EP1371433A1 - Procédé de coulée de produits métallurgiques sur une installation de coulée continue comportant un répartiteur - Google Patents
Procédé de coulée de produits métallurgiques sur une installation de coulée continue comportant un répartiteur Download PDFInfo
- Publication number
- EP1371433A1 EP1371433A1 EP03291435A EP03291435A EP1371433A1 EP 1371433 A1 EP1371433 A1 EP 1371433A1 EP 03291435 A EP03291435 A EP 03291435A EP 03291435 A EP03291435 A EP 03291435A EP 1371433 A1 EP1371433 A1 EP 1371433A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distributor
- sheets
- metal
- casting
- preheating
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005266 casting Methods 0.000 title claims description 18
- 238000009749 continuous casting Methods 0.000 title claims description 9
- 239000002184 metal Substances 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000011819 refractory material Substances 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000006698 induction Effects 0.000 claims abstract description 4
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 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
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011282 treatment 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- B22D41/02—Linings
-
- 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
- B22D11/10—Supplying or treating molten metal
Definitions
- the invention relates to the continuous casting of metals, and more particularly the continuous casting of steel, especially in the form of strips thin.
- Liquid steel is traditionally produced in a converter from liquid iron or electric furnace from scrap. Then its composition precise is set in a pocket. Finally, it is cast on a casting machine keep on going.
- the dispatcher constitutes a reserve of liquid metal which makes it possible to maintain a flow feeding the ingot mold to the desired value at all stages of casting, especially at the start and end of bag emptying, as well as during periods when a ladle change takes place. This allows the emptying of several consecutive pockets without interrupting the pouring (pouring in in sequence).
- the distributor serves as a "buffer" container between the pocket and the ingot (s).
- the first cause can to some extent be remedied by covering the distributor and blowing an inert gas such as argon under the cover, so as to make the atmosphere at the start of casting non-oxidizing.
- Non-metallic inclusions formed during filling of the distributor are mainly found in the surface layers of first tonnes of product poured.
- the product is a slab classic thick (around 200mm for example), it can be tolerable to remove these surface layers by grinding the surface of the slab or a few slabs affected by this fault.
- the object of the invention is to provide users of casting metals, especially steel, and in particular thin strip casting, an efficient and economical way to improve appreciably the cleanliness of the first tonnes poured.
- the invention relates to a process for casting products metal on a continuous casting installation with a distributor coated internally with a refractory material, characterized in that fixed metal sheets on the surface of said refractory material, prior to filling of said distributor with the liquid metal to be poured.
- At least part of the said is fixed. sheets before a distributor preheating operation.
- said sheets are fixed after a distributor preheating operation.
- Said sheets preferably have a composition corresponding to that of cast metal.
- the casting installation continuous is an installation for continuous casting of thin strips.
- the invention essentially consists in internally coat the distributor, before the start of casting, with a set of metal sheets avoiding direct contact between the first tonnes of metal spilled into the distributor and the new refractories from the distributor.
- the contacts between the liquid metal and the refractories are thus, essentially, delayed until the sheet melting This occurs preferably at a when the distributor is completely filled, with flows of metal corresponding to a steady flow regime.
- the dispatcher is coated internally by refractory materials based on oxides (lime, magnesia, alumina, mainly silica) present in variable proportions.
- oxides limestone, magnesia, alumina, mainly silica
- the choice of the composition of these refractories is dictated by considerations of refractoriness, chemical compatibility with the steel to be cast and cost. These refractories can be shaped or flowable.
- the refractory of the distributor are subsequently heated by burners to dry them and to give them a high temperature before casting, limiting losses of the liquid metal when it is introduced into the distributor.
- metal sheets are also prepared intended to cover at least most of the interior coating of the distributor.
- These sheets can be fixed separately on the bottom and the walls side of the distributor by means such as nails, staples etc. At least some of them can also be joined together before they are fixed to the refractories of the distributor.
- the sheets are fixed to the of the distributor while they are still cold.
- the distributor is sent to the preheating station, so that the flames of the burners no longer come into direct contact with refractory, but sheets.
- This can result in local sheet metal mergers at level of flame impacts. But these mergers only concern areas limited and do not call into question the essential protective capacities of sheets.
- the sheets will expand: the means must fixing take into account this expansion so as to prevent the sheets do not curl excessively. For example, if you use nails, you can allow cold clearance between the nails and the contours of the orifices made in the sheets to receive them.
- Another variant of the invention consists in installing the sheets in the distributor already preheated, at least for the most part, if we can use sheet fastening devices protected against refractory radiation of the dispatcher.
- the preheating of the sheets is then carried out by burners, or by an induction device which makes it possible to reach the desired temperature, in the range of 1100-1200 ° C, in a few minutes.
- the area surrounding each of the nozzles through which the liquid metal flows during the casting so that the distaff controlling the flow of the liquid metal by said nozzle can play its role.
- the material of the sheets is chosen so that after it has melted, the components it contains do not change the composition of the metal cast way which places it outside the composition limits for products to be flow.
- the sheets have a composition in accordance with that of said products to be poured.
- they are constituted by portions of bands which have been discarded after their casting (if one is in the case of a installation of thin strip casting) or their rolling, for example heads and coil tails.
- the thickness of the sheets is preferably chosen so that their fusion does not end until the distributor has been filled, and preferably after the start of casting, so at a time when the flows inside the dispatcher have reached their normal regime. At this time, a direct contact generalized between the molten liquid metal and the refractories is possible without cause excessive pollution of the metal. Indeed, inclusions from first metal-refractory reactions will be distributed in a metal flow in continuous flow, instead of concentrating in the metal used for the first filling the distributor as in the prior practice which the invention aims to improve.
- the invention finds, as has been said, a preferred application for installations for the direct casting of thin strips, for which, in general, distributors are relatively small, so with a surface area ratio of refractories / high enclosed metal volume.
- Steel casting is a prime example of application of the invention, but it goes without saying that this can be used for continuous casting of other metals and alloys.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Laminated Bodies (AREA)
Abstract
Description
- d'une part, le fait que lors des premiers instants du remplissage, l'acier liquide s'écoule à l'air libre, l'extrémité du tube en réfractaire n'étant pas encore immergée dans l'acier liquide ;
- d'autre part des réactions chimiques entre les éléments désoxydants contenus dans l'acier liquide et certains composants de la surface des réfractaires revêtant le répartiteur ; les inclusions issues de ces réactions se concentrent dans le métal servant au remplissage du répartiteur.
Claims (6)
- Procédé de coulée de produits métalliques sur une installation de coulée continue comportant un répartiteur revêtu intérieurement d'un matériau réfractaire, caractérisé en ce qu'on fixe des tôles métalliques sur la surface dudit matériau réfractaire, préalablement au remplissage dudit répartiteur par le métal liquide à couler.
- Procédé selon la revendication 1, caractérisé en ce qu'on fixe au moins une partie desdites tôles avant une opération de préchauffage du répartiteur.
- Procédé selon la revendication 1, caractérisé en ce qu'on fixe lesdites tôles après une opération de préchauffage du répartiteur.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on réalise un préchauffage final desdites tôles au moyen d'un dispositif à induction.
- Procédé selon l'une des revendications 1 à 4, caractérisé en ce que lesdites tôles ont une composition correspondant à celle du métal coulé.
- Procédé selon l'une des revendications 1 à 5, caractérisé en ce que l'installation de coulée continue est une installation de coulée continue de bandes minces.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0207384 | 2002-06-14 | ||
FR0207384A FR2840828B1 (fr) | 2002-06-14 | 2002-06-14 | Procede de coulee de produits metallurgiques sur une installation de coulee continue comportant un repartiteur |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1371433A1 true EP1371433A1 (fr) | 2003-12-17 |
Family
ID=29559180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03291435A Withdrawn EP1371433A1 (fr) | 2002-06-14 | 2003-06-13 | Procédé de coulée de produits métallurgiques sur une installation de coulée continue comportant un répartiteur |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040011500A1 (fr) |
EP (1) | EP1371433A1 (fr) |
JP (1) | JP2004034156A (fr) |
KR (1) | KR20030096078A (fr) |
AU (1) | AU2003204668A1 (fr) |
BR (1) | BR0302070A (fr) |
FR (1) | FR2840828B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8546721B2 (en) | 2007-11-20 | 2013-10-01 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Seam position control for laser processing |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096976A (en) * | 1975-06-30 | 1978-06-27 | Daussan Et Compagnie | Vessels for transferring liquid metal having a removable insulating lining |
GB1522764A (en) * | 1975-06-25 | 1978-08-31 | Centre Rech Metallurgique | Metallurgical vessel |
US4165026A (en) * | 1971-12-07 | 1979-08-21 | Foseco Trading A.G. | Tundish with expendable lining and easily removable nozzle |
GB1569970A (en) * | 1977-03-08 | 1980-06-25 | Metalaids Processes Ltd | Tundish lining |
GB2085133A (en) * | 1980-10-14 | 1982-04-21 | London Scandinavian Metall | Refractory linings for metallurgical vessels |
JPS59118253A (ja) * | 1982-12-27 | 1984-07-07 | Shinagawa Rozai Kk | タンデイツシユボ−ドの施工方法 |
-
2002
- 2002-06-14 FR FR0207384A patent/FR2840828B1/fr not_active Expired - Fee Related
-
2003
- 2003-06-12 AU AU2003204668A patent/AU2003204668A1/en not_active Abandoned
- 2003-06-13 US US10/460,676 patent/US20040011500A1/en not_active Abandoned
- 2003-06-13 KR KR10-2003-0038203A patent/KR20030096078A/ko not_active Application Discontinuation
- 2003-06-13 JP JP2003169245A patent/JP2004034156A/ja not_active Withdrawn
- 2003-06-13 BR BR0302070-3A patent/BR0302070A/pt not_active Application Discontinuation
- 2003-06-13 EP EP03291435A patent/EP1371433A1/fr not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4165026A (en) * | 1971-12-07 | 1979-08-21 | Foseco Trading A.G. | Tundish with expendable lining and easily removable nozzle |
GB1522764A (en) * | 1975-06-25 | 1978-08-31 | Centre Rech Metallurgique | Metallurgical vessel |
US4096976A (en) * | 1975-06-30 | 1978-06-27 | Daussan Et Compagnie | Vessels for transferring liquid metal having a removable insulating lining |
GB1569970A (en) * | 1977-03-08 | 1980-06-25 | Metalaids Processes Ltd | Tundish lining |
GB2085133A (en) * | 1980-10-14 | 1982-04-21 | London Scandinavian Metall | Refractory linings for metallurgical vessels |
JPS59118253A (ja) * | 1982-12-27 | 1984-07-07 | Shinagawa Rozai Kk | タンデイツシユボ−ドの施工方法 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 008, no. 238 (M - 335) 31 October 1984 (1984-10-31) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8546721B2 (en) | 2007-11-20 | 2013-10-01 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Seam position control for laser processing |
Also Published As
Publication number | Publication date |
---|---|
US20040011500A1 (en) | 2004-01-22 |
FR2840828A1 (fr) | 2003-12-19 |
KR20030096078A (ko) | 2003-12-24 |
AU2003204668A1 (en) | 2004-01-15 |
FR2840828B1 (fr) | 2004-09-17 |
BR0302070A (pt) | 2004-08-17 |
JP2004034156A (ja) | 2004-02-05 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL LT LV MK |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO. Owner name: THYSSENKRUPP NIROSTA GMBH Owner name: USINOR |
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17P | Request for examination filed |
Effective date: 20040408 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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18W | Application withdrawn |
Effective date: 20040821 |