EP2560774A1 - ANORDNUNG UND VERFAHREN ZUR STEUERUNG EINER GIEßPULVERAUFGABE EINER STRANGGIEßANLAGE - Google Patents
ANORDNUNG UND VERFAHREN ZUR STEUERUNG EINER GIEßPULVERAUFGABE EINER STRANGGIEßANLAGEInfo
- Publication number
- EP2560774A1 EP2560774A1 EP11712212A EP11712212A EP2560774A1 EP 2560774 A1 EP2560774 A1 EP 2560774A1 EP 11712212 A EP11712212 A EP 11712212A EP 11712212 A EP11712212 A EP 11712212A EP 2560774 A1 EP2560774 A1 EP 2560774A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring device
- continuous casting
- signal
- casting powder
- arrangement according
- 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
Links
Classifications
-
- 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
-
- 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
- B22D11/108—Feeding additives, powders, or the like
-
- 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
- B22D11/111—Treating the molten metal by using protecting powders
-
- 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
- B22D11/165—Controlling or regulating processes or operations for the supply of casting powder
-
- 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
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
Definitions
- the invention relates to an arrangement and a method for controlling the G confusepulveraufgabe a continuous casting.
- the casting powder consisting of ground oxidic and carbonate materials has the task of avoiding unnecessary heat radiation, preventing reoxidation, ensuring lubrication between the cooled mold wall and the strand shell and binding oxidic inclusions.
- DE 34 00 896 A1 discloses an arrangement for controlling the application of casting powder to the bath surface in the mold of a continuous casting plant, which device comprises a transmitting device for emitting light of specified intensity, which is directed onto the bath surface, a receiving device for receiving of the light reflected on the surface of the bath and for converting the received light into an electrical signal and an intensity checking circuit connected to the output of the receiving means and providing a signal dependent on the intensity of the received light used to control the casting powder application or casting powder application is used .
- this control arrangement has a complex and expensive construction.
- this type of control can easily lead to a faulty control of G manpulveraufgabe.
- the invention is therefore based on the object to provide an arrangement and a method for controlling a G manpulveraufgabe achieved a continuous casting available, which is characterized by improved accuracy.
- the arrangement according to the invention for controlling a casting powder application or a casting powder application device on a continuous casting plant has a first te measuring device for determining the height of a bath level in a continuous casting mold and generating a corresponding first signal, a second measuring device for determining the temperature of the casting powder on the surface of the bath level in the continuous casting mold and generating a corresponding second signal, and one of the first signal and the second Signal evaluating computer unit and a casting powder application device controlling computer unit.
- the first measuring device for measuring the level of the bath level is preferably designed in the form of a Berthold measuring device and arranged on the continuous casting mold.
- the arrangement according to the invention is characterized in that two different, measured signals are used to control the casting powder application.
- a particularly accurate control of G stealpulveraufgabe is possible, with fault tolerances can be largely avoided.
- To control the casting powder task both the measured height of the bath level in the continuous casting mold and the measured temperature of the casting powder on the surface of the bath level are used. These two measured signals are evaluated together in a common computer unit, wherein from these two signals, the delivery rate of the casting powder to be abandoned and the position at which the G confusepulverillergabe should take place on the bath surface, and is passed to the G confusepulveretzgabe interference.
- the second measuring device If too high temperatures are measured by means of the second measuring device, for example if the casting powder has melted on the bath mirror surface, a signal "too hot” is generated If too low temperatures are measured, for example if the casting powder layer on the bath mirror surface is too thick, becomes Signal “too cold” generated.
- the casting powder dispensing is preferably carried out at periodic intervals, although it can be adapted or appropriately controlled in accordance with the values determined by the computer unit. If the casting powder dispensing device receives the signal "too hot" from the computer unit, casting powder is preferably immediately fed to the continuous casting mold.
- the second measuring device is preferably designed in the form of an optical image evaluation unit.
- the optical image evaluation unit By means of the optical image evaluation unit, a direct, non-contact determination of the state of the casting powder on the surface of the bath level, in particular the temperature of this casting powder, is possible during the entire melting process or casting process.
- the optical image evaluation unit registers the state of the casting powder on the bath mirror surface during the entire time course, so that it is always possible to fall back on specific sequences and any number of measuring points for the state of the casting powder can be generated. Access to the determined data is possible at any time, so that, if appropriate, the evaluation method can be adapted or varied accordingly. Furthermore, moving images over the time of the entire melting process or casting process can clearly illustrate the process in the continuous casting mold.
- the continuous casting mold is preferably in its upper region with Markings provided, which can be illuminated with a light source and clearly with the optical image evaluation unit, in particular with the image acquisition and their evaluation unit of the optical image evaluation unit, can be detected.
- the second measuring device designed as an optical image evaluation unit preferably has a thermal imaging camera and a deflecting device for deflecting the thermal radiation emitted by the casting powder arranged on the surface of the bath mirror in the direction of the thermal imaging camera.
- a thermal imaging camera also called thermography camera
- infrared radiation can be received.
- the thermal imaging camera the invisible to the human eye heat radiation of the arranged on the surface of the bath level casting powder can be made visible. As a result, temperature distributions can be detected and displayed over the entire surface of the casting powder arranged on the bath surface.
- the thermal imaging camera is arranged at a certain distance from the casting powder to be measured, wherein the heat radiation emitted by the casting powder is directed via a deflection device in the direction of the thermal imaging camera.
- the thermal imaging camera can be arranged as protected as possible against the influence of the direct and total heat radiation of the continuous casting mold and the melt bath contained therein.
- the deflecting device is preferably arranged on a side of the immersion tube inserted into the continuous casting mold opposite the casting powder dispensing device or on the same side as the casting powder dispensing device. If the deflection device is located on the side of the immersion tube inserted into the continuous casting mold opposite the casting powder dispensing device arranged, it is possible to minimize the influence of the deflection at an addition or task of casting powder on the G confusepulveraufgabe worn in the continuous casting mold can.
- the deflection device has a first deflection unit and a second deflection unit, wherein the first deflection unit and the second deflection unit are each arranged on opposite sides of a dip tube inserted into the continuous casting mold.
- the deflection device preferably has a reflection system.
- a reflection system as a deflection device, a particularly simple and cost-effective deflection device can be provided.
- the reflection system can be formed, for example, from one or more mirrors which receive the heat radiation from the casting powder on the bath mirror surface and which are aligned in such a way that they reflect the received heat radiation in the direction of the thermal imaging camera.
- the reflection system preferably has a reflectance of about 100%.
- the deflecting device comprises optical waveguides. By using optical waveguides, a particularly high transmission rate of infrared radiation toward the thermal imaging camera is possible, wherein losses in the transmission of the thermal radiation emitted by the casting powder on the bath mirror surface to the thermal imaging camera can be largely prevented.
- the deflection device is preferably arranged in a housing, wherein the housing has an air supply. Through the air supply, a continuous flow of air can be ensured within the housing. Air can be directed in the direction of the deflection device via the air feed, wherein the deflection device can be cooled by the air circulating in the housing. As a result, the life of the deflection device and thus of the optical image evaluation unit can be increased.
- the second measuring device has a dust protection device.
- the addition of casting powder into the continuous casting mold usually results in a strong formation of dust.
- the dust protection device it is possible to prevent the dust from penetrating into the second measuring device, which would lead to contamination of the components provided in the measuring device, such as the thermal imaging camera and the deflection device, as a result of which the measurement results could be falsified.
- the dust protection device may preferably have one or more air-blocking nozzles. Compressed air may preferably be blown across the air-blocking nozzles transversely to the direction in which the dust of the supplied casting powder rises. This can prevent that the dust can penetrate into the housing of the second measuring device. In order to reduce the compressed air consumption, it can be provided in such a way that only during the addition of the casting powder into the continuous casting mold an increased air flow in the form of compressed air is blown out via the air blocking nozzles.
- the dust protection device has a closable opening on the housing of the second measuring device.
- the deflection device is preferably provided in the region of the closable opening, wherein during the measurement of the temperature of the casting powder on the BadLiteober Assembly when no G tellpulverzugabe takes place, the opening is open, so that the heat radiation can be absorbed by the deflection and forwarded.
- the opening can be closed, for example, with a flap, so that the housing is closed during the addition of the powder and no dust can penetrate into the housing.
- the opening can be opened again so that the measurement can be continued.
- the invention further relates to a method for controlling a G stealpulveraufgabe on a continuous casting, wherein by means of a first measuring device determines the height of a bath level in a continuous casting mold and a corresponding first signal is generated and in which by means of a second measuring device, the temperature of the on the surface of the bath in the continuous casting mold arranged casting powder is determined and a corresponding second signal is generated, wherein the first signal of the first measuring device and the second signal of the second measuring device are sent to a computer unit which evaluates the signals and generated from the evaluated signals information to a G confusepulveraufga- sends direction.
- 1 b is a schematic representation of the arrangement according to the invention for controlling a casting powder application of a continuous casting plant according to a second embodiment
- FIG. 1 a schematic plan view of a second measuring device according to the invention of the inventive arrangement for controlling a G manpulveraufgabe a continuous casting;
- Fig. 1 a and 1 b show schematically two different embodiments of an arrangement according to the invention for controlling a casting powder application 10 of a continuous casting plant with a first measuring device, not shown here, for determining the height of a bath mirror 12 in a continuous casting mold 14 and a second measuring device 1 6 Determining the temperature of the casting powder 18 on the surface of the bath level 12 in the continuous casting mold 14.
- a casting powder dispensing device 28 is controlled in a controlled manner and h, in particular, the casting powder task or Casting powder 1 0 on the surface of the bath mirror 12 of the Schmelzba- 22 driven.
- the first measuring device for determining the height of the bath mirror 1 2 is preferably disposed within or on the continuous casting mold 14, wherein the first measuring device is designed for example in the form of a Berthold measuring device.
- the second measuring device 16 is embodied in the form of an optical image evaluation unit, which comprises a thermal imaging camera 24 and a deflection device 26 in the form of a reflection system formed by a mirror system.
- an optical image evaluation unit which comprises a thermal imaging camera 24 and a deflection device 26 in the form of a reflection system formed by a mirror system.
- the deflection device 26 can, as shown in FIG. 1 a, can be arranged in an area above the continuous casting mold 14, which is furthest away from the region where the casting powder application 1 0 takes place, so that the deflection device 26 viewed from the casting powder dispensing device 28 is behind a dip tube inserted into the continuous casting mold 14 20 is arranged. Accordingly, the deflection device 26 is preferably arranged on a casting powder dispensing device 28 opposite side of the continuous casting mold 14. Depending on the installation conditions, it may also be useful, how in Fig. 1 b, the deflection device 26 is provided in front of the dip tube 20, on the same side as the casting powder dispensing device 28. The deflection device 26 is provided above the G cumpulveraufgabe listening 28.
- the deflection device 26 is arranged in a housing 30 which directly adjoins the thermal imaging camera 24.
- the housing 30 has an air feed 32, via which air can be introduced into the housing 30, so that an air circulation is provided in the housing 30, which can bring about cooling of the deflection device 26.
- the second measuring device 16 has a dust protection device, not shown here, which may be one or more air-blocking nozzles, for example or a closable opening provided on the housing 30 may be formed.
- a first signal indicative of the height of the bath level 1 2 is generated by the first measuring device and sent to a computer unit 36.
- the second measuring device 12 is a second, the temperature of the casting powder 18 on the surface of Badspie- gels 12 indicating signal generated and also sent to the computer unit 36.
- the computer unit 36 evaluates the first signal and the second signal and generates from these two signals information or a plurality of information about the required delivery rate of the casting powder dispensing device 28 to the casting mold 14 discontinued casting powder 1 8 and the position at which the G confusepulveraufgabe 29 is to take place on the surface of the bath mirror 1 2, which is passed to the G confusepulveraufgabe listening 28 / will be.
- the temporal casting powder application and the amount of casting powder are optimized and stored in accordance with the type of steel used and the casting speed.
- the casting powder dispensing device 28 can start with the optimized values, as a result of which the entire control process of the casting powder application 10 can be further optimized.
- the casting powder application 10 preferably takes place at periodic intervals, although it can be adapted or appropriately controlled in accordance with the values determined by the computer unit 36. Characterized in that in the inventive arrangement, the measured data with respect to the height of the bath mirror 12 and with respect to the temperature of the casting powder 1 8 on the surface of the bath mirror 12 by the computer unit 36 in relation to each other and generated from these two data instructions to the G confusepulveraufgabe coupled 28 the control of the casting powder task 10 are compared to previously known controls significantly optimized.
- FIG. 2 shows a plan view of the second measuring device 16 according to the invention with the thermal imaging camera 24 and the deflecting device 26 arranged in the housing 30, wherein it can be seen that the deflecting device 26 has a first deflecting unit 38 and a second deflecting unit 40, wherein the first deflecting unit 38 and the second deflection unit 40 are each arranged on opposite sides of the inserted into the continuous casting mold 14 dip tube 20.
- the deflection units 38, 40 of the deflection device 26 can be arranged behind the dip tube 20, as shown in Fig. 1 a, or in front of the dip tube 20, as shown in Fig. 1 b, arranged.
- FIGS. 3 and 4 show two possible variants of a control of the casting powder feed 10 of the casting powder dispensing device 28 by means of a respective flow chart in the form of a block diagram.
- the control of the G confusepulveraufgabe 10 can be done by varying the time interval .DELTA. ⁇ between the task cycles with constant G manpulvermenge m, as shown schematically in Fig. 3, or by varying the amount m of the discontinued casting powder at constant duty cycles, as shown schematically in Fig. 4.
- the G confusepulveraufgabe 10 preferably takes place only when the height H of the bath level between the positions of the maximum allowable BadLiteière Hold H m ax and the minimum allowable BadLitesburg H min . If this is the case, as shown in FIG. 3, the temperature T of the bath level is determined in a next step.
- this temperature T of the bath level is greater than the maximum permissible temperature T max of the bath level, there is a signal that a casting powder application should take place, wherein the time interval ⁇ for the periodic casting powder application is reduced by a change ⁇ of the time interval ⁇ . As soon as the time interval ⁇ is too small, ie smaller than the minimum permissible time interval ⁇ , ⁇ , a message is issued.
- the time interval ⁇ for the periodic casting powder application is increased by ⁇ . If the time interval ⁇ exceeds the maximum permissible time interval AZ max , a message again occurs.
- the height H of the bath level is first checked again. In the regulation of the amount of casting powder, as shown in FIG. 4, the height H of the bath level is also first determined. If the height H of the bath level lies between the maximum permissible bath level height H max and the minimum permissible bath level height H min , the temperature T of the bath level is determined in a next step.
- the amount of casting powder m is reduced. If the amount of casting powder falls below the minimum permissible quantity of casting powder nn, then again a message is issued.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010015670A DE102010015670A1 (de) | 2010-04-21 | 2010-04-21 | Anordnung und Verfahren zur Steuerung einer Gießpulveraufgabe einer Stranggießanlage |
| PCT/EP2011/054409 WO2011131442A1 (de) | 2010-04-21 | 2011-03-23 | ANORDNUNG UND VERFAHREN ZUR STEUERUNG EINER GIEßPULVERAUFGABE EINER STRANGGIEßANLAGE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2560774A1 true EP2560774A1 (de) | 2013-02-27 |
| EP2560774B1 EP2560774B1 (de) | 2016-06-01 |
Family
ID=43982394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11712212.7A Active EP2560774B1 (de) | 2010-04-21 | 2011-03-23 | ANORDNUNG UND VERFAHREN ZUR STEUERUNG EINER GIEßPULVERAUFGABE EINER STRANGGIEßANLAGE |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2560774B1 (de) |
| DE (1) | DE102010015670A1 (de) |
| WO (1) | WO2011131442A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024260575A1 (en) | 2023-06-21 | 2024-12-26 | Ergolines Lab S.R.L. | Detection method and vision device and powder supply system for casting machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT521924B1 (de) | 2018-11-21 | 2021-03-15 | Primetals Technologies Austria GmbH | Dickenmessung einer Schicht eines Gieß- oder Abdeckpulvers in einer Kokille |
| CN109894588B (zh) * | 2019-04-18 | 2021-06-22 | 洛阳市科丰冶金新材料(集团)有限公司 | 一种全无头高效连铸esp低碳钢专用保护渣及其制备方法 |
| CN110605363A (zh) * | 2019-10-31 | 2019-12-24 | 王禹博 | 一种结晶器自动加渣机 |
| CN115406259B (zh) * | 2022-07-12 | 2025-09-05 | 河南佰利联新材料有限公司 | 一种用于钛渣炉炉底温度控制的加料方法 |
| IT202300012816A1 (it) * | 2023-06-21 | 2024-12-21 | Ergolines Lab S R L | Metodo di rilevamento e dispositivo di visione e sistema di adduzione di polvere per macchina di colata |
| CN119772124B (zh) * | 2025-03-11 | 2025-05-27 | 铜陵兢强电子科技股份有限公司 | 一种铝杆连铸连轧精炼工艺及装置 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3400896C2 (de) | 1984-01-12 | 1987-03-19 | Endress U. Hauser Gmbh U. Co, 7867 Maulburg | Anordnung zur Steuerung des Aufbringens von Gießpulver auf die Badoberfläche in der Kokille einer Stranggießanlage |
| JPS62252648A (ja) * | 1986-04-24 | 1987-11-04 | Nippon Kokan Kk <Nkk> | モ−ルドパウダ−厚測定方法 |
| JPS62270263A (ja) * | 1986-05-20 | 1987-11-24 | Mitsubishi Heavy Ind Ltd | 連続鋳造機におけるパウダ−投入量制御装置 |
| JPH0976050A (ja) * | 1995-09-13 | 1997-03-25 | Sumitomo Metal Ind Ltd | モールドパウダー厚の制御方法および装置 |
| JP2002137049A (ja) * | 2000-10-31 | 2002-05-14 | Yokogawa Electric Corp | 連続鋳造機の液面監視装置 |
| US20020139507A1 (en) * | 2001-03-29 | 2002-10-03 | Stollberg Inc. | Method and apparatus for controlling the flow of granular mold flux onto the top of a strand of steel being cast within a continuous casting mold |
-
2010
- 2010-04-21 DE DE102010015670A patent/DE102010015670A1/de not_active Withdrawn
-
2011
- 2011-03-23 WO PCT/EP2011/054409 patent/WO2011131442A1/de not_active Ceased
- 2011-03-23 EP EP11712212.7A patent/EP2560774B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011131442A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024260575A1 (en) | 2023-06-21 | 2024-12-26 | Ergolines Lab S.R.L. | Detection method and vision device and powder supply system for casting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010015670A1 (de) | 2011-10-27 |
| EP2560774B1 (de) | 2016-06-01 |
| WO2011131442A1 (de) | 2011-10-27 |
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