EP2965838B1 - Distributor for steel casting - Google Patents

Distributor for steel casting Download PDF

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Publication number
EP2965838B1
EP2965838B1 EP15382275.4A EP15382275A EP2965838B1 EP 2965838 B1 EP2965838 B1 EP 2965838B1 EP 15382275 A EP15382275 A EP 15382275A EP 2965838 B1 EP2965838 B1 EP 2965838B1
Authority
EP
European Patent Office
Prior art keywords
molten metal
distributor
chamber
ducts
radial
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.)
Active
Application number
EP15382275.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2965838A1 (en
Inventor
Carlos Omar Suarez Álvarez
José Luis Pena Vazquez
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.)
Refractaria SA
Original Assignee
Refractaria 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 Refractaria SA filed Critical Refractaria SA
Priority to PL15382275T priority Critical patent/PL2965838T3/pl
Publication of EP2965838A1 publication Critical patent/EP2965838A1/en
Application granted granted Critical
Publication of EP2965838B1 publication Critical patent/EP2965838B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
    • B22D35/045—Runner base plates for bottom casting ingots
    • 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
    • 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
    • B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/02—Equipment for conveying molten metal into beds or moulds into beds

Definitions

  • the present invention relates to a distributor for steel casting, for the use thereof in obtaining steel ingots produced via the casting plate mould system, made such that it enables the defects due to the impurities that may affect special steels to be reduced.
  • mould casting consists of casting the molten metal from a ladle, once the metallurgy is completed, over a vertical refractory duct (formed by an initial piece referred to as a pouring basin and a succession of down runners), which conducts the molten metal to a refractory distributor (referred to as a brick) that is situated on the casting plate on which the ingots are arranged.
  • a refractory distributor referred to as a brick
  • a number of tubes come out of this distributor, and they conduct the molten metal until it is situated below each one of the ingots.
  • the last tube final or stop tube
  • a distributor comprising a chamber equipped with a central inlet opening at the base thereof, to which a vertical tube for supplying molten metal is connected, and a series of radial outlet ducts on the side wall thereof, to which other respective tubes that conduct molten metal are connected.
  • the molten steel is freed from the ladle by the closure through which a stream falls at a speed defined by the filling level of the molten metal inside the ladle.
  • the molten metal in the vertical duct accelerating due to the effect of gravity until it hits the bottom of the distributor at a speed of approximately 10 m/s (in the most common conditions).
  • the impact of the steel with the bottom of the distributor causes energy to be released, which translates into the erosion of the inner surfaces of the refractory.
  • the quality of the steel is conditioned by the impurities included in the process for obtaining ingots during the casting process.
  • the object of the present invention is to provide a refractory distributor made such that it prevents the slag already present in the ladle from reaching the mould, furthermore reducing the erosion and displacements of the refractory ducts to a minimum and limiting the oxidisation phenomenon that is produced during conducting itself and when entering the mould.
  • the distributor of the invention is of the type described above, made up of a chamber equipped with a central intake opening at the base thereof, to which a vertical tube for supplying molten metal is connected, whilst on the side wall it is provided with a series of radial outlet ducts, to which other molten metal duct tubes are connected.
  • the chamber of the distributor has a greater diameter than the vertical duct for supplying molten metal and is situated above the radial outlet ducts, to which it is connected through vertical passages that originate from the bottom of the chamber and each one opens onto each radial duct.
  • the chamber of the distributor has a central hollow at the bottom that is closed at the sides and below and forms a vessel, which is open at the upper base thereof, with a diameter approximately equal to that of the vertical tube for supplying molten metal.
  • the weak points of the traditional distributors at the intersection between the radial outlet tubes and the chamber of the distributor are removed.
  • the distributor of the invention there are no edges with a reduced thickness constituting weak points that are easily eroded by the flow of molten metal.
  • the chamber has a horizontal cross section that is at least equal to and preferably greater than the sum of the transversal cross sections of the radial ducts.
  • the molten metal that falls through the vertical tube loses practically all its speed when it reaches the vessel, without exiting the distributor. This causes the hydraulic jump to occur inside the distributor itself. Due to the inner make-up of the distributor of the invention, with the vessel, the chamber situated above the radial outlet ducts and the connection labyrinth between the radial outlet tubes and the chamber, the distributor even acts as a filter from the moment of the initial impact.
  • the reduction in speed caused by preventing it to continue and the increasing the cross section of the chamber means that the inclusions can return upwards, due to being less dense than the cast steel, instead of continuing towards the mould with the steel.
  • Figures 1 and 2 show a traditional mould casting installation, in which the molten metal is poured from a ladle (not shown) over a vertical refractory duct (1), which is formed by an initial pouring basin (2) and a succession of down runners (3).
  • This vertical duct (1) conducts the molten metal to a refractory distributor (4), which forms a chamber (5) from the wall of which a series of radial ducts (6) originate, to which tubes (7) are connected that conduct the molten metal until it is situated below the moulds, where they may be finished in an inlet bend (8) at the bottom of the mould.
  • the molten metal poured into the pouring basin (2) reaches a relatively high speed through the vertical tube (1), thus producing an impact on the distributor (4) that causes a certain amount of erosion on the same.
  • This effect is increased by the inner geometry of the distributor (4) due to the fact that the opening of the radial ducts (6) in the chamber (5) delimits edges (9), figure 3 , between consecutive ducts (6), which constitute easily eroded weak points, creating materials that are carried by the molten metal and that are the cause of significant inclusions in the resulting steel.
  • This distributor (10) comprises a chamber (11) with a central inlet mouth (12) to which the vertical tube (13) for supplying molten metal is connected. As may be seen in figures 7 and 8 , the chamber (11) has a larger diameter than the vertical duct (13) for supplying molten metal.
  • the distributor (10) is provided with a central hollow (14) at the bottom thereof, which is closed at the sides and below and forms a vessel (15), which is open at the upper base thereof, the diameter of which is approximately equal to the vertical tube (13) and the central inlet mouth (12).
  • Radial outlet ducts (16) to which other respective tubes (17) for conducting the molten metal towards the mould are connected, originate from around the vessel (15).
  • the radial ducts (16) are linked to the chamber (11) through the vertical passages (18) that originate from the bottom of the chamber (11) and open up below onto the radial ducts (16).
  • the chamber (11) is situated above the radial ducts (16), which it is linked to through the vertical passages (18).
  • the chamber (11) has a cross section equal to and preferably greater than the sum of the transversal cross sections of the set of radial ducts (16).
  • the molten metal that reaches the distributor through the vertical tube (13) falls into the vessel (14), from where it overflows and passes to the radial ducts (16) through the vertical passages (18), thus considerably reducing the speed of the molten metal.
  • This reduction in speed caused, along with the larger cross section of the chamber (11), means that the inclusions can return upwards, due to being less dense than the cast steel, instead of continuing towards the mould with the current of steel.
  • the forward-movement speed of the molten metal, towards the mould depends on the flow and no the falling speed, thus achieving a reduction in the forward-movement speed of up to approximately three metres per second.
  • This reduction in speed constitutes a reduction in friction between the current of molten metal and the surface of the refractory ducts, thus significantly reducing the risk of refractory material becoming detached as a result of the mechanical action of the flow.
  • Another effect of reducing the speed of the molten metal in the distributor is that the speed with which the air contained in the tubes (17) is freed towards the mould is substantially reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Continuous Casting (AREA)
EP15382275.4A 2014-06-09 2015-05-25 Distributor for steel casting Active EP2965838B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15382275T PL2965838T3 (pl) 2014-06-09 2015-05-25 Urządzenie rozdzielcze do odlewania stali

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201430886A ES2553784B1 (es) 2014-06-09 2014-06-09 Distribuidor para colada de acero

Publications (2)

Publication Number Publication Date
EP2965838A1 EP2965838A1 (en) 2016-01-13
EP2965838B1 true EP2965838B1 (en) 2016-12-21

Family

ID=53365951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15382275.4A Active EP2965838B1 (en) 2014-06-09 2015-05-25 Distributor for steel casting

Country Status (3)

Country Link
EP (1) EP2965838B1 (pl)
ES (1) ES2553784B1 (pl)
PL (1) PL2965838T3 (pl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3051130B1 (fr) * 2016-05-11 2019-08-02 Safran Systeme d'alimentation pour alimenter un moule en metal fondu, installation et procede de fabrication la mettant en oeuvre
DE102018115066A1 (de) 2018-06-22 2019-12-24 Steuler Korrosionsschutz Holding GmbH Umlenkvorrichtung zum Umlenken eines Schmelzstromes in einem Untergussgespann beim Blockgießen, Untergussgespann, Presswerkzeug und Herstellungsverfahren

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767082A1 (fr) * 1997-08-06 1999-02-12 Vesuvius France Sa Busette de coulee pour le transfert d'un metal liquide d'un repartiteur dans une lingotiere

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1533067A (en) * 1924-03-26 1925-04-07 Mcnelly Harry Sprue plate for ingot molds
US1757549A (en) * 1928-09-17 1930-05-06 Albert W Smith Method of and apparatus for casting metal
GB825293A (en) * 1956-09-07 1959-12-16 Wellman Smith Owen Eng Co Ltd Improvements in or relating to apparatus for the casting of metal ingots
GB1499318A (en) * 1975-10-31 1978-02-01 British Steel Corp Teeming assembly
FR2739313B1 (fr) * 1995-09-28 1997-10-31 Usinor Sacilor Busette pour l'introduction d'un metal liquide dans une lingotiere de coulee continue des metaux
US20130025815A1 (en) * 2011-07-29 2013-01-31 Nibouar F Andrew Down sprue core for use in casting railcar coupler knuckles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767082A1 (fr) * 1997-08-06 1999-02-12 Vesuvius France Sa Busette de coulee pour le transfert d'un metal liquide d'un repartiteur dans une lingotiere

Also Published As

Publication number Publication date
ES2553784B1 (es) 2016-09-14
EP2965838A1 (en) 2016-01-13
ES2553784A1 (es) 2015-12-11
PL2965838T3 (pl) 2017-07-31

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