JPH0249181B2 - RENZOKUCHUZOHOHO - Google Patents
RENZOKUCHUZOHOHOInfo
- Publication number
- JPH0249181B2 JPH0249181B2 JP26180384A JP26180384A JPH0249181B2 JP H0249181 B2 JPH0249181 B2 JP H0249181B2 JP 26180384 A JP26180384 A JP 26180384A JP 26180384 A JP26180384 A JP 26180384A JP H0249181 B2 JPH0249181 B2 JP H0249181B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- rolls
- roll
- nozzle
- casting
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 238000005266 casting Methods 0.000 claims description 20
- 238000007654 immersion Methods 0.000 claims description 19
- 230000007935 neutral effect Effects 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000007711 solidification Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
Description
【発明の詳細な説明】
〔本発明の産業分野〕
本発明は、鋳造ロールを用いる連続鋳造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of the Invention] The present invention relates to a continuous casting method using casting rolls.
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〜
５mm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0.5〜２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を厳密に制御する
ことが重要であるが、従来の方法はタンデイツシ
ユからの定量供給によつ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
のではなかつた。
A twin-drum continuous casting machine that pours molten metal between two drums and continuously casts thin plates has a thickness of 2 to 2.
In the case of 5 mm, the time for the molten metal to solidify upon contact with the drum, the so-called solidification time, is usually 0.5 to 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 between the drums, but the conventional method was to supply a fixed amount from a tundish.
This control was insufficient, and rolling cracks due to oversolidification or bulging (bulging phenomenon on the slab surface) due to non-solidification occurred, and the properties of the slab were not necessarily satisfactory.
そこで、本発明は、上記の欠点を解消し、鋳造
ロールから取り出す鋳片の過凝固及び未凝固を防
止し、ロールの中立点における凝固シエルの厚さ
を一定範囲に制御する方法を提供しようとするも
のである。
Therefore, the present invention aims to eliminate the above-mentioned drawbacks, prevent over-solidification and unsolidification of the slab taken out from the casting rolls, and provide a method for controlling the thickness of the solidified shell at the neutral point of the rolls within a certain range. It is something to do.
本発明は、上記目的を達成する手段としてロー
ルの反力を検出し、この検出値に基づいて浸漬む
ノズルを上下させる点にある。すなわち、本発明
は、一定の間〓をあけて配置された２本の鋳造ロ
ール間に浸漬ノズルを介して溶湯を供給し、ロー
ルの下方より帯状金属薄板を取り出す連続鋳造方
法において、上記ロールの反力を測定し、測定値
に対応して上記ノズルの浸漬深さを変化させて溶
湯レベルを調節することにより、ロール中立点に
おける凝固シエルの厚さを一定範囲に制御するこ
とを特徴とする連続鋳造方法である。
The present invention, as a means for achieving the above object, consists in detecting the reaction force of the roll and moving the immersing nozzle up and down based on this detected value. That is, the present invention provides a continuous casting method in which molten metal is supplied via an immersion nozzle between two casting rolls arranged with a certain distance apart, and a strip metal sheet is taken out from below the rolls. The thickness of the solidified shell at the roll neutral point is controlled within a certain range by measuring the reaction force and adjusting the molten metal level by changing the immersion depth of the nozzle in accordance with the measured value. This is a continuous casting method.
なお、ここで「ロールの中立点」とは、一定の
間〓をもつて互いに反対方向に回転する一対の冷
却ロールの最も間〓の小さな部分、即ち、一対の
の冷却ロールの中心を結んだ直線上に位置するロ
ール表面の間をいう。 Note that the "neutral point of the rolls" here refers to the point where the distance between the pair of cooling rolls is the smallest, that is, the center of the pair of cooling rolls that rotate in opposite directions with a certain distance between each other. It refers to the space between the roll surfaces located on a straight line.
凝固シエルは、冷却された鋳造ロール表面上で
形成され、下方に向かつてその厚さを増し、ロー
ル中立点で左右の凝固シエルは、一体化されて鋳
片として取り出される。この中立点における凝固
シエルの厚さを一定範囲に保持することが、過凝
固による圧延割れや未凝固によるバルジングを防
止するために重要である。一方、安定した鋳片を
製造するために、鋳造条件を一定にして運転する
が、実際には、タンデイツシユからの流量の変
動、ロール速度の変動、ロール表面温度の変動等
の鋳造条件は微妙に変動するため、この変動にと
もない凝固シエルの厚さも変化する。その際に、
ロールの中立点における凝固シエルの厚さが厚く
なつて過凝固現象を生ずると、ロールに加わる反
力が大きくなり、逆に、薄くなつて未凝固現象が
生ずると反力は小さくなる。 A solidified shell is formed on the cooled casting roll surface and increases in thickness as it moves downward, and at the roll neutral point, the left and right solidified shells are integrated and taken out as a slab. It is important to maintain the thickness of the solidified shell at the neutral point within a certain range in order to prevent rolling cracks due to oversolidification and bulging due to non-solidification. On the other hand, in order to produce stable slabs, casting conditions are kept constant during operation, but in reality, casting conditions such as fluctuations in flow rate from the tundish, fluctuations in roll speed, and fluctuations in roll surface temperature may vary slightly. Because of this variation, the thickness of the solidified shell also changes with this variation. At that time,
When the thickness of the solidified shell at the neutral point of the roll becomes thick and an over-solidified phenomenon occurs, the reaction force applied to the roll becomes large; conversely, when the solidified shell becomes thin and an unsolidified phenomenon occurs, the reaction force becomes small.
そこで、本発明では、ロールの反力を測定し、
過凝固に対しては浸漬ノズルを上方に移動してノ
ズルの浸漬体積減（ノズル内の溶湯を含めた体積
減）に対応して、溶湯レベルを低くし、溶湯とロ
ールとの接触距離を短くすることにより、ロール
の中立点における凝固シエルの厚さを薄くし、逆
に、未凝固に対しては浸漬ノズルを下方に移動し
て、溶湯レベルを高くし、溶湯とロールとの接触
距離を長くすることにより、凝固シエルの厚さを
厚くし、過凝固及び未凝固のない鋳片を製造しよ
うとするものである。 Therefore, in the present invention, the reaction force of the roll is measured,
To prevent over-solidification, move the immersion nozzle upward to reduce the immersion volume of the nozzle (reduction in volume including the molten metal inside the nozzle), lower the molten metal level, and shorten the contact distance between the molten metal and the roll. This reduces the thickness of the solidified shell at the neutral point of the roll, and conversely moves the immersion nozzle downward for unsolidified metal to increase the molten metal level and shorten the contact distance between the molten metal and the roll. By increasing the length, the thickness of the solidified shell is increased, and slabs without over-solidified or unsolidified parts are produced.
以下第１図に基づいて本発明を詳細に説明す
る。第１図は本発明を実施するための薄板連続鋳
造装置であり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を溜めるタンデイツシユ５
および浸漬ノズル６よりなり、さらに、タンデイ
ツシユ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１
１、また、ドラムの反力を検出するロードセル１
２，１２′、浸漬ノズル６を上下させる浸漬ノズ
ル制御装置１３などを主要構成材としている。 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 prevents leakage of molten metal 4 between water-cooled casting rolls 1 and 1' for casting thin plate slabs 3, and water-cooled casting rolls 1 and 1'. Side fixed weir 2,
2', tundish 5 for storing molten metal 4 such as molten steel;
and an immersion nozzle 6, further comprising a weighing scale 7 for measuring the amount of molten metal in the tundish 5, a signal processing device 8, a control device 9 for the slide valve 10, and a ladle 1.
1. Also, load cell 1 that detects the reaction force of the drum
2, 12', and a submerged nozzle control device 13 for moving the submerged nozzle 6 up and down.
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
ない駆動装置により回転（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つてい
る。また水冷鋳造ロール１，１′の両端部にはサ
イドをシールするための耐火材からなる固定せき
２，２′が押し当てられており、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、できた凝固シエルは該
ロール１，１′の回転に伴つて一体化され鋳片３
となる。また、タンデイツシユ５内の溶湯量を重
量計７によつて測定し、タンデイツシユ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′間に溶湯４が一定供給される。ま
た、ロール１，１′の反力をロードセル１２，１
２′により検出し適正ロール間溶湯レベルを算出
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 rolls 1 and 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. In addition, fixed weirs 2, 2' made of refractory material are pressed against both ends of the water-cooled casting rolls 1, 1' to seal the sides, and the two water-cooled casting rolls 1, 1' and the two Molten metal 4 is poured into the space formed by the fixed weirs 2 and 2' by an immersion nozzle 6. The poured molten metal is cooled by contacting the surfaces of the water-cooled casting rolls 1 and 1', and the solidified shell that is formed is integrated with the rotation of the rolls 1 and 1' and forms the slab 3.
becomes. Further, after measuring the amount of molten metal in the tundish 5 using a weighing scale 7 and calculating the molten metal level in the tundish 5, the slide valve 10 is opened and closed to supply a constant amount of molten metal 4 between the rolls 1 and 1'. Also, the reaction force of the rolls 1, 1' is expressed by the load cells 12, 1
2' and after calculating the appropriate inter-roll molten metal level, 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浸漬ノズル６を上下させ
る方法について説明する。操業中のロール１，
１′の反力をロードセル１２，１２′により検出し
浸漬ノズル６を上下することにより、溶湯へのノ
ズル浸漬部の体積を変化させ、ロール間の溶湯レ
ベルを適宜上・下し、過凝固、未凝固のない鋳片
を製造する。 In the thin plate continuous casting apparatus described above, the slab 3
A method of moving the immersion nozzle 6 up and down in order to maintain good properties will be explained. Roll 1 in operation,
1' reaction force is detected by the load cells 12, 12' and the immersion nozzle 6 is moved up and down to change the volume of the nozzle immersion part into the molten metal, raise or lower the molten metal level between the rolls as appropriate, and prevent over-solidification, Manufacture slabs without unsolidified solidification.
以上本発明を詳細に説明したが、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 further 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2000mm
φ、ロール幅1200mm。鋳片寸法は３mmｔ×1200
mm幅であり、このときのロール回転速度（鋳造
速度）は約28ｍ／minである。(1) Water-cooled casting roll Made of steel and internally water-cooled. Roll diameter is 2000mm
φ, roll width 1200mm. Slab size is 3mmt x 1200
mm width, and the roll rotation speed (casting speed) at this time is about 28 m/min.
(2) 浸漬ノズル
アルミナグラフア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イツシユ内溶湯温度は
1520〜1560℃である。(3) Molten metal For ordinary steel, the temperature of the molten metal in the tundish is
The temperature is 1520-1560℃.
以上の諸条件で反力が0.5トン以下となつた場
合浸漬ノズルを10mm下げ、１トン以上となつた場
合10mm上げて鋳造した結果、表面割れ、および、
バルジングのない良好な性状を有する鋳片が安定
して得られた。 Under the above conditions, if the reaction force was 0.5 tons or less, the immersion nozzle was lowered by 10 mm, and if it was 1 ton or more, the immersion nozzle was raised by 10 mm. As a result, surface cracks and
A slab with good properties and no bulging was stably obtained.
本発明は、以上詳記したように、ロールの反力
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、溶湯へのノズル浸
漬部の体積を変化させることができ、これによつ
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。その結果、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ある。
As described in detail above, the present invention detects the reaction force of the roll and moves the immersion nozzle up and down based on this detected value, so it is possible to change the volume of the nozzle immersion part into the molten metal. 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. As a result, the present invention has the effect of producing 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。
FIG. 1 is a longitudinal sectional view of a continuous thin plate casting apparatus for carrying out the present invention.
Claims (1)
ール間に浸漬ノズルを介して溶湯を供給し、ロー
ルの下方より帯状金属薄板を取り出す連続鋳造方
法において、上記ロールの反力を測定し、測定値
に対応して上記ノズルの浸漬深さを変化させて溶
湯レベルを調節することにより、ロール中立点に
おける凝固シエルの厚さを一定範囲に制御するこ
とを特徴とする連続鋳造方法。1. In a continuous casting method in which molten metal is supplied through an immersion nozzle between two casting rolls placed a certain distance apart and a strip metal sheet is taken out from below the rolls, the reaction force of the rolls is measured. A continuous casting method, characterized in that the thickness of the solidified shell at the neutral point of the roll is controlled within a certain range by adjusting the molten metal level by changing the immersion depth of the nozzle in accordance with the measured value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26180384A JPH0249181B2 (en) | 1984-12-13 | 1984-12-13 | RENZOKUCHUZOHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26180384A JPH0249181B2 (en) | 1984-12-13 | 1984-12-13 | RENZOKUCHUZOHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61140361A JPS61140361A (en) | 1986-06-27 |
| JPH0249181B2 true JPH0249181B2 (en) | 1990-10-29 |
Family
ID=17366926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26180384A Expired - Lifetime JPH0249181B2 (en) | 1984-12-13 | 1984-12-13 | RENZOKUCHUZOHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249181B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009248129A (en) * | 2008-04-07 | 2009-10-29 | Ihi Corp | Strip casting method and twin roll casting machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100424822B1 (en) * | 1998-12-29 | 2004-06-30 | 주식회사 포스코 | Method of controlling a steel in tundish |
| KR100957949B1 (en) * | 2002-09-30 | 2010-05-13 | 주식회사 포스코 | Continuous casting method by calculating melten steel level of tundish in continuous casting equipment |
| JP7207107B2 (en) * | 2019-04-03 | 2023-01-18 | 日本製鉄株式会社 | Method for producing thin cast slab |
-
1984
- 1984-12-13 JP JP26180384A patent/JPH0249181B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009248129A (en) * | 2008-04-07 | 2009-10-29 | Ihi Corp | Strip casting method and twin roll casting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61140361A (en) | 1986-06-27 |
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