JPH0347945B2 - - Google Patents
Info
- Publication number
- JPH0347945B2 JPH0347945B2 JP6080385A JP6080385A JPH0347945B2 JP H0347945 B2 JPH0347945 B2 JP H0347945B2 JP 6080385 A JP6080385 A JP 6080385A JP 6080385 A JP6080385 A JP 6080385A JP H0347945 B2 JPH0347945 B2 JP H0347945B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- pouring
- drum
- nozzle
- drums
- 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
Links
- 239000002184 metal Substances 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 238000005266 casting Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 11
- 238000007654 immersion Methods 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 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
- 238000005336 cracking Methods 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、薄板連続鋳造方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a continuous thin plate casting method.
（従来の技術）
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による薄板連続鋳造法で
は、ドラム面上で生成される凝固シエルの厚さを
厳密に制御することが鋳片の性状を良好に保つた
めの必須の要件である。時に注湯開始から定常状
態となるまでの非定常状態（ドラム回転速度及び
湯面高さが所定値まで増加する状態）では、ドラ
ム回転速度ならびに湯面高さが時間とともに変化
するため、未凝固による湯もれ、あるいは過凝固
による割れ等が発生しやすく、よりいつそう厳密
に凝固シエルの厚さを制御する必要がある。しか
し、従来の方法では、注湯ノズルが高い位置にあ
るため（ドラム中立点と注湯ノズル先端との距離
が長く、定常状態での湯面よりも高い位置にあ
る）、以下に述べる欠点があり、凝固シエル厚さ
の制御が充分でなく、また鋳造性状も満足できる
ものではなかつた。(Prior art) In the twin-drum continuous thin plate casting method in which molten metal is poured between two drums and thin plates are continuously cast, it is important to strictly control the thickness of the solidified shell produced on the drum surface. This is an essential requirement to maintain good properties of the pieces. Sometimes, in an unsteady state from the start of pouring to a steady state (a state in which the drum rotation speed and surface height increase to a predetermined value), the drum rotation speed and surface height change over time, causing unsolidified The thickness of the solidified shell needs to be controlled more precisely as it is more likely to cause leakage or cracking due to over-solidification. However, in the conventional method, because the pouring nozzle is located at a high position (the distance between the neutral point of the drum and the tip of the pouring nozzle is long, and it is at a position higher than the melt level in a steady state), it has the following disadvantages. However, the thickness of the solidified shell was not sufficiently controlled, and the casting properties were also not satisfactory.
(1) 注湯開始時に溶湯がドラム面に当たり、凝固
シエルの生成を阻害する欠点を有する。なお、
これは注湯流によるシエルの洗い現像という。(1) The molten metal hits the drum surface at the start of pouring, which has the disadvantage of inhibiting the formation of a solidified shell. In addition,
This is called washing and development of shells by pouring water.
(2) 非定常状態でのドラム間の溶湯が流動するた
め、湯じわ等の発生が著しく、鋳片表面性状を
害する欠点を有する。(2) Since the molten metal flows between the drums in an unsteady state, the occurrence of molten metal wrinkles is significant, which has the disadvantage of damaging the surface quality of the slab.
（発明が解決しようとする問題点）
本発明は、従来手段の上記欠点を解消し、凝固
のシエルの生成阻害を防ぎ、かつ、溶湯の流動を
最小限におさえる薄板連続鋳造方法を提供するこ
とを目的とする。(Problems to be Solved by the Invention) The present invention provides a thin plate continuous casting method that eliminates the above-mentioned drawbacks of conventional means, prevents inhibition of solidification shell formation, and minimizes flow of molten metal. With the goal.
（問題点を解決するための手段）
本発明は、上記目的を達成する手段として、注
湯流がドラム面に当たらないよう、注湯ノズル先
端を極力ドラム中立点に近づけた状態で注湯を開
始し、湯面の上昇と共に、一定の浸漬深さに保つ
たまま、ノズルを上昇させる（注湯により湯面が
上昇し、注湯ノズル先端が一定量浸漬した状態の
まま湯面の上昇速度と同速度にて注湯ノズルを上
昇させる）点にある。すなわち、本発明は製造す
る金属帯板厚に相当する間隙を置いて水平に並設
した互いに回転方向を異にする２本の水冷鋳造ド
ラムとこれらドラムの端面に押し当てた２個の固
定せきによつて形成される空間に溶湯を注ぎ薄板
鋳片を得る連続鋳造方法において、注湯ノズル先
端を極力ドラムの中立点に近づけた状態で注湯を
開始し、一定の浸漬深さを保ちながら湯面が所定
レベル位置に達するまで該ノズル上昇させること
を特徴とする薄板連続鋳造方法である。(Means for Solving the Problems) The present invention, as a means to achieve the above object, pours molten metal while keeping the tip of the molten metal pouring nozzle as close to the neutral point of the drum as possible so that the molten metal flow does not hit the drum surface. As the molten metal level rises, the nozzle is raised while keeping it at a constant immersion depth. (the pouring nozzle is raised at the same speed as ). That is, the present invention consists of two water-cooled casting drums that are arranged horizontally in parallel with a gap corresponding to the thickness of the metal strip to be manufactured and that rotate in different directions, and two fixed weirs that are pressed against the end surfaces of these drums. In the continuous casting method to obtain thin plate slabs by pouring molten metal into the space formed by This continuous thin plate casting method is characterized in that the nozzle is raised until the molten metal level reaches a predetermined level.
以下、本発明を第１図に基づいて詳細ち説明す
る。第１図は本発明を実施するのに好適な薄板連
続鋳造装置の縦断面図である。第１図に示す装置
は薄板鋳片３を鋳造する冷水鋳造ドラム１，１′
冷水鋳造ドラム１，１′間の溶湯４の洩れを防止
するサイド固定さき２，２′、溶鋼等の溶湯４を
溜めるタンデイツシユ５及び注湯ノズル６などを
主要構成要素としている。この装置を詳細に説明
すると、冷水鋳造ドラム１，１′は、水平に並設
されており、図示しない駆動装置により回転（矢
印方向）駆動される。こと水冷鋳造ドラム１，
１′は例えば、銅または銅合金、あるいは、鋼材
により中空のドラムに形成され、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ドラムとなつている。ま
た、水冷鋳造ドラム１，１′の両端部には、サイ
ドをシールするための耐火剤からなる固定せき
２，２′が押し当てられている。さらに、溶湯４
を溜めるタンデイツシユ５の下方に耐火材からな
り、油圧あるいは、電動モータにより上下に伸長
もしくは短縮するテレスコピツクの二重管からな
る注湯ノズル６が設置されており、この伸縮自在
な注湯ノズル６により、２本の水冷鋳造ドラム
１，１′と２個の固定せき２，２′で形成される空
間に溶湯４が注湯される。溶湯４が水冷鋳造ドラ
ム１，１′の表面に夫々接触して冷却され、でき
た凝固シエルは該ドラムの回転に伴つて一体化さ
れ鋳造片３となるこの鋳片はピンチロール７によ
り引抜かれる。なお８はガイドローラである。 Hereinafter, the present invention will be explained in detail based on FIG. FIG. 1 is a longitudinal sectional view of a continuous thin plate casting apparatus suitable for carrying out the present invention. The apparatus shown in FIG. 1 is a cold water casting drum 1, 1' for casting a thin slab 3.
The main components include side fixing holes 2 and 2' for preventing leakage of molten metal 4 between cold water casting drums 1 and 1', a tundish 5 for storing molten metal 4 such as molten steel, and a pouring nozzle 6. To explain this apparatus in detail, cold water casting drums 1 and 1' are arranged horizontally in parallel and are driven to rotate (in the direction of the arrow) by a drive device (not shown). water-cooled casting drum 1,
1' is a hollow drum made of, for example, copper, copper alloy, or steel, and has a built-in water cooling mechanism, and has a fairly large diameter to obtain a large contact area with the molten metal 4. There is. Further, fixed weirs 2, 2' made of fireproofing material are pressed against both ends of the water-cooled casting drums 1, 1' to seal the sides. Furthermore, molten metal 4
A pouring nozzle 6 made of refractory material and consisting of a telescopic double pipe that can be vertically extended or shortened by hydraulic pressure or an electric motor is installed below the tundish 5 that stores water. Molten metal 4 is poured into a space formed by two water-cooled casting drums 1, 1' and two fixed weirs 2, 2'. The molten metal 4 is cooled by contacting the surfaces of the water-cooled casting drums 1 and 1', and the solidified shells formed are integrated as the drums rotate, forming the cast piece 3. This piece is pulled out by pinch rolls 7. . Note that 8 is a guide roller.
上記装置において、本発明は、伸縮自在な注湯
ノズル６を伸長させて極力ドラム中立点（水冷鋳
造ドラム１，１′両週面の再接近位置）に近づけ
た状態で注湯を開始し、注湯ノズル６の先端が溶
湯に所定深さに浸漬した段階で注湯ノズル６の先
端の浸漬深さを一定（10〜20mm）に保ちながら、
所定場面レベルまで場面レベルの上昇とい共に注
湯ノズル６の先端を上昇させる。 In the above apparatus, the present invention starts pouring with the telescopic pouring nozzle 6 extended as close as possible to the neutral point of the drum (the position where both the water-cooled casting drums 1 and 1' are close to each other), When the tip of the pouring nozzle 6 is immersed in the molten metal to a predetermined depth, while keeping the immersion depth of the tip of the pouring nozzle 6 constant (10 to 20 mm),
As the scene level rises to a predetermined scene level, the tip of the pouring nozzle 6 is raised.
注湯を開始した後、所定レベル位置まで場面を
上昇させる方法としては、注湯流量を始めに多
くし、徐々に定常流量にする注湯流量制御による
方法（インプツト制御）、冷却ドラムの回転速
度を徐々に高める方法（アウトプツト制御）、又
は、注湯流量及びドラム回転速度を制御する方
法が知られているが、注湯初期の非定常状態を短
くするためには、の方法がい優れている。 After starting pouring, methods for raising the level to a predetermined level include: increasing the pouring flow rate at first and gradually increasing it to a steady flow rate (input control); and controlling the rotational speed of the cooling drum. A method of gradually increasing the molten metal (output control) or a method of controlling the pouring flow rate and drum rotation speed is known, but the following method is better in order to shorten the unsteady state at the initial stage of pouring. .
以上本発明の実施例として、進出自在な注湯ノ
ズルを使用し、溶湯への浸漬深さを調節するよう
にしているが、場合によつては、該ノズルを固定
式とし、タンデイツシユ自体を上下移動可能に構
成して、付属する注湯ノズルの溶湯への浸漬深さ
を調節するようにすることもでき、これも本発明
に包含されるものである。 As described above, in the embodiment of the present invention, a movable pouring nozzle is used to adjust the depth of immersion into the molten metal. It can also be configured to be movable so that the immersion depth of the attached pouring nozzle into the molten metal can be adjusted, and this is also encompassed by the present invention.
以上本発明を詳細に説明したが、さらに本発明
の具体例をあげて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 component parts when steel is cast are as follows.
(1) 水冷鋳造ドラム
鋼製で内部水冷方式のものであり、このドラ
ム直径は2000mmφ、ラム幅1200mmである。鋳片
寸法は３mmt×1200mm幅であり、定常状態での
ドラム回転速度（鋳造速度）は役28ｍ／minで
ある。(1) Water-cooled casting drum This drum is made of steel and has an internal water-cooling system.The drum diameter is 2000mmφ and the ram width is 1200mm. The dimensions of the slab are 3 mm x 1200 mm wide, and the drum rotation speed (casting speed) in steady state is 28 m/min.
(2) 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。また水冷鋳造ドラム
上の溶湯のヘツドは約500mmである。(2) Molten metal In the case of normal steel, the temperature of the molten metal in the tundish is 1520 to 1560°C. The head of the molten metal on the water-cooled casting drum is approximately 500 mm.
(3) 注湯ノズル
材質は、Si3N4であり、上下移動は油圧によ
り行つた。(3) Pouring nozzle The material was Si 3 N 4 , and vertical movement was performed using hydraulic pressure.
以上の諸条件で鋳造し、湯もれ等の操業トラル
もなく、良好な鋳片を安定して得ることができ
た。 Casting was carried out under the above conditions, and a good slab could be stably obtained without any operational problems such as leakage.
本発明は、以上詳記したように、注湯ノズル先
端を極力ドラムの中立点に近づけた状態で注湯を
開始し、一定の浸漬深さを保持しながら該ノズル
を所定レベル位置まで上昇させるものであるか
ら、注湯開始直後の注湯流による凝固シエル生成
の阻害を防止し、ドラム間の溶湯流動を極力おさ
え、非定常状態での鋳造を安定化し、良好な鋳片
を得ることができる効果が生ずる。
As detailed above, the present invention starts pouring with the tip of the pouring nozzle as close to the neutral point of the drum as possible, and raises the nozzle to a predetermined level while maintaining a constant immersion depth. Therefore, it is possible to prevent the formation of a solidified shell due to the pouring flow immediately after pouring starts, to suppress the flow of molten metal between the drums as much as possible, to stabilize casting in an unsteady state, and to obtain good slabs. The effect that can be achieved is produced.
第１図は本発明を実施するのに好適な薄板連続
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 suitable for carrying out the present invention.
Claims (1)
水平に並設した互いに回転方向を異にする２本の
水冷鋳造ドラムとこれらドラムの端面に押し当て
た２個の固定せきによつて形成される空間に溶湯
を注ぎ薄板鋳片を得る連続鋳造方法において、注
湯ノズル先端を極力ドラムの中立点に近づけた状
態で注湯を開始し、一定の浸漬深さを保ちなが
ら、湯面が所定レベル位置に達するまで該ノズル
を上昇させることを特徴とする薄板連続鋳造方
法。1. By using two water-cooled casting drums that rotate in different directions, placed horizontally in parallel with a distance corresponding to the thickness of the metal strip to be manufactured, and two fixed weirs pressed against the end faces of these drums. In the continuous casting method to obtain thin plate slabs by pouring molten metal into the formed space, pouring is started with the tip of the pouring nozzle as close as possible to the neutral point of the drum, and while maintaining a constant immersion depth, the molten metal surface is 1. A continuous thin plate casting method, characterized in that the nozzle is raised until the nozzle reaches a predetermined level position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6080385A JPS61219449A (en) | 1985-03-27 | 1985-03-27 | Continuous casting method for thin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6080385A JPS61219449A (en) | 1985-03-27 | 1985-03-27 | Continuous casting method for thin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61219449A JPS61219449A (en) | 1986-09-29 |
| JPH0347945B2 true JPH0347945B2 (en) | 1991-07-22 |
Family
ID=13152854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6080385A Granted JPS61219449A (en) | 1985-03-27 | 1985-03-27 | Continuous casting method for thin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61219449A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2591098B2 (en) * | 1988-07-26 | 1997-03-19 | 石川島播磨重工業株式会社 | Twin roll continuous casting machine |
| JP5480787B2 (en) * | 2010-11-30 | 2014-04-23 | 三菱日立製鉄機械株式会社 | Twin roll type continuous casting machine and twin roll type continuous casting method |
-
1985
- 1985-03-27 JP JP6080385A patent/JPS61219449A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61219449A (en) | 1986-09-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |