JPH0299254A - Device and method for controlling molten metal surface level of continuous casting machine for thin steel sheet - Google Patents
Device and method for controlling molten metal surface level of continuous casting machine for thin steel sheetInfo
- Publication number
- JPH0299254A JPH0299254A JP63118493A JP11849388A JPH0299254A JP H0299254 A JPH0299254 A JP H0299254A JP 63118493 A JP63118493 A JP 63118493A JP 11849388 A JP11849388 A JP 11849388A JP H0299254 A JPH0299254 A JP H0299254A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- electromagnetic pump
- detection end
- induction type
- type electromagnetic
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 122
- 239000010959 steel Substances 0.000 title claims abstract description 122
- 238000009749 continuous casting Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title claims description 11
- 239000002184 metal Substances 0.000 title abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 48
- 238000005266 casting Methods 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims description 45
- 239000007924 injection Substances 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野］
本発明は、薄肉鋼板の鋳片を製造する連続鋳造機で、例
えば、１′６速度で鋳造を行う際に用いる。鋳型内溶鋼
湯面レベル制御装置と制御方法に関する。Detailed Description of the Invention "Industrial Application Field" The present invention is a continuous casting machine for producing slabs of thin-walled steel sheets, and is used when casting is performed at a speed of 1'6, for example. It relates to a level control device and a control method.
第３図は、薄肉鋼板連続鋳造機の例を示す図である。金
属ベルｌ−４，／Ｉ’は回動するブー１月、２．：ｌ。FIG. 3 is a diagram showing an example of a continuous casting machine for thin-walled steel plates. Metal bell l-4, /I' rotates Boo January, 2. :l.
及びｌ’、 ２’、 ３’の間に張り渡されて、矢印５
方向に走行して鋳型の長辺を形成する。金属ベル）へ４
゜４′が垂直に走行する部分には、短辺部材６，６′が
金属ベルト４，４″に挟みつけられて縦方向に配されて
いる。７，７′は金属ベルト４，４Ｌを裏面から冷却す
る冷却装置である。and l', 2', 3', arrow 5
run in the direction to form the long sides of the mold. metal bell) to 4
In the part where ゜4' runs vertically, short side members 6, 6' are sandwiched between the metal belts 4, 4'' and arranged in the vertical direction. 7, 7' run the metal belts 4, 4L This is a cooling device that cools from the back side.
タンデイツシュ１．０内の溶ｎ４８は金属ベルト４，４
′の垂直走行部と短辺部材６，６′で形成された鋳型に
注入されるが、金属ベルト４，４′は裏面が冷却されて
いるため、溶湯は走行しながら凝固し、薄肉鋼板９とな
って連続的に取り出されろ。The melt n48 in the tandate 1.0 is the metal belt 4,4
The metal belts 4, 4' are cooled on their back surfaces, so the molten metal solidifies while running, and the thin steel plate 9 and be taken out continuously.
この装置によると、例えば肉Ｊｖが４０ｍｍの薄肉鋼板
が溶鋼から直接製造できるために、鋼板の製造工程が大
幅に合理化されるが、＃Ｉｌ板が薄肉であるため生産性
（トン／時間）を」ユげろには、金属ベルト４゜４″を
高速度で走行させろ事が必要となる。According to this device, for example, a thin steel plate with a thickness Jv of 40 mm can be produced directly from molten steel, which greatly streamlines the steel plate manufacturing process. However, since the #Il plate is thin, productivity (tons/hour) is In order to "Yugero", it is necessary to run a metal belt 4°4" at high speed.
本発明は、例えば１−記の、高速度で鋳造を行う薄肉鋼
板連続ｖＩ造機の鋳ノ（シ内７８鋼湯而レベル制御装置
及び制御方法に関する。The present invention relates to a casting nozzle (inner 78 steel melt level control device and control method) for a continuous thin-walled steel plate forming machine that performs high-speed casting, for example as described in item 1.
［従来の技術］
例えば第３図の連続鋳造機で、溶鋼８を溶鋼流路の横断
面の形状が円形の、従来のノズル１１を用いて鋳型内に
注入すると、金属ベルト４と４′との間隔が狭く、大径
の注入ノズルは４と４′の間に挿入できない。小径の注
入ノズルは挿入できるが、高速度で注入するには多本数
の小径ノズルを用いることとなる。しかしタンデイツシ
ュ１０に多本数の小径ノズルを正確に配置する作業は厄
介である。[Prior Art] For example, in a continuous casting machine shown in FIG. 3, when molten steel 8 is injected into a mold using a conventional nozzle 11 whose cross section of the molten steel flow path is circular, metal belts 4 and 4' are formed. The spacing is narrow and a large diameter injection nozzle cannot be inserted between 4 and 4'. Although small-diameter injection nozzles can be inserted, a large number of small-diameter nozzles must be used to inject at high speed. However, the task of accurately arranging a large number of small diameter nozzles on the tundish 10 is troublesome.
又この方法では注入速度の正確な管理が重要で、例えば
第３図の連続鋳造機で、溶′ｊＴ１４８の注入速度（ト
ン７分）が金属ベルｌ−４，４’の走行速度よりも大き
過ぎると、溶鋼の湯面は急に」二昇して鋳型の上部より
溢れ出て鋳造事故となるし、又溶鋼の供給速度が少な過
ぎると、溶鋼の湯面は急に降下して溶鋼が鋳型のド部か
ら流れ出て鋳造事故となる。Accurate control of the injection speed is also important in this method. For example, in the continuous casting machine shown in Figure 3, the injection speed of the melt 'jT148 (7 tons) is higher than the running speed of the metal bell l-4,4'. If too much molten steel is supplied, the molten steel level will suddenly rise and overflow from the top of the mold, resulting in a casting accident.If the molten steel supply rate is too low, the molten steel level will suddenly drop and the molten steel will overflow from the top of the mold, resulting in a casting accident. It flows out of the groove of the mold, causing a casting accident.
更に第３３図の連続鋳造機で、溶鋼８の温度が変動する
と１薄肉鋼板の表面に肌不良が発生するが、薄肉鋼板で
は表面ｉｆｆ （ｍ ２／ ｍ トン）が大きいため、
この肌不良を手入れする１日士容易ではない。Furthermore, in the continuous casting machine shown in Fig. 33, when the temperature of the molten steel 8 fluctuates, skin defects occur on the surface of the thin steel plate 1, but since the surface iff (m 2 / m ton) is large in the thin steel plate,
It is not easy to take care of this poor skin in one day.
以１−述べた如く、薄肉鋼板連続鋳造機は、鋼板の製造
工程が大幅に合理化できる利点はあるが、ノズルの設定
や、注入速度の制御や、溶鋼温度の管理が困難なために
、未だ広〈実施されるには至っていない。As mentioned above, continuous casting machines for thin-walled steel sheets have the advantage of greatly streamlining the manufacturing process of steel sheets, but they are still difficult to set the nozzle, control the injection speed, and manage the temperature of molten steel. Hiro: It has not yet been implemented.
大公＋１１’１４／ｌ−１７６１９号公報は、連続鋳造
に才？ける溶融金属の注入速度の制御装置に関する。即
ちタンデイツシュ８内のノズルにの溶融金属を所望の高
さに保って溶融金属の静圧によって注入速度を制御する
装置で、ノズル」１の溶融金）Ｍを所望の高さに制御す
るために、タンデイツシュへの溶融金属の供給を誘導形
電磁ポンプで行う装置である。しかしこの方法では５例
えば誘導形ｆｆｌ磁ポンプを停市してもタンデイツシュ
内の溶融金属の静圧は急には変化しないで、従って注入
速度も急には変らないため、鋳型内の湯面の位置の変化
に応じて注入速度の迅速な応答性が必要な、薄肉鋼板連
続鋳造機の溶鋼湯面の位置を制御する装置としては十分
ではない。Is the Grand Duke +11'14/l-17619 publication good for continuous casting? The present invention relates to a control device for controlling the injection rate of molten metal. That is, it is a device that maintains the molten metal in the nozzle in the tundish 8 at a desired height and controls the injection speed by the static pressure of the molten metal. This is a device that uses an induction type electromagnetic pump to supply molten metal to the tundish. However, with this method, even if the induction type FFL magnetic pump is stopped, the static pressure of the molten metal in the tundish does not change suddenly, and therefore the injection rate also does not change suddenly. This is not sufficient as a device for controlling the position of the molten steel surface in a thin-walled steel plate continuous casting machine, which requires rapid response of the injection rate in response to changes in position.
又この公報に記載された誘導形ｔ１ｉ磁ポンプは、溶融
金属を移動せしめるためのみに使用するもので。Furthermore, the induction type t1i magnetic pump described in this publication is used only for moving molten metal.
溶融金属を加熱する装置ではない。It is not a device that heats molten metal.
汎用の誘導弐ガｉ気炉は、誘導電流を発生させて金属を
溶融あるいは加熱する装置であるが、これ等は溶融ある
いは加熱のためのみに使用するもので、溶融金属を移動
仕しぬる装置ではない６［発明が解決しようとする課題
］
本発明は、高速度で鋳造する薄肉鋼板連続鋳造機に才？
いて、タンデイツシュ八Ｙ）：人ノズルをｉＥ確に配置
する作業が容易であり、鋳型内の溶鋼の湯面を定位置に
保ってＵ造事故の発生が防１１−でき、溶鋼の温度の変
！１ＩＩＩを小さくして薄板鋼板の表面肌不良が防止で
き、更に誘導形電磁ポンプを注入速度の制御と溶鋼温度
の制御との両］１的に使用できる。簿肉鋼板連続Ｕ造機
の湯面制御装置及び湯面制御方法を開示するものである
。A general-purpose two-gauge induction furnace is a device that generates an induced current to melt or heat metal, but these are used only for melting or heating, and are not devices that move molten metal. No. 6 [Problems to be Solved by the Invention] The present invention provides a continuous casting machine for thin-walled steel sheets that casts at high speed.
(11-): It is easy for people to accurately position the nozzle, the level of molten steel in the mold can be maintained at a fixed position, preventing U-building accidents, and changes in the temperature of molten steel can be avoided. ! By reducing 1III, surface roughness of the thin steel plate can be prevented, and furthermore, the induction type electromagnetic pump can be used both for controlling the injection rate and for controlling the molten steel temperature. This invention discloses a hot water level control device and a hot water level control method for a continuous U-forming machine for thin steel plates.
［ａ題を解決するための手段および作用］本発明は、（
１）１Ｑ型内の湯面位置を検出する位置検出端と、溶ｍ
流路の横断面の形状がスリット状の矩形又は長楕円形の
注入ノズルと、注入ノズルに設けて溶鋼の注入速度を調
整できる誘導形電磁ポンプと１位置検出端からの信号に
より誘導形電磁ポンプの出力を制御する制御装置とを有
する、薄肉鋼板連続鋳造機の湯面制御′Ｊ装置であり、
また（２）前記（１）の湯面制御装置を用いて１位置検
出端からの信−）により誘導形電磁ポンプの出力を制御
して溶鋼の注入速度を、１ｉｌＩ節し、鋳型内の溶鋼の
湯面が定位置に保たれるように注入する、薄板連続紡造
機の湯面制御方法であり、また
（３）鋳型内の溶鋼の湯面位置を検出する位置検出端と
、溶鋼流路の横断面の形状がスリット状の矩形又は長楕
円形の注入ノズルと、注入ノズルに設けて溶鋼の注入速
度を調節できる誘導形電磁ポンプと、？Ｉｔ導形導磁電
磁ポンプ鋼へ供給する熱辰Ｑおよび誘導形電磁ポンプが
溶鋼を移動させる力■）とから下記第１式および第２式
により周波数ｆおよび電流ｉを算出して電力変換装置へ
伝達する演算装置と、演算装置の指令に従って商用電源
を周波数ｆおよびｍ流ｉの電力に変換して誘導形ｍ磁ポ
ンプに入力する電力変換′！Ａ置とを有する、薄肉鋼板
連続＆０造機の湯面制御装置であり、ｆ＝に、（Ｑ／Ｐ
）・・・・・・・・・・・・・・・・・・（１）ｉ＝Ｋ
ｚ（ｉコツで）・・・・・・・・（２）但しＫ１．に、
は定数
また
（４）溶鋼温度を検出する温度検出端と、前記（３）に
記載の位置検出端、注入ノズル、誘導形電磁ポンプ、電
力変換装置とを有し、１１つ位置検出端と温度検出端と
からの信５）を用いて誘導形電磁ポンプが溶鋼へ供給す
る熱にＱと誘導形電磁ポンプが溶鋼を移動させる力Ｐと
を算出し更にこのＱと１）を用いて、前記（３）に記載
した第１式および第２式から周波数ｆおよび電流ｊを算
出して電力変換装置へ伝達する演算装置とを有する湯面
制御装置を用いて、位置検出端と温度検出端とからの信
号により、溶鋼の注入速度と溶鋼の温度とを共通の誘導
形ｆｆｌ磁ポンプを用いてそれぞれ独立に制御して、溶
鋼の湯面位置と温度とを一定に保つように注入する、薄
肉鋼板連続鋳造機の湯面制御方法である。[Means and effects for solving problem a] The present invention provides (
1) A position detection end that detects the molten metal level position in the 1Q type, and a molten metal
A rectangular or oblong injection nozzle with a slit-like cross-sectional shape, an induction electromagnetic pump that can be installed in the injection nozzle to adjust the injection speed of molten steel, and an induction electromagnetic pump that receives a signal from a 1-position detection end. This is a hot water level control 'J device for a thin-walled continuous steel sheet casting machine, which has a control device for controlling the output of
(2) The output of the induction type electromagnetic pump is controlled by the signal from the 1-position detection end using the hot water level control device in (1) above to control the injection speed of the molten steel to 1ilI, and the molten steel in the mold is (3) A position detection end for detecting the position of the molten steel surface in the mold, and a molten steel flow path. An injection nozzle with a slit-like rectangular or oblong cross-sectional shape, and an induction electromagnetic pump that is installed in the injection nozzle and can adjust the injection speed of molten steel. The frequency f and current i are calculated from the following equations 1 and 2 from the heat flux Q supplied to the induction electromagnetic pump steel and the force (■) by which the induction electromagnetic pump moves molten steel, and the power conversion device A power conversion unit that converts commercial power into power of frequency f and m flow i according to the commands of the calculation device and inputs it to the induction type m magnetic pump! This is a hot water level control device for a thin-walled steel plate continuous &
)・・・・・・・・・・・・・・・・・・(1) i=K
z (with i tips)... (2) However, K1. To,
is a constant or (4) has a temperature detection end for detecting the molten steel temperature, the position detection end described in (3) above, an injection nozzle, an induction type electromagnetic pump, and a power converter, and has 11 position detection ends and a temperature detection end. Calculate the heat Q supplied by the induction type electromagnetic pump to the molten steel and the force P with which the induction type electromagnetic pump moves the molten steel using the signal 5) from the detection end, and further use this Q and 1) to calculate the Using a hot water level control device that has a calculation device that calculates the frequency f and current j from the first and second equations described in (3) and transmits them to the power conversion device, the position detection end and the temperature detection end are The injection speed of molten steel and the temperature of molten steel are controlled independently using a common induction type FFL magnetic pump, and the molten steel is injected to keep the molten steel level and temperature constant. This is a method for controlling the hot water level in a continuous steel sheet casting machine.
以ドに本発明を」ル体的に説明する。第１図は本発明で
用いる注入ノズルと注入ノズルに設けた誘導形電磁ポン
プの例を示す図である。The present invention will be explained in detail below. FIG. 1 is a diagram showing an example of an injection nozzle used in the present invention and an induction type electromagnetic pump provided in the injection nozzle.
本発明で注入ノズル＋１は、スリット状の矩形あるいは
第１図に示した如き長楕円形の横断面の溶鋼流路を有す
る耐火物で形成されている。溶鋼の流路がスリット状で
あるため、本発明の注入ノズルは外形がＭ形であり、金
属ベルト４と４′との狭い間隙にも容易に設定できる。In the present invention, the injection nozzle +1 is formed of a refractory material having a molten steel flow path having a rectangular slit shape or an oblong cross section as shown in FIG. Since the molten steel flow path is slit-shaped, the injection nozzle of the present invention has an M-shaped outer shape and can be easily installed even in the narrow gap between the metal belts 4 and 4'.
又多数個のノズルを用いる従来法に比べて、ノズル１１
をタンデイツシュ１０に正確に設置する作業も容易であ
る。後で述べる如く本発明ではノズルの流路中の溶鋼に
展開形移動磁界を作用せしめるが、ノズルの流路がスリ
ッ１−状で薄いため、移動磁界や誘導電流は溶鋼流の中
心速達して、注入流速や溶鋼温度の制御を正確に効率よ
く行う事ができる。Also, compared to the conventional method using a large number of nozzles, the number of nozzles 11
It is also easy to accurately install the tray on the tray 10. As will be described later, in the present invention, an expanded moving magnetic field is applied to the molten steel in the flow path of the nozzle, but since the flow path of the nozzle is slit-like and thin, the moving magnetic field and induced current do not reach the center velocity of the molten steel flow. , injection flow rate and molten steel temperature can be controlled accurately and efficiently.
第１図で１３は誘導形電磁ポンプである０本発明で誘導
形電磁ポンプとは、展開形移動磁界を用いたリニアモー
タ一方式の誘導電磁ポンプをいう。本発明では誘導形電
磁ポンプを注入ノズル１１に設けて流路１２を通過する
溶鋼の速度あるいは速度と温度を直接に制御する。誘導
形１’［を磁ポンプは従来のストッパーまたはスライデ
ィングノズルを用いる方法に比べて高い精度で溶鋼の注
入速度を制御できる。又本発明では誘導形電磁ポンプが
注入ノズルの流路１２の溶鋼の速度を直接制御するよう
にしたため１位置検出端からの信号に迅速に応答して注
入速度を調節する事ができる。 本発明で用いる位置検
出端としては、放射線を用いたセンサーや鋳型内の溶鋼
からの発光を感知する感光センサーやＣＣＶカメラ等を
用いる事ができる０本発明では位置検出端からの信号を
受けて誘導電磁ポンプの出力を制御し、流路１２の溶鋼
の速度あるいは速度と温度とを制御する。In FIG. 1, reference numeral 13 indicates an induction type electromagnetic pump. In the present invention, the induction type electromagnetic pump refers to a linear motor-type induction electromagnetic pump using an expanded moving magnetic field. In the present invention, an induction type electromagnetic pump is provided in the injection nozzle 11 to directly control the speed or speed and temperature of the molten steel passing through the flow path 12. Inductive type 1' magnetic pumps can control the injection rate of molten steel with higher precision than conventional methods using stoppers or sliding nozzles. Further, in the present invention, since the induction type electromagnetic pump directly controls the speed of the molten steel in the flow path 12 of the injection nozzle, the injection speed can be adjusted in quick response to a signal from the 1-position detection end. As the position detection end used in the present invention, a sensor using radiation, a photosensitive sensor that detects light emitted from molten steel in the mold, a CCV camera, etc. can be used. The output of the induction electromagnetic pump is controlled to control the speed or speed and temperature of the molten steel in the flow path 12.
次に、誘導形′？ｒ１磁ポンプを用いて、流路１２の溶
鋼の速度と温度を同時に制御する方法を説明する。Next, the induced form′? A method for simultaneously controlling the speed and temperature of molten steel in the flow path 12 using the r1 magnetic pump will be explained.
この際に、誘導形電磁ポンプが溶鋼を移動させる力Ｐ及
び誘導形電磁ポンプが溶鋼に与えろ熱駄Ｑは下記第３式
及び第４式の如くとなる。At this time, the force P that the induction type electromagnetic pump moves the molten steel and the heat force Q that the induction type electromagnetic pump applies to the molten steel are as shown in the following equations 3 and 4.
１１＝Ｋ１、・ｆ−ｉ ”［ｋｇｆ／ｋＨ］・・・・・
・・・・・・３Ｑ ＝ ｋ２・ｆ ２・ｉ ”［℃／ｓ
ｅｃ／ｋｇｉ−・・４但しｒ：入力電源周波数［１１７
，］ｌ ”線電流［Δ］。11=K1,・fi” [kgf/kH]...
・・・・・・3Q = k2・f 2・i ”[℃/s
ec/kgi-...4 However, r: Input power frequency [117
,]l'' line current [Δ].
ｋＩ＝定数、に２：定数
第：１式及び第４式は、溶鋼に流れる渦電流による反６
ｊ＆場が、誘導コイルに流れる印加電流によろ印加磁場
よりも小さい、低周波領域において成−ｌする。kI = constant, 2: constant 1st equation and 4th equation are the anti-6
The field is formed in the low frequency region where the applied current flowing through the induction coil is smaller than the applied magnetic field.
高周波領域は、誘導形ｆｆｌ磁ポンプのインピーダンス
が増えて電源容にが大きくなる１β１にはｆノが大きく
ならないため、誘導形電磁ポンプの使用−１−得策では
ない。In the high frequency region, the impedance of the induction type ffl magnetic pump increases and the power supply capacity becomes large.Since f does not increase to 1β1, it is not advisable to use an induction type electromagnetic pump.
上記第３式と第４式から、ｌ” ｎｔの第５式及び第６
式が得られる。即ち
ｆ’＝（ｋ、／に、）（Ｑ／Ｐ）・・・・・・・・・・
・・５に□／に２＝Ｋ１、．φ乙７正７＝に２とすると
、第５式及び第６式はト記の第１式及び第２式の如くに
表される。From the third and fourth equations above, the fifth and sixth equations of l” nt
The formula is obtained. That is, f'=(k,/to,)(Q/P)...
・・5 to □/to 2=K1, . If φ Otsu 7 Positive 7= is set to 2, the fifth and sixth equations are expressed as the first and second equations in G.
ｆ＝Ｋ１、（Ｑ／Ｐ） ・・・・・・・・・・・・・
・・１ｉ＝に、（い＝）τ）・・・・・・２但しＫ１、
＝定数、に２＝定数
第２図は第１式及び第２式を用いて、溶鋼の注入速度と
温度を同時に制御する方θモの具体的な例を示す図であ
る。f=K1, (Q/P) ・・・・・・・・・・・・
...1i=to, (i=)τ)...2However, K1,
= constant, 2 = constant Figure 2 is a diagram showing a specific example of a method of simultaneously controlling the injection rate and temperature of molten steel using the first and second equations.
図中１４は本発明の位置検出端で、鋳型内の溶鋼湯ｉｒ
ｒ？ ＋ｆｒｉ サｘ ヲ検出する。基’Ｉ（Ｉ！ｍ
＃Ｒ湯面Ｓｔ＋ サ（操業り最適な溶鋼湯面高さ）ｘ、
とＸとの差（Ｘ −Ｘｏ）によって誘導形？［ポンプが
溶鋼を移動させる力ｌ）を変化させる。尚Ｐは（Ｘ、−
Ｘｎ）の函数であり、連続鋳造の操業に最も好ましい関
係式として、例えば第７式の如くに予め決めておく。14 in the figure is a position detection end of the present invention, which detects the molten steel in the mold.
r? +fri sa x wo detection. Group'I (I!m
#R molten steel surface St + sa (optimum molten steel surface height for operation) x,
Induced form by the difference between and X (X - Xo)? [Changing the force l) with which the pump moves the molten steel. Note that P is (X, -
Xn), and is predetermined as the most preferable relational expression for continuous casting operations, such as Equation 7, for example.
ｐ ＝ψ（Ｘ−ＫＯ）・・・・・・・・・・・・・・・
７図中１６は本発明の演算装置で、Ｘ、、と第７式が予
め入力されている６位置検出端１４が検出した溶鋼湯面
高さ又は演算装置１６に伝られ、演算装置１６はＸに相
応するｉ、）、を算出する。p = ψ(X-KO)・・・・・・・・・・・・・・・
Reference numeral 16 in Fig. 7 is an arithmetic device of the present invention, in which the molten steel level height detected by the six-position detection end 14, into which the seventh equation (X, . i,) corresponding to X is calculated.
図中１５は溶鋼の温度検出端で、溶鋼温度りを検出する
。基準溶鋼４１１度し。ともとの差（シーシ。）によっ
て誘導形電磁ポンプが溶鋼へ供給する熱ｒ１１を調節す
る６尚Ｑは（＋、−１，，ｌ）の函数としてなめ下記第
８式の如くに設定されている。In the figure, 15 is a molten steel temperature detection end, which detects the molten steel temperature. Standard molten steel is 411 degrees. The heat r11 supplied to the molten steel by the induction electromagnetic pump is adjusted by the original difference (sheesh).6 Note that Q is set as a function of (+, -1,, l) as shown in the following equation 8. There is.
Ｑ ＝ （＋＋ （１； −１；。）・・・・・・・・
・・・・・・・８本発明の演算装置１６には、し。と第
８式が予め入力されている。温度検出端１５が検出した
溶鋼温度ｔ。Q = (++ (1; -1;.)・・・・・・・・・
......8 The arithmetic device 16 of the present invention includes: and the eighth equation are input in advance. Molten steel temperature t detected by temperature detection end 15.
は演算装置１６に伝えられ、演算装置１６はｔ、に相応
するＱ、を算出する。is transmitted to the arithmetic unit 16, and the arithmetic unit 16 calculates Q, which corresponds to t.
本発明の演算装置１６には、更に前記第１式と第２式が
入力されている。従って演算装置１６は１ン、及びＱ、
と第１式及び第２式から、誘導形電磁ポンプに入力する
周波数［１と電流ｉ、をｌ：記の如くに算出する。The arithmetic unit 16 of the present invention is further inputted with the first equation and the second equation. Therefore, the arithmetic units 16 are 1, and Q,
From the first and second equations, the frequency [1 and current i, which are input to the induction electromagnetic pump, are calculated as shown below.
ｆ、＝に、（Ｑ、／Ｐ、）、 ｉ、＝に、（０７７丁
）第２図で１７は商用電源で１８は電力変換装置である
。f,=, (Q,/P,), i,=, (077th block) In FIG. 2, 17 is a commercial power source and 18 is a power converter.
本発明で演算Ｈ１ｎ、＋６は、電力変換装置１８を制御
して商用電源１８を周波数ｒｌ及び電流１１の電力に変
換する。この変換された電力は誘導形ｆｆｌ磁ポンプに
伝えられ、溶鋼流路ｌｚ内の溶鋼にｌ）１の移動力とＱ
、の熱にを与える。In the present invention, the calculation H1n, +6 controls the power conversion device 18 to convert the commercial power source 18 into power having a frequency rl and a current 11. This converted power is transmitted to the induction type ffl magnetic pump, and the molten steel in the molten steel flow path lz is given a moving force of l) 1 and Q
, give the heat of.
以１−述べた如くに、溶鋼は位置検出端１４と温度検出
端１５の信号によって、誘導形電磁ポンプ１３から１）
、の移動力とＱ、の熱にを与えられて、基°（＜ｆ！溶
鋼湯面Ｘ、と基憎溶鋼温度Ｌ０に回復するように、注入
速度と溶鋼温度が制御される。As mentioned above, molten steel is pumped from the induction electromagnetic pump 13 by the signals from the position detection end 14 and the temperature detection end 15.
Given the moving force of , and the heat of Q, the injection speed and the molten steel temperature are controlled so that the molten steel surface recovers to the base temperature L0, where the molten steel surface X and the base temperature L0 are given.
尚本発明で、温度検出端１５や電力変換装置１８は汎用
のものを用いる事ができる。In the present invention, general-purpose devices can be used for the temperature detection terminal 15 and the power converter 18.
［発明の効果］
以−１−述べた如く、本発明によって、高速度で鋳造す
る薄肉鋼板連続鋳造機において、タンデイツシュへノズ
ルを取りつける作業が容易となり、紡型内の溶鋼の湯面
を定位置に保って鋳造事故の発生が防出でき、溶鋼のが
、１度の変動を小さくして表面肌が良好な薄板鋼板がｆ
Ｒ造でき、更に誘導形電磁ブボンプを注入速度の制御と
溶鋼温度の制御との両目的に使用できる。[Effects of the Invention] As described in -1- above, the present invention facilitates the work of attaching the nozzle to the tandem shell in a continuous thin-walled steel sheet casting machine that casts at high speed, and it is possible to keep the molten steel level in the spinning mold in a fixed position. The occurrence of casting accidents can be prevented by keeping the molten steel at a constant temperature, and the thin steel plate with a good surface texture can reduce the fluctuation of 1 degree of molten steel.
It is possible to perform R-building, and furthermore, the induction type electromagnetic pump can be used for both the purpose of controlling the injection rate and the temperature of the molten steel.
第１図は本発明の注入ノズルと誘導形電磁ポンプの例を
示す図
第２図は本発明で溶鋼の注入速度と温度を制御する例を
示す図
第；３図は薄板連続鋳造機の例を示す同第４図は制御シ
ステムのブロック図
である。
第２図
第１図Fig. 1 shows an example of the injection nozzle and induction type electromagnetic pump of the present invention. Fig. 2 shows an example of controlling the injection rate and temperature of molten steel according to the invention; Fig. 3 shows an example of a continuous thin plate casting machine. FIG. 4 is a block diagram of the control system. Figure 2 Figure 1
Claims (4)
、溶鋼流路の横断面の形状がスリット状の矩形又は長楕
円形の注入ノズルと、注入ノズルに設けて溶鋼の注入速
度を調節できる誘導形電磁ポンプと、位置検出端からの
信号により誘導形電磁ポンプを制御する制御装置とを有
する事を特徴とする、薄肉鋼板連続鋳造機の湯面制御装
置(1) A position detection end for detecting the level position of molten steel in the mold, an injection nozzle whose cross section of the molten steel flow path has a slit-like rectangular or oblong shape, and an injection nozzle installed in the injection nozzle to speed up the injection of molten steel. A hot water level control device for a continuous casting machine for thin-walled steel sheets, characterized by having an induction type electromagnetic pump that can adjust the temperature, and a control device that controls the induction type electromagnetic pump based on a signal from a position detection end.
、溶鋼流路の横断面の形状がスリット状の矩形又は長楕
円形の注入ノズルと、注入ノズルに設けて溶鋼の注入速
度を調節できる誘導形電磁ポンプと、位置検出端からの
信号により誘導形電磁ポンプを制御する制御装置とを有
する薄肉鋼板連続鋳造機の湯面制御装置を用いて、位置
検出端からの信号により誘導形電磁ポンプの出力を制御
して溶鋼の注入速度を調整し、鋳型内の溶鋼の湯面が定
位置に保たれるように注入する事を特徴とする、薄肉鋼
板連続鋳造機の湯面制御方法(2) A position detection end for detecting the level position of molten steel in the mold, an injection nozzle with a slit-like cross-sectional shape of a rectangular or oblong molten steel flow path, and a molten steel injection speed provided in the injection nozzle. Using a hot water level control device for a thin-walled steel continuous casting machine, which has an induction type electromagnetic pump that can adjust the temperature and a control device that controls the induction type electromagnetic pump using signals from the position detection end, Molten steel level control for continuous casting machines for thin-walled steel sheets, which controls the output of a type electromagnetic pump to adjust the injection speed of molten steel, and injects molten steel so that the molten steel level in the mold is maintained at a fixed position. Method
、溶鋼流路の横断面の形状がスリット状の矩形又は長楕
円形の注入ノズルと、注入ノズルに設けた誘導形電磁ポ
ンプと、誘導形電磁ポンプが溶鋼へ供給する熱量Ｑおよ
び誘導形電磁ポンプが溶鋼を移動させる力Ｐを与えて、
下記第１式および第２式により周波数ｆ及び電流ｉを算
出して電力変換装置に伝える演算装置と、演算装置の指
令に従って商用電源を周波数ｆ及び電流ｉの電力に変換
して誘導形電磁ポンプに入力する電力変換装置とを有す
る事を特徴とする、薄肉鋼板連続鋳造機の湯面制御装置 ｆ＝Ｋ＿１（Ｑ／Ｐ）・・・・・・・・・・・・・・・
（１） ｉ＝Ｋ＿２（√［Ｐ＾２／Ｑ］）・・・・・・・・・・
（２） 但しＫ＿１及びＫ＿２は常数(3) A position detection end that detects the level of molten steel in the mold, an injection nozzle whose cross section of the molten steel flow path is rectangular or oblong with a slit, and an induction electromagnetic pump installed in the injection nozzle. , the amount of heat Q that the induction type electromagnetic pump supplies to the molten steel, and the force P that the induction type electromagnetic pump moves the molten steel,
An arithmetic device that calculates a frequency f and a current i according to the first and second equations below and transmits it to a power converter, and an induction electromagnetic pump that converts commercial power into power with a frequency f and a current i according to instructions from the arithmetic device. A hot water level control device f=K_1(Q/P) for a continuous thin steel sheet casting machine, characterized by having a power conversion device that inputs input to the machine f=K_1(Q/P)
(1) i=K_2(√[P^2/Q])・・・・・・・・・・・・
(2) However, K_1 and K_2 are constants
、溶鋼の温度を検出する温度検出端と、溶鋼流路の横断
面の形状がスリット状の矩形又は長楕円形の注入ノズル
と、注入ノズルの側面に設けた誘導形電磁ポンプと、位
置検出端と温度検出端とからの信号で誘導形電磁ポンプ
が溶鋼へ供給する熱量Ｑと誘導形電磁ポンプが溶鋼を移
動させる力Ｐを算出し更にこのＱ及びＰを用いて下記第
１式及び第２式から周波数ｆ及び電流ｉを算出する演算
装置と、演算装置の指令に従って商用電源を周波数ｆ及
び電流ｉの電力に変換して誘導形電磁ポンプに入力する
電力変換装置とを有する薄肉鋼板連続鋳造機の湯面制御
装置を用いて、位置検出端と温度検出端からの信号によ
り溶鋼の湯面位置とノズル内溶鋼の加熱温度とを一定に
保つように注入する事を特徴とする、薄肉鋼板連続鋳造
機の湯面制御方法 ｆ＝Ｋ＿１（Ｑ／Ｐ）・・・・・・・・・・・・・・・
（１） ｉ＝Ｋ＿２（√［Ｐ＾２／Ｑ］）・・・・・・・・・・
（２） 但しＫ＿１、及びＫ＿２は定数(4) A position detection end for detecting the level position of molten steel in the mold, a temperature detection end for detecting the temperature of molten steel, and a rectangular or oblong injection nozzle with a slit-like cross section of the molten steel flow path. , the amount of heat Q that the induction electromagnetic pump supplies to the molten steel based on the signals from the induction electromagnetic pump installed on the side of the injection nozzle, the position detection end, and the temperature detection end, and the force P with which the induction electromagnetic pump moves the molten steel. and a calculation device that calculates the frequency f and current i from the first and second equations below using Q and P, and converts the commercial power source into power with frequency f and current i according to the instructions of the calculation device. The molten steel surface position and the heating of the molten steel in the nozzle are determined by the signals from the position detection end and the temperature detection end using the molten steel level control device of the thin-walled continuous steel sheet casting machine, which has a power conversion device that inputs the power to the induction type electromagnetic pump. A method for controlling the hot water level in a continuous casting machine for thin-walled steel sheets, which is characterized by injecting water so as to keep the temperature constant f=K_1 (Q/P)・・・・・・・・・・・・・・・
(1) i=K_2(√[P^2/Q])・・・・・・・・・・・・
(2) However, K_1 and K_2 are constants
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63118493A JPH0299254A (en) | 1988-05-16 | 1988-05-16 | Device and method for controlling molten metal surface level of continuous casting machine for thin steel sheet |
| KR1019900700078A KR920004689B1 (en) | 1988-05-16 | 1989-05-16 | Injection apparatus and injection control method for high-speed thin plate continuous casting machine |
| US07/459,822 US5027885A (en) | 1988-05-16 | 1989-05-16 | Injection apparatus and injection control method for high-speed thin plate continuous casting machine |
| AU35654/89A AU608445B2 (en) | 1988-05-16 | 1989-05-16 | Injector for high speed thin continuous casting machine and pouring control method |
| PCT/JP1989/000493 WO1989011362A1 (en) | 1988-05-16 | 1989-05-16 | Injector for high speed thin continuous casting machine and pouring control method |
| EP19890905753 EP0374260A4 (en) | 1988-05-16 | 1989-05-16 | Injector for high speed thin continuous casting machine and pouring control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63118493A JPH0299254A (en) | 1988-05-16 | 1988-05-16 | Device and method for controlling molten metal surface level of continuous casting machine for thin steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0299254A true JPH0299254A (en) | 1990-04-11 |
| JPH0561024B2 JPH0561024B2 (en) | 1993-09-03 |
Family
ID=14738040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63118493A Granted JPH0299254A (en) | 1988-05-16 | 1988-05-16 | Device and method for controlling molten metal surface level of continuous casting machine for thin steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0299254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387597B1 (en) * | 1998-12-29 | 2003-10-22 | 주식회사 포스코 | The continuous casting system using linear motor electro magnetic pump |
| JP2019515623A (en) * | 2016-05-03 | 2019-06-06 | タタ、スティール、ネダーランド、テクノロジー、ベスローテン、フェンノートシャップＴａｔａ Ｓｔｅｅｌ Ｎｅｄｅｒｌａｎｄ Ｔｅｃｈｎｏｌｏｇｙ Ｂｖ | Temperature control method of electromagnetic pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01205852A (en) * | 1988-02-12 | 1989-08-18 | Toshiba Corp | Apparatus for controlling molten steel level |
-
1988
- 1988-05-16 JP JP63118493A patent/JPH0299254A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01205852A (en) * | 1988-02-12 | 1989-08-18 | Toshiba Corp | Apparatus for controlling molten steel level |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387597B1 (en) * | 1998-12-29 | 2003-10-22 | 주식회사 포스코 | The continuous casting system using linear motor electro magnetic pump |
| JP2019515623A (en) * | 2016-05-03 | 2019-06-06 | タタ、スティール、ネダーランド、テクノロジー、ベスローテン、フェンノートシャップＴａｔａ Ｓｔｅｅｌ Ｎｅｄｅｒｌａｎｄ Ｔｅｃｈｎｏｌｏｇｙ Ｂｖ | Temperature control method of electromagnetic pump |
| US11261860B2 (en) | 2016-05-03 | 2022-03-01 | Tata Steel Nederland Technology B.V. | Method to control the temperature of an electromagnetic pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0561024B2 (en) | 1993-09-03 |
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