CN112157240B - Method for detecting blockage of submerged nozzle of crystallizer - Google Patents
Method for detecting blockage of submerged nozzle of crystallizer Download PDFInfo
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- CN112157240B CN112157240B CN202011054608.4A CN202011054608A CN112157240B CN 112157240 B CN112157240 B CN 112157240B CN 202011054608 A CN202011054608 A CN 202011054608A CN 112157240 B CN112157240 B CN 112157240B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
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- B22D11/18—Controlling or regulating processes or operations for pouring
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Abstract
The invention discloses a method for detecting blockage of a submerged nozzle of a crystallizer, which comprises the following steps: casting a tundish with molten steel and then setting the tundish to extend intoArgon blowing flow of the stopper rod in the crystallizer is kept constant, and the molten steel flows into the crystallizer from a gap between the stopper rod and a submerged nozzle arranged at the upper part of the crystallizer; casting for 4-10 min, and detecting the initial argon back pressure value P of the stopper rod0(ii) a Casting for more than 10min, adjusting the rod position of the stopper rod to adjust the amount of molten steel entering the crystallizer, and adjusting the argon back pressure value P of the stopper rodnMonitoring; according to the initial back pressure value P of the argon of the stopper rod0Argon back pressure value P of stopper rodnAnd judging, including: when P is present0If P is between 0.2bar and 0.6barn>0.8 bar; or when P is0>0.6bar if Pn>P0And +0.20, judging that the submerged nozzle of the crystallizer is blocked, and having high accuracy.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a method for detecting blockage of a submerged nozzle of a crystallizer.
Background
Inert gas-argon gas can all be blown into at stopper stick head, pouring basket upper nozzle and crystallizer immersion nozzle inner wall to the slab continuous casting in-process, and its purpose mainly has two aspects: 1) the method can prevent the impurities in the molten steel from adhering and gathering on the inner walls of the stopper rod head, the tundish water feeding port and the crystallizer submerged nozzle to form blockage; 2) meanwhile, fine argon bubbles can capture impurities in the molten steel floating process, and the molten steel purification effect is achieved. Argon is an inert gas, is blown into molten steel, does not participate in chemical reaction, is not dissolved, contains little hydrogen, nitrogen, oxygen and the like, and can be considered as a small vacuum chamber for the gas dissolved in the molten steel, and the partial pressure of other gases in the small bubbles is almost zero. The gas, impurities and the like in the molten steel continuously diffuse into the argon bubbles, collide and adhere to the argon bubbles and are removed along with the escape of the argon bubbles.
When the casting machine casts ultra-low carbon steel, the submerged nozzle is easy to be blocked. The plug adhered in the water gap can cause bias flow and crystallizer liquid level fluctuation, so that the casting blank has surface quality defects. The plug peeled off by scouring can be involved in molten steel or float to the casting powder, and large-particle inclusions are formed after the plug is captured by a solidified casting blank, so that the quality of the casting blank is influenced, the increase of continuous casting furnace number is restricted, and a submerged nozzle needs to be replaced or an unplanned casting stop accident is caused when the continuous casting furnace number is serious. The stopper rod argon blowing is one of key technologies of a crystallizer which is widely regarded at present, and the quality and the production of a casting blank are directly influenced if the operation is proper or not. The stopper is one of important flow control elements in the continuous casting process and controls the flow rate of molten steel from a tundish to a crystallizer. The behavior of the stopper rod in the casting process directly influences the flow fields in the submerged nozzle and the crystallizer; the flow rate of argon blown by the stopper rod has direct influence on the anti-blocking effect of the submerged nozzle and the fluctuation of the liquid level in the crystallizer, and the optimal argon flow rate not only ensures the good anti-blocking effect, but also ensures that molten steel is not involved in casting powder.
Because the inner wall of the water gap is attached with impurities, the steel passing amount of the water gap is reduced, the plug rod can be caused to rise under the condition that the pulling speed is not changed, and the backpressure of argon and argon blown by the plug rod is increased. When the water gap is blocked, only the operation of changing the water gap can be adopted, the water gap is operated to reduce the pulling speed, and an operator installs a newly baked water gap and then raises the pulling speed to a normal level. The stopper rod position is observed traditionally, the water port changing operation is carried out when the stopper rod position rises to the maximum value, but the stopper rod position is not risen to the maximum rod position in the later casting period, the stopper rod position is often blocked to a certain degree to carry out casting, the flow field in the crystallizer is disordered, the slag rolling of the meniscus in the crystallizer is influenced, the quality of a generated casting blank is reduced, sometimes the stopper rod position is not obviously changed and does not rise to the maximum opening degree in the casting process, the meniscus liquid level of the meniscus in the crystallizer rolls greatly, the change of the internal flow field is known to be large, and the stopper rod position is not operated according to the traditional method. Therefore, the traditional method for observing the position of the stopper rod is inaccurate in judgment and influences the quality of the casting blank.
Therefore, how to develop a detection method capable of accurately judging the blockage of the submerged nozzle of the crystallizer becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for detecting the blockage of the submerged nozzle of the crystallizer, which can accurately judge the blockage of the submerged nozzle of the crystallizer, has simple and convenient operation and obvious effect, can carry out pre-judgment on the blockage of the casting nozzle in time and take corresponding measures to improve the quality of a casting blank.
In order to achieve the above object, the present invention provides a method for detecting blockage of a submerged nozzle of a crystallizer, the method comprising:
pouring a tundish by using molten steel, and then setting argon blowing flow of a stopper rod extending into the tundish to keep the argon blowing flow constant, wherein the molten steel flows into the crystallizer from a gap between the stopper rod and a submerged nozzle arranged at the upper part of the crystallizer;
detecting the initial back pressure value P of the argon of the stopper rod when the casting time is 4-10 min0；
After the casting time is more than 10min, the amount of molten steel entering the crystallizer is adjusted by adjusting the position of the stopper rod, and the back pressure value P of argon of the stopper rod is adjustednMonitoring is carried out;
according to the initial back pressure value P of the argon of the stopper rod0Argon back pressure value P of stopper rodnJudging the blockage of the submerged nozzle of the crystallizer, comprising the following steps:
when P is present0If P is between 0.2bar and 0.6barn>0.8bar, judging that the submerged nozzle of the crystallizer is blocked;
when P is present0>0.6bar if Pn>P0+0.20, judging that the submerged nozzle of the crystallizer is blocked.
Furthermore, the lower part of the stopper rod extends into the tundish, the submerged nozzle is arranged at the bottom of the tundish, the crystallizer is arranged below the tundish, the upper part of the submerged nozzle is arranged in the tundish, the lower part of the submerged nozzle extends into the crystallizer, and the stopper rod and the submerged nozzle are coaxially arranged.
Further, the argon blowing flow of the stopper rod extending into the tundish is set according to the steel grade.
Further, the range of the argon blowing flow is 4 Nl/min-6 Nl/min.
Further, the initial back pressure value P of the argon of the stopper rod0And the argon back pressure value P of the stopper rodnAll refer to the pressure at the outlet against which the argon gas discharged from the stopper tube is subjected to the flow direction.
Further, the back pressure value P of argon gas to the stopper rodnPerforming monitoring, including: detecting the back pressure value P of the argon gas of the stopper rod every 5-30 sn。
Further, the submerged nozzle on the crystallizer is replaced after the blockage of the submerged nozzle of the crystallizer is judged.
Go toStep one, according to the initial back pressure value P of the argon of the stopper rod0Argon back pressure value P of stopper rodnJudge crystallizer immersion nozzle and block up, still include:
when P is present0If P is between 0.2bar and 0.6barnJudging that the submerged nozzle of the crystallizer is not blocked when the pressure is less than or equal to 0.8 bar;
when P is present0>At 0.6bar, if Pn≤P0+0.20, judging that the submerged nozzle of the crystallizer is not blocked.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
compared with the traditional method for observing the position of a stopper rod, the method for detecting the blockage of the submerged nozzle of the crystallizer provided by the invention has the advantages that the operation of changing the nozzle is carried out when the position of the stopper rod rises to the maximum value, but the submerged nozzle of the crystallizer is blocked to a certain extent when the stopper rod does not reach the maximum value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a method for detecting blockage of a submerged nozzle of a crystallizer according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a slab continuous casting argon blowing device provided by an embodiment of the invention;
1. a stopper rod; 11. a central cavity; 2. a tundish; 3. an immersion nozzle; 4. a crystallizer.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
according to an exemplary embodiment of the present invention, there is provided a method for detecting blockage of a submerged nozzle of a crystallizer, as shown in fig. 1, including:
s1, casting a tundish by using molten steel, and then setting argon blowing flow of a stopper rod extending into the tundish to keep the argon blowing flow constant, wherein the molten steel flows into the crystallizer from a gap between the stopper rod and a submerged nozzle arranged at the upper part of the crystallizer;
s2, detecting the initial back pressure value P of the argon of the stopper rod when the casting is carried out for 4-10 min0；
S3, after the casting time is more than 10min, the amount of molten steel entering the crystallizer is adjusted by adjusting the position of the stopper rod, and the back pressure value P of argon of the stopper rod is adjustednMonitoring is carried out;
s4, according to the initial back pressure value P of the argon of the stopper rod0Argon back pressure value P of stopper rodnJudging the blockage of the submerged nozzle of the crystallizer, comprising the following steps:
when P is present0If P is between 0.2bar and 0.6barn>0.80bar, judging that the submerged nozzle of the crystallizer is blocked;
when P is present0>0.6bar if Pn>P0+0.20, judging that the submerged nozzle of the crystallizer is blocked.
Compared with the traditional method for observing the position of a stopper rod, the method for detecting the blockage of the submerged nozzle of the crystallizer provided by the invention has the advantages that the operation of changing the nozzle is carried out when the position of the stopper rod rises to the maximum value, but the submerged nozzle of the crystallizer is blocked to a certain extent when the stopper rod does not reach the maximum value.
And the inventor finds that: comparing the back pressure of the secondary stopper rod of the casting furnace with the initial back pressure P0In the case of a change in the situation,
when P is present0At a value of between 0.2bar and 0.6bar, PnShould be less than or equal to 0.8bar, if PnIf the pressure is more than 0.80bar, judging that the submerged nozzle of the crystallizer is blocked, and immediately prompting an operator to carry out nozzle replacement operation;
when P is present0>0.6bar，PnShould be less than or equal to P0+0.20, if Pn>P0+0.20, judging that the submerged nozzle of the crystallizer is blocked, and immediately prompting an operator to change the nozzle.
TABLE 1 relationship between initial back pressure of stopper rod and instantaneous maximum back pressure of stopper rod for a certain heat
When the casting time is 4-10 min, the argon back pressure value of the stopper rod is detected as the initial back pressure value P0The reason is that: when casting is carried out for 4-10 min, the argon back pressure of the stopper rod is stable because the pulling speed and the molten steel flow rate tend to be stable; preferably, the casting is carried out for 5minMeasuring the argon back pressure value of the stopper as an initial back pressure value P0；
Specifically, as shown in fig. 2, a central cavity 11 is provided in the stopper rod 1, a lower portion of the stopper rod 1 extends into the tundish 2, the submerged nozzle 3 is provided at the bottom of the tundish 2, the crystallizer 4 is provided below the tundish 2, an upper portion of the submerged nozzle 3 is provided in the tundish 2, a lower portion of the submerged nozzle 4 extends into the crystallizer 4, and the stopper rod 1 and the submerged nozzle 3 are coaxially provided.
Specifically, the argon blowing flow of the stopper rod extending into the tundish is set according to the steel grade.
Generally, the argon blowing flow rate is in the range of 4Nl/min to 6 Nl/min.
Specifically, the initial back pressure value P of argon of the stopper rod0And the argon back pressure value P of the stopper rodnAll refer to the pressure at the outlet against which the argon gas discharged from the stopper tube is subjected to the flow direction.
As an alternative embodiment, the back pressure P of argon gas to the stopper rodnPerforming monitoring, including: detecting the back pressure value P of the argon gas of the stopper rod every 5-30 sn。
The detection is performed every 5s to 30s because: the back pressure value of argon of the stopper rod is non-high frequency data, and the detection interval of 5 s-30 s can reflect the change of the data and can meet the judgment requirement.
According to the detection method for the submerged nozzle blockage of the crystallizer, provided by the invention, the change condition of the backpressure of the submerged nozzle stopper rod is tracked and observed, so that the smooth condition of the pipeline inside the submerged nozzle can be judged more timely and effectively, the stability of the flow field in the crystallizer is ensured, the quality of a casting blank is ensured, the method is simple and easy to operate, and the nozzle blockage can be judged in advance.
The method for detecting the blockage of the submerged nozzle of the crystallizer is described in detail in the following by combining the examples, the comparative examples and experimental data.
Example 1
S1, casting the tundish by using molten steel, and then setting the argon blowing flow of the stopper rod according to the steel type to keep the argon blowing flow constant, wherein the section of the cast ultra-low carbon steel is 230mm multiplied by 1400mm, the steel type is DC06, and the argon blowing flow of the stopper rod is 4.5 Nl/min.
S2, drawing at a speed of 1.6m/min, adopting ultra-low carbon steel covering slag, controlling the superheat degree at 27 ℃, continuously casting 7 furnaces, and recording the backpressure of an initial stopper rod to be 0.41bar after a steel ladle opens a sliding plate for casting for 5min when a furnace 6 is cast;
s3, recording the instantaneous back pressure value P of the stopper rod at intervals of 10S1，P2…PnAnd (4) recording the instantaneous back pressure value of the stopper rod to reach 0.82bar at the moment of casting in the 7 th furnace for 25 min;
s4, due to P0The value is between 0.2bar and 0.6bar if Pn>And (5) 0.8bar, judging that the submerged nozzle of the crystallizer is blocked, and immediately performing water nozzle replacement operation.
Meanwhile, the liquid level at the left side of the water gap in the crystallizer is found to shake violently through observation, the liquid level at the right side is too stable, the bias flow phenomenon possibly occurs through analysis, the water gap is replaced, photographing observation is carried out, and the phenomenon that the water gap is obviously blocked at the right side is found; the detection method for detecting the submerged nozzle blockage of the crystallizer is high in accuracy, simple and convenient to operate and remarkable in effect, and can be used for pre-judging the blockage of the casting nozzle in time and taking corresponding measures to improve the quality of a casting blank. The precision of the method of the embodiment is more than 99% after a plurality of pouring experiments.
Example 2
S1, casting the tundish by using molten steel, and then setting argon blowing flow of the stopper rod according to steel type to keep the argon blowing flow constant, wherein the section of the cast ultra-low carbon steel is 230mm multiplied by 1750mm, the steel type is DC04, and the argon blowing flow of the stopper rod is 4.5 Nl/min.
S2, drawing at a speed of 1.3m/min, continuously casting a 7 th furnace by adopting ultra-low carbon steel covering slag with the superheat degree controlled at 31 ℃, and recording the backpressure of an initial stopper rod to be 0.41bar after a steel ladle is opened to cast for 5min when the 7 th furnace is cast;
s3, recording the instantaneous back pressure value P of the stopper rod at intervals of 10S1，P2…PnAnd recording the instantaneous back pressure value of the stopper rod at the moment of casting for 25min0.83bar is reached;
s4, due to P0The value is between 0.2bar and 0.6bar if Pn>And (5) 0.8bar, judging that the submerged nozzle of the crystallizer is blocked, and immediately performing water nozzle replacement operation.
Meanwhile, the liquid level on the right side of the water gap in the crystallizer is found to shake violently through observation, the liquid level on the left side is too stable, the bias flow phenomenon possibly occurs through analysis, the water gap is replaced, photographing observation is carried out, and the phenomenon that the water gap is obviously blocked on the left side is found; the detection method for detecting the submerged nozzle blockage of the crystallizer is high in accuracy, simple and convenient to operate and remarkable in effect, and can be used for pre-judging the blockage of the casting nozzle in time and taking corresponding measures to improve the quality of a casting blank.
Example 3
S1, casting the tundish by using molten steel, and then setting the argon blowing flow of the stopper rod according to the steel type to keep the argon blowing flow constant, wherein the section of the cast ultra-low carbon steel is 230mm multiplied by 1900mm, the steel type is DC06, and the argon blowing flow of the stopper rod is 5.0 Nl/min.
And S2, drawing at a speed of 1.1m/min, continuously casting a 7 th furnace by adopting ultra-low carbon steel covering slag with the superheat degree controlled at 30 ℃, and recording the backpressure of an initial stopper rod to be 0.71bar after a steel ladle is opened for casting for 5min when the 7 th furnace is cast.
S3, recording the instantaneous back pressure value P of the stopper rod at intervals of 10S1，P2…PnAnd at the moment of casting for 17min, recording that the instantaneous back pressure value of the stopper rod reaches 0.92 bar.
S4, due to P0>0.6bar if Pn>P0And +0.20, judging that the submerged nozzle of the crystallizer is blocked, and immediately performing water port replacement operation.
The liquid level of the crystallizer is observed to roll suddenly and calmly, the two sides of the water gap are blocked, the operation of changing the water gap is carried out, and the observation of changing the water gap shows that the two sides of the water gap are obviously blocked.
Comparative example 1
The comparative example adopts the traditional method, namely the traditional method adopts the observation of the stopper rod position to carry out observation, and when the stopper rod position rises to the maximum value, the water port changing operation is carried out, specifically:
s1, casting the tundish by using molten steel, and then setting argon blowing flow of the stopper rod according to steel type to keep the argon blowing flow constant, wherein the section of the cast ultra-low carbon steel is 230mm multiplied by 1650mm, the steel type is DC04, and the argon blowing flow of the stopper rod is 4.5 Nl/min.
S2, drawing speed 1.3m/min, adopting ultra-low carbon steel covering slag, controlling superheat degree at 26 ℃, and continuously casting 7 furnaces.
S3, the height of the casting starting rod position is 50mm, the height of the casting stopping rod position is 73mm, and the height is 85mm lower than the maximum height of the stopper rod position.
The observation of the pouring process shows that the liquid level fluctuation of one side of the water gap in the crystallizer is strong, and the liquid level of the other side is relatively stable. And observing the changed water outlet, and finding that the single side of the water outlet is seriously blocked. Indicating that the stopper rod does not reach the maximum value and the submerged nozzle of the crystallizer is blocked.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A method for detecting blockage of a submerged nozzle of a crystallizer is characterized by comprising the following steps:
pouring a tundish by using molten steel, and then setting argon blowing flow of a stopper rod extending into the tundish to keep the argon blowing flow constant, wherein the molten steel flows into the crystallizer from a gap between the stopper rod and a submerged nozzle arranged at the upper part of the crystallizer, and the range of the argon blowing flow is 4 Nl/min-6 Nl/min;
detecting the initial back pressure value P of the argon of the stopper rod when the casting time is 4-10 min0；
After the casting time is more than 10min, the amount of molten steel entering the crystallizer is adjusted by adjusting the position of the stopper rod, and the argon back pressure value P of the stopper rod is detected at intervals of 5-30 snThe initial back pressure value P of argon of the stopper rod0And the argon back pressure value P of the stopper rodnThe argon gas discharged from the stopper rod pipeline is subjected to pressure opposite to the flow direction at an outlet; according to the initial back pressure value P of the argon of the stopper rod0Argon back pressure value P of stopper rodnJudging the blockage of the submerged nozzle of the crystallizer, comprising the following steps:
when P is present0If P is between 0.2bar and 0.6barn>0.8bar, judging that the submerged nozzle of the crystallizer is blocked;
when P is present0>0.6bar if Pn>P0+0.20, judging that the submerged nozzle of the crystallizer is blocked.
2. The method for detecting the blockage of the submerged nozzle of the crystallizer of claim 1, wherein the lower part of the stopper rod extends into the tundish, the submerged nozzle is arranged at the bottom of the tundish, the crystallizer is arranged below the tundish, the upper part of the submerged nozzle is arranged in the tundish, the lower part of the submerged nozzle extends into the crystallizer, and the stopper rod and the submerged nozzle are coaxially arranged.
3. The method for detecting the blockage of the submerged nozzle of the crystallizer as claimed in claim 1, wherein the argon blowing flow rate of the stopper rod extending into the tundish is set according to the steel grade.
4. The method for detecting the blockage of the submerged nozzle of the crystallizer as claimed in claim 1, wherein the initial argon back pressure P of the stopper rod is detected when the casting time is 5min0。
5. The method for detecting the blockage of the submerged nozzle of the crystallizer of claim 1, wherein the submerged nozzle on the crystallizer is replaced after the blockage of the submerged nozzle of the crystallizer is judged.
6. The method for detecting the blockage of the submerged nozzle of the crystallizer according to claim 1, wherein the method is characterized in that the method is based on the initial back pressure P of the stopper rod argon0Argon back pressure value P of stopper rodnJudge crystallizer immersion nozzle and block up, still include:
when P is present0If P is between 0.2bar and 0.6barnJudging that the submerged nozzle of the crystallizer is not blocked when the pressure is less than or equal to 0.8 bar;
when P is present0>At 0.6bar, if Pn≤P0+0.20, judging that the submerged nozzle of the crystallizer is not blocked.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2521462A1 (en) * | 1982-02-15 | 1983-08-19 | Poncet Pierre | Metal feed equipment for continuous casting - includes stopper extension creating back pressure in immersion nozzle |
| EP0320481A1 (en) * | 1987-11-25 | 1989-06-14 | Vesuvius International Corporation | Gas permeable stopper rod |
| CN103451349A (en) * | 2013-08-16 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Control method for preventing nozzle clogging in casting process of ultra-low carbon-aluminium deoxidized molten steel |
| CN106881457A (en) * | 2017-03-28 | 2017-06-23 | 马鞍山钢铁股份有限公司 | Molten steel pours device and part is sealed with argon and the method that part carries out argon envelope is sealed using argon |
| CN111308574A (en) * | 2020-02-12 | 2020-06-19 | 首钢集团有限公司 | Device and method for detecting blockage of refractory material in steelmaking continuous casting process |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6340655A (en) * | 1986-08-06 | 1988-02-22 | Nippon Kokan Kk <Nkk> | Continuous casting method for molten metal |
| JP2000084647A (en) * | 1998-09-11 | 2000-03-28 | Nippon Steel Corp | Method for blowing gas into upper nozzle in tundish |
| DE102004057381A1 (en) * | 2004-11-26 | 2006-06-01 | Heraeus Electro-Nite International N.V. | Method for controlling the flow and bottom outlet for a metallurgical vessel |
| KR20080113771A (en) * | 2007-06-26 | 2008-12-31 | 주식회사 포스코 | Apparatus for preventing from nozzle clogging, apparatus for continuous casting having the same, method for preventing from nozzle clogging and continuous casting method using it |
| KR101400045B1 (en) * | 2012-04-26 | 2014-05-30 | 현대제철 주식회사 | Method for forecasting possibility of additional continuous-continuous casting on continuous casting process |
| CN203992373U (en) * | 2014-08-19 | 2014-12-10 | 武汉钢铁(集团)公司 | A kind of continuous casting tundish that can detect online filling pipe end obstruction |
| CN106955984B (en) * | 2016-01-08 | 2019-04-23 | 宝山钢铁股份有限公司 | Handle the autocontrol method of continuous casting channel blockage |
| CN207447340U (en) * | 2017-11-01 | 2018-06-05 | 维苏威高级陶瓷(中国)有限公司 | A kind of netted ar gas passage stopper |
-
2020
- 2020-09-30 CN CN202011054608.4A patent/CN112157240B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2521462A1 (en) * | 1982-02-15 | 1983-08-19 | Poncet Pierre | Metal feed equipment for continuous casting - includes stopper extension creating back pressure in immersion nozzle |
| EP0320481A1 (en) * | 1987-11-25 | 1989-06-14 | Vesuvius International Corporation | Gas permeable stopper rod |
| CN103451349A (en) * | 2013-08-16 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Control method for preventing nozzle clogging in casting process of ultra-low carbon-aluminium deoxidized molten steel |
| CN106881457A (en) * | 2017-03-28 | 2017-06-23 | 马鞍山钢铁股份有限公司 | Molten steel pours device and part is sealed with argon and the method that part carries out argon envelope is sealed using argon |
| CN111308574A (en) * | 2020-02-12 | 2020-06-19 | 首钢集团有限公司 | Device and method for detecting blockage of refractory material in steelmaking continuous casting process |
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