EP2739416A1 - Procédé de coulée-laminage comportant un refroidissement cryogénique des cylindres de coulée - Google Patents

Procédé de coulée-laminage comportant un refroidissement cryogénique des cylindres de coulée

Info

Publication number
EP2739416A1
EP2739416A1 EP12740923.3A EP12740923A EP2739416A1 EP 2739416 A1 EP2739416 A1 EP 2739416A1 EP 12740923 A EP12740923 A EP 12740923A EP 2739416 A1 EP2739416 A1 EP 2739416A1
Authority
EP
European Patent Office
Prior art keywords
casting
roll
coolant
casting roll
cooling medium
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.)
Granted
Application number
EP12740923.3A
Other languages
German (de)
English (en)
Other versions
EP2739416B1 (fr
Inventor
Johannes Dagner
Thomas Matschullat
Günther Winter
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.)
Primetals Technologies Germany GmbH
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP12740923.3A priority Critical patent/EP2739416B1/fr
Publication of EP2739416A1 publication Critical patent/EP2739416A1/fr
Application granted granted Critical
Publication of EP2739416B1 publication Critical patent/EP2739416B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • 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
    • B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
    • 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

  • the present invention relates to a cast roll rolling method
  • a liquid cooling medium is applied to the surface of the first casting roll via a first cooling device by means of a number of first coolant application devices
  • cooling medium is supplied to the first coolant application devices via first coolant lines
  • cooling medium is inert with respect to the molten metal, has a standard boiling point below normal at atmospheric pressure of less than 20 ° C, in particular below -20 ° C, and has an operating temperature which is at an operating boiling point or lower where ⁇ is related at the operating boiling point to an operating pressure with which the cooling medium is applied.
  • JP 58 097 467 A referenced In the casting of metals close to the final dimensions with a horizontal or vertical one or two-roll casting machine or a strip casting plant with casting thicknesses of less than 15 mm, the shaping of the metal strand following casting is only possible to a limited extent in influencing the profile and flatness of the final product. For this
  • the cast metal strand already in the casting process a suitable thickness profile or a suitable memorize the thickness of the contours and to avoid a thickness wedge as much as possible.
  • the contour of the casting roll in the casting gap is influenced by the thermal expansion and thus in turn by the local heat flow.
  • the heat flow across the casting roll surface is determined, on the one hand, by the heat transfer coefficient from the melt to the casting roll and, to an even greater extent, by the heat transfer coefficient from the solidified strand shell to the casting roll. Furthermore, the temperature difference between casting roll and strand shell or molten bath is crucial for the heat flow.
  • the temperature of the casting roll is übli ⁇ chy in the prior art by an internal cooling - optionally supplemented by an external cooling - set.
  • the contact time is determined by the Ro ⁇ tations economically the casting roll, the G confusewalzengeometrie and the meniscus. In a quiet Schmelzbadoberflä ⁇ che the contact time is to a first approximation constant across the width of the cast strand.
  • the heat flow remains as a possible manipulated variable in order to influence the strand shell thickness and the roll geometry over the strand width . It is already known to vary the heat flow over the strand width characterized in that the heat transfer coefficient Zvi ⁇ rule is affected the liquid metal or the strand shell and the casting roll.
  • the addition of a gas with high thermal conductivity can be carried out in segments.
  • gas mixtures can be used such as argon or nitrogen, yaw ⁇ chemically rea of the components with the band shell.
  • the addition device for the corresponding gas in the local vicinity of the triple point of the melt, roll and the gas space must be arranged to ge ⁇ aims to be able to bring forming strip skin and the casting ⁇ roller between which the gas.
  • the space is very limited due to the arrangement of tundishes, melt distributors and sensors. This makes the construction and integration complex, in some cases even impossible.
  • the object of the present invention is to provide a G manuwalzclar by means of which a reliable and reliable cooling of the first casting roll can be achieved in a simple and efficient manner.
  • the object is achieved by a casting rolling process with the features of claim 1.
  • the mold region at a second side of a second about a second horizontal axis of rotation ro ⁇ animal second casting roll forming is limited.
  • the first and the second casting roll form a casting gap between them.
  • the metal strand is discharged downwards out of the mold area.
  • an angle of the casting gap of Kokillen Kunststoffs to a Trobringort on which the liquid cooling medium is applied to the surface of the first casting roll ⁇ preferably between 60 ° and 180 °, in particular between 90 ° and 180 °.
  • the first coolant application devices below the first casting roll are angeord ⁇ net in a region extending in the horizontal direction over the diameter of the first casting roll and seen in the vertical ⁇ direction below the lowest point of the first Casting roller is located.
  • the first coolant lines are covered with a thermal insulation. This also achieves thermal protection from the ambient temperature. This protection is all the more important, the lower the boiling point of the cooling medium and the longer it takes the transport of the cooling medium from a reservoir to the firstdeffenetzbring Anlagenen.
  • gas separators are arranged in the first coolant lines.
  • the cooling medium in the refrigerant lines in the area of the gas separator to the cooling agent applying means - especially in the gas separators downstream valves - is entirely in liquid form and does not form gas bubbles.
  • controllable valves are also arranged in the first coolant lines.
  • the valves are preferably designed as switching valves. With this configuration, a defined coolant flow is adjustable in a particularly simple manner.
  • the first coolant application devices can be distributed over the width of the casting roll.
  • the coolant application devices can in particular be activated individually or in groups.
  • the cooling medium may in particular be liquid nitrogen, a liquid noble gas - in particular argon - or an organic refrigerant.
  • a casting rolling device has a mold area 1.
  • the mold region 1 is bounded on one side by a first casting roll 2.
  • the first casting roll 2 ro ⁇ advantage in the operation of G manwalzvorraum about a first Rota ⁇ tion axis 3.
  • the rotation axis 3' to the first axis of rotation 3 of the first casting roll 2 is parallel.
  • the second casting roll 2 ' rotates in the opposite direction to the first operation ⁇ casting roll. 2
  • a molten metal 4 is poured.
  • the molten metal 4 solidifies at the edges - in particular on the lateral surfaces of the casting rolls 2, 2 '.
  • the casting rolls 2, 2 ' rotate from above into the mold region 1.
  • the mass produced by solidification of the molten metal 4 is tallstrang 4 'discharged from the mold area 1.
  • the metal can be determined as needed. For example, it may be steel, aluminum, copper, brass, magnesium, etc.
  • the casting rolls 2, 2 'must be cooled. The cooling is often effected by coolant lines which run in the interior of the casting rolls 2, 2 '(internal cooling). The coolant used for this internal cooling is usually water.
  • the nere in ⁇ cooling is not shown in the present invention, of secondary importance, and therefore in FIG.
  • the Gellowalzvorraum possibly for each casting roll 2, 2 '- ei ⁇ ne cooling device 5, 5'.
  • the cooling devices 5, 5 'e ach have a number of coolant application devices 6, 6' (in each case at least one).
  • the liquid cooling medium 7 is applied from the outside to the surface of the respective casting roll 2, 2'.
  • Thedeffenaufbring spuren 6, 6 ' may be formed as needed.
  • they may be formed as conventional spray nozzles ⁇ , for example, as flat-jet nozzles, as a conical nozzle or a spot nozzles.
  • the cooling medium 7 is supplied to the coolant application devices 6, 6 'via corresponding coolant lines 8, 8' from a reservoir 7 "(see also FIG. 2) .
  • a pump 1 ' can be present, but is not absolutely necessary.
  • the cooling medium 7 is located in the coolant lines 8, 8 'and / or in the reservoir 7 "under an operating pressure p.
  • the operating pressure p may be equal to the air pressure Alternatively, the operating pressure p may be greater than the air pressure, for example up to 50 bar. He usually lies between 10 bar and 30 bar.
  • the cooling medium 7 is chosen such that it has the following properties:
  • Boiling point of the cooling medium is 7 or less. Loading ⁇ drive boiling point is related to the operating pressure p, at which the cooling medium 7 is.
  • suitable cooling media 7 are liquid nitrogen, a liquid noble gas (for example argon) and organic refrigerants. Also mixtures of such substances can be used.
  • nitrogen has a standard boiling point of -195.8 ° C.
  • the operating temperature may be -190 ° C at an operating pressure p of about 20 bar.
  • Argon has a standard boiling point of -185.8 ° C. Its operating temperature may be, for example, at -180 ° C, at an operating pressure p of about 20 bar.
  • Suitable organic refrigerants are, in particular, fluorinated hydrocarbons.
  • a typical example is the refrigerant R134a (1, 1, 1, 2-tetrafluoroethane).
  • This Käl ⁇ agent has a standard boiling point of -26 ° C.
  • Be ⁇ ne operating temperature is preferably below -30 ° C, but above -100 ° C, preferably above -80 ° C.
  • the first rotation ⁇ axis 3 is oriented horizontally.
  • the second rotation axis 3 ' is located generally at the same height as the ers ⁇ te rotation axis 3, so that the two axes of rotation 3, 3' in a common horizontal plane.
  • Level is the smallest distance between the two casting rolls ⁇ zen 2, 2 'from each other (pouring gap 9).
  • the metal strand 4 ' is as shown in FIG 2 further down from the mold area 1 discharged.
  • the Auf ⁇ bring location is the one place where the cooling medium 7 is applied to the surface of the first casting roll 2.
  • a win ⁇ angle which is based on the first axis of rotation 3, starting from the casting gap 9, measured in the direction of rotation of the first casting roll 2 and extends to the application, for example, zwislchen 60 ° and 240 °. In the re ⁇ gel, the angle is between 90 ° and 180 °.
  • the cooling agent applying means 6 for the first casting roll 2 can besides or - 2, and preferably according to the invention as shown in FIG - be angeord ⁇ net under the first casting roll. 2
  • the area "under" the first casting roll 2 extends horizontally over the entire diameter of the first casting roll 2.
  • the coolant applying means 6 for the first casting roll 2 are at least 25% of the diameter of the first casting roll 2 from the vertically extending metal strand 4 ' spaced.
  • the coolant application devices 6 can be arranged in a region of the casting rolling device that is not otherwise installed and adjusted. It is therefore possible, as shown in FIG 2 between the metal strand 4 'and thehariffenetzbring Skring Roaden 6 for the first casting roll 2, a shield device 10 - for example, a shield plate - to order.
  • the shield device 10 By means of the shield device 10, on the one hand, the metal strand 4 'can be shielded against evaporating, but still relatively cold, cooling medium 7, which could otherwise reach the hot metal strand 4.
  • the screen device 10 may in turn be cooled, for example by means of an internal water cooling.
  • FIG 3 shows some further possible embodiments of the present invention.
  • the embodiments can be implemented independently of each other.
  • FIG. 3 shows that the coolant lines 8 are encased with a thermal insulation 11. This prevents - even with relatively long coolant lines 8 - prevents the heat input from the outside, the coolant located in the coolant lines 8 7 heated too much.
  • FIG 3 shows that in the coolant lines 8 gas separator 12 are arranged (or at least one Gasab ⁇ separator is disposed).
  • the gas separator 12 are preferential as ⁇ shortly before valves 13 are arranged, which are arranged in the coolant ⁇ lines.
  • the valves 13 may be formed as proportional valves.
  • the valves are, however, 13 is formed as Wegven ⁇ tile, the (entirely) are closed so opened or depending on the switching state of either (completely), see FIG 4.
  • the valves 13 are preferably controlled by a control inputs direction 14, even in the ongoing operation of the casting rolling device.
  • the applied in time average to the first casting roll 2 amount of cooling medium 7 can be adjusted, for example, characterized in that - similar to a pulse width modulation - the valves namely be 13 driven with a fixed clock cycle ⁇ time T, but an opening portion T is So 4 shows in the left panel, for example, a drive state of within the clock cycle time T depending ⁇ "set.
  • FIG. 4 shows in the right-hand part a triggering state of the valves 13, in which a relatively large amount of cooling medium 7 is applied to the first casting roll 2.
  • FIG. 3 shows that a distance a of the coolant application devices 6 from the first casting roller 2 can be set. This is indicated in FIG. 3 by a corresponding double arrow A.
  • an orientation of the coolant application devices 6 relative to the first casting roll 2 can be adjustable. This is indicated in FIG. 3 by a corresponding double arrow B.
  • the distance a and / or the orientation of the coolant application devices 6 can also be adjustable by means of the control device 14-preferably also during ongoing operation of the cast rolling device.
  • a plurality of coolant application devices 6 are generally present, which are distributed over the width of the first casting roll 2. Purely by way of example, six such coolant application devices 6 are shown in FIG. The number can be larger or smaller as needed.
  • Coolant applicators 6 only a single valve 13 required.
  • the coolant application devices 6 are individually controllable - see in FIG. 5 the two left and the two right coolant application devices 6.
  • a plurality of coolant application devices 6 -see in FIG. 5 the two middle coolant application devices 6- can be combined to form a group which is always controlled as a group in a uniform manner (but independently of other groups).
  • each group of Coolant ⁇ accommodating means 6 are each a common valve 13 before ⁇ hands.
  • the cooling according to the invention of the first casting roll 2 can be regulated to ⁇ special.
  • the casting roll ⁇ device at least one sensor 15.
  • an actual characteristic of the first casting roll 2 can be detected.
  • suitable IGBen are the temperature (possibly as a function of the location seen in the width direction) and the crown of the first casting roll 2.
  • suitable actual properties of the metal strip 4 'are in particular profile data of the metal strip 4' along the width of Me ⁇ tallstrangs 4 seen '.
  • the detected altitude is supplied to the control device 14.
  • the control device 14 automatically determines a control state of the cooling device 5 (for example a control pattern for the valves 13, for the orientation of the coolant attachment devices 6 and / or the distances a of the coolant application devices 6) as a function of the armature being supplied and a corresponding target property the cooling device 5 accordingly.
  • the second casting roll 2 'and its cooling can be configured in an analogous manner.
  • the present invention has many advantages. Insbeson ⁇ particular, a high due to the large temperature difference between the cooling medium and 7 (of heated) casting roll 2, 2 'and the phases senübergangs upon evaporation of the cooling medium 7
  • Cooling capacity can be achieved. Due to the fact that the cooling medium 7 is inert, it may further be used to form an inert atmosphere within the casting roll apparatus. Due to the fact that the cooling medium 1 'completely evaporates before the casting rolls 2, 2' again come into contact with the hot molten metal 4, no stripping, suction or other removal devices for the cooling medium 7 are required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Selon l'invention, on fait couler un métal liquide (4) dans une zone à lingotière (1) laquelle est délimitée sur au moins un côté par un premier cylindre de coulée (2) montée rotative autour d'un premier axe de rotation (3). Depuis la zone à lingotière (1) on extrait une barre métallique (4') obtenue par solidification dudit métal liquide (4). A travers un premier système de refroidissement (5), on applique sur la surface du premier cylindre de coulée (2) un milieu de refroidissement (7) liquide au moyen d'un certain nombre de systèmes d'application de réfrigérant (6). Les premiers systèmes d'application de réfrigérant (6) sont alimentés en réfrigérant (7) au travers de premières lignes de réfrigérant (8). Il est inerte par rapport au métal liquide (4), présente à pression atmosphérique normale un point d'ébullition standard inférieur à 20 °C - notamment inférieur à -20 °C - et présente une température de fonctionnement inférieure ou égale à un point d'ébullition de fonctionnement. Le point d'ébullition de fonctionnement se rapporte à une pression de fonctionnement (p) à laquelle est soumis le milieu de refroidissement (7). Au moins un capteur (15) permet de détecter une propriété réelle du premier cylindre de coulée (2) ou une propriété réelle de la barre métallique (4'). Ladite propriété réelle est transmise à un système de commande (14) du premier système de refroidissement (5). En fonction de la propriété réelle qui lui est transmise et d'une propriété de consigne correspondante, le système de commande (14) détermine automatiquement un état de commande du premier système de refroidissement (5) pour commander le premier système de commande (5) d'une manière correspondante.
EP12740923.3A 2011-10-12 2012-07-10 Procédé de laminage par coulée avec refroidissement cryogène des laminoirs par coulée Not-in-force EP2739416B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12740923.3A EP2739416B1 (fr) 2011-10-12 2012-07-10 Procédé de laminage par coulée avec refroidissement cryogène des laminoirs par coulée

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11184849.5A EP2581150A1 (fr) 2011-10-12 2011-10-12 Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée
PCT/EP2012/063451 WO2013053506A1 (fr) 2011-10-12 2012-07-10 Procédé de coulée-laminage comportant un refroidissement cryogénique des cylindres de coulée
EP12740923.3A EP2739416B1 (fr) 2011-10-12 2012-07-10 Procédé de laminage par coulée avec refroidissement cryogène des laminoirs par coulée

Publications (2)

Publication Number Publication Date
EP2739416A1 true EP2739416A1 (fr) 2014-06-11
EP2739416B1 EP2739416B1 (fr) 2018-08-29

Family

ID=46598480

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11184849.5A Withdrawn EP2581150A1 (fr) 2011-10-12 2011-10-12 Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée
EP12740923.3A Not-in-force EP2739416B1 (fr) 2011-10-12 2012-07-10 Procédé de laminage par coulée avec refroidissement cryogène des laminoirs par coulée

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11184849.5A Withdrawn EP2581150A1 (fr) 2011-10-12 2011-10-12 Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée

Country Status (5)

Country Link
US (1) US9457397B2 (fr)
EP (2) EP2581150A1 (fr)
KR (1) KR101945074B1 (fr)
CN (1) CN103874553B (fr)
WO (1) WO2013053506A1 (fr)

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EP2581150A1 (fr) 2011-10-12 2013-04-17 Siemens Aktiengesellschaft Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée
CN109996623B (zh) * 2016-11-29 2021-07-30 Sms集团有限公司 运输装置
CN107999716A (zh) * 2017-12-28 2018-05-08 西南铝业（集团）有限责任公司 一种铝合金铸造结晶器
WO2019217700A1 (fr) * 2018-05-09 2019-11-14 Nucor Corporation Procédé de modification de profil de rouleau de coulée par modification de température localisée
CN108788035A (zh) * 2018-07-19 2018-11-13 芜湖君华材料有限公司 一种液氮冷却型快淬冷却铜辊
CN108817333A (zh) * 2018-07-20 2018-11-16 芜湖君华材料有限公司 一种封闭节能型合金材料结晶仓
WO2022231509A1 (fr) * 2021-04-28 2022-11-03 Neo Performance Materials (Singapore) Pte Ltd Procédés et systèmes pour la production de matériau magnétique

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Also Published As

Publication number Publication date
KR20140073524A (ko) 2014-06-16
EP2739416B1 (fr) 2018-08-29
CN103874553B (zh) 2016-01-20
EP2581150A1 (fr) 2013-04-17
US9457397B2 (en) 2016-10-04
WO2013053506A1 (fr) 2013-04-18
KR101945074B1 (ko) 2019-02-08
US20140290898A1 (en) 2014-10-02
CN103874553A (zh) 2014-06-18

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