EP0620063B1 - Device for producing a steel strip by use of continuous casting - Google Patents
Device for producing a steel strip by use of continuous casting Download PDFInfo
- Publication number
- EP0620063B1 EP0620063B1 EP94105298A EP94105298A EP0620063B1 EP 0620063 B1 EP0620063 B1 EP 0620063B1 EP 94105298 A EP94105298 A EP 94105298A EP 94105298 A EP94105298 A EP 94105298A EP 0620063 B1 EP0620063 B1 EP 0620063B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deforming
- spray nozzles
- rollers
- slag
- strand
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 238000009749 continuous casting Methods 0.000 title claims abstract description 5
- 239000007921 spray Substances 0.000 claims abstract description 11
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- 238000005096 rolling process Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 2
- YVGGHNCTFXOJCH-UHFFFAOYSA-N DDT Chemical compound C1=CC(Cl)=CC=C1C(C(Cl)(Cl)Cl)C1=CC=C(Cl)C=C1 YVGGHNCTFXOJCH-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
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
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- B22D11/1246—Nozzles; Spray heads
Definitions
- the invention relates to a system for producing a steel strip by deforming a cast steel strand consisting of a Continuous casting machine with an oscillating continuous mold cooled walls and a forming roller arranged at the mold outlet having deformation device for the steel strand.
- a system of this type has become known from EP-B1-0 326 190.
- This allows a thicker, void-free, in its thickness compared to the steel strand leaving the mold reduced strand with one also for further processing achieve fine-grained cast structure.
- the squeeze and press rolls of the Deforming device arranged at the mold outlet press the Steel strand together in such a way that the inner walls of the weld strand shells that have already solidified. Because of the small thickness of the emerging from the oscillating mold Steel strand and the subsequent reduction in thickness of the not solidified steel strand in the deformation device as well as at least one of these downstream rolling stands steel strands with a significantly less than 25 mm reach lying thickness.
- the invention is therefore based on the object in a generic Ensure that surface defects of the Steel strips due to one of the deforming rollers Have detoxifying and descaling devices avoided.
- the spray nozzles are arranged in a box-like housing are.
- the housing can preferably be resilient against the deforming rollers be employed.
- the enclosure of the spray nozzles ensures that the press water and the dissolved slag and scale particles are not get back onto the belt surface and thus into the roller gap. It can be an encapsulated removal of the press water and the Reach particles.
- the resilient employment of Housing that the roller surfaces in front and behind the nozzles are stripped so that on the surfaces of the deforming rollers adhering, not yet detached from the press water jets Scale and slag particles removed at this point at the latest and will no longer get onto the belt surface can.
- An alternative or additional measure provides that the spray nozzles the water as well as the scale and slag particles, internals preferably designed as discharge plates that follow the forming rollers in the direction of strand extraction, that is, are arranged below the rollers. Means of the discharge plates, the water and the contained Collect particles detached from the rollers and from the roller area remove before they fall on the rollers below or can get onto the belt surface again.
- box-like housings 6 are over the length of the squeeze and Press rolls 3, 4 distributed on the side facing away from the strand 5
- Stripped scale and Slag particles fall on internals designed as discharge plates 9, arranged from the steel strand 5 inclined to the outside and therefore the particles from the strand and machine area lead away. If the housings 6 were dispensed with, the Abströmbleche 9 also be sprayed away.
- the housings 6 and / or the outflow plates 9 thus ensure that the sprayed press water and the dissolved slag and Scale particles do not reappear on the surface of the steel strand 5 and get into the nips of the squeeze and press rollers 3, 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Nozzles (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Die Erfindung betrifft eine Anlage zum Herstellen eines Stahlbandes durch Verformen eines gegossenen Stahlstranges, bestehend aus einer Stranggießmaschine mit einer oszillierenden Durchlaufkokille mit gekühlten Wänden und einer am Kokillenauslauf angeordneten, Verformrollen aufweisenden Verformungsvorrichtung für den Stahlstrang.The invention relates to a system for producing a steel strip by deforming a cast steel strand consisting of a Continuous casting machine with an oscillating continuous mold cooled walls and a forming roller arranged at the mold outlet having deformation device for the steel strand.
Eine Anlage dieser Art ist durch die EP-B1-0 326 190 bekanntgeworden. Damit läßt sich ein dichter, lunkerfreier, in seiner Dicke gegenüber dem die Kokille verlassenden Stahlstrang wesentlich reduzierter Strang mit einem zudem für die Weiterverarbeitung feinkörnigem Gußgefüge erreichen. Die Quetsch- und Preßrollen der am Kokillenauslauf angeordneten Verformungseinrichtung drücken den Stahlstrang dabei derart zusammen, daß die inneren Wandungen der bereits verfestigten Strangschalen miteinander verschweißen. Wegen der geringen Dicke des aus der oszillierenden Kokille austretenden Stahlstranges und der anschließenden Dickenreduzierung des noch nicht durcherstarrten Stahlstranges in der Verformungseinrichtung sowie mindestens einem dieser nachgeordneten Walzgerüste, lassen sich ohne weiteres Stahlstränge mit einer wesentlich unter 25 mm liegenden Dicke erreichen. A system of this type has become known from EP-B1-0 326 190. This allows a thicker, void-free, in its thickness compared to the steel strand leaving the mold reduced strand with one also for further processing achieve fine-grained cast structure. The squeeze and press rolls of the Deforming device arranged at the mold outlet press the Steel strand together in such a way that the inner walls of the weld strand shells that have already solidified. Because of the small thickness of the emerging from the oscillating mold Steel strand and the subsequent reduction in thickness of the not solidified steel strand in the deformation device as well as at least one of these downstream rolling stands steel strands with a significantly less than 25 mm reach lying thickness.
Wie sich allerdings herausgestellt hat, bauen sich auf den Quetsch- und Preßrollen Schlacke und Zunder auf. Dadurch entstehen auf den Oberflächen der in einer solchen Anlage hergestellten Bänder Schlacken- und Zundermulden, die in der nachgeschalteten Hochumformung, das heißt in dem Walzgerüst auch nicht beseitigt werden können. Die Auswertung von Bandabschnitten mit gezielten Nothalt hat gezeigt, daß beim Durchlauf des gegossenen Stahlstranges durch die Verformungseinrichtung Schlacke und Zunder im Quetsch- bzw. Preßrollenspalt eingewalzt werden.As it turned out, however, build on the squeeze and Press rolls of slag and scale. This creates on the Surfaces of the strips produced in such a plant Slag and scale troughs in the downstream high forming, that is, it cannot be removed in the rolling stand either can. The evaluation of belt sections with a targeted emergency stop has shown that when passing through the cast steel strand the forming device slag and scale in the crushing or Press roll nip are rolled.
Es ist deshalb versucht worden, den gegossenen Stahlstrang noch vor dessen Eintritt in die Quetsch- und Preßrollen zu entzundern und zu -schlacken. Entschlackungs- und Entzunderungsversuche mit einem stationären Turborotor haben ergeben, daß sich die Bandoberfläche beim Einsatz von Preßwasser mit Drücken von > 200 bar vollständig entschlacken und entzundern lassen. Dabei muß sichergestellt werden, daß das Preßwasser sowie die gelösten Schlacken- und Zunderpartikel vollständig abgesaugt werden, um Oberflächenfehler zu vermeiden. Dies erfordert einen großen konstruktiven Aufwand, einen hohen Wartungsaufwand sowie hohe Betriebskosten für die Entsorgung des Preßwassers und der gelösten Schlacken- und Zunderpartikel.An attempt has therefore been made to pre-cast the cast steel strand descaling its entry into the squeeze and press rolls and to slag. Detox and descaling attempts with one stationary turbo rotor have shown that the strip surface when using press water with pressures of> 200 bar completely purify and descaling. It must be ensured that the press water as well as the dissolved slag and scale particles be sucked off completely to avoid surface defects. This requires a great deal of design effort, a high one Maintenance costs and high operating costs for the disposal of the Press water and the dissolved slag and scale particles.
Der Erfindung liegt daher die Aufgabe zugrunde, bei einer gattungsgemäßen Anlage sicherzustellen, daß sich Oberflächenfehler der Stahlbänder aufgrund einer den Verformrollen zugeordneten Entschlackungs- und Entzunderungsvorrichtung vermeiden lassen.The invention is therefore based on the object in a generic Ensure that surface defects of the Steel strips due to one of the deforming rollers Have detoxifying and descaling devices avoided.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß Spritzdüsen beim gießen an der von dem Strang abgewandten Seite auf die Verformrollen gerichtet sind. Wie herausgefunden wurde, lassen sich durch das gezielte Aufspritzen des Preßwassers direkt auf die Verformrollen sämtliche der vorgenannten Nachteile überraschend beseitigen. Die hohe Auftreffenergie der Wasserstrahlen des aufgespritzten Preßwassers bringt es mit sich, daß sowohl das Wasser als auch Schlacken- und Zunderpartikel von der Oberfläche gelöst werden und somit nicht mehr in den Rollenspalt gelangen.This object is achieved in that spray nozzles while pouring on the side facing away from the strand onto the shaping rollers are directed. As has been found, the targeted spraying of the press water directly onto the forming rollers Surprisingly eliminate all of the aforementioned disadvantages. The high impact energy of the water jets of the sprayed press water brings with it that both the water and slag and Scale particles are detached from the surface and thus no longer get into the roller gap.
Nach einer bevorzugten Ausgestaltung der Erfindung wird vorgeschlagen, daß die Spritzdüsen in einer kastenartigen Einhausung angeordnet sind. Die Einhausung kann vorzugsweise federnd gegen die Verformrollen angestellt sein.According to a preferred embodiment of the invention, it is proposed that that the spray nozzles are arranged in a box-like housing are. The housing can preferably be resilient against the deforming rollers be employed.
Aufgrund der Einhausung der Spritzdüsen wird sichergestellt, daß das Preßwasser und die gelösten Schlacken- und Zunderpartikel nicht wieder auf die Bandoberfläche und damit in den Rollenspalt gelangen. Es läßt sich ein abgekapselter Abtransport des Preßwassers und der Partikel erreichen. Schließlich bewirkt die federnde Anstellung der Einhausung, daß die Rollenoberflächen vor und hinter den Düsen abgestreift werden, so daß die an den Oberflächen der Verformrollen anhaftenden, von den Preßwasserstrahlen noch nicht abgelösten Zunder- und Schlackenpartikel spätestens zu diesem Zeitpunkt entfernt werden und somit nicht mehr auf die Bandoberfläche gelangen können.The enclosure of the spray nozzles ensures that the press water and the dissolved slag and scale particles are not get back onto the belt surface and thus into the roller gap. It can be an encapsulated removal of the press water and the Reach particles. Finally, the resilient employment of Housing that the roller surfaces in front and behind the nozzles are stripped so that on the surfaces of the deforming rollers adhering, not yet detached from the press water jets Scale and slag particles removed at this point at the latest and will no longer get onto the belt surface can.
Eine alternative oder ergänzende Maßnahme sieht vor, daß den Spritzdüsen das Wasser sowie die Zunder- und Schlackenpartikel abfördernde, vorzugsweise als Abströmbleche ausgebildete Einbauten zugeordnet sind, die den Verformrollen in Strang-Ausziehrichtung nachgeschaltet, das heißt jeweils unterhalb der Rollen angeordnet sind. Mittels der Abströmbleche lassen sich das Wasser und die darin enthaltenen, von den Rollen abgelösten Partikel sammeln und aus dem Rollenbereich abfördern, bevor sie auf die unterhalb angeordneten Rollen fallen bzw. erneut auf die Bandoberfläche gelangen können. An alternative or additional measure provides that the spray nozzles the water as well as the scale and slag particles, internals preferably designed as discharge plates that follow the forming rollers in the direction of strand extraction, that is, are arranged below the rollers. Means of the discharge plates, the water and the contained Collect particles detached from the rollers and from the roller area remove before they fall on the rollers below or can get onto the belt surface again.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel des Gegenstandes der Erfindung anhand der Zeichnung näher erläutert ist.Further features and advantages of the invention result from the Claims and the following description in which an embodiment the object of the invention with reference to the drawing is explained in more detail.
Von der Darstellung der als solchen bekannten Anlage zum Herstellen
von gemäß dem Ausführungsbeispiel dünnen Stahlbändern aus gegossenen
Stahlsträngen ist verzichtet worden, und in der einzigen Figur ist
in schematischer Form eine am Auslauf einer Kokille 1 nachgeschaltete
Verformungsvorrichtung 2 gezeigt, die hier als Verformrollen
obere, im Durchmesser kleinere Quetschrollen 3 und untere, im
Durchmesser größere Preßrollen 4 aufweist. Die Quetsch- und Preßrollen
3, 4 drücken den aus der Kokille 1 ausgeförderten Stahlstrang
5, der in seinem Kern noch flüssig ist, derart zusammen, daß die
inneren Wandungen der bereits verfestigten Strangschale miteinander
verschweißen; gleichzeitig reduzieren sie die Dicke des Stahlstranges
5, bevor dieser in einer einstufigen Hochumformung in einem
nachgeschalteten Walzgerüst auf seine Enddicke reduziert wird.From the representation of the plant known as such for manufacturing
of cast steel strips according to the embodiment
Steel strands have been dispensed with, and is in the only figure
in a schematic form downstream of a mold 1 at the
In kastenartigen Einhausungen 6 sind über die Länge der Quetsch- und
Preßrollen 3, 4 verteilt, an den von dem Strang 5 abgewandten
Seiten mehrere Spritzdüsen 7 angeordnet, die Preßwasser unter hohem
Druck gezielt auf die Rollenoberflächen aufspritzen und die von der
Oberfläche des Stahlstranges 5 von den Quetsch- und Preßrollen 3,
4 abgenommenen Zunder- und Schlackenpartikel von den Rollen ablösen.
Sollten trotzdem noch Rückstände bzw. Partikel an den Rollenoberflächen
haften bleiben, so werden diese von den Einhausungen 6
abgestreift, die mittels Druckfedern 8 gegen die Rollenoberflächen
angestellt sind und folglich vor und hinter den Spritzdüsen 7 mit
ihren den Rollen anliegenden Gehäusekanten einen Abstreifeffekt
ausüben. Mittels der Gehäusekanten abgestreifte Zunder- und
Schlackenpartikel fallen auf als Abströmbleche 9 ausgebildete Einbauten,
die von dem Stahlstrang 5 nach außen geneigt verlaufend angeordnet
sind und die Partikel somit aus dem Strang- und Maschinenbereich
wegleiten. Bei Verzicht auf die Einhausungen 6 könnte über die
Abströmbleche 9 außerdem das Spritzwasser abgefördert werden.In box-like housings 6 are over the length of the squeeze and
Press rolls 3, 4 distributed on the side facing away from the strand 5
Sides several spray nozzles 7 arranged, the press water under high
Spray pressure onto the roller surfaces and the pressure from the
Surface of the steel strand 5 from the squeeze and press rolls 3,
Detach 4 removed scale and slag particles from the rolls.
Should there still be residues or particles on the roller surfaces
remain stuck, these are from the housings 6
stripped by means of
Die Einhausungen 6 und/oder die Abströmbleche 9 gewährleisten damit, daß das aufgespritzte Preßwasser und die gelösten Schlacken- und Zunderpartikel nicht wieder auf die Oberfläche des Stahlstranges 5 und in die Rollenspalte der Quetsch- und Preßrollen 3, 4 gelangen.The housings 6 and / or the outflow plates 9 thus ensure that the sprayed press water and the dissolved slag and Scale particles do not reappear on the surface of the steel strand 5 and get into the nips of the squeeze and press rollers 3, 4.
Claims (5)
- Plant for the production of a steel strip by deforming a continuously cast steel strand, consisting of a continuous casting machine with an oscillating continuous flow chill mould with cooled walls and a deforming device, which is arranged at the chill mould outlet and comprises deforming rolls, for the steel strand, characterised thereby that spray nozzles (7) are during casting directed onto the deforming rolls (3, 4) at the side remote from the strand (5).
- Plant according to claim 1, characterised thereby that the spray nozzles (7) are arranged in a box-like housing (6).
- Plant according to claim 2, characterised thereby that the housing (6) is resiliently placed against the deforming rollers (3,4).
- Plant according to claim 1, characterised thereby that the spray nozzles (7) are associated with components conveying away water as well as scale and slag.
- Plant according to claim 4, characterised thereby that the components are constructed as downflow guide plates (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4312277 | 1993-04-15 | ||
| DE4312277A DE4312277A1 (en) | 1993-04-15 | 1993-04-15 | Plant for producing a steel strip from a cast steel strand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0620063A1 EP0620063A1 (en) | 1994-10-19 |
| EP0620063B1 true EP0620063B1 (en) | 1998-02-25 |
Family
ID=6485511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94105298A Expired - Lifetime EP0620063B1 (en) | 1993-04-15 | 1994-04-06 | Device for producing a steel strip by use of continuous casting |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0620063B1 (en) |
| AT (1) | ATE163376T1 (en) |
| CA (1) | CA2121011A1 (en) |
| DE (2) | DE4312277A1 (en) |
| ES (1) | ES2113007T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10325955A1 (en) | 2003-06-07 | 2004-12-23 | Sms Demag Ag | Process and plant for producing steel products with the best surface quality |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT314752B (en) * | 1971-04-30 | 1974-04-25 | Voest Ag | Continuous caster for slabs |
| DE3624794A1 (en) * | 1986-07-22 | 1988-02-04 | Mannesmann Ag | Device for continuous descaling |
| DE4010963A1 (en) * | 1990-04-05 | 1991-10-10 | Schloemann Siemag Ag | Continuous cast metal cleaner - has scrapers on both sides of metal under the die to detach scale and slag |
| DE4123956C2 (en) * | 1991-07-19 | 1994-07-21 | Thyssen Stahl Ag | Process and plant for producing a metal strand by casting |
-
1993
- 1993-04-15 DE DE4312277A patent/DE4312277A1/en not_active Withdrawn
-
1994
- 1994-04-06 AT AT94105298T patent/ATE163376T1/en active
- 1994-04-06 ES ES94105298T patent/ES2113007T3/en not_active Expired - Lifetime
- 1994-04-06 EP EP94105298A patent/EP0620063B1/en not_active Expired - Lifetime
- 1994-04-06 DE DE59405282T patent/DE59405282D1/en not_active Expired - Fee Related
- 1994-04-11 CA CA002121011A patent/CA2121011A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CA2121011A1 (en) | 1994-10-16 |
| EP0620063A1 (en) | 1994-10-19 |
| ES2113007T3 (en) | 1998-04-16 |
| DE4312277A1 (en) | 1994-10-20 |
| ATE163376T1 (en) | 1998-03-15 |
| DE59405282D1 (en) | 1998-04-02 |
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