EP0035958B1 - Coquille pour coulée continue - Google Patents

Coquille pour coulée continue Download PDF

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Publication number
EP0035958B1
EP0035958B1 EP81710011A EP81710011A EP0035958B1 EP 0035958 B1 EP0035958 B1 EP 0035958B1 EP 81710011 A EP81710011 A EP 81710011A EP 81710011 A EP81710011 A EP 81710011A EP 0035958 B1 EP0035958 B1 EP 0035958B1
Authority
EP
European Patent Office
Prior art keywords
hot
wall
continuous
compressed gas
casting
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.)
Expired
Application number
EP81710011A
Other languages
German (de)
English (en)
Other versions
EP0035958A2 (fr
EP0035958A3 (en
Inventor
Siegfried Prof. Dr.Ing. Engler
Herbert Dipl.-Ing. Woithe
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT81710011T priority Critical patent/ATE8467T1/de
Publication of EP0035958A2 publication Critical patent/EP0035958A2/fr
Publication of EP0035958A3 publication Critical patent/EP0035958A3/de
Application granted granted Critical
Publication of EP0035958B1 publication Critical patent/EP0035958B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • 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
    • B22D11/04—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

Definitions

  • the invention relates to a continuous casting mold, with a gas-permeable wall through which compressed gas emerges in the lateral direction in the direction of the melt, and with a hot head arranged above the gas-permeable wall, the wall of which is offset inwards relative to the gas-permeable wall and the lower region of which is a hot head overhang forms.
  • the continuous casting mold has a hot head overhang.
  • the mold wall is cooled.
  • the hot head with its overhang is movable in the direction of the mold axis and has the shape of a sleeve in order to be able to change the axial length of the mold wall which comes into contact with the liquid metal during the casting process, without the amount of the melt in the continuous casting mold being changed got to.
  • the melt therefore comes into contact with the mold wall.
  • the compressed gas which is partially introduced from above into a gap formed between the hot head overhang or the sleeve on the one hand and the positively cooled mold wall on the other hand, is used to control the melt level.
  • the continuous casting mold known from FR-A-2 090 111 also has a force-cooled mold wall without a hot head, which is known to always consist of a material of particularly low thermal conductivity, such as fireclay, asbestos or the like. Rather, the inner mold wall is provided with a coating of gas-forming plastic that is about 5 mm thick at the start of a casting process. A pressure gas cushion built up by an evaporation-like process is intended to prevent contact between the melt or the solidifying metal and the coated mold wall.
  • this embodiment has the disadvantage that with increasing wear of the Teflon layer during a casting process, the diameter of the strand becomes ever larger. Precise casting of the strand is therefore impossible. An uneven cast strand cross section is inevitably obtained.
  • the quantity of compressed gas that can be achieved in this way is also very limited, so that in practice the contact between the melt and the mold wall cannot be prevented with certainty because the pressure of the gas cushion is too low.
  • a continuous casting mold of the type mentioned at the outset is to be designed such that the hot head is connected to the gas-permeable wall and that the wall is arranged free of liquid cooling acting as primary cooling.
  • holder parts which serve to support the hot head and / or the gas-permeable wall, can intervene between the hot head and the wall, provided that they no longer come into contact with the melt during the ongoing casting operation.
  • the known radial heat flow from the inside to the outside - in particular caused by a primary cooling by means of a water-cooled mold wall and by direct contact between the melt and the mold wall - is largely prevented. This reduces the growth of the outer shells.
  • the invention also includes some constructive configurations of the continuous casting mold according to subclaims 2 to 6.
  • the invention also extends to a production method according to claim 7 which is suitable for the operation of the described casting mold.
  • the continuous casting mold shown in FIG. 1 has an outer jacket part 11 and an insert part 12. Together with a bottom part 13 and a wall part 14, these form an annular space 15 which is closed in the circumferential direction and in which the water required for cooling is contained. Between the insert part 12, on the one hand, and the base part 13 and the wall part 14, on the other hand, a ring-shaped channel 16 is formed, through which water is distributed over the circumference of a casting strand 17 to the outer peripheral surface thereof.
  • the wall part 14 ensures a uniform supply of the water fed into the annular space 15 at any point over the circumference.
  • the mold has a hot head 18 made of heat-insulating material, which among other things also serves to prevent the liquid melt introduced into the mold from cooling.
  • the hot head 18 has an inwardly projecting wall 19 in contact with the melt, which at its deepest point merges into an obliquely upward and inclined underside 20.
  • a porous wall 21 adjoins the wall 19 offset to the outside. The part of the hot head 18 protruding inwards from this represents the hot head overhang 22.
  • an annular space 23 is formed by the insert part 12, the hot head 18 and by the wall 21 itself, to which gas flows via at least one channel 24 is fed under pressure.
  • the supply can alternatively also take place wholly or partly via cavities which are formed here in the form of a network 25 in the hot head 18 and in which heat can be exchanged between the gas and the hot head 18. If necessary, the mold and in particular its area formed by the hot head 18 can be additionally heated, for example by means of an electrical heater (not shown here).
  • a solidification front designated by reference number 27 runs between the liquid melt, which is designated here by reference number 26, and the casting strand 17, which is made of solidified material.
  • the casting strand 17 is lowered in accordance with the progress of the solidification, with new melt 26 being added at the same time.
  • the gas supplied to the annular space 23 has a temperature which corresponds approximately to the liquidus temperature and is therefore only slightly lower than the temperature of the supplied melt 26.
  • the pressure and the quantity of gas supplied in the annular space 23 are such that the gas pressure in the compressed gas cushion is approximately that The sum of the atmospheric pressure and the metallostatic pressure of the melt 26 in the region of the wall 21 corresponds.
  • the pressure gas emerging from this can make contact between the wall 21 and the part of the underside 20 of the hot head 18 adjoining it, on the one hand, and the oxide skin on the outside of the casting strand 17 and in the region of the not yet solidified melt 26, on the other hand, by forming a corresponding pressure gas cushion prevent.
  • Heat dissipation in the radial direction to the outside is prevented by the temperature of the gas.
  • the solidification front 27 therefore also has a relatively flat course in the outer region, which shows that the edge-shell effect otherwise caused by primary cooling is not or at least barely present.
  • the gas can only escape downward, since the lowest point of the wall 19 is lower than the highest point of the cross-sectional part of the melt located below the hot head overhang 22.
  • the embodiment shown in FIG. 2 contains only a differently designed hot head 28 with a lateral wall 29 protruding into the melt 26.
  • a downwardly open annular recess 30 of approximately U-shaped cross section forms the underside of the hot head overhang 31.
  • the supply of the heated and pressurized gas takes place through one or more channels 32.
  • the lowest point of the wall 29 is below the highest point in the area of the recess 30 sensitive cross-sectional area of the melt 26.
  • the lower area of the hot head 28 is designed as a porous wall 37, behind which there is an annular space 38. Channels 39 open into these, through which heated compressed gas can be supplied, as can channels 32.
  • the gas supplied can only escape downwards along the outside of the casting strand 17 and cannot escape upwards along the wall 29.
  • FIG. 3 shows a further embodiment only for a hot head 33, the hot head overhang 34 of which now has an obliquely downward nose from which the wall 35 projecting into the melt 26 extends upwards.
  • a portion of the heated and pressurized gas is supplied via channels 36 on the underside of the hot head overhang 34.
  • the lower region of the hot head 33 is also designed as a porous wall 40, behind which an annular space 41 is located.
  • the hot head is stationary, because a movable arrangement of the same does not bring any advantages in terms of casting technology and would only increase the technical outlay.
  • the method proposed by the invention can be used advantageously not only for the continuous casting of aluminum and aluminum alloys, but generally for non-ferrous metals, for example for copper and magnesium, and their alloys.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (10)

1. Lingotière de coulée continue, pourvue d'une paroi perméable aux gaz (21, 37, 40), à travers laquelle du gaz sous pression sort latéralement en direction de la fonte (26), et d'une tête chauffante (18, 28, 33), disposée au-dessus de la paraoi de lingotière, dont une face est déplacée vers l'intérieur par rapport à ladite paroi perméable aux gaz (21, 37, 40) et dont une zone inférieure forme une partie débordante de tête chauffante (22, 31, 34), caractérisée en ce que la tête chauffante (18, 28, 33) est reliée à la paroi perméable aux gaz (21, 37, 40) et en ce que la paroi perméable aux gaz (21,37,40) est disposée indépendamment d'un refroidissement par liquide agissant comme refroidissement primaire.
2. Lingotière de coulée continue suivant la revendication 1, caractérisée en ce que le point le plus bas de la partie débordante de tête chauffante (22, 31, 34) se trouve plus bas que le point le plus haut de la paroi perméable aux gaz (21, 37, 40).
3. Lingotière de coulée continue suivant l'une quelconque des revendications 1 et 2, caractérisée en ce que la face inférieure de la partie débordante de tête chauffante (31, 34) présente des orifices de sortie (32, 36), à travers lesquels sort un courant de gaz sous pression additionnel dirigé vers le bas.
4. Lingotière de coulée continue suivant l'une quelconque des revendications précédentes, caractérisée en ce que des parties de la tête chauffante (18) présentent des cavités traversées par le gaz et dans lesquelles de la chaleur est échangée entre le gaz et la tête chauffante (18).
5. Lingotière de coulée continue suivant l'une quelconque des revendications précédentes, caractérisée en ce que la tête chauffante (18, 28, 33) est chauffée par le gaz sous pression et/ou électriquement.
6. Lingotière de coulée continue suivant l'une quelconque des revendications précédentes, caractérisée en ce que la partie débordante de tête chaffante (22, 31, 34) est disposée de manière fixe.
7. Procédé pour la fabrication par coulée continue d'un demi-produit au moyen d'une lingotière de coulée continue, conformée suivant une ou plusieurs des revendications 1 à 6, caractérisée en ce que la fonte (26), pendant le cours du processus de coulée s'appuie sans contact contre les parties de lingotière se trouvant sous la partie débordante de tête chauffante (22, 31, 34) au moyen d'une matelas de gaz sous pression, en ce que le gaz sous pression est amené à la fonte à une température se trouvant au moins 100° C au-dessus de la température ambiante, et en ce que la pression du matelas de gaz sous pression est d'une grandeur telle que la fonte (26) pendant le cours du processus de coulée ne touche pas la partie de lingotière (21, 37, 40) se trouvant sous la tête chauffante (18, 28, 33).
8. Procédé suivant la revendication 7, caractérisée en ce que la lingotière de coulée continue est chauffée avant le commencement du processus de coulée.
9. Procédé suivant l'une quelconque des revendications 7 et 8, caractérisée en ce que le gaz sous pression est amené à une température si élevée que dans la zone du matelas de gaz sous pression un transport de chaleur dirigé radialement vers l'extérieur à partir de la fonte (26) et par suite un développement de croûte solidifiée sur les bords sont fortement arrêtés..
10. Procédé suivant l'une quelconque des revendications 7 à 9, caractérisée en ce que pour former le matelas de gaz sous pression on utilise du bioxyde de carbone, de l'azote, de l'argon, de l'air ou de mélanges de ces gaz.
EP81710011A 1980-03-07 1981-03-04 Coquille pour coulée continue Expired EP0035958B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81710011T ATE8467T1 (de) 1980-03-07 1981-03-04 Stranggiesskokille.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3008781 1980-03-07
DE3008781A DE3008781C2 (de) 1980-03-07 1980-03-07 Verfahren zum Stranggießen von Metallen

Publications (3)

Publication Number Publication Date
EP0035958A2 EP0035958A2 (fr) 1981-09-16
EP0035958A3 EP0035958A3 (en) 1981-11-25
EP0035958B1 true EP0035958B1 (fr) 1984-07-18

Family

ID=6096546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81710011A Expired EP0035958B1 (fr) 1980-03-07 1981-03-04 Coquille pour coulée continue

Country Status (3)

Country Link
EP (1) EP0035958B1 (fr)
AT (1) ATE8467T1 (fr)
DE (2) DE3008781C2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534832A1 (fr) * 1982-10-20 1984-04-27 Wagstaff Engineering Inc Appareil et technique de coulee directe en coquille de metaux
GB2129345A (en) * 1982-10-15 1984-05-16 Alcan Int Ltd Continuous casting of aluminium alloy
US4598763A (en) * 1982-10-20 1986-07-08 Wagstaff Engineering, Inc. Direct chill metal casting apparatus and technique
FR2585597A1 (fr) * 1985-07-30 1987-02-06 Pechiney Aluminium Procede et dispositif de coulee en charge de metaux
EP0213049A1 (fr) * 1985-07-30 1987-03-04 Aluminium Pechiney Procédé et dispositif de coulée en charge de métaux
WO1991006386A1 (fr) * 1989-11-01 1991-05-16 Alcan International Limited Procede de regulation de la vitesse d'extraction thermique lors du moulage de pieces coulees
US5873405A (en) * 1997-06-05 1999-02-23 Alcan International Limited Process and apparatus for direct chill casting
US6260605B1 (en) 1996-04-05 2001-07-17 Ugine-Savoie Imphy Facility and method for the continuous casting of metals
CN110842048A (zh) * 2019-11-27 2020-02-28 杭州富通电线电缆有限公司 一种生产铜杆的方法及铜杆拉丝装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3207777C2 (de) * 1982-03-04 1984-09-06 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Verfahren und Vorrichtung zum Rohrstranggießen von Metallen, inbes. Nickel- und Kobaltlegierungen
BE1015358A3 (fr) * 2003-02-12 2005-02-01 Ct Rech Metallurgiques Asbl Procede et dispositif pour la coulee continue en charge d'un metal en fusion.
US7077186B2 (en) * 2003-12-11 2006-07-18 Novelis Inc. Horizontal continuous casting of metals
US7322397B2 (en) * 2004-11-16 2008-01-29 Rmi Titanium Company Continuous casting of reactionary metals using a glass covering
CN105108080B (zh) * 2015-08-05 2017-03-29 东北大学 抑制镁合金锭坯开裂的半连续铸造结晶器及其使用方法
CN110340329A (zh) * 2019-08-28 2019-10-18 江苏亚太航空科技有限公司 一种铝及铝合金低压半连续铸造结晶器冷却系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE833394C (de) * 1942-01-14 1952-03-06 Wieland Werke Ag Giessform zum stetigen Giessen von Metallen
DE869541C (de) * 1943-10-23 1953-03-05 Wieland Werke Ag Beheizte Giessform zum stetigen Giessen von Metallen
SU339099A1 (ru) * 1970-05-18 1977-12-05 Livanov V A Кристаллизатор дл непрерывной отливки слитков
DE2518903A1 (de) * 1974-07-12 1976-01-22 Atsumi Ohno Stranggiessverfahren und -vorrichtung
GB2014487B (en) * 1978-02-18 1982-06-16 British Aluminium Co Ltd Varying metal-mould contact in continous casting
NO790471L (no) * 1978-02-18 1979-08-21 British Aluminium Co Ltd Stoepemetaller.

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129345A (en) * 1982-10-15 1984-05-16 Alcan Int Ltd Continuous casting of aluminium alloy
AU567872B2 (en) * 1982-10-20 1987-12-10 Wagstaff Engineering, Inc. Direct chill casting
GB2129344A (en) * 1982-10-20 1984-05-16 Wagstaff Engineering Inc Direct chill casting
JPS5992147A (ja) * 1982-10-20 1984-05-28 ワグスタツフ・エンジニアリング・インコ−ポレイテツド 直接チル鋳造方法並びにその装置
US4598763A (en) * 1982-10-20 1986-07-08 Wagstaff Engineering, Inc. Direct chill metal casting apparatus and technique
JPS6147622B2 (fr) * 1982-10-20 1986-10-20 Wagusutatsufu Eng Inc
FR2534832A1 (fr) * 1982-10-20 1984-04-27 Wagstaff Engineering Inc Appareil et technique de coulee directe en coquille de metaux
FR2585597A1 (fr) * 1985-07-30 1987-02-06 Pechiney Aluminium Procede et dispositif de coulee en charge de metaux
EP0213049A1 (fr) * 1985-07-30 1987-03-04 Aluminium Pechiney Procédé et dispositif de coulée en charge de métaux
FR2599650A2 (fr) * 1985-07-30 1987-12-11 Pechiney Aluminium Dispositif de coulee en charge de metaux
WO1991006386A1 (fr) * 1989-11-01 1991-05-16 Alcan International Limited Procede de regulation de la vitesse d'extraction thermique lors du moulage de pieces coulees
US6260605B1 (en) 1996-04-05 2001-07-17 Ugine-Savoie Imphy Facility and method for the continuous casting of metals
US5873405A (en) * 1997-06-05 1999-02-23 Alcan International Limited Process and apparatus for direct chill casting
CN110842048A (zh) * 2019-11-27 2020-02-28 杭州富通电线电缆有限公司 一种生产铜杆的方法及铜杆拉丝装置
CN110842048B (zh) * 2019-11-27 2021-05-28 杭州富通电线电缆有限公司 一种生产铜杆的方法及铜杆拉丝装置

Also Published As

Publication number Publication date
DE3008781A1 (de) 1981-09-17
DE3008781C2 (de) 1982-08-26
EP0035958A2 (fr) 1981-09-16
ATE8467T1 (de) 1984-08-15
DE3164805D1 (en) 1984-08-23
EP0035958A3 (en) 1981-11-25

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