EP3599036A1 - Cage de laminoir pourvu de dispositif de refroidissement hybride - Google Patents

Cage de laminoir pourvu de dispositif de refroidissement hybride Download PDF

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Publication number
EP3599036A1
EP3599036A1 EP18185862.2A EP18185862A EP3599036A1 EP 3599036 A1 EP3599036 A1 EP 3599036A1 EP 18185862 A EP18185862 A EP 18185862A EP 3599036 A1 EP3599036 A1 EP 3599036A1
Authority
EP
European Patent Office
Prior art keywords
spray
nozzles
bar
flat
roll
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
EP18185862.2A
Other languages
German (de)
English (en)
Other versions
EP3599036B1 (fr
Inventor
Markus Fischer
Erich Opitz
Lukas PICHLER
Christoph Proell
Alois Seilinger
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 Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP18185862.2A priority Critical patent/EP3599036B1/fr
Priority to US17/261,205 priority patent/US11559830B2/en
Priority to PCT/EP2019/067939 priority patent/WO2020020592A1/fr
Priority to RU2021104618A priority patent/RU2764692C1/ru
Priority to CN201980049887.4A priority patent/CN112423905B/zh
Publication of EP3599036A1 publication Critical patent/EP3599036A1/fr
Application granted granted Critical
Publication of EP3599036B1 publication Critical patent/EP3599036B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally

Definitions

  • a water box is assigned to the upper and lower work rolls, which is in close contact with the respective work roll on the outlet side of the roll stand.
  • a turbulent water flow is generated by means of the respective water box, by means of which the work rolls are cooled efficiently.
  • the water boxes must be positioned very precisely in relation to the work rolls. If the distance is too small, there is a risk of damage to the work rolls and / or the water tanks. If the distance is so large, cooling cannot be carried out efficiently.
  • a rolling stand in which a single chilled beam is arranged on the outlet side of the rolling stand.
  • the cooling beam has several rows of spray nozzles, the rows in the width direction of the rolling stock or run parallel to the work rolls.
  • the spray nozzles in the series are designed as full jet nozzles. With this configuration, intensive cooling of the work rolls is possible. However, considerable effort is required to ensure uniform cooling over the entire width of the work rolls.
  • the roll stands have additional elements.
  • One of the additional elements is an upper stripping element, by means of which the coolant applied to the outlet side of the upper work roll is stripped from the upper work roll.
  • the wiping element is necessary so that the coolant does not run down onto the flat rolled material in an uncontrolled manner and influences its temperature in an uncontrolled manner.
  • a pool of liquid coolant often forms above the upper wiping element. This pool has a negative influence on the cooling by the flat jet nozzles. The desired cooling of the upper work roll is therefore often difficult to achieve.
  • the object of the present invention is to design a roll stand of the type mentioned at the outset in such a way that, with a simple construction, highly efficient and uniform cooling of the upper work roll can be achieved.
  • a roll stand of the type mentioned at the outset is designed in that at least some of the lower ones Spray nozzles - usually all lower spray nozzles - are designed as full jet nozzles.
  • Full jet nozzles are spray nozzles that emit an essentially straight coolant jet.
  • the coolant jet usually has a circular or almost circular cross section. The cross section varies only to a very small extent with the distance from the full jet nozzle.
  • an opening angle of the emitted coolant jet is at most 5 °.
  • Flat jet nozzles on the other hand, have a spray pattern in which the emitted coolant jet expands in a fan-like manner.
  • the opening angle of the fan is at least 20 °. In practice, it is usually 40 ° or more.
  • the coolant emitted by a flat jet nozzle thus strikes the upper work roll essentially in the form of an elongated line.
  • Full jet nozzles generate a significantly higher impact pressure on the work roll than flat jet nozzles due to the bundled delivery of the coolant at the same coolant pressure in the respective spray bar.
  • the higher impact pressure not only results in a higher cooling effect. It is particularly important that the full jet is also able to completely penetrate the pool of coolant that may have formed on the upper stripping element.
  • the roll stand In the simplest case, only the upper and lower spray bars are assigned to the upper work roll on the outlet side. Alternatively, however, it is possible for the roll stand to have at least one central spray bar. In this case, the at least one central spray bar is arranged between the upper and the lower spray bar. It extends parallel to the upper work roll and has a plurality of middle spray nozzles, by means of which the liquid coolant is sprayed onto the upper work roll.
  • the middle spray nozzles of each middle spray bar are generally either at least in a central region of the respective middle spray bar as flat jet nozzles or uniform as Full jet nozzles designed. If, for example, two middle spray bars are present, it is possible that the spray nozzles of both middle spray bars are designed as flat jet nozzles.
  • the spray nozzles of the two middle spray bars can be designed uniformly as full jet nozzles.
  • the spray nozzles of the one central spray bar are configured uniformly as flat jet nozzles, and the spray nozzles of the other middle spray bar are configured uniformly as full jet nozzles.
  • An embodiment in which the spray nozzles of one and the same central spray bar are designed partly as flat jet nozzles and partly as full jet nozzles is, however, possible, but not preferred.
  • the upper spray bar, the middle spray bar and the lower spray bar form a sequence of spray bars when viewed from top to bottom.
  • a change from flat jet nozzles to full jet nozzles preferably takes place only once within the sequence of spray bars for regions of the spray bars corresponding to one another in the width direction of the flat rolled stock.
  • the spray nozzles are designed as full jet nozzles in a certain middle spray bar, then the spray nozzles are preferably also designed as full jet nozzles in every further spray bar that is located below this middle spray bar.
  • the spray nozzles are preferably also designed as flat jet nozzles for every further spray bar located above this middle spray bar.
  • Flat jet nozzles are usually operated with a relatively high working pressure.
  • the working pressure can be up to 20 bar.
  • Full jet nozzles can be operated at a lower pressure.
  • the coolant supplied to the full jet nozzles is therefore preferably subjected to a first working pressure, and the coolant supplied to the flat jet nozzles is subjected to a second working pressure.
  • the first working pressure is usually less than the second working pressure.
  • the first working pressure can be a maximum of 5 bar, while the second working pressure is a minimum of 6 bar.
  • a first working pressure of 1 to 4 bar, in particular 2 to 3 bar, is customary, while the second working pressure is generally between 10 and 20 bar, usually between 12 and 16 bar.
  • first working pressure of approx. 7 bar and a second working pressure of approx. 8 bar.
  • first working pressure can even be greater than the second working pressure.
  • coolant supplied to the full jet nozzles and the coolant supplied to the flat jet nozzles are acted upon with a uniform working pressure. This working pressure can be up to 10 bar.
  • a flat rolling stock 2 is to be rolled by means of a roll stand 1.
  • the flat rolling stock 2 can alternatively be a strip or a heavy plate.
  • the flat rolling stock 2 consists of metal, for example steel, aluminum or copper.
  • the roll stand 1 has at least one upper work roll 3 and one lower work roll 4.
  • the work rolls 3, 4 are those rolls of the roll stand 1 which directly contact and form the flat rolling stock 2 during rolling.
  • the work rolls 3, 4 thus form a roll gap 5 between them, which is passed through by the flat rolling stock 2 in a transport direction x during the rolling of the flat rolling stock 2.
  • the rolling stand 1 can be part of a multi-stand rolling mill, for example a finishing mill.
  • the transport direction x is generally fixed and the same for every rolling process. This configuration is the rule in particular in the case of a metal strip.
  • the roll stand 1 can be designed as a reversing stand. In this case, the transport direction x reverses from roll pass to roll pass.
  • Reversing stands are used in particular for rolling heavy plate. However, they are sometimes also used for rolling metal strip, for example in pre-rolling or in a Steckel mill.
  • the flat rolling stock 2 generally has at least one upper and one lower support roll 6, 7. Sometimes other rollers can also be present, for example an upper and a lower intermediate roller in the case of a sex machine stand.
  • the support rollers 6, 7 and possibly also the intermediate rollers are of secondary importance in the context of the present invention. In the context of the present invention, it is also of secondary importance whether the work rolls 3, 4 and / or any intermediate rolls that are present are axially displaceable.
  • the support rolls 6, 7, the intermediate rolls and the axial displaceability of work rolls 3, 4 and / or intermediate rolls are therefore not discussed in more detail below.
  • an upper cooling device 8 and a lower cooling device 9 are arranged.
  • the upper cooling device 8 By means of the upper cooling device 8, the upper work roll 3 can be cooled on the outlet side, and by means of the lower cooling device 9 the lower work roll 4.
  • Corresponding cooling devices 10, 11 are often also arranged on the inlet side of the roll stand 1.
  • a liquid coolant 12 is applied to the upper and the lower work roll 3, 4 by means of the respective cooling device 8 to 11.
  • the liquid coolant 12 is water or at least contains water as the main constituent - mostly over 95%, for example 99% and more.
  • Each existing cooling device 8 to 11 is also assigned a stripping element 13 to 16.
  • the liquid coolant 12 applied to the respective work roll 3, 4 is wiped off the respective work roll 3, 4 so that it does not reach the flat rolling stock 2.
  • the design of the upper cooling device 8 arranged on the outlet side of the roll stand 1 is crucially important. It is possible that the upper cooling device 10 arranged on the inlet side of the roll stand 1 is designed in the same way. However, it can also be configured otherwise. Only if the roll stand 1 is operated as a reversing stand, this cooling device 10 must also be designed in such a way that the inlet side and outlet side are interchanged with the previous roll pass on each roll pass. It is also possible that the lower cooling devices 9, 11 are designed in a similar manner to the upper cooling devices 8, 10. In this case, the following statements regarding the design of the upper cooling device 8 would apply in mirror image. But they can also be designed in other ways.
  • the upper cooling device 8 arranged on the outlet side of the roll stand 1 has at least one upper spray bar 17 and one lower spray bar 18.
  • the lower spray bar 18 is arranged between the flat rolling stock 2 and the upper spray bar 17 during the rolling of the flat rolling stock 2.
  • the upper and lower spray bars 17, 18 are the only spray bars 17, 18 of the cooling device 8.
  • middle spray bars 19, 20 are also present.
  • the central spray bars 19, 20, if they are present, are arranged between the upper and lower spray bars 17, 20.
  • the number of middle spray bars 19, 20 is usually one or two. There are generally no more than four spray bars 17 to 20.
  • the spray bars 17 to 20 extend parallel to the upper work roll 3. Extending directions of the spray bars 17 to 20 thus run parallel to the axis of rotation 21 of the upper work roll 3.
  • Each spray bar 17 to 20 has a plurality of spray nozzles 22 to 25.
  • the spray nozzles 22 to 25 are arranged side by side as seen in the direction of extension of the respective spray bar 17 to 20.
  • the liquid coolant 12 is sprayed onto the upper work roll 3 by means of the spray nozzles 22 to 25.
  • the spray nozzles 22 des upper spray bar 17 are referred to below as upper spray nozzles 22, the spray nozzles 23 of the lower spray bar 18 as lower spray nozzles.
  • the spray nozzles 24, 25 of the middle spray bars 19, 20 are referred to as middle spray nozzles.
  • the distinction between upper, lower and middle spray nozzles 22 to 25 only serves to assign them to the respective spray bars 17 to 20. The designation has no further significance.
  • FIG 4 shows the spray pattern caused by the spray nozzles 22 to 25 of the spray bars 17 to 20. From the representation in FIG 4 it can be seen that the spray nozzles 22 to 25 are arranged equidistantly as seen in the direction of extension of the spray bars 17 to 20. However, it is also possible to provide a non-equidistant arrangement. For example, it may make sense to provide larger distances on the side edges. It is also possible to combine the spray nozzles 22 to 25 of the respective spray bar 17 to 20 into groups of adjacent spray nozzles 22 to 25, so that each individual group of spray nozzles 22 to 25 can be controlled independently.
  • FIG 4 it also follows that the upper spray nozzles 22 are designed as flat jet nozzles.
  • Flat jet nozzles are as shown in the 5 and 6 Spray nozzles which fan out the liquid jet they emit in one direction, while in the other direction there is only very little fan-out.
  • An opening angle ⁇ in the direction in which the liquid jet is fanned out lies accordingly FIG 5 at least at 20 °, mostly at 40 ° or more.
  • an opening angle ⁇ is 0 °. In practice, it is usually 1 ° to 2 °, but a maximum of 5 °. The opening angle ⁇ is generally independent of the plane being viewed.
  • the spray nozzles 22, 23 of the upper and lower spray bars 17, 18 are each formed uniformly as flat jet nozzles or as full jet nozzles.
  • the upper spray bar 17 - particularly at the edges, as seen in the width direction of the flat rolling stock 2 - can also have other than flat jet nozzles.
  • the lower spray bar 18 can also have other than full jet nozzles, particularly when viewed at its edges in the width direction of the flat rolling stock 2.
  • the middle spray nozzles 24, 25 can be designed as flat jet nozzles or as full jet nozzles as required.
  • each middle spray bar 19, 20 preferably has only a single type of spray nozzle, that is to say either flat jet nozzles or full jet nozzles, but not mixed flat jet nozzles and full jet nozzles. At least, this statement applies in the width direction of the flat rolling stock 2, seen in a central region of the respective central spray bar 19, 20. Relative to each of the middle spray bars 19, 20, the spray nozzles 24, 25 of the respective central spray bar 19, 20 are thus of uniform design. At least
  • the spray bars 17 to 20 form a sequence of spray bars 17, 19, 20, 18, viewed from top to bottom. Within the sequence of spray bars 17, 19, 20, 18, there is preferably only a single change from flat jet nozzles to full jet nozzles. It is therefore possible for the spray nozzles 24, 25 of the two middle spray bars 19, 20 to be designed as full jet nozzles. In this case, the change from flat jet nozzles to full jet nozzles takes place at the transition from the upper spray bar 17 to the upper middle spray bar 19. It is also possible that the spray nozzles 24, 25 of both middle spray bars 19, 20 are designed as flat jet nozzles. In this case, the change from flat jet nozzles to full jet nozzles takes place at the transition from the lower middle spray bar 20 to the lower spray bar 18.
  • the spray nozzles 24, 25 are each one of the two middle spray bars 19, 20 in the form of flat jet nozzles and full jet nozzles.
  • the change from flat jet nozzles to full jet nozzles takes place as shown in FIG 3 in the transition from the upper middle spray bar 19 to the lower middle spray bar 20.
  • An embodiment in which the spray nozzles 24 of the upper middle spray bar 19 as full jet nozzles and the spray nozzles 25 of the lower middle spray bar 20 as Flat jet nozzles are in principle possible, but should be avoided if possible. At least these statements apply to regions of the spray bars 17, 19, 20, 18 that correspond to one another in the width direction of the flat rolling stock 2.
  • the liquid coolant 12 is acted upon by a first working pressure p1, insofar as it is fed to the full jet nozzles, that is, according to the exemplary embodiment, the lower spray nozzles 23 and the middle spray nozzles 25 of the lower middle spray bar 20.
  • the liquid coolant 12 can also be used a second working pressure p2, insofar as it is supplied to the flat jet nozzles according to the exemplary embodiment, that is to say the upper spray nozzles 22 and the middle spray nozzles 24 of the upper middle spray bar 20.
  • corresponding pumps 26, 27 may be present for this purpose.
  • the first working pressure p1 can be set, for example, by a control device 28 by correspondingly controlling the pump 26.
  • the second working pressure p2 can be set, for example, by the control device 28 by correspondingly controlling the pump 27.
  • the setting of the working pressure p1 and / or the working pressure p2 or the volume flow for example, take place via control valves.
  • the two working pressures p1, p2 can be set independently of one another by the control device 28.
  • the first working pressure p1 is according to the embodiment FIG 8 however less than the second working pressure p2.
  • the first working pressure p1 can be approximately 5 bar, in particular approximately 2 bar to 3 bar.
  • the second working pressure p2 is preferably at least 6 bar, for example approximately 12 bar to 16 bar.
  • the liquid coolant 12 regardless of whether it is supplied to the full jet or the flat jet, with a uniform working pressure p.
  • a common pump 29 may be provided for this purpose.
  • the common working pressure p can be set by the control device 28 by controlling the pump 29 accordingly.
  • the working pressure p is preferably a maximum of 10 bar.
  • the working pressure p analogous to the first working pressure p1 - it can be around 2 bar to 3 bar.
  • the present invention has many advantages.
  • the lower region of the upper work roll 3 can also be cooled well when a liquid pool has formed on the associated wiping element 13.
  • the angular range over which the cooling takes place can be maximized.
  • upper stripping elements 13 can be started with the cooling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
EP18185862.2A 2018-07-26 2018-07-26 Cage de laminoir pourvu de dispositif de refroidissement hybride Active EP3599036B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18185862.2A EP3599036B1 (fr) 2018-07-26 2018-07-26 Cage de laminoir pourvu de dispositif de refroidissement hybride
US17/261,205 US11559830B2 (en) 2018-07-26 2019-07-04 Roll stand having a hybrid cooling device
PCT/EP2019/067939 WO2020020592A1 (fr) 2018-07-26 2019-07-04 Cage de laminoir dotée d'un dispositif de refroidissement hybride
RU2021104618A RU2764692C1 (ru) 2018-07-26 2019-07-04 Прокатная клеть с гибридным охлаждающим устройством
CN201980049887.4A CN112423905B (zh) 2018-07-26 2019-07-04 具有混合的冷却装置的轧制机架

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18185862.2A EP3599036B1 (fr) 2018-07-26 2018-07-26 Cage de laminoir pourvu de dispositif de refroidissement hybride

Publications (2)

Publication Number Publication Date
EP3599036A1 true EP3599036A1 (fr) 2020-01-29
EP3599036B1 EP3599036B1 (fr) 2022-06-15

Family

ID=63077810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18185862.2A Active EP3599036B1 (fr) 2018-07-26 2018-07-26 Cage de laminoir pourvu de dispositif de refroidissement hybride

Country Status (5)

Country Link
US (1) US11559830B2 (fr)
EP (1) EP3599036B1 (fr)
CN (1) CN112423905B (fr)
RU (1) RU2764692C1 (fr)
WO (1) WO2020020592A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20006508U1 (de) * 2000-04-08 2000-08-31 Achenbach Buschhuetten Gmbh Walzenkühl- und/oder Schmiervorrichtung für Kaltbandwalzwerke, insbesondere Feinband- und Folienwalzwerke
WO2008149195A1 (fr) 2007-06-04 2008-12-11 Arcelormittal France Laminoir avec dispositif de refroidissement et processus de laminage
DE102009053073A1 (de) * 2009-03-03 2010-09-09 Sms Siemag Aktiengesellschaft Verfahren und Kühlvorrichtung zum Kühlen der Walzen eines Walzgerüstes
US8281632B2 (en) 2007-02-09 2012-10-09 Centre De Recherches Metallurgiques Asbl Device and method for cooling rollers used for rolling in a highly turbulent environment
EP3308868A1 (fr) 2016-10-17 2018-04-18 Primetals Technologies Austria GmbH Refroidissement d'un rouleau d'une cage de laminoir

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SU900894A1 (ru) * 1980-06-06 1982-01-30 Всесоюзный Научно-Исследовательский И Проектный Институт По Очистке Технологических Газов, Сточных Вод И Использованию Вторичных Энергоресурсов Предприятий Черной Металлургии Способ охлаждени прокатных валков листовых станов
SU1227275A1 (ru) * 1984-07-04 1986-04-30 Всесоюзный Научно-Исследовательский И Проектный Институт По Очистке Технологических Газов,Сточных Вод И Использованию Вторичных Энергоресурсов Предприятий Черной Металлургии Способ охлаждени прокатных валков в процессе прокатки
US5212975A (en) * 1991-05-13 1993-05-25 International Rolling Mill Consultants, Inc. Method and apparatus for cooling rolling mill rolls and flat rolled products
EP0776710B1 (fr) 1995-11-20 2001-12-19 SMS Demag AG Dispositif pour influencer le profil d'une bande laminée
KR101804834B1 (ko) * 2011-05-16 2017-12-05 신닛떼쯔 수미킨 엔지니어링 가부시끼가이샤 압연 롤의 세정 장치 및 세정 방법
CN202238899U (zh) 2011-08-23 2012-05-30 安徽精诚铜业股份有限公司 一种轧辊冷却装置
CN104874614B (zh) 2014-02-28 2017-04-26 上海梅山钢铁股份有限公司 乳化液精细冷却***控制方法以及控制装置
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20006508U1 (de) * 2000-04-08 2000-08-31 Achenbach Buschhuetten Gmbh Walzenkühl- und/oder Schmiervorrichtung für Kaltbandwalzwerke, insbesondere Feinband- und Folienwalzwerke
US8281632B2 (en) 2007-02-09 2012-10-09 Centre De Recherches Metallurgiques Asbl Device and method for cooling rollers used for rolling in a highly turbulent environment
WO2008149195A1 (fr) 2007-06-04 2008-12-11 Arcelormittal France Laminoir avec dispositif de refroidissement et processus de laminage
DE102009053073A1 (de) * 2009-03-03 2010-09-09 Sms Siemag Aktiengesellschaft Verfahren und Kühlvorrichtung zum Kühlen der Walzen eines Walzgerüstes
DE102009053074A1 (de) 2009-03-03 2010-09-09 Sms Siemag Ag Verfahren und Kühlvorrichtung zum Kühlen der Walzen eines Walzgerüstes
EP3308868A1 (fr) 2016-10-17 2018-04-18 Primetals Technologies Austria GmbH Refroidissement d'un rouleau d'une cage de laminoir

Non-Patent Citations (1)

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Title
ZAFER KOONT: "Implementation of High Turbulence Roll Cooling at ArcelorMittal Dofasco's Hot Strip Mill", IRON AND STEEL TECHNOLOGY, November 2014 (2014-11-01), pages 43 - 51

Also Published As

Publication number Publication date
US11559830B2 (en) 2023-01-24
CN112423905A (zh) 2021-02-26
WO2020020592A1 (fr) 2020-01-30
RU2764692C1 (ru) 2022-01-19
EP3599036B1 (fr) 2022-06-15
CN112423905B (zh) 2023-07-11
US20210245214A1 (en) 2021-08-12

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