EP3461570B1 - Lingotière de coulée continue - Google Patents

Lingotière de coulée continue Download PDF

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Publication number
EP3461570B1
EP3461570B1 EP18190667.8A EP18190667A EP3461570B1 EP 3461570 B1 EP3461570 B1 EP 3461570B1 EP 18190667 A EP18190667 A EP 18190667A EP 3461570 B1 EP3461570 B1 EP 3461570B1
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EP
European Patent Office
Prior art keywords
mould
cooling channels
mold
upper region
continuous casting
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.)
Active
Application number
EP18190667.8A
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German (de)
English (en)
Other versions
EP3461570A1 (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
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SMS Group GmbH
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Publication date
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Publication of EP3461570A1 publication Critical patent/EP3461570A1/fr
Application granted granted Critical
Publication of EP3461570B1 publication Critical patent/EP3461570B1/fr
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    • 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 according to the preamble of claim 1.
  • cooling channels serve the purpose that the thermally particularly highly stressed areas of the mold walls of a continuous casting mold can be cooled with coolant, in particular with cooling water.
  • coolant in particular with cooling water.
  • cooling channels can e.g. be designed in the form of deep holes, cooling slots or cooling slots with filler pieces.
  • a conventional continuous casting mold is in WO 2010/003695 A1 shown.
  • the mold has an intensive cooling zone in its upper region, with deep-hole bores running essentially vertically being formed in the broad side walls of the mold.
  • the mold In its lower area, the mold has a normal cooling zone, with grooves or pockets incorporated in the mold walls of the mold, which are closed by at least one filler piece and thereby form cooling or flow channels in the normal cooling zone.
  • the deep hole bores 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 as well as the normal cooling zone are connected to a common water supply by means of which the mold is fed with cooling water.
  • FIG. 11 shows a cross-sectional view of a continuous casting mold according to FIG WO 2010/003695 A1 .
  • the note "inlet” indicates that cooling water flows into the cooling channels in the lower region of the mold, the cooling water then entering the bores formed in the intensive cooling zone and then flowing out again in the upper region of the mold, as by marked “return”.
  • the flow channels in the lower region of the mold and the bores 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 area and the lower area of the mold with coolant is not possible.
  • EP 1 356 879 A1 shows a continuous casting mold for liquid metals, which has a mold wall in the form of a copper plate. Cooling channels running in the casting direction are formed in this copper plate, through which coolant can be passed and heat can be dissipated as a result.
  • a liquid-cooled continuous casting mold which has a shaping mold body made of a material of high thermal conductivity such as copper or a copper alloy.
  • cooling channels are provided which extend from the top to the bottom.
  • the distance between a cooling channel and the casting surface in the mold body varies.
  • the invention is based on the object of optimizing a continuous casting mold with regard to the supply of coolant.
  • the invention provides a continuous casting mold which is used in the continuous casting of a metal strand, in particular a steel strand.
  • a continuous casting mold comprises at least one mold wall which has first cooling channels in an upper region of the mold and in a lower region of the mold is provided with second cooling channels. These cooling channels are connected to a coolant supply for the supply of coolant.
  • 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 sealed off from one another or separated from one another by a separating element, so 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 a separate circuit for coolant.
  • the first cooling channels have a variable distance from one another in the upper region in the mold in the longitudinal direction of the mold wall.
  • the second cooling channels provided in the lower region of the mold are each formed by grooves or pockets machined into a mold wall of the mold, which are closed by at least one filler piece to form a flow channel, the first cooling channels provided in the upper region of the mold into the grooves from above or pockets open.
  • the filler piece can be inserted into the mold wall of the mold from its cold side, which serves as an inlet for the first cooling channels and as a return for the second cooling channels.
  • the first cooling channels in the upper region of the mold can have a variable distance from the hot side of the mold.
  • the formation of the first cooling channels in such a way that they have a variable distance from one another in the longitudinal direction of the mold wall is particularly useful in the event that the first cooling channels are designed in particular in the form of bores in a broad side wall of the mold.
  • the variable spacing of the first cooling channels or bores from one another then relates to a longitudinal direction of the broad side wall.
  • the terms “upper area” and “lower area” relate to a mold, the mold walls of which are arranged essentially vertically, with a melt material being filled into the mold from above. Accordingly, the upper region of the mold is located close to or adjacent to the meniscus with which the mold is filled with the liquid metal to be cast. In the lower area of the mold - as usual - the mold outlet is provided, where a strand of the liquid metal emerges from the mold and is transferred into a strand guide.
  • the invention is based on the essential knowledge that due to the fluid-technical partitioning or separation of the first cooling channels in the upper region of the mold from the second cooling channels, which are provided in the lower region of the mold, it is possible that in particular the first cooling channels in the upper region the mold can be fed with coolant with its own pressure level, its own flow rate and possibly also with its own temperature, namely independently of the second cooling channels which are provided in the lower region of the mold. In this way, a stronger cooling can be achieved by means of the first cooling channels in the upper area of the mold compared to the lower area. Accordingly, the first cooling channels in the upper area of the mold form an intensive cooling zone. Thus, with such an individual cooling of the upper area of the mold, which adjoins the meniscus, the problem of the so-called "heat lobe" that occurs in the area below the meniscus can be effectively countered.
  • the first cooling channels in the upper region of the mold and the second cooling channels in the lower region of the mold can expediently 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 flow conditions are independent of the second cooling channels in the lower region of the mold.
  • the coolant quantities for the circuit in the upper region of the mold and for the circuit in the lower region of the mold can be regulated separately from one another, e.g. depending on a particular casting speed and / or a specific metallic material that is produced in the continuous casting process.
  • the above-mentioned individual cooling in its upper area for adaptation to a particular casting process, can be ensured in the same way that the first cooling channels provided in the intensive cooling zone have a variable distance from the hot side of the mold and, for example, in the form of bores are trained.
  • a further contribution to the individual cooling of the mold in its upper area is that the first cooling channels provided in the intensive cooling zone are designed in a broad side wall of the mold, for example in the form of bores, and each have a variable distance from one another.
  • an intensive cooling zone of individually arranged cooling channels for example in the form of deep hole bores in the upper part of a mold wall of the mold, is realized, which is adapted to the requirements of the casting process and the material produced with it.
  • the bores can be arranged close to one another in order to generate a locally adapted intensive cooling effect.
  • a targeted influencing of the bores and the cooling effect associated therewith can also be achieved in that these bores are arranged obliquely in the direction of a vertical, ie run at an angle to the vertical.
  • 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.
  • the first cooling channels of the intensive cooling zone and the second cooling channels of the normal cooling zone are then correspondingly fluidly connected to one another.
  • the coolant circuits in the intensive cooling zone and in the normal cooling zone can then be fed by a common coolant supply, with an individual cooling of the mold in its upper area through the characteristic or variable spacing of the first cooling channels from one another and / or from 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 and the normal cooling zone are formed, is 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 can be a right-hand side boundary for a metal to be cast, ie a broad side wall 13.
  • 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 can 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 labeled "D". The bores 17 are each through on an upper side of the mold wall 12 Closure elements 18 are suitably closed.
  • the cooling channels 14 in the upper region 14 of the continuous casting mold 10 form an intensive cooling zone 11, as will be explained in detail below.
  • the continuous casting mold 10 also comprises a normal cooling zone 19.
  • second cooling channels 22 are provided in a lower region 20 of the continuous casting mold 10, in which grooves or pockets 26 are incorporated in the mold wall 12, which are closed by at least one filler 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 superimposing the intensive cooling zone 11 in the upper region 14 and the normal cooling zone 19 in the lower region 14, and is shown in FIG Fig. 1 labeled "H".
  • the cross-sectional view of Fig. 1 It also makes clear that the first cooling channels 16 in the upper region 14 are sealed off from the second cooling channels 22 in the lower region 20 by a separating element 24 and are therefore separated from the fluid technology.
  • the separating element 24 can, for example, be inserted as a separate part into a bore 17 and adjoin a web 25 running in the mold wall 12 in a sealing manner, which results in the fluidic separation of the first cooling channels 16 from the second cooling channels 22.
  • the separating element 24 is fixedly or permanently inserted in the bore 17 and is connected to the web 25 in a sealing manner.
  • the circuits in the upper region 14 and in the lower region 20 of the continuous casting mold 10 are sealed 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 water tank side (not shown) of a continuous casting plant.
  • a separate coolant supply which can be done via the water tank side (not shown) of a continuous casting plant.
  • the intensive cooling zone 11 can be fed with coolant - independently of the normal cooling zone 19 - e.g. with their own operating variables for pressure, throughput and temperature with which the coolant is passed through the first cooling channels 16 or the bores 17.
  • coolant with its own pressure level, its own flow rate and possibly also its own temperature flows through the first cooling channels 16 in the intensive cooling zone 11, whereby these operating parameters can differ from the supply to the normal cooling zone 19.
  • FIG. 2 and 3 a second embodiment for the continuous casting mold 10 according to the invention is shown, the structure of which is essentially the embodiment of FIG Fig. 1 corresponds.
  • the difference of this second embodiment according to Fig. 2 compared to the first embodiment of Fig. 1 is now that the separating element 24 is not firmly 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 to the closure element 18 by an elongated pin 33.
  • the second embodiment By removing the separating element 24, the second embodiment also enables a modified operating state in which the intensive cooling zone 11 is in fluid connection with the normal cooling zone 19.
  • This operating state is achieved in that when the closure element 18 is dismantled from the top of the mold wall 12, the separating element 24 is simultaneously lifted or removed from the bore 17. Then another closure element can be used to close the bore 17, on which no separating element 24 is provided.
  • closure elements 33 are introduced in the openings on the cold side of the mold wall 12, which in the embodiment of FIG Fig. 1 served as an inlet for the first cooling channels 16 or as a return for the second cooling channels 22, now closure elements 33 are introduced.
  • the above-explained operating state of the mold wall 12 is in the cross-sectional view of FIG Fig. 3 shown.
  • the first cooling channels 16 provided in the upper region 16 are then fluidically 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 then form a common circuit for the coolant, which in the Fig. 3 by the designation "Perm.” and "Rül.” is indicated.
  • Fig. 4 is the mold wall 12 according to one of the Fig. 1-3 shown in perspective from its cold side.
  • the bores 17, which are provided for the intensive cooling zone 11, extend in the vertical direction completely through the mold wall 12 in its upper region 14.
  • the bores 17 are designed 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 its mold wall 12 in that the first Cooling channels 16 or the bores 17 have a variable spacing Pi from one another, ie in the longitudinal direction L of the mold wall 12 (for example a broad side wall 13).
  • the bores 17 - viewed in the longitudinal direction L of the mold wall 12 - have a variable distance Ti from the hot side 32 of the mold wall 12. This is in the representation of Fig. 4 illustrated.
  • the bores 17 are formed obliquely in the vertical direction within the mold wall 12, ie run at an angle ⁇ to the vertical V (cf. Fig. 1 , Fig. 2 ).
  • An individual setting of the cooling capacity for the intensive cooling zone 11 can also be achieved in that - as evidenced by the Fig. 4 - At least two bores 17 each have different values for the mentioned distances Ti, Pi and the angle ⁇ in relation to a planar reference A.
  • An increase in the cooling capacity in the intensive cooling zone 11 is possible, for example, in that a larger number of bores 17, each with a smaller diameter D, are made there. This enables high flow rates to be achieved, which reduces the risk of bubble formation.
  • a second cooling channel 22 which, as explained, is formed by a groove 26 and an associated filler piece 28, a group of bores BG (cf. Fig. 4 ) of at least two bores 17 is assigned, these bores 17, as in the second embodiment according to FIG Fig. 3 explained, then open into a second cooling channel 22.
  • the upper region 14 - in the direction of the vertical - can extend over at least about 60% of the total height H of the continuous casting mold.
  • the intensive cooling zone 11 has a larger length section in the vertical direction compared to the normal cooling zone 19, which likewise results in a stronger cooling in the intensive cooling zone 11.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Claims (8)

  1. Lingotière de coulée continue (10) qui est destinée à la coulée continue d'une barre métallique, en particulier d'une barre en acier, comprenant au moins une paroi de façonnement (12) qui est équipée, dans une zone supérieure (14) de la lingotière (10), de premiers canaux de refroidissement (16) et, dans une zone inférieure (20) de la lingotière (10), de deuxièmes canaux de refroidissement (22); dans laquelle les canaux de refroidissement (16; 22) sont raccordés à une alimentation d'un agent de refroidissement ;
    dans laquelle les premiers canaux de refroidissement (16) dans la zone supérieure (14) de la lingotière (10) et les deuxièmes canaux de refroidissement (22) dans la zone inférieure (20) de la lingotière (10) sont cloisonnés les uns par rapport aux autres à l'intervention d'un élément de séparation (24), d'une manière telle que d'une part les premiers canaux de refroidissement (16) dans la zone supérieure (14) de la lingotière (10) et d'autre part les deuxièmes canaux de refroidissement (22) dans la zone inférieure (20) de la lingotière (10) forment respectivement un circuit propre pour des agents de refroidissement ;
    caractérisée
    en ce que les premiers canaux de refroidissement (16) dans la zone supérieure (14) dans la lingotière (10) présentent, dans la direction longitudinale de la paroi de façonnement (12) une distance variable (Pi) les uns par rapport aux autres ;
    en ce que les deuxièmes canaux de refroidissement (22) qui sont prévus dans la zone inférieure (20) de la lingotière (10) sont réalisés respectivement à l'intervention de rainures ou de poches (26) qui sont incorporées dans une paroi de façonnement (12) de la lingotière (10), qui sont fermées par l'intermédiaire d'au moins une pièce d'obturation (28) afin de former un canal d'écoulement (30) ; dans laquelle les premiers canaux de refroidissement (16) qui sont prévus dans la zone supérieure de la lingotière (10) débouchent à partir du haut dans les rainures, respectivement dans les poches (26) ; et
    en ce que la pièce d'obturation (28) peut être insérée dans la paroi de façonnement (12) de la lingotière (10) à partir du côté froid de cette dernière, qui fait office d'amenée pour les premiers canaux de refroidissement (16) et de retour pour les deuxièmes canaux de refroidissement (22).
  2. Lingotière de coulée continue (10) selon la revendication 1, caractérisée en ce que les premiers canaux de refroidissement (16) dans la zone supérieure (14) de la lingotière (10) et les deuxièmes canaux de refroidissement (22) dans la zone inférieure (20) de la lingotière (10) sont raccordés respectivement à une alimentation séparée d'un agent de refroidissement.
  3. Lingotière de coulée continue (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de séparation (24) peut être retiré ; dans laquelle les premiers canaux de refroidissement (16) du circuit dans la zone supérieure (14) de la lingotière (10) et les deuxièmes canaux de refroidissement (22) du circuit dans la zone inférieure (20) de la lingotière (10) sont reliés les uns aux autres par l'intermédiaire d'une liaison par fluide lorsque l'élément de séparation (24) entre ces circuits a été retiré, d'une manière telle que les premiers canaux de refroidissement (16) dans la zone supérieure (14) de la lingotière (10) débouchent dans les deuxièmes canaux de refroidissement (22) dans la zone inférieure (20) de la lingotière (10).
  4. Lingotière de coulée continue (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que les premiers canaux de refroidissement (16) dans une paroi de façonnement (12) dans la zone supérieure (14) de la lingotière (10) s'étendent à la verticale, au moins dans un tronçon partiel de la zone en question.
  5. Lingotière de coulée continue (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que la distance (Pi) des premiers canaux de refroidissement (16) dans la zone supérieure (14) de la lingotière (10), les uns par rapport aux autres, dans un tronçon médian de la paroi de façonnement (12), est inférieure à celle en vigueur dans les tronçons marginaux de la paroi de façonnement (12).
  6. Lingotière de coulée continue (10) selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une paroi de façonnement (12) de la lingotière (10), dans laquelle sont réalisés les premiers canaux de refroidissement (16) dans la zone supérieure (14) de la lingotière (10), représente une paroi latérale (13) de la lingotière (10) s'étendant sur la largeur de cette dernière.
  7. Lingotière de coulée continue (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que les premiers canaux de refroidissement (16), dans une paroi de façonnement (12), dans la zone supérieure (14) de la lingotière (10), sont réalisés respectivement par l'intermédiaire d'alésages (17).
  8. Lingotière de coulée continue (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que la zone supérieure (14) de la lingotière (10) - dans la direction de la verticale (V) - s'étend au moins sur 40 %, de préférence au moins sur 50 %, de manière plus préférée au moins sur 60 % de la hauteur totale (H) de la lingotière (10).
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 EP3461570A1 (fr) 2019-04-03
EP3461570B1 true EP3461570B1 (fr) 2020-10-07

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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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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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217906A1 (de) * 2002-04-23 2003-11-06 Sms Demag Ag Stranggießkokille für flüssige Metalle, insbesondere für flüssigen Stahl
DE10337205A1 (de) * 2003-08-13 2005-03-10 Km Europa Metal Ag Flüssigkeitsgekühlte Kokille
DE102008032672A1 (de) 2008-07-10 2010-01-14 Sms Siemag Aktiengesellschaft Stranggießkokille
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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DE102017217263A1 (de) 2019-03-28
EP3461570A1 (fr) 2019-04-03

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