coil that can be charged with alternating current for inductive heating and in which the metal segments at their form a common metal ring on the upper side.
  • the well-known melting container is made of ceramic.
  • a ceramic insert is arranged in the passage of the melting container, which consists of a ceramic ring seated directly in the passage and a permanent ceramic insert lying against this ceramic ring, the metal segments being held detachably in the permanent insert with their metal ring. Heating of the spout is effected with an induction coil which extends around the metal segments of the pouring nozzle.
  • Controlled heating of a casting nozzle is relatively difficult with the means known in the prior art, in particular under vacuum and/or a protective gas atmosphere at different pressures.
  • Uniform and controlled heating is particularly important when pouring nozzles, cones, dip tubes or pouring distributors are made of a ceramic refractory material in order to prevent cracking in the material.
  • the invention is therefore based on the object of providing a pouring nozzle or a pouring distributor of the type mentioned at the outset, which avoids the disadvantages of the prior art.
  • the invention is also based on the object of providing an arrangement for heating and/or preheating a pouring nozzle or a pouring distributor and a method for heating and/or preheating a pouring distributor which do not have the aforementioned disadvantages.
  • the object is achieved by the features of claim 1 relating to a pouring nozzle or a pouring distributor, the features of claim 5 relating to an arrangement for heating and/or preheating a pouring nozzle or a pouring distributor, by a method having the features of claim 8 and by a system with the features of claim 10.
  • One aspect of the invention relates to a pouring nozzle or spreader for transferring molten metal into a metallurgical unit or vessel, which consists at least partially of a refractory material and is characterized in particular by the fact that it has at least one resistance heating element embedded in the refractory material.
  • pouring nozzle within the meaning of the present invention includes both conical or funnel-shaped as well as tubular or cylindrical parts that are designed to deliver molten metal. This includes so-called cone bricks as well as dip tubes or outlets on distributor channels or even entire pouring distributors.
  • the casting nozzle or the casting distributor consists of a ceramic material in which at least one resistance heating element can be embedded. Due to the preferably complete embedding of the resistance heating element in the material, a particularly uniform heat distribution and heating of the pouring nozzle or the pouring distributor can be achieved.
  • At least one resistance heating element can be designed as a heating conductor made of metal or graphite.
  • a further aspect of the invention relates to an arrangement for heating and/or preheating a casting nozzle or a casting distributor of the type described above under a vacuum and/or under an inert gas atmosphere, comprising at least one voltage source and a current conductor which are connected to the current connections of the casting nozzle or the casting distributor.
  • the arrangement is characterized in particular by at least one regulating and control device for regulating the heating output of the at least one resistance element.
  • a large number of voltage sources or a voltage source with a number of power levels is provided for energizing a number of resistance heating elements which are designed for different heating powers.
  • a method for heating and/or preheating a casting nozzle or a casting distributor is proposed with at least one resistance heating element embedded in a refractory material of the casting nozzle or the casting distributor, which is characterized by continuous or quasi-continuous heating of the casting nozzle or the casting distributor under vacuum and/or Inert gas atmosphere characterized by a regulated energization of at least one resistance heating element.
  • Heating and/or warming preferably takes place with different heating capacities and/or with different temperature zones.
  • Both the casting nozzle or casting distributor as well as the arrangement and the method can be used in vacuum induction melting devices or vacuum induction furnaces, the induction coils of which are arranged in a vacuum chamber or outside the vacuum chamber, in induction furnaces or induction melting furnace systems that are under atmospheric Conditions are operated in the case of forehearth storage furnaces with a plug-type casting device, which are operated under vacuum and/or under atmospheric conditions, in the case of electric arc furnaces, which are operated under atmospheric conditions with bottom tapping, in pouring and transfer ladles that are operated under vacuum or atmospheric conditions with bottom tapping, as well as troughs and tundishes that are used on continuous casting plants and/or vacuum induction melting devices or induction melting furnaces with pouring nozzles, dip tubes or the like .
  • a system for charging, melting and casting metal under vacuum and/or a protective gas atmosphere is also provided with at least one pouring nozzle and/or with at least one pouring distributor and/or arrangement of the type described above, which has at least one vacuum induction melting device, means for charging starting materials under vacuum and/or inert gas into the at least one vacuum induction melting device, and at least one vacuum induction casting device which can be connected to the at least one vacuum induction melting device, the vacuum induction casting device comprises at least one storage chamber which can be coupled gas-tight to a continuous casting plant or a powder atomization plant as a downstream unit.
  • Figure 1 is a view of a plant according to the invention
  • Figure 2 is a schematic representation of a vertical continuous casting plant as a downstream unit
  • Figure 3 is a schematic representation of a horizontal continuous casting plant as a downstream unit
  • Figure 4 is a schematic representation of a circular arc continuous casting plant as a downstream unit
  • FIG. 5 shows a schematic representation of a casting-rolling plant as a downstream unit
  • FIG. 6 shows a schematic representation of a powder atomization system as a downstream unit
  • FIG. 7 shows a schematic sectional view of the system according to FIG. 1 along the sectional plane VI-VI in FIG. 1 and
  • FIG. 8 shows a sectional view through a pouring nozzle according to the invention with an arrangement for heating.
  • the system shown in FIG. 1 comprises a vacuum induction casting device 1 and two vacuum induction melting devices 2A, 2B connected to the vacuum induction casting device 1.
  • the vacuum induction casting device 1 is coupled to a vertical continuous casting plant 3 as a downstream unit.
  • the units shown in FIGS. 3-6 can be provided.
  • the vacuum induction casting device 1 comprises a storage chamber 4 and a forehearth 5 which communicate with one another.
  • a crucible inductor 30 is arranged inside the storage chamber 4 and keeps the melt at casting temperature.
  • the arrangement comprising the storage chamber 4 and the forehearth 5 is pivoted about a horizontal axis in tilting bearings 6 (see FIG. 1) and by means of at least one piston-cylinder arrangement 7 about the horizontal axis pivoted.
  • the vacuum induction casting device 1 comprises two stopper casting devices 8 and associated casting nozzles 9, via which the molten metal can be transferred to the respective downstream unit, for example to the vertical continuous casting plant 3. Furthermore, the vacuum induction casting device 1 is arranged on a base frame 11 that can be moved on rails 10, via which the vacuum induction casting device 1 can be moved transversely to its tilting axis. The vacuum induction casting device 1 is mounted on load cells of the base 11 .
  • the storage chamber 4 of the vacuum induction casting device 1 is connected to a respective vacuum induction melting device 2A, 2B via lateral bushings 12 which extend through the tilting bearings 6 .
  • the connection between the vacuum induction melting devices 2A, 2B and the storage chamber 4 of the vacuum induction casting device 1 is closed by means of bellows seals 13.
  • the bushings 12 can also be closed by means of vacuum slides 14 .
  • the starting materials are melted in the vacuum induction melting devices 2A, 2B, which transfer the melt to the storage chamber 4 of the vacuum induction casting device 1 .
  • the vacuum induction melters 2A, 2B are essentially identical, so only one of the vacuum induction melters 2A, 2B will be described below.
  • Each of the vacuum induction melting devices 2A, 2B comprises a furnace chamber 15 which is part of an upper furnace 16 and which is sealed with a melting crucible 17 in a gas-tight manner.
  • the crucible 17 is designed in a known manner as an inductively heated melting vessel. This is moved up to the upper furnace 16 via a rail system (not shown) and from below attached to this. The crucible 17 is held in the upper furnace 16 in the illustrated example.
  • the upper furnace 16 is pivoted in tilting bearings 6 and pivoted by means of two piston-cylinder assemblies 7 about a horizontal pivot axis.
  • a charging tower 18 is flanged to the top of the upper furnace 16, which can also be connected in a gas-tight manner and serves as a lock for charging baskets 19, which bring the starting material into the crucible 17.
  • a changing chamber 20 is connected to the side of the furnace chamber 15, via which a distributor channel 21 can be introduced into the furnace chamber 15 as a casting distributor.
  • the changing chamber 20 is also designed as a lock chamber and can be shut off with respect to the oven chamber 15 via a vacuum slide 14 .
  • the reference number 22 designates bunker systems mounted on weighing cells, which can supply the starting materials or alloy additives to the crucible 17 and/or the storage chamber 4 via feed lines 23 .
  • the bunker systems 22 and/or feed lines 23 can each be closed off from the furnace chambers 15 and/or from the storage chamber 4 by means of vacuum slide valves, which are not specified in detail.
  • raw materials are first fed via charging baskets 19 to the crucibles 17 in a vacuum and/or inert gas atmosphere and are also melted therein in a vacuum and/or inert gas atmosphere, optionally with charging with other alloying components.
  • a distributor trough 21 preheated in an exchange chamber 20 is brought into the furnace chamber 15 of a vacuum induction melting device 2A in such a way that it is located below a pouring spout 24 of the crucible 17.
  • the distribution channel 21 is dimensioned such that it extends into the storage chamber 4 in the pouring position.
  • the vacuum induction melting devices 2A, 2B have with respect to the storage chamber 4 of the vacuum induction Pouring device 1 a slope of about 2 °.
  • the crucible 17 is pivoted about the tilting bearing 6 so that the melt in it can be emptied completely into the distribution channel 21 .
  • the melt passes through the passages 12, which are closed by means of a bellows seal 13, from the vacuum induction melting device 2A into the vacuum induction casting device 1.
  • the melt then also passes via a control of the stopper casting device 8 in the forehearth 5 of the vacuum induction casting device 1 under vacuum and/or inert gas in the downstream unit.
  • the treatment of the melt can be done in the other vacuum induction melter 2B, which subsequently melts the melt into a tundish for transfer to the storage chamber 4 of the vacuum induction caster 1 21 pours.
  • the liquid melt is metered through the casting nozzles 9, for example, into the continuous casting mold of the vertical continuous casting plant 3 by means of a stopper control.
  • the stopper casting device 8 comprises stopper rods 26 guided in stopper chambers 25, which form or have a closure body at their leading end and, when the casting nozzles 9 are closed, dip into them.
  • the vacuum tightness of the continuous casting molds is ensured via vacuum flanges 27, which are part of the bellows seal 13 shown in FIG.
  • the dosing of casting powder into the continuous casting mold or onto the melt under vacuum and/or inert gas is carried out by at least one vacuum-tight and inert-gas-tight dosing device 28, which is mounted on load cells and arranged on a movable carriage 29.
  • a dosing line which is protected against the atmosphere with a vacuum valve, opens into the vacuum seal of the interface between the vacuum induction casting device 1 and the downstream unit or the downstream continuous casting plant 3.
  • the pouring nozzles 9 are closed with the closure body of the stopper rod 26, then the vacuum induction casting device 1 is tilted so that the melt is shifted from the forehearth 5 into the storage chamber 4.
  • the vacuum induction casting device 1 can then be displaced on the rails 10 transversely to the tilting axis.
  • the casting nozzle 9 shown in section in FIG. 8 comprises a conical brick 31 and an immersion tube 32, which consist of a ceramic refractory material or a ceramic refractory material.
  • Resistance heating elements 33 in the form of resistance wires are embedded in the material of the cone stone 31 and of the immersion tube 32 .
  • the resistance heating elements 33 are supplied with current via a high-current power supply 34 as a voltage source.
  • the high-current supply 34 can be routed to power connections 36 of the pouring nozzle 9 via high-current cables 35 or flexible high-current bands.
  • both the cone 31 and the immersion tube 32 can comprise a large number of resistance heating elements 33 and power connections 36 for realizing different temperature zones.
  • the power is preferably supplied to the resistance heating elements 33 with the aid of a control device, not shown, in a quasi-continuous manner to a target temperature, so that the cone stone 31 and the immersion tube 32 can be warmed or heated to a specified target temperature without cracking.
  • high current means voltages of up to 10 kV, preferably at currents of more than 100 A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Details (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

L'invention concerne une busette de coulée (9) ou un répartiteur de coulée permettant le transfert de métal fondu vers une unité ou un récipient métallurgique, ladite busette ou ledit répartiteur étant au moins partiellement constitué(e) d'un matériau réfractaire comprenant au moins un élément chauffant à résistance (33) intégré dans ledit matériau réfractaire. L'invention concerne également un ensemble et un procédé pour le chauffage et/ou le préchauffage de la busette de coulée (9) ou du répartiteur de coulée.
EP21763254.6A 2020-08-06 2021-08-06 Busette de coulée ou répartiteur de coulée, ensemble et procédé pour le chauffage et/ou le préchauffage d'une busette de coulée Pending EP4192640A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020209989 2020-08-06
PCT/EP2021/072023 WO2022029298A1 (fr) 2020-08-06 2021-08-06 Busette de coulée ou répartiteur de coulée, ensemble et procédé pour le chauffage et/ou le préchauffage d'une busette de coulée

Publications (1)

Publication Number Publication Date
EP4192640A1 true EP4192640A1 (fr) 2023-06-14

Family

ID=77595506

Family Applications (4)

Application Number Title Priority Date Filing Date
EP21763254.6A Pending EP4192640A1 (fr) 2020-08-06 2021-08-06 Busette de coulée ou répartiteur de coulée, ensemble et procédé pour le chauffage et/ou le préchauffage d'une busette de coulée
EP21763258.7A Active EP4192639B1 (fr) 2020-08-06 2021-08-06 Dispositif de commande automatique de dispositif de coulée à quenouille, et système de charge, de fusion et de coulée de métal et d'alliages métalliques sous vide et/ou atmosphère de gaz protecteur
EP21763256.1A Active EP4192637B1 (fr) 2020-08-06 2021-08-06 Dispositif de coulée par induction sous vide permettant la coulée de métal et d'alliages métalliques sous vide et/ou à une atmosphère de gaz de protection, et procédé de changement d'une quenouille et/ou d'un corps de fermeture d'un dispositif de coulée de quenouille sur un dispositif de coulée par induction sous vide
EP21763257.9A Active EP4192636B1 (fr) 2020-08-06 2021-08-06 Système pour charger, faire fondre et couler des métaux et des alliages métalliques dans une atmosphère de gaz sous vide et/ou de protection et procédé de fusion et de coulée quasi continues de métal dans une atmosphère de gaz sous vide et/ou de protection

Family Applications After (3)

Application Number Title Priority Date Filing Date
EP21763258.7A Active EP4192639B1 (fr) 2020-08-06 2021-08-06 Dispositif de commande automatique de dispositif de coulée à quenouille, et système de charge, de fusion et de coulée de métal et d'alliages métalliques sous vide et/ou atmosphère de gaz protecteur
EP21763256.1A Active EP4192637B1 (fr) 2020-08-06 2021-08-06 Dispositif de coulée par induction sous vide permettant la coulée de métal et d'alliages métalliques sous vide et/ou à une atmosphère de gaz de protection, et procédé de changement d'une quenouille et/ou d'un corps de fermeture d'un dispositif de coulée de quenouille sur un dispositif de coulée par induction sous vide
EP21763257.9A Active EP4192636B1 (fr) 2020-08-06 2021-08-06 Système pour charger, faire fondre et couler des métaux et des alliages métalliques dans une atmosphère de gaz sous vide et/ou de protection et procédé de fusion et de coulée quasi continues de métal dans une atmosphère de gaz sous vide et/ou de protection

Country Status (3)

Country Link
EP (4) EP4192640A1 (fr)
ES (1) ES2982841T3 (fr)
WO (4) WO2022029302A1 (fr)

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Also Published As

Publication number Publication date
EP4192636A1 (fr) 2023-06-14
EP4192637B1 (fr) 2024-04-17
EP4192639A1 (fr) 2023-06-14
EP4192636B1 (fr) 2024-02-14
WO2022029298A1 (fr) 2022-02-10
EP4192637A1 (fr) 2023-06-14
WO2022029301A1 (fr) 2022-02-10
WO2022029302A1 (fr) 2022-02-10
WO2022029300A1 (fr) 2022-02-10
EP4192639B1 (fr) 2024-10-09
ES2982841T3 (es) 2024-10-17

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