EP2581150A1 - Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée - Google Patents

Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée Download PDF

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Publication number
EP2581150A1
EP2581150A1 EP11184849.5A EP11184849A EP2581150A1 EP 2581150 A1 EP2581150 A1 EP 2581150A1 EP 11184849 A EP11184849 A EP 11184849A EP 2581150 A1 EP2581150 A1 EP 2581150A1
Authority
EP
European Patent Office
Prior art keywords
coolant
casting roll
cooling medium
casting
metal strand
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Withdrawn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
EP11184849.5A
Other languages
German (de)
English (en)
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.)
Siemens AG
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 EP11184849.5A priority Critical patent/EP2581150A1/fr
Priority to KR1020147009473A priority patent/KR101945074B1/ko
Priority to PCT/EP2012/063451 priority patent/WO2013053506A1/fr
Priority to EP12740923.3A priority patent/EP2739416B1/fr
Priority to US14/351,347 priority patent/US9457397B2/en
Priority to CN201280050281.0A priority patent/CN103874553B/zh
Publication of EP2581150A1 publication Critical patent/EP2581150A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • 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

  • Such cast rollers are well known. Purely by way of example is on the EP 0 736 350 B1 , the EP 0 313 516 A1 and the US 2006/237 162 A1 directed.
  • the shaping of the metal strand subsequent to the casting can only influence the profile and flatness of the final product to a limited extent. For this reason, it is advantageous to impress the cast metal strand already in the casting process, a suitable thickness profile or a suitable thickness contour and thereby to avoid, among other things, a thickness wedge as possible.
  • the known fact that the cast strip thickness depends substantially on the heat flow via the casting roll surface and the contact time is utilized for influencing the cast profile in twin-roll belt casting machines. Both factors together determine how thick the relevant body can form the band shell. On the variation of these sizes on the casting roll width can thus be influenced to a considerable extent the thickness profile of the cast metal strand.
  • the contour of the casting roll and the setting (position and / or contact pressure) of the casting rolls themselves is influenced by the thermal expansion and thus 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 usually set in the prior art by an internal cooling - possibly supplemented by an external cooling - set.
  • the contact time is determined by the rotational speed of the casting roll, the casting roll geometry and the casting level. For a smooth melt surface, the contact time is to a first approximation constant over the width of the cast strand. Thus, only the heat flow remains as a possible manipulated variable to influence the strand shell thickness and the roll geometry over the strand width.
  • the adding device for the corresponding gas may be arranged in the local vicinity of the triple point of the melt, roller and gas space in order to be able to introduce the gas in a targeted manner between the forming strand shell and the casting roll.
  • 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 manuwalzvoriques, by means of which a reliable and reliable cooling of the casting roll can be achieved in a simple and efficient manner.
  • a casting rolling device of the type mentioned above in that the cooling medium is inert with respect to the molten metal, having a normal air pressure relative to standard boiling point below 20 ° C - in particular below -20 ° C has - and has an operating temperature which is at an operating boiling point or less, where the operating boiling point is related to an operating pressure, with which the cooling medium is applied.
  • the axis of rotation is oriented horizontally. Often, the metal strand is further removed down from the mold area. In this case, based on the axis of rotation and seen in the direction of rotation of the casting roll, an angle from a casting gap of the mold area to a application point, at which the liquid cooling medium is applied to the surface of the casting roll, preferably between 60 ° and 240 °, in particular between 90 ° and 180 °.
  • the coolant application devices may in particular be arranged below the casting roller in the cast rolling device according to the invention. It is therefore not necessary to arrange thedeschaufbring adopteden in the confined space above the G manapt.
  • a shielding device for thermal shielding of the metal strand against the coolant and / or for thermal shielding of theisseritz Stammbring adopteden against the metal strand is arranged.
  • the coolant lines are sheathed 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 the transport of the cooling medium from a reservoir to theisserschetzbring Anlagenen takes.
  • gas separators are arranged in the coolant lines. This makes it possible to ensure that the cooling medium in the coolant lines in the region of the gas separators to thedeffenaufbring Roaden - in particular in the gas separators downstream valves - completely in liquid form and does not form gas bubbles.
  • controllable valves are also arranged in the coolant lines.
  • the valves are preferably designed as switching valves. With this configuration, a defined coolant flow is adjustable in a particularly simple manner.
  • thedeffenaufbring spuren are arranged distributed over the width of the casting roll.
  • the coolant application devices can in particular be controlled individually or in groups.
  • a distance of thedeffenaufbring overlookeden from the casting roll and / or an orientation of thedeffenaufbring noticeden is adjustable relative to the casting roll. Also by this procedure, the cooling capacity can be adjusted. In particular, it is possible for the distance and / or the orientation of the coolant application devices to be adjustable by means of a control device during ongoing operation of the cast rolling device.
  • the G manuwalzvoriques comprises at least one sensor by means of which an Imonyschaft the casting roll or an Imonyschaft the metal strand is detected that the Imonyschaft a control device of the cooling device is supplied and that the control device in dependence on the her supplied Imonyschaft and a corresponding target property automatically determines a driving state of the cooling device and controls the cooling device accordingly.
  • the cooling medium may in particular be liquid nitrogen, a liquid noble gas - in particular argon - or an organic refrigerant.
  • a casting rolling apparatus 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 rotates during operation of the casting rolling device about a first axis of rotation 3.
  • a second casting roll 2 ' is present, whose axis of rotation 3' runs parallel to the first axis of rotation 3 of the first casting roll 2.
  • the second casting roll 2 ' rotates in operation in opposite directions to the first 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 metal strand 4 'produced by solidification of the molten metal 4 is removed from the mold region 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 internal cooling is in the context of the present invention of minor importance and therefore not shown in the FIG.
  • the Gellowalzvorraum - optionally for each casting roll 2, 2 '- a cooling device 5, 5'.
  • the liquid cooling medium 7 is applied from the outside to the surface of the respective casting roll 2, 2'.
  • Thedestoffetzbring Spuren 6, 6 ' may be formed as needed. In particular, they can be designed as conventional spray nozzles, for example as flat jet nozzles, as cone nozzles or as point nozzles.
  • the cooling medium 7 is thedeffenaufbring Rheinen 6, 6 'via corresponding coolant lines 8, 8' from a reservoir 7 "supplied (see also FIG. 2 ).
  • a pump 7 ' may be present, but is not mandatory.
  • 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 -188.8 ° 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 refrigerant has a standard boiling point of -26 ° C. Its operating temperature is preferably below -30 ° C, but above -100 ° C, preferably above -80 ° C.
  • FIG. 2 - and also according to FIG. 1 - Is the first axis of rotation 3 horizontally oriented.
  • the second axis of rotation 3 ' is usually at the same height as the first axis of rotation 3, so that the two axes of rotation 3, 3' lie in a common horizontal plane. In this level, there is the smallest distance between the two casting rolls 2, 2 'from each other (casting gap 9).
  • the metal strand 4 ' is according to FIG. 2 continue to drain down from the mold area 1.
  • the place of application is the place where the cooling medium 7 is applied to the surface of the first casting roll 2.
  • An 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 location, may for example be between 60 ° C and 240 ° C. As a rule, the angle ⁇ is between 90 ° C and 180 ° C.
  • the coolant applicators 6 for the first casting roll 2 may be adjacent or as shown in FIG FIG. 2 represented and preferred according to the invention - be arranged 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 by FIG. 2 between the metal strand 4 'and thehariffenetzbring Skarter 6 for the first casting roll 2, a shield device 10 - for example, a shield plate - to order.
  • a shield device 10 for example, a shield plate - to order.
  • 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 coolant application devices 6 for the first casting roll 2 and the corresponding coolant lines 8 can be shielded against the radiant heat of the still hot metal strand 4 '.
  • the shielding device 10 can in turn be cooled, for example by means of an internal water cooling.
  • FIG. 3 shows some other possible embodiments of the present invention. The embodiments can be implemented independently of each other.
  • gas separators 12 are arranged in the coolant lines 8 (or at least one gas separator is arranged).
  • the gas separators 12 are preferably arranged shortly before valves 13, which are arranged in the coolant lines 8.
  • the valves 13 may be formed as proportional valves. Preferably, however, the valves 13 are designed as switching valves, which are thus depending on the switching state either (fully) open or (fully) closed, see FIG. 4 , The valves 13 are preferably controlled by a control device 14, even during ongoing operation of the G manwalzvorraum.
  • the time applied to the first casting roll 2 amount of cooling medium 7 can be adjusted, for example, that - like a pulse width modulation - the valves 13 are indeed controlled with a fixed clock cycle time T, within the Clock cycle time T, however, an opening proportion T 'is set.
  • FIG. 4 in the left-hand area for example, a control state of the valves 13, in which a relatively small amount of cooling medium 7 is applied to the first casting roll 2, while FIG. 4 in the right part shows a driving 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 a distance a of the coolant application devices 6 from the first casting roller 2 is adjustable. This is in FIG. 3 indicated by a corresponding double arrow A. Alternatively or additionally, an orientation the coolant applicator 6 relative to the first casting roll 2 be adjustable. This is in FIG. 3 indicated 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.
  • FIG. 5 six suchdeschetzbring Anlagenen 6 shown. The number can be larger or smaller as needed.
  • coolant application devices 6 are controlled jointly. In this case, only a single valve 13 is required for thedeffenaufbring Roaden 6.
  • the coolant application devices 6 are individually - see FIG. 5 the two left and two right coolant application 6 - driven.
  • a plurality of coolant application devices 6 each - see FIG. 5 the two middledestoffetzbring Skeller 6 - be summarized into a group that is controlled as a group always uniform (but independent of other groups). In this case it is sufficient if in each case a common valve 13 is present per group of coolant application devices 6.
  • the cooling according to the invention of the first casting roll 2 can be regulated in particular.
  • an armature of the first casting roll 2 can be detected by means of the sensor 15.
  • 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.
  • an armature of the metal strand 4 ' can be detected by means of the sensor 15.
  • the detected altitude is supplied to the control device 14.
  • the control device 14 automatically determines a drive state of the cooling device 5 (for example a control pattern for the valves 13, for the orientation of the coolant application devices 6 and / or the distances a of the coolant application devices 6) as a function of the altitude applied thereto and a corresponding target property and controls 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.
  • a high cooling capacity can be achieved.
  • 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 7 'completely evaporates before the casting rolls 2, 2' again come into contact with the hot molten metal 4, further no stripping, suction or other removal means for the cooling medium 7 are required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP11184849.5A 2011-10-12 2011-10-12 Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée Withdrawn EP2581150A1 (fr)

Priority Applications (6)

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
KR1020147009473A KR101945074B1 (ko) 2011-10-12 2012-07-10 주조 롤의 극저온 냉각에 의한 압연 주조 방법
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
US14/351,347 US9457397B2 (en) 2011-10-12 2012-07-10 Roll casting method with cryogenic cooling of casting rolls
CN201280050281.0A CN103874553B (zh) 2011-10-12 2012-07-10 利用低温冷却无锭轧制件的铸坯直接轧制法

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP2581150A1 true EP2581150A1 (fr) 2013-04-17

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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 After (1)

Application Number Title Priority Date Filing Date
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

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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9457397B2 (en) 2011-10-12 2016-10-04 Siemens Aktiengesellschaft Roll casting method with cryogenic cooling of casting rolls
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

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Publication number Priority date Publication date Assignee Title
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
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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JPS5897467A (ja) * 1981-12-04 1983-06-09 Kawasaki Steel Corp 金属薄帯製造用急冷ロ−ルの冷却装置
EP0313516A1 (fr) 1987-10-23 1989-04-26 Lauener Engineering AG Dispositif et méthode pour refroidir des cylindres ou des rouleaux
US5149488A (en) * 1990-03-28 1992-09-22 Dickson Enterprises, Inc. Apparatus and method for spill chilling rapidly solidified materials
US5787967A (en) * 1995-04-07 1998-08-04 Usinor Sacilor Process and device for adjusting the crown of the rolls of metal strip casting plant
US20060237162A1 (en) 2004-12-13 2006-10-26 Nucor Corporation Method and apparatus for localized control of heat flux in thin cast strip

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US7891407B2 (en) * 2004-12-13 2011-02-22 Nucor Corporation Method and apparatus for localized control of heat flux in thin cast strip
EP2047187A4 (fr) * 2006-07-19 2011-06-08 Carrier Corp système réfrigérant avec modulation DE largeur D'impulsions pour circuit de réchauffement
JP5428173B2 (ja) * 2008-03-21 2014-02-26 株式会社Ｉｈｉ 圧延機及び圧延方法
EP2581150A1 (fr) 2011-10-12 2013-04-17 Siemens Aktiengesellschaft Dispositif de laminage par coulée avec refroidissement cryogène des laminoirs par coulée

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS561250A (en) * 1979-06-15 1981-01-08 Matsushita Electric Ind Co Ltd Production of rapidly cooled alloy sheet
JPS5897467A (ja) * 1981-12-04 1983-06-09 Kawasaki Steel Corp 金属薄帯製造用急冷ロ−ルの冷却装置
EP0313516A1 (fr) 1987-10-23 1989-04-26 Lauener Engineering AG Dispositif et méthode pour refroidir des cylindres ou des rouleaux
US5149488A (en) * 1990-03-28 1992-09-22 Dickson Enterprises, Inc. Apparatus and method for spill chilling rapidly solidified materials
US5787967A (en) * 1995-04-07 1998-08-04 Usinor Sacilor Process and device for adjusting the crown of the rolls of metal strip casting plant
EP0736350B1 (fr) 1995-04-07 2001-09-19 Usinor Procédé et dispositif de réglage du bombé des cylindres d'une installation de coulée de bandes métalliques
US20060237162A1 (en) 2004-12-13 2006-10-26 Nucor Corporation Method and apparatus for localized control of heat flux in thin cast strip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9457397B2 (en) 2011-10-12 2016-10-04 Siemens Aktiengesellschaft Roll casting method with cryogenic cooling of casting rolls
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

Also Published As

Publication number Publication date
KR20140073524A (ko) 2014-06-16
EP2739416B1 (fr) 2018-08-29
CN103874553B (zh) 2016-01-20
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
EP2739416A1 (fr) 2014-06-11

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