EP3283245B1 - Lingotière tubulaire soutenue pour des installations de production de billettes et de blooms - Google Patents

Lingotière tubulaire soutenue pour des installations de production de billettes et de blooms Download PDF

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Publication number
EP3283245B1
EP3283245B1 EP16718629.5A EP16718629A EP3283245B1 EP 3283245 B1 EP3283245 B1 EP 3283245B1 EP 16718629 A EP16718629 A EP 16718629A EP 3283245 B1 EP3283245 B1 EP 3283245B1
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EP
European Patent Office
Prior art keywords
water
tube
mould
mold
flange
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EP16718629.5A
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German (de)
English (en)
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EP3283245A1 (fr
Inventor
Franz Wimmer
Johann Poeppl
Heinrich Thoene
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/059—Mould materials or platings
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock

Definitions

  • the present invention relates to a tube mold for continuously casting metal strands in billet or billet format, which has an internal, exchangeable mold tube with a holding device, surrounding the mold tube Wasserleitmantel and a head flange at the pouring end and a gravitational force at the pouring end.
  • Such molds comprise an inner mold tube, which forms a mold which is open on both sides, through which the cast metal passes during the casting process and which is surrounded by a water-conducting jacket.
  • the mold tube is usually made of a piece of metal - usually made of a copper alloy - with a constant wall thickness. It accordingly has an inner side facing the cast metal strand and an outer side facing the Wasserleitmantel and a Eing man workedes and a Abg cord workedes The End.
  • the pre-block material forms with its outside the cross-sectional shape of the pre-block material and can either be formed straight along the casting direction or have a slight curvature.
  • the so-called water gap is formed, which serves to guide a cooling medium - usually water - along the outer surface of the mold tube and so dissipate sufficient casting heat from the molten metal in the interior of the mold tube, to allow the formation of a strand shell in the molten metal at a given casting speed.
  • the heat removal to the cooling medium depends on the extent of the contact surface, the temperature difference between the Kokillenrohrober Assembly and the cooling medium and the heat transfer coefficient, which in turn is influenced by the flow geometry and the flow rate of the cooling medium. Since for practical reasons, the temperature of the cooling medium can not be chosen arbitrarily low - the cooling water at steel-producing plants usually has a temperature of up to 40 ° C - can be ensured sufficient cooling effect only by a correspondingly high flow rate of the cooling medium.
  • the gap formed between the water jacket and the outer surface of the mold tube is usually only a few millimeters deep, so that in conjunction with a pressurization of the cooling medium of a few bar, the flow velocity of the cooling medium along the Kokillenrohres - and, consequently, the heat transfer coefficient and thus the Cooling capacity of the mold - set to a corresponding value.
  • the Wasserleitmantel can only be embedded as a flow-leading part for the cooling liquid in a water tank
  • the water box has a larger inlet and outlet reservoir with the corresponding connections for the cooling medium and also forms the mechanical frame in which the mold tube is attached.
  • the water tank has corresponding flanges and seals, which allow that the mold tube can be positively inserted into the water box and that allow a constant circulation of the cooling liquid along the Kokillenrohres and prevent the escape of coolant from the tube mold.
  • Such molds are known from the specialist literature: see, for example, Chap. 15.6.6.2 with Fig. 15.62 and Chap. 15.6.6.3 with Fig. 15.63 and Chap. 17.1.1.3 with Fig. 17.3 in " The Making, Shaping and Treating of Steel ", 11th edition 2003, The AISE Steel Foundation ,
  • a generic continuous casting mold is from the DE 32 07 149 C1 known, including, among other things, a mold tube, an upper and a lower flange plate, a Wasserleitmantel and a water tank.
  • the mold tube, the upper and the lower flange plate and the Wasserleitmantel be connected to a unit, wherein the Wasserleitmantel via fasteners attached to the upper and lower flange plate and is centered relative to the inner Kokillenrohr (see FIG. 1 ).
  • the pre-assembly of this unit can be done in a workshop, then to be mounted as a whole in the water tank on the system and so the assembly time can be minimized at the casting platform itself.
  • a mold of the type described does not have separate means for centering the water jacket relative to the mold tube, so that accurate alignment, which is essential to achieve a uniform cooling effect, is correspondingly time consuming.
  • the water box has at its lower end a centering guide for receiving the lower flange plate, so that the unit is centered as a whole in the water tank. Further, the water box is sealed by the lower flange plate in its lower end region and sealed so against cooling water outlet.
  • any electromagnetic stirring coils must be mounted in its water-flowed interior (see FIG. 2 ), which means an increased design effort regarding the sealing of passages for the electrical connections and a corresponding amount of work in an exchange of the mold tube.
  • the DE 38 19 492 A1 also describes a continuous casting mold for casting billet molds, which has an inner mold tube which is connected via a base and a cover plate to a water box and internally has a Wasserleitmantel which forms a flow gap for the cooling medium to the outer surface of the Kokillenrohres.
  • a circular-cylindrical housing made of stainless steel is installed in the water-flowed interior of the water box, which includes at least two separately controllable, superimposed stirring means for generating a rotating electromagnetic force field. The separate control of the two agitators allows the application of both the free-jet casting and the dip tube casting process without retooling the mold. Since the mold tube has no additional lateral supports (see also FIG. 1 and FIG.
  • the Wasserleitmantel has the appropriate connections for the inlet and outlet of the coolant and the mold tube is connected, for example, at the inflow end by a head flange and the pouring end by a foot flange with the Wasserleitmantel.
  • tube molds are often equipped with an electromagnetic stirring device in the form of electric coils with iron core.
  • an electromagnetic stirring device in the form of electric coils with iron core.
  • the coils In order to achieve a sufficiently large induction effect in the molten metal and to minimize the induced eddy currents in electrically conductive components of the mold, which lead to an undesirable heating and thus represent a power loss in the material of the mold itself, the coils must be brought as close to the mold tube , which is a design difficulty because of the intervening cooling device.
  • these unwanted eddy currents can be minimized by the mold tube has a wall thickness as small as possible and by the water box or the Wasserleitmantel of possible non-magnetic material, such as. austenitic stainless steel.
  • Such a stirring device for continuous casting molds in the pre-block format wherein the stirring device 8, 9 according to claim 1 and Fig. 4 in a region below the water inflow and outflow passages 7a and 7b located at the upper mold end.
  • the mold comprises a casting plate forming the copper plate 2, an outer plate 3 connected to the copper plate, and a frame 4 supporting the outer plate and the copper plate and to which the stirring device is attached via a flange 15.
  • the cooling water is passed through various chambers and passages of the outer shield and the frame to the outer surface of the copper plate, which causes a relatively complex structure in the production and maintenance.
  • the stirring device is part of the mold itself and thus has to be made separately for each individual mold.
  • WO 0041830 A1 is a tube mold for billet formats known which have an electromagnetic stirring device and in which, instead of a water jacket surrounding the mold tube, cooling channels are placed inside the wall of the mold tube itself, see Z.25 - 28 on p.11 and FIG. 2 and FIG. 5a , Since in this construction, no water tank or Wasserleitmantel is present, which provides the necessary mechanical stability of the Kokillenrohrs, and there further the water channels, which have a diameter of 8 - 16mm according to claim 11 and a minimum distance of 5 to 20mm from the inside of the mold tube are arranged (see 30 in FIG. 5a ), the mold wall has a significantly increased wall thickness and thus a higher material requirement.
  • the mold tube which is usually made of copper for the most part and therefore has only a relatively low mechanical strength, has no mechanical support on the flat surfaces of the outside, an increased wall thickness is necessary to excessive deformation due to the pressurization the cooling liquid and to avoid due to the thermal stresses during the casting process. Therefore, this variant is complicated to manufacture or limited to smaller cross-sectional formats, if the wall thickness should not exceed certain economic limits.
  • a tube mold for round and polygonal Vorblockformate with reduced wall thickness of the copper tube is known in which the water box in which the copper pipe is mounted, is formed directly as Wasserleitmantel and provides both the water supply along the outside of the copper pipe as well as the mechanical support skeleton for the Forms mold tube and this completely encloses.
  • the Wasserleitmantel consists according to the invention disclosed therein in molds of rectangular cross section of four support plates bolted together, which form a narrow gap to the copper pipe and are connected thereto via webs and ribs.
  • the water flow via cooling channels which are milled into the outside of the copper pipe or in the inside of the support plates (see claim 2, 3 and FIG.
  • a Kokillenkonstrutation is known which according to claim 1 or FIG. 4 a mold tube ("mold" 202) and a cooling jacket 204 for forming a narrow flow gap 210 for a coolant along the outer surface of the mold tube in an outer housing assembly 208, wherein the cooling jacket via a tubular intermediate structure 206 and special coupling means 216 in a non-rigid Art with the housing assembly coupled and wherein the cooling jacket has radially acting adjusting means 212 for adjusting the flow gap to the mold tube.
  • the wall thickness must be chosen correspondingly large for larger cross-sections, but on the other hand, the temperature load on the inside of the mold tube increases and the copper alloys used for the mold tube are limited in this regard, this configuration of a continuous casting mold on smaller cross-sections, primarily billet formats , limited.
  • a tube mold as main components comprises an inner mold tube with a holding device, an outer water jacket, a pour-in head flange and a pour-out base flange.
  • the mold tube and the Wasserleitmantel are shaped so that a uniform, annular water gap is formed between them in the assembled state of the tubular mold, is passed through the cooling liquid for the removal of heat from the cast metal strand. Since the local heat dissipation by the cooling liquid is significantly influenced by the geometry of this gap and should be as uniform along the circumference of the mold tube, according to the invention in a cross section through the tube mold perpendicular to the casting direction, the inside of the water jacket substantially concentric with the outside of the mold tube.
  • the Wasserleitmantel is formed with a sufficient wall thickness, so that it forms a uniform water gap for the circulation of cooling fluid with the outside of the mold tube and at the same time mechanical support for the inner mold tube is used: this is given a design that allows to position electromagnetic stirring coils as close to the molten metal and to achieve a corresponding efficiency.
  • the Wasserleitmantel according to the invention consists of non-magnetic material, which minimizes unwanted, caused by the stirring coils eddy currents in the mold material itself.
  • the material of the water jacket is preferably austenitic stainless steel, such as chromium-nickel steel of the type 1.4301.
  • the mold tube has near its pouring end on a holding device which serves as a mechanical stop when introduced into the Wasserleitmantel, wherein the Kokillenrohr penetrates at the same time with its pouring end mounted on the pouring end of the Wasserleitmantels foot flange.
  • the holding device may be embodied, for example, as a retaining ring which is fastened in a groove of the mold tube and comes to rest on a corresponding step-shaped cutout along the inside at the inflow-side end of the water-conducting jacket.
  • the holding device may be embodied, for example, as a retaining ring which is fastened in a groove of the mold tube and comes to rest on a corresponding step-shaped cutout along the inside at the inflow-side end of the water-conducting jacket.
  • the top flange and the foot flange are each firmly connected to the Wasserleitmantel, which can be done for example by means of suitable screw and the connection between Wasserleitmantel and constitutionalflansch must not be solved in a possible exchange of the mold tube.
  • the mold tube is thus connected via the head flange, the base flange and the holding device with the Wasserleitmantel.
  • the thus configured connection between die tube and Wasserleitmantel also has targeted mechanical tolerances and is therefore flexible, which on the one hand, the centering of the Kokillenrohres allowed in Wasserleitmantel and on the other hand allowed the thermal expansion of the mold tube in the casting direction. This is of importance because the mold tube is heated much stronger than the Wasserleitmantel during the casting operation and therefore has a greater thermal expansion than this, which would lead to unwanted mechanical stresses and deformations of the mold tube in a rigid connection.
  • the mold tube When introducing the mold tube into the water jacket, it must be ensured that the mold tube is symmetrically positioned in the water jacket, so that a uniform water gap to the inside of the water jacket occurs in a cross section through the tube mold perpendicular to the casting direction: this can be achieved, for example, by additional holes in the water jacket with suitable measuring means After checking the correct centering, the holes must again be closed with suitable means, such as blanking screws or blind plugs, to seal the coolant circuit.
  • the said holding device between Kokillenrohr and Wasserleitmantel is designed as a retaining ring, which is mounted in an outer groove of the Kokillenrohres at the eing cord workedem end and comes to rest on a corresponding cutout along the inner edge at the inflow-side end of the Wasserleitmantels.
  • this ring has a rectangular cross section in the radial direction and has in the radial and vertical directions said tolerances in the range of 0.2-2mm, preferably 0.5mm in the radial direction and 1mm in the vertical direction.
  • the invention provides that the Wasserleitmantel is made of one piece, in which the mold tube can be introduced as a whole: this must be solved or produced when changing the Kokillenrohres only the mechanical connections between Kokillenrohr, Wasserleitmantel, head flange and additionallyflansch
  • FIG. 5 disclosed.
  • the Wasserleitmantel can be permanently assembled from several items - it can be welded together, for example, from several plates or mold pipe parts.
  • the wall thickness of the Kokillenrohres is substantially uniform and is for example 20mm
  • the gap between the outer surface of the Kokillenrohrs and the inner surface of the water jacket is in the range of a few millimeters, for example 4 - 5mm
  • the pressure of the liquid cooling medium is usually several bar, for example 6 bar
  • the flow rate of the cooling medium is typically in a range of 6 - 10m / s, wherein the flow of the cooling medium from the lower, strand outlet side end of the mold upwards, takes place in the direction of the pouring end.
  • the present invention enables billet and billet formats having a cross-sectional area between 0.01 and 0.36 m 2 , preferably between 0.05 and 0.1 m 2 .
  • the inventive design of the mold provides connections by means of pressure screws and lag screws between Wasserleitmantel and mold tube: while the Druckschraubtagenen prevent local expansion of the surface of the mold tube perpendicular to the casting direction in the radial outward direction, while the Switzerlandschraubtagenen a local evasion of the surface of the Kokillenrohres in the radial To prevent direction inside.
  • the tensile and Druckschraubeuren are designed so that they allow only a local thermal movement of the Kokillenrohres parallel to its outer side, but this does not affect the centering of the Kokillenrohrs in Wasserleitmantel: thereby remain the water gap and thus the cooling effect even under the thermal load of the mold tube during the casting process along a circumferential line of the mold tube substantially obtained.
  • the thread for the lag screws of the screw according to the invention without additional measures, such as the application of a reinforcing web to install directly in the wall of the mold tube.
  • the inventive tube mold for metal strands having a rectangular cross section is located along the center line in the casting direction of each of the four cast strand cross-section replicating outer surfaces of the Kokillenrohres a web on which the Druckschraubtagenen act or in which the threads for Switzerlandschraubtagenen are: this Variant is particularly suitable for smaller rectangular formats up to 200 x 200mm with high casting speed.
  • the wall thickness of the Kokillenrohres - apart from said webs - can be reduced, whereby the casting heat of the molten metal can be dissipated faster to the cooling medium.
  • This results in a higher cooling capacity of the mold which in turn allows higher casting speeds and thus a higher production rate.
  • the thermally induced expansion of the mold tube is symmetrical to the center lines of the four outer surfaces, resulting in a symmetrical cooling capacity and a symmetrical cross-section of the cast strand.
  • a thinner wall thickness of the mold tube has a positive effect on electromagnetic stirring coils, since less power loss is induced in the mold tube.
  • the mold tube, the holding device, the Wasserleitmantel, the head flange and the base flange are designed so that the mold tube is automatically centered in Wasserleitmantel during assembly of the mold. This can be done, for example, that the mold tube receiving the openings of the head flange and the Schwarzflansches and the corresponding inflow-side and outflow-side portions on the outer surface of the Kokillenrohres are designed as play fits to each other. The tolerance of the fits is usually fractions of a millimeter.
  • the mold tube is positioned in the water jacket with an accuracy that corresponds at least to the fit tolerance when inserting the mold tube in the Wasserleitmantel to which the numeroflansch is already attached, and in the fixation of the Kokillenrohrs in Wasserleitmantel through the head flange.
  • the sealing rings which seal the water gap against coolant leakage, additionally increase the accuracy of the centering due to their positive position between mold tube and head flange or base flange, so that with a fitting tolerance of preferably 0.5 mm the mold tube with a deviation of less than 0.2 mm is centered in the water jacket.
  • the fit tolerances can also be further reduced if necessary.
  • the cross section of the cast billet material is rectangular, with the side lengths of the cross-sectional area in a range up to 600 x 600mm, preferably between 200 and 400mm, eg 250 x 350mm.
  • smaller formats are also conceivable, for example with rectangular cross sections of 100 ⁇ 150 mm.
  • the outer surface - that is the surface facing the Wasserleitmantel - of Kokillenrohres has an approximately uniform wall thickness and thus includes four even or approximately flat partial surfaces that emulate the rectangular cross-section of the cast metal strands. Between these partial surfaces, rounded edge regions extend whose vertices in the casting direction form an edge line.
  • the mold tube is connected to at least two of the partial surfaces in a central region via tension and compression screws with the Wasserleitmantel, wherein the central region of a partial surface in the casting over the entire length of the mold tube and perpendicular to the casting over a region extending from an edge line counted up to five times the wall thickness of the mold tube to each edge line.
  • numerical simulations have shown that the thermal expansion of the mold tube takes place during the casting operation primarily in the corner areas symmetrical to the central areas of the four partial surfaces, so that the fixing of the mold tube to the water jacket along these central areas by the positive and non-positive tensile strength according to the invention. and Druckschrauborganizen a sufficient dimensional stability is ensured during the casting process.
  • the gap between the mold tube and the water jacket is reduced in the region of the edges.
  • This can be realized for example by corresponding curves with larger radii in the edges on the inside of the water jacket, so that in this area the normal distance between the outer surface of the Kokillenrohres and the inner surface of the Wasserleitmantels to half or a third of the water gap along the four levels or approximately flat partial surfaces is reduced.
  • This has the effect of reducing heat dissipation from the cast metal strand in the edge regions relative to the remainder of the surface, thus preventing the known phenomenon of edge overcooling.
  • the cast metal strand has a round cross section and the mold tube has a uniform wall thickness, so that the outer surface of the mold tube reproduces the round cross section of a metal strand cast therewith.
  • the invention has the Wasserleitmantel to form a uniform water gap also has a round cross-section and is made of one piece, the tensile and Druckschraubeuren between Wasserleitmantel and mold tube are arranged uniformly along the circumference of Kokillenrohres, which is a uniformly distributed along the circumference radial support of the mold tube guaranteed. This promotes symmetrical growth of the strand shell and ensures high quality of the cast metal strand, and allows round bloom formats up to 650mm in diameter.
  • a tension screw and a pressure screw are combined to form a non-positive tensile and Druckschraubriv by the pressure screw between Wasserleitmantel and Kokillenrohr is formed as a threaded sleeve with a first thread in the form of an external thread in a corresponding internal thread in Wasserleitmantel engages, so that the pressure screw on the Wasserleitmantel and the Mold tube acts with compressive force.
  • the pressure screw can be locked with a locking nut on the outside of the water jacket.
  • the lag screw engages through the interior of the pressure screw with a second thread turn in the form of an external thread in a corresponding internal thread on the outside of the mold tube and acts on the Wasserleitmantel and the mold tube with tensile force, the tension screw is designed as an expansion screw, the one thermally induced movement of the mold tube tolerated transversely to the longitudinal axis of the lag screw.
  • the pressure screws have an outer diameter of 16-25 mm, preferably 20 mm
  • the lag screws have an outer thread with a diameter of 8 to 16 mm, preferably 12 mm.
  • the lag screws and the pressure screws are each formed at their outer ends so that they can be adjusted by means of a suitable tool; Moreover, the tensile and pressure screw connections configured in this way have first sealing rings which seal the water-conducting jacket against the escape of cooling fluid when the screws are locked.
  • the pressure screw acts as an adjustable spacer between Wasserleitmantel and mold tube and can be fixed after adjustment with a locking nut on the outside of the water jacket.
  • the lag screw is used for subsequent fixation of the mold tube in Wasserleitmantel in a direction perpendicular to the surface of the mold tube, the diameter of the lag screw is significantly smaller than the inner diameter of the pressure screw, so that such a combination of lag screw and pressure screw tolerates thermally induced transverse movement of the surface of the mold tube ,
  • This interlocking construction of lag screws and pressure screws thus offers the advantage that it fixes the Kokillenrohr selectively in a direction perpendicular to the Wasserleitmantel, but without bending the Kokillenrohr itself by their force.
  • the Wasserleitmantel is stabilized only via pressure screws, effectively prevents deformation of the mold tube by the water pressure with an equal number of breakthroughs by the Wasserleitmantel.
  • the lag screw has a second longitudinal bore in the axial direction, through which a sensor, at the tip of which a sensor element for detecting the temperature is guided to the mold tube, so that the sensor element touches the surface of the mold tube and a good Heat transfer is ensured to the sensor element.
  • a bimetal transition is used as a sensor element for the sensor, wherein the sensor is pressed by means of suitable means, such as a compression spring, against the mold tube.
  • suitable means such as a compression spring
  • the solid strand shell forms due to the heat dissipated from the molten metal, starting at the surface of the metal strand.
  • the cast, but not completely solidified and therefore easily deformable metal strand is deflected after exiting the mold in a roller table in the horizontal direction, the radius of the roller table is several meters, usually 5 - 15m.
  • the metal strand undergoes a corresponding deformation, which leads to stresses in the strand shell, which can lead to cracks and other damage to the strand surface in the sequence.
  • the mold tube at least in a partial region, preferably in a zone at the strand outlet end, a curvature along the casting direction, which points in the same direction as the curvature of the roller table arch.
  • the inner surface of the Wasserleitmantels is shaped so that it follows the curvature and over the entire length of the Wasserleitmantels a substantially uniform water gap to the outer surface of the Kokillenrohrs formed, which is dimensioned so that the mold tube can be introduced as a whole in the Wasserleitmantel.
  • this shaping ensures a uniform water gap and, consequently, a uniform cooling effect along the outside of the mold tube.
  • the Wasserleitmantel does not have to be mounted in several parts of the mold tube, but can be made as a concentric tube for the tube in one piece.
  • the mold tube When passing through the mold tube reduces the cross-section of the cast metal strand due to the solidification of at least a portion of the material due to the associated volume reduction.
  • the area enclosed by the mold tube of a tube mold according to the invention reduces from the pouring to the pouring end, so that the shrinkage of the strand is compensated and there is no lift from the inside of the mold tube, which drastically reduced Cooling effect and quality loss would result.
  • the heat transfer to the cooling medium along the casting direction changes; usually the heat flow is highest in the region of the casting mirror and decreases towards the strand outlet end.
  • this waste can be relatively abrupt, so that the majority of the cooling capacity of the mold is in a narrow region near the feed end, resulting in irregular wear and therefore shortened life of the tube mold or can affect the product quality adversely. It is thus desirable to modify the heat flow between the cast metal strand and the cooling medium along the casting direction in such a way that the mold tube is worn as uniformly as possible or the properties of the cast metal strand are influenced in the desired manner.
  • the cooling capacity depends substantially on the flow velocity of the cooling medium, it can be locally modified by a variable cross-sectional area of the water gap.
  • the area of the water gap between the pouring side and the pouring side, which is flowed through by the coolant varies between the pouring side and the pouring side.
  • the Wasserleitmantel comprises a first flange at its inflow-side end and a second flange at its pouring end and it circulates during the casting operation cooling liquid in the water gap between the Wasserleitmantel and the outer surface of the Kokillenrohres against the casting direction from the pouring end to the pouring end the tube mold, wherein both the inlet openings for the coolant inlet to the tube mold and the outlet openings for the coolant outlet from the tube mold are located on the first flange.
  • the first flange has first inlet channels, by means of which the cooling liquid supplied from outside the tube mold is guided via tubes on the outside of the water guide jacket to the second flange.
  • These tubes are not used for cooling the cast metal strand but only the diversion of the cooling liquid in order to achieve the mentioned flow.
  • the tubes are preferably arranged in the vicinity of the longitudinal edges of the tubular mold, so that a substantial part of the outside of the water-conducting jacket remains accessible, which is advantageous for the efficiency of electromagnetic stirring coils, since they can be applied close to the molten metal.
  • the second flange has second inlet channels through which cooling fluid is further guided into a first annular groove at the pouring end on the inside of the water jacket, this groove extending in the circumferential direction of the water jacket, thereby connecting the second inlet channels together and also serves to supply the Distribute coolant evenly along the outside of the mold tube in order to achieve the most homogeneous possible cooling effect. Because of the pressurization of the cooling liquid, this flows further along the outer surface of the Kokillenrohres to a second annular groove on the inside of the Wasserleitmantels, which also extends in the circumferential direction and is arranged at the inflow-side end of the Wasserleitmantels.
  • the cooling liquid absorbs the casting heat released by the molten metal via the mold tube and is subsequently connected to the outlet openings for the coolant outlet at the first outlet channels, which run perpendicular to the casting direction in the first flange of the water jacket and are interconnected by the second annular groove Flange passed from where it is supplied, for example, an external heat exchanger.
  • This embodiment of the coolant circuit allows a compact construction of the tube mold according to the invention and ensures a uniform cooling effect along the circumference of the Mold tube, so that a high product quality is guaranteed.
  • the first flange at the pouring end of the water jacket has at least four first supply channels for the supply of cooling liquid to the tubes and at least four drainage channels for the removal of the cooling liquid from the water gap and it has the second flange on the pouring side End of the Wasserleitmantels over at least four second supply channels for the supply of cooling liquid to the water gap.
  • the first and the second inlet channels and the drainage channels are each uniformly distributed in the circumferential direction of the tube mold and thereby ensure a uniform flow path of the cooling liquid along the mold tube.
  • the sum of the cross-sectional areas of the first inflow channels, the sum of the cross-sectional areas of the tubes connecting the first flange to the second flange, the sum of the cross-sectional areas of the second inflow channels and the sum of the cross-sectional areas of the flow channels are at least twice the area of the water gap in FIG any cross-section perpendicular to the casting direction of the tube mold.
  • the cooling units used for the cooling circuit can be a high efficiency achieve, wherein the efficiency by the ratio of the amount of heat transported away from the cast product per Time unit is defined to the power used on the cooling unit.
  • the mold tube is initially introduced as a whole in the one-piece manufactured and firmly connected to theticianflansch Wasserleitmantel during assembly of the tubular mold, wherein it comes to rest on the holding device.
  • the mold tube is centered in the water jacket, which can be done automatically in a preferred embodiment of the operating method by means of appropriate devices of the mold tube or the water jacket when inserting the mold tube.
  • the head flange is applied to the mold tube and the water jacket, for example by means of screws, whereby the mold tube is connected via the head flange, the base flange and the holding device with the Wasserleitmantel.
  • the mechanical support action of the water jacket is transferred to the mold tube by the cooperating tension and compression screws, so that in this state, the tube mold for continuous casting of metal strands can be used in a continuous casting.
  • the mold tube for example, because it is damaged and has to be replaced with a new one or has fallen below the permissible wear limit after a corresponding production period of use, first the lag screws dissolved and removed and then released the pressure screws, whereupon the connection between the head flange, the holding device and the Wasserleitmantel is released and then the head flange is removed. Then the mold tube is removed as a whole from the Wasserleitmantel and then replaced by a new or revised Kokillenrohr.
  • the inventive method further offers the advantage that the mold tube directly on the plant or in a usually located nearby mold shop, for example with a crane, from the Wasserleitmantel off or can be levied in this and thus less transport capacity for the revision of the mold tube is needed. Moreover, by using a described self-centering design consuming steps for checking the centering of the mold tube in Wasserleitmantel accounts and the installation cost of assembling the tube mold can be significantly reduced.
  • FIGS. 1 to 8 A first embodiment is shown in different views with reference to FIGS 1 to 8 is explained in more detail.
  • a second embodiment which differs in the embodiment of the tensile and Druckschraubfact between mold tube and water jacket from the first, is accordingly by the FIGS. 1 to 7 and FIG. 9 illustrated.
  • the identifiers are consistent in all figures.
  • the two embodiments are designed for use in a continuous casting, at the Tubular mold immediately downstream of a curved roller table, whose curvature points in the same direction as the curvature of the mold tube, which is not the subject of the invention and will not be discussed in more detail below.
  • FIG. 1 shows in an oblique view the first embodiment of a tube mold according to the invention for the casting of metal strands in the billet format with rectangular cross-section, a curved, exchangeable mold tube 1 with a holding device at the pouring end (in FIG. 1 not visible), a surrounding the mold tube Wasserleitmantel 3 and a head flange 4 at the inflow end and a base flange 5 at the pouring end comprises.
  • the Wasserleitmantel 3 has at the inflow-side end a first flange 6, which via tubes with a second flange 7 on pouring end is connected. Via first inlet channels 19, which are arranged partly on the upper side of the first flange 6, cooling liquid is conducted to the tubes 8 and, via them, further to the second flange 7 located on the pouring side.
  • the mold tube 1 forms with the Wasserleitmantel 3 along its circumferential direction a uniform water gap 11, in which the cooling liquid then flows from the second flange 7 to the first flange 6 in drain channels 21 of the first flange 6.
  • the mold tube 1 is according to the invention along its outer side connected to the Wasserleitmantel 3 via combined pull and Druckschrauborganizen 9.
  • FIG. 2 shows the first embodiment in a view from above: the tube mold has a total of six inlet openings 12 for the coolant inlet and four outlet openings 13 for the coolant outlet, which are arranged uniformly in the circumferential direction on the underside of the first flange 6.
  • Each inlet opening 12 opens into a first inlet channel 19 and each outlet opening 13 is connected to a drainage channel 21 of the first flange 6.
  • the first inflow channels 19 and the outflow channels 21 are mounted along the shorter sides of the rectangular mold at the top of the first flange, while being machined into the inside of the first flange 6 along the longer sides of the rectangular mold.
  • FIG. 3 is a first longitudinal section through the first embodiment of a tubular mold along the in FIG. 2 shown with A - A line.
  • the foot flange 5 is connected by screws 17 fixed to the Wasserleitmantel 3, above the head flange 4, a cover plate 10 is additionally attached.
  • the mold tube 1 has a curvature along the casting direction G, which is visible from the center line M, which from the centers of all cross-sections through the mold tube. 1 is formed perpendicular to the casting direction. With a retaining ring 18, the mold tube 1 comes to rest when introduced into the Wasserleitmantel 3 and is then attached via the head flange 4 in Wasserleitmantel 3, the head flange 4 is firmly connected by screws 17 with the Wasserleitmantel 3.
  • the formed between the mold tube 1 and 3 Wasserleitmantel water gap 11 is fixed by combined tension and Druckschraubtagenen 9, which act substantially perpendicular to the casting direction G.
  • cooling liquid is passed from the tubes 8 into a first annular groove 14 at the pouring end of the water jacket 6, which then flows through the water gap 11 against the casting direction and via a second annular groove 15 through drain channels 21 in the outflow direction a to the connections for the Coolant outlet 13 passes.
  • the second annular groove 15 extends along the circumferential direction of the Wasserleitmantels 3 and connects the water gap 11 with all flow channels 21 of the first flange. 6
  • FIG. 4 shows a second longitudinal section through the first embodiment of a tube mold along the in FIG. 2 B - B line and illustrates the path along the inflow direction z, which takes the liquid cooling medium as it flows into the water gap 11: via the arranged at the bottom of the first flange 6 inlet openings 12 coolant liquid flows through first inlet channels 19 in the tubes 8, over which it first passes from the pouring end to the pouring end of the tube mold.
  • the cooling liquid flows into a first annular groove 14, which is arranged in the circumferential direction along the inside of the water jacket 3 and connects all second inlet channels 20 with each other.
  • the cooling liquid is evenly distributed on entering the water gap 11 along the circumferential direction of the mold tube 1.
  • FIG. 5 is a cross section through the first embodiment of a tube mold along the in FIG. 3 shown with C - C, wherein the vertical projection of the casting direction G as well as in the circumferential direction of the first flange 6 approximately uniform distribution of the six inlet openings 12 and the four outlet openings 13 can be seen.
  • the inlet openings 12 respectively open into the first inlet channels 19 and the outlet openings 13 into the outlet channels 21, wherein the channels are arranged along the shorter sides of the rectangular casting format above the first flange 6 and are therefore not covered by the cross section.
  • the cooling liquid which passes through the water gap 11 during the casting operation ends in the second annular groove 15, which is arranged in the circumferential direction of the water-conducting jacket 3 and connects all the drainage channels 21, thereby ensuring a uniform flow pattern of the cooling medium.
  • FIG. 6 shows the in FIG. 4 marked area of the holding device 2a
  • FIG. 7 shows the in FIG. 3
  • the mold tube 1 when introduced into the Wasserleitmantel 3 first on the arranged in a groove 2a of the mold tube 1 in the circumferential direction retaining ring 18 on a corresponding step-shaped cut-2b of Wasserleitmantels 3 comes to rest.
  • the retaining ring 18 is fixed in the casting between the Wasserleitmantel 3 and the head flange 4, whereby a mechanical connection between the mold tube 1, the Wasserleitmantel 3, the head flange 4 and the base flange 5, which is connected by screws 17 fixed to the Wasserleitmantel 3, arises.
  • the mold tube 1 with its pouring end penetrates the head flange 4 and with its pouring end the foot flange 5, wherein in these areas in each case perpendicular to the casting direction G, a gap with a first gap S1 between the mold tube 1 and the head flange 4 and the disappointingflansch consists.
  • the retaining ring 18 receiving groove of the mold tube 1 is made so that after the introduction of the mold tube 1 in the Wasserleitmantel 3 in the casting direction G between the bottom of the retaining ring 18 and the a gap with a gap S2 exists, wherein in the first embodiment S1 is about 0.5mm and S2 is about 1mm.
  • this embodiment of the attachment of the mold tube 1 is not a rigid mechanical connection but allows slight thermally induced movements or material expansions of the mold tube 1, which may occur during the casting process, whereby undesirable stresses and deformations of the mold tube 1 can be prevented.
  • annular grooves 16 are circumferentially mounted in grooves of the head flange 4 and the inquireflansches 5, which seal the flowed through by the cooling liquid cavity in the region of the first annular groove 14 and the second annular groove 15 to the outer region of the tube mold, so that a closed flow the cooling medium through the tube mold.
  • the seals 16 made of flexible material - such as rubber - made that tolerate the thermal movements of the mold tube in the region of said column.
  • FIG. 8 shows the in FIG. 3 X marked section, in which a longitudinal section through a pull and Druckschraubfact 9 of the first embodiment is shown.
  • the water gap 11 is bridged between the mold tube 1 and the Wasserleitmantel 3 via a pressure screw 22 and a tension screw 23 which engage through a corresponding opening in the water jacket 3 on the mold tube 2.
  • the pressure screw 22 has a first thread 24 which engages in a corresponding mating thread in the opening of the Wasserleitmantels 3 and also has a first longitudinal bore 27 through which a lag screw 23 with a second thread 26 into a corresponding mating thread on the outside of the mold tube 1 engages.
  • the first thread 24 of the pressure screw 22 as external thread with, for example, 24mm diameter and the second Thread 26 of the tension screw 23 configured as an external thread with, for example, 12mm diameter.
  • the pressure screw 22 and the lag screw 23 have at their outer end in each case via a hexagonal screw head, which allows a rotation by means of a suitable tool.
  • each pull and Druckschraubtagen 9 first sealing rings 28 which seal the water gap 11 between the Wasserleitmantel 3 and the pressure screw 22 and between the pressure screw 22 and the lag screw 23.
  • the design and application of the tensile and Druckschraubharm in FIG. 9 corresponds essentially to the embodiment in FIG. 8 : as an additional feature, the Tightening screw on a second longitudinal bore 29 in the axial direction, through which a rod-shaped probe 31 is passed with a sensor element 32 at its tip.
  • the sensor is, for example, a common bimetal sensor for temperature detection (so-called "thermocouple”), in which the contact area between the two different metals is formed as a very small measuring tip at the end of the rod-shaped measuring sensor 31 and represents the sensor element 32 which is in Depending on the measured temperature generates an electrical voltage.
  • the rod-shaped probe 31 is connected in the interior of the lag screw 23 in the region of the second thread 26 via a projection 33 with the lag screw 23, wherein the projection 33 is designed so that the probe 31 when detecting the lag screw in the axial direction against the outer surface of the Kokillenrohres 1 is pressed so that a thermal contact between the mold tube 1 and the sensor element 32 at the end of the probe 31 is made.
  • the interior of the lag screw 23 is sealed in the region of the second thread 26 by a second sealing ring 30 against the escape of cooling liquid.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (13)

  1. Lingotière tubulaire pour la coulée continue de barres métalliques sous la forme de billettes ou de blooms, comprenant un tube de lingotière intérieur remplaçable (1) muni d'un dispositif de retenue (2), une enveloppe de guidage d'eau (3) qui entoure le tube de lingotière (1), ainsi qu'une bride supérieure (4) au niveau de l'extrémité côté entrée de coulée et une bride inférieure (5) au niveau de l'extrémité côté sortie de coulée,
    - dans laquelle le tube de lingotière (1) est relié à l'enveloppe de guidage d'eau (3) par la bride supérieure (4), la bride inférieure (5) et le dispositif de retenue (2),
    - dans laquelle, en coupe transversale à la lingotière tubulaire, perpendiculairement au sens de coulée (G), la face interne de l'enveloppe de guidage d'eau (3) s'étend de manière concentrique à la face externe du tube de lingotière (1) et forme une fente d'eau (11) constante à travers laquelle du liquide de refroidissement destiné à évacuer la chaleur de la barre métallique coulée est guidé,
    - dans laquelle l'enveloppe de guidage d'eau (3) est formée d'un matériau non magnétique et sert de support mécanique pour le tube de lingotière (1),
    - dans laquelle l'enveloppe de guidage d'eau (3) est fabriquée d'une seule pièce dans laquelle le tube de lingotière (1) peut être inséré en entier,
    - dans laquelle le tube de lingotière (1) est relié à l'enveloppe de guidage d'eau par des vis de traction (23) et des vis de pression (22) au niveau de sa face extérieure.
  2. Lingotière tubulaire selon la revendication 1, caractérisée en ce que le tube de lingotière (1), le dispositif de retenue (2), l'enveloppe de guidage d'eau (3), la bride supérieure (4) et la bride inférieure (5) sont conçus de façon que le tube de lingotière (1) soit centré dans l'enveloppe de guidage d'eau (3).
  3. Lingotière tubulaire selon la revendication 1 ou 2, caractérisée en ce que la section transversale de la barre métallique coulée est rectangulaire et la face extérieure du tube de lingotière (1) comprend quatre faces partielles qui reproduisent la section transversale rectangulaire des barres métalliques coulées et, entre les faces partielles, s'étendent des zones d'arête arrondies dont les sommets forment une ligne d'arête dans le sens de la coulée, et en ce que le tube de lingotière (1) est relié à l'enveloppe de guidage d'eau (3) par des vis de traction (23) et des vis de pression (22) dans une zone centrale sur au moins deux faces partielles, la zone centrale d'une face partielle s'étendant sur toute la longueur du tube de lingotière (1) dans le sens de coulée (G) et, perpendiculairement au sens de la coulée (G), sur une zone qui, calculée à partir d'une ligne d'arête, égale jusqu'à cinq fois l'épaisseur de paroi du tube de lingotière (1) au niveau de chaque ligne d'arête.
  4. Lingotière tubulaire selon la revendication 3, caractérisée en ce que la fente d'eau (11) entre l'enveloppe de guidage d'eau (3) et la face extérieure du tube de lingotière (1) est réduite dans les zones d'arête.
  5. Lingotière tubulaire selon la revendication 1 ou 2, caractérisée en ce que la section transversale de la barre métallique coulée est ronde et la face extérieure du tube de lingotière (1) reproduit la section transversale ronde des barres métalliques coulées.
  6. Lingotière tubulaire selon l'une des revendications 1 à 5, caractérisée en ce qu'une vis de traction (23) et une vis de pression (22) coopèrent à chaque fois dans un assemblage par friction par vis de traction et vis de pression (9), la vis de pression (22) entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1) étant réalisée en tant que douille filetée qui se met en prise dans un filet de vis intérieur correspondant dans l'enveloppe de guidage d'eau (3), de sorte que la vis de pression (22) fait fonction d'écarteur réglable entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1) et exerce une force de pression sur l'enveloppe de guidage d'eau (3) et le tube de lingotière (1), et la vis de traction (23) entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1) traversant un premier alésage longitudinal (27) de la vis de pression (22) pour se mettre en prise dans un filet de la face extérieure du tube de lingotière (1) et exerçant une force de traction sur l'enveloppe de guidage d'eau (3) et le tube de lingotière (1),
    - dans laquelle la vis de traction (23) est exécutée en tant que vis extensible qui tolère un mouvement, dû à la chaleur, du tube de lingotière (1) perpendiculairement à l'axe longitudinal de la vis de traction (23),
    - dans laquelle la vis de traction (23) et la vis de pression (22) sont à chaque fois formées, au niveau de leur extrémité extérieure, de façon à pouvoir faire l'objet d'un réglage au moyen d'un outil approprié,
    - dans laquelle l'assemblage par vis de traction et de pression (9) comprend des premières bagues d'étanchéité (28), de façon à assurer l'étanchéité de l'enveloppe de guidage d'eau (3) et à empêcher la sortie du fluide de refroidissement lors du blocage des vis de pression (22) et des vis de traction (23).
  7. Lingotière tubulaire selon la revendication 6, caractérisée en ce que la liste de traction (23) comporte un second alésage longitudinal (29) à travers lequel on fait passer une sonde (31) pourvue, à son extrémité, d'un élément capteur (32) permettant de saisir la température à la surface du tube de lingotière (1).
  8. Lingotière tubulaire selon l'une des revendications 1 à 7, caractérisée en ce que le tube de lingotière (1) présente, au moins dans une zone partielle, une courbure le long du sens de coulée (G), l'enveloppe de guidage d'eau (3) formant, sur toute sa longueur, une fente d'eau uniforme par rapport à la face extérieure du tube de lingotière (1), qui est dimensionnée de sorte que le tube de lingotière (1) puisse être introduit en entier dans l'enveloppe de guidage d'eau (3).
  9. Lingotière tubulaire selon l'une des revendications 1 à 8, caractérisée en ce que l'aire de section transversale entourée par le tube de lingotière (1) diminue dans le sens de coulée (G) du côté d'entrée de coulée vers le côté de sortie.
  10. Lingotière tubulaire selon l'une des revendications 1 à 9, caractérisée en ce que, en coupe transversale à la lingotière tubulaire, perpendiculairement au sens de coulée (G), l'aire de la fente d'eau (11) formée entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1) à travers laquelle s'écoule du fluide de refroidissement varie entre le côté d'entrée de coulée et le côté de sortie de coulée.
  11. Lingotière tubulaire selon l'une des revendications 1 à 10, caractérisée en ce que du fluide de refroidissement s'écoule dans la fente d'eau (11) dans le sens opposé au sens de coulée (G), de l'extrémité de la coquille tubulaire côté de sortie de coulée vers l'extrémité côté d'entrée de coulée, pendant le processus de coulée,
    - l'enveloppe de guidage d'eau (3) étant pourvue d'une première bride (6) au niveau de l'extrémité côté d'entrée de coulée et d'une seconde bride (7) au niveau de l'extrémité côté de sortie de coulée,
    - les ouvertures d'entrée (12) pour l'alimentation de la lingotière tubulaire en fluide de refroidissement et les ouvertures de sortie (13) pour l'écoulement du fluide de refroidissement de la lingotière tubulaire se trouvant au niveau de la première bride (6),
    - la seconde bride (7) étant reliée à la première bride (6) par des tubes (8) sur le côté extérieur de l'enveloppe de guidage d'eau (3),
    - l'enveloppe de guidage d'eau (3) étant pourvue d'une première rainure annulaire (14) dans la direction circonférentielle sur sa face interne au niveau de l'extrémité côté de sortie de coulée et d'une seconde rainure annulaire (15) dans la direction circonférentielle sur sa face interne au niveau de l'extrémité côté d'entrée de coulée,
    - la première bride (6) étant pourvue de premiers canaux d'alimentation (19) qui conduisent le fluide de refroidissement des ouvertures d'entrée (12) vers les tubes (8) et étant pourvue de canaux d'écoulement (21) qui conduisent le fluide de refroidissement de la seconde rainure annulaire (15) vers les ouvertures de sortie (13),
    - la seconde bride (7) étant pourvue de seconds canaux d'alimentation (20) qui conduisent le fluide de refroidissement des tubes (8) vers la première rainure annulaire (14).
  12. Lingotière tubulaire selon la revendication 11, caractérisée en ce que la première bride (6) est pourvue d'au moins quatre premiers canaux d'alimentation (19) et d'au moins quatre canaux d'écoulement (21) et la seconde bride (7) est pourvue d'au moins quatre seconds canaux d'alimentation (20) qui sont répartis à chaque fois de manière uniforme le long de la circonférence du tube de lingotière (1), la somme des aires de section transversale des premiers canaux d'alimentation (19), la somme des aires de section transversale des tubes (8) qui relient la première bride (6) à la seconde bride (7), la somme des aires de section transversale des seconds canaux d'alimentation (20) et la somme des aires de section transversale des canaux d'écoulement (21) est à chaque fois égale à au moins le double de l'aire de la fente d'eau (11) dans une section transversale quelconque perpendiculaire au sens de coulée (G) de la lingotière tubulaire.
  13. Procédé d'exploitation pour une lingotière tubulaire destinée à la coulée continue de barres métalliques sous la forme de billettes ou de blooms, la lingotière tubulaire comprenant un tube de lingotière intérieur remplaçable (1) muni d'un dispositif de retenue (2), une enveloppe de guidage d'eau (3) qui entoure le tube de lingotière (1), ainsi qu'une bride supérieure (4) au niveau de l'extrémité côté entrée de coulée et une bride inférieure (5) au niveau de l'extrémité côté sortie de coulée selon l'une quelconque des revendications précédentes, comprenant ces étapes de procédé :
    - montage du tube de lingotière (1) dans l'enveloppe de guidage d'eau (3), comprenant ces étapes :
    -- insertion du tube de lingotière (1) en entier dans l'enveloppe de guidage d'eau (3) reliée fixement à la bride inférieure (5) et centrage du tube de lingotière (1) dans l'enveloppe de guidage d'eau (3), de manière à former une fente d'eau (11) concentrique entre le tube de lingotière (1) et l'enveloppe de guidage d'eau (3) perpendiculairement au sens de coulée (G),
    -- assemblage du tube de lingotière (1) avec l'enveloppe de guidage d'eau (3) au moyen du dispositif de retenue (2) et de la bride supérieure (4),
    -- réglage de vis de pression (22) qui agissent entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1), de façon qu'elles assurent un pontage de la fente d'eau (11), par concordance de formes, dans la direction normale à la face extérieure du tube de lingotière (1),
    -- réglage de vis de traction (23) qui agissent entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1), de façon à produire un assemblage par friction entre l'enveloppe de guidage d'eau (3) et le tube de lingotière (1) et que la fente d'eau (11) soit fixée,
    - coulée continue d'une barre métallique au moyen de la lingotière tubulaire,
    - démontage et sortie du tube de lingotière (1) de l'enveloppe de guidage d'eau (3), comprenant ces étapes :
    -- desserrage et dépose des vis de traction (23),
    -- desserrage des vis de pression (22),
    -- desserrage de l'assemblage entre la bride supérieure (4), le dispositif de retenue (2) et l'enveloppe de guidage d'eau (3), puis dépose de la bride supérieure (4),
    -- sortie du tube de lingotière (1) d'un seul tenant de l'enveloppe de guidage d'eau (3).
EP16718629.5A 2015-04-16 2016-04-14 Lingotière tubulaire soutenue pour des installations de production de billettes et de blooms Not-in-force EP3283245B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50303/2015A AT517139B1 (de) 2015-04-16 2015-04-16 Gestützte Rohrkokille für Knüppel- und Vorblockanlagen
PCT/EP2016/058231 WO2016166215A1 (fr) 2015-04-16 2016-04-14 Lingotière tubulaire soutenue pour des installations de production de billettes et de blooms

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EP3283245B1 true EP3283245B1 (fr) 2019-01-23

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CN108488613A (zh) * 2018-03-14 2018-09-04 秦皇岛瀚丰长白结晶器有限责任公司 结晶器密封定位铜法兰
AT522037B1 (de) * 2018-12-21 2021-08-15 Primetals Technologies Austria GmbH Kokilleneinheit zum Stranggießen von Metallprodukten sowie Stranggießanlage
CN113145818B (zh) * 2021-01-26 2023-01-17 燕山大学 一种提高结晶器使用寿命的冶炼制造生产工艺及装置
DE102022108298A1 (de) 2022-04-06 2023-10-12 Ronal Ag Kühlvorrichtung, Kühlsystem und Kokille

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DE3207149C1 (de) * 1982-02-27 1983-07-07 Mannesmann AG, 4000 Düsseldorf Stranggiesskokille fuer fluessige Metalle
DE3819492A1 (de) * 1988-06-08 1989-12-14 Voest Alpine Ind Anlagen Knueppel- bzw. vorblock-stranggiesskokille
DE19859040A1 (de) * 1998-12-21 2000-06-29 Km Europa Metal Ag Kokillenrohr und Verfahren zum Rekalibrieren eines Kokillenrohrs
PT1468760E (pt) * 2003-04-16 2005-10-31 Concast Ag Lingoteira tubular para o vazamento continuo

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