EP1673187A1 - Procede et dispositif de coulee continue de metal - Google Patents

Procede et dispositif de coulee continue de metal

Info

Publication number
EP1673187A1
EP1673187A1 EP04764936A EP04764936A EP1673187A1 EP 1673187 A1 EP1673187 A1 EP 1673187A1 EP 04764936 A EP04764936 A EP 04764936A EP 04764936 A EP04764936 A EP 04764936A EP 1673187 A1 EP1673187 A1 EP 1673187A1
Authority
EP
European Patent Office
Prior art keywords
separation medium
mold
channel
metal
supply
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.)
Withdrawn
Application number
EP04764936A
Other languages
German (de)
English (en)
Inventor
Ralf LÜNGEN
Hermann-Josef Meyer
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.)
LOI Thermprocess GmbH
Original Assignee
LOI Thermprocess 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 LOI Thermprocess GmbH filed Critical LOI Thermprocess GmbH
Publication of EP1673187A1 publication Critical patent/EP1673187A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/049—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0401—Moulds provided with a feed head
    • 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
    • B22D11/07—Lubricating the moulds

Definitions

  • the invention relates to a method and an apparatus for continuous casting of metal, particularly of non-ferrous metal, with a mold in whose open cross-section solidifies the molten metal and which has a running surface for r comprises a metal strand with a refractory article, which is seated on the mold and the a has an open cross-section through which the molten metal is fed, a liquid and a gaseous separation medium being conducted in a channel system to the running surface.
  • a device of the type mentioned is known from EP 0566 865 A1.
  • a plate-shaped release agent distributor which is clamped between the refractory attachment and the surface of the mold, has supply channels for a liquid and a gaseous release agent or release medium on the top and bottom.
  • the liquid separating medium usually oil and the gaseous separating medium are fed separately to the mold tread via one side of the separating agent distributor.
  • the liquid and the gaseous separation medium are only mixed when the separation medium emerges from the tread of the mold.
  • the manufacture of the release agent distributor is very complex since the supply channels on the top and the bottom have to be manufactured with very high precision.
  • the mixing ratio of the two separation media results from the size ratio of the two channel cross sections. If the mixing ratio is to be changed, the release agent distributor must be replaced, which affects production.
  • the mixture must have a certain consistency, which is important for a uniform and stable separating layer between the tread of the mold and the metal strand. It is also important that the separating layer also has a thermally insulating effect, since the mold is cooled and the heat transfer zone between the metal strand and the mold is to be influenced in a targeted manner.
  • An optimal separation layer is a prerequisite for a good surface quality and structural quality of the metal strand. For further processing, it is important that a certain surface quality is achieved. For example, the surface quality when pressing the metal strand determines the pressing residue, which is a waste product, the accumulation of which should be as low as possible.
  • the object of the present invention is to further develop a device and a method of the type mentioned at the outset in such a way that an improved separating layer is produced in a simple manner between the tread of the mold and the metal strand.
  • the invention is based on the knowledge that a separation layer with an optimal consistency can be produced between the metal strand and the tread of the mold if the liquid and the gaseous separation medium are atomized in a predeterminable ratio before it emerges on the tread.
  • the pressure and the amount of the gaseous and the liquid separation medium can be precisely controlled in the atomizing device, so that the composition of the separation medium mist can be regulated within wide ranges.
  • the separation medium mist has a very small droplet size and is therefore particularly stable, so that only a small amount of liquid separation medium has to be used.
  • the separation medium mist has a good thermal insulation effect.
  • the liquid separation medium is preferably sucked in by the gaseous separation medium in an atomizing device by means of an injector action and atomized or atomized to form a separation medium mist by means of at least one nozzle.
  • a device for the continuous casting of metal, in particular non-ferrous metal with a mold, in the open cross-section of which the metal melt solidifies and which has a running surface for the metal strand, with a refractory attachment which sits on the mold and one has open cross-section, through which molten metal is fed and with a channel system for a liquid and a gaseous separation medium, the channel system leading to the running surface, characterized in that at least one atomization device each has an inlet for the liquid and the gaseous separation medium and at least one atomization element for atomizing the liquid separation medium by means of the gaseous separation medium to form a separation medium mist and that the atomization device is connected on the outlet side to the channel system of the mold.
  • one or more atomizing devices can be used.
  • the atomizing element of the atomizing device is preferably designed as a nozzle.
  • a particularly advantageous embodiment is that the atomizing device is designed as a separate component.
  • the manufacturing effort is low because known atomization devices for liquids can be used. It is also advantageous that molds in use can be retrofitted with atomizing devices.
  • the atomization device has a circumferential distribution channel for the liquid separation medium and the gaseous separation medium, and that the distribution channels have a plurality of outlet openings on the circumference, which are arranged such that the liquid separation medium is atomized by means of the gaseous separation medium.
  • the refractory attachment forms an overhang in the area of the open cross section of the mold, which forms a gap zone with the running surface in which the channel system ends. This ensures that the separation medium mist forms a separation layer in the area of the meniscus, which extends downwards towards the metal strand.
  • the separation medium mist is fed to the tread through the channel system, which can be simplified because the gaseous and the liquid separation medium only have to be guided separately to the atomizing device and not to the tread.
  • the channel system has at least one circumferential supply channel, in which at least one supply channel ends and from which a plurality of supply channels depart, and that the supply channel and / or the supply channels are open at the top in the top of the mold and from a cover plate is covered, which is detachably connected to the mold.
  • the channel system has a first supply channel, in which a first supply channel ends, which is connected to the atomization device and from which a plurality of second supply channels depart, which end in a second supply channel and that a plurality of third supply channels depart from the second supply channel , which end on the tread.
  • a porous pressure distributor is advantageously located in the first supply channel in the flow path of the separation medium mist in order to further even out the mist.
  • the invention also offers the possibility of designing the atomizing device all around and arranging it in a supply channel.
  • the invention further proposes that the first and second supply channels have an approximately square cross section, the cross-sectional area of the first supply channel being at least 1 to 50 times the cross section of the second supply channel.
  • the cross-sectional area of the supply channel is preferably at least 1 to 50 times the cross-section of the inlet-side supply channel.
  • the tread of the mold is advantageously formed by a tread insert which is inserted into the mold.
  • Figure 1 is a partial section of a first embodiment of the device according to the invention.
  • Figure 1 is a partial section of a second embodiment of the device according to the invention.
  • FIG. 3 shows a schematic plan view of an embodiment of the device according to the invention according to FIG. 1.
  • a mold 1 has an open cross section 2 in which the molten metal solidifies.
  • a tread 3 for a metal strand is formed by a tread insert 3a, which consists of graphite and is inserted into the mold.
  • the tread insert can also be made of another suitable material, such as. B. copper or aluminum.
  • the mold 1 has a coolant chamber 4 in the usual way, with the inner holes 5 are connected, which lead in the vicinity of the tread 3 of the mold 1.
  • At least one atomizing device 11 is connected to the channel system 10.
  • Each atomizing device 11 has an inlet 12 which is connected to a line for a liquid separation medium.
  • An input 13 is connected to a line for a gaseous separation medium.
  • Each atomizing device 11 has an outlet opening 14 which is connected to the channel system 10 of the mold.
  • the atomizing device 11 is designed as a separate component.
  • the liquid separation medium is sucked from the gaseous separation medium by means of a propellant gas nozzle, not shown, by means of an injector and atomized to form a separation medium mist.
  • the outlet opening 14 of the atomizing device 11 is designed as an atomizing element in the form of a nozzle.
  • the pressure and the amount of the gaseous and the liquid separation medium can be precisely controlled in the atomizing device 11, so that the composition of the separation medium mist can be regulated within wide ranges.
  • the separation medium mist has a particularly small droplet size and is therefore special load-bearing, so that only a little liquid separation medium has to be used.
  • the separation medium mist has a good thermal insulation effect.
  • atomizing devices 11 are connected to the mold 1, which oppose each other.
  • more atomizing devices can be used, for example eight pieces in the case of molds with a large cross section, which are evenly distributed around the circumference of the mold.
  • the atomizing device 11 is formed in the mold 1.
  • the design of the atomizing device essentially corresponds to that from FIG. 1.
  • the channel system 10 has a first supply channel 15 which ends in a circumferential, here annular first supply channel 16.
  • the cross section of the first supply channel 16 is relatively large in relation to the cross section of the only first supply channel 15 and is up to 50 times the latter cross section.
  • first supply channel 16 there is a circumferential porous pressure distributor 17 in the flow path of the separation medium mist in order to further equalize the separation medium mist.
  • second supply channels 18, which are evenly distributed over the circumference, emanate from the first supply channel 16 and end in a circumferential, here annular second supply channel 19 in which the separation medium mist is further stabilized.
  • a multiplicity of third feed channels 20 start from the second supply channel and end in the gap zone 9, which is formed between the overhang 8 of the refractory attachment and the mold running surface 3.
  • the third Feed channels are made on the top of the mold 1 and the tread insert 3a.
  • the third feed channels 20 are designed such that the separation medium mist is guided and maintained.
  • the first and the second supply ducts 16, 19 and / or the third feed ducts 20 are or are designed to be open at the top in the top of the mold or the tread insert and are covered by a cover plate 21 which is releasably connected to the mold 1.
  • the separation medium mist forms a closed separation layer between the mold and the metal strand.
  • the droplet size of the liquid separation medium is very small, which is important for good thermal insulation properties and the formation of a uniform and stable separation layer between the tread of the mold and the metal strand.
  • the result is a good surface quality of the metal strand, which results in good further processing.
  • the surface layer or the edge zone is very thin, so that little waste arises during the subsequent further processing of the metal strand, for example by means of pressing.
  • the device according to the invention can be used for casting different shapes, for example rectangular shapes or shapes derived from round or rectangular shapes.
  • the atomizing device can be designed to run all the way round and be integrated into a supply channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un procédé et un dispositif de coulée continue de métal, en particulier de métal non ferreux. Le dispositif selon l'invention comprend une coquille (1) présentant une section transversale ouverte (2) dans laquelle le métal en fusion se solidifie et présentant une surface de passage (3) pour la barre métallique de coulée continue. Ce dispositif comprend par ailleurs une rehausse (6) réfractaire placée sur la coquille (1) et présentant une section transversale ouverte (7) à travers laquelle du métal en fusion est acheminé, ainsi qu'un système de canal (10) destiné à acheminer un agent de séparation liquide et un agent de séparation gazeux, ce système de canal (10) conduisant à la surface de passage (3). Selon l'invention, au moins une unité de pulvérisation (11) présentant une entrée respective (12, 13) pour l'agent de séparation liquide et l'agent de séparation gazeux et pourvue d'au moins un élément de pulvérisation (14) servant à pulvériser l'agent de séparation liquide en un brouillard d'agent de séparation au moyen de l'agent de séparation gazeux est raccordée au système de canal (10) de la coquille (1) côté sortie de sorte que le brouillard d'agent de séparation soit acheminé jusqu'à la surface de passage (3).
EP04764936A 2003-10-17 2004-09-08 Procede et dispositif de coulee continue de metal Withdrawn EP1673187A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003149132 DE10349132A1 (de) 2003-10-17 2003-10-17 Verfahren und Vorrichtung zum Stranggießen von Metall
PCT/EP2004/009993 WO2005042185A1 (fr) 2003-10-17 2004-09-08 Procede et dispositif de coulee continue de metal

Publications (1)

Publication Number Publication Date
EP1673187A1 true EP1673187A1 (fr) 2006-06-28

Family

ID=34428509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04764936A Withdrawn EP1673187A1 (fr) 2003-10-17 2004-09-08 Procede et dispositif de coulee continue de metal

Country Status (4)

Country Link
EP (1) EP1673187A1 (fr)
CN (1) CN1867414A (fr)
DE (1) DE10349132A1 (fr)
WO (1) WO2005042185A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598763A (en) * 1982-10-20 1986-07-08 Wagstaff Engineering, Inc. Direct chill metal casting apparatus and technique
DE3533517A1 (de) * 1985-09-20 1987-04-02 Vaw Ver Aluminium Werke Ag Verfahren und vorrichtung zum stranggiessen
FR2672524B1 (fr) * 1991-02-11 1993-05-28 Siderurgie Fse Inst Rech Lingotiere pour coulee continue de produits metalliques.
DE4203337C2 (de) * 1992-02-06 1994-07-07 Vaw Ver Aluminium Werke Ag Verfahren zum Stranggießen von Metallen
DE4212531C1 (de) * 1992-04-15 1993-10-21 Vaw Ver Aluminium Werke Ag Gas- und Trennmittelzuführungs- und Verteilungssystem für eine Vorrichtung zum Stranggießen
DE19743689C2 (de) * 1997-10-02 1999-11-11 Frank Doernenburg Trennmittelgemisch sowie Stranggußverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005042185A1 *

Also Published As

Publication number Publication date
CN1867414A (zh) 2006-11-22
DE10349132A1 (de) 2005-05-12
WO2005042185A1 (fr) 2005-05-12

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