CN116604009B - Device and method for rapidly opening flow after flow blocking of tundish - Google Patents
Device and method for rapidly opening flow after flow blocking of tundish Download PDFInfo
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- CN116604009B CN116604009B CN202310871933.7A CN202310871933A CN116604009B CN 116604009 B CN116604009 B CN 116604009B CN 202310871933 A CN202310871933 A CN 202310871933A CN 116604009 B CN116604009 B CN 116604009B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000003384 imaging method Methods 0.000 claims abstract description 32
- 230000024121 nodulation Effects 0.000 claims description 51
- 239000000523 sample Substances 0.000 claims description 29
- 238000009749 continuous casting Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- 238000005524 ceramic coating Methods 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims 4
- 238000011217 control strategy Methods 0.000 claims 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
Classifications
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/62—Pouring-nozzles with stirring or vibrating 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
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a device and a method for quickly opening a tundish after blocking the flow, wherein the device comprises a tundish water outlet, a plurality of vertical guide rails arranged around the outer wall of the water outlet, an annular rail arranged on the vertical guide rails, a first ultrasonic transmitting device and a second ultrasonic transmitting device arranged on the annular rail, and a computer for controlling the annular rail to move on the vertical guide rails and the first ultrasonic transmitting device and the second ultrasonic transmitting device to move on the annular rail, wherein the computer is externally connected with an ultrasonic imaging instrument. The invention strengthens cavitation and mechanical vibration of ultrasonic wave and improves the clearing force and the clearing efficiency by adjusting the frequency and the power of the two groups of ultrasonic transmitting devices. Meanwhile, the ultrasonic action range is enlarged to any position on the wall surface of the water outlet by utilizing the vertical guide rail and the annular rail, so that the device can meet the requirement of more complicated working conditions and has high industrial value.
Description
Technical Field
The invention relates to the technical field of metallurgical continuous casting, in particular to a device and a method for rapidly opening a tundish after blocking the flow.
Background
In the continuous casting process, the nodulation of the tundish nozzle is a great difficulty which puzzles metallurgical workers. Firstly, the sectional area of the inner part of the water gap is reduced due to the nodulation of the water gap of the tundish, so that the flow of molten steel is influenced, slag inclusions are easy to generate, and the quality of the molten steel is influenced. Secondly, the nodulation of the tundish nozzle can cause the nodulation of molten steel in the solidification process, thereby increasing the continuous casting production cost and reducing the production benefit. More importantly, the tundish nozzle knots limit the number of times of continuous casting furnaces, influence the continuous casting rhythm and reduce the production efficiency. Therefore, the tundish nozzle nodulation is a serious quality problem, and measures need to be taken in time for repair and prevention.
There are some patents related to removing the nodulation of the tundish nozzle, for example, chinese patent (CN 105268956 a) discloses a liquid slag tundish and a method for using the same, which uses a stopper rod to remove solid slag blocks remained near the nozzle, so as to realize the open flow and stop flow of the liquid slag tundish, but the patent is fixed for the removable area of the nodulation, has poor flexibility, and has to stop the furnace operation, thus affecting the continuous casting efficiency. Chinese patent (CN 111940716B) discloses a method for preventing clogging of a rare earth steel continuous casting nozzle, which increases the fluidity of molten steel by continuously heating up, and then obtains good effects of improving nozzle clogging and clogging, which makes it difficult to rapidly remove the clogging on the nozzle wall, and the removing force is not high.
Disclosure of Invention
Aiming at the problems of fixed removable area, slow removal process and low efficiency in the existing technical means for removing nozzle knots, the invention provides a device for rapidly opening flow after flow blockage of a tundish, which strengthens cavitation and mechanical vibration of ultrasonic waves and improves removal force and removal efficiency by adjusting the frequency and power of two groups of ultrasonic waves. Meanwhile, the ultrasonic action range is enlarged to any position on the wall surface of the water outlet by utilizing the vertical guide rail and the annular rail, so that the device can meet the requirement of more complicated working conditions and has high industrial value.
The present invention achieves the above technical object by the following means.
The device for rapidly opening the pouring basket after blocking the flow is characterized by comprising a pouring basket, a water outlet for communicating the bottom of the pouring basket with a crystallizer, a plurality of vertical guide rails arranged around the outer wall of the water outlet, an annular rail arranged on the vertical guide rails around the water outlet, a first ultrasonic transmitting device and a second ultrasonic transmitting device arranged on the annular rail, and a computer for controlling the annular rail to move on the vertical guide rails and controlling the first ultrasonic transmitting device and the second ultrasonic transmitting device to move on the annular rail; the computer is also externally connected with an ultrasonic imaging instrument for detecting the position and the size of the nodulation at the water outlet.
Further, the ultrasonic imager includes an ultrasonic transmitter for generating a high frequency acoustic signal, an ultrasonic receiver for receiving a reflected acoustic signal and converting it into an electrical signal, and a control circuit for processing and analyzing the received electrical signal and transmitting it to a computer.
Further, the first ultrasonic transmitting device and the second ultrasonic transmitting device comprise an ultrasonic probe and an ultrasonic generator which are sequentially connected.
Further, the surface of the ultrasonic probe is covered with an alumina ceramic coating, a silicon carbide coating or a silicon nitride coating.
Further, the outer wall of the water outlet is honeycomb-shaped, corrugated or spiral.
A method for rapidly opening a flow after blocking the flow of a tundish, which is characterized by adopting the device of any one of the above steps:
s1: and when continuous casting starts, starting the ultrasonic imaging instrument to perform intermittent scanning on the tundish drain outlet.
S2: when detecting that a node appears at the water outlet, the ultrasonic imaging instrument detects the size and the position information of the node in real time, and transmits the position information to the computer, and then the ultrasonic imaging instrument is closed.
S3: the computer controls the movement of the annular track, the first ultrasonic transmitting device and the second ultrasonic transmitting device according to the position information of the nodulation, so that the axes of the two groups of ultrasonic probes are intersected at the nodulation.
S4: when the diameter of the nodulation is smaller than 1cm, the power of the two groups of ultrasonic probes is adjusted to be 10-20W through the ultrasonic generator, the frequency is 20-30 kHz, the first ultrasonic transmitting device and the second ultrasonic transmitting device are started and carry out ultrasonic resonance, and then the first ultrasonic transmitting device and the second ultrasonic transmitting device are closed.
When the diameter of the nodulation is larger than 1cm, firstly adjusting the power of the two groups of ultrasonic probes to be 20-30W and the frequency to be 10-20 kHz, starting the first ultrasonic transmitting device and the second ultrasonic transmitting device and carrying out ultrasonic resonance, and then closing the first ultrasonic transmitting device and the second ultrasonic transmitting device; and adjusting the power of the two groups of ultrasonic probes to be 10-20W, and the frequency to be 20-30 kHz, starting the first ultrasonic transmitting device and the second ultrasonic transmitting device, performing ultrasonic resonance, and then closing the first ultrasonic transmitting device and the second ultrasonic transmitting device.
S5: starting the ultrasonic imaging instrument again to scan the water outlet, and if the nodulation still exists, continuing to repeat the step S4; if the nodulation is cleared, resetting the annular track, the first ultrasonic transmitting device and the second ultrasonic transmitting device, and continuously scanning the tundish sewer outlet.
Further, in the step S1, the frequency of the ultrasonic transmitter is 1-10 MHz, and the power is 1-10W; and the ultrasonic imaging instrument scans the water outlet once every 10-20 min.
Further, in the step S3, the included angle between the two axes is 30 ° to 60 °.
Further, in the step S4, the duration of ultrasonic resonance is 1-3 min.
Further, in the step S5, the frequency of the ultrasonic transmitter is 1-10 mhz, and the power is 1-10 w.
The beneficial effects of the invention are as follows:
1. according to the invention, through the coupling superposition of two groups of ultrasonic waves, the cavitation and mechanical vibration of the ultrasonic waves are enhanced, so that the binding force between the nodulation and the wall surface of the sewer outlet is more effectively destroyed, and the nodulation removing force and the nodulation removing efficiency are improved. The ultrasonic wave cleaning process can be carried out under normal continuous casting, so that the number of continuous casting furnaces is greatly increased, and the production efficiency is ensured. And ultrasonic wave belongs to non-contact clearance means, can guarantee the security of clearance.
2. The annular track can axially move around the water outlet, and the first ultrasonic transmitting device and the second ultrasonic transmitting device can circumferentially move along the water outlet, so that the acting range of the first ultrasonic transmitting device and the second ultrasonic transmitting device covers the whole wall surface of the water outlet, ultrasonic energy can be maximally concentrated near a nodulation position under the control of a computer, and the cleaning force of ultrasonic waves is greatly improved.
3. The invention designs two ultrasonic treatment modes aiming at the size of the nodulation, when the diameter of the nodulation is smaller than 1cm, the frequency of the ultrasonic wave used by the invention is higher, the power is lower, and the high-power sound wave is prevented from pressing the nodulation into the wall surface of the water gap while the clearing efficiency is improved; when the diameter of the nodulation is larger than 1cm, the ultrasonic wave with lower frequency and higher power is firstly used for crushing the nodulation, then the ultrasonic wave with higher frequency and lower power is used for thoroughly removing the nodulation, so that the removal effect is greatly enhanced.
4. The ultrasonic imaging instrument can timely feed back the position information of the knots to the computer, and the knots are removed when the knots are just formed, at the moment, the binding force between the knots and the wall surface of the water outlet is not high, and the ultrasonic imaging instrument is only in an adhesion state, so that an operator can adjust the frequency and the power of two groups of ultrasonic probes according to the knots provided by the ultrasonic imaging instrument, the efficiency of removing the knots is greatly improved, and meanwhile, the intelligent degree of the whole device is improved, so that the device can meet the requirement of more complicated working conditions, and has high industrial value.
Drawings
FIG. 1 is a schematic diagram of a device for rapid flow opening after flow blockage of a tundish according to the present invention;
FIG. 2 is a flow chart of a method for rapid flow opening after flow blocking of a tundish according to the present invention.
The reference numerals are as follows:
1. a water outlet; 2. a vertical guide rail; 3. an endless track; 4. a first ultrasound transmitting device; 5. a second ultrasound transmitting device; 6. a computer; 7. an ultrasonic imaging apparatus.
Description of the embodiments
The invention will be further described with reference to the drawings and the specific embodiments, but the scope of the invention is not limited thereto.
The device for quickly opening the pouring basket after blocking the flow comprises a pouring basket, a water outlet 1 for communicating the bottom of the pouring basket with a crystallizer, a plurality of vertical guide rails 2 arranged around the outer wall of the water outlet 1, an annular rail 3 arranged on the vertical guide rails 2 around the water outlet 1, a first ultrasonic transmitting device 4 and a second ultrasonic transmitting device 5 arranged on the annular rail 3, and a computer 6 for controlling the annular rail 3 to move on the vertical guide rails 2 and controlling the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 to move on the annular rail 3. The computer 6 is further externally connected with an ultrasonic imaging device 7 for detecting the position and the size of the nodulation at the water outlet 1, the ultrasonic imaging device 7 comprises an ultrasonic transmitter for generating high-frequency acoustic signals, an ultrasonic receiver for receiving reflected acoustic signals and converting the reflected acoustic signals into electric signals, and a control circuit (the ultrasonic transmitter, the ultrasonic receiver and the control circuit are not shown in the drawings) for processing and analyzing the received electric signals and transmitting the received electric signals to the computer, and fig. 1 is a schematic structural diagram of the device for rapidly opening the flow after the flow blockage of the tundish in the embodiment.
Further, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 comprise an ultrasonic probe and an ultrasonic generator (the ultrasonic probe and the ultrasonic generator are not shown in the figure) which are sequentially connected, and the surface of the ultrasonic probe is covered with an alumina ceramic coating, a silicon carbide coating or a silicon nitride coating.
Further, the outer wall of the water outlet 1 is honeycomb-shaped, corrugated or spiral.
Fig. 2 is a flowchart of a method for fast flow-opening after flow blocking of a tundish according to the present embodiment, and as shown in the figure, the specific operation steps for fast flow-opening using the above device are as follows:
s1: when continuous casting starts, an ultrasonic imager 7 is started to intermittently scan the tundish drain outlet 1, the frequency of an ultrasonic transmitter is 1-10 MHz, and the power is 1-10W; the ultrasonic imaging device 7 scans the water outlet 1 once every 10-20 min.
S2: when detecting that a node appears at the water outlet 1, the ultrasonic imaging instrument 7 detects the size and the position information of the node in real time, and transmits the position information to the computer 6, and then the ultrasonic imaging instrument 7 is turned off.
S3: the computer 6 controls the movement of the annular track 3, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 according to the position information of the nodulation, so that the axes of the two groups of ultrasonic probes are intersected at the nodulation, and the included angle of the two axes is 30-60 degrees.
S4: when the diameter of the nodulation is smaller than 1cm, the power of the two groups of ultrasonic probes is adjusted to be 10-20W through the ultrasonic generator, the frequency is 20-30 kHz, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are started and ultrasonic resonance is carried out for 1-3 min, and then the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are closed.
When the diameter of the nodulation is larger than 1cm, firstly adjusting the power of the two groups of ultrasonic probes to be 20-30W and the frequency to be 10-20 kHz, starting the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5, performing ultrasonic resonance for 1-3 min, and then closing the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5; and adjusting the power of the two groups of ultrasonic probes to be 10-20W, and the frequency to be 20-30 kHz, starting the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5, performing ultrasonic resonance for 1-3 min, and then closing the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5.
S5: adjusting the frequency of the ultrasonic transmitter to be 1-10 MHz and the power to be 1-10W, starting the ultrasonic imager 7 again to scan the water outlet 1, and continuously repeating the step S4 if a nodulation still exists; if the knots are cleared, resetting the annular track 3, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5, and continuously scanning the tundish nozzle 1.
Example 1
The method for rapidly opening the flow after the flow blockage of the tundish in the embodiment comprises the following steps:
s1: when continuous casting starts, an ultrasonic imaging instrument 7 is started to intermittently scan the tundish drain outlet 1, the frequency of an ultrasonic transmitter is 8MHz, and the power is 5W; the ultrasonic imaging device 7 scans the water outlet 1 once every 15 minutes.
S2: when the occurrence of the nodulation at the water outlet 1 is detected, the ultrasonic imaging instrument 7 detects the position information of the nodulation in real time and transmits the position information to the computer 6, meanwhile, the diameter of the nodulation is obtained through analysis to be 0.6cm, and then the ultrasonic imaging instrument 7 is turned off.
S3: the computer 6 controls the movement of the annular track 3, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 according to the position information of the nodulation, so that the axes of the two groups of ultrasonic probes meet at the nodulation, and the included angle of the two axes is 45 degrees.
S4: the power of the two groups of ultrasonic probes is adjusted to 15W through an ultrasonic generator, the frequency is 25kHz, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are started and ultrasonic resonance is carried out for 2 minutes, and then the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are closed.
S5: the frequency of the ultrasonic transmitter is adjusted to be 8MHz, the power is 5W, the ultrasonic imaging instrument 7 is started again to scan the sewer outlet 1, no knots are generated at the original corresponding positions, the annular track 3, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are reset, and intermittent scanning is continuously carried out on the tundish sewer outlet 1.
Example 2
The method for rapidly opening the flow after the flow blockage of the tundish in the embodiment comprises the following steps:
s1: when continuous casting starts, an ultrasonic imaging instrument 7 is started to intermittently scan the tundish drain outlet 1, the frequency of an ultrasonic transmitter is 8MHz, and the power is 5W; the ultrasonic imaging device 7 scans the water outlet 1 once every 15 minutes.
S2: when the occurrence of the nodulation at the water outlet 1 is detected, the ultrasonic imaging instrument 7 detects the position information of the nodulation in real time and transmits the position information to the computer 6, meanwhile, the diameter of the nodulation is obtained through analysis, and then the ultrasonic imaging instrument 7 is turned off.
S3: the computer 6 controls the movement of the annular track 3, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 according to the position information of the nodulation, so that the axes of the two groups of ultrasonic probes meet at the nodulation, and the included angle of the two axes is 45 degrees.
S4: firstly, adjusting the power of the two groups of ultrasonic probes to 25W through an ultrasonic generator, wherein the frequency is 15kHz, starting a first ultrasonic transmitting device 4 and a second ultrasonic transmitting device 5, performing ultrasonic resonance for 2 minutes, and then closing the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5; the power of the two groups of ultrasonic probes is adjusted to 15W again, the frequency is 25kHz, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are started and ultrasonic resonance is carried out for 2 minutes, and then the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are closed.
S5: the frequency of the ultrasonic transmitter is adjusted to be 8MHz, the power is 5W, the ultrasonic imaging instrument 7 is started again to scan the sewer outlet 1, no knots are generated at the original corresponding positions, the annular track 3, the first ultrasonic transmitting device 4 and the second ultrasonic transmitting device 5 are reset, and intermittent scanning is continuously carried out on the tundish sewer outlet 1.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.
Claims (9)
1. The device for rapidly opening the pouring basket after blocking the flow is characterized by comprising a pouring basket, a water outlet (1) for communicating the bottom of the pouring basket with a crystallizer, a plurality of vertical guide rails (2) arranged around the outer wall of the water outlet (1), an annular rail (3) arranged on the vertical guide rails (2) around the water outlet (1), a first ultrasonic transmitting device (4) and a second ultrasonic transmitting device (5) arranged on the annular rail (3), and a computer (6) for controlling the annular rail (3) to move on the vertical guide rails (2) and controlling the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) to move on the annular rail (3); the computer (6) is also externally connected with an ultrasonic imager (7) for detecting the position and the size of the nodulation at the water outlet (1);
the ultrasonic imager (7) comprises an ultrasonic transmitter for generating high frequency acoustic signals, an ultrasonic receiver for receiving reflected acoustic signals and converting them into electrical signals, a control circuit for processing and analyzing the received electrical signals and transmitting them to a computer (6);
the computer (6) is internally provided with a displacement control strategy for controlling the movement of the annular track (3), the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) according to the position information of the knots, so that the axes of the two groups of ultrasonic probes meet at the knots, and an ultrasonic control strategy for controlling the operation of the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) according to the diameters of the knots detected by the ultrasonic imaging instrument (7), wherein the ultrasonic control strategy is as follows:
when the diameter of the nodulation is smaller than 1cm, the power of the two groups of ultrasonic probes is adjusted to be 10-20W through an ultrasonic generator, the frequency is 20-30 kHz, the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are started and ultrasonic resonance is carried out, and then the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are closed;
when the diameter of the nodulation is larger than 1cm, the power of the two groups of ultrasonic probes is adjusted to be 20-30W, the frequency is 10-20 kHz, the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are started and ultrasonic resonance is carried out, and then the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are closed; and adjusting the power of the two groups of ultrasonic probes to be 10-20W and the frequency to be 20-30 kHz, starting the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) and performing ultrasonic resonance, and then closing the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5).
2. The device for rapid flow opening after flow blocking of a tundish according to claim 1, characterized in that the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) comprise an ultrasonic probe and an ultrasonic generator which are connected in sequence.
3. The device for rapid flow after flow blockage of a tundish according to claim 2, wherein the surface of the ultrasonic probe is covered with an alumina ceramic coating, a silicon carbide coating or a silicon nitride coating.
4. The device for rapid flow opening after flow blocking of the tundish according to claim 1, wherein the outer wall of the water outlet (1) is honeycomb-shaped, corrugated or spiral.
5. A method for rapid flow opening after flow blocking of a tundish, characterized by adopting the device as claimed in any one of claims 1 to 4, comprising the following specific operation steps:
s1: when continuous casting starts, an ultrasonic imaging instrument (7) is started to perform intermittent scanning on the tundish drainage port (1);
s2: when detecting that a nodulation occurs at the water outlet (1), the ultrasonic imaging instrument (7) detects the size and position information of the nodulation in real time, transmits the position information to the computer (6), and then closes the ultrasonic imaging instrument (7);
s3: the computer (6) controls the movement of the annular track (3), the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) according to the position information of the nodulation, so that the axes of the two groups of ultrasonic probes are intersected at the nodulation;
s4: when the diameter of the nodulation is smaller than 1cm, the power of the two groups of ultrasonic probes is adjusted to be 10-20W through an ultrasonic generator, the frequency is 20-30 kHz, the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are started and ultrasonic resonance is carried out, and then the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are closed;
when the diameter of the nodulation is larger than 1cm, the power of the two groups of ultrasonic probes is adjusted to be 20-30W, the frequency is 10-20 kHz, the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are started and ultrasonic resonance is carried out, and then the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are closed; the power of the two groups of ultrasonic probes is regulated to be 10-20W again, the frequency is 20-30 kHz, the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are started and ultrasonic resonance is carried out, and then the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5) are closed;
s5: starting the ultrasonic imaging instrument (7) again to scan the water outlet (1), and continuously repeating the step S4 if the nodulation still exists; and if the nodulation is cleared, resetting the annular track (3), the first ultrasonic transmitting device (4) and the second ultrasonic transmitting device (5), and continuously scanning the tundish sewer outlet (1).
6. The method for rapid flow opening after flow blocking of tundish according to claim 5, wherein in the step S1, the frequency of the ultrasonic transmitter is 1-10 MHz, and the power is 1-10W; the ultrasonic imaging instrument (7) scans the water outlet (1) once every 10-20 min.
7. The method for rapid flow after blocking the flow of a tundish according to claim 5, wherein in the step S3, the included angle between the two axes is 30 ° to 60 °.
8. The method for rapid flow opening after flow blocking of tundish according to claim 5, wherein in the step S4, the duration of ultrasonic resonance is 1-3 min.
9. The method for rapid flow switching after flow blocking of tundish according to claim 5, wherein in the step S5, the frequency of the ultrasonic transmitter is 1-10 MHz and the power is 1-10W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310871933.7A CN116604009B (en) | 2023-07-17 | 2023-07-17 | Device and method for rapidly opening flow after flow blocking of tundish |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310871933.7A CN116604009B (en) | 2023-07-17 | 2023-07-17 | Device and method for rapidly opening flow after flow blocking of tundish |
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| Publication Number | Publication Date |
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| CN116604009A CN116604009A (en) | 2023-08-18 |
| CN116604009B true CN116604009B (en) | 2023-10-20 |
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| CN202377526U (en) * | 2011-12-31 | 2012-08-15 | 王海军 | Tundish stopper with ultrasonic stirring function |
| CN105855529A (en) * | 2016-06-08 | 2016-08-17 | 武汉科技大学 | Micro argon bubble bottom blowing air brick for tundish refining |
| CN108176844A (en) * | 2018-01-15 | 2018-06-19 | 山东钢铁股份有限公司 | A kind of device and method for clearing up tundish upper nozzle dross object |
| CN213437064U (en) * | 2020-08-27 | 2021-06-15 | 山东钢铁股份有限公司 | Device for preventing rare earth steel continuous casting nozzle from being blocked |
| CN115990668A (en) * | 2023-01-09 | 2023-04-21 | 鞍钢股份有限公司 | Method for inhibiting water gap blocking through ultrasonic waves |
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2023
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| CN202377526U (en) * | 2011-12-31 | 2012-08-15 | 王海军 | Tundish stopper with ultrasonic stirring function |
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