EP3419778A1 - Düsenreihenanordnung und düsenfeld zum einbau in rollenspalte zwischen zwei strangführungsrollen - Google Patents
Düsenreihenanordnung und düsenfeld zum einbau in rollenspalte zwischen zwei strangführungsrollenInfo
- Publication number
- EP3419778A1 EP3419778A1 EP17706475.5A EP17706475A EP3419778A1 EP 3419778 A1 EP3419778 A1 EP 3419778A1 EP 17706475 A EP17706475 A EP 17706475A EP 3419778 A1 EP3419778 A1 EP 3419778A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- nozzles
- strand
- strand guide
- roller gap
- 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
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
- B22D11/1246—Nozzles; Spray heads
-
- 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
Definitions
- the invention relates to a nozzle row arrangement for installation in a roller gap between two adjacent in a casting direction strand guide rollers in a strand guide in a continuous casting.
- the continuous casting plant is used for pouring liquid metal into a cast strand, which is guided within the strand guide between strand guide rollers.
- the nozzle array consists of a plurality of nozzles for applying coolant to the casting strand.
- the invention further relates to a nozzle array, which is a plurality of nozzle array arrangements, which in a plurality of
- roller gaps are arranged in the strand guide.
- coolant nozzles are well known, such. B. from German Patent Application DE 10 2009 005 679 A1.
- the nozzles can be either 1-fluid nozzles or 2-fluid nozzles per roller gap.
- the 1-fluid nozzle applies only a single coolant to the casting strand, while the 2-fluid nozzles are designed to mix two coolants, typically air and water, previously mixed in a mixing chamber were sprayed onto the cast strand.
- German Auslegeschrift 26 36 666 discloses nozzles for coolant in a series arrangement, wherein the nozzles are arranged there symmetrically to a plant center or strand central axis of the strand guide.
- a continuous casting plant typically comprises a mold and a strand guide arranged downstream of the mold in the casting direction with a plurality of
- Coolant flow in a wide control range must be adjustable. This requirement may arise in particular if the continuous casting plant is designed for a large product spectrum, ie. H. for the casting of casting strands of very different widths or different steel grades with widely varying casting speeds.
- 1 - Substance nozzles are much more limited in their control ratio than 2-component nozzles, and therefore they are suitable for installation in
- Continuous casting plants that are designed for a wide range of products, at least not suitable on their own.
- the invention is based on the object, a known nozzle row arrangement and a known nozzle array for installation in roller gaps between
- Nozzle row arrangements characterized in that the further nozzles as Multi-substance nozzles are formed whose control ratio is greater than the control ratio of the at least one 1-nozzle.
- a multi-substance nozzle preferably means a 2-material nozzle, which typically with a gaseous material M2, z. As air or nitrogen, and in addition with a liquid M1, z. B. be operated with water.
- control ratio also called the control range
- the control ratio, also called the control range, of a nozzle indicates how far the volume flow of the coolant can be lowered in relation to a nozzle-specific nominal or maximum value specified by the manufacturer, without the spray pattern or the jet cone suffering substantially or even
- the claimed nozzle row arrangement provides that in a central region of the roller gap only 1-fluid nozzle are installed, while right and left of the central region, d.
- Multi-substance nozzles are installed in the edge regions of the casting strand. Due to the sprayed from the multi-substance nozzles
- Coolant mixture of, for example, a gaseous and a liquid coolant the control range of the multi-fluid nozzles is typically significantly greater than the control range of the 1-fluid nozzles.
- the purchase and operation of the multi-fluid nozzles are significantly more expensive than the operation of the 1-fluid nozzle, because the provision of the gaseous coolant, for. B. compressed air is many times more expensive than the provision of water as a coolant.
- the claimed nozzle row arrangement is preferably used in continuous casting plants with the following specifics:
- Nozzle distance to the slab 50 - 1000 mm
- Spray angle width 30 - 160 degrees
- Spray angle depth 1 - 120 degrees
- Mixture media water / air; Water / nitrogen
- Nozzle row arrangement are designed for a same maximum heat-temperature-Coefficient HTC value, regardless of whether it is 1-material or multi-component nozzles. Therefore, this advantageous condition applies in particular in the transition region from the central region G to the edge regions, if there 1-substance and multi-component nozzles are arranged adjacent to each other.
- the nozzle row arrangement according to the invention can be used for cooling the upper side or the lower side of a cast strand.
- the above object of the invention is further achieved by a nozzle field for installation in roller gaps between a plurality of strand guide rollers arranged adjacent in the casting direction according to claim 5.
- the advantages of this solution correspond to the advantages mentioned above with respect to the nozzle row arrangement.
- the entire spray width and thus preferably also the number of nozzles per roll gap, decreases from outside to inside in the casting direction.
- first and second roll nip are not necessarily to be understood as adjacent roll nips.
- FIG. 1 shows a continuous casting plant according to the prior art
- FIG. 2 shows a nozzle row arrangement according to the invention
- FIG. 3 shows different control ratios of 1-substance and multi-substance
- Figure 4 shows a nozzle array according to the invention.
- FIG. 1 shows a conventional continuous casting plant 200, which essentially consists of a continuous casting mold 250 and one of the continuous casting molds
- Strand guide 210 consists. After filling a liquid metal,
- a bath level 252 forms within the mold.
- the liquid metal is cooled in the mold 250 by means of a primary cooling (not shown) so that a cast strand 300 is formed there.
- the cast strand is initially fluid in its interior; However, it forms on its outside a solidified solid strand shell 310.
- the guide takes place in Figure 1 from top to bottom, ie here in the casting R.
- the cast strand 300 is supplied with coolant (secondary cooling). This is done by means of nozzles in the form of nozzle row assemblies 100 in the roller gaps 212 between two in
- Casting R adjacent strand guide rollers 214 are arranged. As a result of the application of coolant, the cast strand 300 solidifies continuously during its guidance through the strand guide 210, until it finally completely solidifies.
- FIG. 2 shows a cross-section through a roller gap 212.
- the casting strand 300 can be seen in the partially solidified state, that is to say the casting strand 300 is in the partially solidified state. H. with a solidified
- the strand guide is configured to guide the casting strand 300 with format widths between a minimum format width and a maximum format width.
- the arrangement of the 1 - substance nozzles is limited to the center region G. For the width of the
- the center region G extends symmetrically to a plant center GO of the strand guide 210 in the roll gap 212.
- the 1-material nozzles 110 are also within the center region G.
- the 2-material nozzle is operated with two coolants M1, M2.
- the first coolant M1 is typically liquid, e.g. Water.
- the second coolant M2 is typically gaseous, e.g. Air. That's why you are
- Cooling effect on the edges is influenced not only by the liquid cooling medium, but in addition by the gaseous medium, so the overall cooling capacity of the 2-fluid nozzles in the edge regions, however, is usually deliberately set much lower than that of the 1 - Substance nozzles 1 10 in the central region G to be provided cooling capacity. This is because, as stated, the edge portions of the cast strand 300 must be "kept warm” to avoid cracking Therefore, the 2-material nozzles provided for the edge region may also be designed for a smaller maximum HTC value than the others Nozzles of the nozzle row.
- FIG. 3 illustrates the different control ratios of 1-substance and 2-substance nozzles. If both nozzles are designed for the same maximum cooling capacity (Heat-Temperature-Coefficient HTC), then the 2-material nozzle advantageously enables, unlike the 1-material nozzle, the setting of significantly lower cooling capacities than the 1-material nozzle. Jet. Based on these Feature recommend 2-fluid nozzle for use in continuous casting, which are designed for a wide range of different grades of steel.
- HTC Heat-Temperature-Coefficient
- a specific cooling capacity specified by the manufacturer corresponds approximately to one
- FIG. 4 shows a nozzle field according to the invention, which consists of a plurality of nozzle row arrangements.
- the nozzle field 400 comprises in particular a first nozzle row arrangement 100-1 in a first roll gap 212 and a second nozzle row arrangement 100-2 in a second roll gap, which is arranged downstream of the first roll gap in the casting direction R in FIG.
- the nozzle array 5 shown in FIG. 4 comprises nozzle rows, the first, second and third nozzle row arrangement according to the present invention being shown by way of example Invention are formed.
- Rolling gap 212 in the casting direction R are increasingly lower. As the overall spray width becomes smaller, the number of nozzles per roller gap also decreases from outside to inside, as can be seen in FIG. The decrease in the number of nozzles per roller gap, for example, finally goes so far that in the fourth roller gap only three 1-fluid nozzle and in a fifth roller gap finally only a 1-fluid nozzle in the central region G are arranged / is ,
- the nozzle row arrangements in the fourth and fifth roll gaps no longer correspond to the nozzle row arrangement according to the present invention, because right and left outside of the central area G, no 2-substance nozzles are arranged any more.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016202880 | 2016-02-24 | ||
| DE102016215977.1A DE102016215977A1 (de) | 2016-02-24 | 2016-08-25 | Düsenreihenanordnung und Düsenfeld zum Einbau in Rollenspalte zwischen zwei Strangführungsrollen |
| PCT/EP2017/053961 WO2017144481A1 (de) | 2016-02-24 | 2017-02-21 | Düsenreihenanordnung und düsenfeld zum einbau in rollenspalte zwischen zwei strangführungsrollen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3419778A1 true EP3419778A1 (de) | 2019-01-02 |
| EP3419778B1 EP3419778B1 (de) | 2019-08-07 |
Family
ID=59522257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17706475.5A Active EP3419778B1 (de) | 2016-02-24 | 2017-02-21 | Düsenreihenanordnung und düsenfeld zum einbau in rollenspalte zwischen zwei strangführungsrollen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3419778B1 (de) |
| DE (1) | DE102016215977A1 (de) |
| WO (1) | WO2017144481A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983926A (zh) * | 2017-12-29 | 2018-05-04 | 南京钢铁股份有限公司 | 一种方坯连铸机二冷喷嘴及其布置方法 |
| DE102019207789A1 (de) | 2019-05-28 | 2020-12-03 | Sms Group Gmbh | Verfahren und Vorrichtung zum Stranggießen |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2636666C2 (de) | 1976-08-14 | 1978-06-29 | Demag Ag, 4100 Duisburg | Spritzdüsen-Anordnung für Metall-, insbesondere für StahlstranggieBanlagen für extrem breite Stahlbrammen |
| DE102008004911B4 (de) * | 2008-01-18 | 2025-02-13 | Sms Group Gmbh | Verfahren zur Regelung der Sekundärkühlung von Stranggießanlagen |
| DE102009010251A1 (de) * | 2008-10-01 | 2010-04-08 | Sms Siemag Aktiengesellschaft | Vorrichtung und Verfahren zur Sekundärkühlung in einer Stranggießanlage |
| DE102009005679A1 (de) | 2009-01-22 | 2010-07-29 | Sms Siemag Aktiengesellschaft | Stranggießanlage mit Spritzdüsenanordnung |
| DE102009034847A1 (de) * | 2009-07-27 | 2011-02-03 | Sms Siemag Ag | Vorrichtung und Verfahren zur geregelten Sekundärkühlung einer Stranggießanlage |
-
2016
- 2016-08-25 DE DE102016215977.1A patent/DE102016215977A1/de not_active Withdrawn
-
2017
- 2017-02-21 EP EP17706475.5A patent/EP3419778B1/de active Active
- 2017-02-21 WO PCT/EP2017/053961 patent/WO2017144481A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017144481A1 (de) | 2017-08-31 |
| EP3419778B1 (de) | 2019-08-07 |
| DE102016215977A1 (de) | 2017-08-24 |
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