JPS62275549A - Belt heating method for belt type continuous caster - Google Patents

Belt heating method for belt type continuous caster

Info

Publication number
JPS62275549A
JPS62275549A JP11494086A JP11494086A JPS62275549A JP S62275549 A JPS62275549 A JP S62275549A JP 11494086 A JP11494086 A JP 11494086A JP 11494086 A JP11494086 A JP 11494086A JP S62275549 A JPS62275549 A JP S62275549A
Authority
JP
Japan
Prior art keywords
belt
metal belt
cooling pad
molten metal
cooling
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
JP11494086A
Other languages
Japanese (ja)
Inventor
Nozomi Tamura
望 田村
Nagayasu Bessho
別所 永康
Yoshihisa Kitano
嘉久 北野
Koichi Tozawa
戸沢 宏一
Tomoaki Kimura
智明 木村
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
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd, Kawasaki Steel Corp filed Critical Hitachi Ltd
Priority to JP11494086A priority Critical patent/JPS62275549A/en
Publication of JPS62275549A publication Critical patent/JPS62275549A/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
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637Accessories therefor
    • B22D11/0665Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0671Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for heating or drying

Abstract

PURPOSE:To prevent the splash of molten metal and the thermal deformation of a metallic belt by heating contacting face of the metallic belt, which shifts circulately without corresponding to a cooling pad wetting by cooling water, with the molten metal by hot blowing air, drying and draining. CONSTITUTION:The molten metal 7 at the metallic belt 4 corresponding to the cooling pad 3 or the metallic belt 4 at the range abutting on the range brought into contact with the solidified shell 6 are heated. For this purpose, flow rate of steam is controlled by a flow rate controlling valve of steam piping as using temp. of water film 5 between the metallic belt 4 and the cooling pad 3 as an index. On the other hand, the molten metal 2 at the metallic belt 4 corresponding to the cooling pad 3 or the metallic belt at contacting range with solidified shell 6 is cooled by the cooling water flowed from supplying holes of the cooling pad 3 or slits 1. In this result, as the splash is prevented, control of the molten metal surface is executed without any hinderances and the cast sheet surface is become to good.

Description

【発明の詳細な説明】 3、発明の詳細な説明 (産業上の利用分野) 本発明は、ベルト式連続鋳造機の金属ベルトを加温し、
スプラッシュを防止し更には、金属ベルトの熱歪を防止
する技術に関するものである。
[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention provides a method for heating a metal belt of a belt-type continuous casting machine,
The present invention relates to a technique for preventing splash and furthermore, preventing thermal distortion of a metal belt.

(従来の技術) ベルト式連続鋳造機の鋳型の長辺面となる金属ベルトの
冷却は、第1図に示すようにベルトの前面に設けた複数
の給水孔1と複数の排水孔2を有する冷却パッド3と金
属ベルト4との間に形成される水膜5によって行われて
いる。この様子を第1図および金属ベルト側からみた冷
却パッドを示す第2図に基き説明する。
(Prior Art) A metal belt, which forms the long side of a mold in a belt-type continuous casting machine, is cooled by using a plurality of water supply holes 1 and a plurality of drainage holes 2 provided on the front surface of the belt, as shown in Fig. 1. This is done by a water film 5 formed between the cooling pad 3 and the metal belt 4. This situation will be explained based on FIG. 1 and FIG. 2, which shows the cooling pad as seen from the metal belt side.

冷却パッド3の幅方向には複数の給水孔1が一列設けら
れ、この給水孔列の下に複数の排水孔2が一列設けられ
、鋳造方向に順次給水孔列と排水孔列が交互に冷却パッ
ド3に設けられている。冷却水は給水孔1より流出し、
排水孔2に流入することにより、金属ベルト4と冷却パ
ッド3との間に水膜5が形成される。この水膜5は、鋳
型内の溶湯7あるいは凝固シェル6より受ける熱で金属
ベルト4が昇温することを抑える冷却能を果している。
A row of multiple water supply holes 1 is provided in the width direction of the cooling pad 3, and a row of multiple drainage holes 2 is provided below this row of water supply holes, and the water supply hole row and the drainage hole row alternately perform cooling in the casting direction. It is provided on the pad 3. Cooling water flows out from water supply hole 1,
By flowing into the drainage hole 2, a water film 5 is formed between the metal belt 4 and the cooling pad 3. This water film 5 has a cooling ability to suppress the metal belt 4 from rising in temperature due to heat received from the molten metal 7 or the solidified shell 6 in the mold.

この冷却能を向上させることにより、溶湯と接触してい
る金属ベルトの温度は溶湯側で200〜250℃となる
が、冷却パッド側では50〜130℃程度となる。
By improving this cooling ability, the temperature of the metal belt in contact with the molten metal becomes 200 to 250°C on the molten metal side, but about 50 to 130°C on the cooling pad side.

(発明が解決しようとする問題点) しかしながら、金属ベルトを冷却する際に、溶湯と接触
する側の金属ベルトが冷却水で濡れることがある。この
濡れた金属ベルトが輸回移動して溶湯と接するとスプラ
ッシュが生じる。このために、場面レベルの制御が困難
となるうえに、スプラッシュに起因する玉地金が薄鋳片
に生じて鋳片の肌荒れの原因となる。更には、冷却バン
ド内に設けられたベルト加熱手段の金属ベルトに与える
熱量が少ない場合、ベルトは充分に加熱されず、溶鋼接
触側と非接触部の温度差により熱歪を生じ鋳造の継続が
困難となる。
(Problems to be Solved by the Invention) However, when cooling the metal belt, the metal belt on the side that comes into contact with the molten metal may become wet with cooling water. When this wet metal belt moves around and comes into contact with the molten metal, splash occurs. For this reason, it becomes difficult to control the scene level, and in addition, the balls caused by the splash are formed on the thin slab, causing roughness of the surface of the slab. Furthermore, if the amount of heat given to the metal belt by the belt heating means installed in the cooling band is small, the belt will not be sufficiently heated and thermal distortion will occur due to the temperature difference between the molten steel contact side and the non-contact area, making it impossible to continue casting. It becomes difficult.

本発明の目的は、水に濡れた金属ベルトを加温すること
によりスプラッシュを防止し更に金属ベルトの冷却バッ
ト内加熱の予熱を行うことにある。
An object of the present invention is to prevent splashing by heating a metal belt wet with water and to preheat the metal belt in a cooling vat.

(問題点を解決するための手段) 前述した問題点を解決するために、輪回移動する金属ベ
ルトの背面に設けられた冷却バンドと対応しない金属ベ
ルトを熱風で加温することにより、金属ベルトが溶湯と
接触する面の水切りを行いスプラッシュの発生を防止し
、かつ、金属ベルトの予熱を行う。
(Means for solving the problem) In order to solve the above-mentioned problem, the metal belt is heated by hot air to heat the metal belt that does not correspond to the cooling band provided on the back side of the metal belt that moves circularly. The surface that comes into contact with the molten metal is drained to prevent splashing, and the metal belt is preheated.

さらに、本発明法を第3図および第4a、 4b図に基
き説明する。。
Further, the method of the present invention will be explained based on FIG. 3 and FIGS. 4a and 4b. .

冷却パッド3と対応する金属ベルト4の溶湯7または凝
固シェル6と接触する領域と隣接する領域(第4a図の
21aおよび21b)の金属ベルト4を加温するために
、蒸気配管2日の流量制御弁29により金属ベルト4と
冷却パッド3間の温度を指標として蒸気の流量を制御す
る。好ましくは開度固定のバルブ30を設けである配管
28aを通った蒸気は、第4b図に示す冷却パッド3の
給水孔あるいはスリット1より、第4a図に示す金属ベ
ルト4の21bに吹き付けられる。また、流量制御弁2
9を設けである配管28bを通った蒸気は、第4b図に
示す冷却パッド3に設けられた蒸気室27に入り、孔あ
るいはスリット24より、第4a図に示すメニスカス上
方に相当する金属ベルト4の21aに吹き付けられ、冷
却パッド3と対応する金属ベルトの溶湯または凝固シェ
ルと接触する領域に隣接する領域の金属ベルトを加温す
る。
In order to heat the metal belt 4 in the area adjacent to the area in contact with the molten metal 7 or the solidified shell 6 of the metal belt 4 corresponding to the cooling pad 3 (21a and 21b in FIG. 4a), the flow rate of the steam pipe 2 is The control valve 29 controls the flow rate of steam using the temperature between the metal belt 4 and the cooling pad 3 as an index. The steam passing through the pipe 28a, which is preferably provided with a valve 30 having a fixed opening, is blown onto the metal belt 4 21b shown in FIG. 4a through the water supply hole or slit 1 of the cooling pad 3 shown in FIG. 4b. In addition, the flow control valve 2
9, the steam passes through the pipe 28b provided in FIG. 4b and enters the steam chamber 27 provided in the cooling pad 3 shown in FIG. 21a, and heats the metal belt in the area adjacent to the area in contact with the cooling pad 3 and the corresponding molten metal or solidified shell of the metal belt.

一方、冷却パッド3に対応する金属ベルトの溶湯または
凝固シェルと接触する領域の金属ベルトは、冷却パッド
3の給水孔またはスリットlより流出する冷却水で冷却
される。
On the other hand, the area of the metal belt that contacts the molten metal or solidified shell of the metal belt corresponding to the cooling pad 3 is cooled by cooling water flowing out from the water supply hole or slit l of the cooling pad 3.

前記金属ベルト4の21aに対応する冷却パッドの孔あ
るいはスリット24より吹き出す蒸気の圧力変動により
、金属ベルトがばたつかないように蒸気の圧力を15k
g/cmtG steem以下にして、ローラーシュー
23により金属ベルト4と冷却パッド3間に空隙を確保
するとよい。しかし、蒸気が金属ベルトを浮上、支持し
得る場合は、ローラーシュー23を省略できる。
Due to the pressure fluctuation of the steam blown out from the hole or slit 24 of the cooling pad corresponding to 21a of the metal belt 4, the pressure of the steam is increased to 15 k to prevent the metal belt from flapping.
g/cmtGsteem or less, and it is preferable to ensure a gap between the metal belt 4 and the cooling pad 3 by the roller shoe 23. However, if the steam can levitate and support the metal belt, the roller shoes 23 can be omitted.

さらに、冷却パッド3と対応しない金属ベルトの加温に
際しては、例えば第3図に示すように熱交換器31等で
加熱された熱風を配管32より、ベルト乾燥・加熱ボッ
クス33に導びき、金属ベルト4を加温する。この際、
ベルト乾燥・加熱ボックス33内での熱風の流速は20
m八以上、熱風の温度は150℃以上、ベルト乾燥・加
熱ボックスバス長さは1m以上とするとよい。
Furthermore, when heating a metal belt that does not correspond to the cooling pad 3, for example, as shown in FIG. Warm the belt 4. On this occasion,
The flow rate of hot air in the belt drying/heating box 33 is 20
The temperature of the hot air should be 150°C or more, and the length of the belt drying/heating box bath should be 1 m or more.

(作 用) 本発明法では、冷却水で濡れた冷却パッドと対応しない
金属ベルトの溶湯と接触する面を乾燥させ水切りを行う
ので、冷却水で濡れた金属ベルトが溶湯と接触する場合
にみられるスプラッシュはなくなる。
(Function) In the method of the present invention, the surface of the metal belt that is not in contact with the molten metal and does not correspond to the cooling pad wetted with cooling water is dried and drained, so that only when the metal belt wetted with cooling water comes into contact with the molten metal, There will be no more splashes.

また、副次的には冷却パッドと対応する金属ベルトの溶
湯または凝固シェルと接触する領域に隣接する領域の金
属ベルトを温水または蒸気で加温するので、溶湯または
凝固シェルと接触している金属ベルトの温度と温水また
は蒸気で加温している金属ベルトの温度との差が小さく
なり、金属ベルトの熱変形は生じなくなる。
Additionally, since the cooling pad and the corresponding metal belt in the area adjacent to the area in contact with the molten metal or solidified shell are heated with hot water or steam, the metal belt in contact with the molten metal or solidified shell is heated with hot water or steam. The difference between the temperature of the belt and the temperature of the metal belt heated with hot water or steam becomes small, and thermal deformation of the metal belt no longer occurs.

(実施例) 第3図に示すベルト式連続鋳造機の金属ベルトとして幅
1500龍、長さ1000龍、厚み1.2flの金属ベ
ルトを使用し、金属ベルトが溶鋼7あるいは凝固シェル
6と接触する領域に隣接する領域の金属ベルトに冷却パ
ッド3より150℃の蒸気を2 m3/分の割合で吹き
付け、第5図に示すように約3秒後、金属ベルトの温度
は140℃になった。一方、パス長2mのベルト乾燥・
加熱ボックス33中に150℃の熱風を20i/分の割
合で送り、第6図に示すように約7秒後、金属ベルトの
温度は140℃になった・ この後、金属ベルトが溶鋼あるいは凝固シェルと接触す
る領域の金属ベルトに冷却パッド3より25℃の冷却水
を流速7m/秒で流出させ、金属ベルトが溶鋼または凝
固シェルと接触する領域に隣接する領域の金属ベルトに
冷却パッドより前記条件の蒸気を吹きつけた。約1秒後
の金属ベルトの温度は、第7図に示すように溶鋼接触面
側で170°C1冷却パツド側で80℃、平均で125
℃のピーク値を記録した。また、金属ベルトが溶鋼また
は凝固シェルと接触する領域に隣接する領域の金属ベル
トの冷却パッド側温度は135℃、金属ベルトの溶鋼側
温度は125℃であり、金属ベルトが溶鋼または凝固シ
ェルと接触する領域の金属ベルトと溶鋼または凝固シェ
ルと接触する領域に隣接する領域の金属ベルトの平均温
度差は、5°C程度となり、減少した。
(Example) A metal belt with a width of 1,500 mm, a length of 1,000 mm, and a thickness of 1.2 fl is used as the metal belt of the belt-type continuous casting machine shown in FIG. 3, and the metal belt contacts the molten steel 7 or the solidified shell 6. Steam at 150°C was sprayed from the cooling pad 3 onto the metal belt in the area adjacent to the area at a rate of 2 m3/min, and the temperature of the metal belt reached 140°C after about 3 seconds as shown in FIG. On the other hand, belt drying with a path length of 2 m
Hot air at 150°C was sent into the heating box 33 at a rate of 20 i/min, and as shown in Figure 6, the temperature of the metal belt reached 140°C after about 7 seconds. After this, the metal belt became molten steel or solidified. Cooling water at a temperature of 25° C. is flowed from the cooling pad 3 at a flow rate of 7 m/sec onto the metal belt in the area in contact with the shell, and the cooling water from the cooling pad 3 is applied to the metal belt in the area adjacent to the area where the metal belt contacts the molten steel or the solidified shell. Steam was blown under the conditions. As shown in Figure 7, the temperature of the metal belt after about 1 second is 170°C on the molten steel contact side, 80°C on the cooling pad side, and 125°C on average.
The peak value in °C was recorded. In addition, the temperature on the cooling pad side of the metal belt in the area adjacent to the area where the metal belt contacts the molten steel or solidified shell is 135°C, the temperature on the molten steel side of the metal belt is 125°C, and the metal belt contacts the molten steel or solidified shell. The average temperature difference between the metal belt in the area where it contacts the molten steel or the solidified shell and the metal belt in the area adjacent to the area where it contacts the molten steel or solidified shell decreased to about 5°C.

また、金属ベルトをベルト乾燥・加熱ボックスで乾燥さ
せ水切りを行っているので、スプラッシュの発生がなく
なった。
Additionally, since the metal belt is dried and drained in a belt drying/heating box, no splash occurs.

(発明の効果) 以上説明したように本発明によれば、スプラッシュを防
止できるので、場面レベルの制御に支障を来すことがな
くなるとともに鋳片肌も良好となる。また、副次的な効
果としては、金属ベルトの熱変形を防止できるので、水
膜の厚みが均一となり、抜熱不良や薄鋳片の形状が悪化
するようなことがなく、金属ベルトの寿命も延びる。
(Effects of the Invention) As explained above, according to the present invention, splash can be prevented, so that there is no problem in controlling the scene level, and the surface of the slab becomes good. In addition, as a secondary effect, thermal deformation of the metal belt can be prevented, so the thickness of the water film becomes uniform, preventing poor heat extraction and deterioration of the shape of the thin slab, and extending the life of the metal belt. It also extends.

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

第1図は冷却パッドの断面図であり、 第2図は冷却バンドを金属ベルト側よりみた図である。 第3図は本発明法を実施するための装置を示す図である
。 第4a図は金属ベルトが溶湯あるいは凝固シェルに接触
する部分を示す図であり、 第4b図は本発明法に用いる冷却バンドの断面図である
。 第5図は金属ベルトを蒸気により加温するときの特性を
示す図であり、 第6図は金属ベルトを熱風により加温するときの特性を
示す図である。 第7図は溶鋼と接触している金属ベルトの温度を示す図
である。 1・・・給水孔またはスリット 2・・・排水孔またはスリット 3・・・冷却パッド    4・・・金属ベルト5・・
・水膜または蒸気  6・・・凝固シェルフ、10・・
・溶湯     9・・・排水ヘッダー10′・・・給
水ヘッダー 14a〜14b・・・ベルト駆動ロール20・・・溶湯
または凝固シェル接触部21a〜21b・・・溶湯また
は凝固シェル非接触部23・・・ローラーシュー 24・・・蒸気供給孔またはスリット 25・・・排水ヘッダー   26・・・給水へ7グー
27 ・・・蒸気室      28.28a、 28
b・・・配管29・・・流量制御弁    30・・・
バルブ31・・・熱交換器     32・・・熱風配
管33・・・ベルト乾燥・加熱ボックス 第1図 第2図 b′富゛d 第4a図      第4b図 第7図 時開(SeC) ぺ゛ルト逼s (’C) ぺ′ルト湯崖(°C)
FIG. 1 is a sectional view of the cooling pad, and FIG. 2 is a view of the cooling band seen from the metal belt side. FIG. 3 is a diagram showing an apparatus for carrying out the method of the present invention. FIG. 4a is a diagram showing the portion where the metal belt contacts the molten metal or solidified shell, and FIG. 4b is a cross-sectional view of the cooling band used in the method of the present invention. FIG. 5 is a diagram showing the characteristics when the metal belt is heated with steam, and FIG. 6 is a diagram showing the characteristics when the metal belt is heated with hot air. FIG. 7 is a diagram showing the temperature of the metal belt in contact with molten steel. 1...Water supply hole or slit 2...Drain hole or slit 3...Cooling pad 4...Metal belt 5...
・Water film or steam 6...Coagulation shelf, 10...
- Molten metal 9... Drain header 10'... Water supply header 14a-14b... Belt drive roll 20... Molten metal or solidified shell contact area 21a-21b... Molten metal or solidified shell non-contact area 23...・Roller shoe 24...Steam supply hole or slit 25...Drain header 26...7 goo to water supply 27...Steam room 28.28a, 28
b...Piping 29...Flow rate control valve 30...
Valve 31...Heat exchanger 32...Hot air piping 33...Belt drying/heating box Fig. 1 Fig. 2 b' Wed Fig. 4a Fig. 4b Fig. 7 Time open (SeC) Page Ruto's ('C) Pe'ruto Yu Cliff (°C)

Claims (1)

【特許請求の範囲】[Claims] 1、輪回移動するベルトの背面に設けられた冷却パッド
と対応しないベルトを熱風で加温するベルト式連続鋳造
機のベルト加温方法。
1. A belt heating method for a belt-type continuous casting machine that uses hot air to heat the belt that does not correspond to the cooling pad provided on the back of the rotating belt.
JP11494086A 1986-05-21 1986-05-21 Belt heating method for belt type continuous caster Pending JPS62275549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11494086A JPS62275549A (en) 1986-05-21 1986-05-21 Belt heating method for belt type continuous caster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11494086A JPS62275549A (en) 1986-05-21 1986-05-21 Belt heating method for belt type continuous caster

Publications (1)

Publication Number Publication Date
JPS62275549A true JPS62275549A (en) 1987-11-30

Family

ID=14650417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11494086A Pending JPS62275549A (en) 1986-05-21 1986-05-21 Belt heating method for belt type continuous caster

Country Status (1)

Country Link
JP (1) JPS62275549A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905753A (en) * 1987-06-08 1990-03-06 Nippon Steel Corporation Twin belt type casting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905753A (en) * 1987-06-08 1990-03-06 Nippon Steel Corporation Twin belt type casting machine

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