CA2793913A1 - Device and method for closing an outflow opening of a metallurgical vessel - Google Patents
Device and method for closing an outflow opening of a metallurgical vessel Download PDFInfo
- Publication number
- CA2793913A1 CA2793913A1 CA2793913A CA2793913A CA2793913A1 CA 2793913 A1 CA2793913 A1 CA 2793913A1 CA 2793913 A CA2793913 A CA 2793913A CA 2793913 A CA2793913 A CA 2793913A CA 2793913 A1 CA2793913 A1 CA 2793913A1
- Authority
- CA
- Canada
- Prior art keywords
- outflow opening
- plug rod
- sensor
- vessel
- melt
- 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.)
- Abandoned
Links
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/20—Stopper-rod operating equipment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
The invention relates to a device (200) and a method for closing an outflow opening (120) of a metallurgical vessel (110). The device comprises a stopper rod (205), which is arranged in the vessel above the outflow opening (120) for closing the outflow opening (120), a stopper rod mechanism (210) for raising and lowering the stopper rod (205) and a sensor (220) for sensing oscillations of the stopper rod (205) or the stopper rod mechanism (210). To detect the point in time for closing the outflow opening of the metallurgical vessel at as early a time as possible and to achieve an optimum separation between molten material and slag, the device (200) has a controller (230) for activating the closing means for the outflow opening (120) of the vessel depending on the factor of the oscillations at the stopper rod (205) or at the stopper rod mechanism (210) that are sensed by the sensor (220).
Description
Device and method for closing an outflow opening of a metallurgical vessel The invention relates to a device and a method for closing an outflow opening in a metallurgical vessel.
In continuous casting plants the process of pouring liquid steel takes place by way of pouring ladles, tundishes (distributor gutters) in oscillating moulds with a downstream strip guide system. The targeted maximum emptying of the intermediate container /
distributor gutters takes place with consideration of the instantaneous casting speed, the instantaneous distributor weight and the experience of the casting controller in manually or automatically controlled sequences. In order to achieve an optimum quality of the slab, a running on of the slag, which floats on the melt, into the continuous casting mould should be prevented. In principle, slag which passes into the continuous casting mould obliges interruption of the casting process, since slag inclusions render the cast material unusable.
Moreover, determination whether fault locations due to slag inclusions are present in a processed cast material makes the product more expensive. In order to prevent this, various procedures/methods were developed which during the pouring process determine the instant at which the slag mixes with the melt. It was established that in the case of a dropping bath level in the tundish a turbulence (vortex effect) forms at the outflow opening.
Due to the vortex effect the slag present on the melt bath surface is drawn into the outflowing melt and flows in the casting stream.
A checking and measuring method is known from EP 0 172 394 which prevents penetration of slag into a continuous casting mould and thus into the cast material. The specification describes a continuous measurement of the weight of the reservoir vessel with melt content and a continuous measurement, which is parallel in time, of the melt meniscus height in the reservoir vessel. The presence of slag is calculated from the difference from the specific weight of the melt.
A method is known from WO 2005/062846 in which the vortex effect is detected by way of microwave measurement directly above the outflow opening and closure of the outflow opening is subsequently activated.
A method and a device are known from WO 90/13380 in which the vortex effect is detected by way of an oscillation measurement at the outflow pipe of the container. This signal is then supplied to a control device which in response to the signal causes closure of the outflow opening through movement of a slide into the outflow pipe.
Since the oscillation sensor is mounted at the lower linkage of the device, the vortex effect is disadvantageously detected only when it has formed in the outflow pipe and the oscillation has then been transmitted to the device.
Starting from the outlined prior art it is the object of the invention to develop a known device or a known method for closing an outflow opening of a metallurgical vessel in such a way that the instant of occurrence of the vortex effect is detected directly and immediately on occurrence and closure of the vessel takes place in good time and immediately.
This object is fulfilled by the subject of claim 1. This subject is characterised by a plug rod, which is arranged in the vessel above the outflow opening, for closing the outflow opening, a plug rod mechanism for raising and lowering the plug rod, a sensor for detecting oscillations of the plug rod or of the plug rod mechanism caused by the flow of melt out of the vessel via the outflow opening, and a control device for activating a closure device for the outflow opening of the vessel in dependence on the oscillations, which are detected by the sensor, at the plug rod or at the plug rod mechanism.
Vortex stands as a synonym for turbulence. In fluid dynamics, circular flows of a fluid are termed turbulence. If a fluid flows out of a reservoir into an outflow pipe a turbulence forms, because a sufficiently large speed gradient arises within the fluid.
This means that a part of the fluid flows significantly more quickly than the rest.
Due to the fact that the plug rod is arranged in the melt directly and immediately above the outflow opening of the metallurgical vessel and the plug rod mechanism is connected therewith the possibility of a very early and time-parallel detection of oscillation in the centre of the turbulence results. The sensor, which is arranged either at the plug rod or at the plug rod mechanism, detects the oscillations as a primary signal and passes this on to a control device. As soon as the process situation of a vortex arises in the vessel the sensor passes on the oscillation of the plug rod or of the plug rod mechanism in the form of an electrical signal directly and contemporaneously to the control mechanism and closure of the outflow opening of the metallurgical vessel is immediately effected. Due to the fact that the vortex effect is recognised earlier and also the consequent closure of the outflow opening takes place earlier than in the prior art an optimum steel yield with low loss is ensured with the present invention. An optimum steel yield is guaranteed if a maximum proportion of metal melt flows into the continuous casting mould and the slag component is equal to zero. A closure of the tundish / distributor gutter which is reliable, reproducible and selectively appropriate in time is given by this arrangement.
Improved purity of the last slab, i.e. no slag is present in the steel flow to the mould, is to be mentioned as a further advantage.
According to a first embodiment the closure device for the outflow opening is constructed as a slide, which is arranged below the outflow opening, or as the plug rod.
Both closure processes of the outflow opening, either with the plug rod or with the slide below the outflow opening, have the effect that the outflow of the slag now contained in the melt is prevented. The slide can also be constructed as an emergency slide, i.e. the outflow opening can also be closed if the plug rod does not sufficiently close the outflow opening.
This can occur, for example, due to technical defects.
The sensor, which can be constructed as an electrical oscillation sensor, acceleration sensor, sonic sensor, strain gauge, force sensor, pressure sensor or position sensor, detects the oscillation frequency at the plug or at the plug rod mechanism adequately and contemporaneously and passes this detected oscillation on, as an electrical signal, to the control device.
The above-mentioned object is additionally fulfilled by the method claimed in the independent method claim 4. The advantages of this solution in terms of method correspond with the advantages cited above with respect to the device.
Further advantageous embodiments of the device and of the method of the invention are indicated in the subclaims.
Accompanying the description is a figure, in which Figure 1 shows a general arrangement of the device.
The device according to the invention and the method according to the invention are described in detail in the following with reference to Figure 1.
In continuous casting plants the process of pouring liquid steel takes place by way of pouring ladles, tundishes (distributor gutters) in oscillating moulds with a downstream strip guide system. The targeted maximum emptying of the intermediate container /
distributor gutters takes place with consideration of the instantaneous casting speed, the instantaneous distributor weight and the experience of the casting controller in manually or automatically controlled sequences. In order to achieve an optimum quality of the slab, a running on of the slag, which floats on the melt, into the continuous casting mould should be prevented. In principle, slag which passes into the continuous casting mould obliges interruption of the casting process, since slag inclusions render the cast material unusable.
Moreover, determination whether fault locations due to slag inclusions are present in a processed cast material makes the product more expensive. In order to prevent this, various procedures/methods were developed which during the pouring process determine the instant at which the slag mixes with the melt. It was established that in the case of a dropping bath level in the tundish a turbulence (vortex effect) forms at the outflow opening.
Due to the vortex effect the slag present on the melt bath surface is drawn into the outflowing melt and flows in the casting stream.
A checking and measuring method is known from EP 0 172 394 which prevents penetration of slag into a continuous casting mould and thus into the cast material. The specification describes a continuous measurement of the weight of the reservoir vessel with melt content and a continuous measurement, which is parallel in time, of the melt meniscus height in the reservoir vessel. The presence of slag is calculated from the difference from the specific weight of the melt.
A method is known from WO 2005/062846 in which the vortex effect is detected by way of microwave measurement directly above the outflow opening and closure of the outflow opening is subsequently activated.
A method and a device are known from WO 90/13380 in which the vortex effect is detected by way of an oscillation measurement at the outflow pipe of the container. This signal is then supplied to a control device which in response to the signal causes closure of the outflow opening through movement of a slide into the outflow pipe.
Since the oscillation sensor is mounted at the lower linkage of the device, the vortex effect is disadvantageously detected only when it has formed in the outflow pipe and the oscillation has then been transmitted to the device.
Starting from the outlined prior art it is the object of the invention to develop a known device or a known method for closing an outflow opening of a metallurgical vessel in such a way that the instant of occurrence of the vortex effect is detected directly and immediately on occurrence and closure of the vessel takes place in good time and immediately.
This object is fulfilled by the subject of claim 1. This subject is characterised by a plug rod, which is arranged in the vessel above the outflow opening, for closing the outflow opening, a plug rod mechanism for raising and lowering the plug rod, a sensor for detecting oscillations of the plug rod or of the plug rod mechanism caused by the flow of melt out of the vessel via the outflow opening, and a control device for activating a closure device for the outflow opening of the vessel in dependence on the oscillations, which are detected by the sensor, at the plug rod or at the plug rod mechanism.
Vortex stands as a synonym for turbulence. In fluid dynamics, circular flows of a fluid are termed turbulence. If a fluid flows out of a reservoir into an outflow pipe a turbulence forms, because a sufficiently large speed gradient arises within the fluid.
This means that a part of the fluid flows significantly more quickly than the rest.
Due to the fact that the plug rod is arranged in the melt directly and immediately above the outflow opening of the metallurgical vessel and the plug rod mechanism is connected therewith the possibility of a very early and time-parallel detection of oscillation in the centre of the turbulence results. The sensor, which is arranged either at the plug rod or at the plug rod mechanism, detects the oscillations as a primary signal and passes this on to a control device. As soon as the process situation of a vortex arises in the vessel the sensor passes on the oscillation of the plug rod or of the plug rod mechanism in the form of an electrical signal directly and contemporaneously to the control mechanism and closure of the outflow opening of the metallurgical vessel is immediately effected. Due to the fact that the vortex effect is recognised earlier and also the consequent closure of the outflow opening takes place earlier than in the prior art an optimum steel yield with low loss is ensured with the present invention. An optimum steel yield is guaranteed if a maximum proportion of metal melt flows into the continuous casting mould and the slag component is equal to zero. A closure of the tundish / distributor gutter which is reliable, reproducible and selectively appropriate in time is given by this arrangement.
Improved purity of the last slab, i.e. no slag is present in the steel flow to the mould, is to be mentioned as a further advantage.
According to a first embodiment the closure device for the outflow opening is constructed as a slide, which is arranged below the outflow opening, or as the plug rod.
Both closure processes of the outflow opening, either with the plug rod or with the slide below the outflow opening, have the effect that the outflow of the slag now contained in the melt is prevented. The slide can also be constructed as an emergency slide, i.e. the outflow opening can also be closed if the plug rod does not sufficiently close the outflow opening.
This can occur, for example, due to technical defects.
The sensor, which can be constructed as an electrical oscillation sensor, acceleration sensor, sonic sensor, strain gauge, force sensor, pressure sensor or position sensor, detects the oscillation frequency at the plug or at the plug rod mechanism adequately and contemporaneously and passes this detected oscillation on, as an electrical signal, to the control device.
The above-mentioned object is additionally fulfilled by the method claimed in the independent method claim 4. The advantages of this solution in terms of method correspond with the advantages cited above with respect to the device.
Further advantageous embodiments of the device and of the method of the invention are indicated in the subclaims.
Accompanying the description is a figure, in which Figure 1 shows a general arrangement of the device.
The device according to the invention and the method according to the invention are described in detail in the following with reference to Figure 1.
A metallurgical vessel 110 is illustrated in Figure 1, in which melt 140 is fed from a ladle 100 and discharged via an outflow opening 120 into an oscillating mould 130.
The adjoining strip guide is not illustrated here. Arranged exactly above and centrally over the outflow opening 120 is a plug rod 205, which is connected with a plug rod mechanism 210.
A sensor 220 is mounted on the plug rod 205 or the plug rod mechanism 210 and passes to a control device 230, as signals, the oscillations of the plug rod or the plug rod mechanism 210 arising as a consequence of formation of turbulence in the melt 140. A
slide 300, which can be used as an emergency slide, is arranged below the outflow opening 120. The outflow opening 120 can thus be closed either by the plug rod 205 or by the slide 300.
The vortex effect occurring when the melt 140 flows out of the metallurgical vessel 110 generates oscillations in the melt 140. The arising oscillations in the melt 140 are transmitted to the plug rod 205, which is disposed in the melt 140, and thus to the plug rod mechanism 210. Since the plug rod 205 is arranged directly and centrally above the outflow opening 120 a contemporaneous and direct transmission of the oscillations, as primary signal, to the plug rod 205 and the plug rod mechanism 210 is given.
These oscillations are detected by a sensor 220, which is arranged at the plug rod 205 or plug rod mechanism 210, and passed on as a signal to a control device 230. The control device 230 compares the signal with a predetermined threshold value. If the instantaneous amplitude and/or frequency of the oscillations represented by the signal exceed the predetermined threshold value the control device generates an output signal which activates the closure. Either the plug rod 205 or a slide 300 below the outflow opening 120 is activated, which causes closure of the outflow opening 120.
Since from the occurrence of the vortex effect there is the risk that slag and melt intermix, a targeted, timely and direct lowering of the plug rod 205 or targeted timely and rapid blocking of the steel flow by way of the slide 300 below the outflow opening 120 is needed. In the case of the present invention the instant for closure of the outflow opening is necessary so that an optimum separation between melt and slag is achieved. Precisely this instant is determined by way of the vortex effect, which arises always. when the metallurgical vessel 110 is to be emptied at the end of casting or when a change of the vessel 110 takes place.
Reference numeral list 100 ladle 110 metallurgical vessel 120 outflow opening 130 mould 140 melt 200 device 205 plug rod 210 plug rod mechanism 220 sensor 230 control device 300 slide
The adjoining strip guide is not illustrated here. Arranged exactly above and centrally over the outflow opening 120 is a plug rod 205, which is connected with a plug rod mechanism 210.
A sensor 220 is mounted on the plug rod 205 or the plug rod mechanism 210 and passes to a control device 230, as signals, the oscillations of the plug rod or the plug rod mechanism 210 arising as a consequence of formation of turbulence in the melt 140. A
slide 300, which can be used as an emergency slide, is arranged below the outflow opening 120. The outflow opening 120 can thus be closed either by the plug rod 205 or by the slide 300.
The vortex effect occurring when the melt 140 flows out of the metallurgical vessel 110 generates oscillations in the melt 140. The arising oscillations in the melt 140 are transmitted to the plug rod 205, which is disposed in the melt 140, and thus to the plug rod mechanism 210. Since the plug rod 205 is arranged directly and centrally above the outflow opening 120 a contemporaneous and direct transmission of the oscillations, as primary signal, to the plug rod 205 and the plug rod mechanism 210 is given.
These oscillations are detected by a sensor 220, which is arranged at the plug rod 205 or plug rod mechanism 210, and passed on as a signal to a control device 230. The control device 230 compares the signal with a predetermined threshold value. If the instantaneous amplitude and/or frequency of the oscillations represented by the signal exceed the predetermined threshold value the control device generates an output signal which activates the closure. Either the plug rod 205 or a slide 300 below the outflow opening 120 is activated, which causes closure of the outflow opening 120.
Since from the occurrence of the vortex effect there is the risk that slag and melt intermix, a targeted, timely and direct lowering of the plug rod 205 or targeted timely and rapid blocking of the steel flow by way of the slide 300 below the outflow opening 120 is needed. In the case of the present invention the instant for closure of the outflow opening is necessary so that an optimum separation between melt and slag is achieved. Precisely this instant is determined by way of the vortex effect, which arises always. when the metallurgical vessel 110 is to be emptied at the end of casting or when a change of the vessel 110 takes place.
Reference numeral list 100 ladle 110 metallurgical vessel 120 outflow opening 130 mould 140 melt 200 device 205 plug rod 210 plug rod mechanism 220 sensor 230 control device 300 slide
Claims (5)
1. Device (200) for closing an outflow opening (120) of a metallurgical vessel (110), characterised by:
a plug rod (205), which is arranged in the vessel above the outflow opening (120), for closing the outflow opening (120);
a plug rod mechanism (210) for raising and lowering the plug rod (205);
a sensor (220) for detecting oscillations of the plug rod (205) or of the plug rod mechanism (210) caused by flow of melt (140) out of the vessel through the outflow opening (120); and a control device (230) for activating a closure device for the outflow opening (120) of the vessel in dependence on the oscillations, which are detected by the sensor (220), at the plug rod (205) or at the plug rod mechanism (210).
a plug rod (205), which is arranged in the vessel above the outflow opening (120), for closing the outflow opening (120);
a plug rod mechanism (210) for raising and lowering the plug rod (205);
a sensor (220) for detecting oscillations of the plug rod (205) or of the plug rod mechanism (210) caused by flow of melt (140) out of the vessel through the outflow opening (120); and a control device (230) for activating a closure device for the outflow opening (120) of the vessel in dependence on the oscillations, which are detected by the sensor (220), at the plug rod (205) or at the plug rod mechanism (210).
2. Device (200) according to claim 1, characterised in that the closure device for the outflow opening (120) is constructed as a slide (300), which is arranged below the outflow opening (120), or as the plug rod (205).
3. Device (200) according to claim 1, characterised in that the sensor (220) can be constructed as an electrical oscillation sensor, acceleration sensor, sonic sensor, strain gauge, force sensor, pressure sensor or position sensor.
4. Method of closing an outflow opening (120) of a metallurgical vessel (110), comprising the following steps:
detecting, with the help of a sensor (220), oscillations in a melt (140) in the metallurgical vessel (110) due to formation of turbulence during flow of the melt (140) out of the vessel;
and activating a closure device for the outflow opening (120) of the vessel in dependence on the oscillations detected by the sensor (220);
characterised in that the oscillations in the melt (140) are transmitted to a plug rod (205), which projects into the melt (140), and to a plug rod mechanism (210) and are detected at the plug rod (205) or the plug rod mechanism (210) by the sensor (220).
detecting, with the help of a sensor (220), oscillations in a melt (140) in the metallurgical vessel (110) due to formation of turbulence during flow of the melt (140) out of the vessel;
and activating a closure device for the outflow opening (120) of the vessel in dependence on the oscillations detected by the sensor (220);
characterised in that the oscillations in the melt (140) are transmitted to a plug rod (205), which projects into the melt (140), and to a plug rod mechanism (210) and are detected at the plug rod (205) or the plug rod mechanism (210) by the sensor (220).
5. Method according to claim 4, characterised in that a value of the amplitude and/or of the frequency of a signal, which is generated by the sensor (220) and represents the detected oscillation and which is greater than or equal to a predetermined threshold value, triggers the activation for closing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010012062.6 | 2010-03-19 | ||
| DE102010012062A DE102010012062A1 (en) | 2010-03-19 | 2010-03-19 | Device and method for closing a discharge opening of a metallurgical vessel |
| PCT/EP2011/053152 WO2011113701A1 (en) | 2010-03-19 | 2011-03-03 | Device and method for closing an outflow opening of a metallurgical vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2793913A1 true CA2793913A1 (en) | 2011-09-22 |
Family
ID=44080337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2793913A Abandoned CA2793913A1 (en) | 2010-03-19 | 2011-03-03 | Device and method for closing an outflow opening of a metallurgical vessel |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP2547472A1 (en) |
| KR (1) | KR20120132637A (en) |
| CN (1) | CN102985196A (en) |
| BR (1) | BR112012023626A2 (en) |
| CA (1) | CA2793913A1 (en) |
| DE (1) | DE102010012062A1 (en) |
| RU (1) | RU2012144443A (en) |
| WO (1) | WO2011113701A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521744B (en) * | 2013-10-14 | 2015-08-12 | 南昌大学 | A kind of semi solid slurry connects dispensing device |
| DE102014107778A1 (en) * | 2014-06-03 | 2015-12-03 | Uwe Geib | Segmented outlet trough |
| CN109332625B (en) * | 2018-11-08 | 2021-04-27 | 武汉钢铁有限公司 | Casting method for improving stopper rod flow control Al deoxidized steel nozzle blockage |
| JP7208845B2 (en) * | 2019-03-27 | 2023-01-19 | 黒崎播磨株式会社 | Opening and closing device |
| CN110653347A (en) * | 2019-10-31 | 2020-01-07 | 广东工业大学 | Plugging device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421344C2 (en) * | 1984-06-08 | 1993-04-29 | Krupp Stahl Ag, 4630 Bochum | Method and device for automatically filling a continuous casting mold when casting a strand |
| DE3430558C2 (en) | 1984-08-20 | 1986-10-16 | Mannesmann AG, 4000 Düsseldorf | Method and device for controlling slag in a storage container during the continuous casting of metal, in particular steel |
| US5042700A (en) | 1989-05-12 | 1991-08-27 | Stopinc Aktiengesellschaft | Process and equipment to determine disturbance variables when pouring molten metal from a container |
| CN1096473A (en) * | 1993-06-18 | 1994-12-21 | 冶金工业部洛阳耐火材料研究院 | Monolithic stopper for continuous casting and production technology |
| JPH1110301A (en) * | 1997-06-27 | 1999-01-19 | Nippon Steel Corp | Stopper device for controlling high accurate flow rate and continuous casting method using it and device therefor |
| CN1070745C (en) * | 1998-09-18 | 2001-09-12 | 重庆钢铁(集团)有限责任公司 | Liquid level control system for conticaster mould |
| CN1377747A (en) * | 2001-04-03 | 2002-11-06 | 董淑冬 | Control system for middle ladle plunger of continuous casting machine |
| WO2005062846A2 (en) | 2003-12-23 | 2005-07-14 | Uec Technologies Llc | Tundish control |
-
2010
- 2010-03-19 DE DE102010012062A patent/DE102010012062A1/en not_active Withdrawn
-
2011
- 2011-03-03 CN CN2011800247812A patent/CN102985196A/en active Pending
- 2011-03-03 RU RU2012144443/02A patent/RU2012144443A/en not_active Application Discontinuation
- 2011-03-03 KR KR1020127027000A patent/KR20120132637A/en not_active Application Discontinuation
- 2011-03-03 WO PCT/EP2011/053152 patent/WO2011113701A1/en active Application Filing
- 2011-03-03 CA CA2793913A patent/CA2793913A1/en not_active Abandoned
- 2011-03-03 BR BR112012023626A patent/BR112012023626A2/en not_active IP Right Cessation
- 2011-03-03 EP EP11708763A patent/EP2547472A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN102985196A (en) | 2013-03-20 |
| WO2011113701A1 (en) | 2011-09-22 |
| KR20120132637A (en) | 2012-12-06 |
| RU2012144443A (en) | 2014-04-27 |
| DE102010012062A1 (en) | 2011-09-22 |
| BR112012023626A2 (en) | 2016-08-02 |
| EP2547472A1 (en) | 2013-01-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20150126 |