JPH08269659A - Method and device for removing dross in snout in continuous hot dipping bath - Google Patents
Method and device for removing dross in snout in continuous hot dipping bathInfo
- Publication number
- JPH08269659A JPH08269659A JP7640895A JP7640895A JPH08269659A JP H08269659 A JPH08269659 A JP H08269659A JP 7640895 A JP7640895 A JP 7640895A JP 7640895 A JP7640895 A JP 7640895A JP H08269659 A JPH08269659 A JP H08269659A
- Authority
- JP
- Japan
- Prior art keywords
- snout
- dross
- nozzle
- suction
- steel strip
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、連続溶融亜鉛めっきお
よび連続溶融アルミニウムめっきなどの連続溶融めっき
におけるスナウト内ドロスの除去方法および装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing dross in a snout in continuous hot dip galvanizing such as continuous hot dip galvanizing and continuous hot dip aluminum coating.
【０００２】[0002]
【従来の技術】従来から、還元焼鈍炉を有する連続溶融
めっき設備、たとえば連続溶融亜鉛めっき設備および連
続溶融アルミニウムめっき設備などにおいては、図７に
示すように還元焼鈍炉８と、溶融めっき金属５が貯留さ
れている貯留槽１７との間に筒状のスナウト１が設けら
れている。スナウト１は、還元焼鈍炉８において焼きな
ましおよび還元清浄化された鋼帯６を還元性雰囲気で保
護したまま、溶融めっき金属５中に浸漬するための連結
装置である。このためスナウト１の一端部は、還元焼鈍
炉８に接続され、他端部は溶融めっき金属５の中に部分
的に浸漬されており、スナウト１の内部には、還元性雰
囲気ガスが満たされている。2. Description of the Related Art Conventionally, in a continuous hot-dip galvanizing equipment having a reduction annealing furnace, such as a continuous hot-dip galvanizing equipment and a continuous hot-dip aluminum coating equipment, as shown in FIG. The cylindrical snout 1 is provided between the storage tank 17 and the storage tank 17. The snout 1 is a connecting device for immersing the steel strip 6 annealed and reduced and cleaned in the reduction annealing furnace 8 in the hot dip metal 5 while being protected in a reducing atmosphere. Therefore, one end of the snout 1 is connected to the reduction annealing furnace 8 and the other end is partially immersed in the hot-dip metal 5, and the inside of the snout 1 is filled with a reducing atmosphere gas. ing.
【０００３】溶融めっき金属５の浴面からは、めっき金
属の蒸気が発生する。この金属蒸気は、スナウト１の内
壁面に接触し、アッシュとなってスナウトの内壁面に凝
着する。溶融めっき金属５の浴面レベルは、溶融めっき
操業時には、若干の上下変動、たとえば±２０ｍｍを生
じるので、スナウト１の浴面付近の内壁に凝着しためっ
き金属のアッシュは、溶融めっき金属５の浴面の上昇時
に浴と接触してスナウト１の内壁から剥離し、ドロス４
となって浴面に浮遊する。また溶融めっき金属５と接触
しない高さ位置に凝着したアッシュは、次第に堆積して
塊状となり、スナウト１の振動などによって壁面から剥
離し、溶融めっき金属５中に落下して浮遊ドロス４とな
る。このようにスナウト１内の溶融めっき金属５の浴面
上には、ドロス４が生成し、浮遊する。この浮遊ドロス
４は、溶融めっき金属５中に浸漬される鋼帯６の表面に
付着し、鋼帯表面の均質なめっき層の形成を妨げるの
で、溶融めっき鋼帯の表面品質欠陥を生じさせる原因と
なる。Vapor of the plating metal is generated from the bath surface of the hot-dip metal 5. This metal vapor comes into contact with the inner wall surface of the snout 1 and becomes ash to adhere to the inner wall surface of the snout. The bath surface level of the hot-dip galvanized metal 5 slightly fluctuates vertically during the hot-dip galvanizing operation, for example, ± 20 mm. Therefore, the ash of the hot-dip galvanized metal adhered to the inner wall near the bath surface of the snout 1 is When the bath surface rises, it comes in contact with the bath and peels off from the inner wall of the snout 1,
And float on the surface of the bath. Also, the ash that has adhered to the height position where it does not come into contact with the hot-dip galvanized metal 5 gradually accumulates and becomes a lump, and is separated from the wall surface due to the vibration of the snout 1, etc., and falls into the hot-dipped galvanized metal 5 to become floating dross 4. . Thus, dross 4 is generated and floats on the bath surface of the hot-dip metal 5 in the snout 1. The floating dross 4 adheres to the surface of the steel strip 6 that is immersed in the hot-dip galvanized metal 5 and prevents the formation of a uniform plating layer on the surface of the steel strip, which causes the surface quality defect of the hot-dip steel strip. Becomes
【０００４】前記表面欠陥は、溶融めっき鋼帯として
は、致命的な欠陥であるので、前記問題に対して従来か
ら次のような対策が提案されている。 スナウト１内のドロス排出作業を定期的に実施する。 スナウト１内にガス噴射ノズルを設置し、窒素ガスの
ような非酸化性ガスを噴射して浮遊ドロス４をスナウト
１の内壁面側に押しやり、スナウト１の内壁面に設置し
た吸込みポンプで、浮遊ドロス４をスナウト１の外部へ
排出する（実開平７−６２６０）。 溶融めっき金属５の浴面から発生する金属蒸気に、外
部から強制冷却を加えて浴面上で凝縮させ、めっき浴に
落下させる（特開昭６３−２７７７４６号公報）。Since the surface defect is a fatal defect for the hot-dip galvanized steel strip, the following measures have been conventionally proposed for the above problem. The dross discharge work inside Snout 1 is carried out regularly. A gas injection nozzle is installed in the snout 1, and a non-oxidizing gas such as nitrogen gas is injected to push the floating dross 4 toward the inner wall surface of the snout 1, and with a suction pump installed on the inner wall surface of the snout 1, The floating dross 4 is discharged to the outside of the snout 1 (actual Kaihei 7-6260). The metal vapor generated from the bath surface of the hot-dip galvanized metal 5 is subjected to forced cooling from the outside, condensed on the bath surface, and dropped into the plating bath (Japanese Patent Laid-Open No. 63-277746).
【０００５】[0005]
【発明が解決しようとする課題】前述のように、スナウ
ト１内における溶融めっき金属５の浴面上の浮遊ドロス
対策として、種々の方法が提案されているけれども、そ
れぞれ次のような問題がある。前記の対策は、浮遊ド
ロス除去作業の実施の都度、ラインを停止する必要があ
るので、溶融めっき設備の生産性が大幅に低下する。前
記の対策は、浮遊ドロスの生成量が比較的少ない場合
には、比較的有効な対策であるけれども、浮遊ドロスの
生成量が多い場合には、非酸化性ガスの多量の消費を必
要とするので、非酸化性ガスを噴射するノズルヘッダ
は、その非酸化性ガスによって冷却され、かえって金属
蒸気が凝着しやすくなり、ドロス生成量の増加を招く。
前記の対策は、めっき金属蒸気を凝縮させる強制冷却
作用の影響が、スナウト１内を通過する鋼帯６に加わる
ので、めっき性の低下等の不具合が生じる。As described above, various methods have been proposed as measures against floating dross on the bath surface of the hot-dip metal 5 in the snout 1, but each has the following problems. . In the above measures, the line needs to be stopped each time the floating dross removing work is performed, so that the productivity of the hot dip plating facility is significantly reduced. The above countermeasure is a relatively effective countermeasure when the amount of floating dross generated is relatively small, but requires a large amount of non-oxidizing gas consumption when the amount of floating dross generated is large. Therefore, the nozzle header for injecting the non-oxidizing gas is cooled by the non-oxidizing gas, and the metal vapor is more likely to adhere to the nozzle header, resulting in an increase in the amount of dross produced.
In the above measures, the effect of the forced cooling action of condensing the plating metal vapor is exerted on the steel strip 6 passing through the inside of the snout 1, so that problems such as deterioration of the plating property occur.
【０００６】本発明の目的は、前記問題を解決し、スナ
ウト内のドロスを効率的、かつ確実に除去することがで
きるスナウト内ドロスの除去方法および装置を提供する
ことである。An object of the present invention is to provide a method and apparatus for eliminating the dross in the snout, which can solve the above-mentioned problems and efficiently and reliably remove the dross in the snout.
【０００７】[0007]
【課題を解決するための手段】本発明は、溶融めっき金
属が貯留される貯留槽内に配置されている浸漬ロール
に、鋼帯を、溶融めっき金属の上部付近に部分的に浸漬
されるスナウト内を経て巻掛けて走行させ、鋼帯表面を
めっきする連続溶融めっきにおけるスナウト内ドロスの
除去方法において、スナウト内で溶融めっき金属をその
浴面付近に設けられる供給ノズルから供給し、供給ノズ
ルから間隔をあけて配置された吸込みノズルから溶融め
っき金属の浴面付近のドロスを吸込み、スナウトの外方
に導くことを特徴とする連続溶融めっきにおけるスナウ
ト内ドロスの除去方法である。また本発明は、溶融めっ
き金属が貯留される貯留槽内に配置されている浸漬ロー
ルに、鋼帯を、溶融めっき金属の上部付近に部分的に浸
漬されるスナウト内を経て巻掛けて走行させ、鋼帯表面
をめっきする連続溶融めっきにおけるスナウト内ドロス
の除去装置において、スナウト内の浴面付近で、めっき
されるべき鋼帯の浸漬ロール側の表面寄りで、鋼帯の幅
方向の一外側方で前記幅方向内方に開口する供給ノズル
と、スナウト内の浴面付近で、めっきされるべき鋼帯の
浸漬ロール側の表面寄りで、鋼帯の幅方向の他外側方で
前記幅方向内方に前記供給ノズルに対向して開口する吸
込みノズルと、一端部が供給ノズルを形成し、スナウト
外部に延びる供給管路と、供給管路の他端部に設けら
れ、貯留槽内におけるスナウト外部の溶融めっき金属を
供給ノズルに供給する供給ポンプと、一端部が吸込みノ
ズルを形成し、スナウト外部に延びる吸込み管路と、吸
込み管路の他端部に設けられ、スナウト内の浴面付近の
ドロスを吸込み、スナウト外部の貯留槽内に排出する吸
込みポンプとを含むことを特徴とする連続溶融めっきに
おけるスナウト内ドロスの除去装置である。また本発明
は、供給ノズルと、供給管路と、供給ポンプとを一体的
に上下に変位して上下の位置を調整する第１上下位置調
整手段と、吸込みノズルと、吸込み管路と、吸込みポン
プとを一体的に上下に変位して上下の位置を調整する第
２上下位置調整手段とを含むことを特徴とする。また本
発明の供給ノズルの開口部は、水平かつ浸漬ロールの軸
線に平行な軸線を有し、吸込みノズルの開口部は、上下
に延びる筒体をその上下の軸線に対して傾斜した仮想平
面内で分断した形状を有することを特徴とする。また本
発明の供給管路の供給ノズルに連なる上下に延びる部分
は、スナウトの供給管路を臨む内周面に平行に延び、軸
線方向に一様な外形を有し、吸込み管路の吸込みノズル
に連なる上下に延びる部分は、スナウトの吸込み管路を
臨む内周面に平行に延び、軸線方向に一様な外形を有す
ることを特徴とする。また本発明のスナウトには、浸漬
ロールの軸線方向の少なくとも一側部に鋼帯の溶融めっ
き金属への浸漬位置付近を見るための透光性部材で覆わ
れた覗き窓が配置されることを特徴とする。DISCLOSURE OF THE INVENTION The present invention is a snout in which a steel strip is partially immersed in the vicinity of an upper portion of the hot dip metal in a dipping roll arranged in a storage tank in which the hot dip metal is stored. In the method of removing dross in the snout in continuous hot dip plating in which the steel strip surface is plated, the hot dip plated metal is supplied from the supply nozzle provided near the bath surface in the snout, and supplied from the supply nozzle. This is a method for removing dross in snout in continuous hot dip plating, which sucks dross near the bath surface of the hot dip metal from suction nozzles arranged at intervals and guides it to the outside of the snout. Further, the present invention, a dipping roll arranged in a storage tank in which the hot-dip galvanized metal is stored, a steel strip is wound around a snout which is partially dipped near the upper portion of the hot-dip galvanized metal and run. , In a device for removing dross in a snout in continuous hot dip plating for plating the surface of a steel strip, near the bath surface in the snout, near the surface of the steel strip to be plated on the dipping roll side, and one outside in the width direction of the steel strip. Supply nozzle opening inward in the width direction, and near the bath surface in the snout, near the surface of the steel strip to be plated on the dipping roll side, and in the width direction on the other side in the width direction of the steel strip. A suction nozzle that opens inwardly facing the supply nozzle, a supply pipe having one end forming a supply nozzle and extending outside the snout, and a snout provided in the other end of the supply pipe and provided in the storage tank. External hot-dip gold A supply pump that supplies the supply nozzle to the supply nozzle, one end of which forms a suction nozzle, and a suction pipe line that extends to the outside of the snout and the other end of the suction pipe line that sucks dross near the bath surface in the snout, A device for removing dross in a snout in continuous hot dip plating, comprising: a suction pump that discharges into a storage tank outside the snout. Further, according to the present invention, the supply nozzle, the supply conduit, and the supply pump are integrally vertically displaced to adjust the upper and lower positions, and the first vertical position adjusting means, the suction nozzle, the suction conduit, and the suction conduit. Second vertical position adjusting means for adjusting the vertical position by integrally displacing the pump vertically. Further, the opening of the supply nozzle of the present invention has an axis that is horizontal and parallel to the axis of the dipping roll, and the opening of the suction nozzle is a virtual plane in which a vertically extending cylinder is inclined with respect to the upper and lower axes. It has a shape divided by. Further, the vertically extending portion of the supply pipe of the present invention that extends in the vertical direction extends parallel to the inner peripheral surface of the snout facing the supply pipe, has a uniform outer shape in the axial direction, and is a suction nozzle of the suction pipe. Is characterized in that it extends parallel to the inner peripheral surface of the snout facing the suction pipe line and has a uniform outer shape in the axial direction. Further, in the snout of the present invention, a peep window covered with a translucent member for observing the vicinity of the dipping position of the steel strip in the hot dip plated metal is arranged on at least one side in the axial direction of the dipping roll. Characterize.
【０００８】[0008]
【作用】本発明に従えば、連続溶融めっきにおけるスナ
ウト内ドロスの除去は、スナウト内で溶融めっき金属を
その浴面付近に供給ノズルから供給して溶融めっき金属
の流れを形成し、スナウト内ドロスを供給ノズルから間
隔をあけて配置された吸込みノズル近辺に移動させて集
積し、集積したドロスを吸込みノズルから吸込み、スナ
ウトの外方に導くことによって行われる。このようにス
ナウト内ドロスは、供給ノズルから供給される溶融めっ
き金属の流れによって吸込みノズル近辺に移動集積され
た後、吸込みノズルから排出除去されるので、スナウト
内ドロスの除去が効率的かつ確実に行われる。このた
め、めっきされるべき鋼帯へのドロスの付着が少なくな
り、ドロスに起因するめっき欠陥の発生が大幅に低減さ
れる。また冷却効果を有する非酸化性ガスを使用しない
ので、非酸化性ガスによって溶融めっき金属蒸気が冷却
されドロス生成量が増大するという問題が解消される。According to the present invention, the dross in the snout in the continuous hot dip plating is removed by supplying the hot dip metal in the snout near the bath surface from the supply nozzle to form the flow of the hot dip metal in the snout. Is moved to the vicinity of the suction nozzle arranged at a distance from the supply nozzle and accumulated, and the accumulated dross is sucked from the suction nozzle and guided to the outside of the snout. In this way, the dross in the snout is moved and accumulated near the suction nozzle by the flow of the molten plating metal supplied from the supply nozzle, and then discharged and removed from the suction nozzle, so that the dross in the snout can be removed efficiently and reliably. Done. Therefore, the adhesion of dross to the steel strip to be plated is reduced, and the occurrence of plating defects due to dross is significantly reduced. Further, since no non-oxidizing gas having a cooling effect is used, the problem that the non-oxidizing gas cools the hot-dip galvanized metal vapor to increase the amount of dross generated is solved.
【０００９】また本発明に従えば、連続溶融めっきにお
けるスナウト内ドロスの除去装置は、供給ノズルと、吸
込みノズルと、供給管路と、排出管路と、供給ポンプ
と、吸込みポンプとを含む。供給ノズルは、スナウト内
の浴面付近でめっきされるべき鋼帯の浸漬ロール側の表
面寄りで鋼帯の幅方向の一外側方で鋼帯の幅方向内方に
開口しており、供給管路の一端部は供給ノズルを形成
し、その他端部はスナウト外部に延びている。供給ポン
プは、供給管路の他端部に設けられ、溶融めっき金属の
貯留される貯留槽内におけるスナウト外部の溶融めっき
金属をスナウト内部に供給し、供給ノズルから吸込みノ
ズルに向かう溶融めっき金属の流れを形成する。吸込み
ノズルは、スナウト内の浴面付近でめっきされるべき鋼
帯の浸漬ロール側の表面寄りで、鋼帯の幅方向の他外側
方で鋼帯の幅方向内方に供給ノズルに対向して開口して
おり、排出管路の一端部は吸込みノズルを形成し、その
他端部はスナウト外部に延びている。吸込みポンプは、
排出管路の他端部に設けられ、前記溶融めっき金属の流
れによって吸込みノズル近辺に移動集積したドロスを吸
込みノズルから吸込み、スナウト外部の貯留槽内に排出
する。このように鋼帯の浸漬ロール側の表面寄りでドロ
スが確実に除去されるので、鋼帯が浸漬ロールに巻掛け
られて走行するとき、ドロスが浸漬ロールによって鋼帯
上に押込まれて表面欠陥が発生するという問題が解消さ
れる。またスナウト内ドロスの除去装置は、連続溶融め
っき設備の操業中にスナウト内ドロスの除去を効率的か
つ確実に行うことができるので、ドロス除去のための設
備休止が不要である。According to the present invention, the device for removing dross in snout in continuous hot dip plating includes a supply nozzle, a suction nozzle, a supply pipe line, a discharge pipe line, a supply pump, and a suction pump. The supply nozzle is open to the inside of the steel strip in the widthwise inward direction on one side in the widthwise direction of the steel strip near the surface of the steel strip to be plated near the bath surface in the snout, on the side of the dipping roll. One end of the channel forms the feed nozzle and the other end extends outside the snout. The supply pump is provided at the other end of the supply pipe line, supplies the hot-dip galvanized metal outside the snout in the storage tank in which the hot-dip galvanized metal is stored, and supplies the hot-dip galvanized metal from the feed nozzle to the suction nozzle. Form a stream. The suction nozzle is near the surface of the steel strip to be plated near the bath surface in the snout, on the dipping roll side, and on the other side in the width direction of the steel strip, facing the supply nozzle in the width direction of the steel strip. It is open, one end of the discharge line forms the suction nozzle and the other end extends outside the snout. The suction pump is
The dross, which is provided at the other end of the discharge pipe and moved and accumulated near the suction nozzle by the flow of the hot-dip metal, is sucked from the suction nozzle and discharged into the storage tank outside the snout. In this way, the dross is reliably removed near the surface of the steel strip on the dipping roll side, so when the steel strip is wound around the dipping roll and travels, the dross is pushed onto the steel strip by the dipping roll and causes surface defects. The problem of occurrence of is solved. In addition, the device for removing dross in the snout can remove the dross in the snout efficiently and reliably during the operation of the continuous hot-dip galvanizing equipment, so that there is no need to suspend the equipment for removing the dross.
【００１０】また本発明に従えば、連続溶融めっきにお
けるスナウト内ドロスの除去装置は、第１上下位置調整
手段と、第２上下位置調整手段とを含む。第１上下位置
調整手段は、供給ノズルと、供給管路と、供給ポンプと
を一体的に上下に変位して上下の位置を調整することが
できるので、スナウト内の溶融めっき金属の浴面が変動
しても、それに同調して上下位置を調整し、供給ノズル
から吸込みノズルへの溶融めっき金属の流れを適正に形
成することができる。第２上下位置調整手段は、吸込み
ノズルと、吸込み管路と、吸込みポンプとを一体的に上
下に変位して上下の位置を調整することができるので、
スナウト内の溶融めっき金属の浴面およびスナウト内ド
ロス厚さが変動しても、それに同調して上下位置を調整
し最適位置でスナウト内ドロスを吸込むことができる。
また供給ノズルと吸込みノズルとの上下位置調整を個別
に行うことができるので、ドロスを確実に吸込むために
供給ノズルよりも正確な上下位置調整が必要である吸込
みノズルの上下位置を供給ノズルとは別個に最適位置に
調整することができる。Further, according to the invention, the device for removing dross in snout in continuous hot dip plating includes a first vertical position adjusting means and a second vertical position adjusting means. The first vertical position adjusting unit can vertically displace the supply nozzle, the supply pipe line, and the supply pump integrally to adjust the vertical position, so that the bath surface of the hot-dip galvanized metal in the snout can be adjusted. Even if it fluctuates, the vertical position can be adjusted in synchronism with it to properly form the flow of the hot-dip metal from the supply nozzle to the suction nozzle. Since the second vertical position adjusting means can vertically displace the suction nozzle, the suction pipe line, and the suction pump integrally and adjust the vertical position,
Even if the bath surface of the hot-dip metal in the snout and the dross thickness in the snout fluctuate, the vertical position can be adjusted in synchronization with this and the dross in the snout can be sucked in at the optimum position.
Also, since the vertical position adjustment of the supply nozzle and the suction nozzle can be performed individually, the vertical position of the suction nozzle must be adjusted more accurately than the supply nozzle in order to surely suck the dross. Can be adjusted to the optimum position.
【００１１】また本発明に従えば、供給ノズルの開口部
は、水平かつ浸漬ロールの軸線に平行な軸線を有してい
るので、その軸線は鋼帯表面に平行な軸線となり、供給
ノズルの開口部から吸込みノズルの開口部に向かう溶融
めっき金属の流れが確実に形成される。また吸込みノズ
ルの開口部は、上下に延びる筒体をその上下の軸線に対
して傾斜した仮想平面内で分断した形状を有しているの
で、開口部の高さ方向の寸法が大きくなり、ドロスの上
下方向位置が変動してもドロスを確実に吸込むことが可
能となる。Further, according to the invention, since the opening of the supply nozzle has an axis which is horizontal and parallel to the axis of the dipping roll, the axis becomes an axis parallel to the surface of the steel strip and the opening of the supply nozzle. A flow of the hot-dip galvanized metal from the portion toward the opening of the suction nozzle is reliably formed. Further, since the opening of the suction nozzle has a shape in which a vertically extending cylindrical body is divided within an imaginary plane inclined with respect to the upper and lower axes, the dimension in the height direction of the opening becomes large, and the dross becomes large. Even if the vertical position of the fluctuates, the dross can be reliably sucked.
【００１２】また本発明に従えば、スナウト内において
供給管路および吸込み管路の供給ノズルおよび吸込みノ
ズルに連なる上下に延びる部分は、スナウトの供給管路
および吸込み管路を臨む内周面に平行に延びている。こ
のため上下位置調整手段の上下位置調整の上昇時にそれ
らが上昇しすぎてスナウトに接触しても、スナウトの内
周面と線接触するので、スナウトに傷を付けるおそれが
ない。According to the invention, the vertically extending portions of the supply pipe and the suction pipe connected to the supply nozzle and the suction nozzle in the snout are parallel to the inner peripheral surfaces of the snout facing the supply pipe and the suction pipe. Extends to. For this reason, even if they are raised too much and come into contact with the snout at the time of raising the vertical position adjustment means, since there is line contact with the inner peripheral surface of the snout, there is no risk of scratching the snout.
【００１３】また本発明に従えば、スナウトには浸漬ロ
ールの軸線方向の少なくとも一側部に鋼帯の溶融めっき
金属への浸漬位置付近を見るための透光性部材で覆われ
た覗き窓が配置されているので、スナウト内のドロスの
状況を観察することが可能であり、供給ノズルおよび吸
込みノズルの上下位置調整を適正に行うことができる。According to the present invention, the snout has a peep window covered with a transparent member on at least one side in the axial direction of the dipping roll for seeing the vicinity of the dipping position of the steel strip in the hot dip metal. Since they are arranged, it is possible to observe the condition of the dross in the snout, and it is possible to properly adjust the vertical positions of the supply nozzle and the suction nozzle.
【００１４】[0014]
【実施例】図１は本発明の一実施例であるスナウト内ド
ロスの除去装置の簡略化された構成を示す側面図であ
り、図２は図１に示すスナウト内ドロスの除去装置の正
面図であり、図３は図１に示すスナウト内ドロスの除去
装置の切断面線ＩＩＩ−ＩＩＩから見た平面図である。
図１〜図３には、スナウト内ドロスの除去装置１０が設
けられている連続溶融めっき設備のスナウト１近辺の簡
略化された構成も併せて示している。1 is a side view showing a simplified structure of a device for removing dross in snout according to an embodiment of the present invention, and FIG. 2 is a front view of the device for removing dross in snout shown in FIG. FIG. 3 is a plan view of the device for removing dross in snout shown in FIG. 1, taken along the line III-III.
1 to 3 also show a simplified configuration near the snout 1 of the continuous hot-dip plating facility in which the device 10 for removing dross in the snout is provided.
【００１５】スナウト１近辺の連続溶融めっき設備、た
とえば連続溶融亜鉛めっき設備および連続溶融アルミニ
ウムめっき設備は、還元焼鈍炉８と、スナウト１と、溶
融めっき金属５が貯留されている貯留槽１７と、溶融め
っき金属５中に浸漬されている浸漬ロール７とを含んで
構成される。還元焼鈍炉８は、鋼帯６を還元性雰囲気中
で焼なましするとともに、表面を還元清浄化するための
熱処理炉である。スナウト１は、鋼帯６を還元性雰囲気
で保護したまま溶融めっき金属５中に浸漬するための連
結装置であり、スナウト１の一端部は、還元焼鈍炉８に
接続され、他端部は溶融めっき金属５中に部分的に浸漬
されている。スナウト１の他端部１９は、亜鉛およびア
ルミニウムなどの溶融めっき金属に対する耐食性に優れ
た材料、たとえばセラミックス、または耐熱鋼鋳鋼品に
よって構成されている。還元焼鈍炉８およびスナウト１
の内部に導入されている還元性雰囲気ガスの成分は、た
とえば５０％Ｈ2−５０％Ｎ2である。鋼帯６は、還元焼
鈍炉８からブライドルロール１８を経てスナウト１に搬
入される。還元焼鈍炉８およびスナウト１において表面
を清浄化された鋼帯６は、スナウト１を経て溶融めっき
金属５中に浸漬され、浸漬ロール７に巻掛けられて走行
し、溶融めっきされた後、溶融めっき金属５から大気中
に搬出される。The continuous hot-dip galvanizing equipment in the vicinity of the snout 1, such as the continuous hot-dip galvanizing equipment and the continuous hot-dip aluminum coating equipment, comprises a reduction annealing furnace 8, a snout 1, and a storage tank 17 in which the hot-dip metal 5 is stored. And a dipping roll 7 dipped in the hot-dip metal 5. The reduction annealing furnace 8 is a heat treatment furnace for annealing the steel strip 6 in a reducing atmosphere and reducing and cleaning the surface. The snout 1 is a connecting device for immersing the steel strip 6 in the hot dip metal 5 while protecting it in a reducing atmosphere. One end of the snout 1 is connected to a reduction annealing furnace 8 and the other end is melted. It is partially immersed in the plating metal 5. The other end 19 of the snout 1 is made of a material having excellent corrosion resistance to hot-dip galvanized metals such as zinc and aluminum, for example, ceramics or heat-resistant cast steel products. Reduction annealing furnace 8 and snout 1
The component of the reducing atmosphere gas introduced into the inside is, for example, 50% H 2 -50% N 2 . The steel strip 6 is carried into the snout 1 from the reduction annealing furnace 8 through the bridle roll 18. The steel strip 6 whose surface has been cleaned in the reduction annealing furnace 8 and the snout 1 is immersed in the hot-dip galvanized metal 5 through the snout 1 and wound around a dipping roll 7 to run, and after being hot-dipped, melted The plated metal 5 is carried into the atmosphere.
【００１６】スナウト内ドロスの除去装置１０は、貯留
槽１７内におけるスナウト１外部の溶融めっき金属５を
スナウト１内に供給する供給手段である供給ノズル２、
供給管路１１および供給ポンプ１３と、スナウト内ドロ
ス４を吸込む吸込み手段である吸込みノズル３、吸込み
管路１２および吸込みポンプ１４と、前記供給手段を一
体的に上下に変位して上下の位置を調整する第１上下位
置調整手段１５と、前記吸込み手段を一体的に上下に変
位して上下の位置を調整する第２上下位置調整手段１６
とを含んで構成される。The device 10 for removing dross in the snout is a supply nozzle 2 which is a supply means for supplying the molten plated metal 5 outside the snout 1 in the storage tank 17 into the snout 1.
The supply pipe 11 and the supply pump 13, the suction nozzle 3 which is a suction unit for sucking the dross 4 in the snout, the suction pipe line 12, and the suction pump 14, and the supply unit are integrally displaced vertically to move the upper and lower positions. The first vertical position adjusting means 15 for adjusting and the second vertical position adjusting means 16 for vertically moving the suction means integrally to adjust the vertical position.
It is comprised including.
【００１７】供給ノズル２は、スナウト１内の浴面付近
で、かつ鋼帯６の幅方向の一外側方（図２において紙面
の右側）に設けられ、鋼帯６の幅方向内方（図２におい
て紙面の左側）に開口した開口部を有している。また供
給ノズル２は、めっきされるべき鋼帯６の浸漬ロール７
側の表面寄りに設けられている。供給ノズル２の開口部
２ａは、図４に示すように円形の形状を有しており、そ
の軸線は水平かつ浸漬ロール７の軸線に平行、したがっ
て鋼帯表面に平行となる。供給管路１１の一端部は供給
ノズル２を形成し、他端部はスナウト外部に延びて、供
給ポンプ１３に接続されている。供給ポンプ１３は、供
給管路１１の他端部に設けられ、貯留槽１７内における
スナウト１外部の溶融めっき金属５を圧送し、スナウト
１内の供給ノズル２から噴流させる。前述のように供給
ノズル２の開口部２ａの軸線は鋼帯表面に平行であるの
で、鋼帯６の浸漬ロール７側の表面寄りに溶融めっき金
属５の流れが鋼帯６の表面に沿って矢符２８方向に形成
される。The supply nozzle 2 is provided in the vicinity of the bath surface in the snout 1 and on one outer side in the width direction of the steel strip 6 (on the right side of the paper surface in FIG. 2), and inward in the width direction of the steel strip 6 (see FIG. 2 has an opening that is open to the left side of the drawing). The supply nozzle 2 also comprises a dipping roll 7 for the steel strip 6 to be plated.
It is provided near the surface on the side. The opening 2a of the supply nozzle 2 has a circular shape as shown in FIG. 4, and its axis is horizontal and parallel to the axis of the dipping roll 7, and thus parallel to the steel strip surface. One end of the supply pipe 11 forms the supply nozzle 2, and the other end extends outside the snout and is connected to the supply pump 13. The supply pump 13 is provided at the other end of the supply pipeline 11 and pressure-feeds the hot-dip galvanized metal 5 outside the snout 1 in the storage tank 17 and causes it to flow from the supply nozzle 2 in the snout 1. As described above, since the axis of the opening 2a of the supply nozzle 2 is parallel to the surface of the steel strip, the flow of the hot-dip metal 5 along the surface of the steel strip 6 near the surface of the steel strip 6 on the dipping roll 7 side. It is formed in the direction of arrow 28.
【００１８】吸込みノズル３は、スナウト１内の浴面付
近で、かつ鋼帯６の幅方向の他外側方（図２において紙
面の左側）に設けられ、鋼帯６の幅方向内方（図２にお
いて紙面の右側）に供給ノズル２と対向して開口した開
口部を有している。また吸込みノズル３は、供給ノズル
２と同様にめっきされるべき鋼帯６の浸漬ロール７側の
表面寄りに設けられている。吸込みノズル３の開口部３
ａは、図５に示すように上下に延びる筒体である吸込み
管路１２の一端部をその上下の軸線に対して傾斜した仮
想平面内で分断した形状を有している。このため開口部
３ａの高さ方向の寸法が大きくなり、ドロスの上下方向
位置が変動してもドロスを確実に吸込むことが可能とな
る。吸込み管路１２の一端部は吸込みノズル３を形成
し、他端部はスナウト外部に延びて吸込みポンプ１４に
接続されている。吸込みポンプ１４は、吸込み管路１２
の他端部に設けられ、スナウト１内の浴面付近のドロス
４を吸込みノズル３から吸込み、スナウト１の外部の貯
留槽１７内に排出する。なお供給管路１１および吸込み
管路１２の材質は、ステンレス鋼（ＳＵＳ３１６Ｌ）で
あり、それらの直径は、たとえば８０ｍｍである。また
吸込みノズル３の開口部３ａの高さ方向寸法は、たとえ
ば１００ｍｍである。The suction nozzle 3 is provided in the vicinity of the bath surface in the snout 1 and on the outer side in the width direction of the steel strip 6 (on the left side of the paper surface in FIG. 2), and inward in the width direction of the steel strip 6 (FIG. 2 has a opening portion on the right side of the drawing) facing the supply nozzle 2. Further, the suction nozzle 3 is provided near the surface of the steel strip 6 to be plated on the dipping roll 7 side, like the supply nozzle 2. Opening 3 of suction nozzle 3
As shown in FIG. 5, a has a shape obtained by dividing one end of the suction conduit 12 that is a vertically extending cylindrical body in a virtual plane inclined with respect to the upper and lower axes. Therefore, the dimension of the opening 3a in the height direction becomes large, and the dross can be reliably sucked in even if the vertical position of the dross changes. One end of the suction conduit 12 forms the suction nozzle 3, and the other end extends outside the snout and is connected to the suction pump 14. The suction pump 14 has a suction line 12
Is provided at the other end of the snout 1, sucks the dross 4 near the bath surface in the snout 1 from the suction nozzle 3, and discharges it into the storage tank 17 outside the snout 1. The material of the supply pipeline 11 and the suction pipeline 12 is stainless steel (SUS316L), and their diameter is, for example, 80 mm. The size of the opening 3a of the suction nozzle 3 in the height direction is 100 mm, for example.
【００１９】前述のように吸込みノズル３の開口部３ａ
は、供給ノズル２の開口部２ａと対向して間隔をあけて
設けられているので、前記溶融めっき金属５の流れに沿
って吸込みノズル３付近に移動集積したドロス４は、前
記開口部３ａを介して効率的に吸込まれ、スナウト１の
外部に確実に排出除去される。このため、めっきされる
べき鋼帯６へのスナウト内ドロス４の付着が少なくな
り、スナウト内ドロス４に起因するめっき欠陥の発生が
大幅に低減される。As described above, the opening 3a of the suction nozzle 3
Are provided facing the opening 2a of the supply nozzle 2 with a space therebetween, so that the dross 4 that has moved and accumulated in the vicinity of the suction nozzle 3 along the flow of the hot-dip galvanized metal 5 moves through the opening 3a. It is efficiently sucked through and is securely discharged to the outside of the snout 1. Therefore, the adhesion of the dross 4 in the snout to the steel strip 6 to be plated is reduced, and the occurrence of plating defects caused by the dross 4 in the snout is significantly reduced.
【００２０】また供給ノズル２および吸込みノズル３
は、鋼帯６の浸漬ロール７側の表面寄りに設けられてい
るので、鋼帯６の浸漬ロール７側の表面付近のドロスは
確実に除去される。前記鋼帯６の浸漬ロール７側の表面
は、溶融めっき金属５中に浸漬され、浸漬ロール７に巻
掛けられて走行するときには、浸漬ロール７と接触する
ので、前記鋼帯６の浸漬ロール７側表面付近のスナウト
内ドロス除去によって、スナウト内ドロス４に起因する
押込疵などの表面欠陥の発生が防止される。一方鋼帯６
の他方の表面では、表面付近のスナウト内ドロス除去が
行われないけれども、スナウト１の形状上、アッシュが
付きにくく、スナウト内ドロス４が発生しにくい。ま
た、鋼帯６の他方の表面は浸漬ロール７と接触しないの
で、スナウト内ドロス４に起因する表面欠陥はほとんど
発生しない。なお本実施例では、窒素ガスなどの非酸化
性ガスを使用しないので、非酸化性ガスによって溶融め
っき金属蒸気が冷却され、ドロス生成量が増大するとい
う問題は生じない。Further, the supply nozzle 2 and the suction nozzle 3
Is provided near the surface of the steel strip 6 on the dipping roll 7 side, so that the dross near the surface of the steel strip 6 on the dipping roll 7 side is reliably removed. The surface of the steel strip 6 on the dipping roll 7 side is soaked in the hot dip metal 5 and when the steel strip 6 is wound around the dipping roll 7 and travels, the surface of the steel strip 6 comes into contact with the dipping roll 7. By removing the dross in the snout near the side surface, the occurrence of surface defects such as indentation defects due to the dross in the snout 4 is prevented. On the other hand, steel strip 6
On the other surface, although the dross in the snout near the surface is not removed, due to the shape of the snout 1, ash is not easily attached and the dross in the snout 4 is less likely to occur. Further, since the other surface of the steel strip 6 does not come into contact with the dipping roll 7, surface defects due to the dross 4 inside the snout hardly occur. In this embodiment, since non-oxidizing gas such as nitrogen gas is not used, there is no problem that the non-oxidizing gas cools the hot-dip galvanized metal vapor and increases the amount of dross produced.
【００２１】図６は、図１に示す第２上下位置調整手段
の簡略化された構成を示す側面図である。第２上下位置
調整手段１６は、スクリュー２１と、ナット２２とを含
んで構成される。スクリュー２１は、鉛直軸線を有して
おり、その両端部付近は図示しない軸受によって回転自
在に支持されている。軸受は、ブラケット２３，２４に
嵌合されており、ブラケット２３，２４は、フレーム２
５に固定されている。またスクリュー２１の上端部に
は、ハンドル３０が設けられている。ナット２２は、ス
クリュー２１に噛み合っており、スクリュー２１の回転
方向に応じて上下方向に昇降する。ナット２２の上面に
は、連結アーム２６の一端部が固定されており、連結ア
ーム２６の他端部は、吸込みポンプ１４に固定されてい
る。FIG. 6 is a side view showing a simplified structure of the second vertical position adjusting means shown in FIG. The second vertical position adjusting means 16 includes a screw 21 and a nut 22. The screw 21 has a vertical axis, and both ends thereof are rotatably supported by bearings (not shown). The bearing is fitted in the brackets 23 and 24, and the brackets 23 and 24 are the frame 2
It is fixed at 5. A handle 30 is provided at the upper end of the screw 21. The nut 22 meshes with the screw 21 and moves up and down in accordance with the rotation direction of the screw 21. One end of the connecting arm 26 is fixed to the upper surface of the nut 22, and the other end of the connecting arm 26 is fixed to the suction pump 14.
【００２２】このため第２位置調整手段１６は、ハンド
ル３０を手動で回してスクリュー２３を回転させ、ナッ
ト２２を上下方向に昇降させることによって、連結アー
ム２６を介して吸込みポンプ１４の上下位置の調整を行
うことができる。なお前述のように吸込み手段である吸
込みノズル３、吸込み管路１２および吸込みポンプ１４
は相互に連結されているので、第２位置調整手段１６は
前記吸込み手段の上下位置の調整を一体的に行うことが
できる。したがって第２位置調整手段１６は、スナウト
１内の溶融めっき金属５の浴面およびドロス厚さが変動
しても、それに同調して吸込み手段の上下位置を調整す
ることができるので、スナウト内ドロス４は確実に吸込
みノズル３から吸込まれスナウト外に排出される。なお
溶融めっき操業中における前記浴面の変動量は、たとえ
ば±２０ｍｍである。For this reason, the second position adjusting means 16 manually turns the handle 30 to rotate the screw 23 and move the nut 22 up and down to move the suction pump 14 up and down via the connecting arm 26. Adjustments can be made. As described above, the suction nozzle 3, the suction pipe line 12, and the suction pump 14 which are the suction means.
Are mutually connected, the second position adjusting means 16 can integrally adjust the vertical position of the suction means. Therefore, the second position adjusting means 16 can adjust the vertical position of the suction means in synchronization with the change in the bath surface and the dross thickness of the hot-dip metal 5 in the snout 1, so that the dross in the snout can be adjusted. 4 is reliably sucked from the suction nozzle 3 and discharged to the outside of the snout. The amount of fluctuation of the bath surface during the hot dip plating operation is, for example, ± 20 mm.
【００２３】第１上下位置調整手段１５の構成は、前記
第２上下位置調整手段１６の構成と全く同一であり、供
給手段である供給ノズル２、供給管路１１および供給ポ
ンプ１３の上下位置の調整を一体的に行うことができ
る。したがって第１上下位置調整手段１５は、スナウト
１内の溶融めっき金属５の浴面が変動しても、それに同
調して、上下位置を調整し、供給ノズル２から吸込みノ
ズル３への溶融めっき金属５の流れを常に適正に形成す
ることができる。なお吸込みノズル３は、スナウト内ド
ロス４を確実に吸込むために正確に浴面変動と同調させ
て上下位置を調整する必要があるけれども、供給ノズル
２は適正な前記流れを形成することができればよいの
で、吸込みノズル３ほど正確に上下位置を調整する必要
がない。本実施例では、供給ノズル２と吸込みノズル３
との上下位置調整を個別に行うことができるので、この
ような調整レベルの差にも的確に対応することができ
る。The structure of the first vertical position adjusting means 15 is exactly the same as that of the second vertical position adjusting means 16, and the upper and lower positions of the supply nozzle 2, the supply pipeline 11 and the supply pump 13 which are the supplying means. Adjustment can be performed integrally. Therefore, the first vertical position adjusting means 15 adjusts the vertical position in synchronism with the fluctuation of the bath surface of the hot-dip metal 5 in the snout 1, and adjusts the vertical position so that the hot-dip metal from the supply nozzle 2 to the suction nozzle 3 is adjusted. The flow of 5 can always be formed properly. The suction nozzle 3 needs to be accurately synchronized with the fluctuation of the bath surface to adjust the vertical position in order to reliably suck the dross 4 in the snout, but the supply nozzle 2 is only required to be able to form the proper flow. The vertical position need not be adjusted as accurately as the suction nozzle 3. In this embodiment, the supply nozzle 2 and the suction nozzle 3
Since it is possible to individually adjust the upper and lower positions of and, it is possible to accurately cope with such a difference in the adjustment level.
【００２４】再び図１〜図３を参照して、吸込み管路１
２の吸込みノズル３に連なる上下に延びる部分１２ａ
は、スナウト１の吸込み管路１２を臨む内周面に平行に
延び、軸線方向に一様な外形を有している。また供給管
路１１の供給ノズル２に連なる上下に延びる部分１１ａ
も同様にスナウト１の供給管路１１を臨む内周面に平行
に延び、軸線方向に一様な外形を有している。このため
第１上下位置調整手段１５および第２上下位置調整手段
１６の上下位置調整の上昇時に、供給管路１１および吸
込み管路１２がスナウト１内において上昇しすぎて、ス
ナウト１に接触しても、スナウト１の内周面と線接触す
るので、スナウト１に傷を付けるおそれがない。Referring again to FIGS. 1 to 3, the suction line 1
A vertically extending portion 12a connected to the suction nozzle 3 of FIG.
Extends parallel to the inner peripheral surface of the snout 1 that faces the suction conduit 12, and has a uniform outer shape in the axial direction. Further, a vertically extending portion 11a of the supply pipe line 11 which is continuous with the supply nozzle 2
Also extends parallel to the inner peripheral surface of the snout 1 facing the supply pipe line 11 and has a uniform outer shape in the axial direction. Therefore, when the vertical position adjustments of the first vertical position adjusting means 15 and the second vertical position adjusting means 16 are raised, the supply pipe line 11 and the suction pipe line 12 rise too much in the snout 1 and come into contact with the snout 1. Also, since there is line contact with the inner peripheral surface of the snout 1, there is no risk of scratching the snout 1.
【００２５】またスナウト１には、浸漬ロール７の軸線
方向の両側部に第１覗き窓３１および第２覗き窓３２が
設けられている。第１覗き窓３１および第２覗き窓３２
は、透光性部材である耐熱ガラス３３で覆われており、
鋼帯６の溶融めっき金属５への浸漬位置付近を観察する
ことができる。第１覗き窓３１の視野は、ほぼ鋼帯６の
板幅中央から一端部寄りの領域Ｗ１であり、吸込みノズ
ル３を観察することができる。第２覗き窓３２の視野
は、ほぼ鋼帯６の板幅中央から他端部寄りの領域Ｗ２で
あり、供給ノズル２を観察することができる。Further, the snout 1 is provided with a first viewing window 31 and a second viewing window 32 on both sides of the dipping roll 7 in the axial direction. First peep window 31 and second peep window 32
Is covered with heat-resistant glass 33 which is a translucent member,
It is possible to observe the vicinity of the dipping position of the steel strip 6 in the hot-dip metal 5. The field of view of the first peep window 31 is a region W1 near the one end from the plate width center of the steel strip 6, and the suction nozzle 3 can be observed. The field of view of the second viewing window 32 is a region W2 near the other end from the center of the plate width of the steel strip 6, and the supply nozzle 2 can be observed.
【００２６】本実施例においては、スナウト内ドロス４
の除去は鋼帯６の溶融めっき中に次のような方法で行わ
れる。前述のように、鋼帯６は還元焼鈍炉８からスナウ
ト１を経て溶融めっき金属５中に浸漬され、浸漬ロール
７に巻掛けられて走行し、溶融めっきされる。スナウト
内ドロス４を除去するに際して、第１ステップでは供給
ノズル２および吸込みノズル３の上下位置が調整され
る。供給ノズル２の上下位置の調整は、第２覗き窓３２
から供給ノズル２を観察しながら、供給ノズル２の上下
位置が適正位置になるように第１上下位置調整手段１５
のハンドル３０を回すことによって行われる。吸込みノ
ズル３の上下位置の調整は、第１覗き窓３１から吸込み
ノズル３を観察しながら第２上下位置調整手段１５を用
いて同様に行われる。In this embodiment, the dross 4 in the snout is
Is removed by the following method during hot dipping of the steel strip 6. As described above, the steel strip 6 is immersed in the hot-dip galvanized metal 5 from the reduction annealing furnace 8 through the snout 1 and wound around the dipping roll 7 to run and be hot-dipped. When removing the dross 4 in the snout, the upper and lower positions of the supply nozzle 2 and the suction nozzle 3 are adjusted in the first step. The adjustment of the vertical position of the supply nozzle 2 is performed by the second observation window 32.
While observing the supply nozzle 2 from above, the first vertical position adjusting means 15 is arranged so that the vertical position of the supply nozzle 2 becomes an appropriate position.
This is done by turning the handle 30 of the. The adjustment of the vertical position of the suction nozzle 3 is similarly performed by using the second vertical position adjusting means 15 while observing the suction nozzle 3 through the first observation window 31.
【００２７】第２ステップでは、供給ポンプ１３を駆動
してスナウト１外部の溶融めっき金属５を圧送し、供給
ノズル２から噴流させる。供給ノズル２から噴流する溶
融めっき金属５の供給量は、スナウト内ドロス４を移動
集積させるために２００ｋｇ／ｍｉｎ以上であることが
好ましい。これによって供給ノズル２から鋼帯６の板幅
方向に沿って吸込みノズル３に向かう矢符２８方向の溶
融めっき金属５の流れが形成されるので、スナウト１内
の浴面上に浮遊しているスナウト内ドロス４を吸込みノ
ズル３近辺に移動集積させることができる。In the second step, the supply pump 13 is driven to pressure-feed the molten plated metal 5 outside the snout 1, and the molten metal 5 is jetted from the supply nozzle 2. The supply amount of the molten plated metal 5 jetted from the supply nozzle 2 is preferably 200 kg / min or more for moving and accumulating the dross 4 in the snout. As a result, a flow of the hot-dip galvanized metal 5 from the supply nozzle 2 along the plate width direction of the steel strip 6 toward the suction nozzle 3 in the direction of the arrow 28 is formed, so that it floats on the bath surface in the snout 1. The dross 4 in the snout can be moved and accumulated in the vicinity of the suction nozzle 3.
【００２８】第３ステップでは、吸込みポンプ１４を駆
動してスナウト内ドロス４を吸込みノズル３から溶融め
っき金属５とともに吸込み、スナウト１の外部に貯留さ
れている溶融めっき金属５中へ排出する。吸込みノズル
３から吸込まれるスナウト内ドロス４と溶融めっき金属
５との吸込み量は、適正な流れを形成するために２００
ｋｇ／ｍｉｎ以上であることが好ましい。スナウト１内
から排出除去されたスナウト内ドロス４は、溶融めっき
金属５の浴面上に浮遊するドロス２７に吸収され、図１
に示すように作業者２９によって汲み出される。なお溶
融めっき金属５の浴面上に堰を形成して、スナウト１内
から排出されたスナウト内ドロス４を堰内に導くように
してもよい。In the third step, the suction pump 14 is driven to suck the dross 4 in the snout from the suction nozzle 3 together with the hot-dip galvanized metal 5 and discharge it into the hot-dip galvanized metal 5 stored outside the snout 1. The suction amount of the dross in the snout 4 and the hot-dip galvanized metal 5 sucked from the suction nozzle 3 is 200 in order to form a proper flow.
It is preferably at least kg / min. The in-snow dross 4 discharged and removed from the inside of the snout 1 is absorbed by the dross 27 floating on the bath surface of the hot-dip metal 5,
It is pumped out by the operator 29 as shown in FIG. A weir may be formed on the bath surface of the hot-dip metal 5 so that the dross in the snout 4 discharged from the snout 1 is guided into the weir.
【００２９】前記第２ステップおよび第３ステップ実施
中、供給ノズル２および吸込みノズル３の上下位置調整
が適宜行われる。上下位置調整方法は前記第１ステップ
と同様である。前述のように吸込みノズル３の上下位置
は、ドロス４を確実に吸込むために供給ノズル２よりも
正確に浴面変動と同調させる必要があるので、吸込みノ
ズル３の上下位置調整回数は供給ノズル２よりも多くな
る。During the execution of the second step and the third step, the vertical positions of the supply nozzle 2 and the suction nozzle 3 are adjusted appropriately. The vertical position adjustment method is the same as in the first step. As described above, the vertical position of the suction nozzle 3 needs to be more accurately synchronized with the fluctuation of the bath surface than the supply nozzle 2 in order to reliably suck the dross 4. Therefore, the vertical position of the suction nozzle 3 is adjusted more than the supply nozzle 2. Also increases.
【００３０】このように本実施例では、スナウト内ドロ
ス４の除去を効率的かつ確実に行うことができる。また
スナウト内ドロス４の除去を溶融めっき操業中に行うこ
とができるので、スナウト内ドロスを除去するための設
備休止が不要である。As described above, in this embodiment, the removal of the dross 4 in the snout can be performed efficiently and reliably. Further, since the dross 4 in the snout can be removed during the hot dip plating operation, it is not necessary to suspend the equipment for removing the dross in the snout.
【００３１】[0031]
【発明の効果】以上のように本発明によれば、溶融めっ
き金属の流れの形成によってスナウト内ドロスの除去が
効率的かつ確実に行われるので、めっきされるべき鋼帯
へのドロスの付着が少なくなり、ドロスに起因するめっ
き欠陥の発生が大幅に低減される。また冷却効果を有す
る非酸化性ガスを使用しないので、非酸化性ガスによっ
て溶融めっき金属蒸気が冷却されドロス生成量が増大す
るという問題が解消される。このため溶融めっき鋼帯の
表面品質および製造歩留りが大幅に向上する。As described above, according to the present invention, the dross in the snout can be efficiently and reliably removed by forming the flow of the hot-dip metal, so that the dross can be attached to the steel strip to be plated. As a result, the number of plating defects caused by dross is significantly reduced. Further, since no non-oxidizing gas having a cooling effect is used, the problem that the non-oxidizing gas cools the hot-dip galvanized metal vapor to increase the amount of dross generated is solved. Therefore, the surface quality of the hot-dip steel strip and the production yield are significantly improved.
【００３２】また本発明によれば、スナウト内ドロスが
鋼帯の浸漬ロール側の表面寄りで確実に除去されるの
で、鋼帯が浸漬ロールに巻掛けられて走行するとき、ス
ナウト内ドロスが浸漬ロールによって鋼帯上に押込まれ
て表面欠陥が発生するという問題が解消される。またス
ナウト内ドロスの除去装置は、連続溶融めっき設備の操
業中にスナウト内ドロスの除去を効率的かつ確実に行う
ことができるので、操業を停止してスナウト内ドロスの
除去を行う必要がなくなり、連続溶融めっき設備の稼働
率および生産性が大幅に向上する。Further, according to the present invention, since the dross inside the snout is surely removed near the surface of the steel strip on the dipping roll side, when the steel strip is wound around the dipping roll and travels, the dross inside the snout is dipped. The problem that the roll is pressed onto the steel strip to cause surface defects is solved. Further, the device for removing dross in the snout can efficiently and reliably remove the dross in the snout during the operation of the continuous hot-dip galvanizing equipment, so it is not necessary to stop the operation to remove the dross in the snout, The operating rate and productivity of continuous hot dip plating equipment are greatly improved.
【００３３】また本発明によれば、スナウト内ドロスの
除去装置は供給ノズルと吸込みノズルとの上下位置調整
を行うことができるので、スナウト内の溶融めっき金属
の浴面およびスナウト内ドロスの厚さが変動しても、そ
れに同調して上下位置を最適位置に調整することができ
る。また供給ノズルと吸込みノズルとの上下位置調整を
個別に行うことができるので、供給ノズルよりも正確な
上下位置調整が必要である吸込みノズルの上下位置を供
給ノズルとは別個に最適位置に調整することができる。Further, according to the present invention, since the device for removing dross in the snout can adjust the vertical position of the supply nozzle and the suction nozzle, the bath surface of the hot-dip metal in the snout and the thickness of the dross in the snout can be adjusted. Even if fluctuates, the vertical position can be adjusted to the optimum position in synchronization with it. Further, since the vertical positions of the supply nozzle and the suction nozzle can be adjusted individually, it is necessary to adjust the vertical position more accurately than the supply nozzle. The vertical position of the suction nozzle is adjusted to the optimum position separately from the supply nozzle. be able to.
【００３４】また本発明によれば、供給ノズルの開口部
は鋼帯表面に平行な軸線を有しているので、供給ノズル
の開口部から吸込みノズルの開口部に向かう溶融めっき
金属の流れが確実に形成される。また吸込みノズルの開
口部は上下に延びる筒体を斜め下方に分断した形状を有
しているので、開口部の高さ方向の寸法が大きくなり、
スナウト内ドロスの上下方向位置が変動してもスナウト
内ドロスを確実に吸込むことが可能となる。Further, according to the present invention, since the opening of the supply nozzle has an axis parallel to the surface of the steel strip, the flow of the hot-dip metal from the opening of the supply nozzle to the opening of the suction nozzle is sure. Is formed. Further, since the opening of the suction nozzle has a shape in which a vertically extending cylindrical body is divided obliquely downward, the dimension in the height direction of the opening becomes large,
Even if the vertical position of the dross in the snout fluctuates, the dross in the snout can be reliably sucked.
【００３５】また本発明によれば、スナウト内において
供給管路および吸込み管路は、スナウトに平行に設けら
れている。このためそれらの上下位置調整の上昇時に上
昇しすぎてスナウトに接触しても、スナウトの内周面と
線接触するので、スナウトに傷を付けるおそれがない。
このためスナウトの耐久性が向上する。Further, according to the present invention, in the snout, the supply pipe line and the suction pipe line are provided parallel to the snout. For this reason, even if the snout is raised too much and comes into contact with the snout when the vertical position is adjusted, the snout is not injured because the line contact is made with the inner peripheral surface of the snout.
Therefore, the durability of the snout is improved.
【００３６】また本発明によれば、スナウト２には覗き
窓が配置されているので、スナウト内のドロスの状況を
観察することが可能であり、供給ノズルおよび吸込みノ
ズルの上下位置調整を適正に行うことができる。Further, according to the present invention, since the peep window is arranged in the snout 2, it is possible to observe the condition of the dross in the snout, and it is possible to properly adjust the vertical positions of the supply nozzle and the suction nozzle. It can be carried out.
【図１】本発明の一実施例であるスナウト内ドロスの除
去装置の簡略化された構成を示す側面図である。FIG. 1 is a side view showing a simplified configuration of a device for removing dross in snout, which is an embodiment of the present invention.
【図２】図１に示すスナウト内ドロスの除去装置の正面
図である。FIG. 2 is a front view of the device for removing dross in the snout shown in FIG.
【図３】図１に示すスナウト内ドロスの除去装置の切断
面線ＩＩＩ−ＩＩＩから見た平面図である。FIG. 3 is a plan view of the device for removing dross in snout shown in FIG. 1, taken along section line III-III.
【図４】供給ノズルの開口部の簡略化された構成を示す
斜視図である。FIG. 4 is a perspective view showing a simplified configuration of an opening of a supply nozzle.
【図５】吸込みノズルの開口部の簡略化された構成を示
す斜視図である。FIG. 5 is a perspective view showing a simplified configuration of the opening of the suction nozzle.
【図６】図１に示す第２上下位置調整手段の簡略化され
た構成を示す側面図である。6 is a side view showing a simplified configuration of a second vertical position adjusting means shown in FIG.
【図７】従来からの連続溶融めっき設備のスナウト近辺
の簡略化された構成を示す側面図である。FIG. 7 is a side view showing a simplified structure in the vicinity of a snout of a conventional continuous hot-dip galvanizing facility.
１ スナウト ２ 供給ノズル ３ 吸込みノズル ４ スナウト内ドロス １０ スナウト内ドロスの除去装置 １３ 供給ポンプ １４ 吸込みポンプ １６ 第１上下位置調整手段 １７ 第２上下位置調整手段 1 Snout 2 Supply Nozzle 3 Suction Nozzle 4 Snout Dross 10 Removal Device for Snout Dross 13 Supply Pump 14 Suction Pump 16 First Vertical Position Adjusting Means 17 Second Vertical Position Adjusting Means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田頭 憲 大阪府堺市石津西町５番地 日新製鋼株式 会社堺製造所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Tagashira 5 Ishizu Nishimachi, Sakai City, Osaka Prefecture Nisshin Steel Co., Ltd. Sakai Works
Claims (6)
配置されている浸漬ロールに、鋼帯を、溶融めっき金属
の上部付近に部分的に浸漬されるスナウト内を経て巻掛
けて走行させ、鋼帯表面をめっきする連続溶融めっきに
おけるスナウト内ドロスの除去方法において、 スナウト内で溶融めっき金属をその浴面付近に設けられ
る供給ノズルから供給し、供給ノズルから間隔をあけて
配置された吸込みノズルから溶融めっき金属の浴面付近
のドロスを吸込み、スナウトの外方に導くことを特徴と
する連続溶融めっきにおけるスナウト内ドロスの除去方
法。1. A steel strip is wound around a dipping roll arranged in a storage tank in which the hot-dip galvanized metal is stored, through a snout partially dipped near the upper portion of the hot-dip galvanized metal. In the method of removing dross in the snout in continuous hot dip plating for plating the surface of the steel strip, the hot dip metal is supplied from the supply nozzle provided near the bath surface in the snout, and suction is provided at a distance from the supply nozzle. A method for removing dross in a snout in continuous hot dip plating, which comprises sucking dross near the bath surface of the hot dip metal from a nozzle and guiding the dross to the outside of the snout.
配置されている浸漬ロールに、鋼帯を、溶融めっき金属
の上部付近に部分的に浸漬されるスナウト内を経て巻掛
けて走行させ、鋼帯表面をめっきする連続溶融めっきに
おけるスナウト内ドロスの除去装置において、 スナウト内の浴面付近で、めっきされるべき鋼帯の浸漬
ロール側の表面寄りで、鋼帯の幅方向の一外側方で前記
幅方向内方に開口する供給ノズルと、 スナウト内の浴面付近で、めっきされるべき鋼帯の浸漬
ロール側の表面寄りで、鋼帯の幅方向の他外側方で前記
幅方向内方に前記供給ノズルに対向して開口する吸込み
ノズルと、 一端部が供給ノズルを形成し、スナウト外部に延びる供
給管路と、 供給管路の他端部に設けられ、貯留槽内におけるスナウ
ト外部の溶融めっき金属を供給ノズルに供給する供給ポ
ンプと、 一端部が吸込みノズルを形成し、スナウト外部に延びる
吸込み管路と、 吸込み管路の他端部に設けられ、スナウト内の浴面付近
のドロスを吸込み、スナウト外部の貯留槽内に排出する
吸込みポンプとを含むことを特徴とする連続溶融めっき
におけるスナウト内ドロスの除去装置。2. A steel strip is wound around a dipping roll, which is arranged in a storage tank in which the hot-dip galvanized metal is stored, through a snout which is partially dipped near the upper portion of the hot-dip galvanized metal. In a device for removing dross in a snout in continuous hot dip galvanizing the surface of a steel strip, near the bath surface in the snout, near the surface of the steel strip to be plated, on the dipping roll side, and one outside in the width direction of the steel strip. In the width direction inward, near the bath surface in the snout, near the surface of the steel strip to be plated on the dipping roll side, and in the width direction outside the width direction of the steel strip. A suction nozzle that opens inwardly facing the supply nozzle, a supply pipe having one end forming a supply nozzle and extending to the outside of the snout, and a suction pipe provided at the other end of the supply pipe and provided in the storage tank. External hot dip A supply pump for supplying metal to the supply nozzle, a suction pipe line having one end forming a suction nozzle and extending to the outside of the snout, and a suction pipe line provided at the other end of the suction pipe for sucking the dross near the bath surface in the snout. And a suction pump for discharging into a storage tank outside the snout, a device for removing dross in the snout in continuous hot dip plating.
とを一体的に上下に変位して上下の位置を調整する第１
上下位置調整手段と、 吸込みノズルと、吸込み管路と、吸込みポンプとを一体
的に上下に変位して上下の位置を調整する第２上下位置
調整手段とを含むことを特徴とする請求項２記載のスナ
ウト内ドロスの除去装置。3. A first nozzle for integrally displacing a supply nozzle, a supply pipe, and a supply pump up and down to adjust the vertical position.
3. A vertical position adjusting means, a suction nozzle, a suction pipe line, and a second vertical position adjusting means for vertically shifting the suction pump integrally with each other to adjust the vertical position. The device for removing dross in the snout described.
ールの軸線に平行な軸線を有し、 吸込みノズルの開口部は、上下に延びる筒体をその上下
の軸線に対して傾斜した仮想平面内で分断した形状を有
することを特徴とする請求項２または３記載のスナウト
内ドロスの除去装置。4. The opening of the supply nozzle has an axis which is horizontal and parallel to the axis of the dipping roll, and the opening of the suction nozzle has an imaginary plane in which a vertically extending cylindrical body is inclined with respect to the upper and lower axes thereof. The device for removing dross in snout according to claim 2 or 3, wherein the device has a shape that is divided inside.
びる部分は、スナウトの供給管路を臨む内周面に平行に
延び、軸線方向に一様な外形を有し、 吸込み管路の吸込みノズルに連なる上下に延びる部分
は、スナウトの吸込み管路を臨む内周面に平行に延び、
軸線方向に一様な外形を有することを特徴とする請求項
２〜４のいずれかに記載のスナウト内ドロスの除去装
置。5. A vertically extending portion of the supply pipe, which is continuous with the supply nozzle, extends parallel to an inner peripheral surface of the snout facing the supply pipe, and has a uniform outer shape in the axial direction. The vertically extending part connected to the nozzle extends parallel to the inner peripheral surface facing the suction pipe line of the snout,
The device for removing dross in snout according to any one of claims 2 to 4, wherein the device has a uniform outer shape in the axial direction.
少なくとも一側部に鋼帯の溶融めっき金属への浸漬位置
付近を見るための透光性部材で覆われた覗き窓が配置さ
れることを特徴とする請求項２〜５のいずれかに記載の
スナウト内ドロスの除去装置。6. The snout is provided with a peep window covered with a translucent member for viewing the vicinity of the dipping position of the steel strip in the hot dip metal on at least one side in the axial direction of the dipping roll. The device for removing dross in a snout according to any one of claims 2 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7640895A JPH08269659A (en) | 1995-03-31 | 1995-03-31 | Method and device for removing dross in snout in continuous hot dipping bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7640895A JPH08269659A (en) | 1995-03-31 | 1995-03-31 | Method and device for removing dross in snout in continuous hot dipping bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08269659A true JPH08269659A (en) | 1996-10-15 |
Family
ID=13604430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7640895A Withdrawn JPH08269659A (en) | 1995-03-31 | 1995-03-31 | Method and device for removing dross in snout in continuous hot dipping bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08269659A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1161370A (en) * | 1997-08-27 | 1999-03-05 | Nippon Steel Corp | Method and device for hot dipping |
| US5961285A (en) * | 1996-06-19 | 1999-10-05 | Ak Steel Corporation | Method and apparatus for removing bottom dross from molten zinc during galvannealing or galvanizing |
| JPH11279726A (en) * | 1998-03-26 | 1999-10-12 | Kawasaki Steel Corp | Continuous hot dip metal plating method and apparatus therefor |
| JP2000328225A (en) * | 1999-05-17 | 2000-11-28 | Dowa Mining Co Ltd | Surface treatment and treating vessel used for the method |
| JP2001335906A (en) * | 2000-05-26 | 2001-12-07 | Nippon Steel Hardfacing Co Ltd | Device for removing foreign matter in snout |
| KR20040006530A (en) * | 2002-07-12 | 2004-01-24 | 주식회사 포스코 | Ash removal apparatus of the inside snout for coating bath |
| JP2007146240A (en) * | 2005-11-29 | 2007-06-14 | Nisshin Steel Co Ltd | Method and device for cleaning snout in hot-dip plating |
| JP2008024970A (en) * | 2006-07-19 | 2008-02-07 | Nippon Steel Corp | Method of manufacturing galvanized steel sheet having excellent appearance |
| JP2008095207A (en) * | 1998-04-01 | 2008-04-24 | Jfe Steel Kk | Method for hot-dip galvanizing and apparatus for the same |
| JP2012149295A (en) * | 2011-01-18 | 2012-08-09 | Jfe Steel Corp | Device for removing foreign matter in snout and method for removing the foreign matter |
| JP2014065950A (en) * | 2012-09-27 | 2014-04-17 | Jfe Steel Corp | Discharge device for foreign substance in snout |
| JP2014114484A (en) * | 2012-12-10 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Snout floating scum removal device for molten zinc plating line |
| JP2014114483A (en) * | 2012-12-10 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Snout floating scum removal device for molten zinc plating line |
| JP2018178156A (en) * | 2017-04-05 | 2018-11-15 | 新日鐵住金株式会社 | Molten metal plating apparatus and molten metal plating method |
| WO2021130422A1 (en) * | 2019-12-26 | 2021-07-01 | Fives Stein | Device for removing mattes from the surface of a liquid metal bath inside a duct of a line for continuously coating a metal strip |
| CN113966407A (en) * | 2019-05-08 | 2022-01-21 | Sms集团有限公司 | Method and device for flushing an overflow chamber at the bath-side end of a snout of a hot-dip coating installation |
-
1995
- 1995-03-31 JP JP7640895A patent/JPH08269659A/en not_active Withdrawn
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5961285A (en) * | 1996-06-19 | 1999-10-05 | Ak Steel Corporation | Method and apparatus for removing bottom dross from molten zinc during galvannealing or galvanizing |
| JPH1161370A (en) * | 1997-08-27 | 1999-03-05 | Nippon Steel Corp | Method and device for hot dipping |
| JPH11279726A (en) * | 1998-03-26 | 1999-10-12 | Kawasaki Steel Corp | Continuous hot dip metal plating method and apparatus therefor |
| JP2008095207A (en) * | 1998-04-01 | 2008-04-24 | Jfe Steel Kk | Method for hot-dip galvanizing and apparatus for the same |
| JP2000328225A (en) * | 1999-05-17 | 2000-11-28 | Dowa Mining Co Ltd | Surface treatment and treating vessel used for the method |
| JP2001335906A (en) * | 2000-05-26 | 2001-12-07 | Nippon Steel Hardfacing Co Ltd | Device for removing foreign matter in snout |
| KR20040006530A (en) * | 2002-07-12 | 2004-01-24 | 주식회사 포스코 | Ash removal apparatus of the inside snout for coating bath |
| JP2007146240A (en) * | 2005-11-29 | 2007-06-14 | Nisshin Steel Co Ltd | Method and device for cleaning snout in hot-dip plating |
| JP2008024970A (en) * | 2006-07-19 | 2008-02-07 | Nippon Steel Corp | Method of manufacturing galvanized steel sheet having excellent appearance |
| JP2012149295A (en) * | 2011-01-18 | 2012-08-09 | Jfe Steel Corp | Device for removing foreign matter in snout and method for removing the foreign matter |
| JP2014065950A (en) * | 2012-09-27 | 2014-04-17 | Jfe Steel Corp | Discharge device for foreign substance in snout |
| JP2014114484A (en) * | 2012-12-10 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Snout floating scum removal device for molten zinc plating line |
| JP2014114483A (en) * | 2012-12-10 | 2014-06-26 | Nippon Steel & Sumitomo Metal | Snout floating scum removal device for molten zinc plating line |
| JP2018178156A (en) * | 2017-04-05 | 2018-11-15 | 新日鐵住金株式会社 | Molten metal plating apparatus and molten metal plating method |
| CN113966407A (en) * | 2019-05-08 | 2022-01-21 | Sms集团有限公司 | Method and device for flushing an overflow chamber at the bath-side end of a snout of a hot-dip coating installation |
| CN113966407B (en) * | 2019-05-08 | 2023-10-27 | Sms集团有限公司 | Method and device for flushing an overflow chamber at the trough-side end of a furnace nose of a hot dip coating installation |
| US11850634B2 (en) | 2019-05-08 | 2023-12-26 | Sms Group Gmbh | Method and device for rinsing an overflow chamber at the bath-side end of a snout of a hot-dip coating device |
| WO2021130422A1 (en) * | 2019-12-26 | 2021-07-01 | Fives Stein | Device for removing mattes from the surface of a liquid metal bath inside a duct of a line for continuously coating a metal strip |
| FR3105796A1 (en) * | 2019-12-26 | 2021-07-02 | Fives Stein | DEVICE FOR THE EVACUATION OF MATTE FROM THE SURFACE OF A LIQUID METAL BATH INSIDE A BELL DESCENT OF A LINE OF CONTINUOUS COATING OF A METAL BAND |
| CN115003846A (en) * | 2019-12-26 | 2022-09-02 | 法孚斯坦因公司 | Device for removing matte from the surface of a liquid metal bath in a pipe for a wire for continuously coating a metal strip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020604 |