EP0913219A1 - Verfahren zum Giessen flüssiger Metalle in eine mindestens zwei feuerfeste Teile aufweisende Leitung - Google Patents

Verfahren zum Giessen flüssiger Metalle in eine mindestens zwei feuerfeste Teile aufweisende Leitung Download PDF

Info

Publication number: EP0913219A1
Authority: EP; European Patent Office
Prior art keywords: oil; conduit; joint plane; inert gas; injection
Prior art date: 1997-06-26
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

Application number

EP98401310A

Other languages

English (en)

French (fr)

Other versions

EP0913219B1 (de

Inventor

Michel Florent

Francis Lecleire

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.)

Sollac SA

Original Assignee

Sollac SA

Lorraine de Laminage Continu SA SOLLAC

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.)

1997-06-26

Filing date

1998-06-02

Publication date

1999-05-06

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9508458&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0913219(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1998-06-02 Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA

1999-05-06 Publication of EP0913219A1 publication Critical patent/EP0913219A1/de

2003-01-29 Application granted granted Critical

2003-01-29 Publication of EP0913219B1 publication Critical patent/EP0913219B1/de

2018-06-02 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 20
239000002184 metal Substances 0.000 title abstract description 16
239000011261 inert gas Substances 0.000 claims abstract description 54
239000007789 gas Substances 0.000 claims abstract description 27
238000002347 injection Methods 0.000 claims description 63
239000007924 injection Substances 0.000 claims description 63
229910001338 liquidmetal Inorganic materials 0.000 claims description 22
238000007789 sealing Methods 0.000 claims description 18
238000005266 casting Methods 0.000 claims description 16
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
239000002245 particle Substances 0.000 claims description 7
229910052799 carbon Inorganic materials 0.000 claims description 6
229910002804 graphite Inorganic materials 0.000 claims description 6
239000010439 graphite Substances 0.000 claims description 6
230000001105 regulatory effect Effects 0.000 claims description 6
238000000354 decomposition reaction Methods 0.000 claims description 5
238000005336 cracking Methods 0.000 claims description 4
239000000779 smoke Substances 0.000 claims description 3
238000011156 evaluation Methods 0.000 claims description 2
239000012530 fluid Substances 0.000 claims description 2
230000015556 catabolic process Effects 0.000 abstract 1
238000006731 degradation reaction Methods 0.000 abstract 1
239000003921 oil Substances 0.000 description 48
229910000831 Steel Inorganic materials 0.000 description 21
239000010959 steel Substances 0.000 description 21
XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 14
229910052786 argon Inorganic materials 0.000 description 7
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
239000007788 liquid Substances 0.000 description 6
239000000463 material Substances 0.000 description 5
239000007787 solid Substances 0.000 description 5
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
230000000694 effects Effects 0.000 description 3
229910052757 nitrogen Inorganic materials 0.000 description 3
239000001301 oxygen Substances 0.000 description 3
229910052760 oxygen Inorganic materials 0.000 description 3
239000011819 refractory material Substances 0.000 description 3
CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
230000006866 deterioration Effects 0.000 description 2
238000004821 distillation Methods 0.000 description 2
229930195733 hydrocarbon Natural products 0.000 description 2
150000002430 hydrocarbons Chemical class 0.000 description 2
238000005304 joining Methods 0.000 description 2
230000001050 lubricating effect Effects 0.000 description 2
238000005058 metal casting Methods 0.000 description 2
VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
230000000737 periodic effect Effects 0.000 description 2
239000011148 porous material Substances 0.000 description 2
239000000843 powder Substances 0.000 description 2
230000001681 protective effect Effects 0.000 description 2
229910052845 zircon Inorganic materials 0.000 description 2
GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
229910001208 Crucible steel Inorganic materials 0.000 description 1
101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 description 1
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
239000003153 chemical reaction reagent Substances 0.000 description 1
239000003245 coal Substances 0.000 description 1
238000009749 continuous casting Methods 0.000 description 1
230000007547 defect Effects 0.000 description 1
230000001627 detrimental effect Effects 0.000 description 1
238000009792 diffusion process Methods 0.000 description 1
229940082150 encore Drugs 0.000 description 1
230000004927 fusion Effects 0.000 description 1
230000005484 gravity Effects 0.000 description 1
239000004519 grease Substances 0.000 description 1
230000009931 harmful effect Effects 0.000 description 1
239000007943 implant Substances 0.000 description 1
230000008595 infiltration Effects 0.000 description 1
238000001764 infiltration Methods 0.000 description 1
238000009434 installation Methods 0.000 description 1
238000005461 lubrication Methods 0.000 description 1
238000003754 machining Methods 0.000 description 1
239000000395 magnesium oxide Substances 0.000 description 1
230000035515 penetration Effects 0.000 description 1
239000003208 petroleum Substances 0.000 description 1
238000011084 recovery Methods 0.000 description 1
238000007711 solidification Methods 0.000 description 1
230000008023 solidification Effects 0.000 description 1
238000005507 spraying Methods 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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/42—Features relating to gas injection
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means

Definitions

the invention relates to a method and a device for sealing the plane. of joint between two adjoining refractory pieces of a flow duct of molten metal.
steel is drained from the bottom of the pocket through a flow adjustment drawer, then flows into a distributor through a protective jet tube; steel is then drained from the bottom of the distributor through an internal nozzle, then flows through an external nozzle into the mold.
a pocket drain flow adjustment drawer has indeed generally two adjoining refractory plates, sliding one on top of the other in a plane perpendicular to the direction of flow of the molten metal, which are each with a hole; by sliding the plates, the surface is adjusted covering the two holes so as to regulate the steel flow.
the joining surface of two internal and external refractory nozzles poses the same sealing problems as the two refractory plates adjoining a drain drawer; like the external nozzle, made of material refractory, must be able to be changed during casting (using a nozzle exchange device), this nozzle therefore has a joint plane or contiguous surface with the internal nozzle.
the depression created in the pouring duct by the flow of liquid steel causes, at the level of joint planes of the refractory parts of the circuit, of the external gas aspirations.
an inert gas such as argon ; the injected gas is therefore found in the molten metal circuit.
This annular channel is connected to a through feed pipe towards the outside of the nozzles; it is itself connected to means for injecting inert gas.
the flow of inert gas is even generally high enough to that part of the inert gas escapes even towards the outside of the joint plane, ie towards the atmosphere.
circulation means are then used practiced in one of the refractory elements so as to reach the plane of joint or interface between the refractory elements and means for sending this matter through these means of circulation.
the disadvantage of the device described in FR 2 529 493 is that it clogs quickly and that, in the event of blockage of the circulation means of the injected material, air may again be sucked in large quantities in the pouring tube.
the invention aims to avoid the aforementioned drawbacks.
the subject of the invention is a process for casting liquid metal. through a conduit comprising at least two adjoining refractory pieces in which, during the flow of said liquid metal in said conduit, it is injects a gas, inert with respect to said liquid metal, at the joint plane between the two said refractory pieces so as to avoid the introduction of gases coming from the atmosphere in said conduit at said joint plane, characterized in that oil is propelled or injected at the level of said plane joint using said inert gas.
said circulation means comprise an annular channel formed around said duct in the plane of joint of said two refractory pieces and a supply duct for said channel annular opening to the outside and connected to said gas injection means.
the liquid steel of the distributor is emptied by an integral internal nozzle from the bottom of the distributor which communicates with an external refractory nozzle whose lower end dips below the level of liquid metal in the ingot mold.
the two successive refractory pieces that are the internal nozzle and the external nozzle therefore form a casting conduit element for steel liquid.
junction plane or contiguous surface of these two parts includes a annular channel around said conduit and a supply conduit of said annular channel opening outwards.
said supply conduit is connected to inert gas injection means.
a suitable device is added to inject oil into this circuit up to the level of the annular channel.
This oil injection device can be an injection device or a device for periodic intermittent injections of "doses" oil.
steel is poured into the dispatcher; the steel contained in the distributor then flows by gravity into the mold through the conduit formed by the two refractory nozzles.
inert gas for example argon
the supply duct of the annular channel so that, if there are leaks in the junction plane of the two nozzles, only the inert gas enters the liquid metal and any risk of pollution from liquid steel by reactive gases such as oxygen or nitrogen from the atmosphere.
the rate of injection of inert gas into the joint plane of the nozzles therefore depends on the level of these leaks and is adapted in a manner known in itself to avoid any risk of pollution of liquid steel by gases reagents like oxygen or nitrogen.
the oil entrained in this joint plane breaks down into particles solids which agglomerate and gradually accumulate in the interstices leak until they are completely sealed.
sealing is carried out more quickly when injects doses of oil with a volume greater than that of the annular canal and then injects these doses of oil intermittently.
an oil is chosen whose the cracking or decomposition temperature is lower than the normal temperature prevailing in the annular canal when pouring from metal in the duct.
oils are used containing suspended carbon particles, which facilitates clogging leaks.
the purpose of this example is to illustrate the method according to the invention applied to clogging of the joint plane between two steel casting nozzles.
the oil injection device is suitable for injecting so intermittent doses of oil with a volume much greater than that of the canal annular and so that these doses of oil are propelled by the inert gas to distribute evenly throughout the volume of the channel annular; an inert gas overpressure may be necessary for this purpose when a dose of oil is injected.
oil is therefore also injected into the inert gas circuit using the oil injection device.
the operation of the oil injection device is controlled. so as to stop the injections as soon as the required level of sealing is reached and resume as soon as the evaluated level of sealing is no longer considered sufficient.
the level of sealing between the two nozzles is evaluated by example by measuring the supply pressure of the annular channel under flow constant, or for example by measuring the feed rate under pressure constant.
the purpose of this example is to illustrate a variant implementation of the casting method according to the invention in the case where “doses” are injected oil periodically in the inert gas supply circuit, in the case where inert gas supply means are available which can be regulated in flow and in the case where the injection of oil and inert gas is regulated according to a “target” sealing level.
Periodic injection of large doses of oil and their application uniform throughout the volume of the annular canal prevents fouling of the annular channel, which is necessary to be able to maintain the tightness of the joint plane and restore it if necessary, especially after a change of external nozzle.
the argon supply pressure in the supply channel of the annular channel progressively passes from 0.3 10 5 Pa. To 2 10 5 Pa., This which indicates a good clogging of the joint plane of the two refractory nozzles.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Continuous Casting (AREA)
Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Treatment Of Steel In Its Molten State (AREA)
Ceramic Products (AREA)

EP98401310A 1997-06-26 1998-06-02 Verfahren zum Giessen flüssiger Metalle in eine mindestens zwei feuerfeste Teile aufweisende Leitung Expired - Lifetime EP0913219B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9707986		1997-06-26
FR9707986A FR2765126B1 (fr)	1997-06-26	1997-06-26	Procede de coulee de metal liquide dans un conduit comprenant au moins deux pieces refractaires

Publications (2)

Publication Number	Publication Date
EP0913219A1 true EP0913219A1 (de)	1999-05-06
EP0913219B1 EP0913219B1 (de)	2003-01-29

Family

ID=9508458

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98401310A Expired - Lifetime EP0913219B1 (de)	1997-06-26	1998-06-02	Verfahren zum Giessen flüssiger Metalle in eine mindestens zwei feuerfeste Teile aufweisende Leitung

Country Status (6)

Country	Link
US (1)	US6016940A (de)
EP (1)	EP0913219B1 (de)
AT (1)	ATE231761T1 (de)
CA (1)	CA2239480A1 (de)
DE (1)	DE69811036T2 (de)
FR (1)	FR2765126B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN1072537C (zh)	1996-10-17	2001-10-10	维苏维尤斯·克鲁斯布公司	耐火材料组合、耐火材料件及其气体供应调节方法
US6250521B1 (en) *	2000-02-02	2001-06-26	Ltv Steel Company, Inc.	Preventing air aspiration in slide gate plate throttling mechanisms
JP2021049564A (ja) *	2019-09-26	2021-04-01	黒崎播磨株式会社	タンディッシュ上ノズル構造体及び連続鋳造方法
CN115194130B (zh) *	2022-08-02	2026-06-12	宝武镁业(惠州)有限公司	镁合金浇铸过程气体保护系统
US12623279B1 (en) *	2025-06-10	2026-05-12	Wagstaff, Inc.	System, apparatus, and method for providing casting gas in a direct chill casting mold

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE7706699U1 (de) *	1977-03-04	1977-06-16	Martin & Pagenstecher Gmbh, 5000 Koeln	Schieberverschluss fuer fluessige metallschmelze enthaltende behaelter
FR2415507A1 (fr) *	1978-01-25	1979-08-24	Uss Eng & Consult	Procede et appareil pour couler le metal dans un moule de coulee continue avec reglage du debit de metal
FR2529493A1 (fr) *	1982-07-02	1984-01-06	Detalle Richard	Dispositif protecteur et lubrificateur des plaques d'etancheite dans les fermetures coulissantes utilisees dans la coulee des metaux liquides
FR2560085A1 (fr) *	1984-02-25	1985-08-30	Didier Werke Ag	Pieces d'usure refractaires pour obturateurs a tiroir
WO1997004901A1 (en) *	1995-07-27	1997-02-13	Usx Engineers And Consultants, Inc.	Limiting ingress of gas to continuous caster

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2277144A1 (fr) *	1974-07-05	1976-01-30	Air Liquide	Composition de matieres formee d'un melange d'un fluide cryogene et de particules solides
DE3533517A1 (de) *	1985-09-20	1987-04-02	Vaw Ver Aluminium Werke Ag	Verfahren und vorrichtung zum stranggiessen
FR2703609B3 (fr) *	1993-03-30	1995-02-10	Lorraine Laminage	Procédé de coulée continue en charge des métaux et lingotière pour sa mise en Óoeuvre.
FR2754749B3 (fr) *	1996-10-17	1998-12-24	Vesuvius France Sa	Installation de transfert de metal liquide, procede de mise en oeuvre et refractaires
FR2757431B1 (fr) *	1996-12-20	1999-02-12	Vesuvius France Sa	Installation de transfert de metal liquide, procede de mise en oeuvre, et refractaires

1997
- 1997-06-26 FR FR9707986A patent/FR2765126B1/fr not_active Expired - Fee Related
1998
- 1998-06-02 AT AT98401310T patent/ATE231761T1/de not_active IP Right Cessation
- 1998-06-02 DE DE69811036T patent/DE69811036T2/de not_active Expired - Fee Related
- 1998-06-02 EP EP98401310A patent/EP0913219B1/de not_active Expired - Lifetime
- 1998-06-03 CA CA002239480A patent/CA2239480A1/fr not_active Abandoned
- 1998-06-26 US US09/105,012 patent/US6016940A/en not_active Expired - Fee Related

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE7706699U1 (de) *	1977-03-04	1977-06-16	Martin & Pagenstecher Gmbh, 5000 Koeln	Schieberverschluss fuer fluessige metallschmelze enthaltende behaelter
FR2415507A1 (fr) *	1978-01-25	1979-08-24	Uss Eng & Consult	Procede et appareil pour couler le metal dans un moule de coulee continue avec reglage du debit de metal
FR2529493A1 (fr) *	1982-07-02	1984-01-06	Detalle Richard	Dispositif protecteur et lubrificateur des plaques d'etancheite dans les fermetures coulissantes utilisees dans la coulee des metaux liquides
FR2560085A1 (fr) *	1984-02-25	1985-08-30	Didier Werke Ag	Pieces d'usure refractaires pour obturateurs a tiroir
WO1997004901A1 (en) *	1995-07-27	1997-02-13	Usx Engineers And Consultants, Inc.	Limiting ingress of gas to continuous caster

Also Published As

Publication number	Publication date
US6016940A (en)	2000-01-25
EP0913219B1 (de)	2003-01-29
DE69811036D1 (de)	2003-03-06
CA2239480A1 (fr)	1998-12-26
FR2765126B1 (fr)	1999-07-30
DE69811036T2 (de)	2004-01-22
FR2765126A1 (fr)	1998-12-31
ATE231761T1 (de)	2003-02-15

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