WO2017071940A1 - Détection de la hauteur du ménisque dans une lingotière - Google Patents

Détection de la hauteur du ménisque dans une lingotière Download PDF

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Publication number
WO2017071940A1
WO2017071940A1 PCT/EP2016/074183 EP2016074183W WO2017071940A1 WO 2017071940 A1 WO2017071940 A1 WO 2017071940A1 EP 2016074183 W EP2016074183 W EP 2016074183W WO 2017071940 A1 WO2017071940 A1 WO 2017071940A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
measuring device
casting
pulse guide
electromagnetic pulses
Prior art date
Application number
PCT/EP2016/074183
Other languages
German (de)
English (en)
Inventor
Franz Hartl
Markus Mairhofer
Andreas ROHRHOFER
Philipp Wieser
Original Assignee
Primetals Technologies Austria GmbH
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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Publication of WO2017071940A1 publication Critical patent/WO2017071940A1/fr

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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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level

Definitions

  • the invention relates to a measuring device and a method for detecting a pouring height of a pouring mirror in a mold of a continuous casting plant.
  • a metallic melt is conveyed from a ladle into a cooled mold, in which the solidification of the melt begins.
  • a strand shell which encloses a still liquid metal core.
  • a continuous casting plant further comprises a so-called distributor, via which the
  • melt is conveyed from the ladle into the mold.
  • the manifold serves as a buffer vessel in which the melt is buffered during a ladle change so as not to interrupt the continuous casting process and to allow continuous casting.
  • the melt usually flows through a
  • the level of the mold can be characterized by a GniteLiteford. Under the pouring mirror is understood here the upper surface of the melt in the mold and below the GniteLiteford.
  • the determination of the Gnitespiegel altar is an essential part of the regulation of the level of a mold.
  • the determination of the Gnitespiegel dam is made difficult by the fact that the melt in the mold usually a
  • Casting powder which serves as a lubricant for better sliding ability of the strand shell on the mold walls, protects the strand surface against oxidation and a uniform heat dissipation. Since the casting mirror is thereby covered by a casting powder layer, the casting level height can not be detected by measuring methods which use lasers or radar sensors.
  • a radiometric level measurement can be applied. An intensity of gamma rays is detected and
  • Gamma-ray source which usually contains cesium or cobalt isotopes, and a detector penetrate the melt in the mold and thereby attenuated.
  • Radiometric level measurement is difficult and also hazardous to maintenance personnel due to the use of radioactive components and also requires special safety areas for the storage of
  • the invention has for its object to provide an improved measuring device and an improved method for detecting a G manadorproof porch in a mold of a continuous casting.
  • the object is achieved according to the invention
  • Measuring device solved by the features of claim 1 and in terms of the method by the features of claim 11.
  • Electromagnetic pulses in the impulse management receiving guided by the pulse guide reflection components of the electromagnetic pulses and determining and evaluating the transit times of the reflection components.
  • the invention is based on the physical effect that an electromagnetic pulse at interfaces at which a wave impedance for the pulse changes abruptly, is partially reflected, so that from the transit time of the reflected portion of the pulse, a distance to the interface can be determined. The determination of
  • the invention uses the physical effect for time domain reflectometric detection of
  • the measuring device according to the invention is for
  • electromagnetic pulses for example
  • Microwave pulses formed. In contrast to
  • the measuring device allows in particular the detection of Gellospiegel way, even if the pouring mirror is covered with casting powder. In contrast to radiometric measurements of the level of the pouring mirror, the measuring device makes it possible for the maintenance personnel to detect the
  • the measuring device is much cheaper and more space-saving than on eddy currents based measuring devices and can therefore be used for relatively small molds.
  • the measuring device can be advantageous both for the
  • the measuring device allows detection of G foolspiegel wayn and G manpulver fürdicken, due to its underlying
  • the measuring device therefore enables a cost-effective, continuous and precise detection of casting levels and casting powder layer thicknesses, which is hardly influenced by the process conditions of continuous casting and can be used for almost all continuous casting plants and mold sizes.
  • the pulse guide comprises at least one insertable into the mold probe, wherein the probe preferably within a thermally shielding protective tube is guided from an electrically insulating material.
  • a measuring device with a probe insertable into the mold allows the detection of levels of casting without having to rebuild or extend the continuous casting plant. Furthermore, it allows a flexible, the respectively to be detected G fauxadorproof friendship wayn customizable arrangement of the probe in the
  • the thermal shielding of the probe in a protective tube protects the probe from the high temperatures in the mold and allows a permanent operation of the measuring device for continuous level measurement in the mold. Furthermore, a worn protection tube can be easily and quickly replaced, for example, during a short time
  • the probe is electrically insulated in the protective tube, wherein the electrical insulation advantageously together with the
  • thermal shielding of the probe by the material of the protective tube takes place.
  • a further embodiment of the invention provides that the pulse guide comprises at least one probe, which is integrated in a projecting into the mold casting tube for filling the mold.
  • This embodiment uses with the pouring tube an already existing component of the continuous casting, in the
  • Melt is immersed in the mold to integrate in it a probe of the pulse guide. This is particularly advantageous when in the mold little space for the
  • Pulse guide is available because no additional equipment must be introduced into the mold.
  • At least one such probe further extends in a direction which deviates from a casting direction of the mold.
  • the pulse guide is thus arranged on the mold wall.
  • the mold itself saves space as the wearer of
  • Pulse guide used.
  • the arrangement of probes in grooves of the mold wall advantageously prevents the probes from affecting the shape of the strand shell of the strand formed in the mold.
  • the embedding of the probes in each case an electrically insulating insulating jacket protects the probes from the high temperatures in the mold.
  • Peel growth of a strand shell in the mold affects, d. H. does not cause any substantial inhomogeneity of the shell growth.
  • a further embodiment of the invention provides that at least one probe is designed as a metallic sensor rod or as a metallic sensor cable.
  • Measuring device can advantageously be realized inexpensively. With sufficient heat shielding of the probes, commercially available sensor rods or sensor cables may also be used.
  • Insulated insulating filling filled groove in an inner side of a mold wall, wherein the groove is preferably in a direction runs from a casting direction of the
  • the mold wall for guiding the electromagnetic pulses.
  • the grooves filled with an insulating filling act as waveguides which are open to the cavity surrounded by the mold wall and into which electromagnetic pulses are respectively coupled.
  • Deviating from the casting direction gradients of the grooves in turn advantageously counteract inhomogeneous shell growth of the strand shell in the mold.
  • a further embodiment of the invention provides that the sensor electronics is connected to the pulse guide by at least one high-frequency line, such as a coaxial cable for transmitting electromagnetic pulses.
  • the high-frequency line makes it possible that the
  • Sensor electronics can be arranged in a protective against the high temperatures in the vicinity of the mold protective distance to the mold.
  • High-frequency line also makes it possible to mount the pulse guide and the sensor electronics to components that perform a relative movement to each other.
  • the mold is placed in an oscillating motion to prevent adhesion of the strand shell to the mold wall. In such a case, by a flexible
  • High-frequency line for example, a fixed to the moving mold associated pulse guide with a
  • time domain reflectometry determined.
  • guided electromagnetic impulses are sent into the mold along the pulse guidance and run times on the casting mirror
  • electromagnetic pulses for example, microwave pulses are used.
  • microwave pulses takes advantage of the fact that such electromagnetic pulses due to their frequencies and wavelengths are particularly well reflected on casting levels of metallic melts.
  • Casting powder height one facing away from the casting mirror
  • G confusepulverober composition a G tellpulver Wein, which is located above the mold level, is determined by time domain reflectometry by electromagnetic impulses guided along the pulse guide are sent into the mold and run times on the G confusepulverober Structure reflected and guided by the pulse guide reflection components of the
  • electromagnetic pulses are detected and evaluated.
  • a further embodiment of the method provides that for calibrating the measuring device, an electromagnetic
  • Pulses at least proportionately reflective calibration is arranged at a defined calibration position in the mold and guided along the pulse guide electromagnetic pulses are sent to the mold.
  • the calibration position of the calibration element in the mold serves as a reference for determining the
  • G tellaptiere Waitn d. H. a G stealapt altar is determined from a distance of the surface of the melt in the mold from the calibration position. This distance is directly proportional to the difference in the running time of an
  • reflected pulse is defined. This allows a simple calibration of the measuring device, which is preferably carried out only once during the commissioning of the measuring device.
  • 1 shows schematically a continuous casting plant with a mold and a first exemplary embodiment of a measuring device for detecting a level of the pouring glass in the mold in a sectional representation
  • 2 shows schematically a mold and a second
  • Embodiment of a measuring device for detecting the G manadorproof way in a mold in a sectional view, 3 shows schematically a pouring tube and a third
  • FIG. 3 shows a longitudinal sectional view
  • FIG. 4 shows the pouring tube shown in FIG. 3 and the measuring device shown in FIG. 3 in a cross-sectional representation
  • FIG. 6 shows a detail of a mold and a
  • Figure 1 shows schematically a continuous casting 1 in a sectional view.
  • the continuous casting plant 1 comprises a
  • Casting ladle 3 a shadow tube 5, a distributor 7, a stopper 9, a pouring tube 11 and a mold 13.
  • melt 23 in the manifold 7 can be conducted. Slag also passes into the distributor 7 with the melt 23. In the distributor 7, a slag layer 25 which is floating on the melt 23 is formed.
  • the distributor 7 has in its distributor base 27 a
  • Distributor outlet 31 is formed. At a lower end of the Verteil Vogelslasses 31, the pouring tube 11 is located, can be conveyed by the melt 23 from the distributor 7 in the mold 13. The plug 9 is above the distributor opening 29
  • Plug 9 is typically shaped conically or with stepped radii, with its diameter to the
  • Distributor opening 29 decreases towards.
  • the distributor opening 29 is closable by the plug end 33
  • Stopper end 33 is retracted into the manifold opening 29 until it rests against the manifold outlet 31.
  • the plug 9 is provided by means of a (shown only schematically)
  • Kokillenauslass 17 of the mold 13 solidify in a casting direction 18 issued strand 19.
  • An upper surface of the melt 23 in the mold 13 forms a pouring mirror 21 in the mold 13.
  • a casting powder is added, which forms a G confusepulver Mrs 37 with a facing away from the casting mirror 21 G confusepulverober Structure 39 above the casting mirror 21 ,
  • the casting powder improves the sliding properties of the strand shell on the mold wall 15 and protects the melt 23 in the mold 13 from oxidation.
  • the level height of the melt 23 in the mold 13 is quantified by a pouring mirror height 41, which is defined as a distance of the pouring mirror 21 from a reference position 43 in the mold 13, for example a position in the region of the mold outlet 17.
  • a pouring mirror height 41 which is defined as a distance of the pouring mirror 21 from a reference position 43 in the mold 13, for example a position in the region of the mold outlet 17.
  • G clothpulverober construction 39 is accordingly by a
  • Cast powder height 45 which is defined as a distance of the casting powder surface 39 from the reference position 43.
  • FIG. 1 also shows a first exemplary embodiment of a measuring device 47 for time domain reflectometry
  • the measuring device 47 comprises a pulse guide 49 for guiding electromagnetic pulses in the mold 13 and connected to the pulse guide 49 by a protected from heat radiation heat-resistant high-frequency line 51, such as a coaxial cable, connected sensor electronics 53rd Die
  • Sensor electronics 53 generates the electromagnetic pulses and couples them via the high-frequency line 51 in the
  • Pulse guide 49 a The electromagnetic pulses are microwave pulses.
  • the pulse guide 49 has an insertable into the mold 13 probe 55, which is designed as a metallic sensor rod or as a metallic sensor cable.
  • the probe 55 is made of a material of high
  • Stainless steel like the stainless steel of the WNr. 1.4841 (Xl5CrNiSi25-21), which has excellent corrosion resistance and can be used in continuous operation in air up to about 1150 ° C, or a suitable heating element alloy such as an alloy of iron, chromium and aluminum with a
  • the probe 55 is analogous to Figure 2 within a thermally shielding (not in Figure 1)
  • the probe 55 is protected from the high temperatures prevailing in the mold 13.
  • the probe 55 may further be lapped with a cooling medium, for example with an inertizing gas, which acts as additional thermal insulation.
  • the preferably detachable high-frequency line 51 makes it possible for the sensor electronics 53 to be arranged in a distance from the mold 13 which protects them from the high temperatures in the vicinity of the mold 13.
  • a flexibly running high-frequency line 51 also allows the pulse guide 49 and the sensor electronics 53 at
  • the mold 13 is set into an oscillating motion by means of an oscillator in order to adhere the strand shell to the mold wall 15
  • High-frequency line 51 for example, a fixedly connected to the moving mold 13 pulse guide 49 are connected to a sensor electronics 53, which is not at one with the mold 13 mitbedorfden component of the continuous casting 1 is arranged.
  • Pulse guide 49 moves with the mold 13, the Kokillendoch digital, for example by a
  • the electromagnetic pulses generated by the sensor electronics 53 are guided along the probe 55 introduced into the mold 13. A along the probe 55 to the
  • Kokillenauslass 17 propagating electromagnetic pulse is in each case partially reflected on the G devispulverober Structure 39 and the casting mirror 21.
  • the reflection components of the pulse are along the probe 55 and through the
  • High-frequency line 51 led back to the sensor electronics 53 and detected by the sensor electronics 53. With the sensor electronics 53, the terms of this
  • the G tellpulverober Structure 39 reflected reflection component the G collectpulveriere 45 is determined. From the transit time of the reflecting portion reflected on the casting mirror 21, the casting-mirror height 41 is determined. The difference of
  • Casting powder height 45 and the pouring mirror height 41 further provides the thickness of the casting powder layer 3.
  • Calibration element which reflects electromagnetic pulses at least partially, at a calibration position 46 in the mold 13, for example at or in the region of an upper edge of the mold 13, which by a mold height 48 of
  • Mold 13 is defined, arranged. Further, 49 guided electromagnetic pulses are sent along the impulse guide in the mold 13 and the sensor electronics 53 is a transit time reflected at the calibration and guided by the pulse guide 49 reflection components of detected electromagnetic pulses. The determined transit time is determined as a reference value corresponding to the calibration position 46 for the determination of casting level heights 41 and optionally of casting powder heights 45 from running times on the
  • the calibration element is for example as a sheet
  • Measuring device 47 needs only once in the
  • Figure 2 shows schematically a mold 13 and a second embodiment of a measuring device 47 for detecting the G easilyador too 41 in a mold 13 in one
  • the measuring device 47 is designed similar to the embodiment shown in Figure 1 and comprises an insertable into the mold 13 pulse guide 49 for guiding electromagnetic pulses in the mold 13 and a
  • the pulse guide 49 has a probe 55 which can be introduced into the mold 13 and which, like the one shown in FIG.
  • Embodiment is designed as a metallic sensor rod or as a metallic sensor cable.
  • the introduced into the mold 13 portion of the probe 55 is guided within a thermally shielding the probe 55 protective tube 57 made of an electrically insulating material, such as a refractory material. Also in this
  • the probe 55 in the protective tube 57 with a cooling medium for example with a Inertizing, lapped, that as an additional
  • Embodiment are the sensor electronics 53 and the
  • Probe 55 is not interconnected by a high frequency line 51, but the probe 55 is directly connected to the
  • Protective tube 57 led out portion of the probe 55 bent and connected to the sensor electronics 53, so that the sensor electronics 53 in a before the high
  • Figures 3 and 4 show schematically a pouring tube 11 and a third embodiment of a measuring device 47 for detecting a G manadorproof Shaw 41 in a mold 13.
  • Figure 3 shows a longitudinal sectional view
  • Figure 4 shows a cross-sectional view of the pouring tube 11 and
  • the measuring device 47 comprises like that in FIG. 1
  • a pulse guide 49 for guiding electromagnetic pulses and a
  • the pulse guide 49 has a probe 55 which, as in the exemplary embodiment shown in Figure 1 as a
  • the probe 55 is within one of
  • Probe 55 thermally shielding protective jacket 59 made of an electrically insulating material, such as a refractory material.
  • the protective jacket 59 is fixed or releasably connected to the pouring tube 11 and extends on an outer side of the pouring tube 11 parallel to a
  • a releasable connection has the advantage that in the phase of heating the pouring tube 11 or distributor 7, the pulse guide 49 is not thermally stressed when the protective jacket 59 is attached to the already heated pouring tube 11, z. B. with a quick-closing clamp.
  • the embodiment shown in Figures 3 and 4 has the advantage that no additional equipment in the
  • Mold 13 must be introduced, but the casting tube 11, which in any case protrudes into the mold 13, is used as a holder for the pulse guide 49. This design is thus especially for very tight spaces
  • Casting tube 11 is fixedly arranged on the distributor outlet 31 (see FIG. 1) and thus the relative movement of a
  • the pulse guide 49 is as in the embodiment shown in Figure 1 by a protected from heat radiation heat-resistant high-frequency line 51 with the
  • Sensor electronics 53 connected to transmit electromagnetic pulses between the sensor electronics 53 and the pulse guide 49, so that the sensor electronics 53 can be arranged in a protective against the high temperatures in the vicinity of the mold 13 distance to the mold 13.
  • the probe 55 may be in the protective jacket 59 with a
  • FIG. 5 shows a mold 13 and a pulse guide 49 of a fourth exemplary embodiment of a measuring device 47 for detecting a casting level 41 in the mold 13 in a cross-sectional view with a direction of casting 18
  • the measuring device 47 comprises, as the embodiment shown in Figure 1 a
  • Pulse guide 49 for guiding electromagnetic pulses and not shown in Figure 5 sensor electronics 53 for generating the electromagnetic pulses, coupling the electromagnetic pulses in the pulse guide 49,
  • the pulse guide 49 has a probe 55 which, as in the one shown in FIG.
  • Embodiment is designed as a metallic sensor rod or as a metallic sensor cable.
  • the pulse guide 49 is not as in the embodiments shown in Figures 1 or 2 as
  • pulse guide 49 is formed or integrated as in the embodiment shown in Figures 3 and 4 in the pouring tube 11, but is designed as a probe 55 which on an inner side of the mold wall 15 of the mold 13 in a groove 63 is disposed in the mold wall 15 and surrounded within the groove 63 by an electrically insulating insulating jacket 61.
  • the pulse guide 49 fills the groove 63 completely.
  • the impulse guide 49 does not need to be separately inserted into the mold 13 as in FIGS. 1 or 2, since it is arranged in the mold wall 15.
  • the groove 63 and the pulse guide 49 arranged therein extend from an upper edge of the mold wall 15 onto the mold outlet 17 to a depth which is sufficient for determining the mold level heights 41 to be detected.
  • the groove 63 extends in a direction deviating from the casting direction 18 in a manner analogous to FIG
  • the insulating jacket 61 is preferably made of a material whose thermal conductivity is similar to the thermal conductivity of the mold wall 15, for example, a
  • Ceramic material with a high thermal conductivity In order to allow a good heat transfer between the insulating jacket 61 and the mold wall 15, can between the
  • Insulation jacket 61 and the mold wall 15 further be a connecting material, such as a thermal grease, be arranged.
  • the probe 55 is connected to the sensor electronics 53, for example via a high-frequency line 51 as in Figure 1 or 3, or directly as in Figure 2, in that the probe 55 protrudes from the mold wall 15 and with the
  • the groove 63 of the embodiment shown in Figure 5 has a rectangular, surrounded by the mold wall 15 cavity in the mold 13 open cross-section.
  • FIG. 6 shows a section of a mold 13 and a pulse guide 49 of a fifth exemplary embodiment of a measuring device 47 for detecting a casting level 41 in the mold 13 in a manner analogous to FIG
  • Embodiment only in that the groove 63 in the mold wall 15 is not rectangular, but a Trapezoidal cross-section, wherein the groove bottom of the groove 63 has a greater extent than the groove opening of the groove 63. This advantageously allows a positive fit
  • Figures 7 and 8 show a mold 13 and a
  • Figure 7 shows a similar to Figure 5 cross-sectional view with a direction of casting 18th
  • FIG. 8 shows a section of an inner side of a mold wall 15 of the mold 13 and an impulse guide 49 of the mold arranged thereon
  • the measuring device 47 is similar to the measuring device 47 of the imple mentation example shown in Figure 5
  • the use of a plurality of probes 55 makes it possible to measure a casting level profile in addition to a casting level 41. Furthermore, it allows out with the various probes 55
  • Mold level control is used.
  • a spatial distribution of the G manuverieren 41 be closed to unbalanced flows in the melt 23 and thereby z.
  • an asymmetrical outflow of melt 23 can be detected from the pouring tube 11.
  • the grooves 63 extend from an upper edge of the
  • the grooves 63 each extend as in
  • FIG. 8 shows a direction deviating from the casting direction 18 in order to prevent inhomogeneous shell growth
  • the measuring device 47 includes the pulse guide 49 for guiding electromagnetic pulses and not shown in Figure 5 sensor electronics 53 for generating the electromagnetic pulses, coupling the electromagnetic pulses in the pulse guide 49,
  • the pulse guide 49 of this embodiment unlike that shown in Figs.
  • Embodiments not designed as a sensor rod or sensor cable probe 55, but instead filled with an electrically insulating insulating filling 65 groove 63 in an inner side of a metallic mold wall 15 of Mold 13.
  • the electromagnetic pulses are coupled directly into the groove 63 in this embodiment and guided along the groove 63.
  • Insulating filling 65 acts as to the cavity surrounded by the mold wall 15 open waveguide for guiding the electromagnetic pulses.
  • the groove 63 is connected to the
  • Sensor electronics 53 for example via a
  • Radio frequency line 51 connected to transmit electromagnetic pulses.
  • the groove 63 extends from an upper edge of
  • the groove 63 preferably extends in a direction deviating from the casting direction 18, analogously to FIG. 7, in order to prevent inhomogeneous shell growth
  • the insulating filling 65 is preferably made of a material having a high thermal conductivity.
  • Powdersheets 45 determined.
  • Figure 10 shows a mold 13 and a pulse guide 49 of an eighth embodiment of a measuring device 47 for detecting a G stealador basically too 41 in the mold 13 in a cross-sectional view with a direction of casting 18 orthogonal cutting plane.
  • the measuring device 47 is similar to the measuring device 47 of the imple mentation example shown in Figure 9
  • Pulse guide 49 with several, each filled with an electrically insulating insulating filling 65 grooves 63 in an inner side of a metallic mold wall 15 of the mold 13. Each of these grooves 63 is connected to a sensor electronics 53, not shown in FIG. 10, of the measuring device 47. Along each of these grooves 63 guided electromagnetic pulses are sent to her in the mold 13, with which time-domain reflectometrically each G stealador basically lets 41 and optionally a G discernpulver awhile 45 are determined.
  • the grooves 63 extend from an upper edge of the
  • Mold wall 15 on the Kokillenauslass 17 to a depth sufficient to determine to be detected G cordadorproof wayn 41.
  • the grooves 63 each extend analogously to FIG. 8 in a direction deviating from the casting direction 18
  • the grooves 63 of the embodiments shown in Figures 7, 9 and 10 each have a rectangular
  • Modifications of these exemplary embodiments may have grooves 63 of a different cross section, for example grooves 63, each having a trapezoidal cross section as the groove 63 shown in Figure 6.
  • FIGS. 1 and 2 show, by way of example, straight dies 13 and FIGS. 5, 7, 9 and 10 show
  • Example molds 13 with rectangular mold openings are not limited to such molds 13 formed, but also for all other Kokillenformen, for example, for curved molds 13 and / or molds 13 with differently shaped mold openings used.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Continuous Casting (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

L'invention concerne un dispositif de mesure (47) destiné à la détection de la hauteur (41) d'un ménisque (21) dans une lingotière (13) d'une installation de coulée continue (1). Le dispositif de mesure (47) comprend un guide d'impulsion (49) permettant d'acheminer les impulsions électromagnétiques jusque dans la coquille (13), et un dispositif électronique (53) relié au guide d'impulsions (49) et destiné à la génération des impulsions électromagnétiques, à l'injection des impulsions électromagnétiques dans le guide d'impulsions (49), à la réception des composantes de réflexion des impulsions électromagnétiques, composantes acheminées par le guide d'impulsions (49), et à la détermination et l'évaluation des temps de propagation des composantes de réflexion, le guide d'impulsions (49) comportant au moins une sonde (55) apte à être plongée dans la lingotière (13).
PCT/EP2016/074183 2015-10-28 2016-10-10 Détection de la hauteur du ménisque dans une lingotière WO2017071940A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50911/2015A AT517889B1 (de) 2015-10-28 2015-10-28 Erfassung einer Gießspiegelhöhe in einer Kokille
ATA50911/2015 2015-10-28

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WO2017071940A1 true WO2017071940A1 (fr) 2017-05-04

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