EP3427863A1 - Procédé et installation destinés à la fabrication de lingots en métal - Google Patents

Procédé et installation destinés à la fabrication de lingots en métal Download PDF

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Publication number
EP3427863A1
EP3427863A1 EP17180661.5A EP17180661A EP3427863A1 EP 3427863 A1 EP3427863 A1 EP 3427863A1 EP 17180661 A EP17180661 A EP 17180661A EP 3427863 A1 EP3427863 A1 EP 3427863A1
Authority
EP
European Patent Office
Prior art keywords
ladle
metal
mold
strand
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.)
Withdrawn
Application number
EP17180661.5A
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German (de)
English (en)
Inventor
Erfindernennung liegt noch nicht vor Die
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.)
Inteco Melting And Casting Technologies GmbH
Original Assignee
Inteco Melting And Casting Technologies 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 Inteco Melting And Casting Technologies GmbH filed Critical Inteco Melting And Casting Technologies GmbH
Priority to EP17180661.5A priority Critical patent/EP3427863A1/fr
Priority to PCT/EP2018/068234 priority patent/WO2019011776A1/fr
Publication of EP3427863A1 publication Critical patent/EP3427863A1/fr
Withdrawn legal-status Critical Current

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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
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/141—Plants for continuous casting for vertical casting
    • 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
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • 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
    • 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
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the invention relates to a method for producing cast blocks from metal, in particular from steel with alloy components, according to the preamble of claim 1. Furthermore, the invention relates to a system for carrying out the method according to the invention.
  • a method for the production of cast blocks from metal with the features of the preamble of claim 1 is known from WO 2015/101553 A1 the applicant known.
  • the process also known as continuous casting, is a process that has been known and tested for decades and represents a standard for the production of cast blocks of various qualities and dimensions.
  • continuous casting there are applications in which the liquefied metal is not produced directly from the ladle but by using a Taken between intermediate ladle between the ladle and the mold in the mold or poured.
  • the continuous casting process known from the prior art depending on the format (in this case, the cross-sectional area of the cast block), is characterized by casting or block formation rates of between 0.3 m / min and 4 m / min.
  • the metallurgical length is understood to be the length in the cast block, in the region of which the liquefied metal has not yet completely solidified over the cross section of the cast block.
  • such continuous casting process are characterized by the fact that they have a high Enables productivity even with large volumes of steel to process, typically between 100,000 tonnes and 300,000 tonnes per strand per year.
  • the block casting process in which the liquefied metal is poured into a closed in the bottom region vessel, which is removed after solidification of the strand of the strand.
  • the ingot casting method is especially applied to special grades, i. in compositions of the strand or ingot, for which there is typically only a relatively small need, for example, high-alloy steels.
  • the continuous casting process required above for producing the continuous casting process is not worthwhile, because it requires a relatively high technical complexity, in particular through extraction devices for removing the strand from the mold, deflection for transferring the strand produced in vertical continuous casting in a horizontal direction etc.
  • the block casting process is also suitable if the required dimensions of the strand are very large, so that this would lead to extreme machine lengths and investment costs in the case of continuous casting production at the usual continuous casting speeds and casting times.
  • the low yield i.e., the relatively small amount of molten metal that can be used for billet casting in the total amount of molten metal
  • the only average quality of the block exhibited.
  • the present invention seeks to design a known from the prior art continuous casting process such that it is suitable to produce ingots of metals, which typically for the reasons mentioned above, only economically over make the ingot casting process or where the skilled person would typically use the ingot casting process.
  • Essential to the invention is that a casting rate from the ladle or the intermediate vessel in the mold between 50kg / min and a maximum of 300kg / min is set, that the ladle is heated, that the temperature of the metal in the ladle during the entire casting process to a target Temperature is controlled with a temperature tolerance of ⁇ 5 ° C, that the target temperature at the beginning of the casting process is a maximum of 30 ° C above the melting point of the metal to be cast, and that the metallurgical length of the strand is a maximum of 15m. Due to the precise temperature control, the casting speed can be chosen to be relatively small, which has a positive effect on the quality of the cast ingot or strand produced.
  • cast blocks made of metal in particular of steel with alloy constituents, can be produced in the continuous casting process, which have no loss of quality compared to ingots produced in the block casting process and moreover an economical production allow even at relatively low levels, since on the one hand the output is massively increased compared to the block casting process and at the same time the investment costs for a required for the manufacture of such ingots plant can be limited.
  • the method according to the invention is particularly suitable for producing cast blocks made of metal, which use steel with alloy components, so that special qualities are produced due to the alloy constituents, for example particularly high or good strength properties or similar properties desired depending on the alloy constituents respectively.
  • steels are used in which chromium, nickel, molybdenum or tungsten are added individually or in combination as alloy constituents, with the proportion by weight of the total alloy constituents typically being at most 30%.
  • inventive method is also suitable for the production of nickel and / or cobalt superalloys with nickel and cobalt contents of over 50%.
  • an intermediate vessel between the ladle and the mold that the (liquefied) metal in the tundish, especially after emptying the ladle to cool down too much before it is poured into the mold
  • an intermediate vessel is used, provided that this has a maximum of 20% of the volume of the ladle, wherein the metal is not heated in the region of the tundish. Due to the relatively small intermediate vessel is thus excluded that too much heat loss or excessive cooling of the metal takes place in the tundish, which would otherwise only an additional increased target temperature for the metal in the ladle could be compensated, which, however, in turn, among other things, for reasons of energy consumption and quality reasons is not desirable.
  • an intermediate vessel whose volume is between 20% and 100% of the ladle volume, it is envisaged to produce high quality ingots from the above discussion that the tundish is heated, either alternatively to heating the metal in the ladle for single casting or additionally for sequence casting.
  • the process leads to metallurgical lengths in the strand between at least 2m and a maximum of 10m. With such orders of magnitude of the metallurgical length, the desired qualities can be produced particularly easily and well with relatively compact systems.
  • the essential parameters explained in the context of the invention can be additionally specified or optimized and supplemented.
  • the invention also includes a system for carrying out a method according to the invention described so far with a ladle, a mold and a discharge device for removing an at least partially solidified strand from the mold. Due to the procedural parameters provided such a system is typically characterized by the fact that their total height is a maximum of 40m. As a result, the investment costs for the system, which in addition to the costs for the actual system also include building investment costs, significantly limit or significantly reduce.
  • a simplified first system 100 for carrying out the method according to the invention is shown schematically simplified during the regular casting process of a strand 4.
  • the liquid metal 1 contained in a masonry ladle 10 typically consists of steel with alloying constituents, in particular chromium, nickel, molybdenum or tungsten, individually or in combination, the weight proportions of the alloy constituents totaling a maximum of 30%.
  • the ladle 10 is designed as a heated ladle 10 and arranged in operative connection with a heating device 11, which is shown only symbolically and is known per se from the state of the art.
  • the heating device 11 may in particular be an inductive heating device 11, a heating device 11 using two or three graphite or hollow electrodes with or without gas supply or a plasma torch.
  • the metal 1 passes through a likewise lined intermediate vessel 12 in a short, water-cooled oscillating and downwardly open mold 14, which may be provided with a Kokillenrrocker 16, in the liquid metal sump 3, which is enclosed by the forming solidified strand shell of a cast block 5 ,
  • the tundish 12 is typically provided without a heating device.
  • the volume of the intermediate vessel 12 is between 20% and 100% of the volume of the ladle 10 or of the metal 1 located within the ladle 10 then it is preferably provided that the intermediate vessel 12 is provided in a heating device not shown in the FIGURE or is heated.
  • a heating device can then be designed, for example, as induction heating or with two or three graphite or hollow electrodes. It also explains that it is also possible the metal supply to the mold 14 to be made directly from the ladle 10, ie to dispense with an intermediate vessel 12. To protect against oxidation, the liquid metal 1 is discharged through so-called ceramic shadow tubes 18 into the tundish 12 or the mold 14.
  • the metal mirror in the vertically oriented mold 14 is usually covered by casting powder 7.
  • the resting on a bottom plate 20 with a trigger mechanism 22, forming ingot 5 of the strand 4 is withdrawn according to the casting speed down so long from the mold 14 until the desired or due to the volume of the metal 1 in the ladle 10 resulting block length L is reached. There is no deformation of the strand 4 in the longitudinal direction of the strand 4 instead.
  • an optionally provided electromagnetic mold stirrer 16 it is also possible to provide an optionally vertically movable electromagnetic stirrer 24 below the mold 14 in the region of a secondary cooling zone 26 and also in the region of solidification of the cast block 5. Furthermore, one or more isolation devices may be provided below the mold 14 with horizontally movable against the cast block 5 can be placed or stationarily arranged warming bowls 25.
  • the total height H of the plant 100, starting from a foundation 101, is a maximum of 40m, not shown facilities of the plant 100 can be provided above the ladle 10.
  • the cast block 5 produced by the continuous casting method according to the invention is characterized by a metallurgical Length I of the metal sump 3 or the strand 4 between at least 2m and a maximum of 15m, with preferably a maximum of 10m are provided.
  • the casting block 5 is withdrawn from the region of the mold 14 by means of the trigger mechanism 22 continuously in accordance with the casting speed of the metal 1 from the ladle 10 and from the tundish 12 into the mold 14.
  • the casting time for casting the metal 1 in the ladle 10 is preferably at least 70 minutes, with a casting rate being set in the mold 14 per strand 4 between 50 kg / min and 300 kg / min, regardless of the casting format or cross section of the strand 4.
  • the temperature T of the metal 1 in the ladle 10 is controlled to a temperature tolerance of +/- 5 ° C to a target temperature T soll , which is made possible by the heated ladle 10.
  • the target temperature T soll is a preselected temperature, which is a maximum of 30 ° C above the melting point of the metal to be cast 1.
  • a control device 30 can serve in particular, which performs a corresponding control of the heating device 11 as a function of the measured temperature T or is connected to the heating device 11.
  • the in the Fig. 2 illustrated plant 100a is characterized in that instead of the bottom plate 20, a trigger mechanism 22a is used with take-off rollers 27, which pull the strand 4 from the mold 14. Furthermore, the forming ingot 5 of the strand 4 after its solidification by a suitable, vertically movable Separator 28 separated at the level of the dividing line 8 and transported away by means of a vertically movable transport or handling device 29 from the area of the plant 100a.
  • This allows the implementation of the so-called sequence casting, in which the metal 1 can be processed or potted from several G devispannen 10 in time immediately consecutive, without interrupting the casting process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP17180661.5A 2017-07-11 2017-07-11 Procédé et installation destinés à la fabrication de lingots en métal Withdrawn EP3427863A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17180661.5A EP3427863A1 (fr) 2017-07-11 2017-07-11 Procédé et installation destinés à la fabrication de lingots en métal
PCT/EP2018/068234 WO2019011776A1 (fr) 2017-07-11 2018-07-05 Procédé et installation de fabrication de lingots liquides à coeur en métal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17180661.5A EP3427863A1 (fr) 2017-07-11 2017-07-11 Procédé et installation destinés à la fabrication de lingots en métal

Publications (1)

Publication Number Publication Date
EP3427863A1 true EP3427863A1 (fr) 2019-01-16

Family

ID=59315474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17180661.5A Withdrawn EP3427863A1 (fr) 2017-07-11 2017-07-11 Procédé et installation destinés à la fabrication de lingots en métal

Country Status (2)

Country Link
EP (1) EP3427863A1 (fr)
WO (1) WO2019011776A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109663892A (zh) * 2019-03-01 2019-04-23 太原科技大学 一种大型铸锭或铸坯的渐进凝固成型装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015101553A2 (fr) 2013-12-30 2015-07-09 Inteco Special Melting Technologies Gmbh Procédé et installation de production de lingots de grande longueur et de forte section
US20160023269A1 (en) * 2013-03-15 2016-01-28 Posco Casting equipment and casting method using same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160023269A1 (en) * 2013-03-15 2016-01-28 Posco Casting equipment and casting method using same
WO2015101553A2 (fr) 2013-12-30 2015-07-09 Inteco Special Melting Technologies Gmbh Procédé et installation de production de lingots de grande longueur et de forte section

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DR HILMARR ET AL: "StranggießenvonNE-Metallen-einÜberblick", 30 September 2015 (2015-09-30), XP055427909, Retrieved from the Internet <URL:https://www.researchgate.net/profile/Hilmar_Mueller/publication/281861024_Stranggiessen_von_NE-Metallen_-_ein_Uberblick_Continuous_Casting_of_Non-ferrous_Metals_-_an_Overview/links/5603fade08ae1d91e0f1b5b6/Stranggiessen-von-NE-Metallen-ein-Ueberblick-Continuous-Casting-of-Non-ferrous-Metals-an-Overv> [retrieved on 20171122], DOI: 10.13140/RG.2.1.1251.3762/1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109663892A (zh) * 2019-03-01 2019-04-23 太原科技大学 一种大型铸锭或铸坯的渐进凝固成型装置
CN109663892B (zh) * 2019-03-01 2023-08-15 太原科技大学 一种大型铸锭或铸坯的渐进凝固成型装置

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Publication number Publication date
WO2019011776A1 (fr) 2019-01-17

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