JPH01150439A - Twin belt continuous casting machine - Google Patents
Twin belt continuous casting machineInfo
- Publication number
- JPH01150439A JPH01150439A JP30954287A JP30954287A JPH01150439A JP H01150439 A JPH01150439 A JP H01150439A JP 30954287 A JP30954287 A JP 30954287A JP 30954287 A JP30954287 A JP 30954287A JP H01150439 A JPH01150439 A JP H01150439A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- continuous casting
- casting machine
- twin
- pair
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0605—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、１対のベルトおよび短辺側板で囲まれる鋳
造空間をそなえる双ベルト式連続鋳造機に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a twin-belt continuous casting machine having a casting space surrounded by a pair of belts and short side plates.
（従来の技術）
双ベルト式連続鋳造機は、相対するベルトおよび短辺側
板で構成される鋳造空間に溶湯を注ぎ、ベルトの循環と
同期して凝固鋳片を連続的に引き抜くもので、ベルトの
背後にはベルトの冷却および支持に供する冷却パッドを
そなえてなる。(Prior art) A twin-belt continuous casting machine pours molten metal into a casting space made up of opposing belts and short side plates, and continuously pulls out solidified slabs in synchronization with the circulation of the belt. A cooling pad is provided behind the belt to cool and support the belt.
特開昭６１−３７３５５号および同６１−１２９２５９
号各公報には、ベルトと冷却パッドとの間に高王水膜を
形成し、ベルトの冷却および支持をはかることについて
開示されている。JP 61-37355 and JP 61-129259
Each publication discloses forming a high aqua regia film between a belt and a cooling pad to cool and support the belt.
相対する冷却パッドの間隔は上から下まで一定に設定さ
れているが、短辺側板より下方では鋳片側端部に相当す
る位置において冷却パッドとベルト間の水圧が低下する
ため溶鋼静圧によってベルトが冷却パッド側へふくらみ
、ベルトと冷却パッドが接触し、いわゆる水膜切れが生
じる。The spacing between opposing cooling pads is set constant from top to bottom, but below the short side plate, the water pressure between the cooling pad and the belt decreases at a position corresponding to the end of the casting side, so the static pressure of the molten steel causes the belt to The belt swells toward the cooling pad, and the belt and cooling pad come into contact, causing what is called a break in the water film.
水膜切れ現象は、ベルト冷却能低下によるベルト熱変形
を引き起こすのみならず、ベルトや冷却パッドの摩耗お
よび鋳片の割れなどの諸問題の原因となる。The water film breakage phenomenon not only causes thermal deformation of the belt due to a decrease in belt cooling ability, but also causes various problems such as wear of the belt and cooling pad and cracking of the slab.
（発明が解決しようとする問題点）
そこでこの発明は、双ベルト式連続鋳造機における水膜
切れを有利に回避する構造について提案することを目的
とする。(Problems to be Solved by the Invention) Therefore, an object of the present invention is to propose a structure that advantageously avoids water film breakage in a twin-belt continuous casting machine.
（問題点を解決するための手段）
この発明は、一定の距離にわたって溶融金属を保持する
ための間隙を維持しつつ循環する１対の対向配置にかか
るベルトと、これらベルト相互間の両側縁部に位置させ
た１対の短辺側板とで鋳造空間を構成し、ベルトの背後
にベルトの支持および冷却を司る１対の冷却パッドをそ
なえるベルト式連続鋳造機において、冷却パッド間の距
離を少なくとも短辺側板より下方では上部から下部へ漸
増させてなる双ヘルド式連続鋳造機である。(Means for Solving the Problems) The present invention provides a pair of opposing belts that circulate while maintaining a gap for holding molten metal over a certain distance, and a pair of belts that are arranged opposite to each other and that are arranged at both side edges between the belts. In a belt-type continuous casting machine, the casting space is constituted by a pair of short-side side plates located at It is a twin-held continuous casting machine in which the caster is gradually increased from the top to the bottom below the short side plate.
（作 用）
上述したように従来の双ベルト式連続鋳造機における冷
却パッドの間隔は上から下まで一定であるため、第２図
に短辺側板の下方での鋳型断面を示すように、鋳片（ａ
）側端部付近の水膜圧力Ｐ８は溶鋼静圧Ｐｓに比し小さ
くなる。(Function) As mentioned above, the spacing between the cooling pads in a conventional twin-belt continuous casting machine is constant from top to bottom. piece (a
) The water film pressure P8 near the side end is smaller than the molten steel static pressure Ps.
これは水膜（ｂ）を形成する冷却水が矢印（ｃ）方向に
流出するためで、水膜圧力が減少すると第３図に示すよ
うに、ベルｌ−（ｄ）が鋳片（ａ）に生じたバルジング
によって押されて冷却パッド（ｅ）と接触し水膜切れが
生じる。This is because the cooling water that forms the water film (b) flows out in the direction of the arrow (c), and as the water film pressure decreases, the bell l-(d) moves away from the slab (a) as shown in Figure 3. It is pushed by the bulging that occurs in the cooling pad (e) and comes into contact with the cooling pad (e), causing a break in the water film.
−たび第３図のように変形すると、その形状で鋳片の凝
固が進行するため、鋳型通過時は常に膜切れ状態となる
。- When the slab is deformed as shown in Fig. 3, solidification of the slab progresses in that shape, so the film always breaks when passing through the mold.
水膜切れが発生するとベルトが摩耗するほか、鋳片に縦
割れが生じる不利がある。すなわち水膜切れによってベ
ルトと冷却パッドとが接触すると、鋳片は幅方向に収縮
しようとしてもベルトと鋳片と冷却パッドが接触して一
体化しているため鋳片の両側に拘束力が働き結果的に鋳
片の幅方向に引張り応力が働くため、縦割れが発生する
。When water film breakage occurs, the belt wears out, and the cast slab has the disadvantage of vertical cracking. In other words, when the belt and cooling pad come into contact due to water film breakage, even if the slab tries to shrink in the width direction, the belt, slab, and cooling pad contact each other and are integrated, so a restraining force acts on both sides of the slab. Because tensile stress acts in the width direction of the slab, vertical cracks occur.
そこでこの発明は、少なくとも短辺側板より下方の冷却
パッド間隔を徐々に広げて膜切れの発生を防止する。バ
ルジングの量は溶鋼静圧に比例して増加するが、冷却パ
ッド間隔を徐々に広くしたことによってベルトが冷却パ
ッドと接触するまで押されることはなく、膜切れは発生
しない。Therefore, the present invention gradually widens the interval between the cooling pads at least below the short side plate to prevent the occurrence of film breakage. The amount of bulging increases in proportion to the static pressure of the molten steel, but by gradually widening the distance between the cooling pads, the belt is not pushed until it comes into contact with the cooling pads, and film breakage does not occur.
（実施例）
第１図に、この発明に従う双ベルト式連続鋳造機を示す
。(Example) FIG. 1 shows a twin-belt continuous casting machine according to the present invention.
図示の双ベルト式連続鋳造機は、所定の距離にわたって
鋳造金属（溶融金属やその凝固シェル等の鋳造材料）を
保持するための間隙を維持しつつ、それぞれ複数個のガ
イドロール３ａ、 ３ｂ、 ３ｃを介して軸回移動する
対向配置とした１対の長辺面を支持する金属製のベルト
１．２と、それら両ベルト相互間にあって各々の側縁近
傍で緊密に接している短辺面を支持するための上広下す
ぼまり状の短辺側板４．５とで４方を限局して鋳造空間
とするしくみになっている。The illustrated twin-belt continuous casting machine has a plurality of guide rolls 3a, 3b, and 3c, respectively, while maintaining a gap for holding the cast metal (cast material such as molten metal or its solidified shell) over a predetermined distance. A metal belt 1.2 supporting a pair of long side surfaces arranged opposite to each other and moving axially through the metal belt 1.2, and a short side surface that is in close contact near each side edge between the two belts. A casting space is formed by confining the casting space on four sides with upper and lower concave short side plates 4.5 for support.
該鋳造空間に浸漬ノズル６から溶融金属を給湯すると、
ヘルド１，２の背後にそれぞれ配した１対の冷却パッド
７ａ、 ７ｂによって冷却されたベルト１．２に接触し
た溶融金属は凝固殻を形成しながら下方に引き抜かれる
。When molten metal is supplied into the casting space from the immersion nozzle 6,
The molten metal that comes into contact with the belt 1.2 is cooled by a pair of cooling pads 7a and 7b arranged behind the healds 1 and 2, respectively, and is drawn downward while forming a solidified shell.
冷却パッド７ａ、 ７ｂは、その間隔が上から下へ漸増
するように配し、具体的には短辺下端に対応する位置で
の間隔ｔ。とガイドロール３ｃに対応する位置（Ｂ）で
の間隔１．との差（ｔ＋−ｔｏ）が鋳型長３．８ｍのと
きに０．１〜１．０ｍｍの範囲になる、上から下へ広が
るテーパを設けてなる。The cooling pads 7a, 7b are arranged so that the distance between them gradually increases from top to bottom, specifically, the distance t at the position corresponding to the lower end of the short side. and the distance at the position (B) corresponding to the guide roll 3c: 1. The difference (t+-to) is in the range of 0.1 to 1.0 mm when the mold length is 3.8 m, and a taper is provided that widens from the top to the bottom.
（ｔ＋ ｔｏ）が０．１Ｍ未満になると水膜切れが発
生し、また１、０ｍｍをこえると水膜の冷却能が低下し
て熱変形が生じるため、０．１〜１．０ｍｍの範囲が好
適である。If (t+to) is less than 0.1M, the water film breaks, and if it exceeds 1.0mm, the cooling ability of the water film decreases and thermal deformation occurs, so the range of 0.1 to 1.0mm is suitable.
次に、この発明に従う双ベルト式連続鋳造機を用いた連
続鋳造について、具体的に説明する。Next, continuous casting using the twin-belt continuous casting machine according to the present invention will be specifically explained.
下記の諸元になる双ヘルド式連続鋳造機にて、１６０Ｌ
の低炭アルミキルド鋼を鋳造速度１５ｍ／ｍｉｎで厚さ
３０胴、幅１０００ｍｍの鋳片に鋳造したところ、ベル
トの摩耗もなく、得られた鋳片に縦割れは全くみられな
かった。160L using a twin-held continuous casting machine with the following specifications.
When this low carbon aluminum killed steel was cast into a slab with a thickness of 30 mm and a width of 1000 mm at a casting speed of 15 m/min, there was no belt wear and no vertical cracks were observed in the resulting slab.
記
ベルト厚＝１．２〜１．６ｍｍ
鋳型長（メニスカス−下ロール）：３．８ｍベルト−冷
却パッド間隔：０．５ｍｍ
冷却パッド間隔ｔｏ ： ３０．Ｏｍｍｔ＋ ：
３０．４ｍｍ
Ｌ ｔｏ ： ０．４ ｍｍ
冷却水圧： ０．７〜２．５ ｋｇ／ｃｍ２（発明の効
果）
この発明によれば、膜切れの発生を防ぐことができ、し
たがってベルト摩耗の抑制および鋳片の縮割れの防止を
それぞれ実現し得る。Belt thickness = 1.2 to 1.6 mm Mold length (meniscus - lower roll): 3.8 m Belt - cooling pad interval: 0.5 mm Cooling pad interval to: 30. Ommt+:
30.4 mm L to: 0.4 mm Cooling water pressure: 0.7 to 2.5 kg/cm2 (Effects of the invention) According to the invention, it is possible to prevent the occurrence of membrane breakage, thereby suppressing belt wear and It is possible to prevent shrinkage cracking of slabs.
第１図はこの発明に従う双ベルト式連続鋳造機の説明図
、
第２図はベルト表裏での圧力分布を示す説明図、第３図
は水膜切れを示す断面図である。FIG. 1 is an explanatory diagram of a twin-belt continuous casting machine according to the present invention, FIG. 2 is an explanatory diagram showing the pressure distribution on the front and back sides of the belt, and FIG. 3 is a sectional view showing water film breakage.
Claims (1)
隙を維持しつつ循環する１対の対向配置にかかるベルト
と、これらベルト相互間の両側縁部に位置させた１対の
短辺側板とで鋳造空間を構成し、ベルトの背後にベルト
の支持および冷却を司る１対の冷却パッドをそなえるベ
ルト式連続鋳造機において、 冷却パッド間の距離を少なくとも短辺側板 より下方では上部から下部へ漸増させてなる双ベルト式
連続鋳造機。[Claims] 1. A pair of opposing belts that circulate while maintaining a gap for holding molten metal over a certain distance, and a pair of belts located on both side edges between these belts. In a belt-type continuous casting machine, the casting space is formed by the short-side side plates of the belt, and a pair of cooling pads are provided behind the belt to support and cool the belt. A twin-belt continuous casting machine that gradually increases from the top to the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30954287A JPH01150439A (en) | 1987-12-09 | 1987-12-09 | Twin belt continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30954287A JPH01150439A (en) | 1987-12-09 | 1987-12-09 | Twin belt continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150439A true JPH01150439A (en) | 1989-06-13 |
| JPH0523863B2 JPH0523863B2 (en) | 1993-04-06 |
Family
ID=17994270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30954287A Granted JPH01150439A (en) | 1987-12-09 | 1987-12-09 | Twin belt continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01150439A (en) |
-
1987
- 1987-12-09 JP JP30954287A patent/JPH01150439A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0523863B2 (en) | 1993-04-06 |
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