EP0858374B1 - Verfahren und vorrichtung zum führen von strängen einer stranggiessanlage - Google Patents

Verfahren und vorrichtung zum führen von strängen einer stranggiessanlage Download PDF

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Publication number
EP0858374B1
EP0858374B1 EP96945851A EP96945851A EP0858374B1 EP 0858374 B1 EP0858374 B1 EP 0858374B1 EP 96945851 A EP96945851 A EP 96945851A EP 96945851 A EP96945851 A EP 96945851A EP 0858374 B1 EP0858374 B1 EP 0858374B1
Authority
EP
European Patent Office
Prior art keywords
strand
continuous casting
casting device
plate segments
plate
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.)
Expired - Lifetime
Application number
EP96945851A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0858374A2 (de
Inventor
Fritz-Peter Pleschiutschnigg
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0858374A2 publication Critical patent/EP0858374A2/de
Application granted granted Critical
Publication of EP0858374B1 publication Critical patent/EP0858374B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • the invention relates to a method for guiding strands of a continuously pouring Continuous casting plant, in particular a plant for producing thin slabs from steel, with a mold and a strand guide frame provided with a cooling device, wherein the strand is held in shape by a gaseous medium and guided in the direction of the strand pull-out and cooled, and a device for performing the method.
  • Such a method or the device is known from AU-A-49917.
  • the strand routing in slab or ingot continuous casting plants becomes regular performed by rollers arranged below the mold. As far as they have these roles are uncooled, a minimum diameter of about 100 mm and, insofar as they are one Have internal cooling, a diameter of at least about 140 mm. In slab caster, that can assume a slab width of up to 3.5 m come split Rollers with intermediate bearings are used.
  • Spray cooling is regularly used when using uncooled rollers. This The type of spray cooling harbors the risk of uncontrolled cooling of the strand Strand surface cracks can result.
  • the roll diameter in connection with the strand width determines the distance between the individual roles to each other.
  • This roller distance which is a characteristic variable for strand support or strand bulge is to be considered directly the strand quality.
  • the bulging of a strand depends on the casting speed and the distance between the rollers. While standard slabs with a thickness of about 200 mm with a maximum speed of 2.2 m / min. is poured. become Thin slabs with a thickness of about 50 mm with a speed of 6 m / min. poured, with speeds of 8 m / min. be aimed for.
  • the strand shell is made of thin slabs before it emerges the mold until it solidifies compared to strand shells for standard slabs is significantly hotter in the same metallurgical location.
  • the pouring thickness is less and the tendency to bulge and thus to deform of the strand in an uncontrollable manner.
  • plates are also known as strand guide elements.
  • EP 0 107 563 A1 proposes a grid that is below the Mold is arranged and through the free space a cooling medium, for. B. splash water, is sprayed against the strand surface.
  • the invention has therefore set itself the goal of simple strand management to create even for high casting speeds, with structurally simple means enable the production of strands of high surface quality with low wear.
  • the invention achieves this goal by the characterizing features of the method claim 1 and the device claim 5.
  • the strand slides on a gas cushion after leaving the mold, which is placed between plate segments and the strand and becomes its heat indirectly touching it by absorbing the radiant heat from the strand Withdrawn cooling plates.
  • Nitrogen is preferably used as the gaseous medium to be used by the appropriate construction of the plate segments on the strand facing wall keeps it in shape, leads in the strand discharge direction and in addition to absorb the indirect heat (radiation) through the cooling plates the flowing gas is cooled.
  • the strand guide plate segments on the No work to carry (weight) of the strand Furthermore change the specific work in the respective segments or via the metallurgical length from the mold exit to the end of the strand guide.
  • the strand is additionally connected via mechanical means (here essentially Continuous casting rolls) defined by the continuous stand at a predeterminable speed emotional.
  • the rollers can transport or the desired casting speed and / or support and take over or ensure the bending and straightening processes.
  • the speed at the end of the Continuous casting stand arranged role used here since the strand is completely solidified.
  • the drive energies via the gas flow and the continuous casting rollers are arbitrary tunable.
  • the Conveyed strand by the gas flow and by the continuous casting rollers at its speed braked to the target speed.
  • the plate segments essentially consist of a hollow body through which a Cooling medium is preferably passed suction.
  • a network of distribution lines is provided on the side inclined through the line which is a gas, e.g. Nitrogen.
  • the distribution lines are section by section interconnected and connected to a gas production station via manifolds.
  • the individual nozzle openings of the distribution lines can vary be trained. Their distribution will also be according to the amount of work adapted to their location in the strand guide. For example, the number of nozzles and / or the sum of the nozzle openings in the segment over a metallurgical length and width can be functionally changed to at different geometric locations to do different work with the same pressure supply.
  • This distribution of Nozzles in the sense of different performances at the same pressure e.g. per printing system (Segment plate, pneumatic cushion) can be used both transversely and lengthways Casting direction is available. Also, a segment can be different from each other independent pneumatic systems.
  • the nozzles or a part of the nozzles be pointed To give inclination to the casting direction to support the promotion of the strand.
  • This support of the strand conveyance provides the continuous casting speed safe and supports and simplifies the workload between the plate segments arranged pairs of rollers.
  • the plate segments have at least in Edge area a distance from the strand surface, which is a defined leakage of the Gases between the strand and the lip arranged at least in the edge region allows.
  • the plate segments are on actuators, for example piston-cylinder units, connected with which the distance of plate segment and strand and thus the Gas leakage can be predetermined.
  • the wall inclined to the strand is in its design and in the material Built in such a way that it can dissipate a maximum of radiant heat.
  • copper with a relatively small wall thickness to the cooling water arranged in the cooling box of the plate segment absorb the heat.
  • the wall thickness of the strand inclined wall of the plate segments varies in such a way that the Thickness decreases towards the main plate axis.
  • the one facing the strand can also Wall of the segment with a wear-resistant protective layer, such as. B. Nickel and / or chrome coated.
  • the plate segment is constructed from tubes that are meandering are arranged and on the contact lines of the distribution lines for the supply of the gas are introduced.
  • the pipeline Through the pipeline there is the possibility of cooling water perform at high speed and thus the highest possible amount to dissipate radiant heat from the strand.
  • the Line inclined wall of the plate segments in the conveying direction of the line to be concave.
  • the degree of concavity of the wall can be on one start concave mold and in the first segment over all segments of the strand guide be reduced, e.g. to a low concavity or flat surface up to End of the strand guide scaffold, or up to the solidification of the strand.
  • a parallel slab or a slab with the desired one concave profile can be created.
  • the pneumatic working profile can also extend across the segment width For example, different hole thicknesses can be specified. So it is e.g. advantageous, to build up less pneumatic work in the middle of the plate segment, to do justice to the membrane effect of the strand in the middle. On the edge of the strand, i.e. in the edge area, the strand is more dimensionally stable than in the middle.
  • the pneumatic work introduced can be carried out at given strip thicknesses reduced by opening or closing the plate segments in the same gas pressure or be enlarged, i.e. the distance between the plate segments and the strand is varied.
  • This pneumatic work value can be due to the distance between the plate segment parts specified on the top or bottom and for a given slab thickness become.
  • the strand with a desired The casting speed is conveyed pneumatically by the continuous casting machine.
  • the motors of the continuous casters take care of ensuring the exact Target casting speed through additional work, either promotion (Motor operation) or the rollers run in generator operation and brake the slab to the desired target casting speed. If the motor current rises above the specified one Beyond limits, the base speed is corrected pneumatically.
  • Figure 1 shows a continuous caster with a tundish 11 from the liquid Metal is passed through a dip tube 13 into a mold 12.
  • Act in the present case it is an arcuate continuous caster for producing slabs B, in the case of the strand 12 from the vertically aligned mold, with its strand shell W enclosing the swamp S is conveyed out.
  • Below the mold 12 are rolls 21, which are driven by a roller drive 22 and a guide made of plates 30, which consists of individual plate segments 31, is provided.
  • the plate segments 31 are arranged on the top and bottom of the slab B. Between individual plate segments 31, the rollers 21 are arranged.
  • roller drives 22 are connected to a measuring and control device 23.
  • the rollers 21 guiding and driving the strand and the plate segments 31 are surrounded by a housing 61.
  • the housing 61 is via lines 62 for the supply and lines 63 for the return of a gas with a gas cooling system 64 and a gas cleaning system 65 connected.
  • a gas delivery station 49 is provided, through which the gas via gas collecting lines 46 is promoted to the individual plate segments 31.
  • the cooling medium is cooled by a Pump 71 suctioned off via a feed line 72, the individual plate segments 31 fed and returned via a return line 73.
  • FIG. 2 shows the section aa through the continuous casting device with the housing 61, which envelops the plate segments 31 and the slab B.
  • the plate segments 31 are by piston cylinder devices 51 for plate spacing adjustable attached.
  • a cooling medium is supplied to the plate segments 31 via the line 72 and returned via line 73.
  • distribution lines 45 are connected via the collecting line the distribution outside, via a distribution line 43 for the supply in Middle area and also distribution lines 44 for the supply in the intermediate area Gas through orifices 42 in the space between the plate segments 31 and the slab B promoted.
  • the plate segments 31 sit on the slab inclined side, the wall 32, which may have a lip 34 in the edge region.
  • the slab B has the strand shell W in which there is a sump S made of liquid metal located.
  • Figure 3 shows a further section A-A of the plate segments 31, in which the Strand B inclined wall 32 is concave.
  • the wall 32 is double-walled, the one directly assigned to the strand B.
  • Plate 35 made of a highly thermally conductive material, e.g. B. copper is.
  • the copper plate 35 can have a wear-resistant layer 36, for example be coated from nickel or chrome.
  • the wall 32 has a lip 34 in the edge area on.
  • the wall thickness d of the wall 32 can be from the central area to the edge area be trained to be stronger.
  • the gas is supplied via the distribution line 43 and bores 41 to the Muzzle 42.
  • the slab B has the strand shell W which flows around the sump S.
  • the slab B has a hole in the middle.
  • FIG. 4 shows a plate segment 31 which consists of a meandering shape arranged pipe 38 is that with the supply line 72 and the return line 73 is connected.
  • the distribution lines 43, 44, 45 end at the contact line 39 directly on the side inclined towards the slab B.
  • the section B-B is shown, in which the pipes on the Contact line 39 are connected gas-tight and only when the Do not touch distribution lines 43, 44, 45 directly.
  • the mouths 42 of the Distribution lines point into the space between the plate segment 31 and the slab B.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Ropes Or Cables (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Confectionery (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Dairy Products (AREA)
EP96945851A 1995-11-03 1996-10-25 Verfahren und vorrichtung zum führen von strängen einer stranggiessanlage Expired - Lifetime EP0858374B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19542180A DE19542180C1 (de) 1995-11-03 1995-11-03 Verfahren und Vorrichtung zum Führen von Strängen einer Stranggießanlage
DE19542180 1995-11-03
PCT/DE1996/002080 WO1997016272A2 (de) 1995-11-03 1996-10-25 Verfahren und vorrichtung zum führen von strängen einer stranggiessanlage

Publications (2)

Publication Number Publication Date
EP0858374A2 EP0858374A2 (de) 1998-08-19
EP0858374B1 true EP0858374B1 (de) 1999-11-17

Family

ID=7777282

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96945851A Expired - Lifetime EP0858374B1 (de) 1995-11-03 1996-10-25 Verfahren und vorrichtung zum führen von strängen einer stranggiessanlage

Country Status (17)

Country Link
US (1) US20010047857A1 (pt)
EP (1) EP0858374B1 (pt)
JP (1) JP3130051B2 (pt)
KR (1) KR100314994B1 (pt)
CN (1) CN1081499C (pt)
AT (1) ATE186664T1 (pt)
AU (1) AU711139B2 (pt)
BR (1) BR9611287A (pt)
CA (1) CA2236584A1 (pt)
CZ (1) CZ136898A3 (pt)
DE (3) DE19542180C1 (pt)
MX (1) MX9803433A (pt)
PL (1) PL181817B1 (pt)
RU (1) RU2147262C1 (pt)
TR (1) TR199800775T2 (pt)
UA (1) UA43431C2 (pt)
WO (1) WO1997016272A2 (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT406026B (de) * 1998-03-25 2000-01-25 Voest Alpine Ind Anlagen Stranggiessanlage zum kontinuierlichen giessen eines dünnen bandes sowie verfahren hierzu
DE10106252A1 (de) * 2001-02-10 2002-08-14 Sms Demag Ag Strangführung einer Stranggiessanlage sowie Anstellverfahren für deren Rollensegmente
TW200929601A (en) 2007-12-26 2009-07-01 Epistar Corp Semiconductor device
ES2759779T3 (es) * 2011-07-08 2020-05-12 Primetals Technologies Germany Gmbh Procedimiento y aparato para la fabricación de productos metálicos largos en una colada continua
DE102017209731A1 (de) * 2017-06-08 2018-12-13 Sms Group Gmbh Luftkühlung in Stranggießanlagen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2153152A1 (en) * 1971-09-21 1973-05-04 Creusot Loire Continuous casting curved cooling guide - improves casting quality by supporting it on pressurised fluid and rollers
US3773099A (en) * 1971-11-18 1973-11-20 I Rossi Continuous casting of strands using thermal stress reinforcement
AU457394B2 (en) * 1972-12-11 1975-01-07 Battelle Memorial Institute Process and apparatus for continuous casting of metal strands
US3923093A (en) * 1974-05-16 1975-12-02 Armco Steel Corp Universal continuous casting apparatus
FR2364718A1 (fr) * 1976-09-17 1978-04-14 Clesid Sa Dispositif de refroidissement secondaire dans une installation de coulee continue de metal
FR2534166A1 (fr) * 1982-10-08 1984-04-13 Clecim Sa Installation de coulee continue de l'acier

Also Published As

Publication number Publication date
KR100314994B1 (ko) 2002-02-28
DE59603687D1 (de) 1999-12-23
DE19680926D2 (de) 1999-03-11
CN1201412A (zh) 1998-12-09
TR199800775T2 (xx) 1998-07-21
AU1717397A (en) 1997-05-22
WO1997016272A2 (de) 1997-05-09
PL326384A1 (en) 1998-09-14
WO1997016272A3 (de) 1997-10-23
BR9611287A (pt) 1999-09-28
UA43431C2 (uk) 2001-12-17
EP0858374A2 (de) 1998-08-19
KR19990067275A (ko) 1999-08-16
CN1081499C (zh) 2002-03-27
CZ136898A3 (cs) 1998-10-14
JPH11504865A (ja) 1999-05-11
DE19542180C1 (de) 1997-04-03
AU711139B2 (en) 1999-10-07
ATE186664T1 (de) 1999-12-15
JP3130051B2 (ja) 2001-01-31
CA2236584A1 (en) 1997-05-09
RU2147262C1 (ru) 2000-04-10
US20010047857A1 (en) 2001-12-06
PL181817B1 (pl) 2001-09-28
MX9803433A (es) 1998-09-30

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