EP3519124A1 - VERFAHREN ZUM MEHRFACHGIEßEN VON METALLSTRÄNGEN - Google Patents
VERFAHREN ZUM MEHRFACHGIEßEN VON METALLSTRÄNGENInfo
- Publication number
- EP3519124A1 EP3519124A1 EP17772720.3A EP17772720A EP3519124A1 EP 3519124 A1 EP3519124 A1 EP 3519124A1 EP 17772720 A EP17772720 A EP 17772720A EP 3519124 A1 EP3519124 A1 EP 3519124A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- molds
- metal
- mold
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005058 metal casting Methods 0.000 title description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 99
- 239000002184 metal Substances 0.000 claims abstract description 99
- 238000005266 casting Methods 0.000 claims abstract description 58
- 238000009749 continuous casting Methods 0.000 claims abstract description 39
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 5
- 239000004575 stone Substances 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 6
- 208000015943 Coeliac disease Diseases 0.000 description 26
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005499 meniscus Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B22D11/08—Accessories for starting the casting procedure
- B22D11/081—Starter bars
-
- 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
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- 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
- B22D11/08—Accessories for starting the casting procedure
- B22D11/081—Starter bars
- B22D11/083—Starter bar head; Means for connecting or detaching starter bars and ingots
-
- 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
- B22D11/147—Multi-strand plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
Definitions
- the invention relates to a method for the continuous casting of metal strands, in particular rolled bars of aluminum or an aluminum alloy, in which
- liquid metal is simultaneously poured over a plurality of molds to a plurality of metal strands
- the molds each have a narrow side and a broad side, wherein all molds have a uniform length of the narrow side, so that the
- Metal strands have approximately the same thicknesses after casting, at least one of the molds used has a broad side whose length differs from the length of the broad side of the other simultaneously used molds,
- a sprue for each mold used a sprue is provided, which is arranged on a casting table and is provided for receiving the Anfahrstrfite, wherein the casting of the metal strands comprises Kokillenzllphase at a fixed casting table, in which a plurality of metal strands in the
- the casting comprises a continuous casting phase in which the casting table is lowered and a plurality of metal strands are simultaneously cast.
- Continuous casting metal level is achieved in all molds at the same time. Only then is the continuous casting phase initiated. The mold filling phase for smaller size molds is initiated up to 120 seconds later.
- Ang tellpraxen ie the casting parameters during Kokillen hypoxia, but also the continuous casting practices depending on the particular format of the mold determined.
- the simultaneous casting of metal strands of different format is made possible in a simple manner in that the formats of the cast metal strands, for example, have an identical thickness.
- the withdrawal speed in metal casting or ingot casting is determined essentially by the cooling behavior of the billet or strand and thus by the thickness of the billet or of the metal strand. The casting of the molds, so the
- Mold filling is usually done as quickly as possible to maximize foundry capacity.
- the same aspect then serves the design of sprue stones.
- the use of sprue stones is necessary to achieve even a uniform casting process and to cast a billet, for example, which has relatively homogeneous properties.
- the sprues of small size dies were therefore usually cast with short depth sprues. For example, this reduces waste per billet and shortens the mold filling phase. Short sprue stones are also technically due to a lower draft of the ingots for smaller formats possible. This has to do with the fact that the shrinkage effects are larger in a large-sized ingot than in a small-sized ingot. So far, therefore, the Kokillen hypothesis was operated with different filling rates in order to go through them as quickly as possible. At the same time, different, in particular flat, sprue stones were used for small molds in addition to deeper sprue stones for large molds.
- metal can freeze in feed systems, for example the pouring tube or the pouring nozzle.
- feed systems for example the pouring tube or the pouring nozzle.
- Surface defects such as cold runs or vice versa, rolling out of billets can also occur.
- the metal distributor can freeze to the bottom plate of the solidifying strand due to insufficient temperature control. This can lead to higher reject production.
- the present invention has the object to provide a method for continuous casting of metal strands, in particular of billets made of aluminum or an aluminum alloy, which allows the continuous casting of billets / metal strands with different format with a reduced reject rate.
- the object is achieved in that the depth of the sprue for each mold is at least 50 mm, the Kokillen hypothesis is started at the same time for all molds with an identical filling speed, the casting process at the molds, which have reached the necessary metal level for starting the Strangg smartphase is stopped and the Strangg intelligentphase is started as soon as all dies have reached the metal level necessary for the Strangg intelligentphase.
- the filling rate is the increase of the molten metal in the mold or in the sprue stone relative to the mold during the mold filling phase. Therefore, molds with a small format require a smaller metal volume flow than a large-size mold to achieve an identical filling speed in the mold
- sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold, which are at least 50 mm deep. Because of with the previous methods, sprues are used for each mold,
- At least 50 mm provided with the sprue for example, in molds with small formats despite a possible interruption of the
- the sprue serves as a heat reservoir and provides heat for the further casting process. Due to the heat reservoir of the sprue, irrespective of the size of the mold, it is particularly the danger of the Solidification of the meniscus of the molten metal at the mold, even when stopping the casting process, is significantly reduced and the metal meniscus in the mold, especially in the contact area with the mold, remains liquid. As a result, casting defects can be reduced to a considerable extent.
- the depth of the sprue of the dies used is 100 mm to ISO mm to provide an even larger heat reservoir.
- Angulation stone depths were found to be particularly low failure rates in the multiple casting of metal strips of different sizes. At the same time, the amount of waste metal when separating the Barrenfußes limited.
- the mold filling phase preferably has a duration of 90 seconds to 600 seconds, preferably 120 seconds to 480 seconds.
- the filling rate during the mold filling phase may preferably correspond to the lowering speed of the casting table in the continuous casting phase. Despite the greater amount of time it has become
- a plurality of molds having a broad side length of 900 mm to 2200 mm is preferably used simultaneously, the narrow sides thereof having a substantially uniform length of 400 mm to 600 mm.
- the metal level in the sprue stone is preferably moved over an at least parallel to the broadside direction of the molds
- Non-contact metal sensor for example, measured capacitive and initiated depending on the metal level, the continuous casting. A capacitive measurement of the
- Metal levels have proven to be particularly robust and accurate. It therefore enables process-reliable control of the initiation of the continuous casting phase.
- the casting cross-section is automatically controlled via a metal level control device, so that both the mold filling phase and the
- Continuous casting phase can be done with controlled G confusequerites.
- the metal level in the molds can, for example, be predetermined over a "pouring recipe.”
- Aluminum alloys of the type AAlxxx and AA8xxx as well as alloys of the type AA3xxx and AA6xxx can be cast well with the method according to the invention to metal strands.
- the alloy types differ during casting by their solidification behavior. While low-alloyed aluminum alloys, ie, for example, the alloy types AAlxxx or AA8xxx, form a substantially uniform solidification front, higher alloyed AA3xxx and AAöxxx show Alloys a pulpy solidification front. On the different alloys must, for example, with different Kokillen hypoxia and AA8xxx and
- the broad side length of the molds is preferably selected such that the furnace sump of an upstream melting furnace can be minimized.
- the formats are chosen such that, if possible, only an unavoidable residue remains in the bottom of the melting furnace. This ensures that a subsequent change to another alloy can be carried out as quickly as possible and therefore cost-effectively.
- FIG. 1 is a schematic sectional view of a device for casting a
- Fig. 3 is a schematic sectional view of an apparatus for
- Fig. 1 shows in a schematic sectional view in one embodiment, the principle of continuous casting of a metal strand using a mold 1 a distributor trough 2, a pouring nozzle or a pouring nozzle 3, a distribution network 3b, a plug 4 and a sprue 5, which on a Pouring table 6 is arranged.
- the casting table 6 is movable in height and is admitted during the continuous casting, for example, for cooling purposes in a water bath.
- the mold 1 is water-cooled and can additionally deliver cooling water to the metal strand facing downwards on the metal strand facing the metal strand in order to additionally cool the outer walls of the metal strand.
- a metal sensor 7 may be provided for detecting the metal level, which, as the arrows indicate, for example, can be displaceably arranged in the direction of the broad side of the mold 1.
- the sprue block 5 is formed in the illustrated embodiment in Fig. 1 such that in its center an increase is provided.
- the increase in the middle is optional.
- the sprue 5 has a depth T, which according to the invention is at least 50 mm.
- the depth T of the sprue stone is 100 mm to 150 mm in order to produce a sufficient heat reservoir for the method according to the invention, irrespective of the mold format
- the distributor 2 In the distributor 2 is the supply of liquid molten metal 8, which is replenished via a pan, not shown, or via an oven during the casting process.
- Melting treatment for example, degasser, filter or grain refiner, be inserted.
- the plug 4 By means of the plug 4, the pouring opening of the pouring tube 3 on the
- the distribution network 3b under the pouring tube also as Known as "Combo Bag” or “Distribution Bag", it distributes the melt evenly into the mold.
- a larger cross section of the pouring opening is provided in comparison with small-format molds. This ensures that with simultaneous continuous casting of different formats an identical withdrawal speed is made possible by lowering the common casting table 6 for all dies.
- Metal level control device the casting cross-section automatically controlled.
- the desired value of the metal level in the molds can be predetermined in time, for example, via a "pouring recipe".
- FIG. 2 shows, in a schematic plan view, three different molds 10, 20, 30, which are distinguished by a broad side 11, 21, 31 of identical length and identical narrow sides 12, 22, 32.
- the narrow sides 12, 22, 32 define the thickness of the stripped metal strand and, according to the invention, have an identical length.
- the thickness of the metal strand essentially determines the cooling behavior of the metal strand and thus the withdrawal speed of the metal strand.
- FIG. 3 shows a schematic sectional view of an exemplary embodiment of a method according to the invention for continuously casting metal strands, in particular rolled bars of aluminum or an alloy, in which the liquid metal 8 is distributed, for example via distributor 2, to a plurality of molds 10, 20, 30 becomes.
- the Kokillenstoffphase begins for all dies 10, 20, 30 at the same
- the depth of the sprue is preferably 100 mm to 150 mm.
- Kokillen lactate corresponds for example to the filling rate during the continuous casting or the continuous casting, in which the metal strand from the mold 10, 20, 30 is deducted by lowering the casting table 6.
- the Narrow sides not shown in FIGS. 3 and 4, have a uniform length of 400 mm to 600 mm.
- FIG. 4 the embodiment of FIG. 3 is now shown during the continuous casting.
- the casting table 6 is lowered depending on the volume of metal flow, with which metal is replenished in the molds, during the continuous casting phase, via the manifold 2 and the nozzle or the pouring tube 3 under
- the metal sensor 7 can constantly measure the metal level of the molten metal or the metal and use it to control the molten metal inflow.
- the metal level of the metal sensor 7 is measured without contact, for example capacitive. But it can also be a non-contact measurement with a laser, with a radar probe or inductively done.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201730787T SI3519124T1 (sl) | 2016-09-27 | 2017-09-27 | Postopek za večkratno litje kovinskih gredic |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16190796 | 2016-09-27 | ||
PCT/EP2017/074497 WO2018060246A1 (de) | 2016-09-27 | 2017-09-27 | VERFAHREN ZUM MEHRFACHGIEßEN VON METALLSTRÄNGEN |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3519124A1 true EP3519124A1 (de) | 2019-08-07 |
EP3519124B1 EP3519124B1 (de) | 2021-03-24 |
Family
ID=57003442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17772720.3A Active EP3519124B1 (de) | 2016-09-27 | 2017-09-27 | Verfahren zum mehrfachgiessen von metallsträngen |
Country Status (6)
Country | Link |
---|---|
US (1) | US10549340B2 (de) |
EP (1) | EP3519124B1 (de) |
JP (1) | JP6634542B2 (de) |
CN (1) | CN109789477B (de) |
SI (1) | SI3519124T1 (de) |
WO (1) | WO2018060246A1 (de) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE891444C (de) | 1942-09-02 | 1953-09-28 | Ver Leichtmetallwerke Gmbh | Vorrichtung zum gleichzeitigen Giessen mehrerer Metallstraenge |
DE860243C (de) * | 1942-11-27 | 1952-12-18 | Ver Leichtmetallwerke Gmbh | Vorrichtung zum gleichzeitigen Giessen mehrerer Straenge |
DE830244C (de) * | 1950-04-25 | 1952-02-04 | Heinrich Josef Baggeler | Vorrichtung zum gleichzeitigen Giessen mehrerer Metallstraenge oder Baender |
US3125440A (en) * | 1960-12-27 | 1964-03-17 | Tlbr b | |
BE757226A (fr) * | 1969-10-08 | 1971-03-16 | Alusuisse | Dispositif pour la coulee verticale continue a plusieurs jets (multiple) de l'aluminium et de ses alliages |
CH639575A5 (de) * | 1979-04-27 | 1983-11-30 | Concast Ag | Verfahren und vorrichtung zum stranggiessen von mehreren straengen. |
DE3224065C2 (de) * | 1982-06-28 | 1984-05-30 | Benteler-Werke Ag Werk Neuhaus, 4790 Paderborn | Verstellbare Stranggießkokille für Vielfachstranggießanlagen |
US4730660A (en) * | 1984-09-05 | 1988-03-15 | Metacon Aktiengesellschaft | Process for casting molten metal into several strands |
DE3538222A1 (de) * | 1985-10-26 | 1987-05-27 | Metacon Ag | Verfahren zum anfahren einer stranggiessanlage mit mehreren straengen |
JPS6333153A (ja) * | 1986-07-28 | 1988-02-12 | Sumitomo Light Metal Ind Ltd | 多連装電磁鋳造における鋳込開始方法 |
JPS63150738U (de) | 1987-03-26 | 1988-10-04 | ||
DE3925939A1 (de) * | 1989-08-03 | 1991-02-07 | Mannesmann Ag | Stranggiessanlage mit einer kokillenoszillationsvorrichtung |
DE4203337C2 (de) * | 1992-02-06 | 1994-07-07 | Vaw Ver Aluminium Werke Ag | Verfahren zum Stranggießen von Metallen |
DE4306943C2 (de) * | 1993-03-05 | 1995-05-18 | Vaw Ver Aluminium Werke Ag | Anfahrkopf für eine Vertikal-Stranggießanlage |
JPH08174169A (ja) | 1994-12-21 | 1996-07-09 | Kawasaki Steel Corp | ツインキャスト型連続鋳造装置の鋳片引抜き装置およびその運転方法 |
EP0855238A1 (de) * | 1997-01-24 | 1998-07-29 | Alusuisse Technology & Management AG | Verfahren zum Vertikalstranggiessen von Metallen |
JP2009226470A (ja) | 2008-03-25 | 2009-10-08 | Kobe Steel Ltd | アルミニウム鋳塊またはアルミニウム合金鋳塊の製造方法 |
NO333382B1 (no) * | 2009-11-06 | 2013-05-21 | Norsk Hydro As | Metallfyllingsarrangement for kontinuerlig stopeutstyr |
RU2550473C2 (ru) * | 2010-10-18 | 2015-05-10 | Норск Хюдро Аса | Затравка литьевого оборудования |
CN102773428B (zh) * | 2012-06-12 | 2014-11-26 | 中冶京诚工程技术有限公司 | 大断面连铸坯的铸造装置及其铸造方法 |
CN203900429U (zh) * | 2014-05-30 | 2014-10-29 | 上海坤孚企业(集团)有限公司 | 一种用于铸锭的铸造平台 |
-
2017
- 2017-09-27 JP JP2019516115A patent/JP6634542B2/ja active Active
- 2017-09-27 EP EP17772720.3A patent/EP3519124B1/de active Active
- 2017-09-27 SI SI201730787T patent/SI3519124T1/sl unknown
- 2017-09-27 WO PCT/EP2017/074497 patent/WO2018060246A1/de active Search and Examination
- 2017-09-27 CN CN201780059834.1A patent/CN109789477B/zh active Active
-
2019
- 2019-03-22 US US16/362,374 patent/US10549340B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN109789477B (zh) | 2021-10-26 |
US10549340B2 (en) | 2020-02-04 |
JP2019532820A (ja) | 2019-11-14 |
US20190217379A1 (en) | 2019-07-18 |
JP6634542B2 (ja) | 2020-01-22 |
EP3519124B1 (de) | 2021-03-24 |
CN109789477A (zh) | 2019-05-21 |
SI3519124T1 (sl) | 2021-08-31 |
WO2018060246A1 (de) | 2018-04-05 |
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