EP1214163A1 - Bandgiessmaschine zur erzeugung eines metallbandes - Google Patents
Bandgiessmaschine zur erzeugung eines metallbandesInfo
- Publication number
- EP1214163A1 EP1214163A1 EP00962506A EP00962506A EP1214163A1 EP 1214163 A1 EP1214163 A1 EP 1214163A1 EP 00962506 A EP00962506 A EP 00962506A EP 00962506 A EP00962506 A EP 00962506A EP 1214163 A1 EP1214163 A1 EP 1214163A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- housing
- machine according
- belt
- casting machine
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 111
- 239000002184 metal Substances 0.000 title claims abstract description 48
- 230000001681 protective effect Effects 0.000 claims abstract description 19
- 239000011261 inert gas Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- 229910052786 argon Inorganic materials 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 6
- 238000007664 blowing Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0697—Accessories therefor for casting in a protected atmosphere
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
Definitions
- the invention relates to a strip casting machine for producing a metal strip, with two casting tubes arranged side by side, forming a casting gap, which are provided with side seals on the front side, rotatably mounted on a machine stand and are driven by at least one motor, both of which are between these casting tubes and the side seals at least one pouring tube or the like metal melt which can be filled and also the metal strip emerging between these pouring tubes through the casting gap formed is sealed by a protective gas.
- a box-shaped container is provided for sealing the solidified metal strip emerging between the casting rolls, the wall of which extends to the lower outer casing of the respective casting roll , and a seal is generated by a sealing element.
- a seal is relatively complex both in terms of construction and in terms of maintenance and causes undesired contact of the sealing element with the rotating casting roller.
- Japanese Patent Laid-Open JP 62-77 151 A describes a two-roll band casting machine in which the tundish with immersion tube, the casting rolls and the cooling device for the cast band are surrounded by a common housing.
- the housing In order to prevent oxidation of the molten metal and the metal strip, the housing is first evacuated and then inerted, for example, with argon.
- Another longitudinal housing inertized in the same way is arranged below the common housing. Because of the extraordinarily large volume of the common housing, it is too time-consuming to evacuate and the filling with an inert gas is too expensive. Both do not allow economical casting operation and short maintenance times between the casting sequences.
- Japanese Patent Laid-Open JP 3-291135 also shows a common, voluminous housing for the casting rolls and the tundish with a dip tube.
- the problem of such a large housing in the case of evacuation and inerting has previously been described in the two-roll belt casting machine according to JP 62-77 151 A.
- a gas seal has been chosen consisting of blowing and suction nozzles arranged in the area of the lower housing opening. The nozzles blowing the sealing gas against the metal strip are arranged inside the housing, the nozzles sucking off the sealing gas are arranged outside the housing. Measures for economical evacuation and rapid inerting of the cast roller housing are not mentioned.
- the document WO 94/02269 deals with the sealing of the casting space filled with molten metal between two casting pipes of a strip casting machine.
- two sealing chambers are provided.
- One chamber is filled with argon and contains the casting chamber, the other with air or an inert gas chamber surrounds the inner argon chamber and seals against the surrounding atmosphere.
- Both the argon chamber and the air chamber have chamber walls with sealing strips that rest on the outer surface of the casting rolls.
- the argon chamber has a pressure which is equal to or slightly higher than the pressure in the air chamber, so that the inert gas atmosphere in the argon chamber is maintained even in the event of possible leaks.
- the outer frame of the air chamber has further sealing strips which rest against the bottom of the distributor vessel.
- This is intended to render the flowing molten metal inert from the tundish to the casting chamber of the casting rolls.
- This sealing system is susceptible to wear due to the sealing strips placed on the sheaves of the casting rolls and entails the risk that, for example, the argon chamber emits high leakages to the surrounding air chamber, the inerting of the casting chamber is endangered and the quality of the cast strip is reduced , In addition, the loss of leakage of the expensive argon is economically unacceptable.
- the present invention was based on the object of creating a strip casting machine of the type mentioned at the outset, with which a perfect seal against the ambient air of both the metal bath or the produced metal strip and the casting rolls and furthermore simplified operation and repair of the Machine is enabled.
- the object is achieved according to the invention in that the pouring tubes with the machine stand and the side seals are surrounded all around by a closable, possibly multi-part housing, which has a respective opening on its top for the pouring tube or the like extending between the pouring rollers and on the underside has an opening for the emerging metal strip, these openings being sealed and the housing inside being filled with a protective gas, preferably an inert gas, during casting.
- a protective gas preferably an inert gas
- the closable housing is provided on the upper side with at least one removable, approximately horizontally lying door, which in the closed state is located directly above the casting pipes.
- FIG. 2 shows a schematic top view of the strip casting machine according to FIG. 1 with the housing shown in section
- FIG. 3 shows a partial section of the housing on the top of a casting roll of the strip casting machine according to FIG. 1,
- FIG. 1 and 2 show a strip casting machine 20 of a metal strip 15 that can be produced in a continuous casting process, in particular a steel strip.
- This band casting machine 20 stands on a stage 12 and is supplied with molten metal 16 by a distributor vessel 18 above it, as is known in conventional continuous casting plants.
- the distributor vessel 18 expediently has a pouring opening 17 which can be closed with a stopper 19 or the like and has a pouring tube 13 which extends between the pouring tubes 22, 24 and through which the melt can flow off.
- this band casting machine 20 has two casting ducts 22, 24, which are arranged essentially parallel to one another and have an approximately horizontal axis of rotation, each of which is provided with a side seal 25 on both end faces, as a result of which an all-round opening 26 with a casting gap 15 'which is open towards the bottom is formed ,
- the casting tubes 22, 24 are rotatably supported on both sides on an indicated machine stand 32 and driven by a motor integrated therein.
- the pouring tubes 22, 24 with the machine stand 32 and the side seals 25 are completely surrounded by a closable housing 30, which has an opening 30 'on its upper side for the pouring tube 13 extending between the pouring tubes 22, 24 and an opening 30 on the underside "for the emerging metal strip 15, these openings 30 ', 30" being sealed and the housing interior 33 being filled with a protective gas, preferably an inert gas, during casting.
- a protective gas preferably an inert gas
- This box-shaped housing 30 is very advantageously arranged both laterally and at the top at a distance from the casting tubes 22, 24 or from the machine stand 32, so that no sealing elements shielding against the outside need be provided, as was mentioned, for example, in the casting machine at the beginning Document EP-A-0 780 177 is required.
- this housing 30 is provided with two horizontally lying doors 35, which are equipped in such a way that they can be moved from the closed position shown in FIG. 1 to a horizontally pushed position. For this purpose, they are guided laterally in corresponding rails (not illustrated), wherein they are advantageously lowered into the closed position shown in order to achieve the intended tightness of the housing 30.
- This one door could be provided to save on sealing gaps.
- This one door would advantageously have a size approximately equal to the two doors 35 shown and would accordingly be provided with the opening 30 'for the melt passage.
- the area above the bathroom mirror can be provided with a partially closable opening.
- the housing 30 is also assigned openings 39 which can be closed laterally by means of doors 36 and which serve to ensure that the side seals 25 of the casting tubes 22, 24 are each moved from the operating position through these openings 39 out of or into the operating position by a manipulator 40 shown outside the housing 30 can be guided into the housing 30.
- the respective manipulator 40 has a holding arm 41 and a drive 42 that is adjustable in height. It can be moved from an operating position into a retracted maintenance position and vice versa.
- a seal of the non-closed opening 39 can be brought about by means of a separate protective cover 38, this protective cover 38 enclosing the manipulator 40 and consequently sealingly striking the housing 30 laterally.
- cassettes 88 indicated for the approach and removal of side seals 25.
- two such manipulators 40 are advantageously installed on both sides of the housing 30, which alternately bring the corresponding side seals 25 to the end faces 22 ′′, 24 ′ of the casting tubes 22, 24 and press them against the casting tubes during casting.
- These manipulators 40 is assigned a protective cover 38, which can also be moved against the housing 30 or away from it.
- the cast metal strip 15 is guided below the housing 30 into an additional longitudinal housing 44, which forms a chamber 45, in which a protective gas is also contained, in order to prevent the metal strip 15 from coming into contact with oxygen and thus in particular to protect against scaling.
- a plurality of rollers 46 and press rollers 47 are arranged in this chamber 44, so that the metal strip 15 is guided through this longitudinal housing 44 and through an opening 48 sealed in it. After exiting from this housing 44, this metal strip, which has cooled until then, can be rolled up or processed in some other way.
- the longitudinal housing 44 has a depression 49 below the opening 30 ′′ or the casting gap 15 ′, in which there is a collecting container 52 placed in a system base 51.
- This collecting container 52 has the task of removing the bottom in the event of a leak To catch the liquid melt emerging from the casting tubes without causing any damage above this container 52 there are still pivotable guide flaps 54, 55 which form a passage in the position shown, but in the dot-dash pivot position 54 ', 55' as the guideway of the metal strip 15 serve.
- the upper opening 30 'in the housing 30 is sealed by a bellows 11 or the like connecting the vessel 18 to it, this sleeve-shaped bellows 11 enclosing the casting tube 13.
- the pouring tube could also be omitted and a freewheel could be provided.
- the lower opening 30 ′′ of the housing, through which the band 15 passes, can be sealed, for example, by a gas screen generated by nozzles 34.
- the housing 30 has a feed line (not shown in more detail) for blowing protective gas into the interior 33. Shielding gas can also be passed additionally into the distributor vessel 18 provided with a lid. The gas introduced into the housing 30 can be cooled and returned by a gas circuit. After a casting process has been completed and before the housing is opened, the protective gas can be drawn off into a reservoir and, if necessary, the air can be filtered out in it.
- the doors 35 shown in sections are each assigned on their underside a sealing system 60 which interacts with a casting roller 22, 24 and by means of which a chamber 33 'which is separate from the rest of the housing interior 33 is formed above the metal bath.
- a different protective gas for example argon, is contained in this chamber 33 'than nitrogen N 2 , for example, in the rest of the housing interior 33.
- This sealing system 60 comprises two sealing lips 61, 62 on the door 35 which extend without contact along the casting roll 22, 24.
- a row of nozzles 65 is also present in the sealing lip 62 facing the metal bath, from which protective gas in the direction of the arrow 65 'between the Blows roller 22 and the outer sealing lip 61 outwards.
- the blowing direction takes place at an angle a to the horizontal, which can be approximately 5 to 20 °. This results in an additional sealing effect between this chamber 33 'and the rest of the housing interior 33.
- a seal not shown, from the doors to the side seals.
- 4 shows an alternative sealing of the lower opening 30 "of the housing 30, which takes place in the embodiment according to FIG Housing 30 is attached to an element 67, protrudes through the opening 30 ′′ and is set against the metal strip 15 at the lower free end by a sleeve 69 and an elastic element contained therein, for example a compression spring 68.
- This compression spring 68 is held together with the sleeve 69 in a holding member 70. If, instead of the tape, instead of the strip, instead of the tape, melt passes between these sealing strips 66, these can be pushed apart from one another.
- sealing rollers 76 are provided, which are pressed by the compression springs 68 against the metal strip 15 can be pressed. If necessary, these sealing rollers 76 can be pushed away from each other. Furthermore, wipers 78 and brushes 80 or the like are indicated, which ensure that the sealing rollers 76 on the outer jacket are always clean.
- the sealing rollers 76 could also serve as a secondary mold which, in the event of a leak in the casting tubes 22, 24, would catch the molten metal and release it in crystalline form to the collecting container 52. In addition, they could flatten the resulting beards as they passed the casting belt 15 in order to protect the subsequent sensitive rolling rolls.
- Fig. 6 illustrates a further variant of a contactless seal at the opening 30 "of the housing 30.
- protective gas for example nitrogen
- nozzles 91, 92 on both sides to the casting belt 15 in order to achieve the desired seal in the
- withdrawal opening 93, 94 which extends along the belt and through which the openings 30 below the housing orderly water cooling 99 resulting water vapor or other dirt particles are suctioned off and do not get into the interior of the housing 30 through the opening 30 ".
- the side seals could be held on a manipulator that could be moved into the interior of the housing 30 and thereby the doors 36 would be closed during the casting and the additional protective sleeves 38 would not be needed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Coating With Molten Metal (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01751/99A CH691576A5 (de) | 1999-09-24 | 1999-09-24 | Bandgiessmaschine zur Erzeugung eines Metallbandes. |
CH175199 | 1999-09-24 | ||
PCT/EP2000/009158 WO2001023120A1 (de) | 1999-09-24 | 2000-09-19 | Bandgiessmaschine zur erzeugung eines metallbandes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1214163A1 true EP1214163A1 (de) | 2002-06-19 |
EP1214163B1 EP1214163B1 (de) | 2004-07-21 |
Family
ID=4217715
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99811002A Withdrawn EP1086763A1 (de) | 1999-09-24 | 1999-11-03 | Bandgiessmaschine zur Erzeugung eines Metallbandes |
EP00962506A Expired - Lifetime EP1214163B1 (de) | 1999-09-24 | 2000-09-19 | Bandgiessmaschine zur erzeugung eines metallbandes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99811002A Withdrawn EP1086763A1 (de) | 1999-09-24 | 1999-11-03 | Bandgiessmaschine zur Erzeugung eines Metallbandes |
Country Status (7)
Country | Link |
---|---|
US (1) | US7121322B2 (de) |
EP (2) | EP1086763A1 (de) |
AT (1) | ATE271434T1 (de) |
AU (1) | AU7420300A (de) |
CH (1) | CH691576A5 (de) |
DE (1) | DE50007148D1 (de) |
WO (1) | WO2001023120A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4542247B2 (ja) * | 2000-08-08 | 2010-09-08 | キャストリップ・リミテッド・ライアビリティ・カンパニー | ストリップ連続鋳造装置及びその使用方法 |
AT411025B (de) * | 2002-02-27 | 2003-09-25 | Voest Alpine Ind Anlagen | Vorrichtung zum kontinuierlichen vergiessen von metallschmelze |
CH695849A5 (de) * | 2002-04-18 | 2006-09-29 | Main Man Inspiration Ag | Verfahren und Giessmaschine zum Giessen von Metall, insbesondere von Stahl, zu Flach- und/oder Langprodukten. |
AT412539B (de) * | 2003-05-06 | 2005-04-25 | Voest Alpine Ind Anlagen | Zweiwalzengiesseinrichtung |
US20090236068A1 (en) * | 2008-03-19 | 2009-09-24 | Nucor Corporation | Strip casting apparatus for rapid set and change of casting rolls |
CN110087798B (zh) * | 2016-12-26 | 2022-02-11 | 普锐特冶金技术日本有限公司 | 密封方法、密封装置以及具备该密封装置的连续铸造装置 |
CN110312581B (zh) * | 2017-02-23 | 2021-05-18 | 普锐特冶金技术日本有限公司 | 薄板连续铸造装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6277151A (ja) * | 1985-09-30 | 1987-04-09 | Nippon Steel Corp | 双ロール型連続鋳造装置 |
JPH0342101A (ja) * | 1989-07-10 | 1991-02-22 | Hitachi Ltd | 圧延設備,圧延方法及び圧延制御方法 |
US5103895A (en) * | 1989-07-20 | 1992-04-14 | Nippon Steel Corporation | Method and apparatus of continuously casting a metal sheet |
JPH03291135A (ja) * | 1990-04-05 | 1991-12-20 | Nippon Steel Corp | 双ロール鋳造法による表面性状の優れた低炭素鋼薄鋳片の製造方法及びその製造装置 |
AU4294493A (en) * | 1992-07-21 | 1994-02-14 | Bhp Steel (Jla) Pty Limited | Strip caster |
FR2700282B1 (fr) * | 1993-01-13 | 1995-03-03 | Seva | Procédé et installation de fabrication de rubans métalliques amorphes par hypertrempe. |
JPH06339752A (ja) * | 1993-05-31 | 1994-12-13 | Nippon Steel Corp | 双ロール式連続鋳造機および連続鋳造方法 |
FR2727338A1 (fr) * | 1994-11-30 | 1996-05-31 | Usinor Sacilor | Dispositif de coulee continue entre cylindres a capotage d'inertage |
AUPN733095A0 (en) * | 1995-12-22 | 1996-01-25 | Bhp Steel (Jla) Pty Limited | Twin roll continuous caster |
AUPN872596A0 (en) * | 1996-03-19 | 1996-04-18 | Bhp Steel (Jla) Pty Limited | Strip casting |
-
1999
- 1999-09-24 CH CH01751/99A patent/CH691576A5/de not_active IP Right Cessation
- 1999-11-03 EP EP99811002A patent/EP1086763A1/de not_active Withdrawn
-
2000
- 2000-09-19 AT AT00962506T patent/ATE271434T1/de active
- 2000-09-19 AU AU74203/00A patent/AU7420300A/en not_active Abandoned
- 2000-09-19 EP EP00962506A patent/EP1214163B1/de not_active Expired - Lifetime
- 2000-09-19 WO PCT/EP2000/009158 patent/WO2001023120A1/de active IP Right Grant
- 2000-09-19 DE DE50007148T patent/DE50007148D1/de not_active Expired - Lifetime
-
2001
- 2001-09-19 US US10/380,440 patent/US7121322B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0123120A1 * |
Also Published As
Publication number | Publication date |
---|---|
CH691576A5 (de) | 2001-08-31 |
DE50007148D1 (de) | 2004-08-26 |
US20040040689A1 (en) | 2004-03-04 |
US7121322B2 (en) | 2006-10-17 |
EP1214163B1 (de) | 2004-07-21 |
AU7420300A (en) | 2001-04-30 |
ATE271434T1 (de) | 2004-08-15 |
EP1086763A1 (de) | 2001-03-28 |
WO2001023120A1 (de) | 2001-04-05 |
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