EP1521650A2 - Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres - Google Patents
Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindresInfo
- Publication number
- EP1521650A2 EP1521650A2 EP03750805A EP03750805A EP1521650A2 EP 1521650 A2 EP1521650 A2 EP 1521650A2 EP 03750805 A EP03750805 A EP 03750805A EP 03750805 A EP03750805 A EP 03750805A EP 1521650 A2 EP1521650 A2 EP 1521650A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lining
- recess
- insert
- side face
- front face
- 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
- B22D11/06—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
- B22D11/0648—Casting surfaces
- B22D11/066—Side dams
-
- 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
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
-
- 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
Definitions
- the invention relates to the continuous casting of metals. It relates more particularly to the continuous casting installations of thin metallic strips of the type called “castings between cylinders", and more precisely to their refractory side faces which seal the casting space.
- the casting of thin metal strips a few mm thick directly from liquid metal can take place on a so-called “casting between cylinders" installation, supplied with liquid metal from a distributor by means of a pouring nozzle.
- the machine comprises an ingot mold, the casting space of which is delimited on its long sides by a pair of internally cooled cylinders with parallel horizontal axes and rotating around these axes in opposite directions, and on its short sides by closure plates (called side faces) of refractory material, applied 'against the flat ends of the cylinders.
- Solidification of the liquid metal must only occur on the cooled cylindrical surfaces of the cylinders, by the formation of solidified skins which are made to join at the level of the neck (the area where the distance between the surfaces of the cylinders is minimal) to the strip, which is continuously extracted from the casting space.
- parasitic solidifications that is to say layers of solidified metal which arise on certain zones of the lateral faces. They are due to the fact that the liquid metal surrounding these zones may be at a temperature substantially lower than its nominal temperature and therefore be capable of solidifying locally on contact with the lateral faces. This low temperature may be due to unfavorable hydrodynamic conditions which do not allow sufficient renewal of the liquid metal in these zones, or to an insufficient temperature of the side faces due to poor preheating before casting. Of course, several of these factors can combine.
- Another method consists in providing a permanent heating of the lateral faces during casting, by means of burners or induction furnaces, or also also an induction heating of the metal in their vicinity. This however causes complications in the construction of the lateral face and in the management of its functioning.
- Another method consists in playing on the composition of the refractories of the lateral face, by placing opposite the casting space of the fibrous refractories based on silica, alumina or other oxides, having strong insulating properties.
- These highly insulating refractories can extract only a relatively small amount of heat from the liquid metal and thus limit the risk of parasitic solidifications.
- their hardness is low, and they therefore withstand friction well against the cylinders, and also against the metal solidified or being solidified in the vicinity of the neck.
- the object of the invention is to propose a design of lateral faces of a casting of thin strips between two cylinders making it possible to limit, better than existing designs, the appearance of parasitic solidifications.
- the subject of the invention is a lateral face for installation for the continuous casting of metal strips between two counter-rotating cylinders with horizontal axes, internally cooled, the surfaces of which delimit a pouring space closed laterally by two lateral faces of refractory material, of the type comprising:
- the front face facing the casting space of said lining can be set back relative to the front face of the insert over its entire height.
- the lining has a constant thickness, and on a height "h 2 ", the lining has a thickness increasing to a level where said thickness is equal to that of the insert.
- Said level where said thickness is equal to that of the insert may be the lower edge of the recess.
- the lining may have an increasing thickness from the upper edge of the recess to the lower edge of the recess.
- the distance is preferably 5mm or more.
- the side face may include an appendage across the width of the front face of the lining, said appendage being intended to overhang the surface of the liquid metal present in the casting space.
- the invention essentially consists in placing the front surface of the insulating refractory lining of the lateral face substantially set back with respect to the front surface of the part in hard refractory, and this on at least the largest part of the height of the filling.
- FIG. 1a which schematically represents the front face of a first variant of lateral face 1 according to the invention
- the dimensions are not to scale, for reasons of clarity of the illustration of the principle of the invention .
- the diameters of the rotating cylinders, including the contours 2, 2 ′ of the external surfaces, when the lateral face 1 is in the working position are shown in dashed lines, range from 500 to 1500mm, while at level 3 where the neck is located, the width of the space which separates the external surfaces of the cylinders is equal to the thickness of the cast strip, namely a few mm, at most 10mm.
- the nominal level 4 also reached by the dotted line reached by the surface of the liquid metal present in the casting space, and also the contours 5 of the solidified strip which is extracted from the installation. In the casting space, liquid metal is therefore likely to be over a height "h" between the nominal level 4 of the surface of the liquid metal and level 3 of the neck.
- the side face 1 is composed of the following elements:
- a part 9 (which may be in one or more parts), called an “insert” arranged on the periphery of the recess 7 (except on the upper edge of the recess 7); it faces the areas surrounding the edges of the cylinders and the area 10 surrounding the neck; in general, this insert 9 must face all the parts of the lateral face 1 which are called upon to be in contact with the edges of the cylinders and the skins solidified in areas where sealing of the casting space is essential; so that this sealing is carried out permanently, despite the friction to which the insert 9 is subjected, this insert 9 must be made of a hard refractory material having a high resistance to mechanical wear and corrosion by the cast metal, such as than SiAION ® or BN, even if its high compactness should give it relatively poor insulating properties;
- a lining 11 which fills the rest of the bottom of the recess 7, and therefore ensures most of the contacts between the side face 1 and the liquid metal;
- this lining 11 is made of a refractory material with high insulating properties, such as silica foam, fibrous silica, fibrous alumina, zirconia in cast form ... and may have lower mechanical and chemical properties than those of the insert 9.
- the insert 9 and the lining 11 constitute what may be called the "active part" of the side face 1, in that they ensure the confinement of the liquid metal between the cylinders and the essential for sealing the pouring space.
- the front surfaces of the insert 9 and of the lining 11 are in the exact extension of one another.
- the front surface 12 of the lining 11 is substantially set back from a maximum distance "d" relative to the front surface 13 of the insert 9.
- the lining 11 Over a height "hi" from the upper edge of the recess 7, the lining 11 has a substantially constant thickness "e". This means that the front surface 12 of the lining 11 is set back a distance equal to "d" over this entire height "hi”. Then over a height "h 2 ", this thickness gradually increases so that at the lower edge 14 of the recess 7, this thickness is equal to that of the insert 9, as can be seen on the fig.lc. In this figure, a linear growth of this thickness has been shown, giving a flat shape to the front surface 12 of the lining 11 in the zone considered. But other variants are possible, for example a growth in the thickness of the lining 11 which would give a curved shape to the front surface 12.
- the presence of a portion of height "h 2 " on which the thickness of the lining increases until it becomes substantially equal to that of insert 13 is, if not completely essential, at least highly recommended. Otherwise, the insert 9 offers a sharp angle to the liquid metal, and there is a risk of rapid erosion of the upper part of the insert 9 in the zone 10 surrounding the neck, which would be unfavorable to the regularity of the conditions of casting and solidification of the strip.
- the distance "d” is of the order of at least 10 mm and can reach several tens of mm, or even a few hundred mm (for example 250 mm), preferably from 80 to 150 mm.
- "H 2 " is typically (but not limited to) of the order of 1.5 xd, so as to impose on the front surface 12 of the lining 11 in the area considered an average inclination of approximately 45 ° relative to the vertical.
- the thickness of the lining 11 increases from the upper edge of the recess 7, in other words that "hi" is equal to 0.
- the lateral face 1 Compared to the lateral faces of the prior art, the lateral face 1 according to the invention has the following advantages.
- the parasitic solidifications which could occur on the lining 11 are carried far back from the lower part of the casting space. If the resulting solid metal is entrained in the bottom of the casting space, it has more time to melt than in the prior art. This significantly reduces the risk of casting incidents related to the passage of unwanted solid metal at level 3 of the neck.
- the casting space no longer has a width substantially equal to that of the casting strip, but greater by a value equal to twice "d ".
- This upper surface of the liquid metal therefore has a larger area than what is usually encountered for a given width of the cast strip.
- impurities non-metallic inclusions, refractory particles torn off from the lateral faces, etc.
- they have the possibility of being housed in the vicinity of the lateral faces 1, in zones of width “d” which are not located vertically above the strip being solidified.
- the increase in the area of the upper surface of the liquid metal caused by the use of a side face 1 according to the invention results in a possible increase in the heat losses by radiation of the liquid metal located in the space of casting.
- this drawback is minimal if, as is almost always the case, the casting space is covered by a cover which returns the radiation to the metal.
- the lining 11 comprises over the width of its front face 12 a substantially horizontal appendage 15 placed just above the maximum level 4 of the liquid metal, so as to overhang it over a distance equal, for example, to "d".
- This appendix 15 can, moreover, be used to rest the cover there, as described in document EP-A-0 875 315 in the case of conventional side faces.
- the appendix 15 is located at the upper edge of the lining 11. But it could just as easily be located a little lower, the main thing being that it is always above the surface of the metal liquid present in the casting space, so as to return the radiation it receives.
- FIGS. 2a-2d the elements common with the variant in Figure 1 are identified by the same references.
- this variant there is a height h 3 located between the lower edge 14 of the recess 7 and a level 16 located above said edge 14 where the front surfaces 12 of the lining 11 and 13 of the insert 9 are aligned.
- this height h 3 can vary between a few mm and a few cm, depending in particular on the possibility of avoiding the appearance of parasitic solidifications in this area thanks, for example, to a suitable geometry of the pouring nozzle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0208853 | 2002-07-12 | ||
FR0208853A FR2842130B1 (fr) | 2002-07-12 | 2002-07-12 | Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres |
PCT/FR2003/002221 WO2004007116A2 (fr) | 2002-07-12 | 2003-07-11 | Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1521650A2 true EP1521650A2 (fr) | 2005-04-13 |
EP1521650B1 EP1521650B1 (fr) | 2012-01-25 |
Family
ID=29763826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03750805A Expired - Lifetime EP1521650B1 (fr) | 2002-07-12 | 2003-07-11 | Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres |
Country Status (11)
Country | Link |
---|---|
US (1) | US7258157B2 (fr) |
EP (1) | EP1521650B1 (fr) |
JP (1) | JP4418749B2 (fr) |
KR (1) | KR101069609B1 (fr) |
CN (1) | CN1299856C (fr) |
AT (1) | ATE542621T1 (fr) |
AU (1) | AU2003269022B2 (fr) |
FR (1) | FR2842130B1 (fr) |
MX (1) | MXPA05000390A (fr) |
RU (1) | RU2305611C2 (fr) |
WO (1) | WO2004007116A2 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8042601B2 (en) * | 2006-03-24 | 2011-10-25 | Nucor Corporation | Side dam with insert |
US7556084B2 (en) * | 2006-03-24 | 2009-07-07 | Nucor Corporation | Long wear side dams |
US7503375B2 (en) * | 2006-05-19 | 2009-03-17 | Nucor Corporation | Method and apparatus for continuously casting thin strip |
US8191610B2 (en) * | 2008-11-24 | 2012-06-05 | Nucor Corporation | Strip casting apparatus with improved side dam |
US7888158B1 (en) * | 2009-07-21 | 2011-02-15 | Sears Jr James B | System and method for making a photovoltaic unit |
JP5837758B2 (ja) | 2011-04-27 | 2015-12-24 | キャストリップ・リミテッド・ライアビリティ・カンパニー | 双ロール鋳造装置及びその制御方法 |
US20140008032A1 (en) * | 2012-07-01 | 2014-01-09 | Nucor Corporation | Side dam with insert |
US10046384B2 (en) * | 2015-09-30 | 2018-08-14 | Nucor Corporation | Side dam with pocket |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60221155A (ja) * | 1984-04-17 | 1985-11-05 | Ishikawajima Harima Heavy Ind Co Ltd | 連続鋳造装置 |
FR2636259B1 (fr) * | 1988-09-14 | 1994-03-11 | Irsid | Paroi laterale pour une installation de coulee continue entre parois mobiles et installation comportant cette paroi |
FR2652021A1 (fr) * | 1989-06-15 | 1991-03-22 | Siderurgie Fse Inst Rech | Paroi d'obturation laterale pour une installation de coulee continue entre parois mobiles. |
FR2655577B1 (fr) * | 1989-12-07 | 1992-01-24 | Siderurgie Fse Inst Rech | Installation de coulee continue de produits metalliques minces entre deux cylindres. |
FR2656244A1 (fr) * | 1989-12-26 | 1991-06-28 | Siderurgie Fse Inst Rech | Dispositif de coulee continue de produits metalliques minces entre deux cylindres refroidis en rotation. |
FR2666256B1 (fr) * | 1990-09-03 | 1992-10-16 | Usinor Sacilor | Installation de coulee continue entre cylindres. |
JPH04133849A (ja) * | 1990-09-27 | 1992-05-07 | Nisshinbo Ind Inc | マスタシリンダ |
CN1038912C (zh) * | 1991-08-28 | 1998-07-01 | 上海钢铁研究所 | 双辊连铸金属薄带的方法 |
ATE166266T1 (de) * | 1994-08-01 | 1998-06-15 | Vesuvius France Sa | Seitenwand für eine stranggiessvorrichtung zum giessen von dünnblechen |
IT1284201B1 (it) * | 1996-07-31 | 1998-05-08 | Sviluppo Materiali Spa | Piastre con riporti ceramici antiusura per macchine per colata conntinua di corpi piani sottili e procedimento per la loro |
FR2762534B1 (fr) * | 1997-04-29 | 1999-05-28 | Usinor | Installation de coulee continue de bandes metalliques entre deux cylindres |
FR2765504B1 (fr) * | 1997-07-04 | 1999-08-20 | Usinor | Face laterale d'obturation de l'espace de coulee d'une installation de coulee continue entre cylindres de bandes minces metalliques |
FR2768354B1 (fr) * | 1997-09-12 | 1999-10-22 | Usinor | Face laterale pour l'obturation de l'espace de coulee d'une installation de coulee continue de bandes metalliques entre cylindres, et installation de coulee ainsi equipee |
FR2785211B1 (fr) * | 1998-11-03 | 2001-03-09 | Usinor | Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres |
JP2000246401A (ja) * | 1999-03-04 | 2000-09-12 | Nippon Steel Corp | 双ドラム式連続鋳造装置のサイド堰 |
-
2002
- 2002-07-12 FR FR0208853A patent/FR2842130B1/fr not_active Expired - Fee Related
-
2003
- 2003-07-11 KR KR1020057000446A patent/KR101069609B1/ko active IP Right Grant
- 2003-07-11 AT AT03750805T patent/ATE542621T1/de active
- 2003-07-11 MX MXPA05000390A patent/MXPA05000390A/es active IP Right Grant
- 2003-07-11 US US10/519,750 patent/US7258157B2/en not_active Expired - Lifetime
- 2003-07-11 RU RU2005103635/02A patent/RU2305611C2/ru not_active IP Right Cessation
- 2003-07-11 EP EP03750805A patent/EP1521650B1/fr not_active Expired - Lifetime
- 2003-07-11 AU AU2003269022A patent/AU2003269022B2/en not_active Ceased
- 2003-07-11 WO PCT/FR2003/002221 patent/WO2004007116A2/fr active Application Filing
- 2003-07-11 JP JP2004520784A patent/JP4418749B2/ja not_active Expired - Fee Related
- 2003-07-11 CN CNB038164353A patent/CN1299856C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004007116A2 * |
Also Published As
Publication number | Publication date |
---|---|
JP2005536352A (ja) | 2005-12-02 |
JP4418749B2 (ja) | 2010-02-24 |
MXPA05000390A (es) | 2005-03-23 |
EP1521650B1 (fr) | 2012-01-25 |
US20060081352A1 (en) | 2006-04-20 |
CN1299856C (zh) | 2007-02-14 |
WO2004007116A3 (fr) | 2004-04-08 |
KR101069609B1 (ko) | 2011-10-05 |
FR2842130A1 (fr) | 2004-01-16 |
CN1668404A (zh) | 2005-09-14 |
US7258157B2 (en) | 2007-08-21 |
AU2003269022B2 (en) | 2009-10-01 |
RU2005103635A (ru) | 2005-07-27 |
FR2842130B1 (fr) | 2004-10-15 |
RU2305611C2 (ru) | 2007-09-10 |
ATE542621T1 (de) | 2012-02-15 |
WO2004007116A2 (fr) | 2004-01-22 |
AU2003269022A1 (en) | 2004-02-02 |
KR20050045985A (ko) | 2005-05-17 |
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