JPS61140362A - Method for controlling molten metal level in continuous casting device for thin sheet - Google Patents
Method for controlling molten metal level in continuous casting device for thin sheetInfo
- Publication number
- JPS61140362A JPS61140362A JP26180484A JP26180484A JPS61140362A JP S61140362 A JPS61140362 A JP S61140362A JP 26180484 A JP26180484 A JP 26180484A JP 26180484 A JP26180484 A JP 26180484A JP S61140362 A JPS61140362 A JP S61140362A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- rolls
- metal level
- continuous casting
- immersion nozzle
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/183—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring molten metal weight
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/185—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using optical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔本発明の産業分野〕
本発明は、薄板連続鋳造装置における溶湯レベル制御方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of the Invention] The present invention relates to a method for controlling molten metal level in a continuous thin plate casting apparatus.
２つのドラム間に溶湯を注湯し薄板を連続鋳造するツイ
ンドラム方式連続鋳造機では、板厚が２〜５咽の場合ド
ラムと接触して溶湯が凝固する時間、いわゆる凝固時間
は通常ＣｔＳ〜２秒である。この短時間の凝固を厳密に
制御することが得られた鋳片の性状を良好に保つため必
須である。このためにはドラム間の溶湯レベル針厳密に
制御することが重要であるが、従来の方法はタンディツ
シュからの定量供給によって行なわれていたため、その
制御が不充分であり、過凝固による圧延割れあるいは未
凝固によるバルジング（鋳片表面のふくれ現象）が生じ
、鋳片性状は必ずしも満足できるものではなかった。In a twin-drum continuous casting machine that pours molten metal between two drums and continuously casts a thin plate, when the plate thickness is 2 to 5 mm, the time for the molten metal to solidify upon contact with the drums, the so-called solidification time, is usually CtS ~ It is 2 seconds. Strict control of this short-time solidification is essential in order to maintain good properties of the obtained slab. For this purpose, it is important to strictly control the molten metal level needle between the drums, but since the conventional method was carried out by supplying a fixed amount from the tundish, this control was insufficient, resulting in rolling cracks due to oversolidification, Bulging (bulging phenomenon on the surface of the slab) occurred due to non-solidification, and the properties of the slab were not necessarily satisfactory.
そこで、本発明はロール間の溶湯レベルを適正に制御し
鋳片性状の向上を図る薄板連続鋳造装置における溶湯レ
ベル制御方法を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for controlling the molten metal level in a continuous thin plate casting apparatus, which appropriately controls the molten metal level between the rolls and improves the properties of the slab.
そして、本発明は、上記目的を達成する手段 −とじて
ロール間のメニスカス幅を検出しこの検出値に基づいて
浸漬ノズルを上・下させる点にある。すなわち本発明は
帯状の金属薄板を鋳造するための水平・平行に配置した
２本のロールと浸漬ノズルを有する連続鋳造装置におい
て、該ロール間のメニスカス幅を検出し、この検出値に
基づいて浸漬ノズルを上・下させてロール間の溶湯レベ
ルを適正に制御することを特徴とする薄板連続鋳造装置
における溶湯レベル制御方法である。And, the present invention is a means for achieving the above-mentioned object. - The meniscus width between the rolls is detected, and the immersion nozzle is moved up and down based on this detected value. That is, the present invention detects the meniscus width between the rolls in a continuous casting apparatus having two rolls arranged horizontally and parallel to each other and an immersion nozzle for casting a strip-shaped thin metal plate, and performs immersion based on this detected value. This is a method for controlling the level of molten metal in a continuous thin plate casting apparatus, which is characterized by appropriately controlling the level of molten metal between rolls by moving a nozzle up and down.
以下第１図に基づいて本発明の詳細な説明する。第１図
は本発明を実施するための薄板連続鋳造装置であシ、こ
の装置は薄板鋳片３を鋳造する水冷鋳造ロール１，１′
、水冷鋳造ロール１゜１′間の溶湯４の洩れを防止する
サイド固定せき２ 、２’、溶鋼等の溶湯４を溜めるタ
ンディツシュ５および浸漬ノズル６よりなりさらに、タ
ンディツシエ５内の溶湯量を測定する重量計７、信号処
理装置８、スライド弁１０の制御装置９、取鍋１１″！
たレンズ１２、グラスファイバー１５光検出器１４（テ
レビカメラＣＯＤカメラなど）ならびに浸漬ノズル制御
装置１５などを主要構成部材としている。The present invention will be explained in detail below based on FIG. FIG. 1 shows a continuous thin plate casting apparatus for carrying out the present invention, and this apparatus includes water-cooled casting rolls 1, 1' for casting a thin plate slab 3
, side fixed weirs 2, 2' for preventing leakage of molten metal 4 between water-cooled casting rolls 1° 1', tundish 5 for storing molten metal 4 such as molten steel, and immersion nozzle 6. Furthermore, the amount of molten metal in tundishier 5 is measured. weighing scale 7, signal processing device 8, control device 9 for slide valve 10, ladle 11''!
The main components include a lens 12, a glass fiber 15, a photodetector 14 (TV camera, COD camera, etc.), and an immersion nozzle control device 15.
この装置をさらに詳細に説明すると、水冷鋳造ロール１
，１′は水平に設置されており、図示しない駆動装置に
よシ回転（矢示方向）駆動される。この水冷鋳造ロール
１，１′は例えば銅または銅合金あるいは鋼材により形
成され内部に水冷機構を内蔵するものであり、溶湯４と
の接触面積を大きく得るため相当大径のロールとなって
いる。また、水冷鋳造ロール１，１′の両端部には、サ
イドをシールするだめの耐火材からなる固定せき２，２
′が押し当てられておシ、２本の水冷鋳造ロール１，１
′と２個の固定せき２゜、２′で形成される空間に浸漬
ノズル６により、溶湯４が注湯される。注湯された溶湯
４は水冷鋳造°ロール１，１′の表面に接触して冷却さ
れ、できた凝固シェルは回転する上記ロール１，１′に
より一体化され鋳片３となる。また、タンディツシュ５
内の溶湯量を重量計７によって測定しタンディツシュ５
の溶湯レベルを算出したのち、スライド弁１０を開閉し
、ロール１，１′に溶湯４が一定供給される。また、光
検出器１４によりロール１，１′間のメニスカス（Ｍ）
の幅を検出しロール１，１′間の溶湯レベルを算出した
のち浸漬ノズル６を上下する。To explain this device in more detail, water-cooled casting roll 1
, 1' are installed horizontally and are driven to rotate (in the direction of the arrow) by a drive device (not shown). The water-cooled casting rolls 1, 1' are made of copper, copper alloy, or steel, for example, and have a built-in water-cooling mechanism, and have a considerably large diameter in order to have a large contact area with the molten metal 4. Furthermore, fixed weirs 2 and 2 made of refractory material are provided at both ends of the water-cooled casting rolls 1 and 1' to seal the sides.
' is pressed against the plate, and the two water-cooled casting rolls 1, 1
The molten metal 4 is poured into the space formed by the fixed weir 2° and the two fixed weirs 2° and 2′ by the immersion nozzle 6. The poured molten metal 4 is cooled by contacting the surfaces of water-cooled casting rolls 1 and 1', and the resulting solidified shell is unified by the rotating rolls 1 and 1' to form a slab 3. Also, Tanditshu 5
Measure the amount of molten metal in the tundish 5 using a weighing scale 7.
After calculating the molten metal level, the slide valve 10 is opened and closed, and the molten metal 4 is constantly supplied to the rolls 1 and 1'. In addition, the photodetector 14 detects the meniscus (M) between the rolls 1 and 1'.
After detecting the width of the molten metal and calculating the molten metal level between the rolls 1 and 1', the immersion nozzle 6 is moved up and down.
以上で述べた薄板連続鋳造装置において鋳片３の性状を
良好に保つための浸漬ノズル６を上下させる方法につい
て説明する。A method of moving the immersion nozzle 6 up and down in order to maintain good properties of the slab 3 in the thin plate continuous casting apparatus described above will be described.
ロール１，１′間のメニスカス（Ｍ）の幅を光検出器１
４により検出して、その時点でのロール１，１′間の溶
湯レベルを算出し適正溶湯レベルとなるよう浸漬ノズル
６の浸漬部の体積を浸漬ノズル６の上下により変化させ
る。この浸漬ノズル６を上下させる手段としては、浸漬
ノズル制御装置１５からの信号により、油圧等を用いて
浸漬ノズル６を上下させる。Photodetector 1 measures the width of the meniscus (M) between rolls 1 and 1'.
4, the molten metal level between the rolls 1 and 1' at that time is calculated, and the volume of the immersed part of the immersed nozzle 6 is changed by moving the immersed nozzle 6 up and down so as to reach an appropriate molten metal level. As means for raising and lowering the immersed nozzle 6, the immersed nozzle 6 is moved up and down using hydraulic pressure or the like in response to a signal from the immersed nozzle control device 15.
以上本発明の詳細な説明したが、さらに本発明の具体例
をあげ、本発明をより詳細に説明する。Although the present invention has been described in detail above, the present invention will be explained in more detail by giving specific examples of the present invention.
鋼を鋳造した場合の構成部材の寸法ならびに諸条件は次
のとおりである。The dimensions and various conditions of the structural members in the case of casting steel are as follows.
（１）水冷鋳造ロール
鋼製で内部水冷方式。ロール直径は２０００■φ、ロー
ル幅１２００＋ｗ。鋳片寸法は３慴ｔｘ１２０（１ｍ＠
でありこのときのロール回−転速度（鋳造速度）は約２
８ｍ／―である。(1) Made of water-cooled cast roll steel with internal water cooling system. Roll diameter is 2000 φ, roll width 1200+w. Slab size is 3cmt x 120 (1m@
The roll rotation speed (casting speed) at this time is approximately 2
It is 8m/-.
（２）浸漬ノズル アルミナグラファイト製の浸漬ノズルを使用した。(2) Immersion nozzle An immersion nozzle made of alumina graphite was used.
【３）溶湯
通常の鋼の場合タンディツシュ内溶湯温度は１５２０〜
１５６０℃である。[3] Molten metal In the case of ordinary steel, the temperature of the molten metal in the tundish is 1520~
The temperature is 1560°C.
（４） 光検出器 ＴＶ カメラを使用した。(4) Photodetector A TV camera was used.
以上の諸条件でロール間の溶湯レベルが５００瓢となる
よう浸漬ノズルを微小に上下させ鋳造した結果、表面割
れ、およびバルジングのない良好外性状を有する鋳片が
安定して得られた。As a result of casting by slightly raising and lowering the immersion nozzle so that the molten metal level between the rolls was 500 ml under the above conditions, slabs with good external properties without surface cracks and bulging were stably obtained.
上記の溶湯レベル５００瓢の場合におけるメニスカスの
幅を、第２図に基づいて次式（１）及び（２）により計
算によって求めることができる。The width of the meniscus in the case of the above molten metal level of 500 gourds can be calculated by the following equations (1) and (2) based on FIG.
Ｗｔ
θ＝ ５ｉｎ−’ −−−−−−−−−ｆ２１上記式
（１）及び（２）中Ｗはロール１，１′間の溶湯４のメ
ニスカス（Ｍ）の幅であり、Ｒはロール１．１′の半径
、ｈは溶湯４のレベル、ｔは鋳片３の板厚である。そし
て、ｔ ＝ ５ ｗ、 Ｒ＝１０００笥、ｈ＝５００ａ
ｍとした場合上記（１）式及び（２）式からＷ＝２７０
．９５ｍと計算で求めることができる。Wt θ= 5in-' -------------f21 In the above formulas (1) and (2), W is the width of the meniscus (M) of the molten metal 4 between the rolls 1 and 1', and R is the width of the meniscus (M) of the molten metal 4 between the rolls 1 and 1'. 1.1' radius, h is the level of the molten metal 4, and t is the thickness of the slab 3. And t = 5 w, R = 1000 笥, h = 500a
If m, W = 270 from equations (1) and (2) above.
．． It can be calculated to be 95m.
本発明は以上詳記したように、ロール間のメニスカスの
幅を検出し、この検出値に基づいて浸漬ノズルを上・下
させるものであるから溶湯−のノズル浸漬部の体積を変
化させることができ、これによってロール間の溶湯レベ
ルを適宜上・下させることができ、ロール間の溶湯レベ
ルを精度よく適正に制御することができる効果が生ずる
。また、この結果、本発明では過凝固や未凝固のない性
状良好な鋳片を製造することができる効果が生ずるもの
でちる。As described in detail above, the present invention detects the width of the meniscus between the rolls and moves the immersion nozzle up and down based on this detected value, so it is possible to change the volume of the molten metal immersion part of the nozzle. As a result, the molten metal level between the rolls can be raised or lowered as appropriate, resulting in the effect that the molten metal level between the rolls can be accurately and appropriately controlled. Further, as a result, the present invention has the effect of being able to produce slabs with good properties without over-solidification or unsolidification.
第１図は本発明を実施するための薄板連続鋳造装置の縦
断面図である。第２図はロール間のメニスカス幅を計算
するためのロール間の拡大部分断面図でちる。
復代理人 内 １） 明
復代理人 萩 原 亮 −FIG. 1 is a longitudinal sectional view of a continuous thin plate casting apparatus for carrying out the present invention. FIG. 2 is an enlarged partial sectional view between the rolls for calculating the meniscus width between the rolls. Sub-agents 1) Meifuku agent Ryo Hagiwara -
Claims (1)
２本のロールと浸漬ノズルを有する連続鋳造装置におい
て、該ロール間のメニスカス幅を検出し、この検出値に
基づいて浸漬ノズルを上・下させてロール間の溶湯レベ
ルを適正に制御することを特徴とする薄板連続鋳造装置
における溶湯レベル制御方法。In a continuous casting machine that has two rolls arranged horizontally and parallel to each other and a submerged nozzle for casting a strip-shaped thin metal plate, the meniscus width between the rolls is detected, and the submerged nozzle is moved upward and downward based on this detected value. A method for controlling the level of molten metal in a continuous thin plate casting apparatus, characterized in that the level of molten metal between rolls is properly controlled by lowering the level of molten metal between rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26180484A JPS61140362A (en) | 1984-12-13 | 1984-12-13 | Method for controlling molten metal level in continuous casting device for thin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26180484A JPS61140362A (en) | 1984-12-13 | 1984-12-13 | Method for controlling molten metal level in continuous casting device for thin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61140362A true JPS61140362A (en) | 1986-06-27 |
| JPH0312985B2 JPH0312985B2 (en) | 1991-02-21 |
Family
ID=17366941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26180484A Granted JPS61140362A (en) | 1984-12-13 | 1984-12-13 | Method for controlling molten metal level in continuous casting device for thin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61140362A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6216856A (en) * | 1985-07-17 | 1987-01-26 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for continuous casting |
| JPH01273652A (en) * | 1988-04-25 | 1989-11-01 | Nisshin Steel Co Ltd | Method for continuously casting metal strip |
| AU663568B2 (en) * | 1992-02-20 | 1995-10-12 | British Steel Limited | Method and device for pouring molten metal |
-
1984
- 1984-12-13 JP JP26180484A patent/JPS61140362A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6216856A (en) * | 1985-07-17 | 1987-01-26 | Ishikawajima Harima Heavy Ind Co Ltd | Method and apparatus for continuous casting |
| JPH0555217B2 (en) * | 1985-07-17 | 1993-08-16 | Ishikawajima Harima Heavy Ind | |
| JPH01273652A (en) * | 1988-04-25 | 1989-11-01 | Nisshin Steel Co Ltd | Method for continuously casting metal strip |
| AU663568B2 (en) * | 1992-02-20 | 1995-10-12 | British Steel Limited | Method and device for pouring molten metal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0312985B2 (en) | 1991-02-21 |
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