JPH0475750A - Method and apparatus for continuously casting duplex layer cast slab - Google Patents
Method and apparatus for continuously casting duplex layer cast slabInfo
- Publication number
- JPH0475750A JPH0475750A JP18806990A JP18806990A JPH0475750A JP H0475750 A JPH0475750 A JP H0475750A JP 18806990 A JP18806990 A JP 18806990A JP 18806990 A JP18806990 A JP 18806990A JP H0475750 A JPH0475750 A JP H0475750A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- mold
- injection nozzle
- tundish
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000005266 casting Methods 0.000 title abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims description 54
- 239000007924 injection Substances 0.000 claims description 54
- 239000010410 layer Substances 0.000 claims description 38
- 238000009749 continuous casting Methods 0.000 claims description 6
- 238000005058 metal casting Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 abstract description 32
- 229910052751 metal Inorganic materials 0.000 abstract description 32
- 230000001105 regulatory effect Effects 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 241000282373 Panthera pardus Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、表層部と内層部の組成の異なる複合鋼材用複
層鋳片を連続的に鋳造する方法及び装置に関するもので
あるや
従来の技術
連続鋳造設備において複層鋳片を製造する方法として、
例えば特開平１−２７１０４１では内層用金属を収容す
る空間部を形成したことを特徴とする技術が提案されて
いる。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method and apparatus for continuously casting multi-layer slabs for composite steel materials with different compositions in the surface layer and inner layer. As a method for manufacturing multilayer slabs in casting equipment,
For example, Japanese Patent Application Laid-Open No. 1-271041 proposes a technique characterized by forming a space for accommodating metal for the inner layer.
この技術は、鋳造開始時、鋳型内にセットされるダミー
バの先端部に内層用金属注入用の長い注入ノズルからの
溶鋼を収容する空間部を形成１２、この空間に内層用金
属を注入した後、表層用金属を短いノズルから注入する
ことにより鋳造開始初期から表層部が目標成分を持ち、
歩留まり良く複層鋳片を製造することを目的としている
。In this technology, at the start of casting, a space is formed at the tip of a dummy bar set in the mold to accommodate molten steel from a long injection nozzle for injecting metal for the inner layer12, and after the metal for the inner layer is injected into this space. By injecting the surface layer metal through a short nozzle, the surface layer has the target components from the beginning of casting.
The purpose is to manufacture multi-layer slabs with high yield.
発明が解決しようとする課題
特開平１−２７１０４１に開示された従来技術において
は１次のような解決すべＳ！題がある。Problems to be Solved by the Invention In the prior art disclosed in Japanese Unexamined Patent Publication No. 1-271041, the following problems can be solved: There is a problem.
（１）一般に初期注入溶鋼は、鋳型に至るまでに通過す
るタンデッシュや注入ノズルによってその熱が奪われ溶
鋼温度は低下する傾向にある。したがって注入ノズルは
長い程、溶鋼温度は低下しやすく、ノズル詰まりは発生
しやすくなる。(1) In general, the temperature of the molten steel tends to decrease as the heat is removed from the molten steel initially poured by the tundish and injection nozzle that it passes through before reaching the mold. Therefore, the longer the injection nozzle is, the more likely the temperature of the molten steel is to drop, and the more likely the nozzle is to become clogged.
（２）また、ノズル詰まりが発生しない場合においても
長い注入ノズルから注入された溶鋼はダミーバ先端部に
設けられた空間部において早期に凝固しダミーバ引き抜
き時ノズルがこの凝固部と一緒に下方に引き抜かれ折損
する可能性が高い。(2) Even when nozzle clogging does not occur, the molten steel injected from the long injection nozzle solidifies early in the space provided at the tip of the dummy bar, and when the dummy bar is pulled out, the nozzle is pulled downward together with this solidified part. There is a high possibility that it will be pulled out and break.
（３）前記（２）項のごときトラブルを避けるためには
、溶鋼の注入開始から引き抜き開始の時間を極力短くす
る必要があるが、このことによりブレークアウトやシー
ル漏れ等の操業トラブルを誘発する可能性が高くなる。(3) In order to avoid troubles such as those mentioned in (2) above, it is necessary to shorten the time from the start of molten steel injection to the start of withdrawal as much as possible, but this can lead to operational troubles such as breakouts and seal leaks. More likely.
課題を解決するための手段
かかる問題点を解決するため本発明は下記の手段を有す
る。Means for Solving the Problems In order to solve these problems, the present invention has the following means.
１、長さの異なる２本の注入ノズルを用いて複層鋳片を
製造する連続鋳造において、先に短い注入ノズルで鋳型
内への溶鋼注入を行い、一定量注入後、内層部溶融金属
用鋳鍋と、長い注入ノズルを有するタンデッシュがダミ
ーバ引き抜きと連動して下降するようにし、長い注入ノ
ズルが鋳型の溶鋼内に浸漬後注入を開始する様にしたこ
とを特徴とする複層鋳片用連続鋳造方法。1. In continuous casting, where two injection nozzles of different lengths are used to manufacture multi-layer slabs, molten steel is first injected into the mold using a short injection nozzle, and after a certain amount has been injected, the inner layer molten metal is poured into the mold. For multilayer slabs, characterized in that a casting pot and a tundish having a long injection nozzle are lowered in conjunction with the withdrawal of the dummy bar, and the long injection nozzle starts injection after being immersed in the molten steel of the mold. Continuous casting method.
２、注入ノズルを有する表層部溶融金属用鋳鍋と、内層
部溶融金属用鋳鍋を搭載し、該２つの鍋の昇降を独立に
て可能とした鋳鋼台車と、長い注入ノズルを有するタン
デッシュと、短い注入ノズルを有するタンデッシュを搭
載し、該２つのタンデッシュの昇降を独立にて可能とし
たタンデッシュカーにより構成されることを特徴とする
複層鋳片用連続鋳造装置。2. A cast steel truck equipped with a casting pot for surface molten metal having an injection nozzle and a casting pot for inner molten metal and capable of raising and lowering the two pots independently, and a tundish having a long injection nozzle. A continuous casting apparatus for multi-layer slabs, characterized in that it is constituted by a tundish car equipped with a tundish having a short injection nozzle and capable of raising and lowering the two tundishes independently.
作用
１つの鋳鍋台車に表層部溶融金属用鋳鍋と、内層部溶融
金属用鋳鍋を搭載し、該鋳鍋の昇降を独立にて可能とし
、さらに該鋳鍋からの溶鋼を受ける内層金属用長い注入
ノズルを有するタンデッシュと、表層金属用短い注入ノ
ズルを有するタンデッシュを設け、これら２つのタンデ
ッシュを独立にて昇降可能とした１つのタンデッシュカ
ーに搭載し、短いノズル側のタンデッシュから鋳型内へ
の溶鋼注入を行い、一定量注入後、内層部溶融金属用鋳
鍋と、長い注入ノズルを有するタンデッシュがダミーバ
引き抜きと連動して下降し長い注入ノズルの先端部が鋳
型自溶鋼に浸漬開始した時点で長い注入ノズルで内層用
金属の注入を開始する。この結果、注入初期においても
溶鋼温度の低下が最小限に押さえられ、ノズル詰まり等
のトラブルが防止できる。A cast pot for the surface molten metal and a cast pot for the inner molten metal are mounted on a single cast pot cart, and the cast pot can be raised and lowered independently, and the inner layer metal can receive the molten metal from the cast pot. A tundish with a long injection nozzle for surface metals and a tundish with a short injection nozzle for surface metals are installed, and these two tundeshes are mounted on a single tundish car that can be raised and lowered independently. After injecting a certain amount of molten steel, the inner molten metal ladle and the tundish with a long injection nozzle descended in conjunction with the dummy bar withdrawal, and the tip of the long injection nozzle began to immerse into the self-molten steel of the mold. At this point, begin implanting the inner layer metal with a long injection nozzle. As a result, the drop in molten steel temperature is kept to a minimum even in the initial stage of injection, and troubles such as nozzle clogging can be prevented.
実施例
本発明の連続鋳造方法及び装置の一実施例について第１
図、第２図、第３図、第４図により説明する。Embodiment First embodiment of the continuous casting method and apparatus of the present invention
This will be explained with reference to FIGS. 2, 3, and 4.
第１図に注入開始前から定常鋳造状態になるまでの作動
順序を示す、（イ）は注入開始前であり、鋳型ｌ内にダ
ミーバ２がセットされ４鋳型上部にはロングノズル４を
有する内層金属用鋳鍋５、長い注入ノズルを有）る内層
金属用タンデッシュ７、同様にロングノズル４を有する
外層金属用鋳鍋８、短い注入ノズル９を有する外層金属
用タンデッシュ１０が、また鋳造時、内層金属及び外層
金属の分離を図るための一様磁場装置１１が鋳型の周り
に、それぞれ設けられている。Figure 1 shows the operating sequence from before the start of injection until the steady casting state is reached. (A) is before the start of injection, with a dummy bar 2 set in the mold 1 and an inner layer with a long nozzle 4 at the top of the mold. A metal casting pot 5, an inner metal tundish 7 with a long injection nozzle, an outer metal casting pot 8 also with a long injection nozzle 4, an outer metal tundish 10 with a short injection nozzle 9, and also during casting. A uniform magnetic field device 11 for separating the inner layer metal and the outer layer metal is provided around each mold.
本実施例では、鋳型長さ（ａ） ９００１腸で各注入ノ
ズル及びダミーバのセット位置は第１図に示す通りであ
る（ｂ−ｓｏｏ、ｃ−３００）、 （イ）の状態から
、先ず鋳鍋８内の外層用溶鋼がロングノズル４′、タン
デッシュ１０を介して短い注入ノズル９から鋳型１内へ
と注入される。注入開始と共に鋳型ｌ内での溶鋼面（湯
面）が上昇し、規定のレベル（鋳型上端から約１００ｍ
５）に到達後鋳型ｌ内のダミーバ２がピンチロールによ
り下方に引き抜き開始される。このダミーバ・２の引き
抜き開始と同時に鋳鍋５及びタンブラシュアが下降を開
始する。そして注入ノズル６からの内層用溶鋼の鋳型ｌ
内への注入開始は第１図（ロ）に示す通り、鋳型上端（
ｆ）１５０層■の位置、即ち湯面から５０＋＋＋ｍ溶鋼
内に挿入された点にて行われる（ｄ＝９００． ｅ−８
５０、ｇ−１００）、定常鋳造状態は第１１遁（ハ）に
示す通りで、注入ノズル６の先端が鋳型１の下架；から
１００開の点に到達後、鋳鍋５及びタンブラシュアの下
降が停止されるよう（、：なっている、
ダミーパの引さ扶きと、内層用溶鋼の注入ノズルの下降
開始から定常状虐ｉになるまでの引き抜き速度及び下降
速度、並び）７ζダミーバの上端と内層用溶銅の注入ノ
ズル先端の位ｔは第２図に示す通りである。即ち、ダミ
＝−バの引き抜きは鋳造の安定性確保の面から徐々に速
度アクブすることが望ｔ Ｌ、、 ＜、一方、内層用溶
鋼の注入ノズルの下降速度はｉ型内初期凝固殻確保の面
からグミ Ａ上端との間の距離を朽力大きく取ること、
その」−内層用と９＋層用溶銅の分外ができるだけ早い
時期に達成されるようにすることの、二つの面から決定
することが必要である９本実施例では、第２図に示す方
法ｌζて行うことにより、鋳造開始時期での安定操業と
、定常状態になるまでに発生する内層用溶鋼と夕１層用
溶銅の混市部の長さを最小としている。In this example, the mold length (a) is 9001 mm, and the setting positions of each injection nozzle and dummy bar are as shown in Fig. 1 (b-soo, c-300). Molten steel for the outer layer in the ladle 8 is injected into the mold 1 from a short injection nozzle 9 via a long nozzle 4' and a tundish 10. As injection begins, the molten steel level in the mold 1 rises and reaches a specified level (approximately 100 m from the top of the mold).
After reaching step 5), the dummy bar 2 in the mold 1 starts to be pulled out downward by the pinch rolls. Simultaneously with the start of pulling out the dummy bar 2, the casting pot 5 and the tumbler Sure start descending. And mold l of molten steel for inner layer from injection nozzle 6
As shown in Figure 1 (b), injection into the mold starts at the upper end of the mold (
f) Performed at the 150th layer ■ position, that is, the point inserted into the molten steel 50+++ m from the molten metal surface (d = 900. e-8
50, g-100), the steady casting state is as shown in the 11th statement (c), and after the tip of the injection nozzle 6 reaches the 100-degree open point from the lower frame of the mold 1, the casting pot 5 and tumbler sure are closed. The pulling force of the dummy bar, the withdrawal speed and descending speed from the start of descent of the inner layer molten steel injection nozzle until the steady state is reached, and the 7ζ dummy bar so that the descent is stopped. The position t of the upper end and the tip of the injection nozzle for the molten copper for the inner layer is as shown in FIG. In other words, it is desirable to gradually increase the drawing speed of the dummy bar from the viewpoint of ensuring casting stability. On the other hand, the descending speed of the injection nozzle for the molten steel for the inner layer is set to ensure the initial solidification shell in the i-type. Make a large distance between the surface and the top of Gummy A,
In this example, it is necessary to make a decision from two aspects: to ensure that the distribution of molten copper for the inner layer and for the 9+ layer is achieved as early as possible. By carrying out method 1ζ, stable operation is achieved at the start of casting, and the length of the mixing area of molten steel for the inner layer and molten copper for the first layer, which occurs until a steady state is reached, is minimized.
次に第３図により、上記方法にお６るダ’ｇ −／＜引
き抜きと、鋳鍋及びタンプッシｊ下降の連動のための制
御例を説明する。本図は鋳造開始前の状態を示１〜でお
り、この状態から、先ず内層用溶鋼が注入ノズル９かも
注入され、前述のごとく湯面が規定レベルに到達後グミ
ーパ２の引き抜きがビンチロ・−ル１２により開始され
るど同時に、タン７？ツシ３７及び鋳鍋５が、それぞれ
自動的に下降開始する、タンチー、シュアはタンデー、
シ、力〜２９七（、゛設乞ツトクれた昇降装が２６によ
り、また鋳鍋５はｉ鍋支持装鈴２７の昇に装と２５にＪ
、す、それ−Ｆ引１昇降叶能となっ”Ｃいる、引８抜き
開始からのダミーへの移動距離は、ビンヂロール駆動モ
ータ１３に取り付けられた、引き抜き長さ検出器２１よ
り演算ｙＪと２２に伝送さ４１７、演算装Ｂ２２内の速
度位行制ｎ閃箭旧２３−１．２３−２がそれぞれタンデ
ッシュ７及び鋳鍋５の下降速度及び位ｎを第２図の様に
制御する構成となっている。Next, with reference to FIG. 3, an example of control for interlocking the pulling out of the casting pot and the lowering of the casting pot and tongue pusher in the above method will be explained. This figure shows the state before starting casting. From this state, the molten steel for the inner layer is first injected into the injection nozzle 9, and as mentioned above, after the molten metal level reaches the specified level, the gummy pad 2 is pulled out. At the same time when it is started by Le 12, Tan 7? Tsushi 37 and casting pot 5 automatically start descending.
297 (The installed lifting gear is 26, and the casting pot 5 is equipped with the lifting gear 27 and 25.
The moving distance to the dummy from the start of pulling 8 is calculated by yJ and 22 from the pulling length detector 21 attached to the binge roll drive motor 13. 417, and the speed position control n flash control 23-1. It has become.
また、本発明による構造を第４図にＪテり説明する、本
図は定常鋳造状態を示す。Further, the structure according to the present invention is illustrated in FIG. 4, which shows a steady state of casting.
内層金尼用鋳望５及び外層金に用鋳鍋８はそれぞれ鋳鍋
支持装置２７．２７′の支持アーム２１．２１′に搭峠
され、昇降装置２５．２５′の昇降ジヤツキ−１８，１
８′により支持７−ムを揺動させることにより昇眸Ｉｉ
Ｔ能となっている。鋳鍋５及び８の下部には内層金属用
タンデー、ン３７、外層金ぼ用タンプツシ１．ｌＯを搭
穀するタンデー２シ、カー２３が設けられている２タン
プツシユカー２９は、内層金属用タンブラシュアを支持
する））／−ム２８、そ１７て、これを昇降可能とする
昇降装と１７、同様に、外層金属用タンプツシ、５．１
０を支持するフ１／−ム２８′そ１−て、これを昇降可
能とする昇腎装行１７′を備えている。タンブラシュア
には鋳型１の下端から約１００ｍ鵬の位置に溶鋼噴出口
を有する注入ノズル６が、また、タンデッシュ１０には
鋳型１の上部に溶鋼噴出口を有する注入ノズル９が取り
付けられている。The casting pan 5 for the inner layer metal and the casting pot 8 for the outer layer metal are respectively mounted on the support arms 21.21' of the ladle support device 27.27', and the lifting jacks 18, 1 of the lifting device 25.25'.
By swinging the support 7-m by 8', the elevation Ii can be achieved.
It has become T-Noh. At the bottom of the casting pots 5 and 8, there are tandems 37 for the inner layer metal, and tamps 1 for the outer layer metal. A tumbler 29, which is provided with a tundish 2 for milling lO and a car 23, supports a tumbler surer for the inner layer metal 28, and a lifting device 17 that allows it to be raised and lowered. , Similarly, a tamp for outer layer metal, 5.1
The frame 28' supporting the frame 28' is provided with an elevator 17' that allows the frame to be raised and lowered. An injection nozzle 6 having a molten steel spout is attached to the tumbler at a position approximately 100 m from the lower end of the mold 1, and an injection nozzle 9 having a molten steel spout at the top of the mold 1 is attached to the tundish 10.
発明の効果
本発明はにｌのような構成としたことから次のような効
果を右する。Effects of the Invention Since the present invention is configured as shown in FIG. 1, it has the following effects.
１、短い注入ノズルを有するタン７ツショ側から鋳型へ
、の溶銅注入を開始し７、鋳型内に一定研注入し、−・
定時間保持１７た後、ダミ・−／へ引き抜きを開始１２
、これと連動し、てＲい注入ノズルを有するタンプツシ
、を下降させ、該ノズル先端部が豹型内溶鋼ｌ、″浸漬
開始した後で長いノズルからの注入を開始場−るように
ｌ、たことから、注入初期におりる長い注入ノズルのノ
ズル詰まり防止が可能とかった。1. Start pouring molten copper into the mold from the tank side with a short injection nozzle.
After holding for a certain time 17, start pulling out to the dummy -/12
In conjunction with this, a tamp with a round injection nozzle is lowered so that the tip of the nozzle becomes a point where injection from a long nozzle starts after the molten steel begins to be immersed in the leopard shape. This made it possible to prevent the long injection nozzle from clogging during the early stages of injection.
２、また、鋳型内Ｕ−溶鋼注入後一定時間保持してから
ダミーバ引き抜きを開始するように１．たことからブレ
ークアウトやシール漏れ等の操業事故の発生がなくなっ
た。2. Also, after injecting the U-molten steel into the mold, hold it for a certain period of time before starting to pull out the dummy bar. This has eliminated the occurrence of operational accidents such as breakouts and seal leaks.
３、ダミーパヘッドの繰り返し使用も可能どなり製造コ
ストも低減出来た。3. The dummy head can be used repeatedly, and manufacturing costs can be reduced.
第１図（イ）、（ロ）、（ハ）は注入開始前から定常鋳
造状態になるまでの作動順序を示す説明図。第２図はダ
ミーバの引き抜きど、内層用溶鋼の注入ノズルの下降開
始から定常状態になるまでの引き抜き速度及び下降速度
、並びにダミーバの上端と内層用溶鋼の注入ノズル先端
の位置を示す説明図、第３図はダミーバ引き抜きと、鋳
鍋及びタンデッシュ下降の連動のための制御例を示す説
明図、第４図は構造を示す説明図である。
１・・１鋳型、２・−・ダミーバ、３・・・複層鋳片、
４．４′・・−ロングノズル、５＠・・内層金属用鋳鍋
、６・Φ・長い注入ノズル、７・・・内層金属用タンデ
フシュ、８・・・外層金属用鋳鋼、９・・拳短い注入ノ
ズル、ｌＯ・・・外層金属用タンデッシュ、１１１１・
・−様磁場装置、１２・・・ピンチロール、 １７．１
７’・・争タンデッシュ昇陣装置、１８．１８′・・・
鋳鍋用昇降ジヤツキ、２０．２１．２４・・・検出器、
２２・・・演算装置、２５．２５’−−−鋳鍋昇降装置
、２６．２６′・・・タンデッシュ昇降装置、２８．２
８′・−・指示フレーム、２３・１１１１タンプツシユ
カー、般争・・鋳鍋台車。FIGS. 1(a), 1(b), and 1(c) are explanatory diagrams showing the sequence of operations from before the start of injection until a steady casting state is reached. FIG. 2 is an explanatory diagram showing the dummy bar withdrawal point, the withdrawal speed and descending speed of the inner layer molten steel injection nozzle from the start of descent until it reaches a steady state, and the position of the upper end of the dummy bar and the inner layer molten steel injection nozzle tip; FIG. 3 is an explanatory view showing an example of control for interlocking dummy bar withdrawal and lowering of the casting pot and tundish, and FIG. 4 is an explanatory view showing the structure. 1...1 mold, 2...dummy bar, 3...multilayer slab,
4.4'...-Long nozzle, 5@...Casting pot for inner layer metal, 6.Φ.Long injection nozzle, 7...Tandefush for inner layer metal, 8...Cast steel for outer layer metal, 9...Fist Short injection nozzle, lO...tundish for outer layer metal, 1111.
--like magnetic field device, 12... pinch roll, 17.1
7'...Tandesh ascending device, 18.18'...
Lifting jack for casting pot, 20.21.24...detector,
22... Arithmetic device, 25.25'--- Casting pot lifting device, 26.26'... Tundish lifting device, 28.2
8'--Instruction frame, 23.1111 tamps wheel, general issue... Casting pot truck.
Claims (1)
製造する連続鋳造において、先に短い注入ノズルで鋳型
内への溶鋼注入を行い、一定量注入後、内層部溶融金属
用鋳鍋と、長い注入ノズルを有するタンデッシュがダミ
ーバ引き抜きと連動して下降するようにし、長い注入ノ
ズルが鋳型の溶鋼内に浸漬後注入を開始する様にしたこ
とを特徴とする複層鋳片用連続鋳造方法。 ２、注入ノズルを有する表層部溶融金属用鋳鍋と、内層
部溶融金属用鋳鍋を搭載し、該２つの鍋の昇降を独立に
て可能とした鋳鍋台車と、長い注入ノズルを有するタン
デッシュと、短い注入ノズルを有するタンデッシュを搭
載し、該２つのタンデッシュの昇降を独立にて可能とし
たタンデッシュカーにより構成されることを特徴とする
複層鋳片用連続鋳造装置。[Claims] 1. In continuous casting in which multilayer slabs are manufactured using two injection nozzles of different lengths, molten steel is first injected into the mold using a short injection nozzle, and after a certain amount has been injected. , the inner layer molten metal casting pot and the tundish having a long injection nozzle are lowered in conjunction with the withdrawal of the dummy bar, and the long injection nozzle starts injection after being immersed in the molten steel of the mold. Continuous casting method for multilayer slabs. 2. A cast pot truck equipped with a surface layer molten metal casting pot having an injection nozzle and an inner layer molten metal casting pot and capable of raising and lowering the two pots independently, and a tundish having a long injection nozzle. and a tundish car equipped with a tundish having a short injection nozzle and capable of raising and lowering the two tundishes independently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18806990A JPH0475750A (en) | 1990-07-18 | 1990-07-18 | Method and apparatus for continuously casting duplex layer cast slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18806990A JPH0475750A (en) | 1990-07-18 | 1990-07-18 | Method and apparatus for continuously casting duplex layer cast slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0475750A true JPH0475750A (en) | 1992-03-10 |
Family
ID=16217166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18806990A Pending JPH0475750A (en) | 1990-07-18 | 1990-07-18 | Method and apparatus for continuously casting duplex layer cast slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0475750A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022085A1 (en) * | 1992-04-24 | 1993-11-11 | Nippon Steel Corporation | Method of obtaining double-layered cast piece |
| JPH06262305A (en) * | 1993-03-15 | 1994-09-20 | Nippon Steel Corp | Method for starting casting of complex layer cast slab |
| US5921232A (en) * | 1995-07-12 | 1999-07-13 | A & D Company Limited | Handy type inhaler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268537A (en) * | 1987-04-24 | 1988-11-07 | Nippon Steel Corp | Method for starting casting of complex material by continuous casting |
| JPH01271041A (en) * | 1988-04-22 | 1989-10-30 | Nippon Steel Corp | Dummy bar for continuously casting double-layer cast slab |
-
1990
- 1990-07-18 JP JP18806990A patent/JPH0475750A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268537A (en) * | 1987-04-24 | 1988-11-07 | Nippon Steel Corp | Method for starting casting of complex material by continuous casting |
| JPH01271041A (en) * | 1988-04-22 | 1989-10-30 | Nippon Steel Corp | Dummy bar for continuously casting double-layer cast slab |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022085A1 (en) * | 1992-04-24 | 1993-11-11 | Nippon Steel Corporation | Method of obtaining double-layered cast piece |
| JPH06262305A (en) * | 1993-03-15 | 1994-09-20 | Nippon Steel Corp | Method for starting casting of complex layer cast slab |
| US5921232A (en) * | 1995-07-12 | 1999-07-13 | A & D Company Limited | Handy type inhaler |
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