EP3461570A1 - Lingotière de coulée continue - Google Patents

Lingotière de coulée continue Download PDF

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Publication number
EP3461570A1
EP3461570A1 EP18190667.8A EP18190667A EP3461570A1 EP 3461570 A1 EP3461570 A1 EP 3461570A1 EP 18190667 A EP18190667 A EP 18190667A EP 3461570 A1 EP3461570 A1 EP 3461570A1
Authority
EP
European Patent Office
Prior art keywords
mold
cooling channels
continuous casting
upper region
cooling
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
EP18190667.8A
Other languages
German (de)
English (en)
Other versions
EP3461570B1 (fr
Inventor
Jörn HOFFMEISTER
Josef Deussen
Thomas Lamberti
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3461570A1 publication Critical patent/EP3461570A1/fr
Application granted granted Critical
Publication of EP3461570B1 publication Critical patent/EP3461570B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds

Definitions

  • the invention relates to a continuous casting mold in each case according to the preamble of claim 1, according to the preamble of claim 13, and according to the preamble of claim 15.
  • cooling channels serve for the purpose that the regions of the mold walls of a continuous casting mold, which are subject to particularly high thermal loads, can be cooled with coolant, in particular with cooling water.
  • coolant in particular with cooling water.
  • cooling channels can e.g. be formed in the form of deep holes, cooling slots or cooling slots with patches.
  • a generic continuous casting mold is in WO 2010/003695 A1 shown.
  • the mold has an intensive cooling zone in its upper region, wherein in particular in the broad side walls of the mold essentially vertically running deep hole bores are formed.
  • the mold In its lower region, the mold has a normal cooling zone, wherein formed in the mold walls of the mold grooves or pockets are formed, which are closed by at least one filler and thus in the normal cooling zone cooling or flow channels are formed.
  • the deep hole bores which are provided in the intensive cooling zone, open into the grooves or pockets of the normal cooling zone.
  • the cooling channels of the intensive cooling zone and the normal cooling zone are connected to a common water supply, by means of which the mold is fed with cooling water.
  • the Fig. 5 shows a cross-sectional view of a continuous casting mold according to WO 2010/003695 A1 , Herein is indicated by the note “inlet” that cooling water flows into the cooling channels in the lower part of the mold, wherein the cooling water then passes into the bores formed in the intensive cooling zone and then flows out again in the upper part of the mold, as indicated by the remark "return". Accordingly, the flow channels in the lower region of the mold and the holes in the upper region of the mold form a common coolant circuit. This is associated with the disadvantage that an individual or separate supply of the upper region and the lower region of the mold with coolant is not possible.
  • the invention has the object to optimize a continuous casting mold with regard to the supply of coolant.
  • the invention provides a continuous casting mold, which is used in a continuous casting of a metal strand, in particular a steel strand.
  • a continuous casting mold comprises at least one molding wall, which is provided in an upper region of the mold with first cooling channels and in a lower region of the mold with second cooling channels.
  • these cooling channels are connected to a coolant supply.
  • the first cooling channels in the upper region of the mold and the second cooling channels in the lower region of the mold can be separated from one another or separated from one another by a separating element, such that on the one hand the first cooling channels in the upper region of the mold and on the other hand, the second cooling channels in the lower region of the mold each form their own circuit for coolant.
  • the first cooling channels in the upper region of the mold have a variable distance from the hot side of the mold, and / or have a variable distance from one another in the longitudinal direction of the mold wall.
  • the latter case is expedient in particular for the case that the first cooling channels are formed in particular in the form of holes in a broad side wall of the mold.
  • the variable distance of the first cooling channels or holes to each other then refers to a longitudinal direction of the broad side wall.
  • a further embodiment of the invention which has an independent significance, relates to a continuous casting mold for the continuous casting of a metal strand, in particular a steel strand, the intensive cooling zone, in an upper region of the mold by in a mold wall of the mold, in particular in a wide side wall extending first cooling channels is formed, and comprises a normal cooling zone, which is formed in a lower portion of the mold by extending in a mold wall of the mold second cooling channels, wherein the second cooling channels are formed by formed in a part of the mold wall of the mold grooves or pockets of at least one Filler are closed to form a channel.
  • the first cooling channels provided in the intensive cooling zone have a variable distance from the hot side of the mold and are designed in the form of bores.
  • the first cooling channels provided in the intensive cooling zone are formed in a broad side wall of the mold and in each case have a variable distance from each other, wherein the first cooling channels are formed in the form of bores.
  • the terms "upper region” and “lower region” refer to a mold, whose mold walls are arranged substantially vertically, wherein a melt is filled from above in the mold. Accordingly, the upper region of the mold is close or adjacent to the casting mirror, with which the mold is filled with the liquid metal to be cast. In the lower part of the mold - as usual - the Kokillenaustritt is provided, where a strand of liquid metal emerges from the mold and is transferred into a strand guide.
  • the invention is based on the essential finding that it is possible due to the fluidic foreclosure or separation of the first cooling channels in the upper region of the mold of the second cooling channels, which are provided in the lower part of the mold, that in particular the first cooling channels in the upper region the mold with coolant with its own pressure level, own flow rate and possibly also be fed with its own temperature, namely independent of the second cooling channels, which are provided in the lower part of the mold.
  • the first cooling channels in the upper region of the mold form an intensive cooling zone.
  • the first cooling channels in the upper region of the mold and the second cooling channels in the lower region of the mold can each be connected to a separate coolant supply.
  • flow conditions with regard to pressure, throughput and temperature can be achieved for the first cooling channels in the upper region of the mold, which are independent of the second cooling channels in the lower region of the mold.
  • the aforesaid individual cooling in its upper region, for adaptation to a respective casting process, can be ensured in the same way by virtue of the fact that the first cooling channels provided in the intensive cooling zone have a variable distance from the hot side of the mold and e.g. are formed in the form of holes. Additionally and / or alternatively contributes to individual cooling of the mold in its upper region, that provided in the intensive cooling zone first cooling channels in a broad side wall of the mold, for. are formed in the form of holes and in this case each have a variable distance from each other.
  • an intensive cooling zone of individually arranged cooling channels e.g.
  • the holes can be arranged close to each other, to produce a locally adapted intensive cooling effect.
  • a targeted influencing of the bores and the associated cooling effect can also be achieved in that these bores are arranged obliquely in the direction of a vertical, i. to the vertical at an angle.
  • the first cooling channels provided in the intensive cooling zone or in the upper region of the mold open into the grooves or pockets which are formed in the normal cooling zone or in the lower region of the mold. Accordingly, the first cooling channels of the intensive cooling zone and the second cooling channels of the normal cooling zone are then fluidly connected to one another.
  • the coolant circuits in the intensive cooling zone and in the normal cooling zone can be fed by a common coolant supply, at the same time an individual cooling of the mold in its upper region by the characteristic or variable spacing of the first cooling channels to each other and / or to the hot side of the mold is ensured.
  • the mold wall of the mold, in which the first and second cooling channels of the intensive cooling zone or the normal cooling zone are formed made of a material of high thermal conductivity, in particular copper or a copper alloy.
  • Fig. 1 shows a cross-sectional view of a mold wall 12 of the continuous casting mold 10 according to the invention according to a first embodiment.
  • This mold wall 12 may be a right-hand lateral boundary for a metal to be cast, ie a broad side wall 13. Accordingly, the wall 32 of the mold wall 12 (in Fig. 1 shown in the image area on the left) exposed to the hot metal and requires cooling.
  • first cooling channels 16 are formed in an upper region 14 of the mold wall 12. These first cooling channels 16 may be formed in the form of (deep hole) bores 17, which extend in the vertical direction through the entire upper region 14. The diameter of these holes 17 is in Fig. 1 denoted by "D". At an upper side of the mold wall 12, the holes 17 are each through Closing elements 18 suitably closed.
  • the cooling channels 14 in the upper region 14 of the continuous casting mold 10 form an intensive cooling zone 11, as explained in more detail below.
  • the continuous casting mold 10 furthermore comprises a normal cooling zone 19.
  • second cooling channels 22 are provided in a lower region 20 of the continuous casting mold 10 by incorporating grooves or pockets 26 in the mold wall 12 which are closed by at least one filler piece 28 to form a flow channel 30.
  • the total height of the continuous casting mold 10 or its mold wall 12 results in the vertical direction by a superposition of the intensive cooling zone 11 in the upper region 14, and the normal cooling zone 19 in the lower region 14, and is in Fig. 1 denoted by "H".
  • the cross-sectional view of Fig. 1 illustrates further that the first cooling channels 16 in the upper region 14 of the second cooling channels 22 in the lower region 20 are sealed off by a separating element 24 and thus separated by fluid technology.
  • the separator 24 may be used in the production of the continuous casting mold 10, for example, as a separate part in a bore 17 and sealingly adjacent to a running in the mold wall 12 web 25, resulting in the fluidic separation of the first cooling channels 16 of the second cooling channels 22 results.
  • the separating element 24 is permanently or permanently introduced in the bore 17 and sealingly connected to the web 25.
  • the first cooling channels 16 in the upper region 14, and on the other hand, the second cooling channels 22 in the lower region 20 each form their own circuit for coolant.
  • the circuits in the upper region 14 and in the lower region 20 of the continuous casting mold 10 are partitioned off from one another by the separating element 24.
  • the first cooling channels 16 and the second cooling channels 22 are each connected to a separate coolant supply, which can be done via the (not shown) water tank side of a continuous casting.
  • the inlets and the return lines for these two circuits of the intensive cooling zone 11 and the normal cooling zone 19 are each denoted by the designations "Zul.” and "Rül.” indicated.
  • the intensive cooling zone 11 can be supplied with coolant, independently of the normal cooling zone 19, e.g. with its own operating variables for pressure, flow rate and temperature, with which the coolant through the first cooling channels 16 and the holes 17 is passed therethrough.
  • the first cooling channels 16 are flowed through in the intensive cooling zone 11 of coolant with its own pressure level, own flow and possibly also with its own temperature, these operating variables may differ from the supply of the normal cooling zone 19.
  • FIGS. 2 and 3 a second embodiment of the inventive continuous casting mold 10 is shown, which in its construction substantially the embodiment of Fig. 1 equivalent.
  • the difference of this second embodiment according to Fig. 2 in comparison to the first embodiment of Fig. 1 consists now in that the separating element 24 is not fixed or permanently inserted into the bore 17 and connected to the web 25, but can be removed if necessary.
  • the separating element 24 is connected by an elongated pin 33 with the closure element 18.
  • the second embodiment By removing the separating element 24, the second embodiment also permits a modified operating state in which the intensive cooling zone 11 is in fluid communication with the normal cooling zone 19.
  • This operating state is achieved in that at a disassembly of the closure element 18 from the top of the mold wall 12 while the separating element 24 is lifted out of the bore 17 and removed simultaneously. Subsequently, to close the bore 17 another closure element can be used, on which no separating element 24 is provided.
  • closure elements 33 introduced in the openings on the cold side of the mold wall 12, which in the embodiment of Fig. 1 serving as an inlet for the first cooling channels 16 and as a return for the second cooling channels 22, now closure elements 33 introduced.
  • the above-described operating state of the mold wall 12 is in the cross-sectional view of Fig. 3 shown.
  • the first cooling channels 16 provided in the upper region 16 are then fluidly connected in a transition region 34 to the second cooling channels 22 provided in the lower region 20.
  • the normal cooling zone 19 and the intensive cooling zone 11 form a common circuit for the coolant, which in the Fig. 3 by the terms "Zul.” and "Rül.” is indicated.
  • Fig. 4 is the mold wall 12 according to one of Fig. 1-3 shown in perspective from its cold side.
  • the bores 17, which are provided for the intensive cooling zone 11, extend completely in the vertical direction through the mold wall 12 in its upper region 14.
  • the bores 17 are formed as deep-hole bores in the upper region 14 of the mold wall 12.
  • An individual cooling performance can also be achieved in the upper region 14 of the continuous casting mold 10 or of the mold wall 12 thereof in that the first Cooling channels 16 and the holes 17 have a variable distance Pi to each other, ie in the longitudinal direction L of the mold wall 12 (eg, a broad side wall 13). Additionally and / or alternatively, it may be provided that the bores 17 -as seen in the longitudinal direction L of the mold wall 12 -have a variable distance Ti to the hot side 32 of the mold wall 12. This is in the presentation of Fig. 4 illustrated. Furthermore, it can also be provided that the holes 17 are formed obliquely in the vertical direction within the mold wall 12, ie extend to the vertical V at an angle ⁇ (see. Fig. 1 . Fig. 2 ).
  • An individual adjustment of the cooling capacity for the intensive cooling zone 11 can also be achieved in that - Fig. 4 - At least two holes 17 each have different values for said distances Ti, Pi and the angle ⁇ with respect to a planar reference A.
  • An increase in the cooling capacity in the intensive cooling zone 11 is for example possible because there is a larger number of holes 17 is introduced, each with a smaller diameter D. As a result, high flow rates can be realized, whereby the risk of blistering is reduced.
  • a second cooling channel 22 which is formed as explained by a groove 26 and an associated filler 28, a bore group BG (see. Fig. 4 ) is assigned by at least two holes 17, these holes 17, as in the second embodiment according to Fig. 3 explained, then open into a second cooling channel 22.
  • the upper region 14 - in the direction of the vertical - extend over at least about 60% of the total height H of the continuous casting mold.
  • the intensive cooling zone 11 in comparison with the normal cooling zone 19, has a larger longitudinal section in the vertical direction, which likewise results in greater cooling in the intensive cooling zone 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP18190667.8A 2017-09-28 2018-08-24 Lingotière de coulée continue Active EP3461570B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017217263.0A DE102017217263A1 (de) 2017-09-28 2017-09-28 Stranggießkokille

Publications (2)

Publication Number Publication Date
EP3461570A1 true EP3461570A1 (fr) 2019-04-03
EP3461570B1 EP3461570B1 (fr) 2020-10-07

Family

ID=63405036

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Application Number Title Priority Date Filing Date
EP18190667.8A Active EP3461570B1 (fr) 2017-09-28 2018-08-24 Lingotière de coulée continue

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EP (1) EP3461570B1 (fr)
DE (1) DE102017217263A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110681834B (zh) * 2019-11-05 2023-09-19 中冶赛迪信息技术(重庆)有限公司 方坯连铸结晶器及冷却方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1356879A2 (fr) * 2002-04-23 2003-10-29 SMS Demag AG Lingotière de coulée continue
EP1506826A1 (fr) * 2003-08-13 2005-02-16 KM Europa Metal Aktiengesellschaft Lingotière pour la coulée continue
WO2010003695A1 (fr) 2008-07-10 2010-01-14 Sms Siemag Ag Lingotière de coulée continue
WO2011093561A1 (fr) * 2010-01-29 2011-08-04 주식회사 풍산 Plaque de lingotière, ensemble de plaque de lingotière et moule de coulée
WO2016207801A1 (fr) * 2015-06-22 2016-12-29 Milorad Pavlicevic Moule pour coulée continue

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1356879A2 (fr) * 2002-04-23 2003-10-29 SMS Demag AG Lingotière de coulée continue
EP1506826A1 (fr) * 2003-08-13 2005-02-16 KM Europa Metal Aktiengesellschaft Lingotière pour la coulée continue
WO2010003695A1 (fr) 2008-07-10 2010-01-14 Sms Siemag Ag Lingotière de coulée continue
WO2011093561A1 (fr) * 2010-01-29 2011-08-04 주식회사 풍산 Plaque de lingotière, ensemble de plaque de lingotière et moule de coulée
WO2016207801A1 (fr) * 2015-06-22 2016-12-29 Milorad Pavlicevic Moule pour coulée continue

Also Published As

Publication number Publication date
DE102017217263A1 (de) 2019-03-28
EP3461570B1 (fr) 2020-10-07

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