JPH01107950A - Tundish for horizontal continuous casting - Google Patents

Tundish for horizontal continuous casting

Info

Publication number
JPH01107950A
JPH01107950A JP26587387A JP26587387A JPH01107950A JP H01107950 A JPH01107950 A JP H01107950A JP 26587387 A JP26587387 A JP 26587387A JP 26587387 A JP26587387 A JP 26587387A JP H01107950 A JPH01107950 A JP H01107950A
Authority
JP
Japan
Prior art keywords
molten metal
tundish
plate
casting
thin steel
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
JP26587387A
Other languages
Japanese (ja)
Inventor
Masahiro Tsuru
鶴 雅廣
Shunji Otomo
大友 俊次
Tadayoshi Shinozaki
篠崎 忠義
Yoshitaka Ishizuka
石塚 良孝
Tatsuo Saeki
佐伯 辰男
Kenichi Kobuchi
小渕 健一
Shinichi Muto
新一 武藤
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 Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP26587387A priority Critical patent/JPH01107950A/en
Publication of JPH01107950A publication Critical patent/JPH01107950A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10Supplying or treating molten metal
    • B22D11/11Treating the molten metal
    • B22D11/116Refining the metal
    • B22D11/118Refining the metal by circulating the metal under, over or around weirs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To improve the yield of molten metal and the workability by arranging refractory-made weir at interval between molten metal receiving part and casting part in a tundish and arranging plugging plate of thin steel plate at the opening part in bottom part of the weir. CONSTITUTION:The refractory-made weir 4 is arranged at interval between the molten metal receiving part 3 and the casting part 2 in the tundish 1 and also the opening part 5 passing through the molten metal 7 from the molten metal receiving part 3 to the casting part 2 is arranged at the bottom part of the weir 4. Further, the plugging plate 9 of the thin steel plate is inserted in the opening part 5 to close the opening part 5. By this method, plugging sand and the molten metal flowing into the molten metal receiving part 3 in the tundish 1 at the initial stage of the pouring does not melt the plugging plate 9 because of low temp. and the plugging plate 9 is melted by flowing of high temp. molten metal after several sec and the molten metal 7 is flowed into the casting part 2 without mixing with the molten slag 8. The molten slag 8 and the plugging sand are remained into the molten metal receiving part 3. Therefore, waste molten metal is eliminated, and the yield and the workability of the molten metal are improved.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は水平連続鋳造用タンディツシュに関する。[Detailed description of the invention] [Industrial application field] This invention relates to a tundish for horizontal continuous casting.

[従来技術] 第3図は従来の水平連続鋳造用タンディツシュの断面図
である0図示されているように取鍋25からタンディツ
シュ1にの溶湯7を注入する際に、取鍋25下部に設け
た溶湯7の排出装W29から排出するが、その注入開始
時には、前記排出装置29(ロータリーノズル等)から
、まず取鍋25のノズル11内に挿入されていた詰砂1
2が流出し、次に低温溶湯が流出する。前記詰砂12は
、タンディツシュ1から溶湯注入孔6を経由して、モー
ルド内に入り鋳片の内質欠陥となると共に、ブレークア
ウトの原因となる。又低温溶湯は溶湯注入孔6の凝固閉
塞をおこすことがある。
[Prior Art] Fig. 3 is a sectional view of a conventional horizontal continuous casting tundish. The molten metal 7 is discharged from the discharge device W29, and when the injection starts, the packed sand 1 inserted into the nozzle 11 of the ladle 25 is first discharged from the discharge device 29 (rotary nozzle, etc.).
2 flows out, and then the low temperature molten metal flows out. The packing sand 12 enters the mold from the tundish 1 via the molten metal injection hole 6, causing internal defects in the slab and causing breakouts. Furthermore, the low-temperature molten metal may solidify and clog the molten metal injection hole 6.

したがって、従来、取鍋からタンディツシュへの溶湯注
入開始時には、これらの詰砂12および低温溶湯をタン
ディツシュ1外に捨湯装置を用いて処理していた(特開
昭56−11163)、この状況を第4図及び第5図に
示す、第4図は従来の樋状の捨湯装置の平面図である。
Therefore, conventionally, when starting to pour molten metal from the ladle into the tundish, the packing sand 12 and low-temperature molten metal were disposed of outside the tundish 1 using a discharging device (Japanese Patent Laid-Open No. 11163/1983). 4 and 5, FIG. 4 is a plan view of a conventional gutter-shaped hot water discharging device.

第5図は従来の樋状の捨湯装置の側面図である。図示さ
れるように23は独立支持構造の旋回アームであり、こ
のアーム23の旋回先端部には、排出用M24が載置さ
れ、取り外し可能に取り付けられている。前記アーム2
3は取鍋25及びタンディツシュ1の近傍所定箇所に設
けた支持軸26にその基端部を旋回自在に取付けてあり
、またその中間部に旋回駆動装置を構成するエアシリン
ダー27のロッド先端を連結しである。前記エアシリン
ダー27は、その本体基端部を、前記支持軸26の近傍
所定箇所に回動自在に取付けてあって、切換弁28を介
して供給される圧縮エアーを、前記切換弁28によって
切換えることにより、前記旋回アーム23を旋回させて
、前記排出用樋24を、前記取鍋25の排出装置29の
直下とこれ以外の所定箇所(待機位置、これを図中鎖線
で示す)との間で移動させるようになっている。なお前
記排出用樋24は、低温溶湯に耐える耐火物を内側に施
工してあり、その内側底面を排出容易にするなめに傾斜
させてあって、待機位置においてその補修、交換等が行
えるようになっている。22は捨湯受は容器である。
FIG. 5 is a side view of a conventional gutter-shaped hot water disposal device. As shown in the figure, reference numeral 23 denotes a swinging arm having an independent support structure, and a discharge M24 is placed on the swinging tip of this arm 23, and is removably attached thereto. The arm 2
3 has its base end rotatably attached to a support shaft 26 provided at a predetermined location near the ladle 25 and tundish 1, and the rod tip of an air cylinder 27 constituting a swing drive device is connected to the intermediate part thereof. It is. The air cylinder 27 has its main body base end rotatably attached to a predetermined location near the support shaft 26, and the compressed air supplied via the switching valve 28 is switched by the switching valve 28. By pivoting the swing arm 23, the discharge gutter 24 is moved between the discharge gutter 24 of the ladle 25 directly below the discharge device 29 and a predetermined position other than this (standby position, which is indicated by the chain line in the figure). It is designed to be moved with . The discharge gutter 24 is made of refractory material that can withstand low-temperature molten metal on the inside, and its inner bottom surface is sloped to facilitate discharge, so that repairs, replacements, etc. can be carried out in the standby position. It has become. 22 is a container.

[発明が解決しようとする問題点] しかし、上述したごとく構成された従来の捨湯装置では
、低温溶湯を捨湯受は容器22を処理していたので、溶
湯の歩留が低下したり、さらにタンディツシュlに溶湯
を注入開始前に排出用樋24を清掃や予熱したりするの
で、作業が繁雑であるという問題があった。
[Problems to be Solved by the Invention] However, in the conventional discarding device configured as described above, the low-temperature molten metal is processed in the container 22, which reduces the yield of the molten metal. Furthermore, the discharge gutter 24 must be cleaned and preheated before pouring the molten metal into the tundish l, resulting in a problem that the work is complicated.

この発明は係る事情に鑑みてなされたものであって、溶
湯の歩留の向上と作業の繁雑性を解消することを目的と
する。
This invention has been made in view of the above circumstances, and aims to improve the yield of molten metal and eliminate the complexity of work.

[問題点を解決するための手段〕 この発明に係る水平連続鋳造用タンディツシュは、取鍋
からタンディツシュに溶湯を受湯するタンディツシュの
受湯部とタンディツシュからモールドに溶湯を供給する
鋳込部とを仕切る板状の耐火物製の堰と、前記板状の耐
火物製の堰の底部に受湯部から鋳込部に溶湯を通過させ
る開孔部と、前記開孔部を閉塞し溶湯により溶解する薄
鋼板の閉塞板とからなることを特徴とする。
[Means for Solving the Problems] The tundish for horizontal continuous casting according to the present invention has a receiving part of the tundish that receives molten metal from the ladle into the tundish, and a casting part that supplies the molten metal from the tundish to the mold. A partition made of a plate-shaped refractory weir, an opening at the bottom of the plate-shaped refractory weir that allows the molten metal to pass from the receiving part to the casting part, and a weir that closes the opening and is melted by the molten metal. and a thin steel plate closing plate.

[作用] この発明は係る水平連続鋳造用タンディツシュでは、取
鍋からタンディツシュに溶湯を受湯するタンディツシュ
の受湯部とタンディツシュからモールドに溶湯を供給す
る鋳込部とを仕切る板状の耐火物製の堰と、前記板状の
耐火物製の堰の底部に受湯部から鋳込部に溶湯を通過さ
せる開孔部と、前記開孔部を閉塞し溶湯により溶解する
薄鋼板の閉塞板とからなっているので、注入初期の詰砂
および低温溶湯では開孔部を閉塞し溶湯により溶解する
薄鋼板の閉寒板は溶解されず、その後注入される高温溶
湯によって初めて閉塞板が溶解温度までに上げられて溶
解するので、注入初期の詰砂は鋳込部に混入しない。
[Function] In the tundish for horizontal continuous casting, the present invention includes a plate-shaped refractory material that partitions a tundish receiving section that receives molten metal from a ladle into the tundish and a casting section that supplies molten metal from the tundish to the mold. a weir, an opening at the bottom of the plate-shaped refractory weir for allowing the molten metal to pass from the receiving part to the casting part, and a closing plate made of a thin steel plate that closes the opening and is melted by the molten metal. Therefore, the closed plate of the thin steel plate that closes the opening and melts with the molten metal is not melted by the sand and low-temperature molten metal at the initial stage of injection, and the closed plate does not reach the melting temperature until the high-temperature molten metal that is subsequently injected. Since the sand is lifted up and melted, the sand at the initial stage of pouring does not mix into the casting area.

[実施例〕 以下に添付図面を参照してこの発明の一実施例を詳しく
説明する。第1図はこの発明の一実施例に係る薄鋼板の
閉鎖板の溶解前の水平連続鋳造用タンディツシュの断面
図である。第2図はこの発明の一実施例に係る薄鋼板の
閉鎖板の溶解後の水平連続鋳造用タンディツシュの断面
図である。タンディツシュ1は板状の耐火物製の堰4に
よって3ブロツクに区分され、中央のブロックは取鍋2
5からタンディツシュ1に溶湯を受湯するタンディツシ
ュの受湯部3で、左右のブロックは、溶湯注入孔6を通
してモールド(図示せず)に注入するタンディツシュの
鋳込部2である。板状の耐火物製の堰4の底部にタンデ
ィツシュの受湯部3からタンディツシュの鋳込部2に溶
湯を通過させる開孔部5が設けられている。開孔部5に
は薄鋼板の閉塞板9がはめ込まれて、開孔部5を閉鎖し
ている。次にこの実施例の動作について説明する。取鍋
25の排出装置29を開にするとタンディツシュの受湯
部3に詰砂と溶湯が流出される注入の初期に流出する溶
湯は低温溶湯(例えば1525℃)のため薄鋼板の閉塞
板9はほどんと溶解されないが3〜4秒経過すると高温
溶湯(例えば1580℃)が流出するので、薄鋼板の閉
塞板9が表面が溶解し始める。タンディツシュの受湯部
3の内容積の2/3(15〜20秒)に達すると薄鋼板
の閉塞板9が完全に溶解し、溶湯7が開孔部5を通過し
てタンディツシュの受湯部3からタンディツシュの鋳込
部2に溶湯7が注入される。タンディツシュの受湯部3
には、下部は溶湯7で上部は詰砂と溶滓8になっている
ので、溶湯7が開孔部5を通過してタンディツシュの受
湯部3からタンディツシュの鋳込部2に溶湯7が移動す
る時も、詰砂と溶滓8はタンディツシュの鋳込部2には
混入することはない。
[Embodiment] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view of a tundish for horizontal continuous casting prior to melting of a closure plate of a thin steel plate according to an embodiment of the present invention. FIG. 2 is a sectional view of a tundish for horizontal continuous casting after the closing plate of a thin steel plate is melted according to an embodiment of the present invention. The tandish 1 is divided into three blocks by a plate-shaped refractory weir 4, and the central block has a ladle 2.
In the tundish receiving part 3, which receives molten metal from 5 into the tundish 1, the left and right blocks are the casting part 2 of the tundish, which injects the molten metal into a mold (not shown) through an injection hole 6. An opening 5 is provided at the bottom of the plate-shaped refractory weir 4 to allow the molten metal to pass from the receiving part 3 of the tundish to the casting part 2 of the tundish. A closing plate 9 made of a thin steel plate is fitted into the opening 5 to close the opening 5. Next, the operation of this embodiment will be explained. When the discharge device 29 of the ladle 25 is opened, the packed sand and molten metal flow out into the receiving part 3 of the tundish.The molten metal that flows out at the beginning of pouring is a low temperature molten metal (for example, 1525°C), so the closing plate 9 made of a thin steel plate is Although it is not completely melted, the high temperature molten metal (for example, 1580° C.) flows out after 3 to 4 seconds, and the surface of the thin steel blocking plate 9 begins to melt. When reaching 2/3 (15 to 20 seconds) of the internal volume of the hot water receiving part 3 of the tundish, the closing plate 9 made of a thin steel plate is completely melted, and the molten metal 7 passes through the opening 5 and enters the hot water receiving part of the tundish. 3, the molten metal 7 is poured into the casting part 2 of the tundish. Tanditshu hot water receiving part 3
, the lower part is molten metal 7 and the upper part is packed sand and molten slag 8, so the molten metal 7 passes through the opening 5 and flows from the receiving part 3 of the tundish to the casting part 2 of the tundish. Even during movement, the packed sand and slag 8 do not get mixed into the casting part 2 of the tundish.

本j7j1発明者は薄鋼板の閉塞板の厚さを決める因子
について鋭意研究をかさねた結果、薄鋼板の閉塞板の厚
さ(D)は溶湯温度と溶湯の凝固温度との温度差(ΔT
)と薄鋼板の閉塞板が溶解するまでの時間(1)に関係
することが確認された。なお薄鋼板の閉塞板が溶解する
までの時間(1)はタンディツシュ内の開孔部の上部レ
ベル以下のタンディツシュ内の溶湯量(Ton) /取
鍋からの溶湯流人量(Ton/ 5ec)より計算する
。薄鋼板の閉塞板が溶解するまでの時間(1)はタンデ
ィツシュの形状、大きさ或は取鍋のノズルの内径等によ
り適正値は変化する。
This j7j1 inventor conducted intensive research on the factors that determine the thickness of the closing plate of a thin steel plate, and found that the thickness (D) of the closing plate of a thin steel plate is determined by the temperature difference (ΔT) between the molten metal temperature and the solidification temperature of the molten metal.
) was confirmed to be related to the time required for the thin steel plate to melt (1). The time it takes for the closed plate of the thin steel plate to melt (1) is calculated from the amount of molten metal in the tundish below the upper level of the opening in the tundish (Ton) / the amount of molten metal flowing from the ladle (Ton/5ec). calculate. The appropriate value for the time (1) required for the thin steel plate to melt will vary depending on the shape and size of the tundish, the inner diameter of the nozzle of the ladle, etc.

D=0.02ΔTJt+2〜4 D:薄鋼板の閉塞板の厚さ (See)ΔT:溶湯温度
と溶湯の凝固温度との温度差(’C) t:薄鋼板の閉塞板が溶解するまでの時間(Sec) 
    ’ この発明の一実施例では、薄鋼板の閉塞板9の鋼板の厚
みは9 mmであり、溶湯温度は1600℃であり、凝
固温度は1525℃である。注入開始から薄鋼板の閉塞
板9が溶解するまでの時間は18秒であった。尚18秒
での取鍋からの溶湯量は1000kgである。溶湯歩留
については50tonの取鍋で500kgが回収できる
。即ち1%の歩留向上となる。但しこの薄鋼板の閉塞板
は注入する溶鋼と同じか掻く近似の成分の鋼板を用いる
D=0.02ΔTJt+2~4 D: Thickness of the closing plate of the thin steel plate (See) ΔT: Temperature difference between the molten metal temperature and the solidification temperature of the molten metal ('C) t: Time until the closing plate of the thin steel plate melts (Sec)
' In one embodiment of the present invention, the thickness of the thin steel plate closure plate 9 is 9 mm, the molten metal temperature is 1600°C, and the solidification temperature is 1525°C. The time from the start of injection until the thin steel plate blocking plate 9 melted was 18 seconds. The amount of molten metal from the ladle in 18 seconds is 1000 kg. Regarding the yield of molten metal, 500 kg can be recovered with a 50 ton ladle. In other words, the yield is improved by 1%. However, for this thin steel plate closure plate, a steel plate with the same or similar composition as the molten steel to be injected is used.

[発明の効果コ この発明によれば捨湯をしないので、捨湯場及び捨湯装
置が不用となる。さらに溶湯の歩留がその分向上する。
[Effects of the Invention] According to this invention, there is no need to discard hot water, so a discard pit and a discard device are not required. Furthermore, the yield of molten metal is improved accordingly.

さらに注入開始直前のタンディツシュの加熱と清掃が不
要となり、作業性が著しく向上する。
Furthermore, heating and cleaning of the tundish immediately before starting injection is no longer necessary, significantly improving work efficiency.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例に係る薄鋼板の閉鎖板の溶
解前の水平連続鋳造用タンディツシュの断面図、第2図
はこの発明の一実施例に係る薄鋼板の閉鎖板の溶解後の
水平連続鋳造用タンディツシュの断面図、第3図は従来
の水平連続鋳造用タンディツシュの断面図、第4図は従
来の樋状の捨湯装置の平面図、第5図は従来の樋状の捨
湯装置の側面図である。 1・・・タンディツシュ、2・・・鋳込部、3・・・受
湯部、4・・・耐火物製の堰、5・・・開孔部、6・・
・溶湯注入孔、7・・・溶湯、8・・・溶滓、9・・・
薄鋼板の閉塞板。 特許出願人  日本鋼管株式会社 第1図 第2図
FIG. 1 is a cross-sectional view of a tundish for horizontal continuous casting before the closure plate of a thin steel plate is melted according to an embodiment of the present invention, and FIG. 2 is a sectional view after the closure plate of a thin steel plate is melted according to an embodiment of the present invention. Figure 3 is a cross-sectional view of a conventional horizontal continuous casting tundish, Figure 4 is a plan view of a conventional gutter-shaped tundish, and Figure 5 is a conventional gutter-shaped tundish. FIG. 3 is a side view of the hot water draining device. DESCRIPTION OF SYMBOLS 1... Tanditshu, 2... Casting part, 3... Receiving part, 4... Refractory weir, 5... Opening part, 6...
・Molten metal injection hole, 7... Molten metal, 8... Molten slag, 9...
Occlusion plate made of thin steel plate. Patent applicant: Nippon Kokan Co., Ltd. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims]  水平連続鋳造用タンディッシュにおいて、取鍋からタ
ンディッシュに溶湯を受湯するタンディッシュの受湯部
とタンディッシュからモールドに溶湯を供給する鋳込部
とを仕切る板状の耐火物製の堰と、前記板状の耐火物製
の堰の底部に受湯部から鋳込部に溶湯を通過させる開孔
部と、前記開孔部を閉塞し溶湯により溶解する薄鋼板の
閉塞板とからなることを特徴とする水平連続鋳造用タン
ディッシュ。
In a tundish for horizontal continuous casting, a plate-shaped refractory weir is used to separate a receiving part of the tundish that receives molten metal from the ladle into the tundish and a casting part that supplies molten metal from the tundish to the mold. , consisting of an opening at the bottom of the plate-shaped refractory weir through which the molten metal passes from the receiving part to the casting part, and a closing plate made of a thin steel plate that closes the opening and is melted by the molten metal. A tundish for horizontal continuous casting featuring
JP26587387A 1987-10-21 1987-10-21 Tundish for horizontal continuous casting Pending JPH01107950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26587387A JPH01107950A (en) 1987-10-21 1987-10-21 Tundish for horizontal continuous casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26587387A JPH01107950A (en) 1987-10-21 1987-10-21 Tundish for horizontal continuous casting

Publications (1)

Publication Number Publication Date
JPH01107950A true JPH01107950A (en) 1989-04-25

Family

ID=17423280

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26587387A Pending JPH01107950A (en) 1987-10-21 1987-10-21 Tundish for horizontal continuous casting

Country Status (1)

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JP (1) JPH01107950A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071283A1 (en) * 1999-05-19 2000-11-30 Sms Demag Aktiengesellschaft Device for purifying steel melts
KR100909942B1 (en) * 2007-11-01 2009-08-04 주식회사 포스코 Dam of tundish for non-oxidizing cleansteel molding
EP3753649A1 (en) * 2019-06-21 2020-12-23 Trent Refractories Limited Tundish dam

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130117B2 (en) * 1971-08-03 1976-08-30
JPS5716248B2 (en) * 1973-12-21 1982-04-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5130117B2 (en) * 1971-08-03 1976-08-30
JPS5716248B2 (en) * 1973-12-21 1982-04-03

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071283A1 (en) * 1999-05-19 2000-11-30 Sms Demag Aktiengesellschaft Device for purifying steel melts
KR100909942B1 (en) * 2007-11-01 2009-08-04 주식회사 포스코 Dam of tundish for non-oxidizing cleansteel molding
EP3753649A1 (en) * 2019-06-21 2020-12-23 Trent Refractories Limited Tundish dam

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