JPS5814034Y2 - Tandish Weir - Google Patents
Tandish WeirInfo
- Publication number
- JPS5814034Y2 JPS5814034Y2 JP10808277U JP10808277U JPS5814034Y2 JP S5814034 Y2 JPS5814034 Y2 JP S5814034Y2 JP 10808277 U JP10808277 U JP 10808277U JP 10808277 U JP10808277 U JP 10808277U JP S5814034 Y2 JPS5814034 Y2 JP S5814034Y2
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- weir
- tundish
- hole
- flow
- 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
Landscapes
- Continuous Casting (AREA)
Description
【考案の詳細な説明】
本考案は、連続鋳造における溶鋼中の非金属介在物の分
離性能が良好で、且鋳造操業に好結果をもたらす、連続
鋳造用のタンディシュの堰に関する。[Detailed Description of the Invention] The present invention relates to a tundish weir for continuous casting that has good performance in separating non-metallic inclusions in molten steel during continuous casting and brings good results to casting operations.
現在、鋼の連続鋳造においては、鋳鍋中の溶鋼は、タン
テ゛イシュを介してモールド中に注入されているが、そ
の際溶鋼中に懸濁する非金属介在物は、タンディシュ中
で分離させられ、清浄な溶鋼がモールド中に注入される
。Currently, in continuous steel casting, molten steel in a cast pot is injected into a mold via a tundish, and non-metallic inclusions suspended in the molten steel are separated in the tundish. Clean molten steel is poured into the mold.
この非金属介在物分離の手段として、従来タンディシュ
の内部に耐火物製の堰を設けることが行われている。Conventionally, as a means for separating non-metallic inclusions, a refractory weir is provided inside the tundish.
本願においてタンディシュ堰と称するものは、溶鋼中の
非金属介在物の分離を促進するために、タンディシュ内
に、溶鋼の流れをさえぎる方向に設けられた、耐火物の
仕切り板であって、従来は次に述べるようなものが用い
られていた。In this application, what is referred to as a tundish weir is a refractory partition plate installed in the tundish in a direction that blocks the flow of molten steel in order to promote the separation of non-metallic inclusions in the molten steel. The following were used.
その１つは、貫通孔を有する堰であって、その設置の状
態は第１図に示される。One of them is a weir with a through hole, the installation of which is shown in FIG.
第１図は貫通孔を有する堰を備えたタンテ゛イシュを示
すもので、図に於て１は鉄皮、２は耐火物の内張り、３
は注出口、４はストッパー、５は複数の貫通孔６を有し
、タンテ゛イシュを横断し、定常操業における湯面７よ
りも高い高さの耐火物製の堰である。Figure 1 shows a tannish equipped with a weir having through holes. In the figure, 1 is the iron skin, 2 is the refractory lining, and 3
4 is a spout, 4 is a stopper, and 5 is a refractory weir having a plurality of through holes 6, which traverses the tank and has a height higher than the hot water level 7 in normal operation.
鋳鍋の注出ノズル８よりタンテ゛イシュに注入された溶
鋼９は、この堰の孔６を通って注出口３よりタンディシ
ュを出て連続鋳造モールド（図示せず）に注入される。Molten steel 9 injected into the tundish from the pouring nozzle 8 of the casting pot passes through the hole 6 of this weir, exits the tundish through the spout 3, and is poured into a continuous casting mold (not shown).
この際、非金属介在物は孔の表面に付着し、或は溶鋼表
面に浮上して溶鋼より分離されるものであるが、この堰
においては、溶鋼は底流をつくりやすいので、その分離
効果があまり高くない。At this time, nonmetallic inclusions adhere to the surface of the hole or float to the surface of the molten steel and are separated from the molten steel, but in this weir, the molten steel tends to create an underflow, so the separation effect is It's not very expensive.
またタンテ゛イシュの内張り、堰等の耐火物部分は１連
鋳毎に更新されるもので貫通孔を有する堰は、耐火物の
使用量が比較的多く且製作も困難なのでコスト高となる
という欠点もあった。In addition, the refractory parts such as the lining of the tannish and weirs are renewed every time continuous casting is carried out, and weirs with through holes have the disadvantage of being expensive because they require a relatively large amount of refractories and are difficult to manufacture. there were.
上記以外に従来用いられたタンディシュ堰として、オー
バーフロー堰があり、その設置状態は第２図に示される
。In addition to the above, there is an overflow weir as a conventionally used tundish weir, and its installation state is shown in Fig. 2.
第２図はオーバーフロー堰を備えたタンディシュを示す
もので、図において１０がオーバーフロー堰である。FIG. 2 shows a tundish equipped with an overflow weir, and in the figure 10 is the overflow weir.
この堰は、鋳鍋のノズル８より注出される溶鋼９の定常
操業における湯面７よりも低い高さを有し、タンディシ
ュを横断して溶鋼流をさえぎる方向に設けられ、溶鋼流
はこの堰につき当ってこれを越える上昇流となり、溶鋼
中の非金属介在物の浮上分離を促進するという効果を生
じる。This weir has a height lower than the level 7 of the molten steel 9 poured out from the nozzle 8 of the cast pot in steady operation, and is provided in a direction to cross the tundish and block the flow of molten steel, and the molten steel flow is directed to the weir. This creates an upward flow that exceeds this, which has the effect of promoting floating separation of non-metallic inclusions in the molten steel.
またオーバーフロー堰は、前述の貫通孔を有する堰に比
べて、耐火物の使用量も少く、製作コストも安い。In addition, the overflow weir requires less refractory material and is cheaper to manufacture than the weir with the above-mentioned through holes.
然しなから、従来のオーバーフロー堰によれば、溶鋼を
モールドに注入開始するにあたって、溶鋼はタンディシ
ュの埋置（１０−１０の間）に満されるまでの時間を経
過した後に、オーバーフローして注出口３の部分に達す
るものであるので、このときの溶鋼温度は低下しており
、鋳造開始時のモールド上部の温度も低下し、非金属介
在物も浮上しにく・、未凝固の鋳片がモールド表面で凝
固したスラグをかみ込むことによりその表面状態を悪化
させるという欠点があった。However, according to the conventional overflow weir, when starting to pour molten steel into the mold, the molten steel overflows and pours after the time has elapsed until the tundish is filled (between 10 and 10 minutes). Since the molten steel reaches the outlet 3, the temperature of the molten steel at this time is low, and the temperature at the top of the mold at the start of casting is also low, making it difficult for non-metallic inclusions to float and for unsolidified slabs to rise. This has the disadvantage that the slag that has solidified on the surface of the mold gets caught in the mold, thereby deteriorating the surface condition of the mold.
更に、１連鋳終了後に埋置に溶鋼が残留し、鋳造歩留を
低下させるということも欠点として挙げられる。Furthermore, another drawback is that molten steel remains in the burial chamber after one series of continuous casting is completed, reducing the casting yield.
本考案は、上記のような従来のタンディシュ堰の欠点を
除去して、製作し易く且つ非金属介在物の浮上分離の効
果も高く、良好な鋳片を得ることの出来る、タンテ゛イ
シュ堰を提供するものである。The present invention eliminates the drawbacks of the conventional tundish weir as described above, and provides a tundish weir that is easy to manufacture, has a high effect of flotation and separation of non-metallic inclusions, and can obtain good slabs. It is something.
次に、本考案のタンテ゛イシュ堰を、第３図及び第４図
に示す実施例に基いて説明する。Next, the tandem weir of the present invention will be explained based on the embodiment shown in FIGS. 3 and 4.
第３図は本考案のタンテ゛イシュ堰の設置状態を示すも
ので、１１及び１２の部分の組合せが本考案のタンテ゛
イシュ堰を構成する。FIG. 3 shows the installation state of the tandem weir of the present invention, and the combination of parts 11 and 12 constitutes the tangent weir of the present invention.
第４図は、本考案のタンテ゛イシュ堰の１つの型を示す
。FIG. 4 shows one type of tandem weir of the present invention.
図に於て、１１の部分は、溶鋼の注入側に位置し、従来
のオーバーフロー堰と同じく定常操業における湯面７よ
りも低い高さを有し、溶鋼流をさえぎるようにタンディ
シュを横断する耐火物の仕切り板で、従来のオーバーフ
ロー堰と異り、板がタンディシュの底に接する部分にの
み１個以上の貫通孔１３が設けられ鋳造の初期及び末期
に溶鋼の流通を可能にしである。In the figure, part 11 is located on the injection side of molten steel, has a height lower than the molten metal level 7 in steady operation like a conventional overflow weir, and has a fireproof structure that crosses the tundish so as to block the flow of molten steel. Unlike conventional overflow weirs, one or more through holes 13 are provided only in the part where the plate contacts the bottom of the tundish, allowing the flow of molten steel at the beginning and end of casting.
（以下１１の部分を有孔オーバーフロー板と称する。(Hereinafter, the portion 11 will be referred to as a perforated overflow plate.
）有孔オーバフロー板の貫通孔は、鋳造初期及び末期の
溶鋼を円滑に流通させる大きさがあれば十分で、定常操
業の場合は次に述べるバッフル板の作用により、溶鋼の
一部分だけがこの孔を通り、大部分が板をオーバーフロ
ーするようにその大きさを決定される。) The through-holes of the perforated overflow plate need only be large enough to allow the molten steel to flow smoothly during the initial and final stages of casting.During regular operation, only a portion of the molten steel flows through these holes due to the action of the baffle plate described below. and is sized so that most of it overflows the plate.
孔の形は、円形、長方形、多角形等種々使用可能である
。Various shapes of the hole can be used, such as circular, rectangular, and polygonal.
本考案のタンディシュ堰の１２の部分は、上記有孔オー
バーフロー板の各貫通孔の外側（溶鋼の出口側）に、該
孔に面して、該孔より流出する溶鋼をさえぎる位置に設
けられた耐火物製の一種のバッフル板であって、その貫
通孔に面する断面積は貫通孔の断面積よりも広いが、そ
の上部及び両側より溶鋼の流通が可能な大きさを有し、
溶鋼流がこれにつき当って上昇を生じ得るような距離内
に配置される。The 12 parts of the tundish weir of the present invention are provided on the outside of each through hole of the perforated overflow plate (on the exit side of the molten steel), at a position facing the hole and blocking the molten steel flowing out from the hole. A type of baffle plate made of refractory material, whose cross-sectional area facing the through-hole is wider than the cross-sectional area of the through-hole, but has a size that allows molten steel to flow from the top and both sides,
It is located within such a distance that the molten steel flow can impinge upon it and cause an upward movement.
本考案のタンディシュ堰には以下のような利点がある。The Tandish weir of the present invention has the following advantages:
本考案によれば、鋳鍋より溶鋼の注入を開始する時には
、溶鋼は堰の下部の貫通孔を通って短時間に注出口の部
分に達し、タンテ゛イシュの底の全面にわたり殆んど同
時に溶鋼を満すことが出来るので、注入初期に於て特に
溶鋼温度の低下する部分はなく、連続鋳造モールドに注
入された溶鋼の温度も従来のオーバーフロー堰使用の場
合の如くには低下せず、鋳片の初期鋳造部分の品質を向
上させることが出来る。According to the present invention, when starting to pour molten steel from the cast pot, the molten steel passes through the through hole at the bottom of the weir and reaches the spout in a short time, and almost simultaneously pours the molten steel over the entire bottom of the tangish. Therefore, there is no part where the temperature of the molten steel drops in the initial stage of pouring, and the temperature of the molten steel poured into the continuous casting mold does not drop as much as when using a conventional overflow weir, and the slab The quality of the initial casting part can be improved.
また定常操業中は、バッフル板１２の効果により貫通孔
を出る溶鋼流は制約され、溶鋼の大部分は有孔オーバー
フロー板１１を越える上昇流となり、一部貫通孔を通る
溶鋼もバッフル板１２につき当り上昇流をつくるので、
非金属介在物の浮上分離が促進される。Furthermore, during steady operation, the flow of molten steel leaving the through hole is restricted by the effect of the baffle plate 12, and most of the molten steel flows upwardly over the perforated overflow plate 11, and some of the molten steel that passes through the through hole also reaches the baffle plate 12. Since the hit creates an upward flow,
The floating separation of non-metallic inclusions is promoted.
更に、本考案によれば、タンテ゛イシュ内の溶鋼は、鋳
造終了時に、従来のオーバーフロー堰の場合の如くにせ
き止められることがなく、貫通孔を通じて流通出来るの
で、タンテ゛イシュ内の残鋼を著しく少くするように操
業出来る。Furthermore, according to the present invention, the molten steel in the tangent is not blocked at the end of casting as in the case of a conventional overflow weir, but can flow through the through hole, so that the remaining steel in the tangent can be significantly reduced. can be operated.
このために従来に比して８〜１０ ｔの歩留向上が可能
となった。For this reason, it has become possible to improve the yield by 8 to 10 tons compared to the conventional method.
また有孔オーバーフロー板は、従来の貫通孔を有する堰
よりも小型で耐火物の消費が少く、且成型も容易でコス
トの安いことも利点である。Further, the perforated overflow plate has the advantage that it is smaller than a conventional weir having through holes, consumes less refractory material, is easy to mold, and is inexpensive.
尚、本考案のタンプ゛イシュ堰は、鋼の連続鋳造のみな
らず、非鉄金属の鋳造に対しても応用出来るものである
。The tampuish weir of the present invention can be applied not only to the continuous casting of steel but also to the casting of non-ferrous metals.
以上述べたように、本考案のタンテ゛イシュ堰は、従来
の貫通孔を有する堰に比べて製作コストが安く、溶鋼に
上昇流を生じさせることが出来るので非金属介在物の除
去性能が良好で、従来のオーバーフロー堰に比べて鋳造
初期の鋳片品質を向上させ、更に鋳造の歩留を向上させ
るという種々の利点を有する優秀なタンディシュ堰であ
る。As mentioned above, the tandem weir of the present invention is cheaper to manufacture than conventional weirs with through holes, and has good performance in removing nonmetallic inclusions because it can generate upward flow in molten steel. This is an excellent tundish weir that has various advantages over conventional overflow weirs, such as improving slab quality at the initial stage of casting and further improving casting yield.
第１図は、従来の貫通孔を有する堰を設置したタンテ゛
イシュの縦断面、第２図は従来のオーバーフロー堰を設
置したタンテ゛イシュの縦断面、第３図は本考案のタン
テ゛イシュ堰を設置したタンディシュの縦断面、第４図
は本考案のタンディシュ堰の１型を示す。
２・・・・・・タンテ゛イシュの内張り、３・・・・・
・注出口、４・・・・・・ストッパー、５・・・・・・
貫通孔を有する堰、１０・・・・・・オーバーフロー堰
、１１・・・・・・有孔オーバーフロー板、１２・・・
・・・バッフル板。Figure 1 shows a longitudinal section of a tundish installed with a conventional weir having through holes, Figure 2 shows a longitudinal section of a tundish installed with a conventional overflow weir, and Figure 3 shows a tundish installed with a tundish weir of the present invention. The longitudinal section, FIG. 4, shows a type 1 of the tandish weir of the present invention. 2... Lining of tan tissue, 3...
・Spout, 4... Stopper, 5...
Weir having through holes, 10... Overflow weir, 11... Overflow plate with holes, 12...
...baffle board.
Claims (1)
タンディシュを横断し、その高さが定常操業における湯
面より低位にあり、且タンテ゛イシュ底部に接する部分
に１つ以上の貫通孔を有する耐火物製仕切板と、該仕切
板の各貫通孔の溶鋼出口側に面して、該貫通孔より流出
する溶鋼底流をさえぎってこれに上昇流を生じさせ得る
距離内に設けられ、且該貫通孔に面する断面積が該貫通
孔よりも大きく、その上部及び両側より溶鋼の流通が可
能な大きさを有する耐火物製のバッフル板とよりなるタ
ンディシュ堰。A refractory partition that crosses the tundish in a direction that blocks the flow of molten steel injected into the tundish, has a height lower than the molten metal level in steady operation, and has one or more through holes in the part that contacts the bottom of the tundish. The partition plate is provided facing the molten steel outlet side of each through hole of the partition plate, within a distance that can block the molten steel bottom flow flowing out from the through hole and cause an upward flow thereto, and facing the through hole. A tundish weir comprising a refractory baffle plate having a cross-sectional area larger than that of the through hole and having a size that allows molten steel to flow from the top and both sides of the baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10808277U JPS5814034Y2 (en) | 1977-08-15 | 1977-08-15 | Tandish Weir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10808277U JPS5814034Y2 (en) | 1977-08-15 | 1977-08-15 | Tandish Weir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5435715U JPS5435715U (en) | 1979-03-08 |
| JPS5814034Y2 true JPS5814034Y2 (en) | 1983-03-18 |
Family
ID=29052797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10808277U Expired JPS5814034Y2 (en) | 1977-08-15 | 1977-08-15 | Tandish Weir |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814034Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3570194D1 (en) * | 1984-12-18 | 1989-06-22 | Nippon Steel Corp | Tundish for continuous casting of free cutting steel |
-
1977
- 1977-08-15 JP JP10808277U patent/JPS5814034Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5435715U (en) | 1979-03-08 |
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