WO1987001632A1 - Procede et dispositif de coulee continue - Google Patents

Procede et dispositif de coulee continue Download PDF

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Publication number
WO1987001632A1
WO1987001632A1 PCT/SE1986/000411 SE8600411W WO8701632A1 WO 1987001632 A1 WO1987001632 A1 WO 1987001632A1 SE 8600411 W SE8600411 W SE 8600411W WO 8701632 A1 WO8701632 A1 WO 8701632A1
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WO
WIPO (PCT)
Prior art keywords
casting
mold
melt
pipe
rolls
Prior art date
Application number
PCT/SE1986/000411
Other languages
English (en)
Inventor
Erik Allan Olsson
Original Assignee
Erik Olsson Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erik Olsson Ag filed Critical Erik Olsson Ag
Priority to BR8606863A priority Critical patent/BR8606863A/pt
Priority to DE8686905974T priority patent/DE3683635D1/de
Priority to HU864394A priority patent/HUT43518A/hu
Priority to AT86905974T priority patent/ATE71864T1/de
Publication of WO1987001632A1 publication Critical patent/WO1987001632A1/fr
Priority to NO871949A priority patent/NO871949L/no
Priority to DK241487A priority patent/DK241487D0/da
Priority to FI872097A priority patent/FI872097A0/fi
Priority to KR870700465A priority patent/KR870700426A/ko

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal 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
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould
    • 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
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/146—Plants for continuous casting for inclined casting

Definitions

  • the present invention relates to a continuous casting method with a horizontal or inclined mold, with subsequent treatment of the casting withdrawn from the mold, as well as an apparatus for carrying out the method.
  • the object of the invention is to improve the re ⁇ liability of the casting process, the quality of the casting and its surface finish, as well as to enable smoother casting progress and higher casting rates than is the case with the horizontal casting methods in the prior art.
  • the mold is rigidly fastened to, and sealed against, the holding vessel from which the melt is fed to the mold, and which may be a casting box or a furnace, here ⁇ inafter designated "casting box".
  • a connection means such as a casting pipe or a casting nozzle, which is-also sealingly joined to the mold. The latter is thus not able to move freely from the casting box, casting pipe or casting nozzle, resulting in the pre ⁇ vention of many functions regarded as absolutely necessary for a reliable casting sequence in continuous casting plants with vertical molds.
  • the so-called mold oscillation i.e. the vertical, reciprocal motion of the mold.
  • This motion only has a short stroke of 5-20 mm in the withdrawal direction of the casting, with a rapid return to its upper position, this movement often being called “the stripping stroke”.
  • the mold is usually given a somewhat quicker movement than the casting for the movement in the withdrawal direction, this movement often being known as “negative strip” , since the relative movement thus occurring counteracts the tendency of the melt to adhere to the walls of the mold. Since there is friction between the rapidly solidifying casting skin and the mold walls, any transverse cracks caused by tensional stresses, are compressed during the stripping stroke, these cracks then healing together.
  • the thermally most loaded mold part is revealed at the stripping stroke, indeed for only a short time, but sufficiently long to allow effective lubrication and a certain thermal recovery of this mold part.
  • the slag particles accompanying the melt are able to rise to the surface of the melt, where they can be skimmed off, or be compounded with so-called "casting powder", if such is used.
  • the slag and powder fuse and run down towards the meniscus between melt and mold wall. From here the fusion is pulled by the solidifying skin down through the mold to form a anti ⁇ friction layer between the skin and the mold. wall.
  • the slag particles that do not manage to float up to ' the surface distribute themselves rather uniformly over the cross sec ⁇ tion of the vertical casting.
  • the skin solidifying in the mold shall be given sufficient time to grow in thickness and strength without being subjected to tensional stresses, so that it will be better able to withstand them during the casting withdrawal step.
  • a so-called breaker block is inserted at the junction between casting pipe and mold.
  • the block usually has a smaller through passage than that of the mold, partly to reduce heat transfer at this place and partly thus to fix the position of the weakest section of the solidifying metal, i.e. the place of rupture.
  • this block being made from very resistant material it is subject to heavy wear, and the consequent need of frequent replacement.
  • a liner of a material providing less tendency to stickyness than conventional mold lining is sometimes used to reduce the adherence of the melt to the mold wall.
  • Graphite is the material most used as lining, but it is worn rather quickly particularly on the underside of the mold, against which the casting skin is urged by its own weight, and is thus most subject to both mechanical and thermal stresses. This one-sided engagement in the mold naturally results in un ⁇ even heat dissipation along the periphery of the casting, apart from uneven mold.wear, especially as the casting shrinks., causing an air gap between the upper side of the casting and the mold.
  • the mold is given a continuous or stepwise rotational movement, or is reciprocally turned about its center line.
  • a tubular mold with a surrounding cooling jacket having the task of uniformly distributing the flow and action of the cooling medium along the peri ⁇ phery of the casting, may now be exchanged for the simpler method of spraying the coolant on the mold, since its rotation answers for evening out the cooling action.
  • the mold motion may either be provided by a separate driving means or,, when the casting on withdrawal from the mold is also rotated (as will be described below) , with the aid of the friction present between, casting and mold wall. A relative movement between these surfaces or a stepwise or jerky rotation can then take place by braking the mold movement.
  • An oscillation, i.e. a reciprocatory movement, of the horizontal or inclined mold additionally gives advantages put foreward above for the oscillation of a vertical mold.
  • the requirement for the effective lubri- cation and thermal recovery is, however, that the most affected part, i.e. where the molten metal comes into contact with the mold wall before a skin has been formed. 5 i.e. in conjunction with the striping stroke, is main ⁇ tained free from melt, i.e. the melt continuously fed to the mold is kept out of contact with this part of the mold wall.
  • the electromagnetic permeability of the mold material For the most usual metallic mold materials and thicknesses the frequency will usually be 60 Hz or less. If the need arises, which may be the case for larger casting dimensions, the electromagnetic permeability can be facilitated by the use of other, pre ⁇ ferably non-metallic material, e.g. graphite, in the relevant mold part. This material can be formed into an insert in the mold, the wall of which is thinned off towards the inlet end. In the rotation of a circular casting, the risk of longitudinal cracks is less, irrespective of the mold motion, if the meniscus, i.e. the line of contact between melt and mold wall, has a varying distance to the mold end or casting pipe mouth along the periphery of the casting.
  • the meniscus i.e. the line of contact between melt and mold wall
  • This relationship occurs automatically for a conductor loop arranged concentrically round the mold, since the static pressure of the metal in the mold is greater upwards than downwards, and this is the pressure acting against the uniformly distributed repelling force.
  • this force acting on the melt, and thus the. path of the contact line (meniscus) round the periphery may. be varied with the aid of electromagnetic field properties known per se.
  • the repelling force may thus be weakened, or strengthened along desired areas.by screens, asymmetric coils or welding another material into the conductor for a given distance such as to vary the current density.
  • the reason for the above-mentioned lessening of the risk of longitudinal surface cracks is that for the "unsymmetrical" line of contact the growth of the skin does not only take place in the longitudinal direction but also around the periphery.
  • the contact line of a casting where the line is inclined to an imaginary plane at right angles to the center line of the mold, the skin growth takes place in the approximate form of a helix.
  • the shrink ⁇ age of the casting skin periphery due to the solidification of the melt against the mold wall is thus continuously compensated by a continuous supply of melt solidifying against the mold wall, the melt thus making up the shrink- age both peripherally and longitudinally, which does not customarily take place.
  • the outer skin layer thus adjusts itself better to the periphery of the mold and is in en ⁇ gagement with the cooling mold wall for a longer distance than is otherwise the case. From, this it follows that the gap between skin and wall will be less, and occur at a greater distance from the meniscus than otherwise is the case, simultaneously as the part of the casting given the worst cooling, due to the gap formation as the casting rotates, once again comes into contact with the cooling mold wall.
  • the gap formation in the mold is a great dis ⁇ advantage in that the almost absent cooling action of the
  • the agent may comprise a vegetable or mineral oil, a so-called casting powder or a metal with a considerably lower melting point than that of the cast metal, e.g. lead, vismuth, aluminium or other easily melted metal alloys.
  • Metals heavier than the cast metal should be supplied through ducts in the lower part of the casting pipe, or along the part facing the downwardly moving part of the rotating mold, while metals lighter than the cast metal should be supplied to the upper part of the mold or to the upwardly moving part of it. This is to avoid a portion of the heavier metal sinking in. the melt, or the reverse, which is that a portion of the lighter metal rises in the melt.
  • the flank of the projecting casting pipe facing, towards the rotational direction of the casting must be give a configuration, i.e. inclination in relation to an imaginary plane at right angles to the center line of the mold, such that the risk of the rotating skin being thrust in between the projecting casting pipe and the mold wall does not exist.
  • An increase in pressure may be achieved by inclining the casting a few more degrees in the direction, of casting, or by arranging an electromagnetic force acting on the casting skin or wall in the direction of casting.
  • the magnetic field should be placed where the temperature of the casting is still over the curie point, and the conductor current strength and frequency adjusted to the solidified skin or wall thickness of the casting as well as the rotational speed thereof.
  • Casting tubular, or otherwise hollow castings can be accomplished in accordance with the invention by a still liquid core being prevented from filling out its surrounding skin with the aid of an electromagnetic force acting on the casting in the opposite direction to that of casting.
  • the rotation of the casting guarantees a uniform skin or wall thickness as well as the central location of the hole. It is often an advantage to divide the electromagnetic field into two or more sections. The electric windings generating these sections are suitably mutually separated with respect to current strength and frequency, as well as being movable individually or all together along the casting.
  • thin-walled castings, e.g. tubes are to be cast, it is simpler to incline the mold and casting. upwards in the casting direction.
  • the level of the melt or its length inside the casting skin is then allowed to determine the tube thickness, which will be uniform, due to the rotation and uniform cooling of the casting. Should a casting box which is in communication with the mold and tippable about the center line thereof be used., the melt level or its length inside the skin may be decided by the tipping angle of the box and thus the melt level in it. Otherwise the flow of melt to the mold must be controlled by other methods, e.g. by a stopper and coupling, bash inserted in the box, a gate in the casting, pipe between box and mold or by electromagnetic control of the melt flow through the pipe.
  • FIG 1 illustrates an apparatus in accordance with the invention in a side view and partially longitudinal section.
  • FIG 1A is a cross section along the line A - A in FIG 1
  • FIG 1B is a cross section along the line B - B in FIG 1
  • FIG 2 illustrates an apparatus in accordance with the invention in a side view and partially longitudinal section.
  • FIG 3 is a longitudinal section of a detail in a inventive apparatus,
  • FIG 4 illustrates an apparatus in accordance with the invention in a side view
  • FIG 5 is a plan of the apparatus according to FIG 4
  • FIGs 6-8 illustrate means for further processing in the apparatus according to FIGs 4 and 5.
  • a simple embodiment is illustrated in FIG 1 of a mold 1 , freely movable in relation to a casting pipe 2 and cooled by sprayed-on liquid 4.
  • the mold comprises a simple tube, suitably of a material having good conductivity, e.g. copper, and is supported by rollers 5,6. These are provided with flanges 7, which mate with a groove 8 milled into the tube.
  • the mold tube 1 is thus positionally fixed longitudinally, while being able to expand freely in this direction.
  • the tube 1 is provided with a chainwheel 9 at its; discharge end for rotation or turning (i.e. rotation through less than 360°) .
  • the chainwheel is driven by a motor via a sprocket 11 and chain 10.
  • the motor is suit ⁇ ably reversible and with variable speed.
  • the drive means 12 for the sprocket 11 can be configurated in several conventional ways.
  • a conductor means supplied with alternating current is placed round the gap joint 14.and the mold tube.
  • the purpose of this is to prevent, melt penetrating into the spalt joint, which is the space between the tube 1 and a casting pipe or casting nozzle 2 fastened to the unillust- rated casting box or furnace and through which melt is supplied to the tube 1.
  • the alternating electromagnetic field generated in the conductor induces alternating currents in the melt.
  • the result of this arrangement is that there is a repelling force directed towards and at right angles to the conductor and its surrounding electromagnetic field. This force urges the melt away from the gap and the sur ⁇ face of the mold tube within the zone of action of the electromagnetic field.
  • the repelling action of the field on the melt is dependent on the electromagnetic permeability of any intermediate material, and its thickness.
  • the distance to the conductor also plays a decisive role.
  • the thickness of the mold wall has therefore been reduced in this part of the mold tube (at the arrow 15) .
  • An anti-friction agent which does not reduce the tendency of the melt to adhere to the tube wall, but reduces the friction between the. tube wall and the casting skin solidifying against it.
  • This agent is supplied through a pipe 16.
  • the location of this pipe around the mold tube or the casting pipe/nozzle should be appropriate to the agent used, as already de ⁇ scribed above. Metering out the agent may performed by an advancing screw in the extension of the illustrated pipe 16.
  • the rollers 5,6 for mold tube rotation/turning and the sprocket 11 with its drive are arranged in a frame to a base plate 17.
  • the base plate can be carried by wheels, wheel segment or, as illustrated in the FIG, by needle bearing pads 18. These provide low friction for the reciprocatory movements of the mold and its driving means.
  • This movement can take place using an eccentric, cam or a cylinder-piston means 19, which may either be hydraulic or pneumatic.
  • a stepping motor can be used for a stepping movement of the mold, or a system built up together with the mold oscillation, the mold then being rotated one step at the stripping stroke.
  • a certain amount of peripheral negative strip may be used here, i.e. the. mold is turned back a small amount, e.g. by spring action in the means providing the turning movement.
  • roller rings instead of allowing the mold to be supported directly by the rollers, different mold sizes can then be inserted in the roller ring.
  • the casting pipe may include an inner wear-resis ⁇ tant refractory material such..as zirconium oxide, alumina with over 90% A1 0 , magnesite etc. If the inner tube is wound with a electric resistance, wire, an effective barrier against heat transfer is obtained.
  • an inner wear-resis ⁇ tant refractory material such..as zirconium oxide, alumina with over 90% A1 0 , magnesite etc. If the inner tube is wound with a electric resistance, wire, an effective barrier against heat transfer is obtained.
  • a peripheral negative strip may be used to advantage when the mold is rotated stepwise. Possible . transverse cracks can then be pressed together and be healed up. With chain or belt transmission this can be readily arranged so that the non-rdriven transmission part is pressed in, e.g. by a jockey wheel, a certain amount of counter movement then taking place.
  • FIG 2 is a schematic side view of a casting, partially in vertical section, in a multi-line casting plant for manufacturing hollow castings, e.g. tubes with desired wall thickness, hollow shaft or hollow blanks for machining etc.
  • the casting box 24 is common to all the molds 21 and castings 20 sloping upwards in the casting direction, where the castings may have different dimensions.
  • the lateral spacing of the molds and castings is assumed to be unalterable, and therefore the spacing of the casting pipes 22 mounted on the box and projecting into the molds must also be constant, i.e. unaffected by any expansion of the plate casing 24 round the box due to heat. For this reason the casing has been provided with a cooling jacket between each pipe.
  • the casting box is placed on a slide 27, dis- placeable in the longitudinal direction of the castings by cylinder-piston means 26, the slide being a part of a carriage 28, displaceable transverse this direction. This arrangement allows rapid exchange of an emptied casting box.
  • the melt 23 in the box 24 communicates via the pipes 22 with each mold 21 , which is thus filled to a level corresponding to the melt level in the box 23.
  • the length of the melt core within the solidified casting skin, and thereby the length along which the skin grows in thickness, is thus dependent on the melt level in the box 23.
  • Rapid exchange of the box 24 requires the same inclination of all casting pipes, molds and castings in FIG 2, but the height of them in relation to a selected melt level in the box can be varied from casting to casting, if so desired, and the dimension of the molds and castings may also be varied one from the other.
  • the desired wall thickness of each casting may now be determined by selecting the appropriate withdrawal and casting rates, these being set by the respective speeds of the driving rolls 29.
  • Continuous withdrawal of the casting with its skin 20' from the mold has been enabled in accordance with the present invention by an electromagnetic field with a repelling action on the melt in the mold having been arranged, and which prevents bridging over between melt solidified on the casting pipe and the skin solidified in the mold.
  • the electromagnetic field is generated by the conductor 30 being passed through by a high-strength current and placed level with the pipe about the mold 21. This location is necessary so that the flow of melt through 5 the casting pipe 22 will not be disturbed, or quite simply prevented, as would be the case if only penetration of melt into the gap between mold and pipe were prevented according to SE 417 484.
  • This method can be used in certain, cases in combination with the present invention, 10. howe-ver, which will be explained more closely below.
  • the drive rolls are inclined in relation to the center line of the casting to give the hollow casting 20, and thereby the solidified casting skin 20 in the mold 21 a rotational movement. If the rotational speed of the skin 15 is made sufficiently large in relation to the rate of withdrawal of the casting, the thickness of the skin formed, i.e. the wall thickness of the casting, will be the same all the way around the periphery. If optional resetting of this arrangement is desired, the drive means 0 of the casting may be placed on swive lable base plates, with the aid of which the inclination of the rolls and thus the rotational speed of the casting in relation to its rate of withdrawal may be changed. In this case it is of course simplest to have all the rolls either horizontal 5 or vertical, and not transverse, as illustrated in FIG 2.
  • the rotation or turning of the mold is performed by a drive means, and according to FIG 2, this includes a motor 31 with an operable clutch 32, a chain transmission 33 and a chainwheel rigidly mounted on the mold tube.
  • a drive means includes a motor 31 with an operable clutch 32, a chain transmission 33 and a chainwheel rigidly mounted on the mold tube.
  • the mold drive means may be cut out by disengaging the clutch 32.
  • a braking means may be arranged for periodically breaking or stopping this movement, such 5 means working on a clutch half, for example, and being enabled or disabled by an electromagnet.
  • the casting may be cut into desired lengths by conventional methods.
  • a rotating casting affords several possibilities of shaping heat working, some examples of which are given later on in this description.
  • the withdrawal means for the casting 20 may be optionally implemented so that a certain amount of heat working, e.g. to given dimensions or shaping of the casting, can be performed, but a forging machine arranged after the drive rolls may also be a rational solution in the process of continuously producing bar stock.
  • the tools required for such operations are naturally made from material suitable for heat working, and are cooled with a suitable medium where necessary.
  • the horizontal casting, cast according to FIG 1 can be rotated or turned, similar to the hollow one upwardly inclined in its transport direction according to FIG 2. Particularly .in the horizontal casting.of steel and other metals difficult to melt, where the still unsolidi- fied melt in the interior of the casting will be elongate and sharply pointed, there will often be cavities and porousness in the central zone of the casting.
  • the ex- planation of this is that more or less periodical bridgings of chrystallised melt to in front of the core tip, before the center of the casting as solidified completely. Another reason is certainly the decreasing visosity of the more and more tapering melt core in the interior of the casting as a consequence of successive lowering of temperature and separation on to chrystallisation cores.
  • the static pressure in the melt at the tip is too weak for melt to be urged forward to fill the cavities resulting from solidification shrinkages.
  • Some success has been obtained in improving the interior structure of the casting by using electro ⁇ magnetic agitation of the melt in the core tip.
  • the tendency to have faults in the center may be reduced by a certain amount of downward inclination of the cast ⁇ ing reducing the static pressure in the core tips together with the rotation of the casting.
  • FIG 3 An example is illustrated in FIG 3 of a plant where mold unit and casting are inclined in the direction of casting. It is also shown here how the mold tube 21 can be rotated or turned in a cooling jacket 40 of approximately the same kind as used in vertical casting.
  • the electromagnetic inductor 41 is built into the jacket 40, which is made from a magnetic material, or is at least provided with welded-in strips of such material, to prevent leaking eddy currents from heating the jacket.
  • the annular yoke 42 consisting of laminated plates, serves to facilitate and amplify the electromagnetic flux round the conductor.
  • a means according to SE 417 484 may be used .together with the means 41 , 42 of the present invention.
  • the laminated ring 44 between the electric conductor 43 and the casting pipe 45, 46 prevents the electromagnetic, substantially radially directed forces from closing in and disturbing the flow of the melt 23 through the casting pipe 45, 46.
  • the conductor 43 disposed around the pipe may now be supplied with a current at a higher frequency than the current supplied to the one around the mold, since there is no electrically conductive material between melt and conductor.
  • the electromagnetic repelling force is indeed lower for higher current frequency, but the heat generated in the melt will be greater, which assists in preventing adherence of solidified melt on the pipe and bridging of solidified melt between it and the skin solidified in the mold in the area where the action of the electromagnetic inductor arranged outside the mold ceases.
  • This arrangement can be advantageous when the casting is cut by a stationary cutter and when the inductor 41 is supplied with direct current.
  • the action of the repelling force from the d.c. inductor 41 ceases. Melt bridging between casting pipe 45 and skin 20' can consequently occur.at 45' since the action of the a.c. conductor 43 is maintained.
  • FIG 4 - 8 illustrate as examples a survey of some different applications of an apparatus in accordance with the invention, FIG 4 illustrating the casting machine itself as seen from one side, and FIG 5 from above.
  • the casting 21, produced and rotating in this machine is cut to desired casting lengths in the usual way, using a blowtorch 51 in FIGS 4 and 5, or is alternatively taken directly into a roll stand or forging machine.
  • FIG 6 a planetary rolling mill has been utilised, and is characterised by a plurality of taper ⁇ ing rolls 67 being driven planetarily round the casting 21 , which is thus given the desired dimension.
  • the rotating casting can be given a surface treatment, such as a hot grinding descaling process or working by one or more scraper tools arranged along the casting.
  • a heating or heat equalisation stretch may also be desirable.
  • the planetary roll ⁇ ing mill Illustrated in FIG 5 may optionally be ex ⁇ changed for, or supplemented by, stationray rotating rolls 68 (FIG 7) , thus making driving of the rollers considerably more simplified compared with the mill drive.
  • the advantage with direct rolling of the rotating casting is inter alia that different casting dimensions can be achieved for one and the same cast ⁇ ing dimension, even during the course of one casting procedure, by setting the roll nip to the desired amount.
  • the rolled-down casting 21 can then, possibly after passage through a further heating or heat equalisation stretch (unillustrated) , be taken to a conventional mill, e.g. for the production of reinforcing bars or wire. Rotation of the casting must be stopped for. this purpose. Accord ⁇ ing to FIG 8, this takes place by the rotating roll - leader 69 taking the casting in circular form 70 into the rotating drum 71, from which the casting is taken out tangentially to the rolling mill 72 for further rolling or shaping. Possibly necessary, unillustrated equipment for temperature adjustment can be arranged in the drum.
  • casting is performed from a ladle 54 provided with a sliding gate 52 and casting pipe 53.
  • gate and therewith the flow of melt to the casting vox 24, may suitably be automatically regulatable in respect of the filling level in the box.
  • the latter is tippable about the center line of the mold 20 and casting with the aid of a piston-cylinder means 55, suitably automatically regulated in respect of the melt level in the box 24.
  • a carriage 56 which is movable transverse the casting direction.
  • the casting box 24, which has its casting pipe 22 projecting into the mold opening must be moved in the longitudinal direction of the mold.
  • the box is therefore placed on a slide 57, which can be rapidly moved from its position during casting with the aid .of the piston-cylinder means 58.
  • the previously described electromagnet',c inductor around the foreward end of the tube mold 20 is denoted by the numeral 59. Since the mold rotates, uniform cooling can be achieved by direct spraying of water 60.
  • the rotation or turning of the mold is performed by the drive means 61, and longitudinal oscillation by the -cylinder 62. Secondary cooling is denoted by 63 and the support rolls for the rotating casting 21 by 64.
  • a travelling means 65 for electromagnetically acting on the melt at the center of the casting.
  • the inclined rolls 66 for roational advance of the casting 21 have been shown as lying in different planes, but if it is desired to have rotation adjustable in relation to the advancing rate, they should preferably be placed such that they only engage against the casting from two directions, in order to obtain a simpler drive, which has already been mentioned in connection with FIG 2.
  • drive equipment for the rolls has not been shown in the FIG. This can be performed in different conventional ways.
  • the advancing rate can, of course, be made automatically regulatable in respect of the position of the liquid core tip, which may be sensed by such as supersonic methods.
  • the repelling force exercised by the electromagnetic inductor 59 must always be somewhat greater than the static pressure prevailing in the lower part of the mold, it is suitable to introduce here, as well, the automatic regulation of current strength and/or frequency of the current supplied to the inductor in relation to the indicated melt level in the casting box.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pinball Game Machines (AREA)
  • Moulding By Coating Moulds (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Dans un procédé de coulée horizontale en continu à l'aide d'un moule horizontal ou incliné (1), dans lequel on soumet à un traitement thermique la pièce coulée qui se solidifie au moins partiellement dans le moule, ce dernier est alimenté en bain de fusion (13) à partir d'un four ou d'un châssis basculant de préférance autour de la ligne centrale du moule, et via une conduite de coulée (2), dont l'extrémité avant fait saillie dans l'ouverture du moule. Le moule (1) est mobile par rapport à la conduite (2) et tourne en continu ou par pas dans un sens, ou effectue un mouvement de va-et-vient autour de sa ligne centrale. La formation de ponts de matières solidifiées (13) entre la conduite (2) et la croûte de moulage (20) solidifiée dans le moule (1) est empêchée par une force électromagnétique de répulsion agissant dans un sens essentiellement radial sur le bain de fusion (13) s'écoulant dans le moule.
PCT/SE1986/000411 1985-09-13 1986-09-15 Procede et dispositif de coulee continue WO1987001632A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BR8606863A BR8606863A (pt) 1985-09-13 1986-09-15 Processo e aparelho para fundicao continua
DE8686905974T DE3683635D1 (de) 1985-09-13 1986-09-15 Kontinuierliche giessanlage und verfahren.
HU864394A HUT43518A (en) 1985-09-13 1986-09-15 Method and apparatus for continuous casting
AT86905974T ATE71864T1 (de) 1985-09-13 1986-09-15 Kontinuierliche giessanlage und verfahren.
NO871949A NO871949L (no) 1985-09-13 1987-05-12 Fremgangsmaate og utstyr for kontinuerlig stoeping.
DK241487A DK241487D0 (da) 1985-09-13 1987-05-12 Fremgangsmaade og aggregat til kontinuerlig stoebning
FI872097A FI872097A0 (fi) 1985-09-13 1987-05-12 Foerfarande och anordning foer straenggjutning.
KR870700465A KR870700426A (ko) 1985-09-13 1987-05-12 연속주조를 위한 방법과 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8504252-1 1985-09-13
SE8504252A SE464619B (sv) 1985-09-13 1985-09-13 Saett och anlaeggning foer straenggjutning med horisontell eller lutande kokill

Publications (1)

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WO1987001632A1 true WO1987001632A1 (fr) 1987-03-26

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PCT/SE1986/000411 WO1987001632A1 (fr) 1985-09-13 1986-09-15 Procede et dispositif de coulee continue

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EP (1) EP0237558B1 (fr)
JP (1) JPS63500925A (fr)
KR (1) KR870700426A (fr)
CN (1) CN86106731A (fr)
AT (1) ATE71864T1 (fr)
AU (1) AU587867B2 (fr)
BG (1) BG80126A (fr)
BR (1) BR8606863A (fr)
DE (1) DE3683635D1 (fr)
DK (1) DK241487D0 (fr)
ES (1) ES2001785A6 (fr)
FI (1) FI872097A0 (fr)
HU (1) HUT43518A (fr)
NO (1) NO871949L (fr)
PT (1) PT83360B (fr)
SE (1) SE464619B (fr)
SU (1) SU1695822A3 (fr)
WO (1) WO1987001632A1 (fr)
ZA (1) ZA866963B (fr)

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US6340442B1 (en) * 1994-09-10 2002-01-22 Iloma Automatisierungstechnik Gmbh Method and apparatus for producing molded tubular objects from polymer concrete
WO2018192903A1 (fr) * 2017-04-20 2018-10-25 Inteco Melting And Casting Technologies Gmbh Procédé et dispositif servant à la fabrication de lingots à partir de métal

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WO2002002880A1 (fr) * 2000-07-03 2002-01-10 Caroma Industries Limited Ameliorations apportees a une installation d'elements de toilette et a des composants correspondants
EP2025432B2 (fr) * 2007-07-27 2017-08-30 Concast Ag Procédé destiné à la production de produits allongés en acier par coulage en continu et laminage
DE102009035402A1 (de) * 2009-07-30 2011-02-03 Sms Siemag Ag Vorrichtung und Verfahren zur Detektion der Druckverteilung des in einer Stranggießanlage oder Walzstraße aufgebrachten Kühlmediums
CN103231032A (zh) * 2013-05-28 2013-08-07 辽宁恒大重工有限公司 合金坯料的真空连续铸造装置及其铸造方法
CN111112566B (zh) * 2019-12-30 2020-11-20 燕山大学 一种提高内螺纹铜管螺纹质量的方法及其水平连铸装置
CN114472833B (zh) * 2022-01-04 2023-09-01 河南科技大学 一种用于水平连铸的转动炉体式热型连铸装置
CN115319035B (zh) * 2022-08-19 2023-10-31 眉山市博眉启明星铝业有限公司 一种铝锭连铸生产线浇铸装置

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US2837791A (en) * 1955-02-04 1958-06-10 Ind Res And Dev Corp Method and apparatus for continuous casting
CH482480A (de) * 1968-07-19 1969-12-15 Olsson Ag Erik Vorrichtung zum Stranggiessen
US3598173A (en) * 1968-10-17 1971-08-10 Olin Mathieson Continuous casting machine having a variable mold length and adapted for casting in a variety of sizes at high speed
CH578389A5 (en) * 1974-06-15 1976-08-13 Von Roll Ag Horizontal continuous casting plant for cast-iron - or non-ferrous metals, using intermediate mould chambers on rotary table
EP0038275A1 (fr) * 1980-04-15 1981-10-21 CREUSOT/LOIRE-VALLOUREC (Société en nom collectif) Dispositif de coulée continue d'ébauches de tubes métalliques
EP0067433A1 (fr) * 1981-06-17 1982-12-22 Kawasaki Jukogyo Kabushiki Kaisha Installation de coulée continue horizontale
EP0068402A1 (fr) * 1981-06-25 1983-01-05 Kawasaki Jukogyo Kabushiki Kaisha Installation de coulée continue horizontale

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FR2565302B1 (fr) * 1984-06-05 1986-10-10 Aerospatiale Dispositif d'assujettissement provisoire dans l'espace de deux pieces bord a bord
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FR1144396A (fr) * 1955-03-12 1957-10-11 Degussa Procédé et dispositif pour le retrait des barres coulées, lors du procédé de coulée en barres
CH482480A (de) * 1968-07-19 1969-12-15 Olsson Ag Erik Vorrichtung zum Stranggiessen
US3598173A (en) * 1968-10-17 1971-08-10 Olin Mathieson Continuous casting machine having a variable mold length and adapted for casting in a variety of sizes at high speed
CH578389A5 (en) * 1974-06-15 1976-08-13 Von Roll Ag Horizontal continuous casting plant for cast-iron - or non-ferrous metals, using intermediate mould chambers on rotary table
EP0038275A1 (fr) * 1980-04-15 1981-10-21 CREUSOT/LOIRE-VALLOUREC (Société en nom collectif) Dispositif de coulée continue d'ébauches de tubes métalliques
EP0067433A1 (fr) * 1981-06-17 1982-12-22 Kawasaki Jukogyo Kabushiki Kaisha Installation de coulée continue horizontale
EP0068402A1 (fr) * 1981-06-25 1983-01-05 Kawasaki Jukogyo Kabushiki Kaisha Installation de coulée continue horizontale

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6340442B1 (en) * 1994-09-10 2002-01-22 Iloma Automatisierungstechnik Gmbh Method and apparatus for producing molded tubular objects from polymer concrete
WO2018192903A1 (fr) * 2017-04-20 2018-10-25 Inteco Melting And Casting Technologies Gmbh Procédé et dispositif servant à la fabrication de lingots à partir de métal
US11020795B2 (en) 2017-04-20 2021-06-01 Inteco Melting And Casting Technologies Gmbh Method and device for producing foundry ingots from metal

Also Published As

Publication number Publication date
SU1695822A3 (ru) 1991-11-30
KR870700426A (ko) 1987-12-29
EP0237558A1 (fr) 1987-09-23
CN86106731A (zh) 1987-05-13
FI872097A (fi) 1987-05-12
NO871949D0 (no) 1987-05-12
HUT43518A (en) 1987-11-30
SE8504252L (fr) 1987-03-14
BG80126A (bg) 1993-12-24
AU587867B2 (en) 1989-08-31
DK241487A (da) 1987-05-12
EP0237558B1 (fr) 1992-01-22
PT83360B (pt) 1993-01-29
DK241487D0 (da) 1987-05-12
ATE71864T1 (de) 1992-02-15
PT83360A (en) 1986-10-01
AU6374786A (en) 1987-04-07
DE3683635D1 (de) 1992-03-05
SE464619B (sv) 1991-05-27
BR8606863A (pt) 1987-11-03
JPS63500925A (ja) 1988-04-07
ZA866963B (en) 1987-05-27
ES2001785A6 (es) 1988-06-16
SE8504252D0 (sv) 1985-09-13
FI872097A0 (fi) 1987-05-12
NO871949L (no) 1987-07-07

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