EP3135402A1 - Lingotiere et procede destine a la surveillance d'une lingotiere - Google Patents

Lingotiere et procede destine a la surveillance d'une lingotiere Download PDF

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Publication number
EP3135402A1
EP3135402A1 EP15182676.5A EP15182676A EP3135402A1 EP 3135402 A1 EP3135402 A1 EP 3135402A1 EP 15182676 A EP15182676 A EP 15182676A EP 3135402 A1 EP3135402 A1 EP 3135402A1
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EP
European Patent Office
Prior art keywords
distance
side plate
sensor
narrow side
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15182676.5A
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German (de)
English (en)
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EP3135402B1 (fr
Inventor
Oliver Lang
Guenter Leitner
Nicole OBERSCHMIDLEITNER
Christian ORTNER
Martin Schuster
Martin Winder
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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Priority to EP15182676.5A priority Critical patent/EP3135402B1/fr
Publication of EP3135402A1 publication Critical patent/EP3135402A1/fr
Application granted granted Critical
Publication of EP3135402B1 publication Critical patent/EP3135402B1/fr
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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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
    • 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
    • B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls

Definitions

  • the invention relates to a mold, comprising a first and a second narrow side plate whose distance from one another is adjustable, and a first and a second broad side plate. Furthermore, the invention relates to a method for monitoring such a mold.
  • Molds of the aforementioned type are used, for example, in continuous casting plants for casting metallic strands, in particular for casting slabs.
  • one of its two wide side plates is immovably arranged, whereas their other broadside plate is movably arranged to the first wide side plate.
  • the wide side plates are pressed most of the time over with a predetermined contact pressure against the narrow side plates. This is intended to prevent the mold from leaking at the contact surfaces between the narrow and wide side plates and liquid metal and / or liquid casting powder between the plates emerging from the mold.
  • the casting width of the mold which is predetermined by the distance between the narrow side plates to each other, can be adjusted for example between individual continuous casting processes (casting operations) by lateral movement of the narrow side plates. If no metal strand is present in the casting volume of the mold during adjustment, this is referred to as cold adjustment. In the cold adjustment foreign bodies, such as remnants of casting powder, between the narrow and wide side plates are clamped, so that a gap between the each adjacent narrow and wide side plates remains.
  • the adjustment of the casting width can also be done during the continuous casting process itself.
  • the contact pressure of the broad side plates is reduced and set the distance of the narrow side plates to a desired value.
  • liquid metal can penetrate between the (water-cooled) narrow and wide side plates and solidify there.
  • thermocouples on the narrow side plates, in particular near the edges, in order to be able to determine the formation of fins on the basis of a temperature change in the continuous casting process.
  • An object of the invention is to provide a mold of the type mentioned above or a method for monitoring such a mold, by means of which or which a metallurgical process, in particular a continuous casting process, can be carried out efficiently.
  • the mold according to the invention comprises a first and a second narrow side plate whose distance from each other is adjustable, and a first and a second broad side plate.
  • the mold according to the invention has at least one distance sensor which is set up to generate a distance-dependent sensor signal and which is arranged such that the sensor signal is dependent on a distance between the first narrow side plate and the first broadside plate.
  • the invention is based on the consideration that a fin formation in a metallurgical process, such as a continuous casting process, leads to a reduced efficiency of the process can lead, in particular if due to the formation of fins the metallurgical process must be interrupted and / or other time / cost consuming measures must be taken. However, if the generation of fins can be detected early or even avoided by monitoring a measured quantity, a downtime of the respective metallurgical plant can be shortened or completely avoided. Accordingly, the metallurgical process can be cost and / or time efficient.
  • the invention proceeds from the recognition that at or before the formation of a fin between the first narrow side plate and the first wide side plate, the distance between these two plates increases because liquid metal penetrates between the plates, from which the fin forms.
  • the distance sensor which generates a sensor signal which depends on said distance, the distance between these plates or a variable dependent on this distance can be determined.
  • the formation of a fin or the condition for the formation of a fin such as. a gap existing between the narrow side plates and the wide side plates.
  • Methods of detecting fin formation based on temperature measurements are susceptible to failure because changes in temperature in the mold can also be due to processes other than finning.
  • the invention enables a reliable early recognition of a fin formation from the sensor signal, since a change in the distance between the plates is either directly due to an incipient fin formation or a change in the spacing (eg due to a gap between the plates, in the liquid metal can penetrate) with high probability leads to a Finn formation.
  • a temperature change in the mold which is due to a Finn Struktur, occurs only with a certain time delay after the onset of Finn Struktur.
  • fin formation in processes based on temperature measurements can only be detected with a certain time delay.
  • the invention makes it possible, in particular, to detect a formation of fins at an early stage or even to predict the formation of fins, since the change in distance preferably occurs immediately after the formation of the fins or even before the formation of the fins.
  • the mold is preferably provided for a continuous casting plant, in particular for a continuous casting plant for casting slabs. That is, the mold may be an element or a structural unit of a continuous casting plant.
  • the broad side plates are arranged opposite one another and / or the narrow side plates are arranged opposite one another. Furthermore, it is expedient if the broad side plates are arranged at least substantially parallel to one another and / or the narrow side plates are arranged at least substantially parallel to one another. Furthermore, it is expedient if the narrow side plates are arranged at least substantially perpendicular to the wide side plates.
  • an element can be considered to be substantially perpendicular to another element, if the two elements are arranged at an angle of at least 80 ° and at most 90 ° to each other.
  • one element may be considered to be substantially parallel to another element if the two elements are arranged at an angle of at most 10 ° to each other.
  • the two narrow side plates are at least substantially the same width.
  • the two broad side plates are at least substantially the same width. It makes sense to be understood as wide side plates those plates of the mold, which have a greater width than the narrow side plates.
  • width of the respective plate its greater extent in a sectional plane perpendicular to a longitudinal / casting direction of the mold can be understood.
  • thickness of the respective plate its smaller extent in a sectional plane perpendicular to the longitudinal / casting direction of the mold can be understood.
  • a cross sectional area in a normal plane to the casting direction of the volume enclosed by the wide side plates and narrow side plates may decrease (evenly) from the inflow end to the exit side end of the mold.
  • This rejuvenation of the volume enclosed by the mold is also referred to as "taper".
  • the cross-sectional area can be reduced by a few percent, for example by 1 to 5%, in the casting width direction and / or in the direction of the thickness of the casting.
  • the taper causes the inner surfaces of the mold plates as large as possible rest against the shrinking strand.
  • this taper can be realized by correspondingly reducing the width of the narrow side plates from the inflow-side end to the outlet-side end of the chill, which corresponds to a corresponding reduction of the casting thickness along the height of the chill.
  • the lower ends of the two Narrow side plates are tilted accordingly during the casting operation inward, which corresponds to a reduction of the casting width above the height of the mold.
  • the narrow and / or wide side plates are at least partially made of one or more metals. It is particularly preferred if the narrow and / or wide side plates are at least partially made of copper. Because copper has a high thermal conductivity and therefore is well suited to dissipate heat from a metal located in the mold. Furthermore, the narrow and / or wide side plates may each have one or more coolant guide channels. The narrow and / or wide side plates can therefore be flowed through by a coolant, for example water. In this way, the heat which the narrow and / or wide side plates receive from the metal in the mold, can be effectively removed from the plates.
  • a coolant for example water
  • narrow and / or wide side plates may be coated, in particular with a metallic coating, e.g. of nickel and optionally of other metals, and / or with a ceramic coating.
  • a metallic coating e.g. of nickel and optionally of other metals
  • a ceramic coating can serve inter alia as wear protection.
  • the distance between the narrow side plates is adjustable, it is possible, for example, to set a casting width of the mold. Conveniently, this distance by means of a threaded spindle unit, which one or more Threaded spindles may have, adjustable. Alternatively or additionally, this distance can be adjustable by means of a hydraulic unit, which may have one or more hydraulic cylinders.
  • a contact pressure with which at least one of the wide side plates is printed on the narrow side plates is reduced.
  • the contact pressure is expediently increased again, in particular to its original value.
  • a distance between the wide side plates is adjustable, in particular by replacing the narrow side plates with other narrow side plates with other dimensions. In this way it is e.g. possible to set a casting thickness of the mold.
  • the distance sensor is arranged on the first narrow side plate.
  • the distance sensor can be arranged, inter alia, in the region of a known of the first narrow side plate.
  • the distance sensor is arranged on an outer side of the first narrow side plate.
  • a narrow side plate As an outer side of a narrow side plate that side of the narrow side plate can be understood, which faces away from a casting volume of the mold or an inner side of the narrow side plate, which limits the casting volume on one side, facing away.
  • the outside and the inside are two sides of the mold, which are not adjacent to each other.
  • Under a casting volume in turn can be limited by the narrow and wide side plates volume of the mold be understood, which in particular can be flowed through by a liquid metal or is flowed through during operation of the mold by a liquid metal.
  • the distance sensor can be adjusted by means of a holding device, e.g. by means of a bracket, be attached to the first narrow side plate.
  • the holding device may e.g. be welded to the first narrow side plate and / or screwed.
  • the distance sensor in turn is preferably screwed to the holding device.
  • the distance sensor can also be connected in a different way with the holding device.
  • Such an arrangement of the distance sensor allows, among other things, a low-cost attachment of the distance sensor to the first narrow side plate.
  • a hitherto known mold without a distance sensor
  • the distance sensor is placed in a recess, in particular in a cutout, the first narrow side plate.
  • the distance sensor is a non-contact distance sensor, for example an (electro) magnetic distance sensor.
  • the distance sensor is an inductive sensor, in particular an eddy current sensor.
  • an eddy current sensor it is possible to determine a distance with a high accuracy.
  • eddy current sensors provide signals with high reproducibility.
  • eddy current sensors can be used even under harsh production conditions, such as those found in metallurgical processes, in particular in continuous casting processes, ie, for example, in the case of high humidity, high temperatures and / or heavy contamination.
  • the distance sensor is spaced from the first broadside plate. It is also expedient if the distance sensor is arranged at a distance of at most 6 mm, preferably at most 3 mm, to the first broadside plate.
  • the distance sensor has a measuring range of at most a few millimeters, preferably of at most 3 mm.
  • the distance sensor has a small measuring range.
  • the distance sensor has a resolution in the micrometer range, in particular a resolution of 1 micron.
  • the distance sensor is arranged such that its measuring direction is aligned at least substantially perpendicular to the first broadside plate.
  • the measuring direction can be the direction along which magnetic field lines emerge from or enter the distance sensor.
  • magnetic field lines emerging from the distance sensor are generated by the distance sensor itself.
  • a measuring surface of the distance sensor is aligned at least substantially parallel to the first broadside plate.
  • the measuring surface of the distance sensor can be an end-side, in particular circular surface of the distance sensor, which determines the sensor side, a distance of the distance sensor to a measured object, can be understood.
  • the distance sensor is an inductive sensor, in particular an eddy current sensor
  • the measuring surface may be that surface of the distance sensor through which magnetic field lines exit from or enter the distance sensor. Expediently, the measuring direction of the distance sensor is perpendicular to its measuring surface.
  • the distance sensor is communicatively connected to an evaluation unit, either wired or via a wireless connection.
  • the evaluation unit can be set up to determine the distance between the first narrow side plate and the first wide side plate using the sensor signal.
  • the evaluation unit may be configured, using the sensor signal, another size dependent on the distance between the first narrow side plate and the first wide side plate, such as e.g. to determine a distance between the distance sensor and the first broadside plate.
  • the mold has at least one further distance sensor.
  • This further distance sensor is expediently adapted to generate a distance-dependent sensor signal.
  • the further distance sensor is expediently arranged such that its sensor signal is from a distance between the first narrow side plate and the second wide side plate is dependent. With the aid of the additional distance sensor, it is therefore possible to determine the last-mentioned distance.
  • the further distance sensor can be arranged in particular on the first narrow side plate. It makes sense that the measuring direction of the first-mentioned distance sensor and the measuring direction of the further distance sensor are opposite to each other.
  • a plurality of distance sensors are arranged on both narrow side plates.
  • the distance sensors can be arranged on the respective narrow side plate, inter alia, in at least two sensor rows, in particular rows of sensors parallel to one another. Furthermore, the rows of sensors can be placed on opposite edges and / or opposite sides of the respective narrow side plate. In addition, the sensor rows can be aligned in particular vertically. Using the distance sensors, it is possible to determine their respective distances to the two wide side plates for both narrow side plates.
  • each of the distance sensors is adapted to generate a distance-dependent sensor signal, and is arranged such that its sensor signal is dependent on a distance between one of the narrow side plates and one of the wide side plate.
  • at least eight distance sensors per narrow side plate are provided.
  • four distance sensors per sensor row can be provided.
  • the mold which is monitored in the process according to the invention, may inter alia be the mold according to the invention, in particular one of the above-described developments of the mold according to the invention.
  • the distance between the first narrow side plate and the first wide side plate can be monitored.
  • another size depending on the distance between the first narrow side plate and the first wide side plate such as e.g. a distance between the distance sensor and the first broadside plate to be monitored.
  • the method can thus be carried out in particular in a continuous casting plant, while a metallic strand, for example a steel strand, is cast.
  • the sensor signal is transmitted to an evaluation unit.
  • the evaluation unit can determine the distance between the first narrow side plate and the first wide side plate using the sensor signal.
  • the evaluation unit can determine another variable using the sensor signal, which is dependent on the distance between the first narrow side plate and the first broadside plate.
  • a state of the mold such as the distance between the first narrow side plate and the first broadside plate
  • the monitoring may include logging such a state variable and / or comparing the state variable with a setpoint.
  • the setpoint may be, for example, a distance setpoint.
  • a reference value for a distance variable such as for example the distance between the first narrow-side plate and the first broad-side plate, may be the reference distance value.
  • the fact that foreign material has penetrated between the first narrow side plate and the first wide side plate can be detected, for example, by the fact that the determined distance exceeds a predetermined distance value. In other words, If the determined distance exceeds a predetermined distance value, the evaluation unit can interpret this to mean that foreign material has penetrated between the first narrow side plate and the first wide side plate.
  • the foreign material may be, for example, a material which is liquid before / at the penetration and optionally solidifies after penetration.
  • a plurality of such sensor signals are generated successively by the distance sensor at least during an adjustment process in which the distance between the two narrow side plates is adjusted.
  • the distance between the first narrow side plate and the first wide side plate can be monitored at different times during the adjustment process. Consequently, formation of fins can be detected early.
  • a plurality of such sensor signals are successively generated by the distance sensor during a predetermined time period after the adjustment process and / or during a predetermined time period before the adjustment process.
  • the distance sensor it is possible for the distance sensor to generate a plurality of such sensor signals in continuous succession.
  • the sensor signal may be dependent on a material state, in particular on a local material composition, of the first broadside plate. In such a case, it is possible to determine, based on the sensor signal, which thickness has a coating of the first broadside plate at the point with respect to which the distance of the first broadside plate to the first narrow side plate is determined. In this way it can be determined, for example, how strongly the coating is worn, or how much material has been removed from the coating.
  • the sensor signal is independent of the material state, in particular of the local material composition, of the first broadside plate. It can thereby be achieved that the distance between the first narrow side plate and the first wide side plate, but not the material state of the first wide side plate influences the sensor signal. In such a case, (costly) measures to account for a material dependence of the sensor signal in its evaluation can be dispensed with.
  • a distance-dependent sensor signal is generated by a plurality of distance sensors of the mold. It is preferably determined using these sensor signals which distances the first narrow side plate has to the two wide side plates. Further, it is preferred if it is determined using these sensor signals, which distances the second narrow side plate has to the two wide side plates.
  • the distances is determined whether between at least one of the broad side plates and at least one of the narrow side plates foreign material has penetrated and / or between at least one of the narrow side plates and one of the wide side plates a gap has trained. If necessary, it is determined on the basis of the sensor signals or on the basis of the distances determined from the sensor signals, between which of the narrow side plates and which of the wide side plates foreign material has penetrated and / or between which Narrow side plates and which of the wide side plates has formed a gap.
  • the narrow side plates can be determined using the sensor signals or based on the distances determined from the sensor signals, if at least one of the narrow side plates is tilted relative to at least one of the wide side plates.
  • One of the narrow side plates can then be considered as tilted relative to one of the wide side plates if at least one of the edges of this narrow side plate is aligned neither parallel nor perpendicular to one of the edges of the wide side plate.
  • a sensor signal is generated by a plurality of distance sensors of the mold, on the basis of which a distance value is determined. Furthermore, it is advantageous if the determined distance values are subjected to a plausibility check.
  • the plausibility check may e.g. comprise checking that some or all of the determined distance values satisfy a predetermined condition, for example a mathematical relation.
  • a profile of a coating thickness of the respective broad side plate can be determined on the basis of the determined distance values.
  • FIG. 1 shows a Strangg cordanlange 2 in a schematic representation.
  • the continuous casting plant 2 can be, for example, a plant for casting steel slabs.
  • the continuous casting machine 2 could alternatively be a so-called endless casting plant, also cast-rolled composite plant.
  • the continuous casting plant 2 comprises inter alia a pan 4 with an outlet pipe 6. Furthermore, the continuous casting plant 2 comprises a distribution basin 8 arranged below the pan 4 with a pouring pipe 10 and a stopper 12 arranged in the distribution basin 8.
  • the continuous casting plant 2 comprises a mold 14 with two broad side plates 16 arranged at least substantially parallel to one another. Furthermore, the mold 14 has two at least substantially mutually parallel Narrow side plates, to each of which a plurality of distance sensors are attached (see. FIG. 2 ).
  • the narrow side plates and the distance sensors are shown in the illustration FIG. 1 but not visible. Both the wide side plates 16 and the narrow side plates are made of copper and are also coated with a nickel layer. Further, the wide side plates 16 and the narrow side plates are water cooled.
  • the continuous casting plant 2 comprises a plurality of driven transport rollers 18, a plurality of cooling nozzles 20 for cooling a strand and a follower assembly, not shown in the figures, such as, for example, a flame cutting machine.
  • the continuous casting plant 2 comprises an evaluation unit 22, which is communicatively connected to the aforementioned distance sensors.
  • liquid steel 24 which is introduced via an outlet pipe 6 in the distribution basin 8. From the distribution basin 8, in turn, the liquid steel 24 is introduced via the pouring tube 10 into the mold 14, whereby a mass flow of the steel 24 flowing into the mold 14 is controlled by means of the plug 12.
  • the steel 24 cools at its contact surfaces with the wide side plates 16 and the narrow side plates and solidifies in this case, so that the steel emerges from the mold 14 in the form of a strand 26 with a rectangular cross section.
  • the strand 26 has a solidified shell a few centimeters thick, while much of its cross-section is still liquid.
  • the strand 26 is removed and guided to the aforementioned (not shown figuratively) follower unit, by means of which the strand 26 is cut, for example in the form of slabs and then removed.
  • the strand 26 could be from a (different) follower unit, such as a Roll stand of a cast-rolled composite plant, can be processed directly without first being cut into slabs.
  • the steel 24 is covered with slag, which is to prevent reoxidation of the steel 24 and serves as a lubricant between the solidified shell and the plates of the mold 14.
  • slag is to prevent reoxidation of the steel 24 and serves as a lubricant between the solidified shell and the plates of the mold 14.
  • casting powder is introduced into the mold 14 from above.
  • FIG. 1 In addition, a horizontal sectional plane II-II is shown, which passes through the mold 14.
  • FIG. 2 shows a schematic section through the mold 14 from FIG. 1 along the cutting plane II-II.
  • FIG. 2 shows a schematic section through the mold 14 from FIG. 1 along the cutting plane II-II.
  • the narrow side plates 28 in addition to the aforementioned wide side plates 16 of the mold 14, also their narrow side plates 28 as well as the distance sensors 30 fixed to the narrow side plates 28 are shown.
  • the narrow side plates 28 are arranged at least substantially perpendicular to the wide side plates 16. Together with the broad side plates 16 define the narrow side plates 16 a casting volume 32 of the mold 14, which perpendicular to the plane of the FIG. 2 flows through the steel 24.
  • the distance 36, the narrow side plates 28 to each other, is adjustable by means of threaded spindle units 38.
  • Each of the two narrow side plates 28 is connected to a threaded spindle unit 38, which comprises a plurality of threaded spindles 40 arranged one above the other, wherein by means of the threaded spindles 40 a position and (for setting the so-called tapers) a vertical inclination of the respective narrow side plate 28 can be changed.
  • the latter Tilt is in FIG. 2 not shown.
  • FIG. 2 not shown.
  • each of the two narrow side plates 28 eight distance sensors 30 are fixed, which in two mutually parallel sensor rows of four distance sensors 30 (see. FIG. 4 ) are arranged on the respective narrow side plate 28, wherein the two sensor rows of the distance sensors 30 are placed on opposite edges of the respective narrow side plate 28.
  • a smaller or a larger number of distance sensors 30 can be arranged on the narrow side plates 28.
  • the distance sensors 30 may in particular be arranged equidistant from each other.
  • the distance sensors 30, according to the respective structural requirements be arranged in a different way. In perspective FIG. 2 only one distance sensor 30 can be seen from each sensor row. The remaining distance sensors 30 are perpendicular to the plane of the FIG. 2 arranged in front of or behind.
  • each of the distance sensors 30 on an outer side 42, i. on a side facing away from the casting volume 32, the respective narrow side plate 28 is arranged.
  • each of the distance sensors 30 is attached via an L-shaped bracket 44 to the respective narrow side plate 28 and connected via a cable 46 with the aforementioned evaluation unit 22.
  • the distance sensors 30 are designed as eddy-current sensors and have a measuring range of 3 mm and a resolution of 1 ⁇ m. Furthermore, the distance sensors 30 are spaced from the wide side plates 16, wherein their respective Distance 48 to the nearest broadside plate 16 is approximately 3 mm.
  • Each of the distance sensors 30 generates time-sequential, distance-dependent sensor signals during the continuous casting process described above.
  • the sensor signals of the above-mentioned upper distance sensors 30 are each dependent on a distance between the narrow side plate 28, to which the respective distance sensor 30 is attached, and the upper wide side plate 16 according to the drawing.
  • the sensor signals of the lower distance sensors 30 according to the drawings are each dependent on a distance between the narrow side plate 28, to which the respective distance sensor 30 is fastened, and the lower wide side plate 16, which is shown in the drawing.
  • the sensor signals are transmitted to the evaluation unit 22, which determines, using the sensor signals, which distances each of the two narrow side plates 28 has to the two wide side plates 16. Thus, using the sensor signals, the distances between the narrow side plates 28 and the width side plates 16 are monitored.
  • the distances which are determined on the basis of the sensor signals generated at the same time, are subjected to a plausibility check by the evaluation unit 22.
  • the distance values are compared with each other.
  • a regression line as a function of the sensor positions is formed from the distance values. If one of the distance values deviates from the regression line by a predetermined amount or relative value-which is an indication of a defect of the associated distance sensor 30-an error message is output by the evaluation unit 22.
  • a contact pressure with which the wide side plates 16 are pressed against the narrow side plates 16, reduced. Due to the reduced contact pressure, the liquid steel between the narrow side plates 28 and the wide side plates 16 penetrate and then solidify. Here, 16 fins can form between the narrow side plates 28 and the wide side plates. Likewise, due to the reduced contact pressure, casting powder can penetrate between the narrow side plates 28 and the wide side plates 16, so that one or more gaps can form between the plates 16, 28, which can lead to finning.
  • the evaluation unit 22 determines whether foreign material, in particular steel and / or casting powder, has penetrated between at least one of the narrow side plates 28 and at least one of the broad side plates 16. For this purpose, the evaluation unit 22 compares the regression line formed from the determined distances as a function of the sensor positions with a reference regression line as a function of the sensor positions, wherein the reference regression line is formed from distances previously determined during a calibration measurement using the distance sensors 30. If the regression line shows a significantly different course compared to the reference regression line, in particular a significantly higher average distance of the distance sensors 30 by, e.g. more than 0.5 mm and / or a significantly different slope of e.g. plus or minus 0.5 mm per meter, interpreted the evaluation unit 22 this, as penetration of foreign material.
  • the evaluation unit 22 can also determine whether a gap that has formed between one of the narrow side plates 28 and one of the wide side plates (due to intrusion of foreign material), a gap with (substantially) the same thickness or a wedge-shaped gap. In the case of a (substantially) equally thick gap, the regression line is shifted (essentially) parallel to the reference regression line, while in the case of a wedge-shaped gap, the regression line has a significantly different slope than the reference regression line.
  • predetermined measures can be initiated.
  • a mass flow of the steel can be reduced during a casting process.
  • a renewed spreading of the plates 16, 28 take place in order to inspect the spaces between the plates 16, 28 or to clean them of foreign material.
  • all distance sensors 30 are communicatively connected to a common evaluation unit, namely the aforementioned evaluation unit 22.
  • the distance sensors 30 can be combined into a plurality of groups of a plurality of distance sensors 30.
  • Each of these groups of distance sensors 30 can be communicatively connected to its own evaluation unit, which evaluates its sensor signals.
  • FIG. 2 a portion 50 of the mold 14, the in FIG. 3 shown enlarged, identified in the form of a dashed rectangle. Furthermore is FIG. 2 a sectional plane IV-IV shown, which extends perpendicularly through one of the narrow side plates 28.
  • FIG. 3 shows the in FIG. 2 indicated portion of the mold 14 (see section 50 in FIG. 2 ) in an enlarged view.
  • FIG. 3 It can be seen that a measuring direction 52 of the illustrated distance sensor 30 is aligned at least substantially perpendicular or a measuring surface 54 of the illustrated distance sensor 30 is aligned at least substantially parallel to the (partially) depicted broadside plate 16.
  • the measuring directions of the remaining distance sensors 30 are aligned at least substantially perpendicular to the respective closest wide side plate 16.
  • FIG. 4 shows a section through one of the narrow side plates 28 of the mold 14 along the cutting plane IV-IV FIG. 2 ,
  • FIG. 4 is one of the aforementioned sensor rows 56 recognizable.
  • the illustrated sensor row 56 comprises - as well as the remaining, not shown rows of sensors - four equidistant juxtaposed distance sensors 30th
  • FIG. 5 shows a schematic section through another mold 58 from the same perspective, from which the former mold 14 in FIG. 2 is shown.
  • This other mold 58 differs from the previously described mold 14 in that the two narrow side plates 28 of the other mold 58 for each of the distance sensors 30 have a recess 60, wherein in the recesses 60 each one of the distance sensors 30 is arranged.
  • the recesses 60 are located on the outer sides 42 of the narrow side plates 28 and are formed in the present embodiment as cutouts.
  • this mold 58 can be used, for example, instead of the previously described mold 14 in the continuous casting plant 2.
  • the evaluation unit 22 checks whether at least one of the narrow side plates 28 is tilted relative to at least one of the wide side plates 16 using the sensor signals or the distances determined from the sensor signals. In particular, if the distance sensors 30 each generate a plurality of sensor signals in succession, such a tilt can also be detected during the adjustment process of the narrow side plates 28.
  • FIG. 6 shows - from the same perspective as in FIG. 5 - A portion of the mold 58 from FIG. 5 in a state in which the left narrow side plate 28 of the mold 58 as shown in the drawing is tilted with respect to the wide side plates 16.
  • the present tilting comes about by a rotation of the said narrow side plate 28 about a perpendicular to the plane FIG. 5 aligned axis.
  • FIG. 7 shows - from a lateral perspective - as in FIG. 6 and the two wide side plates 16 of the mold 58.
  • the narrow side plate 28 is also tilted with respect to the wide side plates 16.
  • the present tilting is achieved by a rotation of said narrow side plate 28 about an axis, which parallel to the plane of the FIG. 5 and is aligned parallel to the wide side plates 16.
  • a tilt as in 6 or FIG. 7 can be found in the mold 14 of Figures 1 to 4 in an analogous manner.

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EP15182676.5A 2015-08-27 2015-08-27 Lingotiere et procede destine a la surveillance d'une lingotiere Active EP3135402B1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022058168A1 (fr) 2020-09-18 2022-03-24 Primetals Technologies Austria GmbH Machine de coulée continue et procédé de fonctionnement de la machine de coulée continue

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0101521A1 (fr) * 1982-02-24 1984-02-29 Kawasaki Steel Corporation Procede de commande d'installation de moulage en continu
EP0120338A1 (fr) * 1983-03-16 1984-10-03 Licentia Patent-Verwaltungs-GmbH Procédé pour la détection de l'usure de la paroi de la coquille pendant la coulée continue et pour la détection du décollement de la croûte solidifiée de la barre de la paroi intérieure de la coquille
DE3642302A1 (de) * 1986-12-11 1988-06-23 Wiegard Maschf Gustav Verfahren und einrichtung zum vermessen einer stranggusskokille
JP2008043981A (ja) * 2006-08-17 2008-02-28 Nippon Steel Corp 鋼の連続鋳造方法
JP2009178746A (ja) * 2008-01-31 2009-08-13 Jfe Steel Corp 連続鋳造モールド幅変更方法および装置
WO2009152940A1 (fr) 2008-06-17 2009-12-23 Sms Siemag Ag Dispositif et procédé de détection du risque de rupture d'un barreau de coulée en coulée continue d'acier
WO2012164477A1 (fr) * 2011-05-31 2012-12-06 Sider Sistem S.R.L. Procédé et instrument de commande servant à contrôler une plaque de lingot dans une installation de coulée continue
WO2014155342A1 (fr) * 2013-03-27 2014-10-02 Sider Sistem Engineering Srlcr Instrument de contrôle et procédé de détection de la géométrie intérieure d'une lingotière dans une usine de coulée continue

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0101521A1 (fr) * 1982-02-24 1984-02-29 Kawasaki Steel Corporation Procede de commande d'installation de moulage en continu
EP0120338A1 (fr) * 1983-03-16 1984-10-03 Licentia Patent-Verwaltungs-GmbH Procédé pour la détection de l'usure de la paroi de la coquille pendant la coulée continue et pour la détection du décollement de la croûte solidifiée de la barre de la paroi intérieure de la coquille
DE3642302A1 (de) * 1986-12-11 1988-06-23 Wiegard Maschf Gustav Verfahren und einrichtung zum vermessen einer stranggusskokille
JP2008043981A (ja) * 2006-08-17 2008-02-28 Nippon Steel Corp 鋼の連続鋳造方法
JP2009178746A (ja) * 2008-01-31 2009-08-13 Jfe Steel Corp 連続鋳造モールド幅変更方法および装置
WO2009152940A1 (fr) 2008-06-17 2009-12-23 Sms Siemag Ag Dispositif et procédé de détection du risque de rupture d'un barreau de coulée en coulée continue d'acier
WO2012164477A1 (fr) * 2011-05-31 2012-12-06 Sider Sistem S.R.L. Procédé et instrument de commande servant à contrôler une plaque de lingot dans une installation de coulée continue
WO2014155342A1 (fr) * 2013-03-27 2014-10-02 Sider Sistem Engineering Srlcr Instrument de contrôle et procédé de détection de la géométrie intérieure d'une lingotière dans une usine de coulée continue

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022058168A1 (fr) 2020-09-18 2022-03-24 Primetals Technologies Austria GmbH Machine de coulée continue et procédé de fonctionnement de la machine de coulée continue
AT524482A1 (de) * 2020-09-18 2022-06-15 Primetals Technologies Austria GmbH Stranggießanlage und Verfahren zum Betrieb der Stranggießanlage
AT524482B1 (de) * 2020-09-18 2022-07-15 Primetals Technologies Austria GmbH Stranggießanlage und Verfahren zum Betrieb der Stranggießanlage

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