JPH05123836A - Method for improving cleanliness of cast slab in top and end parts in continuous casting strand - Google Patents

Method for improving cleanliness of cast slab in top and end parts in continuous casting strand

Info

Publication number
JPH05123836A
JPH05123836A JP29143791A JP29143791A JPH05123836A JP H05123836 A JPH05123836 A JP H05123836A JP 29143791 A JP29143791 A JP 29143791A JP 29143791 A JP29143791 A JP 29143791A JP H05123836 A JPH05123836 A JP H05123836A
Authority
JP
Japan
Prior art keywords
molten steel
mold
tundish
cooling metal
continuous 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.)
Pending
Application number
JP29143791A
Other languages
Japanese (ja)
Inventor
Kazuhisa Hamagami
和久 浜上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP29143791A priority Critical patent/JPH05123836A/en
Publication of JPH05123836A publication Critical patent/JPH05123836A/en
Pending legal-status Critical Current

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  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To prevent the entraping of flux and slag into molten steel part in a mold by dipping a cooling metal having through-holes in the vertical direction just below the molten steel surface in the mold at the time of completing continuous casting operation. CONSTITUTION:At the time of completing the pouring, the molten steel in a heat A forms the solidified phase 4. A tundish is taken off and the cooling metal 3 is dipped just below the molten metal surface L. As the cooling metal 3 has the through-holes to the vertical direction, this cooling metal can be clipped without pushing down the mold flux and the slag on the molten steel A surface into the molten steel. At this time, a solidified phase 5 is formed. New tundish is arranged and the molten steel in a heat B is poured. At this time, a solidified phase 6 is formed and at the initial stage of pouring the molten steel in the heat B, the molten steel entraping the mold flux and the slag does not invaded the molten steel in the heat A at the lower part of the cooling metal 3 and the cleanliness at the top part of the continuous cast strand is not deteriorated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、連鋳操業において、
その終了の際、又は、タンディッシュ交換を経て同一鋼
種の多連鋳を行う際、タンディッシュから溶鋼をモール
ド内へ注入しおえたときに、モールド内に存在する溶鋼
部分の清浄度の悪化を防止する、すなわち、連鋳ストラ
ンドトップエンドにおけるモールドフラックスの巻き込
みを防止する方法を提案するものである。
BACKGROUND OF THE INVENTION This invention relates to continuous casting operation.
At the end of the process, or when performing continuous casting of the same steel type after replacing the tundish, when the molten steel is poured into the mold from the tundish, the cleanliness of the molten steel part existing in the mold deteriorates. This method proposes a method of preventing, that is, preventing the entrainment of mold flux in the continuous cast strand top end.

【0002】これまで、たとえば、冷延鋼板向けなどの
連鋳スラブにおいて、連鋳ストランドトップエンド部ス
ラブは、熱延・冷延を施してコイル又はシートに製造し
た段階で、介在物に起因する超音波探傷試験による格落
ち率が高く、この改善が望まれていた。
Up to now, for example, in a continuous cast slab for cold-rolled steel sheets, the continuous cast strand top end slab is caused by inclusions at the stage of hot rolling / cold rolling to produce a coil or sheet. The rate of disqualification by the ultrasonic flaw detection test is high, and this improvement has been desired.

【0003】[0003]

【従来の技術】従来、連鋳操業において、タンディッシ
ュからモールド内に溶鋼を注入しおえたのちのモールド
内溶鋼の処理方法、すなわち、連鋳ストランドトップエ
ンドの処理方法としては、 溶鋼を鉄棒などで攪拌し、冷却する。 溶鋼をAl 棒で攪拌し、脱酸及び冷却する。 溶鋼上のスラグを除去し、水をかけて冷却する。 たとえば、特開昭58−218344号公報の連続鋳造にお
けるトップ処理方法に開示されているように、溶鋼湯面
下に鉄板を挿入し冷却する。 などが知られている。しかしながら、これらは連鋳鋼片
の引抜き時に発生するブリードの防止を主目的とするも
ので、連鋳ストランドトップ部鋼片の清浄度の悪化防止
には効果はなかった。すなわち、上記及びの方法で
は、攪拌や凝固収縮による、モールドフラックス、スラ
グの巻き込みや吸い込み、また、の方法では、水爆の
危険性があるばかりでなく、スラグ等を完全に除去でき
るものではないことから、凝固収縮によるモールドフラ
ックスやスラグの吸い込み、さらに、の方法では、鉄
板を溶鋼湯面下に挿入する際、溶鋼湯面上のモールドフ
ラックスやスラグを溶鋼中へ押し込む、など、共にモー
ルドフラックスやスラグが溶鋼中に巻き込まれ清浄度を
悪くするという問題があった。
2. Description of the Related Art Conventionally, in a continuous casting operation, a molten steel in a mold after the molten steel has been poured from a tundish into a mold, that is, a continuous cast strand top end is treated as a molten steel bar. Stir and cool. The molten steel is stirred with an Al rod, deoxidized and cooled. The slag on the molten steel is removed, and water is added to cool it. For example, as disclosed in JP-A-58-218344, a top treatment method in continuous casting, an iron plate is inserted below the surface of the molten steel and cooled. Are known. However, these are mainly intended to prevent bleeding that occurs when the continuous cast steel slab is drawn out, and they are not effective in preventing deterioration of the cleanliness of the continuous cast strand top slab. That is, in the above methods and, the mold flux, slag entrainment and suction by stirring and solidification shrinkage, and the method of not only there is a risk of water explosion, it is not possible to completely remove the slag and the like. From the above, suction of mold flux and slag by solidification shrinkage, and in the method of, when inserting the iron plate below the molten steel surface, push the mold flux and slag on the molten steel surface into the molten steel. There is a problem that the slag is caught in the molten steel and the cleanliness is deteriorated.

【0004】また、同一鋼種の多連鋳におけるタンディ
ッシュ交換時においては、たとえば、「鉄鋼便覧、2、
丸善株式会社、P644 (昭54−10−15)」には、タンデ
ィッシュ交換後の後続するチャージをそのままモールド
内に継ぎ足して鋳造する方法が開示されているが、後続
するチャージの注入初期において、後続するチャージの
溶鋼とともにモールドフラックスやスラグが、モールド
内にある先行チャージのトップ部溶鋼内に巻き込まれ、
この部分の清浄度を悪化させるという問題があった。
Further, when replacing the tundish in multiple casting of the same steel type, for example, "Handbook of Steel, 2, 2.
Maruzen Co., Ltd., P644 (Sho 54-10-15) "discloses a method of casting by adding the subsequent charge after the tundish exchange to the mold as it is, but at the initial stage of injection of the subsequent charge, Mold flux and slag together with the molten steel of the subsequent charge are caught in the molten steel of the preceding charge in the mold,
There is a problem that the cleanliness of this part is deteriorated.

【0005】[0005]

【発明が解決しようとする課題】この発明は、前記問題
点を有利に解決しようとするもので、タンディッシュか
ら溶鋼をモールド内へ注入しおえたときの、モールド内
連鋳ストランドトップエンドの溶鋼について、その冷却
処理に工夫をこらすことにより、モールドフラックスや
スラグの溶鋼中への巻き込みを防止する方法を提案する
ことを目的とする。
DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned problems in an advantageous manner. When the molten steel is poured from the tundish into the mold, the molten steel at the top end of the continuously cast strand in the mold is melted. With respect to the above, it is an object of the present invention to propose a method for preventing the entrainment of mold flux or slag into molten steel by devising the cooling treatment.

【0006】[0006]

【課題を解決するための手段】この発明の要旨は、 1.連鋳操業の終了に際して、タンディッシュから溶鋼
をモールド内へ注入しおえたのち、該タンディッシュを
取り外し、ついで、該モールド内の溶鋼湯面直下に、上
下方向の貫通孔を有する冷却金物を浸漬することを特徴
とする連鋳ストランドトップエンドにおける鋳片の清浄
度向上方法であり、
The gist of the present invention is as follows. At the end of the continuous casting operation, after the molten steel was poured into the mold from the tundish, the tundish was removed, and then a cooling metal article having vertical through holes was immersed directly below the molten steel surface in the mold. It is a method for improving the cleanliness of the slab in the continuous casting strand top end characterized by

【0007】2.連鋳操業中に、タンディッシュ交換を
経てから継続的な連鋳を行う同一鋼種の多連鋳におい
て、タンディッシュから溶鋼をモールド内へ注入しおえ
たのち、該タンディッシュを取り外し、ついで、該モー
ルド内の溶鋼湯面直下に、上下方向の貫通孔を有する冷
却金物を浸漬することを特徴とする連鋳ストランドトッ
プエンドにおける鋳片の清浄度向上方法である。
2. During continuous casting operation, in continuous casting of the same steel type that continuously performs continuous casting after tundish replacement, after pouring molten steel into the mold from the tundish, remove the tundish, then, A method for improving cleanliness of a slab in a continuous cast strand top end, characterized in that a cooling metal article having a through hole in a vertical direction is immersed immediately below the surface of the molten steel in the mold.

【0008】ここで、連鋳ストランドトップエンドと
は、同一鋼種の多連鋳におけるタンディッシュ交換時の
先行チャージのストランドトップエンドを含むものと
し、モールドフラックスの巻き込みとは、溶鋼中にモー
ルドフラックスやスラグが混入する現象を総称するもの
とする。
Here, the term "continuously cast strand top end" includes the strand top end of the preceding charge when the tundish is replaced in multiple castings of the same steel type, and the entrainment of mold flux means that the mold flux or slag is contained in molten steel. The phenomenon in which is mixed is a general term.

【0009】また、冷却金物としては、上下方向の貫通
孔を有していればよく、鋼板に板厚方向の貫通孔をあけ
たもの、棒鋼を格子状などに組合せたもの、溶接金鋼、
ワイヤラス、メタルラスなどを複数枚重ね合せ1体化し
たものなど、いずれでもよい。
As the cooling metal fitting, it is sufficient that it has through-holes in the vertical direction, such as a steel plate having through-holes in the plate thickness direction, a combination of steel bars in a grid pattern, welded gold steel,
Any of a plurality of wire laths, metal laths, etc., which are superposed on one another, may be used.

【0010】[0010]

【作用】この発明の最大の特徴は、連鋳ストランドトッ
プエンドにおいて、モールド内溶鋼湯面直下に上下方向
の貫通孔を有する冷却金物を浸漬することにある。この
上下方向の貫通孔を有する冷却金物を用いることの効果
を以下に述べる。
The greatest feature of the present invention resides in that, in the continuous cast strand top end, a cooling metal article having vertical through holes immediately below the surface of the molten steel in the mold is immersed. The effect of using the cooling metal article having the vertical through holes will be described below.

【0011】a.冷却金物を溶鋼湯面直下に浸漬する
際、溶鋼湯面上のモールドフラックスやスラグは冷却金
物の上下方向の貫通孔を通り抜けて湯面上に浮上する。
このため、板状冷却物を浸漬する場合のようにモールド
フラックスやスラグを溶鋼湯面下方に押し込むことはな
い。
A. When the cooling metal article is dipped right below the molten steel surface, the mold flux or slag on the molten steel surface passes through the through holes in the vertical direction of the cooling metal material and floats on the molten metal surface.
Therefore, the mold flux and the slag are not pushed below the surface of the molten steel as in the case of immersing the plate-shaped cooling material.

【0012】b.溶鋼を攪拌して冷却するようなことを
しないため、攪拌による溶鋼湯面上のモールドフラック
スやスラグを巻き込むことはない。
B. Since the molten steel is not stirred and cooled, the mold flux and slag on the molten steel surface due to stirring are not involved.

【0013】c.冷却金物の浸漬により、この周辺の溶
鋼は抜熱されて、早期に凝固するため、以後の凝固収縮
による金物より上部のモールドフラックスやスラグを吸
い込むことはない。
C. By the immersion of the cooling metal object, the molten steel around this is removed from the heat and solidifies early, so that the mold flux and slag above the metal object due to subsequent solidification shrinkage are not sucked.

【0014】d.冷却金物を浸漬し、この周辺が凝固状
態にあるときに、タンディッシュ交換後の溶鋼が注入さ
れても、モールドフラックスやスラグを巻き込んだ状態
の上記溶鋼は、冷却金物の浸漬部で阻止され、冷却金物
浸漬部より下方の溶鋼には影響をおよぼさない。したが
って、タンディッシュからモールド内に溶鋼を注入しお
えたときにモールド内にある連鋳ストランドトップ部の
清浄度の悪化は防止される。
D. Immersing the cooling metal, when the molten steel after tundish exchange is injected when the periphery is in a solidified state, the molten steel in the state where the mold flux and slag are involved is blocked at the immersion part of the cooling metal, It does not affect molten steel below the cooling metal immersion part. Therefore, when molten steel is poured into the mold from the tundish, deterioration of cleanliness of the continuously cast strand top portion in the mold is prevented.

【0015】つぎに、この発明の実施態様を図1により
説明する。図1は、この発明による冷却金物を用いた場
合で、タンディッシュ交換後、後続するチャージを注入
したときのモールド及びモールド内溶鋼の凝固状態を示
す縦断面図である。
Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a vertical cross-sectional view showing a solidified state of a mold and molten steel in the mold when a subsequent charge is injected after the tundish is exchanged when the cooling metal article according to the present invention is used.

【0016】交換前タンディッシュから、チャージA溶
鋼をモールド2に注入し、この注入終了時においては、
チャージA溶鋼は、凝固相4を形成した状態になる。つ
いで、タンディッシュを取り外してから、冷却金物3を
チャージA溶鋼湯面Lの直下に浸漬するが、この浸漬に
あたっては、冷却金物が上下方向の貫通孔を有している
ため、溶鋼湯面上のモールドフラックスやスラグを溶鋼
中に押し込むことなく浸漬できる。この冷却金物の浸漬
した時点では、凝固相5が形成される。
From the tundish before replacement, charge A molten steel is poured into the mold 2, and at the end of this injection,
The molten steel of Charge A is in a state where the solidified phase 4 is formed. Then, after removing the tundish, the cooling metal object 3 is immersed directly below the molten steel surface L of the charge A. When this immersion is performed, the cooling metal object has a through hole in the vertical direction. Can be immersed without pressing mold flux or slag into molten steel. A solidified phase 5 is formed at the time when the cooling metal article is dipped.

【0017】なお、この冷却金物3の浸漬位置は、湯面
L上のスラグ層より下面に位置させればよい。
The immersion position of the cooling metal fitting 3 may be located below the slag layer on the molten metal surface L.

【0018】このように、上下方向に貫通孔を有する冷
却金物3を用いることにより溶鋼中にモールドフラック
スやスラグを押し込むことなく、また、冷却金物3を浸
漬することにより、この部分の溶鋼は抜熱により早期に
凝固相5を形成するため、以後の凝固収縮による金物3
より上部のモールドフラックスやスラグの吸い込みを防
止できる。
As described above, by using the cooling metal article 3 having the through holes in the vertical direction without pushing the mold flux or slag into the molten steel, and by dipping the cooling metal article 3, the molten steel in this portion is removed. Since the solidification phase 5 is formed early by heat, the metal 3 caused by the subsequent solidification contraction
It is possible to prevent suction of mold flux and slag at the upper part.

【0019】つぎに、冷却金物3をチャージA溶鋼湯面
Lの直下に浸漬後、交換する新規タンディッシュを正規
位置に設置し、このタンディッシュからノズル1を介し
てモールド2に後続するチャージB溶鋼を注入する。こ
の時点では、溶鋼の凝固はさらに進行し、凝固相6を形
成する。
Next, after immersing the cooling metal 3 directly below the molten steel surface L of the charge A, a new tundish to be replaced is installed at a regular position, and the charge B following the mold 2 from this tundish via the nozzle 1 is installed. Inject molten steel. At this point, the solidification of the molten steel further progresses and a solidification phase 6 is formed.

【0020】したがって、交換後のタンディッシュから
のチャージB溶鋼の注入初期において、モールドフラッ
クスやスラグを巻き込んでいる溶鋼が冷却金物3より下
方のチャージA溶鋼に浸入することはなく、この部分、
すなわち、連鋳ストランドトップ部の清浄度を悪化させ
ることはない。
Therefore, at the initial stage of injecting the charge B molten steel from the tundish after the exchange, the molten steel enclosing the mold flux and the slag does not penetrate into the charge A molten steel below the cooling metal fitting 3, and this portion,
That is, the cleanliness of the continuous cast strand top portion is not deteriorated.

【0021】なお、上記冷却金物の寸法は、モールド内
寸法より30〜50mmの範囲で小さくすることがよい。
The size of the cooling metal article is preferably smaller than the internal size of the mold within the range of 30 to 50 mm.

【0022】[0022]

【実施例】2ストランドを有する連鋳機を用い、モール
ド寸法:1020mm(幅)× 260mm(厚さ)で、C:0.05wt
%、Si : 0.01wt%、Mn : 0.20wt%、Al : 0.030wt
%の成分組成を有する連鋳スラブを鋳造した。
[Example] Using a continuous casting machine having two strands, mold dimensions: 1020 mm (width) x 260 mm (thickness), C: 0.05 wt
%, Si: 0.01 wt%, Mn: 0.20 wt%, Al: 0.030 wt
A continuous cast slab having a component composition of 10% was cast.

【0023】この連鋳スラブの鋳造にあたっては、 タンディッシュから溶鋼をモールド内へ注入終了
後、この発明方法に従って、タンディッシュを移動して
から、モールド内溶鋼湯面直下100mm の位置に冷却金物
を上記溶鋼注入終了後1分後に浸漬した場合、及び、比
較例として冷却金物を使用しなかった場合、
In casting the continuous cast slab, after the molten steel is poured into the mold from the tundish, the tundish is moved according to the method of the present invention, and then the cooling metal is placed at a position 100 mm directly below the molten steel surface in the mold. When immersed 1 minute after the completion of the molten steel injection and when no cooling metal was used as a comparative example,

【0024】 タンディッシュ交換を経てから継続的
に連鋳を行う同一鋼種の多連鋳において、この発明方法
に従って、交換前のタンディッシュから溶鋼をモールド
内へ注入終了後、上記と同様に冷却金物をモールド内溶
鋼湯面直下に浸漬し、4分後に交換後のタンディッシュ
から溶鋼を注入した場合、及び、比較例として冷却金物
を使用しなかった場合、の4条件で行なった。
In continuous casting of the same steel type, in which continuous casting is continuously performed after tundish exchange, in accordance with the method of the present invention, after completion of pouring molten steel into the mold from the tundish before exchange, the cooling metal article is the same as above. Was immersed just below the surface of the molten steel in the mold, and after 4 minutes, the molten steel was injected from the tundish after replacement, and as a comparative example, no cooling metal was used.

【0025】ここで、用いた冷却金物は、メタルラス6
枚を重ね合せ1体化したもので、その寸法は、図2に示
すように 920×200mm である。
The cooling metal used here is the metal lath 6
The sheets are stacked and integrated into a single unit, and the dimensions are 920 x 200 mm, as shown in Fig. 2.

【0026】上記条件で鋳造した各連鋳ストランドトッ
プ部スラブを通常の熱延・冷延工程で、板厚1.5mm の冷
延板コイルに仕上げ、超音波探傷試験を行ない、格落ち
率指数を比較した。これらの結果を図3にまとめて示
す。
Each continuous cast strand top slab cast under the above conditions is finished into a cold rolled sheet coil with a sheet thickness of 1.5 mm by an ordinary hot rolling / cold rolling step, and subjected to an ultrasonic flaw detection test to obtain a rating rate index. Compared. These results are summarized in FIG.

【0027】ここに格落ち率指数は、超音波探傷試験に
より介在物が検出されたため深絞り用鋼板をフラットユ
ース用鋼板に変更した割合を指数表示した。
Here, the rating rate indicates the rate at which the deep-drawing steel sheet was changed to a flat-use steel sheet because inclusions were detected by the ultrasonic flaw detection test.

【0028】図3から明らかなように、タンディッシュ
からモールド内への溶鋼注入終了時、及びタンディッシ
ュ交換時ともにこの発明方法の適合例は、比較例にくら
べ大幅に格落ち率指数が低減していることがわかる。
As is apparent from FIG. 3, in the case where the molten steel is completely poured from the tundish into the mold and when the tundish is replaced, the conforming example of the method of the present invention has a significantly lower rating rate index than the comparative example. You can see that

【0029】[0029]

【発明の効果】この発明は、タンディッシュ、又は交換
前タンディッシュから溶鋼をモールド内へ注入しおえた
のち、モールド内溶鋼湯面直下に上下方向の貫通孔を有
する冷却金物を浸漬することにより、上記モールド内溶
鋼部分へのモールドフラックスやスラグの巻き込みを防
止し、清浄度を向上するもので、この発明による上記モ
ールド内溶鋼部分、すなわち、連鋳ストランドトップ部
から製造される製品の品質劣化はなく、歩止りは大幅に
向上する。
Industrial Applicability According to the present invention, molten steel is poured into a mold from a tundish or a tundish before replacement, and then a cooling metal article having through-holes in the vertical direction is immersed immediately below the surface of the molten steel in the mold. , To prevent entrainment of mold flux and slag into the molten steel portion in the mold and improve cleanliness, and the molten steel portion in the mold according to the present invention, that is, deterioration of the quality of the product produced from the continuous cast strand top portion Not, the stakes are greatly improved.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明による冷却金物を溶鋼中に浸漬した状
態で、タンディッシュ交換後、後続するチャージをモー
ルド内に注入したときのモールド及びモールド内溶鋼の
凝固状態を示す縦断面図である。
FIG. 1 is a longitudinal sectional view showing a solidified state of a mold and molten steel in a mold when a subsequent charge is injected into the mold after a tundish is exchanged in a state where a cooling metal article according to the present invention is immersed in the molten steel.

【図2】実施例で使用した冷却金物の斜視図である。FIG. 2 is a perspective view of a cooling metal piece used in an example.

【図3】この発明の適合例、及び、比較例の格落ち率指
数を示すグラフである。
FIG. 3 is a graph showing a disqualification rate index of a conforming example of the present invention and a comparative example.

【符号の説明】[Explanation of symbols]

1 浸漬ノズル 2 モールド 3 冷却金物 4 凝固相 5 凝固相 6 凝固相 A タンディッシュ交換前のチャージの溶鋼 B タンディッシュ交換後のチャージの溶鋼 L タンディッシュ交換前のチャージの溶鋼湯面 1 Immersion nozzle 2 Mold 3 Cooling metal 4 Solidification phase 5 Solidification phase 6 Solidification phase A Molten steel of charge before tundish exchange B Molten steel of charge after tundish exchange L Melt steel surface of charge before tundish exchange

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 連鋳操業の終了に際して、タンディッシ
ュから溶鋼をモールド内へ注入しおえたのち、該タンデ
ィッシュを取り外し、ついで、該モールド内の溶鋼湯面
直下に、上下方向の貫通孔を有する冷却金物を浸漬する
ことを特徴とする連鋳ストランドトップエンドにおける
鋳片の清浄度向上方法。
1. At the end of the continuous casting operation, after the molten steel is poured into the mold from the tundish, the tundish is removed, and then a vertical through hole is formed directly below the molten steel surface in the mold. A method for improving cleanliness of a cast slab in a continuous cast strand top end, which comprises immersing a cooling metal having the same.
【請求項2】 連鋳操業中に、タンディッシュ交換を経
てから継続的な連鋳を行う同一鋼種の多連鋳において、
タンディッシュから溶鋼をモールド内へ注入しおえたの
ち、該タンディッシュを取り外し、ついで、該モールド
内の溶鋼湯面直下に、上下方向の貫通孔を有する冷却金
物を浸漬することを特徴とする連鋳ストランドトップエ
ンドにおける鋳片の清浄度向上方法。
2. In continuous casting of the same steel type, which continuously performs continuous casting after tundish exchange during continuous casting operation,
After the molten steel is poured into the mold from the tundish, the tundish is removed, and then a cooling metal article having a through hole in the up-down direction is immersed immediately below the molten steel surface in the mold. A method for improving the cleanliness of cast slabs at the top end of cast strands.
JP29143791A 1991-11-07 1991-11-07 Method for improving cleanliness of cast slab in top and end parts in continuous casting strand Pending JPH05123836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29143791A JPH05123836A (en) 1991-11-07 1991-11-07 Method for improving cleanliness of cast slab in top and end parts in continuous casting strand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29143791A JPH05123836A (en) 1991-11-07 1991-11-07 Method for improving cleanliness of cast slab in top and end parts in continuous casting strand

Publications (1)

Publication Number Publication Date
JPH05123836A true JPH05123836A (en) 1993-05-21

Family

ID=17768861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29143791A Pending JPH05123836A (en) 1991-11-07 1991-11-07 Method for improving cleanliness of cast slab in top and end parts in continuous casting strand

Country Status (1)

Country Link
JP (1) JPH05123836A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7682472B2 (en) * 2005-08-18 2010-03-23 Sumco Solar Corporation Method for casting polycrystalline silicon
CN115070001A (en) * 2022-05-20 2022-09-20 江阴兴澄特种钢铁有限公司 Device and method for quickly covering tail billet of oversized continuous casting round billet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647250A (en) * 1979-09-25 1981-04-28 Nippon Steel Corp Continuous casting method
JPS5942587A (en) * 1982-09-01 1984-03-09 株式会社日立製作所 Braun tube display
JPS6116914U (en) * 1984-07-05 1986-01-31 株式会社クボタ Wheel support structure of walking rice transplanter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647250A (en) * 1979-09-25 1981-04-28 Nippon Steel Corp Continuous casting method
JPS5942587A (en) * 1982-09-01 1984-03-09 株式会社日立製作所 Braun tube display
JPS6116914U (en) * 1984-07-05 1986-01-31 株式会社クボタ Wheel support structure of walking rice transplanter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7682472B2 (en) * 2005-08-18 2010-03-23 Sumco Solar Corporation Method for casting polycrystalline silicon
CN115070001A (en) * 2022-05-20 2022-09-20 江阴兴澄特种钢铁有限公司 Device and method for quickly covering tail billet of oversized continuous casting round billet
CN115070001B (en) * 2022-05-20 2024-01-26 江阴兴澄特种钢铁有限公司 Tail blank rapid cover device and method for oversized continuous casting round blank

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