JP4728494B2 - Facilities for continuous annealing and hot dipping - Google Patents

Facilities for continuous annealing and hot dipping Download PDF

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Publication number
JP4728494B2
JP4728494B2 JP2001069574A JP2001069574A JP4728494B2 JP 4728494 B2 JP4728494 B2 JP 4728494B2 JP 2001069574 A JP2001069574 A JP 2001069574A JP 2001069574 A JP2001069574 A JP 2001069574A JP 4728494 B2 JP4728494 B2 JP 4728494B2
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Prior art keywords
continuous annealing
annealing furnace
steel plate
plating
facility
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JP2002275546A (en
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正則 星野
資文 武村
伸義 岡田
弘一 寺原
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Nippon Steel Corp
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Nippon Steel Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、鋼板の連続焼鈍と溶融メッキを、同一の設備で切り替えて行う連続焼鈍および溶融メッキ兼用設備に関するものである。
【０００２】
【従来の技術】
鋼板の連続焼鈍材と溶融メッキ材は別々の設備で製造されるのがこれまで一般的であった。すなわち、連続焼鈍材は連続焼鈍炉を出た鋼板をウオータークエンチ装置により冷却して製造され、溶融メッキ材は連続焼鈍炉を出た鋼板を、メッキポットおよびメッキ装置に通板して製造されていた。
一方、これらを同一の設備で製造するための連続焼鈍および溶融メッキ兼用設備が特開昭５５−６４６９号公報および特開平１１−５２９８号公報により知られている。
【０００３】
上記特開昭５５−６４６９号公報に示されている設備は、連続焼鈍材を製造するとき、連続焼鈍炉から出た鋼板をメッキポットに漬けることなく、大気中にて冷却するものである。しかし、連続焼鈍炉から出たばかりの鋼板は温度が高いため、そのままでは鋼板表面が酸化するという問題がある。この酸化膜をとるためには酸洗が必要となり、酸洗装置を設けることによる設備投資額の増大、酸洗廃液処理のための設備や操業負荷の増大といった問題がある。
【０００４】
また上記特開平１１−５２９８号公報に示されているのは、連続焼鈍炉から出た鋼板が大気中で酸化しないよう、連続焼鈍炉出側の鋼板温度を十分低くする設備である。しかし、大気に触れても酸化しない程度まで鋼板を冷却するためには、連続焼鈍炉内における冷却設備の増設が必要であり、そのための設備投資額が増大する。
【０００５】
本発明者らはこの問題を解決した連続焼鈍および溶融メッキ兼用設備を開発し、特願２０００−２７８５６６により出願している。すなわち、連続焼鈍炉を出た鋼板を、メッキ設備を通さずに直接ウオータークエンチ装置へ導くバイパス装置を設け、該バイパス装置内を非酸化性雰囲気に保つことで、設備コストの大幅な増大なしに鋼板の酸化を防止する技術である。
【０００６】
【発明が解決しようとする課題】
本発明者らが開発した上記出願の技術による連続焼鈍および溶融メッキ兼用設備では、連続焼鈍炉を出た鋼板が表面酸化せず、良好な連続焼鈍材および溶融メッキ材が得られる。しかし、連続焼鈍材の製造から溶融メッキ材の製造へ、あるいは溶融メッキ材の製造から連続焼鈍材の製造へ切り替えたとき、切替後の特に初期において、連続焼鈍材にはブルーイング、溶融メッキ材にはメッキ不良といった鋼板表面酸化による製品不良が発生するので、安定化のために時間を要するなど、切替時の問題が残されていた。
【０００７】
そこで本発明が解決しようとする課題は、鋼板の連続焼鈍と溶融メッキを同一の設備で切り替えて行う連続焼鈍および溶融メッキ兼用設備において、切替後の特に初期に発生するブルーイングやメッキ不良など鋼板表面酸化による製品不良をなくすことである。
【０００８】
【課題を解決するための手段】
上記課題を解決するための本発明は、鋼板の流れ方向に沿って、少なくとも連続焼鈍炉、メッキポットおよびメッキ装置、ウォータークエンチ装置が配置されたラインに、鋼板を大気に触れることなく連続焼鈍炉からウオータークエンチ装置へ直接導くバイパス装置を設け、該バイパス装置の内部は非酸化性雰囲気に保ち、鋼板の連続焼鈍と溶融メッキを切り替えて行う設備において、連続焼鈍炉の出側およびウオータークエンチ装置の入側にシール機構を設け、切替作業時に連続焼鈍炉内への外気の侵入、およびバイパス装置内へのウオータークエンチ装置からの水蒸気の侵入を防止することを特徴とする連続焼鈍および溶融メッキ兼用設備である。
【０００９】
そして上記本発明設備において、連続焼鈍炉の出側に設けたシール機構を構成するシール装置のうち少なくとも１つは非接触シールであるのが好ましい。また、ウオータークエンチ装置の入側に設けたシール機構が複数のシール装置からなり、該複数のシール装置の間から雰囲気を吸い出す排気ファンが設けてあるのが好ましい。
【００１０】
【発明の実施の形態】
本発明設備は、図１に例示するような、鋼板１の流れ方向に沿って、少なくとも連続焼鈍炉２、メッキポット３およびメッキ装置４、ウォータークエンチ装置７が配置されたラインに、バイパス装置８を設けた連続焼鈍および溶融メッキ兼用設備を対象とする。バイパス装置８は、鋼板１を大気に触れることなく連続焼鈍炉２からウオータークエンチ装置７へ直接導くものであり、バイパス装置８の内部は非酸化性雰囲気に保たれている。
【００１１】
本発明設備は、このような連続焼鈍および溶融メッキ兼用設備において、図１の例のように、連続焼鈍炉２の出側にシール機構１０を設け、かつウオータークエンチ装置７の入側にシール機構１１を設けたことを特徴とする。ウオータークエンチ装置７入側のシール機構１１は、図１のように入側ロール１６の出側に設けるほか、図２のように入側ロール１６の入側に、あるいは入側ロール１６を挟んで両側に設けることもできる。
【００１２】
図１の設備において溶融メッキ材を製造するには、連続焼鈍炉２で焼鈍された鋼板１を、破線で示すようにメッキポット３に導入してメッキし、メッキ装置４によりメッキ付着量を調整したのち、必要に応じて合金化炉５で合金化処理を行い、鋼板冷却装置６で冷却し、ウオータークエンチ装置７により略常温まで冷却する。このとき、バイパス装置８に設けた切替装置１４は鉛直方向通板用にしてある。
【００１３】
連続焼鈍材を製造するには、連続焼鈍炉２で焼鈍された鋼板１を、実線で示すようにバイパス装置８を通してウオータークエンチ装置７へ直接導入し、略常温まで冷却する。このとき、切替装置１４は水平方向通板用にしてある。バイパス装置８内は、非酸化性雰囲気たとえば連続焼鈍装置炉２内と同雰囲気の５〜１０％Ｈ2−９５〜９０％Ｎ2に保たれているため、鋼板１は表面酸化することなくウオータークエンチ装置７まで到達して冷却される。
【００１４】
また、バイパス装置８の下部にクレーン９を設置することにより、メッキポット３、メッキ装置４、あるいはメッキポット3内の設置機器の搬入および搬出を容易にし、連続焼鈍材を製造しているときにこれら装置や機器の保守、点検、修繕を行うことが可能となり、生産効率の向上がはかられる。
【００１５】
図１の例において、溶融メッキ材の製造から連続焼鈍材の製造に切り替えるには、連続焼鈍炉２とベンディングロール１５との間の、たとえばａ点で鋼板１を切断し、メッキポット３内の鋼板を切替装置１４の上方まで、たとえばｂ点まで引き上げる。またウオータークエンチ装置７の入側ロール１６の上方、たとえばｃ点で鋼板を切断する。
【００１６】
そして切替装置１４を水平方向通板用に切り替え、ピンチロール１２により連続焼鈍炉２から鋼板１を引き出しつつ、その先端をベンディングロール１５から上に向かわせ、バイパス装置８を経て入側ロール１６までスレッディングして、ウオータークエンチ装置７内の鋼板に接続する。なお、ウオータークエンチ装置７から鋼板を引き出してもスレッディングは可能であるが、ウオータークエンチ装置７の水分がバイパス装置８に持ちこまれるので、バイパス装置８内を非酸化性雰囲気にするのが困難となる。
【００１７】
連続焼鈍材の製造から溶融メッキ材の製造に切り替えるには、ａ点で鋼板１を切断してバイパス装置８内の鋼板をウオータークエンチ装置７の入側ロール１６まで引き出し、上方に残されている鋼板に接続する。そして切替装置１４を鉛直方向通板用に切り替え、ピンチロール１２により連続焼鈍炉２から鋼板１を引き出しつつ、その先端をピンチロール１３によりメッキポット３へ導入し、メッキ装置４を経て切替装置１４の上までスレッディングし、ｂ点にて上方に残されている鋼板に接続する。
【００１８】
本発明者らが前記課題解決について検討した結果、このような切替後の初期に発生する鋼板表面酸化の原因は、切替作業の際、連続焼鈍炉２内に外気が侵入すること、およびバイパス装置８内にウオータークエンチ装置７から水蒸気が侵入することに起因していた。
【００１９】
そこで本発明設備は、図１の例のように連続焼鈍炉２の出側にシール機構１０を設け、かつウオータークエンチ装置７の入側にシール機構１１を設けた。前者により切替作業中における連続焼鈍炉２内への外気侵入が防止され、後者により切替作業中におけるバイパス装置８内への水蒸気侵入が防止され、切替後の初期においても、鋼板表面酸化によるブルーイングやメッキ不良といった製品不良発生の問題が解決された。
【００２０】
連続焼鈍炉２の出側に設けたシール機構１０には、図３に示すラビリンスシール１７のような非接触シールを採用するのが好ましい。本例ではラビリンスシール１７とダンパーシール１８を並設しているが、このようにシール装置のうち少なくとも１つは非接触シールとするのが好ましい。非接触シールとしては、このほかガスカーテンなども採用できる。非接触シールにより、スレッディングを行うとき良好なシール状態を維持した状態で連続焼鈍炉２から鋼板１を容易に引き出すことができる。切替作業が完了し鋼板のパスラインが外気と遮断されたのちは、シール機構１０は開放してよい。
【００２１】
ウオータークエンチ装置７の入側に設けたシール機構１１は、図４の例のように、複数のシール装置、本例ではダンパーシール１８およびダンパーシール１８とシールロール１９の組み合わせからなり、これら複数のシール装置の間から雰囲気を吸い出す排気ファン２０を設置するのが好ましい。
本例では入側ロール１６を挟んで両側にシール機構１１を設け、合計５段のシール装置としているが、入側ロール１６の片側だけでもよい。
【００２２】
ウオータークエンチ装置７から上がってくる水蒸気は、ダンパーシール１８やシールロール１９の鋼板パスラインと反対側を通ってバイパス装置８に侵入することもある。このため排気ファン２０に吸引管２１を接続し、吸引口２２を各シール装置の間に臨ませ、上記反対側の水蒸気を吸引して排出することで、より効果的にバイパス装置８への水蒸気侵入を防止し、連続焼鈍材の製品不良発生を抑制する。
このシール機構１１は、切替作業中のほか連続焼鈍材の通板中もシールを効かせ、水蒸気がバイパス装置８に侵入するのを防止する。
【００２３】
【発明の効果】
本発明により、鋼板の連続焼鈍と溶融メッキを同一の設備で切り替えて行う連続焼鈍および溶融メッキ兼用設備において、切替後の特に初期のブルーイングやメッキ不良など鋼板表面酸化による製品不良の発生が抑制され、切替作業も容易となる。このため、従来は切替後に安定化するまで時間を要していたのが不要となり、切替時間が短縮される。したがって、溶融メッキ材および連続焼鈍材の製品製造歩留まりが向上するとともに、生産性も向上する。
【図面の簡単な説明】
【図１】本発明設備の例を示す説明図である。
【図２】本発明設備の別の例を示す説明図である。
【図３】本発明設備におけるシール機構の例を示す説明図である。
【図４】本発明設備におけるシール機構の別の例を示す説明図である。
【符号の説明】
１…鋼板 ２…連続焼鈍炉
３…メッキポット ４…メッキ装置
５…合金化炉 ６…鋼板冷却装置
７…ウオータークエンチ装置 ８…バイパス装置
９…クレーン １０，１１…シール機構
１２，１３…ピンチロール １４…切替装置
１５…ベンディングロール １６…入側ロール
１７…ラビリンスシール １８…ダンパーシール
１９…シールロール ２０…排気ファン
２１…吸引管 ２２…吸引口[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to continuous annealing and hot dipping combined equipment in which continuous annealing and hot dipping of steel sheets are switched by the same equipment.
[0002]
[Prior art]
In the past, it was common that the continuous annealing material and the hot dip plating material of a steel plate were manufactured in separate facilities. That is, the continuous annealing material is manufactured by cooling the steel plate that has exited the continuous annealing furnace with a water quench device, and the hot-dip plating material is manufactured by passing the steel plate that has exited the continuous annealing furnace through a plating pot and a plating apparatus. It was.
On the other hand, continuous annealing and hot dipping facilities for manufacturing these with the same equipment are known from Japanese Patent Laid-Open Nos. 55-6469 and 11-5298.
[0003]
The equipment disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 55-6469 is for cooling in the atmosphere without producing a steel plate from a continuous annealing furnace in a plating pot when producing a continuous annealing material. However, since the temperature of the steel plate just taken out from the continuous annealing furnace is high, there is a problem that the surface of the steel plate is oxidized as it is. In order to take this oxide film, pickling is required, and there are problems such as an increase in the amount of capital investment due to the provision of a pickling apparatus, and an increase in equipment and operation load for treating the pickling waste liquid.
[0004]
Moreover, what is shown by the said Unexamined-Japanese-Patent No. 11-5298 is an installation which makes the steel plate temperature of the continuous annealing furnace exit side low enough so that the steel plate taken out from the continuous annealing furnace may not oxidize in air | atmosphere. However, in order to cool the steel plate to such an extent that it does not oxidize even if it is exposed to the atmosphere, it is necessary to add cooling equipment in the continuous annealing furnace, which increases the amount of capital investment for that purpose.
[0005]
The present inventors have developed a facility for continuous annealing and hot dipping that solves this problem, and has filed a patent application in Japanese Patent Application No. 2000-278666. In other words, by providing a bypass device that guides the steel plate that has exited the continuous annealing furnace directly to the water quench device without passing through the plating facility, and maintaining the inside of the bypass device in a non-oxidizing atmosphere, there is no significant increase in facility costs. This technology prevents oxidation of steel sheets.
[0006]
[Problems to be solved by the invention]
In the continuous annealing and hot dip plating equipment developed by the present inventors using the technique of the above-mentioned application, the steel sheet exiting the continuous annealing furnace does not undergo surface oxidation, and a good continuous annealing material and hot dip plating material can be obtained. However, when switching from continuous annealing material production to hot dipping material production, or from hot dipping material production to continuous annealing material production, especially in the initial stage after switching, continuous annealing material is bluing, hot dipping material. In this case, a defective product due to oxidation of the steel plate surface such as defective plating occurs, so that there are problems at the time of switching such as taking time for stabilization.
[0007]
Therefore, the problem to be solved by the present invention is that steel sheets such as bluing and plating defects that occur particularly in the initial stage after switching in a facility for continuous annealing and hot dipping that are performed by switching between continuous annealing and hot dipping of a steel sheet using the same equipment. It is to eliminate product defects due to surface oxidation.
[0008]
[Means for Solving the Problems]
The present invention for solving the above-mentioned problems is directed to a continuous annealing furnace without touching the steel sheet to the atmosphere in a line in which at least a continuous annealing furnace, a plating pot and a plating device, and a water quench device are arranged along the flow direction of the steel plate. a bypass device for guiding directly to the water quench apparatus from provided, the interior of the bypass apparatus Chi coercive in a non-oxidizing atmosphere, in performing switching the continuous annealing and hot dip steel plate equipment, continuous annealing furnace outlet side and a water quench apparatus For continuous annealing and hot dipping, characterized by providing a sealing mechanism on the inlet side of the furnace and preventing intrusion of outside air into the continuous annealing furnace and water vapor from the water quench device into the bypass device during switching operations Equipment.
[0009]
In the equipment of the present invention, at least one of the sealing devices constituting the sealing mechanism provided on the outlet side of the continuous annealing furnace is preferably a non-contact seal. In addition, it is preferable that the sealing mechanism provided on the inlet side of the water quench device includes a plurality of sealing devices, and an exhaust fan that sucks out the atmosphere from among the plurality of sealing devices is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the facility of the present invention has a bypass device 8 in a line in which at least the continuous annealing furnace 2, the plating pot 3 and the plating device 4, and the water quench device 7 are arranged along the flow direction of the steel plate 1. For continuous annealing and hot dipping facilities. The bypass device 8 leads the steel plate 1 directly from the continuous annealing furnace 2 to the water quench device 7 without touching the atmosphere, and the inside of the bypass device 8 is maintained in a non-oxidizing atmosphere.
[0011]
In the facility of the present invention, in such a facility for continuous annealing and hot dipping, a sealing mechanism 10 is provided on the exit side of the continuous annealing furnace 2 as shown in the example of FIG. 11 is provided. As shown in FIG. 1, the seal mechanism 11 on the inlet side of the water quench device 7 is provided on the outlet side of the inlet roll 16, and on the inlet side of the inlet roll 16 as shown in FIG. It can also be provided on both sides.
[0012]
In order to manufacture the hot-dip plating material in the facility of FIG. 1, the steel plate 1 annealed in the continuous annealing furnace 2 is introduced into the plating pot 3 as shown by the broken line and plated, and the plating adhesion amount is adjusted by the plating apparatus 4. Then, if necessary, alloying treatment is performed in the alloying furnace 5, the steel plate cooling device 6 is cooled, and the water quenching device 7 is cooled to substantially room temperature. At this time, the switching device 14 provided in the bypass device 8 is used for vertical plate passing.
[0013]
In order to manufacture the continuous annealing material, the steel plate 1 annealed in the continuous annealing furnace 2 is directly introduced into the water quench device 7 through the bypass device 8 as shown by a solid line, and is cooled to substantially normal temperature. At this time, the switching device 14 is used for horizontal plate passing. Since the inside of the bypass device 8 is maintained in a non-oxidizing atmosphere, for example, 5 to 10% H 2 -95 to 90% N 2 in the same atmosphere as the inside of the continuous annealing apparatus furnace 2, the steel sheet 1 is water without surface oxidation. It reaches the quench device 7 and is cooled.
[0014]
In addition, by installing the crane 9 below the bypass device 8, the plating pot 3, the plating device 4, or the installed equipment in the plating pot 3 can be easily carried in and out, and the continuous annealing material is manufactured. Maintenance, inspection, and repair of these devices and equipment can be performed, and production efficiency can be improved.
[0015]
In the example of FIG. 1, in order to switch from the production of the hot-dip plating material to the production of the continuous annealing material, the steel plate 1 is cut between the continuous annealing furnace 2 and the bending roll 15, for example, at point a, The steel plate is pulled up to above the switching device 14, for example, to point b. Further, the steel plate is cut above the entrance roll 16 of the water quench device 7, for example, at point c.
[0016]
Then, the switching device 14 is switched to horizontal plate passing, and the tip 1 is directed upward from the bending roll 15 while the steel plate 1 is pulled out from the continuous annealing furnace 2 by the pinch roll 12, to the entrance side roll 16 through the bypass device 8. Threading and connecting to the steel plate in the water quench device 7. Although threading is possible even if the steel plate is pulled out from the water quench device 7, moisture in the water quench device 7 is brought into the bypass device 8, so that it becomes difficult to make the inside of the bypass device 8 into a non-oxidizing atmosphere. .
[0017]
In order to switch from the production of the continuously annealed material to the production of the hot dipped material, the steel plate 1 is cut at the point a and the steel plate in the bypass device 8 is pulled out to the entrance roll 16 of the water quench device 7 and left above. Connect to steel plate. Then, the switching device 14 is switched to vertical plate passing, the steel plate 1 is pulled out from the continuous annealing furnace 2 by the pinch roll 12, and the tip is introduced into the plating pot 3 by the pinch roll 13, and the switching device 14 is passed through the plating device 4. Is connected to the steel plate left above at the point b.
[0018]
As a result of the study of the problem solving by the present inventors, the cause of the steel plate surface oxidation occurring at the initial stage after switching is that the outside air enters the continuous annealing furnace 2 during the switching operation, and the bypass device. This was because water vapor entered the water quencher 7 into the water 8.
[0019]
Therefore, the equipment of the present invention is provided with the seal mechanism 10 on the exit side of the continuous annealing furnace 2 and the seal mechanism 11 on the entry side of the water quench apparatus 7 as in the example of FIG. The former prevents intrusion of outside air into the continuous annealing furnace 2 during the switching operation, and the latter prevents water vapor from entering into the bypass device 8 during the switching operation. The problem of product defects such as plating and defective plating was solved.
[0020]
It is preferable to employ a non-contact seal such as a labyrinth seal 17 shown in FIG. 3 for the seal mechanism 10 provided on the outlet side of the continuous annealing furnace 2. In this example, the labyrinth seal 17 and the damper seal 18 are provided side by side, but it is preferable that at least one of the sealing devices be a non-contact seal. In addition to this, a gas curtain or the like can be used as the non-contact seal. With the non-contact seal, the steel plate 1 can be easily pulled out from the continuous annealing furnace 2 while maintaining a good seal state when threading. After the switching operation is completed and the steel plate pass line is shut off from the outside air, the sealing mechanism 10 may be opened.
[0021]
As shown in the example of FIG. 4, the seal mechanism 11 provided on the entrance side of the water quench device 7 includes a plurality of seal devices, in this example, a damper seal 18 and a combination of the damper seal 18 and a seal roll 19. It is preferable to install an exhaust fan 20 that sucks out the atmosphere from between the sealing devices.
In this example, the seal mechanism 11 is provided on both sides of the entry side roll 16 to provide a total of five stages of the sealing device, but only one side of the entry side roll 16 may be provided.
[0022]
The water vapor rising from the water quench device 7 may enter the bypass device 8 through the side opposite to the steel plate pass line of the damper seal 18 or the seal roll 19. For this reason, the suction pipe 21 is connected to the exhaust fan 20, the suction port 22 faces between the respective sealing devices, and the water vapor on the opposite side is sucked and discharged, so that the water vapor to the bypass device 8 can be more effectively discharged. Prevents intrusion and suppresses product defects in continuously annealed materials.
This sealing mechanism 11 prevents the water vapor from entering the bypass device 8 by effecting the sealing during the switching operation and also during the passing of the continuous annealing material.
[0023]
【The invention's effect】
The present invention suppresses the occurrence of product defects due to steel plate surface oxidation, such as initial bluing and plating defects after switching, in continuous annealing and hot dipping plating equipment in which continuous annealing and hot dipping of steel sheets are switched using the same equipment. In addition, switching work is also facilitated. For this reason, conventionally, it is unnecessary to take time to stabilize after switching, and the switching time is shortened. Therefore, the product manufacturing yield of the hot dipped material and the continuous annealing material is improved, and the productivity is also improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an example of the facility of the present invention.
FIG. 2 is an explanatory view showing another example of the facility of the present invention.
FIG. 3 is an explanatory view showing an example of a sealing mechanism in the facility of the present invention.
FIG. 4 is an explanatory view showing another example of a sealing mechanism in the facility of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Steel plate 2 ... Continuous annealing furnace 3 ... Plating pot 4 ... Plating apparatus 5 ... Alloying furnace 6 ... Steel plate cooling apparatus 7 ... Water quench apparatus 8 ... Bypass apparatus 9 ... Crane 10, 11 ... Sealing mechanism 12, 13 ... Pinch roll DESCRIPTION OF SYMBOLS 14 ... Switching apparatus 15 ... Bending roll 16 ... Entrance side roll 17 ... Labyrinth seal 18 ... Damper seal 19 ... Seal roll 20 ... Exhaust fan 21 ... Suction pipe 22 ... Suction port

Claims (3)

鋼板の流れ方向に沿って、少なくとも連続焼鈍炉、メッキポットおよびメッキ装置、ウォータークエンチ装置が配置されたラインに、鋼板を大気に触れることなく連続焼鈍炉からウオータークエンチ装置へ直接導くバイパス装置を設け、該バイパス装置の内部は非酸化性雰囲気に保ち、鋼板の連続焼鈍と溶融メッキを切り替えて行う設備において、連続焼鈍炉の出側およびウオータークエンチ装置の入側にシール機構を設け、切替作業時に連続焼鈍炉内への外気の侵入、およびバイパス装置内へのウオータークエンチ装置からの水蒸気の侵入を防止することを特徴とする連続焼鈍および溶融メッキ兼用設備。A bypass device that directly guides the steel plate from the continuous annealing furnace to the water quenching device without touching the atmosphere is installed at least in the line where the continuous annealing furnace, plating pot and plating device, and water quenching device are arranged along the flow direction of the steel plate. , Chi coercive inside the non-oxidizing atmosphere of the bypass device, in performing switching the continuous annealing and hot dip of the steel sheet facility, a seal mechanism provided on the entry side of the outlet side and a water quench apparatus of the continuous annealing furnace, switching work A facility for combined continuous annealing and hot dipping, which sometimes prevents the intrusion of outside air into the continuous annealing furnace and the intrusion of water vapor from the water quench device into the bypass device . 連続焼鈍炉の出側に設けたシール機構を構成するシール装置のうち少なくとも１つは非接触シールであることを特徴とする請求項１記載の連続焼鈍炉および溶融メッキ兼用設備。  2. A continuous annealing furnace and a facility for hot dip plating according to claim 1, wherein at least one of the sealing devices constituting the sealing mechanism provided on the outlet side of the continuous annealing furnace is a non-contact seal. ウオータークエンチ装置の入側に設けたシール機構が複数のシール装置からなり、該複数のシール装置の間から雰囲気を吸い出す排気ファンを設置したことを特徴とする請求項１または２記載の連続焼鈍炉および溶融メッキ兼用設備。  The continuous annealing furnace according to claim 1 or 2, wherein the sealing mechanism provided on the inlet side of the water quench device comprises a plurality of sealing devices, and an exhaust fan for sucking out an atmosphere from the plurality of sealing devices is installed. And hot dipping plating equipment.
JP2001069574A 2001-03-13 2001-03-13 Facilities for continuous annealing and hot dipping Expired - Lifetime JP4728494B2 (en)

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JP4171454B2 (en) 2004-11-19 2008-10-22 新日本製鐵株式会社 Equipment for manufacturing high-strength steel sheets or hot-dip galvanized high-strength steel sheets with excellent elongation and hole expansibility
JP4700527B2 (en) * 2006-03-07 2011-06-15 新日本製鐵株式会社 Continuous molten metal plating equipment
JP6450109B2 (en) 2014-08-11 2019-01-09 Ｊｆｅスチール株式会社 Steel strip manufacturing equipment
JP6451138B2 (en) * 2014-08-11 2019-01-16 Ｊｆｅスチール株式会社 Steel strip manufacturing method
FR3095452A1 (en) * 2019-04-29 2020-10-30 Fives Stein Dual Purpose Metal Strip Continuous Processing Line

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Publication number Priority date Publication date Assignee Title
JPS5871366A (en) * 1981-10-22 1983-04-28 Nippon Steel Corp Combined manufacturing facility for cold rolled steel plate and zinc hot dipped steel plate
JPS6164826A (en) * 1984-05-23 1986-04-03 Daido Steel Co Ltd Sealing device
JPH11124634A (en) * 1997-10-22 1999-05-11 Nkk Corp Heat treatment apparatus of steel strip in continuous annealing process and its heat treatment method
JPH11279731A (en) * 1998-03-31 1999-10-12 Nippon Steel Corp Continuous hot-dipping and annealing equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5871366A (en) * 1981-10-22 1983-04-28 Nippon Steel Corp Combined manufacturing facility for cold rolled steel plate and zinc hot dipped steel plate
JPS6164826A (en) * 1984-05-23 1986-04-03 Daido Steel Co Ltd Sealing device
JPH11124634A (en) * 1997-10-22 1999-05-11 Nkk Corp Heat treatment apparatus of steel strip in continuous annealing process and its heat treatment method
JPH11279731A (en) * 1998-03-31 1999-10-12 Nippon Steel Corp Continuous hot-dipping and annealing equipment

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