EP1450972B1 - Procede et dispositif pour produire une bande metallique sur une machine de coulee en bande a rouleaux - Google Patents

Procede et dispositif pour produire une bande metallique sur une machine de coulee en bande a rouleaux Download PDF

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Publication number
EP1450972B1
EP1450972B1 EP02787916A EP02787916A EP1450972B1 EP 1450972 B1 EP1450972 B1 EP 1450972B1 EP 02787916 A EP02787916 A EP 02787916A EP 02787916 A EP02787916 A EP 02787916A EP 1450972 B1 EP1450972 B1 EP 1450972B1
Authority
EP
European Patent Office
Prior art keywords
casting
molten bath
cylinders
gas
bath
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.)
Expired - Lifetime
Application number
EP02787916A
Other languages
German (de)
English (en)
Other versions
EP1450972A2 (fr
Inventor
Heinrich Marti
Jacques Barbe
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.)
Main Management Inspiration AG
SMS Siemag AG
Original Assignee
Main Management Inspiration AG
SMS Demag AG
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.)
Filing date
Publication date
Application filed by Main Management Inspiration AG, SMS Demag AG filed Critical Main Management Inspiration AG
Publication of EP1450972A2 publication Critical patent/EP1450972A2/fr
Application granted granted Critical
Publication of EP1450972B1 publication Critical patent/EP1450972B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
    • B22D43/005—Removing slag from a molten metal surface

Definitions

  • the invention relates to a method for producing a metal strip by continuous casting of molten metal between two casting rolls of a strip casting, arranged at the casting rollers in the end face side seals, wherein by blowing gas to a forming during casting molten bath surface flow at least a surface of the melt Contains inclusions or impurities is generated such that these inclusions or impurities are conveyed in the direction of the casting rolls away to the middle level of the molten bath and to the side seals and a device for carrying out the method.
  • a layer of slag or impurities, inclusions and oxides can float on the surface of the molten bath between the casting rolls. There is a risk that they are flushed and pulled against the casting rolls by the turbulent surface of the molten bath, which causes irregularities on the strip surface and the quality of the strip is impaired.
  • the slag may also disadvantageously stick to the pouring tube immersed in the molten bath. Therefore, a timely removal of slag, z. B. by a moving on the melt surface skimmer, especially at longer casting times inevitable.
  • Document JP-A-60 170 562 discloses an apparatus for casting a metal strip between rolls with additional means for blowing away impurities on the bath surface towards the side dams.
  • the effect of this device is that contaminants on the melt surface are driven to both side dams by the gas jets exiting the oblique openings.
  • the document JP-A-2001-314946 describes a device in which two hollow bodies extending along the rollers are provided with exhaust openings.
  • the present invention has for its object to provide a method of the type mentioned above and an apparatus for performing the method, which allow for longer casting times a simple and reliable removal respectively channeling of the inclusions or impurities.
  • the slag can be pushed in a simple manner towards the side seals, where it is then solidified in the area of the ends of the band and later sawn away or possibly removed.
  • Fig. 1 shows schematically two rotatable about horizontal axes casting rolls 1, 2, whose directions of rotation are denoted by D 1 , D 2 .
  • the liquid metal is poured in between the two castings 1, 2 and two side seals 3 (see FIG. 2) arranged in the front side region of the casting rolls 1, 2 via a pouring device 6 from a container 5.
  • the container 5, the pouring device 6 and a cooling 8 comprehensive, the casting rolls 1, 2 and the side seals 3 enclosing housing box 7 are indicated in Fig. 1 and 2 only.
  • the molten bath is designated 4 in FIGS. 1 and 2 and its surface 4a.
  • the metal strip produced is led away through a passage gap 9 between the two cooled casting rolls 1, 2 in the direction of arrow B according to FIG.
  • the exit plane of the metal strip corresponds to the middle plane E of the molten bath 4, in which the pouring device 6 is located.
  • the transition edges of the casting roll surface / melt surface are designated K1, K2 ( Figures 1 and 5-7).
  • the pouring device 6 comprises in a conventional manner a projecting from the container bottom down, vertical G manrohrteil 10 and attached to this horizontal, box-shaped G manrohrteil 11; the latter is shown in Fig. 2 only indicated and shown in a possible embodiment in Fig. 7 in cross section.
  • the horizontal G manrohrteil 11 extends virtually over the entire length of the casting rolls 1, 2 to the side seals 3 and has two apparent from Fig. 7 longitudinal channels 15, 16, of which the lower longitudinal channel 15 connected to a central inlet opening 17 of the vertical Gellontzteils 10 is.
  • this lower longitudinal channel 15 melt is initially distributed over its entire length before it passes through a number of the two longitudinal channels 15, 16, distributed at equal intervals opening pairs 17 in the upper longitudinal channel 16, from which they then obliquely above, directed towards the periphery of the two casting rolls 1, 2, directed openings or pairs of openings 19 emerges.
  • These openings or pairs of openings 18 are - as the connecting openings 17 - evenly distributed over the entire length, and the melt flows in approximately equal amounts uniformly, distributed over the entire length, out of these openings 18 out.
  • In the lower longitudinal channel 15 can advantageously be deposited at best located in the melt solid particles.
  • the pouring device 6 is associated with a device 21 for slag rejection, as will be described below.
  • a heat-resistant material sleeve 26 is fixed with an annular, in particular from FIGS. 4 and 5 apparent, to the vertical G fondrohrteil 10 concentric gas chamber 27 is provided, in which a gas supply line 28 (Fig. 2, 3 and 4) opens.
  • the gas is preferably inert gas (argon, stock or a mixture), heated to about 200-300 ° C, fed under light pressure, this injection can be continuous, intermittent or pulsating.
  • An annular bottom 29 of the sleeve 26, which bounds the gas chamber 27 downwardly, is inclined a number of obliquely downwards and in the direction away from the vertical casting tube part 10, to the side seals 3, directed, small openings 30 from which the gas is blown in 30a designated rays on the molten bath surface 4a (see Fig. 2, 3, 4 and 5).
  • melt surface 4a are further two along the casting rolls 1, 2 or the transition edges K1, K2 (Giessrollenober Structure / Schmelzbadober Design) extending elongated hollow body 35, 36 arranged, for example, via a stiffening 37 (or more stiffeners) with each other or with Sleeve 26 are connected.
  • the interior of the hollow bodies 35, 36 forms gas channels into which gas is supplied in each case via a gas supply line 41, 42 under pressure and through which in the hollow bodies 35, 36 (or in bottom parts 35b, 36b thereof, cf. FIGS. 5 and 6).
  • Existing openings 45, 46 ( Figures 2, 5 and 6) are blown onto the molten bath surface 4a.
  • each hollow body 35, 36 (or each bottom part 35b, 36b) a number of evenly distributed over the entire length, downwardly directed openings 45 from which emerge designated 45a rays in a molten surface 4a substantially perpendicular plane and reach the molten bath surface 4a in the vicinity of the transition edges K1, K2.
  • these openings 45 are distributed over the entire length of the hollow body 35, 36, so also in the sleeve 26 adjacent, middle area available.
  • each hollow body 35, 36 is provided with a further number of obliquely downward toward the middle plane E of the molten bath 4 and at the same time to the respective nearest side seal 3 towards outlet openings 46, which are, however, distributed uniformly over only part of the total length and failing in the middle, the sleeve 26 adjacent area.
  • outlet openings 46 are, however, distributed uniformly over only part of the total length and failing in the middle, the sleeve 26 adjacent area.
  • the blown from these outlet openings 46 on the melt surface 4a Gas jets are designated 46a in FIGS. 2, 4 and 6. Also indicated in Fig. 3 is how these rays 46a touch the molten bath surface 4a.
  • the gas jets 46a directed obliquely downwards, causing the rejection of the slag to the side seals 3, are also directed towards the middle plane E of the molten bath 4, in a particularly preferred manner the flooding of the slag against the casting roll surfaces is counteracted.
  • a kind of protective wall is formed or shaft blocking is realized by the gas jets 45a directed onto the molten bath surface 4a near the transition edges K1, K2 in a vertical plane, in order to prevent this buildup, in particular due to wave formation.
  • the injection of gas according to the invention can also have a positive effect on the molten bath surface 4a, e.g. their flattening or calming can be achieved.
  • the pouring device 6 itself can also have gas openings or gas channels from which gas is blown in such a way that a surface flow causing the slag rejection and / or influencing the molten bath surface 4a is produced.
  • the horizontal casting tube part 11 may have an upper part 51 projecting out of the melt pool 4 and provided with a gas channel 52 running parallel to the longitudinal channels 15, 16 for the melt.
  • the upper part 51 also has a plurality of distributed over the entire length of the Giessrohrmaschines 11, in pairs and mirror images of the central plane E of the molten bath 4 arranged gas outlet openings 55, directed from the gas channel 52 obliquely downward to the melt surface 4a and the casting rolls 1, 2 out are.
  • the melt surface 4a can, as it were, be smoothed at the points influenced by the melt outlet (openings 18).
  • the already mentioned, downwardly directed gas jets 45a in front of the transitional edges K1, K2 in turn protect the G confuserollenoberfest before the flooding of the slag.
  • the gas jets 55a exiting here could also contribute to the slag removal according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (5)

  1. Procédé de fabrication d'une bande métallique par coulée continue de métal en fusion entre deux cylindres de coulée (1, 2) d'une machine de coulée en bande comportant des garnitures latérales (3) disposées dans la région latérale avant des cylindres de coulée (1, 2), un écoulement de surface au moins des inclusions ou impuretés en fusion étant généré en soufflant du gaz sur la surface (4a) d'un bain de fusion se formant pendant la coulée de telle sorte que ces inclusions ou impuretés sont transportées dans le sens opposé aux cylindres de coulée (1, 2) en direction du plan médian (E) du bain de fusion (4) et en direction des garnitures latérales (3),
    caractérisé en ce que
    une paroi de protection perpendiculaire, qui empêche le rejet des inclusions ou impuretés sur la surface des cylindres de coulée, est formée par des jets de gaz (45a) sur la surface (4a) du bain de fusion le long de chacun des deux cylindres de coulée (1, 2), près des bords de transition (K1, K2) entre la surface (4a) du bain de fusion et la surface des cylindres de coulée.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le gaz soufflé sous pression sur la surface (4a) du bain de fusion est un gaz inerte, avantageusement de l'argon ou de l'azote, chauffé à 200°-300°C, ce soufflage étant effectué de façon continue, intermittente et/ou pulsée.
  3. Dispositif destiné à mettre en oeuvre le procédé selon la revendication 1, ledit dispositif comprenant un dispositif d'injection (6) permettant de couler en continu du métal en fusion entre deux cylindres de coulée (1, 2) ainsi que deux garnitures latérales (3), disposées dans la région latérale avant des cylindres de coulée (1, 2) d'une machine de coulée en bande à cylindres, un dispositif d'injection (6) étant associé un dispositif (25) destiné à rejeter les inclusions ou les impuretés qui comporte au moins un canal de gaz (35, 36 ; 52) disposé au-dessus de la surface (4a) du bain de fusion, s'étendant dans la direction longitudinale des cylindres de coulée (1, 2) et conformé en corps creux, ledit canal de gaz comportant un certain nombre d'ouvertures de sortie (46 ; 55) réparties sur toute sa longueur et orientées obliquement vers le bas en direction de la garniture latérale (3) la plus proche,
    caractérisé en ce que
    un corps creux (35, 36), comportant un certain nombre d'ouvertures de sortie réparties uniformément sur toute sa longueur, est doté de chaque côté du dispositif d'injection (6) d'ouvertures (45) orientées vers le bas, les ouvertures (45) étant placées dans un plan s'étendant sensiblement perpendiculairement à la surface (4a) du bain de fusion et situées près du bord de transition respectif (K1, K2) entre la surface du bain de fusion et la surface des cylindres de coulée.
  4. Dispositif selon la revendication 3, caractérisé en ce qu'une pièce tubulaire horizontale de coulée (11), qui s'étend dans la direction longitudinale des cylindres de coulée (1, 2) et qui est située dans le plan médian (E) du bain de fusion (4), fait saillie, au niveau de sa partie supérieure (51), du bain de fusion (4) et comporte, dans cette partie (51) saillant du bain de fusion (4), le canal de gaz (52) doté d'ouvertures de sortie (55) orientées obliquement vers le bas et en direction des garnitures latérales (3) les plus proches.
  5. Dispositif selon la revendication 4, caractérisé en ce que deux ouvertures de sortie (55) sont disposées symétriquement de chaque côté du plan médian (E) du bain de fusion (4), des conduites de gaz (58) qui s'étendent le long des cylindres de coulée (1, 2) et qui sont dotées d'ouvertures de sortie orientées vers le bas et situées dans un plan sensiblement perpendiculaire à la surface (4a) du bain de fusion, étant prévues près des bords de transition (K1, K2) entre la surface (4a) du bain de fusion et la surface des cylindres de coulée au-dessus de la surface (4a) du bain de fusion.
EP02787916A 2001-12-10 2002-12-06 Procede et dispositif pour produire une bande metallique sur une machine de coulee en bande a rouleaux Expired - Lifetime EP1450972B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH22522001 2001-12-10
CH02252/01A CH695600A5 (de) 2001-12-10 2001-12-10 Verfahren sowie eine Vorrichtung zur Herstellung eines Metallbandes an einer Rollen-Bandgiessmaschine.
PCT/EP2002/013849 WO2003049888A2 (fr) 2001-12-10 2002-12-06 Procede et dispositif pour produire une bande metallique sur une machine de coulee en bande a rouleaux

Publications (2)

Publication Number Publication Date
EP1450972A2 EP1450972A2 (fr) 2004-09-01
EP1450972B1 true EP1450972B1 (fr) 2006-08-16

Family

ID=4568224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787916A Expired - Lifetime EP1450972B1 (fr) 2001-12-10 2002-12-06 Procede et dispositif pour produire une bande metallique sur une machine de coulee en bande a rouleaux

Country Status (6)

Country Link
EP (1) EP1450972B1 (fr)
AT (1) ATE336315T1 (fr)
AU (1) AU2002352223A1 (fr)
CH (1) CH695600A5 (fr)
DE (1) DE50207883D1 (fr)
WO (1) WO2003049888A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009140762A1 (fr) * 2008-05-22 2009-11-26 Novelis Inc. Rétention des oxydes au cours du comoulage de métaux

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT414103B (de) * 2003-05-19 2006-09-15 Voest Alpine Ind Anlagen Verfahren zur herstellung eines gegossenen metallbandes und zweiwalzengiesseinrichtung hierzu
CN108015243B (zh) * 2016-10-31 2019-12-31 宝山钢铁股份有限公司 一种双辊薄带连铸用吹气布流装置
CN110834087A (zh) * 2019-11-06 2020-02-25 李甫鸣 一种基于磁感应和伯努利原理的铝灰去除装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170562A (ja) * 1984-02-13 1985-09-04 Mitsubishi Heavy Ind Ltd 薄板連続鋳造装置
JPH04197560A (ja) * 1990-11-29 1992-07-17 Nippon Yakin Kogyo Co Ltd 金属薄板の連続鋳造方法
JP2001314946A (ja) * 2000-03-03 2001-11-13 Nippon Steel Corp 薄鋳片連続鋳造方法及び装置
JP4473466B2 (ja) * 2001-04-16 2010-06-02 新日本製鐵株式会社 薄帯鋳片連続鋳造方法及び装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009140762A1 (fr) * 2008-05-22 2009-11-26 Novelis Inc. Rétention des oxydes au cours du comoulage de métaux
US8336603B2 (en) 2008-05-22 2012-12-25 Novelis Inc. Oxide restraint during co-casting of metals

Also Published As

Publication number Publication date
EP1450972A2 (fr) 2004-09-01
DE50207883D1 (de) 2006-09-28
ATE336315T1 (de) 2006-09-15
CH695600A5 (de) 2006-07-14
AU2002352223A8 (en) 2003-06-23
AU2002352223A1 (en) 2003-06-23
WO2003049888A3 (fr) 2003-07-31
WO2003049888A2 (fr) 2003-06-19

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