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WO1998003287A1 - Dispositif de refroidissement pour roue de coulee - Google Patents

Dispositif de refroidissement pour roue de coulee Download PDF

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Publication number
WO1998003287A1
WO1998003287A1 PCT/DE1997/001522 DE9701522W WO9803287A1 WO 1998003287 A1 WO1998003287 A1 WO 1998003287A1 DE 9701522 W DE9701522 W DE 9701522W WO 9803287 A1 WO9803287 A1 WO 9803287A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
ring
wheel
casting
coolant
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.)
Ceased
Application number
PCT/DE1997/001522
Other languages
German (de)
English (en)
Inventor
Otto Vollack
Bernd Jopp
Matthias Proksch
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.)
Individual
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 AU41983/97A priority Critical patent/AU4198397A/en
Publication of WO1998003287A1 publication Critical patent/WO1998003287A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B22D11/0637—Accessories therefor
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces

Definitions

  • the invention relates to a cooling device for a casting wheel for the continuous casting of metals or metal alloys.
  • the following solutions are used for the cooling process.
  • the cooling process takes place via cooling channels running in the casting wheel, which are supplied with coolant by a guide device fixed in the casting wheel.
  • Another solution for cooling consists in the fixed arrangement of spray nozzles, which are preferably arranged inside and partly outside on both sides around the casting wheel and which influence the cooling process by means of a corresponding flow rate control.
  • the casting wheel is known to be cooled using a device consisting of nozzle or cooling channels, the cooling device preferably being arranged (recooling of the mold) in the area in which the Conversion zone located from the liquid to the solid state for the melt.
  • nozzle systems or channels adapted to the process are installed to control the cooling process. These can only be replaced when the casting machine is at a standstill. For better targeted cooling, additional spray nozzles are sometimes arranged, which cool the sides of the watering coconut.
  • This type of cooling has the following disadvantages.
  • a cooling depending on the casting speed can only be maintained to a certain degree because the formation of vapor bubbles on the cooling surfaces of the mold and the thermal barrier layer which is formed prevent the cooling effect due to the associated poorer thermal conductivity.
  • An increase in the coolant throughput and its impact speed do not significantly improve the cooling.
  • the known technical solutions require increased assembly, disassembly and adjustment effort, e.g. when clogging or clogging of nozzles and their flow control by contaminated coolant.
  • Another disadvantage is that during an accident, if the masking tape cannot prevent the liquid metal from escaping, there is a risk of an explosion due to the coagulation of the coolant with the melt, particularly in the case of side cooling. This can create a particularly dangerous situation for the operating personnel and the system.
  • the coolant speed decreases from the nozzle outlet to the cooling surface.
  • any protruding fastening elements and components of the mold carrier prevent the coolant from coming into uniform contact and have a negative influence on its flow conditions. Due to the formation of vapor bubbles and the associated excretion of lime and other minerals as well as scaling of the surface, there is always one deteriorating cooling behavior. It can therefore be assumed that a desired cooling function over the required cooling zone is not possible in every case. This changes the exact distribution of the cooling zones for internal cooling at the same time.
  • the invention had for its object to provide a cooling device for a casting wheel for the continuous casting of metals or metal alloys, with which it is possible to vary the coolant pressure and thus the coolant speed independently of the coolant pump within relatively wide limits and the coolant under increased pressure to have a uniform effect on the surface of the mold, which is characterized by a simple structural design and can be adapted to existing casting wheels with little effort.
  • the cooling device consists of a cooling wheel, which is arranged within the casting wheel and is acted upon by coolant.
  • the cooling effect can be influenced by the flow rate of the coolant, the speed and the direction of rotation of the cooling wheel.
  • centrifugal forces act during the rotation of the cooling wheel, by means of which the coolant pressure is increased.
  • the boiling point of the coolant is lowered and the formation of vapor bubbles or vapor membranes is thereby reduced or even avoided.
  • the cooling wheel consists of an outer cooling ring and a cooling wheel hub, which is connected to the cooling ring via radially extending connecting pipes.
  • a central hollow shaft is flanged to the cooling wheel hub and is preferably rotatably mounted in the hollow shaft of the casting wheel.
  • a cavity is arranged in the cooling wheel hub and communicates with the interior of the cooling wheel shaft and the connecting pipes.
  • the Kuhlring is located in the immediate vicinity of the ring mold and has an annular channel which is provided with outlet openings directed outwards onto the ring mold. All-round limiting disks are attached to the two rare walls of the cooling ring, which laterally limit the space between the mold and the cooling channel.
  • Guide vanes can also be attached to the outer circumference of the cooling ring, by means of which forced guidance of the cooling agent is ensured directly as far as the surface of the mold to be cooled.
  • the guide vanes also achieve a high speed gradient between the coolant and the mold.
  • outwardly directed elastic guide and guide elements can be arranged on the lateral boundary disks. These can be designed such that they rest on the outer walls of the mold when the mold is at rest.
  • the guiding and guiding elements can either consist of an elastic material or a spring-loaded ring, which can also be positively controlled. Appropriate control of the adjustable guiding and guiding elements, which can also take place automatically, makes it possible to regulate the outflow amounts of the cooling agent and thereby influence the cooling process.
  • the coolant is pumped through the central hollow shaft into the cavity of the cooling wheel hub and from there it goes through the radial connecting pipes into the ring channel of the cooling ring and through the outlet openings on the outer circumference of the cooling sleeve into the space between the cooling wheel and the mold formed by the limiting disks.
  • the limiting disks extend almost to the upper end of the mold and are arranged such that the coolant is guided along the entire inward surface of the mold.
  • the limiting discs simultaneously reduce the flow of coolant (valve function) and increase the effective pressure, which additionally influences the boiling point of the coolant.
  • suitable devices for a targeted flow metering can also be installed in order to enable coolant pressure control in accordance with the solidification requirements of the melt.
  • FIG. 2 shows the front view of the casting wheel according to FIG. 1 with several partial sections
  • FIG. 3 shows a cross section of an embodiment variant of the casting wheel with positively controlled guiding and guiding elements
  • FIG. 4 shows a section of a further embodiment variant of the casting wheel adjustable valves and a throttle for the discharge of the coolant.
  • the casting wheel 10 shown in FIG. 1 consists of a front ring disk 17 and a rear ring disk 2, which is designed as a drive disk and is connected to a hollow shaft 16.
  • the hollow shaft 16 is set in rotation by a drive unit, not shown.
  • the ring mold 1 is fastened, the ring groove 19, into which the molten metal is introduced, can be closed with a cover band 18.
  • the cooling device which is designed as a cooling wheel 11, is arranged within the casting wheel 10.
  • the cooling wheel 11 consists of an outer cooling ring 6, in which an annular channel 12 is arranged, a cooling wheel hub 8 and connecting tubes 7 arranged in a spoke-like manner between the cooling ring 6 and the cooling wheel hub 8.
  • the cooling ring 6 is located in close proximity to the ring mold 1.
  • the ring channel 6 has outlet openings 13 for the cooling water distributed on its outer circumference.
  • the cooling wheel hub 8 has a hollow chamber 14 and is connected to an inner hollow shaft 9 for the cooling water supply.
  • a drive unit not shown, is connected to the inner hollow shaft 9, by means of which the cooling wheel 11 can be set in rotation.
  • Suitable bearings 28 are arranged between the hollow shaft 16 of the casting wheel 10 and the inner hollow shaft 9 of the cooling wheel 11.
  • the cooling water is passed through the cavity 15 of the inner hollow shaft 9 into the hollow chamber 14 of the cooling wheel hub 8 and flows through the connecting tubes 7 into the ring channel 12 and reaches the outer wall 21 of the ring mold 1 via the outlet openings 13.
  • the two outer sides of the cooling ring 6 limiting discs 3 and 4 attached, which rest when the cooling wheel 11 is stationary on the side walls of the ring mold 1 and thus laterally limit the space between the ring mold 1 and the cooling ring 6.
  • the limiting disks 3 and 4 abutting on the side walls of the ring mold 1 are elastic at their free ends, so that cooling water can flow along the side walls of the ring mold 1 with a corresponding rotation of the cooling wheel 11.
  • Guide vanes 5 are attached to the outer circumference of the cooling ring 6, by means of which the cooling water is forced to the surfaces of the ring mold 1 to be cooled.
  • circumferential guide and guide elements 20 are arranged at the free ends of the limiting disks 3 and 4 and are fixed in position by means of springs 25.
  • the guide and guide elements 20 pressed outward, and the coolant flow is guided along the outer wall 21 of the ring mold 1.
  • FIG. 4 shows an embodiment variant in which the ring mold 1 and the ring groove 19 have a U-shaped contour.
  • the limiting disks 3 ', 4' attached to the two outer sides of the cooling ring 6 extend into the upper edge region of the ring mold 1 and do not abut the side walls of the ring mold 1.
  • an annular channel 26 is formed between the outer wall of the ring mold 1 and the inside of the lateral disks 2 and 17 which hold the ring mold 1.
  • the cooling water is thus subjected to positive guidance and reaches the outermost area of the surfaces of the ring mold 1 to be cooled.
  • the cooling effect is further supported by the guide vanes 5 attached to the cooling ring 6, which as a result of the U-shaped ring mold 1 consist of two symmetrical sections 5 'and 5 "are composed.
  • the guide vanes 5 are adapted to the outer contour of the adjacent U-shaped contour of the ring mold 1 and are at a short distance from the outer contour of the ring mold 1.
  • the cooling water located in the ring channel 26 can have two Various duct systems can be selectively discharged to the outside.To this end, drain holes 27, 27 'are arranged in the side windows 2 and 17 of the casting wheel 10 parallel to the hollow shaft of the casting wheel 10, in which passage valves 22 which can be controlled from the outside are installed centrally above the page n disks 2, 17 arranged control disks, which are not shown in Figure 4. When the passage valves 22 are opened, the cooling liquid can flow out through the bores 24, 24 ′ in the valve receiving flanges 29. In addition, in the adjacent areas between the boundary disks 3 ', 4' and the side disks 17, 2, each on the front and on the rear of the casting wheel 10, drain channels 23 and 23 'acting as a throttle are arranged.
  • the two gap-shaped drainage channels 23 and 23 ' are arranged in steps and slightly offset and only ensure the drainage of a small amount of cooling water.
  • the gap-shaped outlet channels 23 and 23 ' are formed by corresponding step-shaped recesses in the boundary plates 3', 4 'and the side windows 2, 17.
  • the speed of the coolant flow can be controlled in a targeted manner by controlling the cooling water outflows by means of the valves 22.
  • This embodiment variant enables very good heat transfer from the surfaces of the ring mold 1 to be cooled to the cooling medium. A considerable amount of heat can be dissipated with high controllable cooling water speeds. Due to the achievable high flow rates, the deposition of components from the Cooling medium greatly reduced or avoided. In the phase of heat transfer, the cooling water is under increased pressure.
  • a self-cleaning effect occurs in the cooling bores or outflow openings of the cooling ring 6 as a result of the variable rotational speed of the cooling wheel and the centrifugal forces generated thereby, thereby preventing these bores from becoming clogged.
  • the cooling wheel can operate within the casting wheel at speeds of up to 150 revolutions / min. are moved, whereby an additional dynamic pressure increase of the cooling medium by up to approx. 5400 Pa can be achieved with an outer diameter of the ring mold of the casting wheel of 1665 mm.
  • the coolant pressure is essentially determined by the dynamic pressure due to the centrifugal forces.
  • the static pressure applied by the feed pump only plays a subordinate role.
  • the cooling device is also suitable for retrofitting in casting wheels that are already in operation.

Landscapes

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

Abstract

L'invention concerne un dispositif de refroidissement pour une roue de coulée utilisée en coulée continue de métaux ou d'alliages métalliques. L'invention vise, sur la base des inconvénients présentés par les dispositifs de refroidissement connus, à mettre au point un dispositif de refroidissement qui permette d'une part de faire varier la pression de l'agent réfrigérant et par conséquent sa vitesse, indépendamment de la pompe à réfrigérant, dans des limites relativement importantes, et d'autre part de laisser agir l'agent réfrigérant uniformément sur la surface de la coquille, à pression élevée. Le dispositif de refroidissement doit en outre être de structure simple et pouvoir être adapté sans grande complexité sur des roues de coulée existantes. A cet effet, il est prévu de monter dans la roue de coulée (10), une roue de refroidissement (11) sollicitée par l'agent réfrigérant. La roue de refroidissement (11) comprend un anneau de refroidissement (6) extérieur, un moyeu de la roue de refroidissement (8) et des tuyaux de jonction (7) entre le moyeu de la roue de refroidissement (8) et l'anneau de refroidissement (6). Ledit anneau de refroidissement (6) est situé au voisinage immédiat de la coquille annulaire (1) et présente un canal annulaire (12) muni d'orifices de sortie (13), dirigés en direction de la coquille annulaire (1). Le canal annulaire (12) est relié à une chambre creuse (14) disposée dans le moyeu de la roue de refroidissement (8) par l'intermédiaire de tuyaux de jonction (7). Sur le moyeu de la roue de refroidissement (8), il est fixé un arbre creux (9) central dont la cavité (15) est en communication avec la chambre creuse (14) du moyeu de la roue de refroidissement (8). L'arbre creux (9) est monté rotatif dans l'arbre creux (16) de la roue de coulée (10).
PCT/DE1997/001522 1996-07-23 1997-07-21 Dispositif de refroidissement pour roue de coulee Ceased WO1998003287A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41983/97A AU4198397A (en) 1996-07-23 1997-07-21 Casting wheel cooling device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19629632.3 1996-07-23
DE1996129632 DE19629632C2 (de) 1996-07-23 1996-07-23 Kühlvorrichtung für ein Gießrad

Publications (1)

Publication Number Publication Date
WO1998003287A1 true WO1998003287A1 (fr) 1998-01-29

Family

ID=7800562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001522 Ceased WO1998003287A1 (fr) 1996-07-23 1997-07-21 Dispositif de refroidissement pour roue de coulee

Country Status (3)

Country Link
AU (1) AU4198397A (fr)
DE (1) DE19629632C2 (fr)
WO (1) WO1998003287A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2528925C1 (ru) * 2013-04-10 2014-09-20 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Машина непрерывного литья с роторным кристаллизатором

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163500B (de) * 1953-07-18 1964-02-20 Ilario Properzi Vorrichtung zum Stranggiessen von Metallen
DE1242804B (de) * 1963-07-13 1967-06-22 Ilario Properzi Giessrad zur fortlaufenden Herstellung von Metallstraengen
DE1783135A1 (de) * 1965-02-12 1972-01-05 Southwire Co Kuehlsystem fuer eine Giessmaschine
US3712366A (en) * 1971-10-12 1973-01-23 Jones & Laughlin Steel Corp Method of cooling drum type strip casting apparatus
DE3801085A1 (de) * 1988-01-16 1989-07-27 Thyssen Stahl Ag Walze zum kontinuierlichen giessen von folien oder duennen baendern, insbesondere aus metall

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD89211A (fr) *
BE542505A (fr) * 1954-11-02
US3318369A (en) * 1964-11-25 1967-05-09 Southwire Co Cooling system for casting wheel
US3464484A (en) * 1967-04-27 1969-09-02 Southwire Co Casting machine with removable casting ring
FR2359663A1 (fr) * 1976-07-27 1978-02-24 Pechiney Aluminium Ruban metallique sans tension et a haute conductibilite thermique pour machine de coulee
IT1126618B (it) * 1979-12-19 1986-05-21 Giulio Properzi Dispositivo di raffreddamento in una macchina di colata continua del tipo a ruota e nastro
FR2481161A1 (fr) * 1980-04-28 1981-10-30 Pechiney Aluminium Procede et dispositif d'obtention en continu de lingots de metaux non ferreux a empilage auto-bloquant a partir d'une ebauche issue d'une machine de coulee sur roue a gorge
WO1984002669A1 (fr) * 1983-01-03 1984-07-19 Southwire Co Systeme de buse de pulverisation a commande individuelle et son procede d'utilisation dans une machine a fondre
DE3411734A1 (de) * 1984-03-30 1985-11-14 Badische Stahlwerke Ag Vorrichtung zum strang-giesswalzen von metallen, insbesondere von stahl
DD271808A3 (de) * 1987-12-24 1989-09-20 Mansfeld Kombinat W Pieck Veb Kuehlsystem fuer ein giessrad
DD276587A3 (de) * 1988-05-27 1990-03-07 Mansfeld Kombinat W Pieck Veb Anstroemflanke einer ringkokille
DE4223853A1 (de) * 1992-07-20 1994-01-27 Gerd Ebert Nähfaden, Verfahren zur Herstellung von aufreißfesten Kettenstichnähten sowie Kettenstichnaht

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163500B (de) * 1953-07-18 1964-02-20 Ilario Properzi Vorrichtung zum Stranggiessen von Metallen
DE1242804B (de) * 1963-07-13 1967-06-22 Ilario Properzi Giessrad zur fortlaufenden Herstellung von Metallstraengen
DE1783135A1 (de) * 1965-02-12 1972-01-05 Southwire Co Kuehlsystem fuer eine Giessmaschine
US3712366A (en) * 1971-10-12 1973-01-23 Jones & Laughlin Steel Corp Method of cooling drum type strip casting apparatus
DE3801085A1 (de) * 1988-01-16 1989-07-27 Thyssen Stahl Ag Walze zum kontinuierlichen giessen von folien oder duennen baendern, insbesondere aus metall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2528925C1 (ru) * 2013-04-10 2014-09-20 Открытое акционерное общество Акционерная холдинговая компания "Всероссийский научно-исследовательский и проектно-конструкторский институт металлургического машиностроения имени академика Целикова" (ОАО АХК "ВНИИМЕТМАШ") Машина непрерывного литья с роторным кристаллизатором

Also Published As

Publication number Publication date
AU4198397A (en) 1998-02-10
DE19629632C2 (de) 1999-01-14
DE19629632A1 (de) 1998-01-29

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