EP0183118B1 - Installation d'alimentation en métal liquide avec contrôle de température du métal liquide pour la coulée continue d'un tube - Google Patents

Installation d'alimentation en métal liquide avec contrôle de température du métal liquide pour la coulée continue d'un tube Download PDF

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Publication number
EP0183118B1
EP0183118B1 EP85114315A EP85114315A EP0183118B1 EP 0183118 B1 EP0183118 B1 EP 0183118B1 EP 85114315 A EP85114315 A EP 85114315A EP 85114315 A EP85114315 A EP 85114315A EP 0183118 B1 EP0183118 B1 EP 0183118B1
Authority
EP
European Patent Office
Prior art keywords
die
core
installation according
cavity
iron
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
Application number
EP85114315A
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German (de)
English (en)
French (fr)
Other versions
EP0183118A1 (fr
Inventor
Michel Pierrel
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.)
Pont a Mousson SA
Original Assignee
Pont a Mousson 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 Pont a Mousson SA filed Critical Pont a Mousson SA
Publication of EP0183118A1 publication Critical patent/EP0183118A1/fr
Application granted granted Critical
Publication of EP0183118B1 publication Critical patent/EP0183118B1/fr
Expired legal-status Critical Current

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    • 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
    • B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes

Definitions

  • the present invention relates to the continuous casting of ferrous alloy tubes and more particularly of cast iron tubes of small thickness compared to the diameter.
  • the present invention relates to the continuous vertical casting of a cast iron tube from a tubular die and from a heated core coaxial with the tubular die, providing with the latter an annular section for the casting of the pipe.
  • the Applicant also knows a continuous casting installation according to the preamble of claim 1, but no device for controlling and regulating the temperature of the liquid iron is provided.
  • the present invention poses the problem of controlling and ensuring the regulation of the temperature of the liquid iron itself, that is to say of acting on the liquid phase rather than on the solid phase in an installation.
  • vertical ascending supply, at source, by a siphon block system in order also to avoid the risks of obstruction by premature solidification of the cast iron in said narrow annular space.
  • the present invention relates to an installation for supplying liquid cast iron for the continuous casting of a pipe, with a view to controlling and regulating the temperature of the cast iron, this installation, of the casting type.
  • upward vertical continuous with source supply of an annular space between a cooled tubular die and a heated coaxial core being characterized in that it comprises an electric furnace for maintaining the melting temperature containing liquid cast iron enveloping a device for supply of liquid iron to the annular space between die and core of the die-core molding assembly, said device of liquid iron supply which comprises the die-core molding assembly as well as a means of control and regulation of the temperature of the core, being produced in a set of graphite blocks carried by a refractory upper cover of the electric furnace, said cover being removable so as to to lift the supply device out of the temperature-maintaining cast iron bath contained in the oven, and said cover being sealable at the top of the oven, so as to immerse the supply device in the cast iron bath temperature maintenance.
  • the means for controlling and regulating the temperature of the core of the die-core molding assembly is constituted by a so-called expansion vessel communicating with the cavity of the hollow core of the die-core assembly in view. feeding said core cavity in liquid iron at a variable level.
  • the installation of the invention essentially comprises an electric oven 1 or liquid iron container or heating crucible-tank, and a refractory upper cover 2 capable of sealingly closing the upper part of the electric oven 1.
  • the electric oven 1 containing liquid iron F therefore serves as a container for the bath or in the envelope of liquid iron for maintaining the temperature of the liquid iron supply device proper which, according to the invention, is carried by the cover 2 and is constituted by a set 3 of graphite blocks.
  • the electric oven 1 Placed on an openwork platform 4 in order to have access to the lower part or to the bottom of the electric oven 1, with a view to emptying this oven through a closable lower orifice not shown, the electric oven 1 comprises at inside a thick sheet metal casing 5 a thick refractory lining 6, for example of the silico-aluminous type, providing a capacity 7 for receiving liquid iron.
  • the electric oven 1 is provided with electric heating means constituted for example by an inductor 8 enveloping the vertical wall of its refractory lining 6.
  • the electric oven 1 also has at its upper part a chute 9 for outward flow of a possible overflow of liquid iron.
  • the electric oven 1 is closed at its upper part by the upper cover 2 also comprising an outer sheet metal casing and a thick refractory lining, of the silico-aluminous type for example.
  • the upper cover 2 is provided with a fixing flange or ears 10 cooperating with fixing bolts 11, the lower end of which is secured to the perforated platform 4, so that that, by tightening the bolts 11, the cover 2 is applied in leaktight manner to the upper part of the oven 1, by means of a seal, not shown, which is crushed between the oven 1 and the cover 2, but without covering an overflow hole formed by a chute 9.
  • the cover 2 serves as a suspended support for a set of graphite blocks 3 constituting a molding assembly 13-14 with cooled die 13 and heated hollow core 14 coaxial with the die, around an axis XX vertical, also constituting a device 15 for supplying liquid iron to the molding assembly 13-14, around a vertical axis YY and finally constituting a means 16 for regulating and controlling the temperature of the hollow core 14, said means constituting a vase 16 called "expansion".
  • the set 3 of graphite blocks with the capacity 7 of the furnace 1 provides a liquid iron housing space in which the part of the set 3 located below the cover 2 is immersed.
  • the molding assembly comprises a tubular die 13 of axis XX, made of graphite, housed in a cavity provided on the assembly 3 of graphite blocks at the bottom of which it rests by an outer flange 17 of circular shape .
  • the die 13, passing through the refractory lining of the cover 2 is enveloped by a cooling sleeve 18 over a part of its height corresponding approximately to the thickness of the refractory lining of the cover 2, the hollow sleeve 18 being traversed by a fluid such as water or a liquid metal with a low melting point, such as lead or tin.
  • the internal wall of the die 13 is machined with precision in cylindrical form. However, at the lower part, the die 13 is flared in a frustoconical manner at 21 to facilitate the entry of liquid metal, that is to say liquid cast iron. At its upper part, the die 13 is flared, above the cover 2, along a frustoconical surface 22 of clearance out of contact with the cast iron tube in formation.
  • the hollow core 14 of external shape carefully machined in cylindrical form is made of graphite like the die 13 with respect to which it is well centered coaxially (axis XX) and rests on the graphite assembly 3 by a lower flange 23 of support located substantially below the die 13 so as to provide with the lower flaring 21 of the liquid metal inlet an annular space which is largely dimensioned, substantially greater than the annular space comprised between the die 13 and the core 14 to form the barrel of a cast iron pipe T.
  • the hollow core 14 forms a circular lower chamber 24 for communication with the graphite block which it supports in assembly 3.
  • the hollow core 14 has a cylindrical cavity or interior chamber 25 communicating with the chamber 24 and communicating at its upper part with the open air by a cylindrical-conical orifice 26 passing through the upper wall of the graphite core 14 and closed by a flap graphite ball 27 resting by gravity on the orifice 26 which serves as its seat.
  • This source supply device 15 has the form of a graphite siphon block forming part of the assembly 3 externally covered with a thick refractory lining 6.
  • the device 15 comprises a vertical chimney 28 with an upper funnel, axis YY surmounting the cover 2 by a height H substantially greater than the height h of the die 13 exceeding the cover 2.
  • the vertical chimney 28 extends to the bottom wall of the assembly 3 of graphite block so as to open out outside the graphite block above the capacity 7 of the oven 2. But at its lower part, the chimney 28 is closed for example by a transverse drawer 29, or by any other equivalent means, the opening of which controls emptying the chimney 28 into the capacity 7.
  • the chimney 28 is extended following a right angle bend by a horizontal conduit 30 which opens below the flare taper 21 inlet of liquid iron into the annular space of the molding assembly 13-14, at the lower part thereof so as to supply it at source.
  • the graphite block containing the chimney 28 is enveloped by a tubular electric heating resistor of a height corresponding to almost the entire height of the chimney 28, that is to say to the chimney part 28 included above the oven. (height H + thickness of cover 2).
  • the expansion tank 16 comprises a cavity or a cylindrical chamber 31 almost closed with the exception of a lower opening 32 opening into a lower circular communication chamber 33, and with the exception of an upper orifice 34 connected by a conduit 35 under the control of a valve 36 to a source of pressurized gas such as air or nitrogen or argon.
  • the vase 16 is closed at its upper part by a graphite cover 16 a which is screwed.
  • the lower communication chamber 33 communicates on the one hand with the lower communication chamber 24 of the molding assembly 13-14 by a horizontal conduit 37 hollowed out in the graphite assembly 3, on the other hand with the capacity 7 of the electric oven 1 by a vertical extension of the lower opening 32, this extension which opens onto the lower face of the assembly 3 of graphite blocks, being closed for example by a transverse drawer 38 whose opening allows the emptying of the cavity 31 in the capacity 7 of the oven 1.
  • the expansion vessel 16 is the means of controlling and regulating the temperature of the core 14.
  • the capacity 7 of the electric oven 1 is initially empty or else contains a remainder of liquid iron F or foot of bath.
  • the electric oven 1 being closed in a leaktight manner by its cover 2 with tightened bolts 11, and the set of graphite blocks 3 thus being sus hanged above the capacity 7 of the furnace, liquid cast iron is introduced through the filling hole 12 of axis WM (Fig. 3) to a level slightly lower than the height of the overflow chute 9 If this level is exceeded, the excess liquid iron flows outwards through the chute 9.
  • the inductor 8 is energized. The oven 1 is therefore heated.
  • liquid iron F is introduced into the cavity 31 of the vessel 16.
  • the level of the liquid iron rises at the same time and to the same height in the cavities 25 and 31.
  • the level of liquid iron in the cavity 25 may vary between a lower level in solid line located at the level of the flared entry 21 of the die 13 (FIG. 1), a little below the lower part of the cooling sleeve 18, and an upper level, in line interrupted, located just below the ball valve 27.
  • the vertical chimney 28 is heated over its entire height located above the capacity 7 of the oven, by the electric heating resistor 28a energized.
  • a cooling fluid for example cold water, is brought into circulation by the conduit 19, the sleeve 18 and the conduit 20.
  • the core is heated 14 by bringing pressurized fluid into the conduit 35 so as to cause liquid iron to rise from the cavity 31 of the expansion vessel 16 towards the cavity 25 of the core 14 up to the upper part thereof.
  • Liquid cast iron is poured through the vertical chimney 28. The latter descends to the horizontal duct 30 which it fills, then rises in the flared inlet 21 of the die 13 and continues its rise under a pressure corresponding to the height of the chimney 28, in the annular space between the die 13 and the core 14.
  • the cast iron which is in contact with the core 14 remains liquid while the cast iron which is in contact with the die 13 cooled by the mancon 18, is cooled and tends to solidify along a solidification front delimiting a solid phase which progresses in thickness from the bottom up, according to the solidification front described in patent FR 24 15 501, but in opposite direction since the casting is rising instead of being falling in this patent.
  • the solidification of the cast iron is complete at the upper level of the core 14 and at the base of the clearance 22 which allows the pipe T to freely exit (Fig. 1).
  • External heating of the cast iron supplying the die 13 with a core 14 it is provided by the liquid cast iron F contained in the capacity 7 and heated, kept liquid by the inductor 8.
  • the temperature of this cast iron F can be increased by increasing (if possible) the heating power of the inductor 8. It is also possible to renew the liquid iron contained in the capacity 7 if its temperature is considered to be insufficiently high. It is therefore possible to introduce liquid iron at an even higher temperature through the filling hole 12 (FIG. 3) so as to replace at least part of the insufficiently hot iron which flows through the overflow chute 9.
  • Ansi all the blocks 3 of graphite is maintained at the right temperature by a kind of water bath constituted by the cast iron contained in the capacity 7 of the furnace 1.
  • This control and this regulation are carried out so as to continuously obtain a solid tube T made of cast iron at the outlet of the annular space between die 13 and core 14, that is to say at the level of the upper end edge of the core 14.
  • the level of the cast iron F is then lowered in the cavity 25 of the core 14 by reducing the pressure of the gaseous fluid in the cavity 31 of the expansion vessel 16, and, simultaneously, the cooling of the sleeve 18 is made more energetic by accelerating the refrigerant fluid flow which flows through the conduits 19 and 20 and, if possible, decreasing its temperature.
  • thermocouples not shown The temperature control of the walls of the die 13 and of the core 14 is carried out using thermocouples not shown and suitably placed in particular on the core 14.
  • the annular space between the die 13 and the core 14 benefiting from a control and a temperature regulation, it is possible to pour a tube T of very thin cast iron since it prevents the cast iron from freezing prematurely or on the contrary that it remains liquid up to the upper part of the annular space between the die 13 and the core 14.
  • the tube T has an outside diameter of 118 mm and a thickness of 3 mm.
  • the application of the invention is not limited to such numerical values, but on the contrary extends to greater values, both in diameters and in thicknesses, it is for small diameters and small thicknesses, and low thickness / diameter ratios, for example of the order of 3/100, that it is the most advantageous.
  • the set 3 of the graphite blocks is drained of the liquid iron F which it contains by detaching the cover 2 from the oven 1, by lifting it well above the oven 1 (Fig. 2) and by opening the drawers 29 and 38 as soon as they are released from the oven 1.
  • the liquid iron then falls into the capacity 7 of the furnace 1.
  • the assembly 3 of the graphite blocks can advantageously be produced in a certain number of cylindrical parts capable of being attached and screwed onto the parallelepipedic block 3 (FIG. 3).

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Continuous Casting (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • General Induction Heating (AREA)
  • Control Of Temperature (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Details (AREA)
  • Secondary Cells (AREA)
  • Ceramic Products (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Saccharide Compounds (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Body Structure For Vehicles (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
EP85114315A 1984-11-26 1985-11-11 Installation d'alimentation en métal liquide avec contrôle de température du métal liquide pour la coulée continue d'un tube Expired EP0183118B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8418084 1984-11-26
FR8418084A FR2573683B1 (fr) 1984-11-26 1984-11-26 Installation d'alimentation en metal liquide avec controle de temperature du metal liquide pour la coulee continue d'un tuyau en fonte

Publications (2)

Publication Number Publication Date
EP0183118A1 EP0183118A1 (fr) 1986-06-04
EP0183118B1 true EP0183118B1 (fr) 1988-06-01

Family

ID=9310003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114315A Expired EP0183118B1 (fr) 1984-11-26 1985-11-11 Installation d'alimentation en métal liquide avec contrôle de température du métal liquide pour la coulée continue d'un tube

Country Status (24)

Country Link
US (1) US4632174A (pt)
EP (1) EP0183118B1 (pt)
JP (1) JPS6224840A (pt)
KR (1) KR900001324B1 (pt)
AT (1) ATE34681T1 (pt)
AU (1) AU566124B2 (pt)
BR (1) BR8505908A (pt)
CA (1) CA1262612A (pt)
CS (1) CS272209B2 (pt)
DD (1) DD238202A5 (pt)
DE (1) DE3562993D1 (pt)
EG (1) EG17104A (pt)
ES (1) ES8608965A1 (pt)
FI (1) FI78407C (pt)
FR (1) FR2573683B1 (pt)
GB (1) GB2167695B (pt)
IN (1) IN165785B (pt)
MX (1) MX167314B (pt)
MY (1) MY103295A (pt)
PL (1) PL147383B1 (pt)
RO (1) RO93628B (pt)
SU (1) SU1435143A3 (pt)
YU (1) YU44530B (pt)
ZA (1) ZA858734B (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806032A (en) * 1987-05-11 1989-02-21 Hewlett-Packard Company Conical vent containing capillary bore
FR2705259B1 (fr) * 1993-05-19 1995-07-07 Pont A Mousson Dispositif d'alimentation en métal en fusion, notamment en fonte, d'une machine de coulée, et installation de coulée intégrant ce dispositif d'alimentation.
FR2751249B1 (fr) * 1996-07-17 1998-09-04 Pont A Mousson Dispositif de positionnement d'un bloc-filiere d'une table de coulee d'une machine de coulee continue verticale ascendante
CN100479948C (zh) * 2007-10-24 2009-04-22 西安理工大学 低塑性金属空心型材的连铸成形设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415501A1 (fr) * 1978-01-27 1979-08-24 Pont A Mousson Procede et installation pour la coulee continue de produits tubulaires
JPS5785653A (en) * 1980-11-19 1982-05-28 Kawasaki Steel Corp Continuous casting method for hollow blank material for clad pipe
FR2508828A1 (fr) * 1981-07-06 1983-01-07 Pont A Mousson Dispositif de support et de centrage d'un noyau dans une filiere de coulee continue d'un tube
DE3207777C2 (de) * 1982-03-04 1984-09-06 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Verfahren und Vorrichtung zum Rohrstranggießen von Metallen, inbes. Nickel- und Kobaltlegierungen
FR2523006A1 (fr) * 1982-03-12 1983-09-16 Pont A Mousson Filiere tubulaire pour la coulee continue d'un tube, a paroi mince, en fonte

Also Published As

Publication number Publication date
GB2167695A (en) 1986-06-04
FR2573683A1 (fr) 1986-05-30
EG17104A (fr) 1993-10-30
PL256438A1 (en) 1986-09-23
KR900001324B1 (ko) 1990-03-08
AU4999685A (en) 1986-06-26
ZA858734B (en) 1986-07-30
EP0183118A1 (fr) 1986-06-04
CS853285A2 (en) 1990-03-14
GB8528061D0 (en) 1985-12-18
JPS6224840A (ja) 1987-02-02
PL147383B1 (en) 1989-05-31
DD238202A5 (de) 1986-08-13
DE3562993D1 (en) 1988-07-07
FI854626A0 (fi) 1985-11-22
CA1262612A (fr) 1989-11-07
AU566124B2 (en) 1987-10-08
FI78407B (fi) 1989-04-28
CS272209B2 (en) 1991-01-15
FI78407C (fi) 1989-08-10
MY103295A (en) 1993-05-29
IN165785B (pt) 1990-01-13
YU182985A (en) 1988-06-30
MX167314B (es) 1993-03-16
BR8505908A (pt) 1986-08-19
RO93628A (ro) 1988-02-29
SU1435143A3 (ru) 1988-10-30
FI854626A (fi) 1986-05-27
ES8608965A1 (es) 1986-07-16
ES549293A0 (es) 1986-07-16
JPH0150503B2 (pt) 1989-10-30
YU44530B (en) 1990-08-31
US4632174A (en) 1986-12-30
RO93628B (ro) 1988-03-01
KR870004751A (ko) 1987-06-01
FR2573683B1 (fr) 1987-01-02
GB2167695B (en) 1988-08-10
ATE34681T1 (de) 1988-06-15

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