JPH10193053A - Method and device for detecting abnormality of immersion nozzle - Google Patents
Method and device for detecting abnormality of immersion nozzleInfo
- Publication number
- JPH10193053A JPH10193053A JP538497A JP538497A JPH10193053A JP H10193053 A JPH10193053 A JP H10193053A JP 538497 A JP538497 A JP 538497A JP 538497 A JP538497 A JP 538497A JP H10193053 A JPH10193053 A JP H10193053A
- Authority
- JP
- Japan
- Prior art keywords
- immersion nozzle
- level
- molten metal
- abnormality
- amplitude
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、連続鋳造における
タンディッシュに設置されてモールド内に浸漬される浸
漬ノズルの折損・孔あき等の異常をオンラインで自動検
出する異常検出方法およびこの方法を実施するための異
常検出装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality detection method for automatically detecting on-line abnormalities such as breakage and perforation of an immersion nozzle installed in a tundish and immersed in a mold in continuous casting, and to implement this method. The present invention relates to an abnormality detection device for performing the operation.
【０００２】[0002]
【従来の技術】連続鋳造においては、取鍋内の溶湯を中
間鍋としてのタンディッシュを介してモールド内に鋳込
んでおり、タンディッシュからモールド内への溶湯の注
入には、モールド内溶湯に下部が浸漬される浸漬ノズル
が採用されている。この浸漬ノズルは、タンディッシュ
からモールド内に注入される溶湯を大気から遮断するこ
とによる溶湯の酸化防止、あるいはモールド内の溶湯流
動の適正化による溶湯中介在物の減少等により、鋳片品
質の安定化に寄与している。2. Description of the Related Art In continuous casting, a molten metal in a ladle is cast into a mold through a tundish as an intermediate pan, and the molten metal is poured from the tundish into the mold by melting the molten metal in the mold. An immersion nozzle whose lower part is immersed is employed. This immersion nozzle prevents the oxidization of the molten metal by blocking the molten metal injected from the tundish into the mold from the atmosphere, or reduces the inclusions in the molten metal by optimizing the flow of the molten metal in the mold. It contributes to stabilization.
【０００３】このような浸漬ノズルに、連続鋳造中、折
損・孔あき等の異常が発生すると、大気による溶湯の酸
化やモールド内溶湯流動の変化により、鋳片の品質は著
しく損なわれ、また溶湯流が凝固シェルの生成を阻害す
る方向へ変化した場合には、ブレークアウトを引き起こ
す等、操業へ与える影響も大きい。If an abnormality such as breakage or perforation occurs in such an immersion nozzle during continuous casting, the quality of the cast slab is remarkably impaired due to oxidation of the molten metal by air and changes in the flow of molten metal in the mold. If the flow changes in a direction that inhibits the formation of a solidified shell, it has a large effect on operations, such as causing breakout.
【０００４】従来においては、ＩＴＶ等により浸漬ノズ
ル回りやモールド内を目視観察して異常の判定をしてい
たが、このような方法では、浸漬ノズルの極小さなクラ
ック等に対しては、ＩＴＶを通した目視では異常の判定
が困難なものは検出できず、従って鋳片の大量品質不良
の発生といった品質管理上の問題が生じていた。さら
に、目視で判定し得る異常の程度は、概して、浸漬ノズ
ルの先端欠落等の大きなトラブルに限られるため、異常
認識のタイミングの遅れによりブレークアウト等の操業
トラブルを回避することが困難である等、操業上の問題
があった。加えて、連続鋳造中、絶えず人間が異常監視
をすることは肉体的負荷が大きく、作業環境上の問題も
あった。Conventionally, an abnormality is determined by visually observing the vicinity of the immersion nozzle or the inside of the mold using an ITV or the like. However, in such a method, the ITV is applied to an extremely small crack or the like of the immersion nozzle. If it is difficult to judge abnormalities by visual inspection, it cannot be detected, and therefore, there has been a problem in quality control such as occurrence of mass quality defect of slab. Furthermore, since the degree of abnormality that can be visually determined is generally limited to major troubles such as a missing tip of the immersion nozzle, it is difficult to avoid operation troubles such as breakout due to a delay in the timing of abnormality recognition. , There was an operational problem. In addition, the continuous monitoring of abnormalities by humans during continuous casting has a large physical load, and there is also a problem in the working environment.
【０００５】このような問題点を解消するために、連続
鋳造中にタンディッシュの浸漬ノズルの折損を自動的に
検出することのできる浸漬ノズル折損検出装置（実開昭
５７−１７６４５５号公報）が提案されている。この検
出装置では、図３に示すように、先端が閉塞された圧力
気体管５０を浸漬ノズル２のノズル本体耐火物内に上部
位置から下部吐出口２ａの下方位置まで配設し、この圧
力気体管５０に不活性ガスＧを供給して背圧を圧力検出
器５１で検出し、折損判定器５２により前記背圧が設定
値を下回ると浸漬ノズル２の折損と判定している。[0005] In order to solve such a problem, there is provided an immersion nozzle breakage detection device (Japanese Utility Model Laid-Open No. 57-176455) capable of automatically detecting breakage of a tundish immersion nozzle during continuous casting. Proposed. In this detection device, as shown in FIG. 3, a pressure gas pipe 50 having a closed end is disposed in the nozzle body refractory of the immersion nozzle 2 from the upper position to the lower position of the lower discharge port 2a. The inert gas G is supplied to the pipe 50, and the back pressure is detected by the pressure detector 51. When the back pressure falls below the set value, the breakage judging device 52 judges that the immersion nozzle 2 is broken.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、前述の
ような圧力気体による方法では、浸漬ノズル本体耐火物
内に配管を設置しなければならず、浸漬ノズルの単体製
造コストが高くなるという問題がある。さらに、浸漬ノ
ズル内に、本来不要である加工を施すため、構造上かえ
って折損し易くなる等の問題もあり、実用的とは言い難
い。However, in the above-described method using a pressurized gas, there is a problem in that a pipe must be installed in the refractory of the immersion nozzle body, and the cost of manufacturing the immersion nozzle alone increases. . Furthermore, since processing that is originally unnecessary is performed in the immersion nozzle, there is a problem that the structure is easily broken rather than the structure, and it is hardly practical.
【０００７】本発明は、前述のような問題点を解消する
ためになされたもので、その目的は、浸漬ノズル自体に
は何ら加工を施さずに、比較的簡単な機器構成により、
浸漬ノズルの折損・孔あき等の異常を早期に、かつ確実
に自動検出することができ、浸漬ノズル異常による鋳片
の大量品質不良やブレークアウト等の操業トラブルを未
然に防止することができる浸漬ノズルの異常検出方法お
よび装置を提供することにある。The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a relatively simple device configuration without performing any processing on the immersion nozzle itself.
An immersion that can automatically and reliably detect abnormalities such as breakage and holes in the immersion nozzle early and reliably, and prevent operational problems such as poor quality of slabs due to abnormal immersion nozzles and breakouts. An object of the present invention is to provide a nozzle abnormality detection method and apparatus.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明では、連続鋳造中、浸漬ノズルに折損・孔あ
き等の異常が発生した時、浸漬ノズルの折損部または孔
あき部から吸い込まれた大気の影響によりモールド内メ
ニスカス湯面レベルが著しく乱れることに着目し、この
湯面レベル変動を的確に検出して浸漬ノズルの異常を早
期に確実に検出するようにしたものである。In order to achieve the above object, according to the present invention, when an abnormality such as breakage or perforation occurs in an immersion nozzle during continuous casting, suction is performed from a broken portion or a perforated portion of the immersion nozzle. Focusing on the fact that the level of the meniscus level in the mold is remarkably disturbed by the influence of the ambient air, the level change of the level is accurately detected, and the abnormality of the immersion nozzle is reliably detected at an early stage.
【０００９】本発明の浸漬ノズルの異常検出方法は、連
続鋳造用タンディッシュに設けられてモールド内溶湯に
浸漬される浸漬ノズルの異常を検出する検出方法であ
り、前記浸漬ノズル近傍におけるモールド内湯面レベル
を検出し、検出された湯面レベルの変動を周波数解析
し、湯面レベルの変動周波数の変化（主となる周波数成
分の変化、あるいは周波数成分の振幅の変化）から浸漬
ノズルの異常を判定することを特徴とする。An abnormality detection method for an immersion nozzle according to the present invention is a method for detecting an abnormality in an immersion nozzle provided in a tundish for continuous casting and immersed in a molten metal in a mold. Detects the level, analyzes the detected fluctuations in the level of the molten steel level, and determines the abnormality of the immersion nozzle based on the change in the fluctuation frequency of the molten metal level (change of the main frequency component or change of the amplitude of the frequency component) It is characterized by doing.
【００１０】本発明の浸漬ノズルの異常検出装置は、連
続鋳造用タンディッシュに設けられてモールド内溶湯に
浸漬される浸漬ノズルの異常を検出する検出装置であ
り、前記浸漬ノズル近傍におけるモールド内湯面レベル
を検出する湯面レベルセンサーと、この湯面レベルセン
サーからの湯面レベル信号を取り込み、湯面レベルの変
動を周波数解析し、湯面レベルの変動周波数の変化（主
となる周波数成分の変化、あるいは周波数成分の振幅の
変化）から浸漬ノズルの異常を判定するコンピューター
を備えていることを特徴とする。An apparatus for detecting an abnormality of a dipping nozzle according to the present invention is a detection apparatus for detecting an abnormality of a dipping nozzle provided in a tundish for continuous casting and dipped in a molten metal in a mold. A level sensor that detects the level and a level signal from this level sensor are taken in, the frequency of the level change is analyzed, and the frequency of the level change (change of main frequency component) Or a change in the amplitude of the frequency component) to determine the abnormality of the immersion nozzle.
【００１１】以上のような構成において、浸漬ノズル近
傍に設置された湯面レベルセンサーにより、モールド内
メニスカスの湯面レベル挙動が検出され、コンピュータ
ーにおけるリアルタイム処理により、前記湯面レベル信
号が周波数解析され、この周波数解析結果から各周波数
成分の振幅が求められ、浸漬ノズル異常時に顕著となる
高周波成分が検出され、この高周波成分の振幅が所定の
値より大きくなると、浸漬ノズルの異常と判定される。
高周波成分の検出のみ、あるいは正常時と異常時の周波
数成分の振幅の比較のみでも、異常の判定を行えるが、
両者を組み合わせ、高周波成分を検出すると共に、この
高周波成分の振幅を所定の値と比較するのが好ましい。[0011] In the above-described structure, the level sensor installed near the immersion nozzle detects the level behavior of the meniscus in the mold, and the frequency of the level signal is analyzed by a computer in real time. Then, the amplitude of each frequency component is obtained from the frequency analysis result, and a high-frequency component that becomes conspicuous when the immersion nozzle is abnormal is detected. When the amplitude of the high-frequency component becomes larger than a predetermined value, it is determined that the immersion nozzle is abnormal.
Abnormality can be determined only by detecting high-frequency components or comparing only the amplitudes of the frequency components at normal and abnormal times.
It is preferable to combine the two and detect the high frequency component, and compare the amplitude of the high frequency component with a predetermined value.
【００１２】例えば、図２に示すように、浸漬ノズルに
異常がない場合、湯面レベル変動の変動周波数成分は
０．０５Ｈｚ未満の低周波成分が主体であり、変動振幅
も小さい。一方、浸漬ノズルの異常により、浸漬ノズル
内に大気の吸い込みが発生すると、吸い込まれた大気の
影響により、モールド内の溶湯流動が変化する。その
際、前述の湯面レベル変動の変動周波数成分は０．１Ｈ
ｚ前後の高周波成分が顕著となる。また、変動振幅も増
大する。従って、浸漬ノズル正常時に顕著となる低周波
数成分の振幅と、浸漬ノズル異常時に顕著となる高周波
数成分の振幅を比較し、その変化が大きい場合に浸漬ノ
ズルの異常と判定することにより、浸漬ノズルの異常を
確実に把握することができる。以上により、鋳片の大量
品質不良やブレークアウト等の操業トラブルが未然に防
止されることになる。For example, as shown in FIG. 2, when there is no abnormality in the immersion nozzle, the fluctuation frequency component of the level change is mainly a low frequency component of less than 0.05 Hz, and the fluctuation amplitude is small. On the other hand, if air is sucked into the immersion nozzle due to the abnormality of the immersion nozzle, the flow of the molten metal in the mold changes due to the influence of the sucked air. At this time, the fluctuation frequency component of the above-mentioned bath level fluctuation is 0.1H
High frequency components around z become remarkable. Further, the fluctuation amplitude also increases. Therefore, by comparing the amplitude of the low-frequency component that is conspicuous when the immersion nozzle is normal and the amplitude of the high-frequency component that is conspicuous when the immersion nozzle is abnormal, if the change is large, it is determined that the immersion nozzle is abnormal. Abnormality can be grasped reliably. As described above, operational troubles such as poor quality of cast slabs and breakout can be prevented beforehand.
【００１３】[0013]
【発明の実施の形態】以下、本発明を図示する一実施例
に基づいて詳細に説明する。これは連続鋳造における浸
漬ノズルの折損・孔あきの異常を検出する場合に適用し
た例である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. This is an example applied to a case of detecting breakage and hole abnormality of an immersion nozzle in continuous casting.
【００１４】図１に、本発明の異常検出方法を実施する
ための装置を示し、図２に浸漬ノズルの正常時と異常時
の湯面変動周波数分布を示す。FIG. 1 shows an apparatus for carrying out the abnormality detection method of the present invention, and FIG. 2 shows the distribution of the molten metal surface fluctuation frequency when the immersion nozzle is normal and when it is abnormal.
【００１５】図１において、図示しない取鍋内の溶鋼が
中間鍋としてのタンディッシュ１内に注入され、タンデ
ィッシュ１内の溶鋼が浸漬ノズル２を介してモールド３
内に注入される。浸漬ノズル２の下端部の側壁には吐出
口２ａが設けられており、モールド内の溶鋼４内に浸漬
された吐出口２ａから溶鋼がほぼ水平に吐出される。In FIG. 1, molten steel in a ladle (not shown) is poured into a tundish 1 as an intermediate pan, and the molten steel in the tundish 1 is passed through a dipping nozzle 2 to form a mold 3.
Injected into. A discharge port 2a is provided in a side wall at a lower end portion of the immersion nozzle 2, and molten steel is discharged substantially horizontally from the discharge port 2a immersed in the molten steel 4 in the mold.
【００１６】なお、モールド内の溶鋼４の表面は、空気
酸化抑制・介在物捕捉・鋳型内面潤滑などを行う湯面被
覆パウダーにより覆われている。Incidentally, the surface of the molten steel 4 in the mold is covered with a powder coating powder for suppressing air oxidation, trapping inclusions and lubricating the inner surface of the mold.
【００１７】モールド３内の溶鋼４の湯面レベルは、浸
漬ノズル２の近傍に設置された湯面レベルセンサー５に
より検出され、その検出信号がアンプ６を介して解析用
コンピューター７に出力され、解析用コンピューター７
でリアルタイム処理される。The molten metal level of the molten steel 4 in the mold 3 is detected by a molten metal level sensor 5 installed near the immersion nozzle 2, and a detection signal is output to an analysis computer 7 via an amplifier 6. Analysis computer 7
Is processed in real time.
【００１８】湯面レベルセンサー５は、導電体の検出に
一般的に用いられている渦流式レベル計を使用する。タ
ンディッシュからの注入量を調整して湯面レベルを一定
に保つ湯面レベル制御に、湯面レベルセンサーが使用さ
れる場合には、兼用することもできる。As the molten metal level sensor 5, an eddy current level meter generally used for detecting a conductor is used. If a level sensor is used for level control to maintain a constant level by adjusting the injection amount from the tundish, the level can also be used.
【００１９】使用した渦流式レベル計の検出スパンは１
５０ｍｍであり、本実施例では、湯面から湯面レベルセ
ンサー５の先端までの距離を９０ｍｍとすることで、検
出精度を保持しつつ、かつ湯面からの熱影響が最小とな
るように配慮した。また、渦流式レベル計の水平方向の
設置位置が浸漬ノズル２から遠過ぎると、異常検出の精
度が悪化し、逆に浸漬ノズル２に近過ぎると、浸漬ノズ
ル内の溶鋼流の影響によりレベル計の感度を低下させる
ため、渦流式レベル計は、その中心から浸漬ノズル２の
中心までの距離が２００〜３００ｍｍとなるように設置
されるのが望ましい。本実施例では、この点を考慮し
て、レベル計中心が浸漬ノズル２の中心から２５０ｍｍ
の距離に位置するように湯面レベルセンサー５を設置し
た。The detection span of the eddy current level meter used is 1
In this embodiment, the distance from the molten metal surface to the tip of the molten metal level sensor 5 is set to 90 mm, so that the detection accuracy is maintained and the thermal influence from the molten metal surface is minimized. did. If the horizontal installation position of the eddy current level meter is too far from the immersion nozzle 2, the accuracy of abnormality detection deteriorates, and if it is too close to the immersion nozzle 2, the level meter is affected by the flow of molten steel in the immersion nozzle. In order to lower the sensitivity of the eddy current level meter, it is desirable that the distance from the center of the eddy current level meter to the center of the immersion nozzle 2 be 200 to 300 mm. In this embodiment, in consideration of this point, the center of the level meter is 250 mm from the center of the immersion nozzle 2.
The water level sensor 5 was installed so as to be located at a distance of.
【００２０】解析用コンピューター７においては、検出
された湯面レベル信号を周波数解析し、先ずこの周波数
解析結果から各周波数成分（０．００９６〜５Ｈｚ）の
振幅を求め（図２参照）、次に隣り合った５つの周波数
成分振幅を平均化する。さらに、得られた周波数分布に
対し、浸漬ノズルに異常がない場合に顕著となる周波数
範囲（０．０２９〜０．０４９Ｈｚ）から計算される低
周波成分振幅平均値ｙ1 と、浸漬ノズルに異常が生じた
場合に顕著になる周波数範囲（０．０５９〜０．１２７
Ｈｚ）から計算される高周波成分振幅平均値ｙ2 をそれ
ぞれ算出し、これを次の（１）式に代入することによ
り、浸漬ノズルの異常を判定する。In the analysis computer 7, the detected level signal is frequency-analyzed, and the amplitude of each frequency component (0.0096 to 5 Hz) is obtained from the frequency analysis result (see FIG. 2). The average of five adjacent frequency component amplitudes is averaged. Further, the obtained frequency distribution, the low-frequency component amplitude average value y 1 is calculated from the remarkable become frequency range (0.029~0.049Hz) If there is no abnormality in the immersion nozzle, abnormal immersion nozzle Frequency range (0.059 to 0.127)
Hz), the average of the high-frequency component amplitudes y 2 calculated from each of the calculated values is substituted into the following equation (1) to determine the abnormality of the immersion nozzle.
【００２１】 α（％）＝（１−ｙ1 ／ｙ2 ）×１００ ……（１） 本実施例では、α値を約１０秒毎に算出しており、αが
２０％以上で、かつ湯面変動の標準偏差が３ｍｍ以上の
時、浸漬ノズルに異常が発生したと判定し、中央操作室
のＣＲＴ８の画面を介して警報を出力する。警報が出力
された場合、当該浸漬ノズル２での鋳造をいち早く中止
することによって、鋳片の大量品質不良やブレークアウ
ト等の操業トラブルを未然に防ぐことができる。Α (%) = (1−y 1 / y 2 ) × 100 (1) In this embodiment, the α value is calculated about every 10 seconds, and α is 20% or more, and When the standard deviation of the level change is 3 mm or more, it is determined that an abnormality has occurred in the immersion nozzle, and an alarm is output via the screen of the CRT 8 in the central operation room. When an alarm is output, by immediately stopping the casting with the immersion nozzle 2, it is possible to prevent operational troubles such as poor mass quality of cast slabs and breakouts.
【００２２】なお、判定方法は前述の（１）式を用いた
方法に限定されることなく、その他の周波数成分あるい
は周波数成分の振幅を比較する判定方法を採用できるこ
とはいうまでもない。また、以上は浸漬ノズルの折損・
孔あき等による異常検出に適用した例であるが、これに
限定されることなく、例えば浸漬ノズルの閉塞防止用に
浸漬ノズル内に吹き込まれているアルゴンガスの流量異
常検出用に使用することもできる。The determination method is not limited to the method using the above-described equation (1), and it goes without saying that another frequency component or a determination method for comparing the amplitudes of the frequency components can be adopted. In addition, the above is the breakage of the immersion nozzle
Although this example is applied to abnormality detection due to a hole or the like, the present invention is not limited to this, and may be used, for example, to detect an abnormality in the flow rate of argon gas blown into the immersion nozzle in order to prevent blockage of the immersion nozzle. it can.
【００２３】[0023]
【発明の効果】前述の通り、本発明は、浸漬ノズル近傍
におけるモールド内湯面レベルを湯面レベルセンサーで
検出し、検出された湯面レベル変動をリアルタイムで解
析し、湯面レベルの変動周波数の変化から浸漬ノズルの
異常を判定するようにしたため、次のような効果が得ら
れる。As described above, according to the present invention, the level in the mold near the immersion nozzle is detected by the level sensor, and the detected level fluctuation is analyzed in real time. Since the abnormality of the immersion nozzle is determined from the change, the following effects can be obtained.
【００２４】(1) 浸漬ノズルの折損・孔あき等の異常を
早期に、かつ確実に、オンラインで自動検出することが
でき、鋳片の大量品質不良やブレークアウト等の操業ト
ラブルを未然に防止することができる。また、目視によ
る監視が不要となり、省力化を図ることができる。(1) Abnormalities such as breakage and perforation of the immersion nozzle can be automatically detected online at an early stage and reliably, thereby preventing large-scale defects in slabs and operational troubles such as breakout. can do. In addition, visual monitoring is not required, and labor can be saved.
【００２５】(2) 浸漬ノズル自体への加工が何ら不要で
あるため、耐火物コストの悪化の懸念もなく、また比較
的簡単な機器構成により浸漬ノズルの異常を検出できる
ため、コストの低減を図ることができる。また、浸漬ノ
ズルの強度が低下する心配もない。(2) Since there is no need to process the immersion nozzle itself, there is no concern that the cost of the refractory deteriorates. Further, since the abnormality of the immersion nozzle can be detected with a relatively simple device configuration, the cost can be reduced. Can be planned. Further, there is no fear that the strength of the immersion nozzle is reduced.
【図１】本発明に係る浸漬ノズルの異常検出方法を実施
するための装置を示す概略図である。FIG. 1 is a schematic view showing an apparatus for implementing a method for detecting an abnormality of a submerged nozzle according to the present invention.
【図２】本発明における湯面変動周波数成分の振幅分布
を示すグラフである。FIG. 2 is a graph showing the amplitude distribution of the level fluctuation frequency component in the present invention.
【図３】従来の圧力気体による浸漬ノズル折損検出装置
を示す概略図である。FIG. 3 is a schematic view showing a conventional apparatus for detecting breakage of a submerged nozzle by pressurized gas.
１…タンディッシュ ２…浸漬ノズル ２ａ…吐出口 ３…モールド ４…溶鋼 ５…湯面レベルセンサー ６…アンプ ７…解析用コンピューター ８…ＣＲＴ DESCRIPTION OF SYMBOLS 1 ... Tundish 2 ... Immersion nozzle 2a ... Discharge port 3 ... Mold 4 ... Molten steel 5 ... Level sensor 6 ... Amplifier 7 ... Computer for analysis 8 ... CRT
Claims (2)
モールド内溶湯に浸漬される浸漬ノズルの異常を検出す
る検出方法であり、前記浸漬ノズル近傍におけるモール
ド内湯面レベルを検出し、検出された湯面レベルの変動
を周波数解析し、湯面レベルの変動周波数の変化から浸
漬ノズルの異常を判定することを特徴とする浸漬ノズル
の異常検出方法。1. A detection method for detecting an abnormality of an immersion nozzle provided in a tundish for continuous casting and immersed in a molten metal in a mold, detecting a level of a molten metal level in the vicinity of the immersion nozzle and detecting the detected molten metal. An immersion nozzle abnormality detection method, characterized in that frequency analysis of surface level fluctuations is performed and abnormality of the immersion nozzles is determined from changes in the fluctuation level of the molten metal level.
モールド内溶湯に浸漬される浸漬ノズルの異常を検出す
る検出装置であり、前記浸漬ノズル近傍におけるモール
ド内湯面レベルを検出する湯面レベルセンサーと、この
湯面レベルセンサーからの湯面レベル信号を取り込み、
湯面レベルの変動を周波数解析し、湯面レベルの変動周
波数の変化から浸漬ノズルの異常を判定するコンピュー
ターを備えていることを特徴とする浸漬ノズルの異常検
出装置。2. A detection device for detecting an abnormality of a dipping nozzle provided in a tundish for continuous casting and immersed in a molten metal in a mold, and a level sensor for detecting a level of a level in the mold near the dipping nozzle. , Take in the level signal from this level sensor,
An abnormality detection device for an immersion nozzle, comprising: a computer that analyzes a frequency of a variation in the level of the molten metal and determines an abnormality in the immersion nozzle from a change in the frequency of variation in the level of the molten metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP538497A JPH10193053A (en) | 1997-01-16 | 1997-01-16 | Method and device for detecting abnormality of immersion nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP538497A JPH10193053A (en) | 1997-01-16 | 1997-01-16 | Method and device for detecting abnormality of immersion nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10193053A true JPH10193053A (en) | 1998-07-28 |
Family
ID=11609685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP538497A Pending JPH10193053A (en) | 1997-01-16 | 1997-01-16 | Method and device for detecting abnormality of immersion nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10193053A (en) |
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1997
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|---|---|---|---|---|
| WO2001079588A3 (en) * | 2000-04-18 | 2002-06-06 | Corus Uk Ltd | Detection of roller damage and/or misalignment in continuous casting of metals |
| JP2004500987A (en) * | 2000-04-18 | 2004-01-15 | コラス ユーケイ リミテッド | Detection of roller damage and / or misalignment in continuous casting of metal |
| US6845286B2 (en) | 2000-04-18 | 2005-01-18 | Corus Uk Limited | Detection of roller damage and/or misalignment in continuous casting of metals |
| KR100761575B1 (en) * | 2000-04-18 | 2007-09-27 | 코러스 유케이 리미티드 | Detection of roller damage and/or misalignment in continuous casting of metals |
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| WO2001079588A2 (en) * | 2000-04-18 | 2001-10-25 | Corus Uk Limited | Detection of roller damage and/or misalignment in continuous casting of metals |
| JP2007098456A (en) * | 2005-10-07 | 2007-04-19 | Kobe Steel Ltd | Method for continuously casting slab |
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| CN103596713A (en) * | 2011-09-28 | 2014-02-19 | 现代制铁株式会社 | Method for predicting number of continuous casting processes during continuous casting |
| JP2014515318A (en) * | 2011-09-28 | 2014-06-30 | ヒュンダイ スチール カンパニー | Prediction method of continuous casting number in continuous casting |
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