EP0765702B1 - Busette pour l'introduction d'un métal liquide dans une lingotière de coulée continue des métaux - Google Patents

Busette pour l'introduction d'un métal liquide dans une lingotière de coulée continue des métaux Download PDF

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Publication number
EP0765702B1
EP0765702B1 EP96401849A EP96401849A EP0765702B1 EP 0765702 B1 EP0765702 B1 EP 0765702B1 EP 96401849 A EP96401849 A EP 96401849A EP 96401849 A EP96401849 A EP 96401849A EP 0765702 B1 EP0765702 B1 EP 0765702B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
metal
obstacle
liquid metal
tubular
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
EP96401849A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0765702A1 (fr
Inventor
Jean Michel Damasse
Laurent Gacher
Luc Vendeville
Gérard Raisson
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.)
Thyssen Stahl AG
USINOR SA
Original Assignee
Thyssen Stahl AG
USINOR SA
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 Thyssen Stahl AG, USINOR SA filed Critical Thyssen Stahl AG
Publication of EP0765702A1 publication Critical patent/EP0765702A1/fr
Application granted granted Critical
Publication of EP0765702B1 publication Critical patent/EP0765702B1/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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • B22D41/502—Connection arrangements; Sealing means therefor

Definitions

  • the invention relates to the continuous casting of metals, in particular steel. More specifically, it relates to tubes made of refractory material called "nozzles" which, usually are connected by their upper end to the container used for liquid metal reservoir, the lower end of which dips into the metal bath liquid contained in the ingot mold where the solidification of the product must begin metallic.
  • nozzles tubes made of refractory material which, usually are connected by their upper end to the container used for liquid metal reservoir, the lower end of which dips into the metal bath liquid contained in the ingot mold where the solidification of the product must begin metallic.
  • the primary role of these nozzles is to protect from oxidation atmospheric the jet of liquid metal on its path between the container and the mold. They also allow, thanks to appropriate configurations of their end lower, to favorably direct the flow of liquid metal in the mold so that the solidification of the product takes place under the best possible conditions.
  • the casting can take place in an ingot mold which must give the product a very elongated rectangular section, which usually designates it by the expression "flat product”.
  • This is the case when, in the steel industry, steel is poured under slab shape, i.e. products about 1 to 2 m wide and a thickness generally of the order of 20 cm, but which can go down to a few cm on certain recent installations called “thin slab casting machines”.
  • the ingot mold is composed of fixed walls which are energetically cooled on their face which is not in contact with metal. We are also experimenting with installations making it possible to obtain, directly by solidification of the liquid metal, steel strips a few mm thick.
  • the casting space is delimited on its long sides by a pair of cooled cylinders internally with parallel horizontal axes and rotating around these axes in a direction inverses, and on its short sides by closing plates (called lateral faces) made of refractory material applied against the ends of the cylinders.
  • Cylinders can also be replaced by cooled endless belts.
  • the first part is composed of a cylindrical tube whose upper end is connected to an opening in the bottom of the distributor which constitutes the reserve of liquid steel feeding the ingot mold, orifice which can be closed at will by the operator, partially or totally, thanks to a stopper or a drawer system ensuring the regulation of the metal flow.
  • the section of this orifice depends on the flow maximum of metal that can flow inside the nozzle.
  • the second part fixed at the lower end of the previous tube, for example by screwing, is intended to be immersed in the bath of liquid metal present in the mold.
  • She is composed a hollow element inside which opens the lower orifice of the cylindrical tube previous.
  • the interior space of this hollow element has a generally elongated shape in its terminal part and is oriented substantially perpendicular to the tube.
  • the hollow element is placed parallel to the long sides of the ingot mold, and the liquid metal flows into the ingot mold through two orifices made at each of the ends of the elongated end part of the hollow element, and called "hearing".
  • the object of the invention is to provide metallurgists with nozzles which ensure quieter and more fluid metal flow conditions in the mold regular than the nozzles usually used when pouring products metallurgical continuously.
  • the invention relates to a nozzle for the introduction of a metal liquid in a continuous metal casting ingot mold, of the type comprising a first tubular part, one end of which is intended to be connected to a container containing said liquid metal, and the other end of which opens into a second hollow part, at least a portion of the interior space of which is oriented substantially perpendicular to said first tubular part, said portion comprising at each of its ends at least one orifice intended to open into the casting space of said ingot mold, characterized in that it comprises an obstacle placed on the path of the liquid metal inside said first tubular part or in its extension, said obstacle consisting of at least one perforated part intended to divert the metal from its preferential path inside the nozzle.
  • said obstacle consists of at minus one patch perforated by a multiplicity of holes.
  • said obstacle consists of a hollow part, provided with a bottom, penetrating into the interior space of said second part of the nozzle, said hollow part having openings on its side wall.
  • the interior space of the assembly of the nozzle has the general shape of a T.
  • the invention consists in interposing on the course of the liquid metal an obstacle intended to impede its natural flow, by deviating brutally this flow of its theoretical preferential trajectory and by reducing locally the section of space available for the passage of metal.
  • This has the effect, at equal metal flow, limit the speed of flow and improve filling of the interior space of the nozzle as a whole. This reduces variations erratic in the conditions of the flow of metal out of the nozzle, and the symmetry of the flows in the right and left halves of the mold and the regularity in time of these flows are significantly improved.
  • the nozzle 1 is formed, as in the previously cited prior art, of two main parts made of a refractory material such as graphite alumina, which here are assembled to each other by screwing the first into the second.
  • the first part comprises a cylindrical or substantially cylindrical tube 2, of which the interior space 3 constitutes the path for the passage of the liquid metal.
  • This tube 2 is normally intended to be held vertically.
  • Its upper part no shown is intended to be connected to a container serving as a metal reservoir liquid, such as a continuous flow distributor, at an orifice through which the metal liquid can flow with a flow that the operator regulates by means of a stopper or of a drawer device.
  • the lower end 4 of the tube 2 has a thread 5 on its outer wall, and this thread 5 makes it possible to assemble it to the second part of the nozzle 1.
  • This second part is composed of a hollow element 6 which, in the example described and shown, externally has the shape of an inverted T.
  • Interior space 7 of the hollow element 6, also in the form of an inverted T thus comprises a portion cylindrical 8 extending the interior space 3 of the tube 2.
  • the upper zone of this cylindrical portion 8 has a flare 9, the wall of which is threaded, so as to ability to screw the lower end 4 of the tube 2.
  • the cylindrical portion 8 opens out in a tubular portion 10 which is substantially perpendicular thereto, of section approximately circular, oval or rectangular.
  • Each end of this tubular portion 29 has an orifice 11, 11 'called "hearing", through which the metal liquid can flow out of the nozzle.
  • these vents 10, 11 are intended to be permanently maintained under the surface of the filling liquid metal casting space.
  • the cylindrical portion 8 of the interior space 7 of the element hollow 6 has, inside the flare 9 and under the thread of its wall, a housing 12, in which, prior to the assembly of the two parts 2, 6 of the nozzle 1, a stack of three pellets of refractory material can be placed: a upper pad 13, an intermediate pad 14 and a lower pad 15.
  • the respective dimensions of the housing 12 and the pads 13, 14, 15 are chosen such that so that, after assembly of the nozzle 1, the lower end of the tube 2 comes in abutment against the upper pad 13.
  • the upper pad 13 has a certain number of perforations 16, distributed over the portion of its surface intended to be located at plumb with the interior space 3 of the tube 2.
  • the intermediate patch 14 has a single perforation 17 of shape, for example, square or circular, opening at less equal to that of the interior space 3 of the tube 2. Its role is, in fact, that of a spacer used to separate the upper 13 and lower 15 pellets. also has a number of perforations 18, which may be different in number and in size of the perforations 16 of the upper patch 13. But it is important, for obtaining the desired results, that the perforations 16 and 18 are noticeably offset from each other, so that a fraction as small as possible of the liquid metal has the theoretical possibility of cross the obstacle constituted by all the pellets 13, 14, 15 without hitting them. For a better obstacle efficiency, it is also preferable that the tablet upper 13 does not have a perforation in its center, where the probability of presence of liquid metal is most important, so as to slow down the pouring jet as early as possible.
  • the total section of the orifices of a given patch should not not be less than the cross section of the distributor outlet, to ensure that we can always sink with a maximum metal flow as high as in the absence obstacle.
  • the bottom 19 of the hollow element 6 is equipped with perforations 20 called “leak holes”.
  • These leakage holes 20 have for usual functions of deflecting part of the metal flows towards the lower part of the mold. This deviation limits the flow rate and the exit speed of the metal at the gills 11, 11 ′ and thus prevents the metal from hitting violently the small sides of the mold and disturb the conditions of solidification. In the case of casting between cylinders, this also makes it possible to avoid excessive deterioration of the refractory side faces.
  • these holes leak 20 ensure a regular supply of hot metal to the lower part of the casting space, directly above the nozzle 1: here again, this goes in the direction of better control of solidification conditions.
  • the pellets must be made of a refractory material such as zirconia, in any case compatible with the nature of the cast metal to prevent them from being excessively chemically attacked by the metal.
  • pellet obstacle which has just been described is not than a non-limiting example.
  • the obstacle inserted in the nozzle 1 is constituted by a tubular part 21, provided with a bottom 22 at one of its ends. At its end open, this tubular part 21 has a shoulder 23 which can be inserted in the housing 12 formed in the hollow element 6 and which contained the pellets 13, 14, 15 in the example of implementation of the preceding invention.
  • the tubular part 21 On its side wall 24, the tubular part 21 has perforations 25, 26, 27 which allow the metal liquid to pass from the interior space 28 of the tubular part 21 to the interior space 7 of the hollow element 6, after having lost a large part of its potential energy.
  • these perforations 25, 26, 27 are the number of six distributed in three levels over the height of the tubular piece 21, and are shaped approximately oval. They preferentially make it possible to orient the liquid metal on the side wall of the cylindrical portion 8 of the interior space 7 of the hollow element 6. In this way, the impact of the metal against this side wall provides absorption of energy which is added to that undergone inside the tubular part 21. Similarly, for obtain a residence time of the metal in the nozzle 1 as long and uniform as possible, it is preferable that, as shown, the orientation of these perforations is perpendicular to the orientation of the vents 11, 11 '.
  • a tubular piece 21, the interior space 28 of which would have a length of 84 mm, diameter of 30 mm, perforations 25, 26, 27 of 10x20 mm, have an influence on the speed and regularity of metal flows substantially comparable to that of the pellets 13, 14, 15 of the obstacle described and shown in Figures 1a to 1d, if it was inserted into an identical nozzle 1.
  • the invention is not limited in its application to the field of casting continues flat steel products (slabs, thin slabs, thin strips), even if it finds there a privileged application. It can be applied to many others examples of continuous casting nozzles of all metals in all formats, for which one wishes to obtain a slowing down of the flows providing a better filling of the nozzle and, consequently, greater stability of the flows of the liquid metal coming out of it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Nozzles (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP96401849A 1995-09-28 1996-08-29 Busette pour l'introduction d'un métal liquide dans une lingotière de coulée continue des métaux Expired - Lifetime EP0765702B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9511375 1995-09-28
FR9511375A FR2739313B1 (fr) 1995-09-28 1995-09-28 Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue des metaux

Publications (2)

Publication Number Publication Date
EP0765702A1 EP0765702A1 (fr) 1997-04-02
EP0765702B1 true EP0765702B1 (fr) 1999-05-26

Family

ID=9483001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401849A Expired - Lifetime EP0765702B1 (fr) 1995-09-28 1996-08-29 Busette pour l'introduction d'un métal liquide dans une lingotière de coulée continue des métaux

Country Status (24)

Country Link
US (1) US5733469A (ru)
EP (1) EP0765702B1 (ru)
JP (1) JP3978794B2 (ru)
KR (1) KR100369257B1 (ru)
CN (1) CN1064286C (ru)
AT (1) ATE180427T1 (ru)
AU (1) AU702389B2 (ru)
BR (1) BR9603908A (ru)
CA (1) CA2186084C (ru)
CZ (1) CZ285931B6 (ru)
DE (1) DE69602565T2 (ru)
DK (1) DK0765702T3 (ru)
ES (1) ES2132857T3 (ru)
FR (1) FR2739313B1 (ru)
GR (1) GR3030610T3 (ru)
MX (1) MX9604288A (ru)
PL (1) PL181356B1 (ru)
RO (1) RO117242B1 (ru)
RU (1) RU2163179C2 (ru)
SK (1) SK281773B6 (ru)
TR (1) TR199600774A2 (ru)
TW (1) TW345508B (ru)
UA (1) UA42764C2 (ru)
ZA (1) ZA968126B (ru)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767082B1 (fr) * 1997-08-06 1999-10-29 Vesuvius France Sa Busette de coulee pour le transfert d'un metal liquide d'un repartiteur dans une lingotiere
FR2769862B1 (fr) * 1997-10-20 1999-11-19 Usinor Busette de coulee pour installation de coulee continue des metaux, notamment de coulee entre cylindres
FR2777485B1 (fr) * 1998-04-16 2000-05-19 Usinor Busette pour l'indroduction de metal liquide dans une lingotiere de coulee continue des metaux
GB9906116D0 (en) * 1999-03-17 1999-05-12 Didier Werke Ag Refractory product
US6425505B1 (en) 1999-09-03 2002-07-30 Vesuvius Crucible Company Pour tube with improved flow characteristics
CH691762A5 (de) * 2000-06-28 2001-10-15 Main Man Inspiration Ag Zwischenbehälter mit einer feuerfesten Giessrohreinheit für das Abgiessen von Metallschmelze in eine Bandgiessmaschine sowie eine Giessrohreinheit.
FR2818567B1 (fr) * 2000-12-22 2003-03-28 Usinor Busette equipee d'une reglette pour l'introduction de metal liquide dans une lingotiere de coulee continue des metaux
US7753273B2 (en) * 2002-07-26 2010-07-13 Es&S Automark, Llc Ballot marking system and apparatus utilizing multiple key switch voter interface
DE10240491A1 (de) * 2002-09-03 2004-01-15 Refractory Intellectual Property Gmbh & Co.Kg Feuerfestes keramisches Tauchrohr
KR100946659B1 (ko) * 2002-11-28 2010-03-10 주식회사 포스코 연속주조용 침지노즐
US20060169728A1 (en) * 2003-03-17 2006-08-03 Dong Xu Submerged entry nozzle with dynamic stabilization
JP2005230826A (ja) * 2004-02-17 2005-09-02 Ishikawajima Harima Heavy Ind Co Ltd 溶湯供給ノズル
CN103251994B (zh) * 2013-04-02 2016-03-30 周春华 一种用于摇摆震动条件下的血壶装置
ES2553784B1 (es) * 2014-06-09 2016-09-14 Refractaria, S.A. Distribuidor para colada de acero
CN107470568A (zh) * 2017-07-24 2017-12-15 嘉善优联物流装备有限公司 一种铸件装置中使用的铸模装置
RU2691021C2 (ru) * 2017-11-07 2019-06-07 Публичное акционерное общество "Русполимет" Разливочное устройство для разливки металла из промковша в изложницы
CN107803492A (zh) * 2017-12-05 2018-03-16 重庆庆龙新材料科技有限公司 锶铝合金成型机
CN108904222B (zh) * 2018-07-30 2020-08-07 北京航空航天大学 一种新型适于软体驱动器逆气流法制作的阻流环
CN108840795A (zh) * 2018-08-08 2018-11-20 江南大学 一种由羊毛脂制备羊毛酸和羊毛醇的方法
CN109465436B (zh) * 2018-11-12 2020-08-28 莱芜钢铁集团银山型钢有限公司 一种超薄异型坯中心点浇铸浸入式水口

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021171A (ja) * 1983-07-16 1985-02-02 Nisshin Steel Co Ltd 幅広薄板連続鋳造装置
JP2583513B2 (ja) * 1987-07-03 1997-02-19 新日本製鐵株式会社 溶融金属注湯用ノズル
FR2647698A1 (fr) * 1989-05-31 1990-12-07 Siderurgie Fse Inst Rech Dispositif d'alimentation en metal liquide d'une installation de coulee continue de produits minces et procede pour sa mise en oeuvre
GB9008538D0 (en) * 1990-04-17 1990-06-13 Rolls Royce Plc A launder system for supplying molten metal and a launder nozzle
JPH1011055A (ja) * 1996-06-18 1998-01-16 Kawai Musical Instr Mfg Co Ltd 電子鍵盤楽器

Also Published As

Publication number Publication date
CA2186084C (fr) 2008-01-29
CN1064286C (zh) 2001-04-11
MX9604288A (es) 1997-08-30
RO117242B1 (ro) 2001-12-28
CA2186084A1 (fr) 1997-03-29
BR9603908A (pt) 1998-06-09
UA42764C2 (ru) 2001-11-15
JP3978794B2 (ja) 2007-09-19
AU702389B2 (en) 1999-02-18
TW345508B (en) 1998-11-21
US5733469A (en) 1998-03-31
KR100369257B1 (ko) 2003-03-15
ZA968126B (en) 1997-04-21
DE69602565D1 (de) 1999-07-01
FR2739313A1 (fr) 1997-04-04
DK0765702T3 (da) 1999-12-06
TR199600774A2 (tr) 1997-04-22
EP0765702A1 (fr) 1997-04-02
CZ285931B6 (cs) 1999-11-17
JPH09108794A (ja) 1997-04-28
SK281773B6 (sk) 2001-07-10
FR2739313B1 (fr) 1997-10-31
CN1154885A (zh) 1997-07-23
SK118296A3 (en) 1998-01-14
RU2163179C2 (ru) 2001-02-20
ATE180427T1 (de) 1999-06-15
KR970014880A (ko) 1997-04-28
AU6443596A (en) 1997-04-10
DE69602565T2 (de) 1999-12-16
PL181356B1 (pl) 2001-07-31
GR3030610T3 (en) 1999-10-29
PL316322A1 (en) 1997-04-01
CZ279996A3 (en) 1997-04-16
ES2132857T3 (es) 1999-08-16

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