EP0231216A1 - Procede et dispositif de coulee de bandes metalliques cristallines - Google Patents

Procede et dispositif de coulee de bandes metalliques cristallines

Info

Publication number
EP0231216A1
EP0231216A1 EP19860904062 EP86904062A EP0231216A1 EP 0231216 A1 EP0231216 A1 EP 0231216A1 EP 19860904062 EP19860904062 EP 19860904062 EP 86904062 A EP86904062 A EP 86904062A EP 0231216 A1 EP0231216 A1 EP 0231216A1
Authority
EP
European Patent Office
Prior art keywords
heat sink
cooling
melt
control device
strip
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Withdrawn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
EP19860904062
Other languages
German (de)
English (en)
Inventor
Wilfried Heinemann
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.)
Concast Standard AG
Original Assignee
Concast Standard AG
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 Concast Standard AG filed Critical Concast Standard AG
Publication of EP0231216A1 publication Critical patent/EP0231216A1/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Withdrawn legal-status Critical Current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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires

Definitions

  • the invention relates to a method for casting crystalline strips according to the preamble of patent claim 1 and an apparatus for performing this method.
  • Metal strips in particular steel strips, are usually manufactured in several process steps, which are energy and time consuming.
  • a slab is first produced using the continuous processing method, which in the most favorable case is fed directly into the rolling mill, but is generally first cooled and then reheated and then in a rolling mill to the desired level in several steps
  • Strip thickness is reduced.
  • the rolling process usually takes place in several stages.
  • Various measures have already been proposed to reduce the time and energy required to implement the method. Attempts have already been made to continuously roll starting material continuously emerging from the continuous casting plant, but this has led to other difficulties since the maximum casting speed at which the strand leaves the casting plant is significantly lower than the minimum rolling speed at which the rolling mills can be operated.
  • Another reduction in rolling Speed in adaptation to the continuous flow is technically and economically not sensible, since the quality of the rolled products obtained in this way is unsatisfactory and the durability of the rolls is greatly reduced.
  • the object of the present invention is to provide a method and a device for casting crystalline strips which allow the strips to be produced as directly as possible from the melt, so that the product or the intermediate product is treated several times, in particular a multiple energy-consuming, alternate heating and cooling is avoided.
  • this object is achieved by the features defined in patent claims 1 and 7.
  • This measure provides a simple, coherent and energy-saving method for the direct production of crystalline strips in a particularly advantageous manner for mass products, for example for mass steels.
  • This method also allows the casting speed to be adapted to subsequent processing steps, for example to a subsequent rolling process, without the material having to be interrupted. This also results in a considerable simplification for a device for casting metals into crystalline strips, so that corresponding systems can be economically constructed and used.
  • FIG. 1 is a schematic representation of a device according to a described embodiment
  • Fig. 2 the principle of the melt supply to the moving cooling body
  • FIG. 3 the representation of the designations on the nozzle opening.
  • the device shown essentially consists of a heat sink 1, which in the example is designed as a rotating drum.
  • the drum rotates in the direction of arrow A.
  • the drum surface consists of a good heat-conducting material, in the example of copper or a copper alloy.
  • the surface can be coated with different alloys in order to optimally adapt the surface tension and cooling effect.
  • a nozzle body 2 with a nozzle outlet 3 is arranged in the effective area of the drum surface. In the area between the nozzle body 2 and the nozzle outlet 3 there is an electromagnetic inflow control 4 in the example.
  • nozzle body 2 and storage container 5 form a closed pressure system, as is symbolically indicated by pressure medium 6.
  • a heating device 7 is provided, which in particular brings the lower region of the nozzle body 2 to a specific operating temperature and maintains it.
  • the heating device 7 is monitored and controlled by a control device 8.
  • the control device 8 preferably also monitors and controls the pressure P of the pressure medium 6.
  • the nozzle body 2 and / or the reservoir 5 can be equipped with a fill level indicator 9, the signals of which are also fed to the control device 8 for monitoring the overall process.
  • the molten metal discharged from the nozzle body via the nozzle outlet 3 is applied directly to the surface of the heat sink 1.
  • the heat sink 1 is continuously cooled on its pouring surface, as is indicated, for example, by a coolant container 15.
  • a coolant 16 contained therein wets the surface of the heat sink 1 and extracts a quantity of heat from it which, in conjunction with other cooling measures described below, leads to the solidification of the molten metal on the heat sink surface.
  • coolant 16 can be conveyed onto the inner wall of the heat sink 1, so that an additional cooling effect occurs on this side.
  • a fluid for example water or another medium with a large heat absorption capacity, is preferably used as the coolant.
  • a cooling device 10 is provided behind the nozzle outlet 3 in the direction of rotation A, which directly on the outer surface of the cast strip 20, ie on the side of the strip facing away from the cooling body 20 acts.
  • the cooling device 10 is also connected to the control device 8, so that the coolant quantity and coolant temperature adjust or set to certain values. let it settle.
  • a deflection and cooling roller 11 which, in connection with a subsequent pulling element 12, detaches the band 20 from the surface of the cooling body 1, deflects it in a direction B and cools it at the same time.
  • the deflection and cooling roller 11 is preferably also cooled from the outside and / or from the inside and for this purpose, for example, the same coolant 16 is applied to it as the other cooling elements mentioned.
  • the coolant supply or coolant 11empe ratu r for the deflection and cooling roller 11 is preferably monitored or controlled by the control device 8.
  • the deflecting and cooling roller 11 preferably has a relatively large diameter, which in the example is only slightly smaller than that of the cooling drum used as a heat sink.
  • the belt 20 is continued in the direction B from the guiding device and is wound directly into a bundle 13. Instead, the belt 20 can also be fed directly to a rolling device 25 for further processing.
  • the nozzle body 2, in particular the nozzle outlet 3, consist of thermally insulating and chemically inert material, e.g. from K-erami parts. These parts must also withstand the melting temperature of the metal to be cast for a long time and, moreover, must not chemically change the metal.
  • the thermal aftertreatment of the cast strip 20 is preferably carried out in various stages, specifically under the control of the control device 8.
  • a first stage K the strip 20 is cooled directly via the surface of the heat sink 1, that is to say by controlling the temperature ⁇ door for the coolant 16, be it from the outer heat sink surface or from the inside, or combined by both measures.
  • a second stage L the surface of the cast strip 20 is immediately intensively cooled.
  • a third cooling stage M the surface of the belt 20 is subjected to a final forced cooling process by contact with the deflection and cooling roller 11.
  • the temporal gradient of the cooling can be set with the aid of the successive cooling stages K, L and M. Maintaining the gap d1 between the nozzle outlet 3 and the casting surface of the heat sink 1 is of particular importance for a smooth running of the casting process.
  • setting means 30 are provided, with the aid of which the nozzle body 2 can be adjusted along a guide line 34 via guide elements 32.
  • the gap d1 is connected to the surface tension of the melt and the dynamic pressure P for a given melt flow rate and given speed u of the surface of the heat sink 1 with respect to the nozzle outlet 3 via the following relationship:
  • the quantity and pressure control of the metallic melt can be adjusted in a simple manner by means of the electromagnetic flow control 4 in the nozzle outlet area.
  • the drum surface was moved at a gap d1 of 2.9 mm opposite the nozzle outlet 3 at a speed in the range between 1 and 5 m per second.
  • a cooled belt or a similar cooling and / or guiding device can also be provided.
  • the cast strip 20 After passing through the deflection and cooling roller 11, the cast strip 20 can be subjected to a further thermal and / or mechanical aftertreatment, e.g. be subjected to a cooled pair of rollers.

Landscapes

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

Abstract

Des bandes cristallines d'une fonte métallique provenant d'au moins un réservoir de stockage sont coulées par au moins une ouverture de tuyère sur la surface d'un corps de refroidissement en mouvement, la fonte étant déposée depuis une distance réglable (d1) sur la surface du corps de refroidissement (1) via des organes d'alimentation (2, 3) thermiquement isolants et chimiquement inertes. La bande qui se solidifie sur la surface du corps de refroidissement (1) est refroidie en plusieurs étapes (K, L, M) et/ou soumise à un traitement thermique et/ou mécanique ultérieur, puis enroulée.
EP19860904062 1985-07-21 1986-07-21 Procede et dispositif de coulee de bandes metalliques cristallines Withdrawn EP0231216A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3138/85 1985-07-21
CH313885A CH667023A5 (de) 1985-07-21 1985-07-21 Verfahren und vorrichtung zum giessen von kristallinen metallbaendern.

Publications (1)

Publication Number Publication Date
EP0231216A1 true EP0231216A1 (fr) 1987-08-12

Family

ID=4249436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860904062 Withdrawn EP0231216A1 (fr) 1985-07-21 1986-07-21 Procede et dispositif de coulee de bandes metalliques cristallines

Country Status (3)

Country Link
EP (1) EP0231216A1 (fr)
CH (1) CH667023A5 (fr)
WO (1) WO1987000461A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108160961A (zh) * 2017-11-23 2018-06-15 昆明理工大学 一种气体辅助连续铸挤的方法及装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782473A (en) * 1953-03-20 1957-02-26 Joseph B Brennan Continuous casting method and apparatus
CH622725A5 (en) * 1977-08-26 1981-04-30 Erik Allan Olsson Method and apparatus for casting a metal band
DE3248473A1 (de) * 1982-12-29 1984-07-12 Fried. Krupp Gmbh, 4300 Essen Verfahren zum zufuehren von stahlschmelze in eine giessvorrichtung mit in giessrichtung bewegten kokillenwaenden und zufuehrvorrichtung zur durchfuehrung des verfahrens
JPS6033856A (ja) * 1983-08-02 1985-02-21 Hitachi Metals Ltd 合金薄板製造装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8700461A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108160961A (zh) * 2017-11-23 2018-06-15 昆明理工大学 一种气体辅助连续铸挤的方法及装置
CN108160961B (zh) * 2017-11-23 2020-07-31 昆明理工大学 一种气体辅助连续铸挤的方法

Also Published As

Publication number Publication date
CH667023A5 (de) 1988-09-15
WO1987000461A1 (fr) 1987-01-29

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Inventor name: HEINEMANN, WILFRIED