JPH06122056A - Method for detecting level of molten metal in high frequency electromagnetic field casting die - Google Patents
Method for detecting level of molten metal in high frequency electromagnetic field casting dieInfo
- Publication number
- JPH06122056A JPH06122056A JP27585092A JP27585092A JPH06122056A JP H06122056 A JPH06122056 A JP H06122056A JP 27585092 A JP27585092 A JP 27585092A JP 27585092 A JP27585092 A JP 27585092A JP H06122056 A JPH06122056 A JP H06122056A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- level
- frequency electromagnetic
- electromagnetic field
- high frequency
- 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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Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、連続鋳造設備等におい
て高周波電磁場中の鋳型内溶融金属の湯面レベルを検出
する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the level of molten metal in a mold under a high frequency electromagnetic field in a continuous casting facility or the like.
【０００２】[0002]
【従来の技術】図７は従来の渦流式溶鋼湯面レベル計を
示す概略図であり、この図７に示すように、そのレベル
計１は、一次コイル２と、二次コイル３ａ，３ｂとから
構成されている。このようなレベル計１により、図７に
示す鋳型４内の溶鋼５の湯面レベルｈを検出する際に
は、レベル計１を溶鋼５の湯面上方に配置する。2. Description of the Related Art FIG. 7 is a schematic view showing a conventional vortex flow type molten steel level gauge. As shown in FIG. 7, the level gauge 1 includes a primary coil 2 and secondary coils 3a and 3b. It consists of When detecting the molten metal level 5 of the molten steel 5 in the mold 4 shown in FIG. 7 with such a level meter 1, the level meter 1 is arranged above the molten metal 5 molten metal level.
【０００３】レベル計１において、一次コイル２には強
制電流が流され、湯面に対し垂直方向の磁場を作る。電
磁誘導作用により湯面に渦電流が発生し、この渦電流が
作る磁場のため、二次コイル３ａ，３ｂを通る磁場は小
さくなる。ここで、湯面レベルｈが、二次コイル３ａ，
３ｂに近い距離にある程、二次コイル３ａ，３ｂを通る
磁場は小さくなり、この磁束に比例した二次コイル３
ａ，３ｂの差分電圧(Ｖ1−Ｖ2)により湯面レベルｈを検
出している。In the level meter 1, a forced current is passed through the primary coil 2 to create a magnetic field perpendicular to the molten metal surface. An eddy current is generated on the molten metal surface by the electromagnetic induction action, and the magnetic field created by this eddy current reduces the magnetic field passing through the secondary coils 3a and 3b. Here, the molten metal level h is the secondary coil 3a,
The closer to 3b, the smaller the magnetic field passing through the secondary coils 3a and 3b, and the secondary coil 3 proportional to this magnetic flux.
The molten metal level h is detected by the difference voltage (V 1 −V 2 ) between a and 3b.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来の渦流式のレベル計１を、例えば、鋳型外周にソ
レノイドコイルを配置した電磁界鋳型に適用した場合、
二次コイル３ａ，３ｂを鎖交する磁束が、鋳型外周のソ
レノイドコイルにより作られる磁場の影響を受け、レベ
ル検出が不可能になるという課題があった。However, when the above-mentioned conventional vortex level meter 1 is applied to, for example, an electromagnetic field mold in which a solenoid coil is arranged on the outer periphery of the mold,
The magnetic flux that links the secondary coils 3a and 3b is affected by the magnetic field generated by the solenoid coil on the outer periphery of the mold, and there is a problem that the level cannot be detected.
【０００５】本発明は、このような課題を解決しようと
するもので、高周波電磁界鋳型内の湯面レベルを確実に
検出できるようにした方法を提供することを目的とす
る。The present invention is intended to solve such problems, and an object thereof is to provide a method capable of surely detecting the molten metal level in a high frequency electromagnetic field mold.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明の高周波電磁界鋳型における湯面レベル検出
方法は、高周波電磁場を発生するためのソレノイドコイ
ルを外周に配置した高周波電磁界鋳型内における溶融金
属の湯面レベルを検出する方法であって、前記湯面レベ
ルの変化に応じて生じる前記ソレノイドコイルのインダ
クタンス変動分もしくは電流，電圧，力率，インピーダ
ンスを測定し、測定されたインダクタンス変動分もしく
は電流，電圧，力率，インピーダンスに基づいて前記湯
面レベルを得ることを特徴としている。In order to achieve the above object, a molten metal level detecting method in a high frequency electromagnetic field mold according to the present invention is a high frequency electromagnetic field mold in which a solenoid coil for generating a high frequency electromagnetic field is arranged on the outer periphery. Is a method for detecting the level of molten metal in a chamber, in which the inductance variation of the solenoid coil or the current, voltage, power factor and impedance that occur in response to changes in the level of molten metal are measured, and the measured inductance is measured. It is characterized in that the level of the molten metal is obtained based on the variation or the current, voltage, power factor and impedance.
【０００７】[0007]
【作用】上述した本発明の高周波電磁界鋳型における湯
面レベル検出方法では、湯面レベルの変化に応じてソレ
ノイドコイル自体に生じるインダクタンス変動もしくは
電流，電圧，力率，インピーダンスを測定することによ
り、従来のごとく検出用に一次コイルを使用することな
く、湯面レベルを検出することができる。In the method for detecting the molten metal level in the high-frequency electromagnetic field mold of the present invention described above, by measuring the inductance variation or the current, voltage, power factor, and impedance generated in the solenoid coil itself according to the variation of the molten metal level, The level of the molten metal can be detected without using the primary coil for the detection as in the conventional case.
【０００８】[0008]
【実施例】以下、図面により本発明の実施例について説
明すると、図１は本発明の第１実施例としての高周波電
磁界鋳型における湯面レベル検出方法を適用されたレベ
ル測定回路を示す構成図、図２は本実施例の高周波電磁
界鋳型を模式的に示す断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a level measuring circuit to which a molten metal level detecting method in a high frequency electromagnetic field mold is applied as a first embodiment of the present invention. FIG. 2 is a sectional view schematically showing the high frequency electromagnetic field mold of this example.
【０００９】図２に示すように、本実施例を適用される
高周波電磁界鋳型６の外周には、高周波電磁場を発生す
るためのソレノイドコイル７が配置されており、本実施
例では、このような鋳型６内の溶鋼等の溶融金属８の湯
面レベルを検出するために、図１に示すようなレベル測
定回路を、ソレノイドコイル７への電力供給系にそなえ
ている。As shown in FIG. 2, a solenoid coil 7 for generating a high frequency electromagnetic field is arranged on the outer periphery of the high frequency electromagnetic field mold 6 to which the present embodiment is applied. In order to detect the level of the molten metal 8 such as molten steel in the mold 6, a level measuring circuit as shown in FIG. 1 is provided in the power supply system to the solenoid coil 7.
【００１０】図１において、９はソレノイドコイル７に
電力を供給する交流電源、１０はソレノイドコイル７の
電圧Ｅを検出する電圧計、１１はソレノイドコイル７の
電流を検出する電流計、１２は力率を検出する力率計、
１３はこれらの電圧計１０，電流計１１，力率計１２に
よる検出結果に基づいてソレノイドコイル７のインダク
タンスＬ(またはインピーダンスＺ)を演算するインダク
タンス(またはインピーダンス)演算部、１４はこのイン
ダクタンス(またはインピーダンス)演算部１３にて演算
されたソレノイドコイル７のインダクタンスＬ(または
インピーダンスＺ)の変動分から図４にて後述する関係
に基づいて鋳型６内の溶融金属８の湯面レベルを算出す
るレベル演算部である。In FIG. 1, 9 is an AC power supply for supplying power to the solenoid coil 7, 10 is a voltmeter for detecting the voltage E of the solenoid coil 7, 11 is an ammeter for detecting the current of the solenoid coil 7, and 12 is a force. Power factor meter to detect the rate,
Reference numeral 13 is an inductance (or impedance) calculator that calculates the inductance L (or impedance Z) of the solenoid coil 7 based on the detection results of the voltmeter 10, the ammeter 11, and the power factor meter 12, and 14 is the inductance (or impedance). Level calculation for calculating the molten metal 8 level in the mold 6 from the variation of the inductance L (or impedance Z) of the solenoid coil 7 calculated by the impedance calculation unit 13 based on the relationship described later in FIG. It is a department.
【００１１】ここで、高周波電磁界鋳型６の内部の溶融
金属８の湯面レベル変動と、ソレノイドコイル７のイン
ダクタンスＬ(またはインピーダンスＺ)の変動との関係
について、図３，図４により説明する。図３は、図２に
示した鋳型６および溶融金属８の電気的な関係を図示す
る等価回路であり、この図３において、Ｅはコイル電圧
(Ｖ)、ｉ1はコイル電流(Ａ)、ｉ2は溶融金属８内の渦電
流(Ａ)、Ｒ1はコイル抵抗(Ω)、Ｒ2は溶融金属８の抵抗
(Ω)、Ｌ1はコイル自己インダクタンス(Ｈ)、Ｌ2は溶融
金属８の自己インダクタンス(Ｈ)、Ｍはソレノイドコイ
ル７と溶融金属８との間の相互インダクタンス(Ｈ)であ
る。Here, the relationship between the level variation of the molten metal 8 inside the high frequency electromagnetic field mold 6 and the variation of the inductance L (or impedance Z) of the solenoid coil 7 will be described with reference to FIGS. . FIG. 3 is an equivalent circuit illustrating the electrical relationship between the mold 6 and the molten metal 8 shown in FIG. 2, and in this FIG. 3, E is the coil voltage.
(V), i 1 is the coil current (A), i 2 is the eddy current in the molten metal 8 (A), R 1 is the coil resistance (Ω), R 2 is the resistance of the molten metal 8.
(Ω), L 1 is the coil self-inductance (H), L 2 is the self-inductance of the molten metal 8 (M), and M is the mutual inductance (H) between the solenoid coil 7 and the molten metal 8.
【００１２】図３に示す等価回路について、次の等式
(1)，(2)が成立する。For the equivalent circuit shown in FIG. 3, the following equation
(1) and (2) are established.
【００１３】 Ｒ1・ｉ1＋Ｌ1・(ｄｉ1／ｄｔ)＋Ｍ・(ｄｉ2／ｄｔ)＝Ｅ (1) Ｒ2・ｉ2＋Ｌ2・(ｄｉ2／ｄｔ)＋Ｍ・(ｄｉ1／ｄｔ)＝０ (2) これらの(1)，(2)式より、ソレノイドコイル７のインダ
クタンスＬは、次式(3)で表される。R 1 · i 1 + L 1 · (di 1 / dt) + M · (di 2 / dt) = E (1) R 2 · i 2 + L 2 · (di 2 / dt) + M · (di 1 / dt) = 0 (2) From these equations (1) and (2), the inductance L of the solenoid coil 7 is represented by the following equation (3).
【００１４】 Ｌ＝Ｌ1−Ｍ2／Ｌ2 (ただしＲ2＜＜Ｌ2と仮定) (3) この(3)式から、ソレノイドコイル７のインダクタンス
Ｌは、溶融金属８の電磁誘導作用によりＭ2／Ｌ2だけ減
少することが分かる。上記(3)式は、次式(4)のように書
き換えることができる。L = L 1 −M 2 / L 2 (assuming R 2 << L 2 ) (3) From the equation (3), the inductance L of the solenoid coil 7 is determined by the electromagnetic induction action of the molten metal 8. It can be seen that it decreases by M 2 / L 2 . The above equation (3) can be rewritten as the following equation (4).
【００１５】 Ｌ＝(£1４π2Ｎ2/ｌ1)・〔ａ1 2−£1ａ2 2Ｎ2ｌ2/(£2ｌ1)〕×10~7(Ｈ) (4) 上記(4)式中、ｌ1は外部ソレノイドコイル長さ(ｍ)、ｌ
2は溶融金属８の湯面レベル(ｍ)、ａ1は外部ソレノイド
コイル半径(ｍ)、ａ2は鋳型６の内周半径(ｍ)、Ｎは外
部ソレノイドコイル総巻数、£1，£2は所定係数であ
る。L = (£ 14 π 2 N 2 / l 1 ) × [a 1 2 − £ 1 a 2 2 N 2 l 2 / (£ 2 l 1 )] × 10 to 7 (H) (4) Above In formula (4), l 1 is the external solenoid coil length (m), l
2 is the level of molten metal 8 (m), a 1 is the radius of the outer solenoid coil (m), a 2 is the inner radius of the mold 6 (m), N is the total number of turns of the outer solenoid coil, £ 1 , £ 2 Is a predetermined coefficient.
【００１６】上述のような関係式から、溶融金属８の湯
面レベルｌ2が高くなると、係数£2が大きくなるため、
ソレノイドコイル７のインダクタンスＬと湯面レベルｌ
2との関係は、図４に示すようになる。From the relational expression as described above, the coefficient £ 2 increases as the molten metal level l 2 of the molten metal 8 increases.
Inductance L of solenoid coil 7 and molten metal level 1
The relationship with 2 is as shown in FIG.
【００１７】従って、図１に示すようなレベル測定回路
を用い、ソレノイドコイル７の電圧，電流，力率をそれ
ぞれ電圧計１０，電流計１１，力率計１２によって検出
し、各検出結果に基づいて、インダクタンス演算部１３
によりソレノイドコイル７のインダクタンスＬを演算し
て求め、そのインダクタンスＬから、図３に示す関係に
基づいてレベル演算部１４により鋳型６内の溶融金属８
の湯面レベルｌ2が算出されることになる。Therefore, using the level measuring circuit as shown in FIG. 1, the voltage, current and power factor of the solenoid coil 7 are detected by the voltmeter 10, the ammeter 11 and the power factor meter 12, respectively, and based on the respective detection results. And the inductance calculation unit 13
The inductance L of the solenoid coil 7 is calculated by using the inductance L, and the molten metal 8 in the mold 6 is calculated from the inductance L by the level calculator 14 based on the relationship shown in FIG.
The level 1 2 of the molten metal is calculated.
【００１８】次に、図５により本発明の第２実施例とし
ての高周波電磁界鋳型における湯面レベル検出方法につ
いて説明すると、図５はその方法を適用された高周波電
磁界鋳型を模式的に示す断面図である。この第２実施例
では、第１実施例において図３，図４により前述したよ
うに、溶融金属８の湯面レベル変動に伴うソレノイドコ
イル７のインダクタンスＬの変動を、鋳型６内の溶融金
属８の湯面上方に配置した検出用コイル１５によりこの
検出用コイル１５に生じる誘導電圧ｅによって測定して
いる。Next, referring to FIG. 5, a method for detecting a molten metal level in a high frequency electromagnetic field mold according to a second embodiment of the present invention will be described. FIG. 5 schematically shows a high frequency electromagnetic field mold to which the method is applied. FIG. In the second embodiment, as described above with reference to FIGS. 3 and 4 in the first embodiment, the fluctuation of the inductance L of the solenoid coil 7 due to the fluctuation of the molten metal 8 in the molten metal 8 is caused by the fluctuation of the molten metal 8 in the mold 6. Measurement is performed by the induced voltage e generated in the detection coil 15 by the detection coil 15 arranged above the molten metal surface.
【００１９】つまり、ソレノイドコイル７の作る磁場の
ため、溶融金属８および検出用コイル１５には誘導電流
が流れる。この誘導電流は、外部磁場を打ち消す方向に
磁束を作る。従って、誘導電流により検出用コイル１５
の磁束は減少する。即ち、これは、ソレノイドコイル７
のインダクタンスＬが小さくなることを意味する。検出
用コイル１５と溶融金属８の湯面レベルとの距離が小さ
くなる程、検出用コイル１５のインダクタンスは小さく
なる。これにより、検出用コイル１５のインダクタンス
または誘導電圧ｅを測定することにより、溶融金属８の
湯面レベルを検出することができる。That is, due to the magnetic field produced by the solenoid coil 7, an induced current flows through the molten metal 8 and the detection coil 15. This induced current creates a magnetic flux in a direction that cancels the external magnetic field. Therefore, the induced current causes the detection coil 15
Magnetic flux is reduced. That is, this is the solenoid coil 7
It means that the inductance L is reduced. The smaller the distance between the detection coil 15 and the molten metal 8 level, the smaller the inductance of the detection coil 15. Thus, the level of the molten metal 8 can be detected by measuring the inductance of the detection coil 15 or the induced voltage e.
【００２０】次に、図６により本発明の第３実施例とし
ての高周波電磁界鋳型における湯面レベル検出方法につ
いて説明すると、図６はその方法を適用された高周波電
磁界鋳型を模式的に示す断面図である。Next, referring to FIG. 6, a description will be given of a molten metal level detecting method in a high frequency electromagnetic field mold according to a third embodiment of the present invention. FIG. 6 schematically shows a high frequency electromagnetic field mold to which the method is applied. FIG.
【００２１】この第３実施例では、図６に示すように、
鋳型６とソレノイドコイル７との間にこのソレノイドコ
イル７の軸方向と平行になるように、互いに逆向きの巻
方向をもつ上下一対の検出用コイル１６ａ，１６ｂがそ
なえられ、溶融金属８の湯面レベルの変化に応じて上下
一対の検出用コイル１６ａ，１６ｂに誘起される電圧Ｖ
1，Ｖ2を測定し、測定された電圧Ｖ1，Ｖ2に基づいて後
述のごとく湯面レベルが検出される。In the third embodiment, as shown in FIG.
A pair of upper and lower detection coils 16a and 16b having winding directions opposite to each other are provided between the mold 6 and the solenoid coil 7 so as to be parallel to the axial direction of the solenoid coil 7, and the molten metal 8 is melted. The voltage V induced in the pair of upper and lower detection coils 16a and 16b according to the change of the surface level
1 and V 2 are measured, and the molten metal level is detected based on the measured voltages V 1 and V 2 as described later.
【００２２】つまり、ソレノイドコイル７の作る磁場の
ため、溶融金属８および検出用コイル１６ａ，１６ｂに
は誘導電流が流れ、各コイル１６ａ，１６ｂには誘起電
圧Ｖ1，Ｖ2が発生する。Ｖ1＝Ｖ2となる時の溶融金属８
の湯面レベルを基準点０とする。湯面レベルが基準点０
から離れた場合、溶融金属８中の渦電流により、Ｖ1≠
Ｖ2となる。湯面レベルと基準点０からの距離と誘起電
圧との間には一定の関係がある。二次電圧Ｖ1，Ｖ2の電
圧差を求め、これにより、湯面レベルを検出することが
できるのである。That is, due to the magnetic field generated by the solenoid coil 7, an induced current flows through the molten metal 8 and the detection coils 16a and 16b, and induced voltages V 1 and V 2 are generated in the coils 16a and 16b. Molten metal when V 1 = V 2 8
The reference level is 0 for the level of the molten metal. Reference level is 0
Away from V, due to eddy currents in the molten metal 8, V 1 ≠
It becomes V 2 . There is a fixed relationship between the molten metal level, the distance from the reference point 0, and the induced voltage. It is possible to detect the molten metal level by obtaining the voltage difference between the secondary voltages V 1 and V 2 .
【００２３】[0023]
【発明の効果】以上詳述したように、本発明の高周波電
磁界鋳型における湯面レベル検出方法によれば、湯面レ
ベルの変化に応じてソレノイドコイル自体に生じるイン
ダクタンス変動もしくは電流，電圧，力率，インピーダ
ンスを測定することにより、従来のごとく検出用に一次
コイルを使用することなく、湯面レベルを確実に検出で
きる効果がある。As described above in detail, according to the molten metal level detecting method in the high-frequency electromagnetic field mold of the present invention, the inductance variation or the current, voltage, force generated in the solenoid coil itself according to the variation of the molten metal level. By measuring the rate and the impedance, it is possible to reliably detect the molten metal level without using a primary coil for detection as in the conventional case.
【図１】本発明の第１実施例としての高周波電磁界鋳型
における湯面レベル検出方法を適用されたレベル測定回
路を示す構成図である。FIG. 1 is a configuration diagram showing a level measuring circuit to which a molten metal level detecting method in a high frequency electromagnetic field mold according to a first embodiment of the present invention is applied.
【図２】本実施例の高周波電磁界鋳型を模式的に示す断
面図である。FIG. 2 is a cross-sectional view schematically showing a high frequency electromagnetic field mold of this example.
【図３】本実施例の高周波電磁界鋳型の等価回路を示す
回路図である。FIG. 3 is a circuit diagram showing an equivalent circuit of the high frequency electromagnetic field mold of this example.
【図４】湯面レベルとコイルインダクタンスとの関係を
示すグラフである。FIG. 4 is a graph showing a relationship between a molten metal level and a coil inductance.
【図５】本発明の第２実施例としての高周波電磁界鋳型
における湯面レベル検出方法を適用された高周波電磁界
鋳型を模式的に示す断面図である。FIG. 5 is a cross-sectional view schematically showing a high frequency electromagnetic field mold to which a molten metal level detecting method in the high frequency electromagnetic field mold according to the second embodiment of the present invention is applied.
【図６】本発明の第３実施例としての高周波電磁界鋳型
における湯面レベル検出方法を適用された高周波電磁界
鋳型を模式的に示す断面図である。FIG. 6 is a cross-sectional view schematically showing a high frequency electromagnetic field mold to which a molten metal level detecting method in a high frequency electromagnetic field mold according to a third embodiment of the present invention is applied.
【図７】従来の渦流式溶鋼湯面レベル計を示す概略図で
ある。FIG. 7 is a schematic view showing a conventional eddy current molten steel level gauge.
６ 高周波電磁界鋳型 ７ ソレノイドコイル ８ 溶融金属 ９ 交流電源 １０ 電圧計 １１ 電流計 １２ 力率計 １３ インダクタンス(またはインピーダンス)演算部 １４ レベル演算部 １５，１６ａ，１６ｂ 検出用コイル 6 High-frequency electromagnetic field mold 7 Solenoid coil 8 Molten metal 9 AC power supply 10 Voltmeter 11 Ammeter 12 Power factor meter 13 Inductance (or impedance) calculator 14 Level calculator 15, 16a, 16b Detection coil
Claims (1)
ドコイルを外周に配置した高周波電磁界鋳型内における
溶融金属の湯面レベルを検出する方法であって、前記湯
面レベルの変化に応じて生じる前記ソレノイドコイルの
インダクタンス変動分もしくは電流，電圧，力率，イン
ピーダンスを測定し、測定されたインダクタンス変動分
もしくは電流，電圧，力率，インピーダンスに基づいて
前記湯面レベルを得ることを特徴とする高周波電磁界鋳
型における湯面レベル検出方法。1. A method for detecting a molten metal level of a molten metal in a high frequency electromagnetic field mold, wherein a solenoid coil for generating a high frequency electromagnetic field is arranged on the outer periphery, the method being generated according to a change of the molten metal level. A high-frequency electromagnetic wave characterized by measuring an inductance variation or current, voltage, power factor and impedance of a solenoid coil and obtaining the molten metal level based on the measured inductance variation or current, voltage, power factor and impedance. Method for detecting the level of molten metal in casting mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27585092A JPH06122056A (en) | 1992-10-14 | 1992-10-14 | Method for detecting level of molten metal in high frequency electromagnetic field casting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27585092A JPH06122056A (en) | 1992-10-14 | 1992-10-14 | Method for detecting level of molten metal in high frequency electromagnetic field casting die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06122056A true JPH06122056A (en) | 1994-05-06 |
Family
ID=17561310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27585092A Withdrawn JPH06122056A (en) | 1992-10-14 | 1992-10-14 | Method for detecting level of molten metal in high frequency electromagnetic field casting die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06122056A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029453A1 (en) * | 1997-12-08 | 1999-06-17 | Nippon Steel Corporation | Continuous casting apparatus using a molten metal level gauge |
| EP1133678A1 (en) * | 1999-07-16 | 2001-09-19 | POHANG IRON & STEEL CO., LTD. | Apparatus and method for measuring the molten metal level in electromagnetic continuous casting |
| RU206007U1 (en) * | 2021-03-24 | 2021-08-16 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | DEVICE FOR DETERMINING THE LEVEL OF MELTED METAL IN INDUCTION UNIT |
-
1992
- 1992-10-14 JP JP27585092A patent/JPH06122056A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999029453A1 (en) * | 1997-12-08 | 1999-06-17 | Nippon Steel Corporation | Continuous casting apparatus using a molten metal level gauge |
| US6337566B1 (en) | 1997-12-08 | 2002-01-08 | Nippon Steel Corporation | Continuous casting apparatus using a molten metal level gauge |
| EP1133678A1 (en) * | 1999-07-16 | 2001-09-19 | POHANG IRON & STEEL CO., LTD. | Apparatus and method for measuring the molten metal level in electromagnetic continuous casting |
| US6517604B1 (en) | 1999-07-16 | 2003-02-11 | Pohang Iron & Steel Co., Ltd. | Apparatus and method for measuring the molten metal level in electromagnetic continuous casting |
| EP1133678A4 (en) * | 1999-07-16 | 2005-07-27 | Po Hang Iron & Steel | Apparatus and method for measuring the molten metal level in electromagnetic continuous casting |
| RU206007U1 (en) * | 2021-03-24 | 2021-08-16 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | DEVICE FOR DETERMINING THE LEVEL OF MELTED METAL IN INDUCTION UNIT |
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