EP0961665B1 - Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze - Google Patents

Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze Download PDF

Info

Publication number: EP0961665B1
Authority: EP; European Patent Office
Prior art keywords: casting; chamber; suction; inert gas; oxygen
Prior art date: 1997-02-14
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

EP98910649A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0961665A1 (de

Inventor

Gerald Hohenbichler

Stefano Pellissetti

Romeo Capotosti

Giuseppe Guasto

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.)

Primetals Technologies Austria GmbH

Acciai Speciali Terni SpA

Original Assignee

Voest Alpine Industrienlagenbau GmbH

Acciai Speciali Terni SpA

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.)

1997-02-14

Filing date

1998-02-12

Publication date

2001-06-20

1998-02-12 Application filed by Voest Alpine Industrienlagenbau GmbH, Acciai Speciali Terni SpA filed Critical Voest Alpine Industrienlagenbau GmbH

1999-12-08 Publication of EP0961665A1 publication Critical patent/EP0961665A1/de

2001-06-20 Application granted granted Critical

2001-06-20 Publication of EP0961665B1 publication Critical patent/EP0961665B1/de

2018-02-12 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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
- B22D11/06—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
- 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
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
- 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
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/003—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases

Definitions

the invention relates to a method for preventing the contact of Oxygen with a molten metal during continuous casting, the Molten metal flows into and out of a casting space bounded by walls this emerges as a strand, and a device for performing the Procedure.
the invention aims to avoid these disadvantages and difficulties and sets itself the task of a method of the type described above and a device for continuous casting, with which contact of oxygen can be prevented with a molten metal, which creates a Reoxidation completely prevented, etc. even if it becomes a strong one Wear on the existing between the walls forming the casting room Splitting is coming.
This task is carried out in a method of the type described in the introduction solved by penetrating through any gaps between the walls attempting and / or oxygen adhering to the walls is suctioned off.
a particularly efficient removal of the oxygen can be advantageous achieve in that the suction in several from the outside to the inside Casting chamber takes place behind successively arranged suction stages, whereby expedient suction with from level to level from outside to inside Casting chamber takes place decreasing pressure.
the suction pressure in the suction level closest to the casting chamber below 50 mbar, preferably below 10 mbar, set.
the inert gas is preferably converted in several from the outside to the inside Pouring chamber adjacent to inert gas stages against the wall blown.
the inert gas is expediently at a rate of at least 0.5 m / s, maximum 10 m / s, preferably with more than 2 m / s, on the wall inflated.
the casting chamber is moved into the Casting area newly entering wall areas of this wall before entering frees this adhering oxygen by sucking off the oxygen.
the Continuous casting is then advantageously carried out using the roll casting process, preferably in the Two-roll casting process, i.e. that also roll casting process with only one Casting roll, as described for example in EP-B - 0 040 072, for the The method according to the invention can be considered.
Chill molds with rigid walls are an advantage, e.g. when applying one Casting powder is not possible or would be too expensive.
a device with which contact of oxygen with a Metal melt can be prevented during continuous casting one of Walls of the pouring chamber is filled with molten metal and from which Casting chamber is a strand exits through a casting gap of the casting room characterized in that on any between adjacent walls existing gaps a suction device to penetrate through the gaps trying and / or for oxygen adhering to the walls is.
a device for the continuous casting of a metal strip preferably a steel belt with two counter-rotating casting rolls with parallel roller axes and two side dams
the together form a casting space for the absorption of molten metal and with a cover which is arranged above the casting chamber and this closes at the top, and with a sealing device that the Access of air along one of the hood and the rotating ones Casting roll formed gap in the casting room prevented
the Invention underlying object advantageously solved in that the Sealing device of at least one on the atmosphere side in the vicinity of the Gap between the rotating casting rolls and the cover arranged and extending parallel to the roller axis suction chamber is formed.
This sealing device works particularly effectively if it is used by several suction chambers arranged side by side in the circumferential direction of the casting rolls is formed. It is advantageous if each suction chamber has a Suction line with an assigned suction pump or a stage one multi-stage suction pump is connected. After a constructively simple Embodiment is the sealing device as a serial multi-chamber system educated. This measure increases the suction pressure in the direction of movement the casting rollers from suction chamber to suction chamber. By a appropriate adjustment of the number of suction chambers to the The peripheral speed of the casting rolls is a complete removal of the entrained air achievable.
the sealing device is in the defined distance from the surface of the casting roll and that of the Sealing device and the gap formed by the casting roll surface at least input and output side with contact seals, preferably Sealed brush or rubber lip seals.
At least one of the suction chambers is additionally equipped with an inert gas purge.
the device is improved in that between the cover and an inert gas supply is arranged in the suction device, this Inert gas supply as a vacuum chamber with one against the casting rolls directed opening is formed.
This Inert gas supply as a vacuum chamber with one against the casting rolls directed opening is formed.
the opening as a nozzle is advantageous formed obliquely against the casting roll surface and to the neighboring Suction chamber is inclined. This measure will Inert gas layer close to the roll is applied to the casting roll and thus a excellent protection against the ingress of oxygen and air. Will one Inert gas layer a few millimeters thick on the casting roll applied and an inert gas is used, which is heavier than air, so it is not necessary that the cover directly to the Inert gas supply and suction device connects.
the two-roll caster as shown schematically in Fig. 1 in section is shown, has two driven casting rolls 1, 2, the roller axes 3, 4 arranged parallel to one another in a horizontal one Level are arranged.
the two in opposite directions in the direction of arrow 5, 6 rotating casting rolls 1, 2 are with an internal cooling, not shown for the casting roll jacket, which forms the casting roll surface 7.
On the face side side dams 8 are sufficiently close to the casting rolls 1, 2 arranged. From the casting rolls 1, 2 and the side dams 8 is a Casting chamber 9 is formed, in which one, not shown Melt container or a distribution vessel by using a Outlet openings 11 provided feed nozzle 10 melt 20 is introduced, which forms a melt pool 12.
the casting chamber 9 is facing upwards the casting rolls 1, 2 and opposite the side dams 8 with a cover 13 limited, which has a refractory lining 14 on the melt side, around the melt 20 against excessive heat loss and against reoxidation to protect the atmospheric oxygen.
a support device 15 for the Cover 13 with a stationary frame 16 with Adjusting elements 17 is adjustable, a desired minimum gap 18 between the cover 13 and the casting rolls 1, 2 set.
the Cover 13 is penetrated by the feed nozzle 10, between them Components as small a gap as possible is provided, which if necessary is covered by a seal.
the melt to be cast 20 is continuously introduced into the casting chamber 9.
the melt to be cast 20 is continuously introduced into the casting chamber 9.
To the counter-rotating and cooled casting rolls 1, 2 are increasingly formed Stronger shells from the narrowest cross section between the Casting rollers are connected to form a band formed by the casting rollers.
the Thickness of the strip fed out by the casting rolls is the distance of the determined both casting rollers.
a sealing device formed by a suction chamber 24 23 on the atmosphere side in the vicinity of the gap 18 and at a short distance arranged from the casting roll surface 7.
the suction chamber 24 is for Casting roll surface 7 open and with a suction line 25 and one Suction pump, not shown, connected.
the suction chamber 24 is in easily from a U-profile open to the casting roll surface formed, which is parallel to the roller axis 3, 4 at a short distance extends from the casting roll surface over the entire length of the casting roll.
the gap between the suction chamber 24 and the casting roll surface 7 is included attached to the U-profile legs touching the casting roll surface 7 Seals 27 covered, preferably as a brush or Rubber lip seals are formed.
This as Serial multi-chamber system designed sealing device 23 allows it, the introduced air in several extraction stages with in To operate the casting roll direction of rotation gradually decreasing chamber pressure.
the pressure in the last suction chamber 31 in the direction of casting roll rotation is Achieving optimal air extraction to a value below 50 mbar, preferably below 10 mbar.
an inert gas supply 28 arranged, which is formed by a vacuum chamber 29 and one against the casting roll surface has directed opening 32.
a vacuum chamber 29 is formed by a vacuum chamber 29 and one against the casting roll surface has directed opening 32.
a supply line 30 for inert gas is connected to a supply line 30 for inert gas.
Vacuum chamber 29 formed in the same way as the suction chamber 24 and in order to avoid entry of false air, both are in one unit summarized.
the vacuum chamber 29 is also for the same reason hermetically connected to the cover 13.
the Vacuum chamber 29 with a directed against the casting roll surface 7 Exit opening formed the vacuum chamber with the serial Multi-chamber system of the sealing device 23 into one structural unit is summarized and sealed against air access.
Inert gas is introduced into the vacuum chamber 29 in order to at the Casting roll surface 7 to build up a flow boundary layer of inert gas, through the gap 18 between the casting rolls 1, 2 and the cover 13 is introduced into the casting chamber 9 instead of the air.
the pressure in the vacuum chamber 29 is at least 10 mbar, preferably by more than 200 mbar, above the pressure of the upstream Suction device 23 is set.
FIG. 3 an embodiment is shown in which several Vacuum chambers 29, which have a common inert gas supply 28 are connected, within a connected to a suction line 25 Suction chamber 24 are arranged for the fresh air suction.
vacuum chamber 29a At the in Casting roller direction of rotation last and directly in front of the cover 13 positioned vacuum chamber 29a is in contrast to the upstream Vacuum chambers 29 the inert gas pressure to a value above that Atmospheric pressure set.
Last remnants of in the boundary layer on the casting roll surface 7 adhering atmospheric oxygen can be removed with the inert gas purge when the inert gas is blown directly against the casting roll surface 7 , the flow velocity to at least 0.5 m / s, preferably is set to more than 2 m / s. Flow velocities of more than 10 m / s bring no additional effect.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Continuous Casting (AREA)
Manufacture And Refinement Of Metals (AREA)
Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Spark Plugs (AREA)
Coupling Device And Connection With Printed Circuit (AREA)
Manufacture Of Switches (AREA)

EP98910649A 1997-02-14 1998-02-12 Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze Expired - Lifetime EP0961665B1 (de)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
IT97RM000082A IT1290932B1 (it)	1997-02-14	1997-02-14	Procedimento e dispositivo per impedire il contatto di ossigeno con una massa metallica fusa.
ITRM970082		1997-02-14
PCT/EP1998/000788 WO1998035773A1 (de)	1997-02-14	1998-02-12	Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze

Publications (2)

Publication Number	Publication Date
EP0961665A1 EP0961665A1 (de)	1999-12-08
EP0961665B1 true EP0961665B1 (de)	2001-06-20

Family

ID=11404759

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98910649A Expired - Lifetime EP0961665B1 (de)	1997-02-14	1998-02-12	Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze

Country Status (17)

Country	Link
US (1)	US6415849B1 (it)
EP (1)	EP0961665B1 (it)
JP (1)	JP2001512371A (it)
KR (1)	KR100525035B1 (it)
CN (1)	CN1072056C (it)
AT (1)	ATE202304T1 (it)
AU (1)	AU744243B2 (it)
BR (1)	BR9807225A (it)
CA (1)	CA2281703A1 (it)
DE (1)	DE59800886D1 (it)
ES (1)	ES2160406T3 (it)
ID (1)	ID22429A (it)
IT (1)	IT1290932B1 (it)
PL (1)	PL335252A1 (it)
RU (1)	RU2199416C2 (it)
UA (1)	UA48296C2 (it)
WO (1)	WO1998035773A1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2002113555A (ja) *	2000-10-10	2002-04-16	Castrip Llc	双ロール式連続鋳造機及びその使用方法
CN103451371B (zh) *	2013-09-10	2016-01-20	泰州鑫宇精密铸造有限公司	感应炉钢液覆盖吹氩保护浇注工艺及装置
AT520033B1 (de) *	2017-06-02	2022-01-15	Asmag Holding Gmbh	Strangpressmaschine
CN113231610B (zh) *	2021-04-30	2022-09-23	中冶赛迪工程技术股份有限公司	弧形振动薄带连铸方法及薄带连铸连轧生产线

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Publication number	Priority date	Publication date	Assignee	Title
US3920062A (en) *	1972-10-03	1975-11-18	Special Metals Corp	Control method for continuously casting liquid metal produced from consumable electrodes
DE2747061A1 (de)	1977-10-20	1979-04-26	Leybold Heraeus Gmbh & Co Kg	Verfahren und vorrichtung zum beschichten von baendern in vakuumanlagen mit schleuseneinrichtungen
DE2831710B1 (de) *	1978-07-19	1979-10-25	Messerschmitt Boelkow Blohm	Einrichtung zur Erhoehung des Vakuums in einer von einem Band durchlaufenen Vakuumkammer
DE2950406C2 (de) *	1979-12-14	1986-12-04	Hitachi Metals, Ltd., Tokyo	Vorrichtung zum Stranggießen eines Metallbandes
YU43229B (en)	1980-05-09	1989-06-30	Battelle Development Corp	Device for continuous band casting
JPS6040653A (ja) *	1983-08-12	1985-03-04	Hitachi Ltd	真空溶解連続鋳造法
DE3602594A1 (de) *	1986-01-29	1987-07-30	Sundwiger Eisen Maschinen	Vorrichtung zum giessen von metallbaendern auf einem bewegten kuehlkoerper
US4987949A (en) *	1988-07-29	1991-01-29	Hitachi Zosen Corporation	Protective cover for surface of molten steel used in continuous casting apparatus
FR2654657B1 (fr) *	1989-11-22	1992-03-20	Siderurgie Fse Inst Rech	Dispositif de coulee continue de bandes minces de metal entre deux cylindres.
SE507606C2 (sv) *	1991-03-06	1998-06-29	Tetra Laval Holdings & Finance	Anordning för framställning av banformig metallfolie
AU1955592A (en) *	1991-08-06	1993-02-11	Olin Corporation	Casting of metal strip
WO1993022087A1 (en)	1992-04-24	1993-11-11	Ishikawajima-Harmia Heavy Industries Company Limited	Vapor extraction in continuous strip casting
US5293926A (en) *	1992-04-30	1994-03-15	Allegheny Ludlum Corporation	Method and apparatus for direct casting of continuous metal strip
FR2727338A1 (fr) *	1994-11-30	1996-05-31	Usinor Sacilor	Dispositif de coulee continue entre cylindres a capotage d'inertage
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1997
- 1997-02-14 IT IT97RM000082A patent/IT1290932B1/it active IP Right Grant
1998
- 1998-02-12 CA CA002281703A patent/CA2281703A1/en not_active Abandoned
- 1998-02-12 BR BR9807225-0A patent/BR9807225A/pt not_active IP Right Cessation
- 1998-02-12 CN CN98802525A patent/CN1072056C/zh not_active Expired - Fee Related
- 1998-02-12 EP EP98910649A patent/EP0961665B1/de not_active Expired - Lifetime
- 1998-02-12 WO PCT/EP1998/000788 patent/WO1998035773A1/de active IP Right Grant
- 1998-02-12 DE DE59800886T patent/DE59800886D1/de not_active Expired - Fee Related
- 1998-02-12 JP JP53534498A patent/JP2001512371A/ja active Pending
- 1998-02-12 ID IDW990629A patent/ID22429A/id unknown
- 1998-02-12 RU RU99119593/02A patent/RU2199416C2/ru not_active IP Right Cessation
- 1998-02-12 US US09/367,434 patent/US6415849B1/en not_active Expired - Fee Related
- 1998-02-12 KR KR10-1999-7006578A patent/KR100525035B1/ko not_active IP Right Cessation
- 1998-02-12 PL PL98335252A patent/PL335252A1/xx unknown
- 1998-02-12 AT AT98910649T patent/ATE202304T1/de not_active IP Right Cessation
- 1998-02-12 AU AU64963/98A patent/AU744243B2/en not_active Ceased
- 1998-02-12 ES ES98910649T patent/ES2160406T3/es not_active Expired - Lifetime
- 1998-12-02 UA UA99084539A patent/UA48296C2/uk unknown

Also Published As

Publication number	Publication date
UA48296C2 (uk)	2002-08-15
CN1072056C (zh)	2001-10-03
ITRM970082A1 (it)	1998-08-14
PL335252A1 (en)	2000-04-10
US6415849B1 (en)	2002-07-09
ES2160406T3 (es)	2001-11-01
KR100525035B1 (ko)	2005-11-01
DE59800886D1 (de)	2001-07-26
JP2001512371A (ja)	2001-08-21
AU744243B2 (en)	2002-02-21
RU2199416C2 (ru)	2003-02-27
ATE202304T1 (de)	2001-07-15
BR9807225A (pt)	2000-04-25
WO1998035773A1 (de)	1998-08-20
EP0961665A1 (de)	1999-12-08
CA2281703A1 (en)	1998-08-20
ID22429A (id)	1999-10-14
AU6496398A (en)	1998-09-08
CN1247488A (zh)	2000-03-15
IT1290932B1 (it)	1998-12-14
KR20000070345A (ko)	2000-11-25

Publication	Publication Date	Title
DE2526078B2 (de)	1978-05-24	Walzenkühlvorrichtung für ein Quartowalzgerüst
DE2043882A1 (en)	1971-03-11	Flat cast object formed with a spray of - atomised metal
DE69410688T2 (de)	1999-02-25	Stranggiessverfahren mit Kokillen-Aufsatz und Kokille zur Anwendung
DE3707897C2 (it)	1990-07-05
DE3330810C2 (de)	1985-12-05	Vorrichtung und Verfahren zum Stranggießen von Metall
EP0961665B1 (de)	2001-06-20	Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
EP0114309B1 (de)	1987-02-18	Verfahren und Einrichtung zum Abdichten eines Anfahrkopfes in einer Stranggiesskokille
DE3214211A1 (de)	1982-12-02	Verfahren und vorrichtung zur oxidationsverhinderung bei frisch gegossenen kupferprodukten nach dem austritt aus giessmascchinen mit zwei giessbaendern
EP1214163B1 (de)	2004-07-21	Bandgiessmaschine zur erzeugung eines metallbandes
DE102008039140A1 (de)	2010-03-04	Verfahren und Vorrichtung zum Erzeugen eines Magnesiumbands
WO2003053612A1 (de)	2003-07-03	Verfahren und vorrichtung zur herstellung eines besäumten metallbandes
AT414103B (de)	2006-09-15	Verfahren zur herstellung eines gegossenen metallbandes und zweiwalzengiesseinrichtung hierzu
DE2518903A1 (de)	1976-01-22	Stranggiessverfahren und -vorrichtung
EP1478478B1 (de)	2005-12-07	Vorrichtung zum kontinuierlichen vergiessen von metallschmelze
DE4123956C2 (de)	1994-07-21	Verfahren und Anlage zum Herstellen eines Metallstranges durch Gießen
DE2853868A1 (de)	1979-06-21	Verfahren und vorrichtungen zum stranggiessen unzertrennter straenge aus stahl sowie dementsprechend hergestellte strangerzeugnisse
EP1340565B1 (de)	2008-11-19	Vorrichtung zum kontinuierlichen Vergiessen von Metallschmelze zu gegossenem Band
DE2534244A1 (de)	1976-02-12	Schutzgasabdeckung fuer eine streifengiessvorrichtung
DE3640144C2 (it)	1989-05-11
DE1483596A1 (de)	1969-09-18	Verfahren und Vorrichtung zum Stranggiessen von Metallen
DE10333766B4 (de)	2009-01-22	Verfahren und Vorrichtung zum Schmelztauchbeschichten von Metallband
AT402266B (de)	1997-03-25	Stranggiessanlage
DE2426692C3 (de)	1976-02-19	Verfahren und Vorrichtung zum Kühlen des sich in einer oszillierenden Kokille bildenden Stranges beim Stranggießen von Stahl
WO2002045885A1 (de)	2002-06-13	Verfahren zur herstellung von zumindest einseitig beschichteten warm- oder kaltprodukten in form eines bandes
DE3525446A1 (de)	1987-01-22	Giessstrahl-schutzvorrichtung

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