EP0686446B1 - Stranggiesskokille mit verbessertem Wärmeaustausch sowie Verfahren zur Erhöhung des Wärmeaustauschs einer Stranggiesskokille - Google Patents

Stranggiesskokille mit verbessertem Wärmeaustausch sowie Verfahren zur Erhöhung des Wärmeaustauschs einer Stranggiesskokille Download PDF

Info

Publication number
EP0686446B1
EP0686446B1 EP95107851A EP95107851A EP0686446B1 EP 0686446 B1 EP0686446 B1 EP 0686446B1 EP 95107851 A EP95107851 A EP 95107851A EP 95107851 A EP95107851 A EP 95107851A EP 0686446 B1 EP0686446 B1 EP 0686446B1
Authority
EP
European Patent Office
Prior art keywords
crystalliser
cooling fluid
sidewalls
circulation channels
zone
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 - Lifetime
Application number
EP95107851A
Other languages
English (en)
French (fr)
Other versions
EP0686446A1 (de
Inventor
Giampietro Benedetti
Gianni Gensini
Milorad Pavlicevic
Alfredo Poloni
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.)
Danieli and C Officine Meccaniche SpA
Original Assignee
Danieli and C Officine Meccaniche SpA
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
Priority claimed from IT94UD000096 external-priority patent/IT1267249B1/it
Application filed by Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA
Publication of EP0686446A1 publication Critical patent/EP0686446A1/de
Application granted granted Critical
Publication of EP0686446B1 publication Critical patent/EP0686446B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B22D11/055—Cooling the moulds
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould

Definitions

  • This invention concerns a continuous-casting crystalliser with increased heat exchange and also a method to increase the heat exchange in a continuous-casting crystalliser, as set forth in the respective main claims.
  • the invention is employed in association with a mould used in a continuous casting plant for the production of billets, blooms or slabs of any desired type and section.
  • the field of continuous casting still entails a plurality of problems which have not yet been overcome and which are linked to the high temperatures to which the sidewalls of the crystalliser are subjected.
  • the uneven temperature along the sidewalls of the crystalliser causes an uneven deformation of those sidewalls together with their outward displacement in relation to their initial position in the cold state, this deformation being due to the thermal expansion of the material, with resulting problems linked to the surface faults caused by this uneven deformation on the billets/ blooms/slabs being formed.
  • the coefficient of heat exchange between the forming skin and the sidewalls of the crystalliser, at least in the lower zone of the crystalliser, takes on values which are lower than 36000 W/m 2 K and which are therefore not acceptable for an efficient action of cooling and therefore of solidification of the skin being formed.
  • the heat exchange has acceptable values only along the first segment of the crystalliser, which extends along about a quarter of the length of a crystalliser and normally about 200 mm. below the meniscus; in this first segment the skin of the billet/bloom/slab is substantially in contact with the sidewalls of the crystalliser.
  • the skin of the billet or bloom at the corners is less thick than along the sidewalls of the billet or bloom, and gradients of temperature between the corners and the sides of the billet or bloom are created.
  • the purpose of this invention is to obtain a crystalliser for the continuous casting of billets/blooms/slabs which enables the extraction speed to be increased owing to an increased heat exchange between the sidewalls of the crystalliser and the cooling fluid.
  • a further purpose is to provide a crystalliser in which the thermal deformation of that crystalliser is reduced to a minimum.
  • Yet another purpose is to provide a method which enables the heat exchange to be increased between the sidewalls of the crystalliser and the skin being formed in a continuous-casting crystalliser.
  • the crystalliser according to the invention has sidewalls of a reduced thickness, between 4 and 15 mm., but advantageously between 4 and 10 mm., which enable their behaviour to be made resilient.
  • the sidewalls of the crystalliser cooperate externally with cooling chambers, which contain a specific intermediate wall for each sidewall of the crystalliser for the purpose of defining together with that sidewall a circulation channel for the cooling fluid.
  • the circulation channels have, perpendicular to the axis of the crystalliser, a section having a transverse length shorter than the sidewalls of the crystalliser and a transverse width, or span, of the passage for the cooling fluid having a maximum value of 3 millimetres.
  • the scope of the invention comprises the correlation of the pressure or range of pressures of the cooling fluid circulating in the relative circulation channels with the value of the coefficient of heat exchange to be achieved between the sidewalls of the crystalliser and the cooling fluid.
  • the invention arranges that by acting on the pressure of the cooling fluid it is possible to deform the sidewalls of the crystalliser in the desired zones in the desired manner.
  • cooling fluid is meant water for industrial use, at any rate water which is normally used in moulds to cool the crystalliser.
  • the invention arranges to employ as a cooling fluid water to which has been added substances which enable that water to be used even at temperatures of entry into the mould lower than "0" and down to -25°C/-30°C.
  • a variant of the invention arranges for the use, as a cooling fluid, of other liquid substances such as glycol, for instance, at a temperature between -10°C/-15°C and -70°C/-80°C upon entry into the mould.
  • a further variant of the invention covers the use, as a cooling fluid, of liquefied gases, whether pure or combined with other gases or liquids, at a temperature between -3°C and -270°C upon entry into the mould.
  • cooling fluid consisting of one of the various types of water, also called normal water, as normally used to cool continuous casting moulds in an industrial process.
  • the cooling fluid can flow in the same direction as, or in the opposite direction to, the direction of feed of the billet/bloom within the casting chamber.
  • the crystalliser according to the invention therefore makes possible an increase of the casting speed, with a resulting increase of the output of the plant.
  • the circulation channels do not affect the corner zones of the crystalliser so as to prevent causing an excessive cooling of the corners of the billet/bloom/slab being formed in cooperation with those corner zones.
  • the crystalliser according to the invention includes at the corners stiffening elements suitable at least to control the deformations of the crystalliser caused by the thermal expansion as a result of the heating of the crystalliser.
  • stiffening elements are wholly or partially embodied directly in the crystalliser itself or are auxiliary external elements which are secured to, or are caused to cooperate with, the corners of the crystalliser.
  • the stiffening elements may be in contact with the corners of the crystalliser so as to determine a no transit area therefore not lapped by the circulation of the cooling fluid.
  • a passage is included between the stiffening elements and the corners of the crystalliser so as to permit the passage of the cooling fluid in a smaller quantity than at the remaining parts of the sidewalls of the crystalliser.
  • stiffening elements determine at the corners a particular geometry suitable to increase the turbulence of the cooling fluid and to optimise the alignment of the crystalliser.
  • the cross-section of the passage of the cooling fluid is reduced in such as way as to leave a transverse width, or span, between 1.5 and 2.5 millimetres for instance, such as will create a required turbulence and stirring in cooperation with the induced differences of pressure.
  • At least part of at least one face of each circulation channel includes means to disturb the flow of cooling fluid, these disturbing means being suitable to break up the fluid streams and to maintain a condition of great turbulence.
  • At least part of the outer surface of the sidewalls of the crystalliser in contact with the cooling fluid cooperates by means of its own flow disturbing means which, by breaking up the fluid streams of the outermost layer running against the sidewalls of the crystalliser, cause the cooling fluid to run in a turbulent manner with a resulting increase of heat exchange.
  • the disturbing means can be embodied by means of rough areas, hollows or ridges provided on the outer surface of the sidewalls of the crystalliser and/or on the inner surface of the intermediate walls.
  • These hollows may be substantially horizontal or inclined in relation to the direction of flow of the cooling fluid, depending on the effect to be achieved.
  • the hollows can have a development parallel or not parallel to each other.
  • At least part of the inner surface of the intermediate walls facing the crystalliser and defining the circulation channels contains alternate narrowings and enlargements, which compel the cooling fluid to carry on a turbulent and swirling motion that assists in breaking up the fluid streams of the outermost layer of the fluid and improves the heat exchange with the sidewalls of the crystalliser.
  • the rough surface areas can be produced by sanding, shot-blasting or an analogous treatment applied to the inner surface of the intermediate walls and/or to the outer surface of the sidewalls of the crystalliser.
  • the intermediate walls in the circulation channels are movable perpendicularly to the sidewalls of the crystalliser and cooperate with adjustment means for their approach to, or distancing from the sidewalls of the crystalliser so as to alter the transverse width or span of the circulation channels and therefore the cross-section of the passage for the cooling fluid when that fluid cooperates directly with the outer surface of the sidewalls of the crystalliser.
  • the pressure of the cooling fluid is between 5 and 20 bar at least at the inlet of the circulation channel at the lower zone of the crystalliser, where the forming skin is detached from the sidewalls of the crystalliser, whereas in the segment of the circulation channel in the upper zone of the crystalliser the pressure is between about 3 and 15 bar.
  • the reference number 10 in the attached figures denotes generally a mould according to the invention, with which a nozzle 25 to discharge molten metal is caused to cooperate.
  • the mould 10 can have a square, rectangular or polygonal cross-section or any desired cross-section.
  • the mould 10 according to the invention comprises a crystalliser 11 the sidewalls of which have a thickness between 4 and 15 mm., but advantageously between 4 and 10 mm.
  • the thickness of the sidewalls is always correlated with the range of pressures of the cooling fluid which are used to obtain a substantially resilient behaviour.
  • the crystalliser 11 comprises substantially an upper zone 34, which corresponds to the vicinity of the meniscus 33 and to the zone therebelow as far as the skin being formed of the bloom/billet/slab 24 is supported substantially against the inner surfaces of the crystalliser 11.
  • the cooling fluid when it is normal water, has a pressure between 3 and 15 bar in the upper zone 34.
  • the crystalliser 11 includes therebelow a lower zone 26, which begins substantially in the vicinity of the point where the forming skin of the bloom/billet/slab 24 being extracted begins to be separated from the inner surfaces of the crystalliser 11 and extends to the end of the crystalliser 11.
  • the mould 10 comprises containing walls 13 positioned outside the crystalliser 11 and defining therewith one or more cooling chambers 14 in which a cooling fluid under pressure is caused to run.
  • the cooling fluid can be caused to run in the opposite direction to, or in the same direction as, the direction of feed of the billet/bloom/slab 24 being formed.
  • the cooling chambers 14 include a feeder conduit 22a equipped with an adjustment valve 23a and a discharge conduit 22b also equipped with an adjustment valve 23b.
  • these cooling chambers 14 contain, for each side of the crystalliser 11, specific intermediate walls 20, which in the example of Fig.1 are movable transversely according to the arrows 17.
  • These intermediate walls 20 may also contain holes, which have the purpose of controlling the pressure of the cooling fluid in circulation channels 21.
  • the circulation channels 21 are included, at least one per each side of the crystalliser 11, between the intermediate walls 20 and the outer surface 12 of the sidewalls of the crystalliser 11.
  • the crystalliser 11 being heated by the effect of the liquid metal running within the casting chamber 31, is outwardly deformed resiliently, and the pressure of the cooling fluid acts to compensate this deformation by displacing the sidewalls of the crystalliser 11 inwards.
  • the crystalliser 11 has a rectangular cross-section
  • at least its wider sidewalls face independent cooling chambers 14 and circulation channels 21 having independent pressures and differences of pressures of the cooling fluid.
  • the circulation channels 21 do not cooperate directly with the corners 15 of the crystalliser 11, which are not cooled by the cooling fluid running within the cooling chambers 14.
  • a segment of an increased thickness 32 is included at the corners 15 of the crystalliser 11 so as to reduce the heat exchange with the cooling fluid.
  • the circulation channels 21 cooperate with those segments 32 of an increased thickness included directly in the sidewalls of the crystalliser 11 so as to provide cooling also at the corners 15, but a cooling less intense than at the remaining parts of the sidewalls of the crystalliser 11.
  • an auxiliary stiffening and/or alignment element 16 is included and cooperates with the corner 15b and defines therewith a channel 21 of reduced dimensions for circulation of the cooling fluid.
  • the auxiliary stiffening and/or alignment element 16 defines with that corner 15c a geometry suitable to increase the turbulence of the circulating cooling fluid and to facilitate the alignment of the crystalliser 11.
  • the circulation channels 21 have at their lateral ends inclined walls 30 having an inclination which can be varied as required so as to modulate and graduate the heat exchange at the corners 15 of the crystalliser 11.
  • the segment 32 of an increased thickness can be embodied by means of stiffening and/or alignment elements 16 obtained wholly (16a - Fig.6c) or partly (116a - Figs.6b and 6d) directly from the sidewalls of the crystalliser 11 or may consist of independent stiffening elements 16b (Figs.6a, 6e and 6f).
  • the stiffening and/or alignment elements 16, may also consist of a plurality of pieces.
  • the independent stiffening and/or alignment elements 16b can be associated with or rigidly connected to, by brazing for instance, the corners 15 of the crystalliser 11 according to the invention.
  • the stiffening and/or alignment elements 16a-116a provided in the sidewall of the crystalliser 11 can be conformed as a solid polygon or have a T-shape or another form.
  • stiffening and/or alignment elements 16b are independent, they can be conformed as a "T” , or an "L” or an “ ⁇ ” or can have other forms.
  • the stiffening and/or alignment element which in Fig.6d is provided (116a) from the sidewall of the crystalliser 11, whereas in Fig.6f it is an independent element 16b, is T-shaped and is inserted in a space 29 defined in the segment 32 of an increased thickness.
  • the cooling fluid may or may not run through the space 29.
  • the stiffening and/or alignment elements 16 perform the triple task of stiffening and of clamping the deformations of the crystalliser 11, of reducing the heat exchange at the corners 15 of the crystalliser 11 and of aligning the crystalliser 11.
  • the walls of the circulation channel 21 include disturbing elements 18 to increase the heat exchange between the cooling fluid and the crystalliser 11 in relation to the increase of heat flux to be removed which arises from elimination of the air interspaces between the sidewalls of the crystalliser 11 and the skin.
  • the disturbing elements 18 can be embodied with rough areas or hollows made in the outer surface 12 of the sidewalls of the crystalliser 11 and/or with rough areas or hollows made in the inner surface of the intermediate walls 20.
  • the disturbing elements 18 contain a plurality of hollows 19 into which the cooling fluid penetrates and causes the breaking up of the outermost layer of the cooling fluid running against the outer surface 12 of the sidewalls of the crystalliser 11.
  • These hollows 19 may have a substantially horizontal or an inclined development (Fig.3).
  • the hollows 19 are defined by a height and by a depth "a" of ⁇ 0.5 mm. and by a distance of ⁇ 5 mm. between one hollow and another.
  • the intermediate walls 20 have, on their inner surface facing the sidewalls of the crystalliser 11, disturbing elements 18 comprising alternate enlargements 27 and narrowings 28 for the purpose of causing in the circulating cooling fluid a required turbulence
  • These enlargements 27 and narrowings 28 may have a polygonal development (Fig.2b) or may have a development producing a Venturi effect (Fig.2a), which makes the motion of the cooling fluid swirling and turbulent and thus enhances the heat exchange.
  • these rough surface areas on the outer surface 12 of the sidewalls of the crystalliser 11 and/or on the inner surface of the intermediate walls 20 are obtained by a treatment of sanding, shot-blasting or an analogous treatment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Claims (19)

  1. Verfahren zum Verstärken des Wärmeübergangs beim Kühlen und bei der Wärmeableitung von wenigstens einer Seitenwand eines Kristallisators (11) einer Form (10), die beim Stranggießen von Strängen, Blöcken oder Brammen (24) eingesetzt wird, wobei der Kristallisator (11) außen mit einer kastenförmigen Struktur (13) zusammenwirkt, die Kühlkammern (14) bildet, in denen ein Kühlfluid zirkuliert, und innen mit der Gußhaut der Stränge/Blöcke oder Brammen (24), die hergestellt werden, die Kühlkammern (14), Zwischenwände (20) umfassen, die mit der Außenfläche (12) der Seitenwände (12) des Kristallisators (11) zusammenwirkend Zirkulationskanäle (21) bilden, wobei der Kristallisator (11) wenigstens einen oberen Bereich (34) in Längsrichtung umfaßt, der wenigstens den Meniskus (33) des flüssigen Metalls und den Abschnitt unterhalb des Meniskus (33) umfaßt, und einen unteren Bereich (26) in Längsrichtung, der in der Nähe des Bereichs der Trennung der entstehenden Gußhaut von den Innenflächen des Kristallisators (11) beginnt und sich auf den Auslaß des Kristallisators (11) zu erstreckt, wobei das Verfahren durch die folgenden Schritte gekennzeichnet ist:
    Einwirken auf den Querschnitt und/oder Anpassung wenigstens eines Längsabschnitts wenigstens einer Seite des Querschnitts der Zirkulationskanäle (21); und
    Einwirken auf die verschiedenen Drücke des Kühlfluids zwischen dem Einlaß und dem Auslaß des Längsabschnitts der Zirkulationskanäle (21), um eine gewünschte Turbulenz des Kühlfluids zu erzeugen, wobei durch die Turbulenz der Wärmeübergangskoeffizient auf einen Wert über 40000 W/m2 K erhöht wird.
  2. Verfahren nach Anspruch 1, wobei der Druck des Kühlfluids am Einlaß der Zirkulationskanäle (21) zwischen 5 und 20 bar liegt.
  3. Verfahren nach Anspruch 1 oder 2, wobei der Druck des Kühlfluids im oberen Bereich (34) zwischen 3 und 15 bar liegt.
  4. Verfahren nach einem der vorangehenden Ansprüche, wobei der Druck des Kühlfluids in Abhängigkeit von der Dicke wenigstens eines Teils des unteren Bereiches (26) der Seitenwände (12) variiert, so daß sich die Seitenwände (12) durch den Druck elastisch verformen können, bis die Seitenwände (12) eine Position nah an der Gußhaut der sich verfestigenden Stränge, Blöcke oder Brammen (24) oder in Kontakt damit einnehmen.
  5. Verfahren nach einem der vorangehenden Ansprüche, wobei der durchschnittliche Wärmestrom, der in dem unteren Bereich (26) des Kristallisators (11) abgeführt wird, mehr als 2,5 MW/m2 beträgt.
  6. Verfahren nach einem der Ansprüche 1 bis einschließlich 5, wobei das Kühlfluid aus Wasser besteht.
  7. Verfahren nach einem der Ansprüche 1 bis einschließlich 5, wobei das Kühlfluid aus Wasser besteht, das Zusätze bei einer Temperatur bis -30°C enthält.
  8. Verfahren nach einem der Ansprüche 1 bis einschließlich 5, wobei das Kühlfluid aus Glykol oder einer anderen vergleichbaren Substanz bei einer Temperatur zwischen -10°C und -80°C besteht.
  9. Verfahren nach einem der Ansprüche 1 bis einschließlich 5, wobei das Kühlfluid aus reinem Flüssiggas oder Flüssiggas, dem ein anderes Gas oder eine andere Flüssigkeit zugesetzt worden ist, bei einer Temperatur zwischen -3°C und -270°C besteht.
  10. Kristallisator einer Form (10) für das Stranggießen von Strängen, Blöcken oder Brammen (24), der eine Vielzahl von Seitenwänden (12) umfaßt, die außen mit einer kastenförmigen Struktur (13) zusammenwirken, die Kühlkammern (14) bildet, in denen Kühlfluid zirkuliert, und innen mit der Gußhaut der Stränge, Blöcke oder Brammen (24), die hergestellt werden, wobei die Kühlkammern (14) Zwischenwände (20) enthalten, die mit den Außenflächen der Seitenwände (12) zusammenwirkend Zirkulationskanäle (21) bilden, und des weiteren wenigstens einen oberen Bereich (34) in Längsrichtung umfaßt, der wenigstens den Meniskus (33) des flüssigen Metalls und den Abschnitt unmittelbar unterhalb des Meniskus (33) einschließt, sowie einen unteren Bereich (26) in Längsrichtung, der in der Nähe des Bereiches der Trennung der entstehenden Gußhaut von der Innenfläche der Seitenwände (12) beginnt und sich auf den Auslaß des Kristallisators (11) zu erstreckt, wobei der Kristallisator (11) dadurch gekennzeichnet ist, daß das Verfahren nach einem der vorangehenden Ansprüche eingesetzt wird, daß die Seitenwände (12) eine Dicke zwischen 4 und 15 mm haben und daß wenigstens ein Teil wenigstens einer der Wände der Zirkulationskanäle (21) Elemente (18) enthält, die den Strom des Kühlfluids hemmen.
  11. Kristallisator nach Anspruch 10, wobei wenigstens ein Teil der Außenflächen (12) der Seitenwände des Kristallisators (11) in Kontakt mit dem Kühlfluid eine Vielzahl von Hohlräumen (19) enthält, die senkrecht oder geneigt zur Transportrichtung des Kühlfluids sind, und die eine Höhe sowie eine Tiefe
    Figure 00240001
    a" ≤ 0,5 mm haben und um einen Abstand b" ≥ 5 mm voneinander entfernt sind.
  12. Kristallisator nach Anspruch 10 oder 11, wobei die Hemmelemente (18) in die Innenfläche der Zwischenwände (20) dem Kristallisator (11) zugewandt integriert sind und abwechselnde Aufweitungen (27) und Verengungen (28) umfassen.
  13. Kristallisator nach einem der Ansprüche 10 bis einschließlich 12, wobei die Innenfläche der Zwischenwände (20) und/oder die Außenfläche (12) der Seitenwände des Kristallisators (11) rauhe Oberflächenbereiche einschließen, die durch eine Behandlung mittels Schleifen, Kugelstrahlen oder dergleichen hergestellt wurden.
  14. Kristallisator nach einem der Ansprüche 10 bis einschließlich 13, wobei die Quer- bzw. Spannbreite des Durchlasses der Zirkulationskanäle (21) maximal 3 mm beträgt.
  15. Kristallisator nach einem der Ansprüche 10 bis einschließlich 14, wobei die Form der Zirkulationskanäle (21) im Querschnitt wenigstens an den Ecken (15) des Kristallisators (11) variiert werden kann.
  16. Kristallisator nach einem der Ansprüche 10 bis einschließlich 15, der Versteifungs- und/oder Ausrichtelemente (16) enthält, die mit den Ecken (15) des Kritallisators (11) verbunden sind.
  17. Kristallisator nach einem der Ansprüche 10 bis einschließlich 16, wobei die Versteifungs- und/oder Ausrichtelemente (16a - 116a) direkt von den Seitenwänden des Kristallisators (11) her ausgebildet sind.
  18. Kristallisator nach einem der Ansprüche 10 bis einschließlich 17, wobei die Versteifungs- und/oder Ausrichtelemente (16b) zusätzliche äußere Elemente sind, die mit den Ecken (15) des Kristallisators (11) Zusammenwirken.
  19. Kristallisator nach einem der Ansprüche 10 bis einschließlich 18, wobei wenigstens ein Teil der Zwischenwände (20) je nach Erfordernis in bezug auf die Seitenwände des Kristallisators (11) bewegt werden kann.
EP95107851A 1994-06-06 1995-05-23 Stranggiesskokille mit verbessertem Wärmeaustausch sowie Verfahren zur Erhöhung des Wärmeaustauschs einer Stranggiesskokille Expired - Lifetime EP0686446B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITUD940096 1994-06-06
IT94UD000096 IT1267249B1 (it) 1994-06-06 1994-06-06 Cristallizzatore a pareti sottili
ITUS950014 1995-02-06
ITUS950014 1995-02-06

Publications (2)

Publication Number Publication Date
EP0686446A1 EP0686446A1 (de) 1995-12-13
EP0686446B1 true EP0686446B1 (de) 2000-08-16

Family

ID=26332512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107851A Expired - Lifetime EP0686446B1 (de) 1994-06-06 1995-05-23 Stranggiesskokille mit verbessertem Wärmeaustausch sowie Verfahren zur Erhöhung des Wärmeaustauschs einer Stranggiesskokille

Country Status (3)

Country Link
EP (1) EP0686446B1 (de)
AT (1) ATE195450T1 (de)
ES (1) ES2148375T3 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522448A (en) * 1994-09-27 1996-06-04 Aluminum Company Of America Cooling insert for casting mold and associated method
AUPN872596A0 (en) * 1996-03-19 1996-04-18 Bhp Steel (Jla) Pty Limited Strip casting
IT1310518B1 (it) * 1999-01-13 2002-02-18 Danieli Off Mecc Dispositivo per colata continua ad alta velocita' e relativoprocedimento
IT1310517B1 (it) 1999-01-13 2002-02-18 Danieli Off Mecc Cristallizzatore per colata continua
DE102007002405A1 (de) 2007-01-17 2008-07-24 Sms Demag Ag Stranggießkokille mit Kühlmittelkanal
JP5896811B2 (ja) * 2012-04-02 2016-03-30 株式会社神戸製鋼所 チタンまたはチタン合金からなる鋳塊の連続鋳造用の鋳型およびこれを備えた連続鋳造装置
ITUD20130053A1 (it) * 2013-04-23 2014-10-24 Danieli Off Mecc Apparato per la colata continua
CN104624990B (zh) * 2015-02-26 2023-08-25 周嘉平 一种均匀冷却结晶器铜管及其制造方法
CN112427618B (zh) * 2020-11-23 2022-01-11 宁波欣昊机械有限公司 一种具有加热机构的压铸模具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686445A1 (de) * 1994-06-06 1995-12-13 DANIELI & C. OFFICINE MECCANICHE S.p.A. Verfahren zur Verformung von Seitenwänden einer Kokille sowie Stranggiesskokille

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520352A (en) * 1967-10-19 1970-07-14 Koppers Co Inc Continuous casting mold having insulated portions
AT281330B (de) * 1968-06-05 1970-05-11 Wiener Schwachstromwerke Gmbh Vorrichtung zum Stranggießen mit einer die Durchlaufkokille umgebenden Kühlvorrichtung
DE2106634A1 (en) * 1971-02-12 1972-08-24 Mitsubishi Kinzoku Kogyo K.K., Tokio Graphite wall continuous casting mould - with a metal skin
CH558687A (de) * 1973-03-30 1975-02-14 Concast Ag Verfahren zum steuern der kuehlleistung von schmalseitenwaenden bei plattenkokillen beim stranggiessen und plattenkokille zur durchfuehrung des verfahrens.
AT359225B (de) * 1978-03-23 1980-10-27 Voest Alpine Ag Drehfeld-stranggiesskokille
JPS6057935B2 (ja) * 1982-08-20 1985-12-17 川崎製鉄株式会社 連続鋳造用鋳型
DE3423475C2 (de) * 1984-06-26 1986-07-17 Mannesmann AG, 4000 Düsseldorf Verfahren und Einrichtung zum Stranggießen von flüssigen Metallen, insbesondere von flüssigem Stahl
FR2661120B3 (fr) * 1990-04-20 1992-04-03 Siderurgie Fse Inst Rech Lingotiere de coulee continue de metal liquide equipee de moyens de controle de la solidification du metal liquide.
DE4127333C2 (de) * 1991-08-19 2000-02-24 Schloemann Siemag Ag Stahlstranggießkokille

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686445A1 (de) * 1994-06-06 1995-12-13 DANIELI & C. OFFICINE MECCANICHE S.p.A. Verfahren zur Verformung von Seitenwänden einer Kokille sowie Stranggiesskokille

Also Published As

Publication number Publication date
ES2148375T3 (es) 2000-10-16
EP0686446A1 (de) 1995-12-13
ATE195450T1 (de) 2000-09-15

Similar Documents

Publication Publication Date Title
EP0686445B1 (de) Verfahren zum Kontrollieren der Verformung von Seitenwänden einer Kokille sowie Stranggiesskokille
US5611390A (en) Continuous-casting crystalliser with increased heat exchange and method to increase the heat exchange in a continuous-casting crystalliser
EP0686446B1 (de) Stranggiesskokille mit verbessertem Wärmeaustausch sowie Verfahren zur Erhöhung des Wärmeaustauschs einer Stranggiesskokille
CA1291858C (en) Continuous casting mold and method
US6367539B1 (en) Crystalliser for continuous casting
AU757475B2 (en) High speed continuous casting device and relative method
CA2483784A1 (en) Adjustment of heat transfer in continuous casting molds, especially in the meniscus region
US4911226A (en) Method and apparatus for continuously casting strip steel
EP0909597A1 (de) Kokille zum Stanggiessen von dünnen Brammen
EP1345720B1 (de) Verfahren zur optimierung der kühlung in stranggiesskokillen
US5348075A (en) The manufacture of thin metal slab
EP0686444B1 (de) Stromabwärts liegendes Teil einer Stranggiesskokille mit dünnen Seitenwänden
RU2211743C2 (ru) Многоугольная литейная форма для непрерывного литья металлургического изделия через прибыльную надставку
SU1002086A1 (ru) Кристаллизатор дл установок непрерывной разливки металлов
WO1994007628A1 (en) Continuous casting mould
CA1047731A (en) Molds for continuous casting
ITUD950014A1 (it) Cristallizzatore a scambio termico aumentato per colata continua
JPH03142046A (ja) 連続鋳造方法
JPH01150451A (ja) 双方向引抜型水平連鋳機用タンデイッシュ
KR20020034333A (ko) 오스테나이트계 스테인레스강의 연속주조방법
JPH0636971B2 (ja) ツインベルト方式の連続鋳造装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19960606

17Q First examination report despatched

Effective date: 19980622

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 195450

Country of ref document: AT

Date of ref document: 20000915

Kind code of ref document: T

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 69518360

Country of ref document: DE

Date of ref document: 20000921

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2148375

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010523

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010523

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010524

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010524

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010531

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: DANIELI & C. OFFICINE MECCANICHE S.P.A.

Effective date: 20010531

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010523

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020301

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050523