JP2001087842A - Method and device for twin drum type continuous casting - Google Patents
Method and device for twin drum type continuous castingInfo
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- JP2001087842A JP2001087842A JP2000142458A JP2000142458A JP2001087842A JP 2001087842 A JP2001087842 A JP 2001087842A JP 2000142458 A JP2000142458 A JP 2000142458A JP 2000142458 A JP2000142458 A JP 2000142458A JP 2001087842 A JP2001087842 A JP 2001087842A
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- pair
- drum
- drums
- continuous casting
- twin
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、双ドラム式連続鋳
造装置による薄帯鋳片の鋳造において、ドラム端面と摺
動接触するサイド堰耐火物の損傷及び磨耗により制約を
受ける鋳造量の限界を拡大し、長時間鋳造を可能にする
方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting limit for a thin strip cast by a twin-drum type continuous casting apparatus, which is limited by damage and wear of refractories of side dams which are in sliding contact with a drum end face. The present invention relates to a method and an apparatus for enlarging and enabling casting for a long time.
【０００２】双ドラム式連続鋳造装置による薄帯鋳片の
鋳造においては、一対のドラムの両端面に一対のサイド
堰を押し付けてプールを形成し、このプールに溶鋼を連
続的に供給しながら一対のドラムを回転させ、ドラム周
面に沿って生成した一対の凝固シェルをドラム最小ギャ
ップ部（ドラムキス点）で圧着して鋳片とする。[0002] In the casting of thin strip slabs by a twin-drum continuous casting apparatus, a pool is formed by pressing a pair of side dams against both end surfaces of a pair of drums, and a pair of molten steel is continuously supplied to the pool while molten steel is supplied. Is rotated, and a pair of solidified shells formed along the peripheral surface of the drum are pressed at a minimum gap portion (drum kiss point) of the drum to form a cast slab.
【０００３】[0003]
【発明が解決しようとする課題】双ドラム式連続鋳造に
おいては、消耗品コストの削減及び長時間鋳造を行うこ
とで生産能率の向上を図ることが重要であるが、従来に
おいては、サイド堰耐火物の損耗が大きいため、サイド
堰耐火物の寿命が鋳造可能時間及び消耗品コストを左右
する大きな要因であった。In twin-drum continuous casting, it is important to improve the production efficiency by reducing the cost of consumables and performing long-time casting. Due to the large wear of the material, the life of the side dam refractory was a major factor influencing the casting time and the cost of consumables.
【０００４】サイド堰耐火物の寿命を律する損耗形態を
以下に挙げる。 (1) サイド耐火物の最下端が、ドラムや凝固シェルから
受ける下向きの力によって欠損する。 (2) サイド耐火物のドラム周面近傍に生成・付着した地
金が剥離・脱落し、その地金がドラム間隙を通過すると
き、直接、サイド耐火物を引っ張って破壊する。 (3) 上記地金がドラム間隙を通過するとき、一時的にド
ラムギャップが拡げられて、ドラム端面がサイド堰耐火
物の未磨耗部に乗り上げ、そこに発生した間隙に溶鋼が
侵入して地金となり、サイド堰耐火物を損傷する。 (4) 上記拡げられたドラムが元に戻るとき、オーバーハ
ングしてサイド堰耐火物に衝突し、耐火物を破壊する。 (5) ドラム周面の端部に生成した凝固シェルや該シェル
の表面近傍に付随した半凝固状態の溶鋼がドラムととも
に移動する際に、サイド堰耐火物を、浸食や溶損により
損傷する。The following is a description of the types of wear that determine the life of refractories for side dams. (1) The lowermost end of the side refractory is broken by the downward force received from the drum or the solidified shell. (2) The refractory metal generated and adhered near the drum peripheral surface peels off and falls off, and when the metal passes through the gap between the drums, the refractory is directly pulled and destroyed. (3) When the above-mentioned metal passes through the gap between the drums, the gap between the drums is temporarily widened, and the end surface of the drum rides on the unworn portion of the refractory of the side dam, and molten steel enters the gap generated there and the ground. It becomes gold and damages refractories on side dams. (4) When the expanded drum returns, it overhangs and collides with the side dam refractory, destroying the refractory. (5) When the solidified shell formed at the end of the peripheral surface of the drum and the molten steel in a semi-solid state attached to the vicinity of the surface of the shell move together with the drum, the side dam refractory is damaged by erosion or erosion.
【０００５】サイド堰耐火物の損傷が進行すると、そこ
に溶鋼が侵入して地金となり、地金がサイド堰耐火物を
損傷し、その結果、シール不良となり溶鋼が洩れ出すこ
とになる。溶鋼が一旦洩れ出すとシールは急激に悪くな
って、鋳造継続が不可能となる場合がある。また、図１
１に示すように、サイド堰耐火物４の損傷が進行する
と、それが、ドラム端面１ａと接触している部分に及ん
で、損傷部分ｄに溶鋼が入り込み、凝固シェルｇがドラ
ム端面側に回り込む現象が発生する。ドラム端面側に回
り込んだ凝固シェルｇは、ドラムキス点から鋳片ととも
に排出されるとき、ドラム端面に引っ掛かり、その結
果、鋳片がドラムに巻き付く現象が生じて鋳造継続の障
害となったり、鋳片エッジ部が引き裂かれる現象が生じ
る。[0005] When the damage of the refractory of the side dam progresses, molten steel invades there and becomes metal, and the metal damages the refractory of the side dam, resulting in poor sealing and leakage of the molten steel. Once the molten steel leaks out, the seal deteriorates abruptly, making it impossible to continue casting. FIG.
As shown in FIG. 1, as damage to the side dam refractory 4 progresses, the damage reaches the portion in contact with the drum end surface 1a, molten steel enters the damaged portion d, and the solidified shell g wraps around the drum end surface. The phenomenon occurs. When the solidified shell g wrapped around the drum end face side is discharged together with the slab from the drum kiss point, the solidified shell g is caught on the drum end face, and as a result, a phenomenon occurs in which the slab wraps around the drum, which hinders the continuation of casting, A phenomenon occurs in which the slab edge is torn.
【０００６】従来、サイド堰耐火物の寿命延長を図るた
めに、耐火物材質の改善がなされてきたが、こういった
損傷を完全に防止するには至っていない。一方、サイド
堰の使用方法を改善することによってサイド堰耐火物の
寿命延長を図る方法として、サイド堰の下端をドラムキ
ス点よりも下方まで延長させて設け、このサイド堰をそ
の磨耗速度に応じてゆっくりとした速度で上昇させるこ
とにより、サイド堰耐火物の損傷部を上方へシフトさせ
て常に新しい耐火物表面を露出させる方法が、例えば、
実開平４−４３４４７号公報により知られている。Conventionally, refractory materials have been improved in order to extend the life of refractories of side dams, but such damages have not been completely prevented. On the other hand, as a method of extending the life of the refractory of the side weir by improving the usage of the side weir, the lower end of the side weir is provided to extend below the drum kiss point, and the side weir is provided according to its wear rate. A method of shifting the damaged portion of the side dam refractory upward by constantly raising it at a slow speed to always expose a new refractory surface, for example,
This is known from Japanese Utility Model Laid-Open No. 4-43447.
【０００７】しかしながら、サイド堰の下端をドラムキ
ス点よりも下方まで延長させて設けた場合は、延長部分
にもドラム端面と対応する円弧状の磨耗痕が付き、この
磨耗痕にドラム端面が嵌まり込む。この状態でサイド堰
を上昇させると、ドラムキス点よりも下方部において、
磨耗痕がドラム周縁部を押し上げることになるため、サ
イド堰は耐火物が容易に磨耗しなければ上昇することが
できない。しかも、サイド堰耐火物は、通常、耐磨耗性
のものが用いられるため、上昇は極めて困難である。However, when the lower end of the side weir is provided so as to extend below the drum kiss point, an arc-shaped wear mark corresponding to the drum end face is also formed on the extended portion, and the drum end face is fitted to the wear mark. Put in. When the side weir is raised in this state, at a portion below the drum kiss point,
Since the wear mark pushes up the drum peripheral portion, the side weir cannot rise unless the refractory is easily worn. In addition, since the side weir refractory is usually abrasion-resistant, it is extremely difficult to ascend.
【０００８】サイド堰の上方シフトを容易にするために
は、サイド堰の下端をドラムキス点か、または、ドラム
キス点より上方に位置させることが必要であるが、この
場合、サイド堰を僅かに上昇させた時点で、サイド堰下
端がシェル未圧着位置まで到達して溶鋼洩れが発生する
ことになり、サイド堰の上昇可能なストロークは僅かな
ものとなる。本発明は、サイド堰耐火物の損傷を防止す
るとともに、サイド堰の上方シフトに伴う溶鋼洩れ等の
問題を解消してサイド堰の上昇可能なストロークを拡大
させることにより、サイド堰の寿命延長を図ることを課
題とする。In order to facilitate the upward shifting of the side weir, the lower end of the side weir must be located at the drum kiss point or above the drum kiss point. In this case, the side weir is slightly raised. At this point, the lower end of the side weir reaches the position where the shell is not crimped, causing leakage of molten steel, and the stroke of the side weir that can be raised is small. The present invention extends the life of the side weir by preventing damage to the refractory of the side weir, eliminating problems such as molten steel leakage due to the upward shift of the side weir, and increasing the liftable stroke of the side weir. The task is to achieve this.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決する本発
明は、一対のドラムの両端面に一対のサイド堰を押し付
けた双ドラム式連続鋳造装置において、該一対のサイド
堰のそれぞれの下端面を面取方向の傾斜面で形成したこ
とを特徴とする。この本発明によれば、上記傾斜面の上
縁を、ドラムキス点に位置させた状態で鋳造を開始する
とともに、サイド堰を、磨耗速度に応じた速度で上昇シ
フトさせると、上記傾斜面の上縁が磨耗に伴って下方へ
シフトするため、サイド堰を上昇シフトさせてもサイド
堰の下端をドラムキス点に維持することができる。ま
た、サイド堰の下端面を傾斜面としたことで、ドラム及
び凝固シェルによる下向きの力によるサイド堰耐火物の
欠損を防止できる。According to the present invention, there is provided a twin-drum continuous casting apparatus in which a pair of side weirs are pressed against both end surfaces of a pair of drums. Is formed with an inclined surface in a chamfering direction. According to the present invention, casting is started in a state where the upper edge of the inclined surface is located at the drum kiss point, and the side weir is shifted upward at a speed corresponding to the wear rate, whereby the upper surface of the inclined surface is shifted. Since the edge shifts downward with wear, the lower end of the side weir can be maintained at the drum kiss point even when the side weir is shifted upward. In addition, since the lower end surface of the side weir is an inclined surface, it is possible to prevent the refractory of the side weir from being damaged due to a downward force caused by the drum and the solidified shell.
【００１０】また、本発明は、一対のドラムの両端面に
一対のサイド堰を押し付けた双ドラム式連続鋳造装置に
おいて、該一対のドラムのそれぞれの端面外周部にリン
グ状で突出したシール部を設け、該一対のサイド堰のそ
れぞれの該シール部との接触面に沿って突出部を設け、
該突出部の外側面を面取方向の傾斜面で形成したことを
特徴とする。この本発明によれば、サイド堰を磨耗に応
じた速度で上昇シフトさせると、傾斜面の側縁をシール
部の周縁に維持することができるので、サイド堰を上昇
シフトさせても初期のシール面幅を維持することができ
る。また、サイド堰耐火物のドラムシール部との接触面
に突出部を設けたので、突出部には磨耗溝（未磨耗部）
は形成されない。そのため、前記した地金噛込みにより
ドラムギャップが開いてドラム端面がサイド堰耐火物の
未磨耗部に乗り上げることによるシール不良を防止でき
る。Further, according to the present invention, in a twin-drum continuous casting apparatus in which a pair of side weirs are pressed against both end surfaces of a pair of drums, a ring-shaped projecting seal portion is provided on the outer peripheral portion of each end surface of the pair of drums. Providing, a protrusion along the contact surface of each of the pair of side dams with the seal portion,
The outer surface of the projection is formed as an inclined surface in a chamfering direction. According to this invention, when the side weir is shifted upward at a speed corresponding to the wear, the side edge of the inclined surface can be maintained at the peripheral edge of the seal portion. The surface width can be maintained. In addition, a protrusion is provided on the contact surface of the side dam refractory with the drum seal, so that the protrusion has worn grooves (unworn parts).
Is not formed. For this reason, it is possible to prevent the seal failure due to the drum gap opening due to the above-described metal biting and the drum end surface riding on the unworn portion of the side dam refractory.
【００１１】また、本発明は、一対のドラムの両端面に
一対のサイド堰を押し付けた双ドラム式連続鋳造装置に
おいて、該一対のドラムのそれぞれの周面両端部に、該
周面両端部における一対の凝固シェルを圧着する段付き
部を設け、該一対のサイド堰のそれぞれに、該サイド堰
をドラム端面に沿って上昇させる昇降駆動手段を設けた
ことを特徴とする。Further, the present invention is directed to a twin-drum continuous casting apparatus in which a pair of side dams are pressed against both end surfaces of a pair of drums. A stepped portion for pressing a pair of solidified shells is provided, and each of the pair of side weirs is provided with a lifting drive means for raising the side weir along the drum end surface.
【００１２】また、本発明は、一対のドラムの両端面に
一対のサイド堰を押し付けた双ドラム式連続鋳造装置に
より薄帯鋳片を鋳造する方法において、該一対のドラム
のそれぞれの周面両端部に、該周面両端部における一対
の凝固シェルを圧着する段付き部を設け、該一対のサイ
ド堰のそれぞれの下端をドラムキス点から上方２０ｍｍ
の範囲内に位置させた状態で鋳造を開始し、鋳造中、前
記一対のサイド堰のそれぞれを、その磨耗速度に応じて
上昇させることを特徴とする。The present invention also relates to a method of casting a thin strip by a twin-drum continuous casting apparatus in which a pair of side dams are pressed against both end surfaces of a pair of drums. A stepped portion for pressing a pair of solidified shells at both ends of the peripheral surface is provided, and each lower end of the pair of side weirs is 20 mm above the drum kiss point.
The casting is started in a state of being positioned within the range of, and during the casting, each of the pair of side weirs is raised according to its wear rate.
【００１３】この本発明のように、一対のドラムの周面
両端部に段付き部を設けると、該段付き部によって、ド
ラム両端部におけるシェル圧着点を上昇シフトさせるこ
とができるので、該圧着点の上昇シフト分だけサイド堰
を余分に上昇シフトさせることができる。If stepped portions are provided at both ends of the peripheral surfaces of the pair of drums as in the present invention, the step can increase the shift of the shell pressure point at both ends of the drum. The side weirs can be additionally shifted upward by the amount of the upward shift of the point.
【００１４】[0014]
【発明の実施の形態】図１は、本発明による双ドラム式
連続鋳造装置のサイド堰部分の側面図、図２は、図１の
Ｉ−Ｉ矢視の正面図である。図１及び図２に示す一対の
ドラム１、１は、内部が水等の冷却媒体により冷却さ
れ、互いに反対方向へ回転する。一対のドラム１、１の
周面両端部には、該周面両端部における凝固シェルを圧
着することでシェル圧着開始点を上昇へシフトすること
を可能とする段付き部１ｂが設けられている。段付き部
１ｂの望ましい寸法は鋳造板厚によって異なるが、鋳造
板厚が１．０〜６．０ｍｍの場合は、幅３〜１５ｍｍ、
高さ０．１〜０．５ｍｍ程度である。ドラム両端面外周
部には、サイド堰２とのシール面圧（押付け面圧）を確
保する目的で、幅が５〜２０ｍｍ程度のリング状で突出
したシール部１ｃ（図４、図５、参照）が設けられてい
る。FIG. 1 is a side view of a side dam portion of a twin-drum continuous casting apparatus according to the present invention, and FIG. 2 is a front view taken along the line II of FIG. The inside of the pair of drums 1 and 1 shown in FIGS. 1 and 2 is cooled by a cooling medium such as water, and rotates in opposite directions. At both ends of the peripheral surfaces of the pair of drums 1 and 1, there are provided stepped portions 1b which can shift the shell crimping start point upward by pressing the solidified shells at both ends of the peripheral surfaces. . Desirable dimensions of the stepped portion 1b are different depending on the thickness of the casting, but when the thickness of the casting is 1.0 to 6.0 mm, the width is 3 to 15 mm,
The height is about 0.1 to 0.5 mm. In order to secure a sealing surface pressure (pressing surface pressure) with the side weir 2, a ring-shaped sealing portion 1 c having a width of about 5 to 20 mm is provided on the outer peripheral portion of both ends of the drum (see FIGS. 4 and 5). ) Is provided.
【００１５】図２に示す一対のサイド堰２（一方のみ図
示）は、耐火物ケース３内に不定型耐火物５が充填さ
れ、不定型耐火物５に耐火物れんが６が固定され、耐火
物れんが６のシール部１ｃと対面する部分に溝（図示せ
ず）が設けられ、溝にＢＮ等の複数のセラミック板７が
固定され、複数のセラミック板７によって略Ｖ字状の突
起部８が形成されて構成されている。セラミック板７の
上記突出部８は、セラミック板７の強度を確保するこ
と、及び、該突出部８の表面とシール部１ｃの表面との
位置合わせを容易にすることのために、セラミック板７
の幅中央部のみが突出している。A pair of side weirs 2 (only one is shown) shown in FIG. 2 has a refractory case 3 filled with an irregular refractory 5, a refractory brick 6 fixed to the irregular refractory 5, and a refractory A groove (not shown) is provided in a portion of the brick 6 facing the seal portion 1c, a plurality of ceramic plates 7 such as BN are fixed in the groove, and a substantially V-shaped projection 8 is formed by the plurality of ceramic plates 7. It is formed and configured. The protruding portion 8 of the ceramic plate 7 is used to secure the strength of the ceramic plate 7 and to facilitate alignment between the surface of the protruding portion 8 and the surface of the seal portion 1c.
Only the central part of the width protrudes.
【００１６】図１に示す耐火物ケース３の背面側には、
サイド堰２の熱変形を防止する補剛体９が固定されてい
る。この補剛体９の中央部は、昇降式支持フレーム１０
に固定支持された支持軸１１によって支持されており、
補剛体９の上部２点及び下部１点は、昇降式支持フレー
ム１０に固定支持された油圧又は電動駆動の押圧装置１
２によって支持されている。On the back side of the refractory case 3 shown in FIG.
A stiffener 9 for preventing thermal deformation of the side weir 2 is fixed. The central part of the stiffener 9 is
Is supported by a support shaft 11 fixedly supported by
The upper two points and the lower one point of the stiffening body 9 are hydraulically or electrically driven pressing devices 1 fixedly supported by an elevating support frame 10.
2 supported.
【００１７】昇降式支持フレーム１０は、下部を垂直ガ
イド１３に案内されて垂直ガイド１３の底面に固定され
た油圧又は電動駆動の昇降駆動手段１４に連結されてい
る。このように、サイド堰２は、押圧装置１２によって
一対のドラム１の端面に押圧され、昇降駆動手段１４に
よってドラム端面に沿って昇降移動が可能なように構成
されている。The lifting / lowering support frame 10 is connected to a hydraulically or electrically driven lifting / lowering drive means 14 which is guided at its lower part by a vertical guide 13 and is fixed to the bottom surface of the vertical guide 13. In this way, the side weir 2 is configured to be pressed against the end faces of the pair of drums 1 by the pressing device 12 and to be able to move up and down along the drum end faces by the lifting drive means 14.
【００１８】図３は、図１に示すサイド堰２の下部側断
面を拡大して示している。図に示すように、サイド堰２
における略Ｖ字状の突起部８の下端面は、面取方向の傾
斜面８ａによって形成されている。鋳造開始前に傾斜面
８ａの上端８ｂをドラムキス点ｋｐに位置させて鋳造を
開始し、突起部８の磨耗速度に応じた速度でサイド堰２
を上昇させると、鋳造中を通して傾斜面８ａの上端８ｂ
を、ドラムキスｋｐに位置させることができる。また、
突起部８の下端面を傾斜面としたことで、ドラム及び凝
固シェルによる下向きの力によるサイド堰耐火物の欠損
を防止できる。FIG. 3 is an enlarged view of the lower section of the side weir 2 shown in FIG. As shown in FIG.
The lower end surface of the substantially V-shaped projection 8 is formed by an inclined surface 8a in the chamfering direction. Before starting the casting, the upper end 8b of the inclined surface 8a is positioned at the drum kiss point kp to start casting, and the side dam 2 is driven at a speed corresponding to the abrasion speed of the projection 8.
Is raised, the upper end 8b of the inclined surface 8a throughout the casting.
Can be located at the drum kiss kp. Also,
By making the lower end surface of the projection 8 an inclined surface, it is possible to prevent the side dam refractory from being lost due to the downward force of the drum and the solidified shell.
【００１９】図４及び図５は、それぞれ図２のII−II矢
視及びIII −III 矢視の平断面を示している。図に示す
ように、サイド堰２における略Ｖ字状の突起部８の外側
面は、傾斜面８ｄによって形成されている。鋳造開始前
に、図２及び図３に示す傾斜面８ｄの上端８ｂをドラム
キス点ｋｐに合致させると、傾斜面８ｄの側縁８ｅとシ
ール部の周縁１ｄとが合致し、突起部８の摺動面幅とシ
ール部１ｃの摺動面幅とが合致するように形成されてい
る。そのため、突起部８の磨耗速度に応じた速度でサイ
ド堰２を上昇させると、鋳造中を通して、傾斜面８ｄの
側縁８ｅとシール部の周縁１ｄとは、その位置関係を維
持し、その結果、初期のシール面幅を維持してシール不
良を防止することができる。また、突起部８とシール部
１ｃの摺動面幅が合致しているから、突出部８には磨耗
溝（未磨耗部）は形成されない。そのため、地金噛込み
によりドラムギャップが開いてシール部１ｃが突起部８
の未磨耗部に乗り上げ、シール不良を招くという問題は
発生しない。FIG. 4 and FIG. 5 show plan sections taken along the arrows II-II and III-III of FIG. 2, respectively. As shown in the figure, the outer surface of the substantially V-shaped projection 8 in the side weir 2 is formed by an inclined surface 8d. When the upper end 8b of the inclined surface 8d shown in FIG. 2 and FIG. 3 is matched with the drum kiss point kp before the start of casting, the side edge 8e of the inclined surface 8d and the peripheral edge 1d of the seal portion are matched, and the protrusion 8 slides. It is formed so that the dynamic surface width and the sliding surface width of the seal portion 1c match. Therefore, when the side weir 2 is raised at a speed corresponding to the abrasion speed of the projection 8, the positional relationship between the side edge 8e of the inclined surface 8d and the peripheral edge 1d of the seal portion is maintained throughout casting, and as a result, In addition, it is possible to maintain the initial seal surface width and prevent sealing failure. In addition, since the sliding surface width of the projection 8 and the sealing portion 1c match, no wear groove (unworn portion) is formed in the projection 8. Therefore, the drum gap is opened by the bite of the metal, and the seal portion 1c is
There is no problem that the vehicle rides on the unworn part and causes poor sealing.
【００２０】次に、本発明の双ドラム式連続鋳造装置に
よる薄帯鋳片の鋳造方法について説明する。図１及び図
２に示すように、傾斜面８ａの上端８ｂをドラムキス点
ｋｐから上方２０ｍｍ以内の範囲に位置させ、サイド堰
２を押圧装置１２によって０．１〜０．２ｋｇ／ｍｍ2
程度の圧力でドラム端面１ａに押し付けた状態で、図７
に示すように、プールＰ内に溶鋼Ｒを連続供給し、一対
のドラム１、１の周面で凝固シェルｇを生成させ、ドラ
ム１、１を図２中の矢印方向へ回転させて一対の凝固シ
ェルｇ、ｇ同士をドラムキス点ｋｐで圧着させ、薄帯鋳
片ｓを鋳造する。Next, a method of casting a thin strip by the twin-drum continuous casting apparatus of the present invention will be described. As shown in FIGS. 1 and 2, the upper end 8 b of the inclined surface 8 a is positioned within a range within 20 mm above the drum kiss point kp, and the side weir 2 is pressed by the pressing device 12 to 0.1 to 0.2 kg / mm 2.
FIG. 7 shows a state in which the pressure is
As shown in FIG. 2, the molten steel R is continuously supplied into the pool P, a solidified shell g is generated on the peripheral surfaces of the pair of drums 1 and 1, and the drums 1 and 1 are rotated in the direction of the arrow in FIG. The solidified shells g are pressed together at a drum kiss point kp to cast a thin strip s.
【００２１】鋳造に伴って図４及び図５に示すサイド堰
の突起部８は、ドラムのシール部１ｃとの摺動接触によ
る磨耗や、ドラム端部に生成した凝固シェル等による浸
食・溶損により、図１２に示すように、耐火物損傷部ｄ
が形成されて進行し、そのまま放置すると溶鋼洩れ等の
トラブルが発生する。The projections 8 of the side weirs shown in FIG. 4 and FIG. 5 due to the casting cause wear due to sliding contact with the seal portion 1c of the drum, and erosion and erosion due to a solidified shell formed at the end of the drum. As a result, as shown in FIG.
Is formed and proceeds, and if left as it is, troubles such as molten steel leakage will occur.
【００２２】そこで、図１に示す昇降駆動手段１４を操
作して、突起部８の損傷速度（鋳造経過時間）に応じた
速度でサイド堰２を、例えば、毎分１ｍｍ以下のゆっく
りとした速度で連続的あるいは間欠的に上昇させる。図
６に示すように、サイド堰２をＡ位置（破線）からＢ位
置（実線）へとシフトさせると、Ａ位置で生じた損傷部
ａ〜ｂはａ’〜ｂ’へと移動する。その結果、ドラムの
シール部１ｃと摺動接触するサイド堰耐火物の面は、今
まで該シールと接触していなかった下方の新しい面とな
る。Therefore, the elevation drive means 14 shown in FIG. 1 is operated to move the side weir 2 at a speed corresponding to the damage speed of the projection 8 (elapsed casting time), for example, at a slow speed of 1 mm or less per minute. To increase continuously or intermittently. As shown in FIG. 6, when the side weir 2 is shifted from the position A (broken line) to the position B (solid line), the damaged portions ab generated at the position A move to a′-b ′. As a result, the surface of the side weir refractory that is in sliding contact with the seal portion 1c of the drum becomes a new lower surface that has not been in contact with the seal.
【００２３】サイド堰２の上昇に伴ってサイド堰２の下
端が上昇する。従来のドラムでは、サイド堰２の下端が
図６に示すドラムキス点ｋｐを超えて上昇すると、サイ
ド堰２の下端から溶鋼洩れが生じ易くなるが、本発明に
おいては、図１及び図３に示すように突起部８の下端面
を傾斜面８ａで形成しているので、サイド堰２の下端が
上昇しても、溶鋼洩れが生じない。As the side weir 2 rises, the lower end of the side weir 2 rises. In the conventional drum, when the lower end of the side weir 2 rises above the drum kiss point kp shown in FIG. 6, molten steel leaks easily from the lower end of the side weir 2, but in the present invention, it is shown in FIGS. As described above, since the lower end surface of the projection 8 is formed by the inclined surface 8a, even if the lower end of the side weir 2 rises, no molten steel leaks.
【００２４】図３は、鋳造途中における傾斜面８ａを拡
大して示す図である。図中、破線で囲った部分は耐火物
の磨耗した部分である。図３において、鋳造当初は、傾
斜面８ａの上端８ｂはドラムキス点ｋｐに位置している
が、サイド堰２を突起部８の磨耗速度に応じた速度で上
昇させると、ドラム端面１ａ（１ｃ）と摺動接触する傾
斜面８ａの上端８ｂは傾斜面８ａに沿って移動してドラ
ムキス点ｋｐの位置を保つ。最終的には、傾斜面８ａの
下端８ｃがドラムキス点ｋｐに到達したときサイド堰２
の寿命が終了する。FIG. 3 is an enlarged view showing the inclined surface 8a during casting. In the figure, the portion surrounded by a broken line is a portion where the refractory is worn. In FIG. 3, at the beginning of casting, the upper end 8b of the inclined surface 8a is located at the drum kiss point kp. However, when the side weir 2 is raised at a speed corresponding to the abrasion speed of the projection 8, the drum end surface 1a (1c) is obtained. The upper end 8b of the inclined surface 8a that comes into sliding contact with the main body moves along the inclined surface 8a to maintain the position of the drum kiss point kp. Finally, when the lower end 8c of the inclined surface 8a reaches the drum kiss point kp, the side weir 2
The lifespan ends.
【００２５】従来のサイド堰では、上昇シフトに伴って
図８に示すように、突起部８の摺動面（シール面）の幅
が、図８（Ａ）のｗ1 から図８（Ｂ）のｗ2 へと連続的
に狭くなってゆき、シール機能が低下する。サイド堰２
をさらに上昇させると、突起部８はドラム間隙ｋに押し
込まれてシール機能を完全に失う。[0025] In conventional side weirs, with increasing shift as shown in FIG. 8, the width of the sliding surface of the projection portion 8 (the seal surface), FIG from w 1 in FIG. 8 (A) 8 (B) of Yuki continuously narrowed to w 2, the sealing function is reduced. Side weir 2
Is further raised, the protrusion 8 is pushed into the drum gap k, and the sealing function is completely lost.
【００２６】請求項２に記載の本発明においては、図
２、図４及び図５に示すように、突起部８の外側面を傾
斜面８ｄとしている。図９に、傾斜面８ｄを拡大して示
す。図９において、破線で囲った部分は耐火物の磨耗し
た部分であり、磨耗前の突起部８のシール面幅はｗ1 で
あったが、突起部８の磨耗速度に応じた速度でサイド堰
２を上昇シフトさせた結果、磨耗後のシール面幅もｗ1
である。このように、突起部８の外側面を傾斜面８ｄと
することにより、サイド堰２の上昇シフトに伴うシール
面幅ｗ1 の減少を解消することができる。According to the second aspect of the present invention, as shown in FIGS. 2, 4 and 5, the outer surface of the projection 8 is an inclined surface 8d. FIG. 9 shows the inclined surface 8d in an enlarged manner. In FIG. 9, a portion surrounded by a broken line is a portion where the refractory is worn, and the seal surface width of the protrusion 8 before the wear is w 1 , but the side dam is at a speed corresponding to the wear speed of the protrusion 8. As a result of the upward shift of 2, the seal surface width after wear is also w 1
It is. Thus, the outer surface of the projecting portion 8 by an inclined surface 8d, it is possible to eliminate the decrease in the sealing surface width w 1 with increasing shift of the side weirs 2.
【００２７】請求項３及び４に記載の発明においては、
図１及び図５に示すように、ドラム１の周面両端部に段
付き部１ｂを設けている。この段付き部１ｂにより、ド
ラム両端部の凝固シェルｇ、ｇ同士を圧着させると、図
７に示すように、シェル圧着開始点はｐ1 からｐ2 へと
上方シフトする。その結果、図６に示すように、サイド
堰２をＡ位置からＢ位置へとシフトさせても、サイド堰
２の下端から溶鋼洩れが生じることはなく、図７に示す
ように、サイド堰２の上昇ストロークをｈ1 からｈ2 へ
と大きくすることができる。According to the third and fourth aspects of the present invention,
As shown in FIGS. 1 and 5, a stepped portion 1 b is provided at both ends of the peripheral surface of the drum 1. The stepped portion 1b, the solidified shell g of the drum end portions, which when pressed the g together, as shown in FIG. 7, the shell crimping starting point is shifted upward from p 1 to p 2. As a result, even if the side weir 2 is shifted from the position A to the position B as shown in FIG. 6, no molten steel leaks from the lower end of the side weir 2, and as shown in FIG. the increase stroke can be increased from h 1 to h 2.
【００２８】本発明において、サイド堰２を上昇シフト
する場合は、傾斜面８ａの上端８ｂは、ドラムキス点ｋ
ｐから上方２０ｍｍ以内の範囲に位置させて鋳造を開始
することが望ましい。その理由は、鋳造初期の状態で
は、凝固シェルｇがドラムキス点ｋｐで圧着される際
に、半凝固圧延によりドラムキス点ｋｐ近傍で「幅広が
り」を起こし、このとき、傾斜面８ａの上端８ｂがドラ
ムキス点ｋｐより下方に位置すると、この「幅広がり」
をしようとする力が耐火物（サイド堰）に作用して耐火
物を損傷させたり、サイド堰を押し広げたりして、シー
ル性が低下するからである。In the present invention, when the side weir 2 is shifted upward, the upper end 8b of the inclined surface 8a is positioned at the drum kiss point k.
It is desirable that casting be started while being positioned within a range of 20 mm or more from p. The reason is that in the initial casting state, when the solidified shell g is pressed at the drum kiss point kp, a "widening" occurs near the drum kiss point kp due to semi-solid rolling, and at this time, the upper end 8b of the inclined surface 8a is raised. If it is located below the drum kiss point kp, this "widening"
This is because the force to act on the refractory (side weir) acts on the refractory and damages the refractory or pushes the side weir down, so that the sealing performance is reduced.
【００２９】また、鋳造開始時に傾斜面８ａの上端８ｂ
をドラムキス点ｋｐより下方に位置させると、突起部８
のドラムキス点ｋｐより下方部にドラム円周縁と対応し
て形成される円弧状の磨耗痕が、サイド堰上昇の障害と
なるからである。傾斜面８ａの上端８ｂをドラムキス点
ｋｐから上方２０ｍｍ以内とした理由は、２０ｍｍを超
えて位置させると、傾斜面８ａから未凝固溶鋼が洩れ出
してシール性が低下するからである。なお、以上の説明
では、突起部８の下端面の傾斜面８ａ及び外側面の傾斜
面８ｄを傾斜面としたが、傾斜面に代えて複数の段を付
けた階段状としてもよい。この場合、段差が５ｍｍを超
えると、チッピングが生じ易くなるため、段差は５ｍｍ
以下が望ましい。At the start of casting, the upper end 8b of the inclined surface 8a
Is located below the drum kiss point kp, the protrusion 8
This is because an arc-shaped wear mark formed below the drum kiss point kp and corresponding to the drum circumferential edge hinders the rise of the side weir. The reason why the upper end 8b of the inclined surface 8a is set within 20 mm above the drum kiss point kp is that if the upper end 8b is located beyond 20 mm, unsolidified molten steel leaks out from the inclined surface 8a and the sealing performance is reduced. In the above description, the inclined surface 8a on the lower end surface and the inclined surface 8d on the outer surface of the protruding portion 8 are inclined surfaces, but may be stepped with a plurality of steps instead of the inclined surfaces. In this case, if the step exceeds 5 mm, chipping is likely to occur.
The following is desirable.
【００３０】[0030]
【実施例】図１０は、サイド堰を上昇シフトする方法に
おいて、サイド堰突起部の下端面及び外側面に傾斜面を
設け、ドラム周面両端部に段付き部を設けた発明例と、
傾斜面及び段付き部を設けなかった比較例における、サ
イド堰上昇シフト可能量（溶鋼洩れが開始したときのサ
イド堰上昇量）を示す。発明例によれば、サイド堰上昇
シフト可能量を従来と比べて約３倍に拡大させることが
できる。図１１は、比較例の鋳造可能時間を１とした場
合における、サイド堰の上昇シフト量と鋳造時間延長率
の関係を示す。発明例によれば、鋳造可能時間を、比較
例に比べ１．５〜６倍に延長することができる。FIG. 10 shows an example of the invention in which a slope is provided on a lower end surface and an outer surface of a side weir projection and a step is provided on both ends of a drum peripheral surface in a method of ascending and shifting a side weir.
9 shows the shift amount of side weir rise (the rise amount of side weir when molten steel leakage starts) in a comparative example in which an inclined surface and a stepped portion were not provided. According to the invention example, the shift amount of the side weir rising shift can be increased about three times as compared with the related art. FIG. 11 shows the relationship between the upward shift amount of the side dam and the casting time extension rate when the casting time of the comparative example is set to 1. According to the invention, the casting time can be extended 1.5 to 6 times as compared with the comparative example.
【００３１】[0031]
【発明の効果】本発明によれば、双ドラム式連続鋳造に
おいて、サイド堰耐火物の寿命を延長することができ、
その結果、設備コストを大幅に削減することができ、ま
た、長時間の連続鋳造により生産能率を大幅に向上させ
ることができる。さらには、サイド堰耐火物の浸食・溶
損による鋳片のドラムへの巻き付きや、鋳片エッジ部が
引き裂かれることによる鋳造停止などのトラブルを回避
して、安定して鋳造を行うことができる。According to the present invention, in the twin-drum continuous casting, the life of the side dam refractory can be extended,
As a result, the equipment cost can be significantly reduced, and the production efficiency can be greatly improved by long-time continuous casting. Furthermore, it is possible to stably perform casting by avoiding troubles such as winding of the slab around the drum due to erosion and erosion of the refractory of the side dam and stopping of casting due to tearing of the slab edge. .
【図１】本発明の実施の形態を説明する双ドラム式連続
鋳造装置の一部正面図である。FIG. 1 is a partial front view of a twin-drum continuous casting apparatus illustrating an embodiment of the present invention.
【図２】図１のＩ−Ｉ線矢視の正面図である。FIG. 2 is a front view taken along the line II of FIG. 1;
【図３】図２の下部を拡大して示す断面図である。FIG. 3 is an enlarged sectional view showing a lower part of FIG. 2;
【図４】図２のII−II線矢視の平断面である。FIG. 4 is a plan sectional view taken along line II-II of FIG. 2;
【図５】図２のIII −III 線矢視の平断面である。FIG. 5 is a plan sectional view taken along line III-III in FIG. 2;
【図６】サイド堰の上昇シフトによる耐火物損傷部の移
動を説明する図である。FIG. 6 is a view for explaining movement of a refractory damaged portion due to an upward shift of a side weir.
【図７】段付き部によるシェル圧着開始位置の上昇シフ
トを説明する図である。FIG. 7 is a view for explaining an upward shift of a shell crimping start position by a stepped portion.
【図８】従来のサイド堰におけるシール面幅の減少を説
明する図である。FIG. 8 is a diagram illustrating a reduction in the seal surface width in a conventional side dam.
【図９】本発明の装置におけるシール面幅を示す図であ
る。FIG. 9 is a view showing a seal surface width in the device of the present invention.
【図１０】鋳造板厚毎のサイド堰上昇シフト可能量を示
す図である。FIG. 10 is a view showing a shift amount of a side weir rising shift for each casting plate thickness.
【図１１】サイド堰上昇シフト量毎の鋳造時間延長率を
示す図である。FIG. 11 is a diagram showing a casting time extension rate for each side weir rising shift amount.
【図１２】サイド堰耐火物の浸食・溶解状況を示す図で
ある。FIG. 12 is a diagram showing the erosion and dissolution state of the side dam refractory.
１…ドラム １ａ…ドラム端面 １ｂ…ドラムの段付き部 １ｃ…ドラムのシール部 １ｄ…シール部の周縁 ２…サイド堰 ３…耐火物ケース ４…サイド堰耐火物 ５…不定型耐火物 ６…耐火物れんが ７…セラミック板 ８…略Ｖ字状の突起部 ８ａ…突起部下端面の傾斜面 ８ｂ…突起部下端面の傾斜面の上端 ８ｃ…突起部下端面の傾斜面の下端 ８ｄ…突起部外側面の傾斜面 ８ｅ…突起部外側面の傾斜面の側縁 ９…補剛体 １０…昇降式支持フレーム １１…支持軸 １２…押圧装置 １３…垂直ガイド １４…昇降駆動手段 Ｐ…プール Ｒ…溶鋼 ｓ…薄帯鋳片 ｇ…凝固シェル ｐ1 、ｐ2 …シェル圧着開始点 ｗ1 、ｗ2 …シール面幅 ｈ1 、ｈ2 …サイド堰の上昇ストローク ｋｐ…ドラムキス点 ａ〜ｂ、ａ’〜ｂ’、ｄ…サイド堰耐火物の損傷部 ｋ…ドラム間隙DESCRIPTION OF SYMBOLS 1 ... Drum 1a ... Drum end surface 1b ... Drum stepped part 1c ... Drum seal part 1d ... Periphery of a seal part 2 ... Side weir 3 ... Refractory case 4 ... Side weir refractory 5 ... Irregular refractory 6 ... Refractory Brick 7 ... Ceramic plate 8 ... Substantially V-shaped protrusion 8a ... Slope of lower end of protrusion 8b ... Top of slope of lower end of protrusion 8c ... Lower end of slope of lower end of protrusion 8d ... Outer side of protrusion Slope 8e Side edge of the slope on the outer surface of the projection 9 Stiffener 10 Elevating support frame 11 Support shaft 12 Pressing device 13 Vertical guide 14 Elevating drive means P Pool R R molten steel s Thin Obiihen g ... solidified shell p 1, p 2 ... shell crimping starting point w 1, w 2 ... seal surface width h 1, h 2 ... side weirs rise stroke kp ... Doramukisu point a~b, a'~b ' , D: Damaged part of refractory on side dam k: Dora Gap
───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹内 友英 山口県光市大字島田3434番地 新日本製鐵 株式会社光製鐵所内 (72)発明者 新井 貴士 山口県光市大字島田3434番地 新日本製鐵 株式会社光製鐵所内 Ｆターム(参考） 4E004 DA13 NA05 NB07 RA01 RA07 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Tomohide Takeuchi 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Nippon Steel Corporation Hikari Works (72) Inventor Takashi Arai 3434 Shimada, Hikari-shi, Hikari-shi, Yamaguchi New Japan F-term (reference) in Hikari Works, Ltd. 4E004 DA13 NA05 NB07 RA01 RA07
Claims (4)
を押し付けた双ドラム式連続鋳造装置において、該一対
のサイド堰のそれぞれの下端面を面取方向の傾斜面で形
成したことを特徴とする双ドラム式連続鋳造装置。1. A twin-drum continuous casting apparatus in which a pair of side weirs is pressed against both end surfaces of a pair of drums, wherein each lower end surface of the pair of side weirs is formed as an inclined surface in a chamfering direction. Twin-drum continuous casting machine.
を押し付けた双ドラム式連続鋳造装置において、該一対
のドラムのそれぞれの端面外周部に、リング状で突出し
たシール部を設け、該一対のサイド堰のそれぞれの該シ
ール部との接触面に沿って突出部を設け、該突出部の外
側面を面取方向の傾斜面で形成したことを特徴とする双
ドラム式連続鋳造装置。2. A twin-drum continuous casting apparatus in which a pair of side weirs are pressed against both end surfaces of a pair of drums, a ring-shaped projecting seal portion is provided on the outer peripheral portion of each end surface of the pair of drums. A twin-drum continuous casting apparatus comprising: a pair of side weirs each having a protruding portion provided along a contact surface with the seal portion, and an outer surface of the protruding portion formed by an inclined surface in a chamfering direction.
耐火物を押し付けた双ドラム式連続鋳造装置において、
該一対のドラムのそれぞれの周面両端部に、該周面両端
部における一対の凝固シェルを圧着する段付き部を設
け、該一対のサイド堰のそれぞれに、該サイド堰をドラ
ム端面に沿って上昇させる昇降駆動手段を設けたことを
特徴とする双ドラム式連続鋳造装置。3. A twin-drum continuous casting apparatus in which a pair of side dam refractories is pressed against both end surfaces of a pair of drums,
At each end of the peripheral surface of the pair of drums, a stepped portion for pressing a pair of solidified shells at both ends of the peripheral surface is provided, and for each of the pair of side weirs, the side weir is formed along the drum end surface. A twin-drum continuous casting apparatus, comprising a lifting drive means for raising.
を押し付けた双ドラム式連続鋳造装置により薄帯鋳片を
鋳造する方法において、該一対のドラムのそれぞれの周
面両端部に、該周面両端部における一対の凝固シェルを
圧着する段付き部を設け、該一対のサイド堰のそれぞれ
の下端をドラムキス点から上方２０ｍｍの範囲内に位置
させた状態で鋳造を開始し、鋳造中、前記一対のサイド
堰のそれぞれを、その磨耗速度に応じた速度で上昇させ
ることを特徴とする双ドラム式連続鋳造方法。4. A method of casting a thin strip by a twin-drum continuous casting apparatus in which a pair of side weirs is pressed against both end surfaces of a pair of drums, Providing a stepped portion for pressing a pair of solidified shells at both ends of the peripheral surface, starting casting with the lower ends of the pair of side weirs positioned within a range of 20 mm above the drum kiss point, during casting, A twin-drum continuous casting method, wherein each of the pair of side weirs is raised at a speed corresponding to a wear speed thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000142458A JP3540980B2 (en) | 1999-07-16 | 2000-05-15 | Twin-drum continuous casting method and apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11-203491 | 1999-07-16 | ||
| JP20349199 | 1999-07-16 | ||
| JP2000142458A JP3540980B2 (en) | 1999-07-16 | 2000-05-15 | Twin-drum continuous casting method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001087842A true JP2001087842A (en) | 2001-04-03 |
| JP3540980B2 JP3540980B2 (en) | 2004-07-07 |
Family
ID=26513953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000142458A Expired - Lifetime JP3540980B2 (en) | 1999-07-16 | 2000-05-15 | Twin-drum continuous casting method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3540980B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009041777A3 (en) * | 2007-09-28 | 2009-06-11 | Posco | Strip edge shape control apparatus and method in strip casting process |
| CN106964762A (en) * | 2015-12-21 | 2017-07-21 | Posco公司 | The edge guard of double-roll type thin plate casting machine |
| CN111278585A (en) * | 2016-11-07 | 2020-06-12 | 日本制铁株式会社 | Side seal device, twin roll type continuous casting device, and method for manufacturing thin-walled cast piece |
-
2000
- 2000-05-15 JP JP2000142458A patent/JP3540980B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009041777A3 (en) * | 2007-09-28 | 2009-06-11 | Posco | Strip edge shape control apparatus and method in strip casting process |
| JP2010536580A (en) * | 2007-09-28 | 2010-12-02 | ポスコ | Strip edge shape control apparatus and method in strip casting process |
| AU2008304045B2 (en) * | 2007-09-28 | 2011-10-06 | Posco | Strip edge shape control apparatus and method in strip casting process |
| CN106964762A (en) * | 2015-12-21 | 2017-07-21 | Posco公司 | The edge guard of double-roll type thin plate casting machine |
| US9815110B2 (en) | 2015-12-21 | 2017-11-14 | Posco | Edge dam of twin roll type strip caster |
| CN111278585A (en) * | 2016-11-07 | 2020-06-12 | 日本制铁株式会社 | Side seal device, twin roll type continuous casting device, and method for manufacturing thin-walled cast piece |
| CN111278585B (en) * | 2016-11-07 | 2022-08-19 | 日本制铁株式会社 | Side seal device, twin roll type continuous casting device, and method for manufacturing thin-walled cast piece |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3540980B2 (en) | 2004-07-07 |
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