JP4500410B2 - Top dross discharge device in seal box in continuous hot dipping line - Google Patents
Top dross discharge device in seal box in continuous hot dipping line Download PDFInfo
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- JP4500410B2 JP4500410B2 JP2000106561A JP2000106561A JP4500410B2 JP 4500410 B2 JP4500410 B2 JP 4500410B2 JP 2000106561 A JP2000106561 A JP 2000106561A JP 2000106561 A JP2000106561 A JP 2000106561A JP 4500410 B2 JP4500410 B2 JP 4500410B2
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- dross
- seal box
- nozzle
- steel strip
- nozzle header
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Description
【０００１】
【発明の属する技術分野】
本発明は、連続式溶融メッキラインにおけるシールボックス内のトップドロス排出装置に関する。
【０００２】
【従来の技術】
連続式溶融金属メッキラインでは、メッキ浴槽内から上方に導出される鋼帯の立ち上がり部に、所定のメッキ付着量にコントロールするためにガスワイピングノズルが設置されている。このノズルのガス流体として、一般的に圧縮空気，燃焼排ガス，窒素等の非酸化性ガスが使用されている。そして、メッキの種類や付着量によっては、メッキ層表面に酸化皮膜が形成するのを防止するため、または、浴槽内の溶融金属が酸化してトップドロスが発生するのを低減するため、次のような手段がとられる。即ち、上面に鋼帯通過スリットを有したシールボックスにより、鋼帯とワイピングノズルとノズルヘッダーを同時にメッキ浴面上で覆い、シールボックス内部の酸素濃度を極めて低く保ちながら、ワイピングノズルから、窒素等の非酸化性ガスを吹き付けるのである。
【０００３】
【発明が解決しようとする課題】
しかしながら、なおまだトップドロスの発生を避けられず、長時間のライン操業では、トップドロスの量が増えて鋼帯へのドロス付着現象が発生する。このため、定期的にシールボックスを上昇（開放）させ、トップドロスを排出していたが、このとき、シールボックス内の酸素濃度が上がり、メッキ層表面への酸化皮膜の形成により、鋼帯メッキ表面肌の外観が損なわれるという問題があった。
【０００４】
本発明は上記課題を解決し、連続式溶融メッキラインにおいて、メッキ浴面上のシールボックス内に発生したトップドロスを回収する場合、シールボックスを上昇（開放）させることなく、シールボックス内のトップドロスを排出できる装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記課題を解決するため、本発明の構成は次のとおりとする。即ち、第１構成は、メッキ浴槽のメッキ液内に設置されたシンクロールに案内された鋼帯が、斜め上方から下方に導入されて上方に導出されるように構成され、液面直上で鋼帯を挟んで、ノズルヘッダーとガスワイピングノズルが対向し、前記鋼帯、ガスワイピングノズルおよびノズルヘッダーを同時に覆うようにシールボックスが設けられたものにおいて、前記ノズルヘッダーの下方には、ドロス収集用樋がシールボックス内部の液面を境に昇降するように設けられ、該ドロス収集用樋は前記ノズルヘッダーの長さ方向に平行で、該樋の長さ方向一方が高く、かつ、その高い方に堰があり、上昇時の前記樋に残されたトップドロスを樋の下端から受け取りシールボックス外に排出するよう、トップドロス排出ポンプが設けられたことである。
【０００６】
第２構成は、メッキ浴槽のメッキ液内に設置されたシンクロールに案内された鋼帯が、斜め上方から下方に導入されて上方に導出されるように構成され、液面直上で鋼帯を挟んで、ノズルヘッダーとガスワイピングノズルが対向し、前記鋼帯、ガスワイピングノズルおよびノズルヘッダーを同時に覆うようにシールボックスが設けられたものにおいて、前記ノズルヘッダーの下方には、ドロス収集用樋がシールボックス内部の液面を境に昇降するように設けられ、該ドロス収集用樋は前記ノズルヘッダーの長さ方向に平行で、該樋の長さ方向一方が高く、かつ、その高い方に堰があり、上昇時の前記樋に残されたトップドロスを樋の下端から受け取りシールボックス外に排出するよう、トップドロス排出ポンプが設けられ、該ドロス排出ポンプの吐出口がドロスから亜鉛を分離回収する亜鉛回収反応槽に臨んだことである。
【０００７】
【発明の実施の形態】
以下に本発明の実施態様を図面に示す一実施例にもとづき説明する。図１において、メッキ浴槽Ｐ1のメッキ液内に設置されたシンクロールＰ2に案内された鋼帯Ａが、斜め上方から下方に導入されて上方に導出されるように構成されている。そして、液面直上で鋼帯を挟んで、ノズルヘッダーＰ3のガスワイピングノズルが対向し、また、鋼帯ＡとガスワイピングノズルとノズルヘッダーＰ3を同時に覆うようにシールボックスＰ4が設けられている。そして、ノズルヘッダーＰ3の下方に、ドロス収集用樋１がシールボックス内部の液面を境に昇降するように設けられ、該ドロス収集用樋は前記ノズルヘッダーの長さ方向に平行で、該樋の長さ方向一方が高く、かつ、その高い方に堰１ｂがある。
【０００８】
前記ドロス収集樋１は、断面Ｕ字状の樋本体１ａを有し、これが樋昇降部２によって上下される。樋昇降部２において、メッキ浴槽Ｐ1の側壁上端に支持梁２ａが橋架され、これに油圧ピストンシリンダからなる往復駆動源２ｂが設置され、これのピストン棒の上端にＺ字状のアーム２ｃの一端が固定され、他端が浴液面より下方に浸漬して、前記樋本体１ａに固定される。また、上昇時の樋１に残されたトップドロスを吸入するようにドロス排出ポンプ３が設けられる。
【０００９】
以上において作動状態を説明する。通常の鋼帯メッキ運転中は、樋１は下降状態にあり、図１の点線で示すように、メッキ浴面下に位置した状態を保っている。シールボックス内液面上にたまったトップドロスを排出する場合は、樋１を上昇させ図２に示す状態とし、樋１内にあるトップドロスを樋の高い方から低い方へ重力で流下させる。そして、ドロス排出ポンプ３でシールボックス外へ排出される。
【００１０】
ドロス排出作業の終了後は、樋１は、下降されて再びメッキ浴面下に位置した状態とされる。
【００１１】
図３は、他の実施例を示し、ドロス排出ポンプ３の吐出口がドロスから亜鉛を分離回収する亜鉛回収反応槽４に臨む。亜鉛回収反応槽４は、浴液面下に浸漬保持された槽体４ａ内に撹拌機４ｂが設けられてなり、上端から塩化アンモニウム等の薬剤が投入される。ここで、ドロスは薬剤と反応して亜鉛が分離回収される。回収された亜鉛液は槽体の下部の隙間から浴槽に戻る。
【００１２】
本発明は前記した実施例や実施態様に限定されず、特許請求の精神および範囲を逸脱せずに種々の変形を含む。
【００１３】
【発明の効果】
本発明により、シールボックスを上昇（開放）させることなく、シールボックス内のトップドロスを排出できるようになり、トップドロス排出時もシールボックス内の酸素濃度が上昇せず、メッキ層表面に酸化皮膜が形成して表面肌の外観が損なわれることを防止できることとなった。また、本装置を用いて定期的にトップドロスを排出することで、ドロス引き現象も解消された。
【図面の簡単な説明】
【図１】 本発明の一実施例の概略正面図である。
【図２】 図１の要部Ｙ−Ｙ断面図である。
【図３】 本発明の他の実施例の縦断面図である。
【符号の説明】
Ａ 鋼帯
Ｐ1 メッキ浴槽
Ｐ2 シンクロール
Ｐ3 ノズルヘッダー
Ｐ4 シールボックス
１ ドロス収集樋
１ａ 樋本体
１ｂ 堰
２ 樋昇降部
２ａ 支持梁
２ｂ 往復駆動源
２ｃ アーム
３ ドロス排出ポンプ
４ 亜鉛回収反応槽
４ａ 槽体
４ｂ 撹拌機[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a top dross discharge device in a seal box in a continuous hot dip plating line.
[0002]
[Prior art]
In the continuous molten metal plating line, a gas wiping nozzle is installed at a rising portion of a steel strip led upward from the inside of the plating bath in order to control a predetermined amount of plating adhesion. As the gas fluid of this nozzle, generally, non-oxidizing gas such as compressed air, combustion exhaust gas, and nitrogen is used. Depending on the type of plating and the amount of deposition, in order to prevent the formation of an oxide film on the surface of the plating layer, or to reduce the occurrence of top dross due to oxidation of the molten metal in the bath, the following Such measures are taken. That is, a steel box, a wiping nozzle, and a nozzle header are simultaneously covered on the plating bath surface by a seal box having a steel band passage slit on the upper surface, and the nitrogen concentration, etc. from the wiping nozzle while keeping the oxygen concentration inside the seal box extremely low. Of non-oxidizing gas.
[0003]
[Problems to be solved by the invention]
However, the generation of top dross is still unavoidable, and the amount of top dross increases and the dross adhesion phenomenon to the steel strip occurs during long line operation. For this reason, the seal box was periodically lifted (opened) and the top dross was discharged. At this time, the oxygen concentration in the seal box increased, and the formation of an oxide film on the surface of the plating layer resulted in steel strip plating. There was a problem that the appearance of the surface skin was impaired.
[0004]
The present invention solves the above-mentioned problems, and when collecting the top dross generated in the seal box on the plating bath surface in the continuous hot dipping line, the top in the seal box is not lifted (opened). It aims at providing the device which can discharge dross.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the configuration of the present invention is as follows. That is, the first configuration is configured such that the steel strip guided by the sink roll installed in the plating solution of the plating bath is introduced downward from the upper side and led out upward, and the steel strip is directly above the liquid level. A nozzle box and a gas wiping nozzle are opposed to each other across a band, and a seal box is provided so as to cover the steel band, the gas wiping nozzle and the nozzle header at the same time . A scissor is provided so as to rise and fall with the liquid level inside the seal box as a boundary, and the dross collecting scissors are parallel to the length direction of the nozzle header, one of the scissors in the length direction is high, and the higher to have weir, to discharge outside the receive seal box top dross left in the trough of the ascent from the bottom of the trough, is that the top-dross discharge pump is provided
[0006]
The second configuration is such that the steel strip guided by the sink roll installed in the plating solution of the plating bath is introduced obliquely from below and led out upward, and the steel strip is disposed immediately above the liquid surface. sandwiched therebetween, the nozzle header and the gas wiping nozzle is opposed, the steel strip, in which the sealing box to cover the gas wiping nozzle and the nozzle headers at the same time provided, on the lower side of the nozzle headers, is dross collection trough The dross collecting rod is parallel to the length direction of the nozzle header, one of the length directions of the rod is high, and a weir on the higher side. There is, so that discharged out of receiving the seal box top dross left in the trough of the ascent from the bottom of the trough, top dross discharge pump is provided, the dross discharge Pont The discharge opening is that that faces the zinc recovery reactor for separating and recovering the zinc from dross.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on an embodiment shown in the drawings. In FIG. 1, a steel strip A guided by a sink roll P 2 installed in a plating solution in a plating bath P 1 is configured to be introduced obliquely from below and led out upward. Then, across the steel strip just above the liquid surface, the gas wiping nozzle of the nozzle header P 3 are opposed, also, the sealing box P 4 is provided so as to cover the strip A and the gas wiping nozzle and the nozzle header P 3 at the same time ing. A dross collecting basket 1 is provided below the nozzle header P 3 so as to move up and down from the liquid level inside the seal box, and the dross collecting bowl is parallel to the length direction of the nozzle header, One side in the length direction of the ridge is high, and there is a weir 1b on the higher side.
[0008]
The dross collecting basket 1 has a bowl main body 1 a having a U-shaped cross section, which is moved up and down by a bowl lifting part 2. In trough elevating part 2, the support beam 2a on the side wall upper end of the plating bath P 1 is bridged, this reciprocal drive source 2b consisting of a hydraulic piston cylinder is installed, the Z-
[0009]
The operating state will be described above. During the normal steel strip plating operation, the ridge 1 is in a lowered state, and as shown by the dotted line in FIG. 1, is kept under the plating bath surface. When discharging the top dross accumulated on the liquid level in the seal box, the heel 1 is raised to the state shown in FIG. 2, and the top dross in the heel 1 is caused to flow down by gravity from the higher side of the heel to the lower side. Then, it is discharged out of the seal box by the dross discharge pump 3.
[0010]
After completion of the dross discharge operation, the basket 1 is lowered and is again positioned below the plating bath surface.
[0011]
FIG. 3 shows another embodiment, in which the discharge port of the dross discharge pump 3 faces the zinc recovery reaction tank 4 that separates and recovers zinc from the dross. The zinc recovery reaction tank 4 is provided with a stirrer 4b in a
[0012]
The present invention is not limited to the above-described embodiments and embodiments, but includes various modifications without departing from the spirit and scope of the claims.
[0013]
【The invention's effect】
According to the present invention, the top dross in the seal box can be discharged without raising (opening) the seal box, and the oxygen concentration in the seal box does not increase even when the top dross is discharged. It was possible to prevent the appearance of the surface skin from being damaged. Moreover, the dross pulling phenomenon was also eliminated by discharging the top dross regularly using this device.
[Brief description of the drawings]
FIG. 1 is a schematic front view of an embodiment of the present invention.
2 is a cross-sectional view taken along the line YY in FIG.
FIG. 3 is a longitudinal sectional view of another embodiment of the present invention.
[Explanation of symbols]
A Steel strip P 1 Plating bath P 2 Sink roll P 3 Nozzle header P 4 Seal box 1 Dross collection rod 1a 樋 Body 1b Weir 2 樋 Lifting / lowering portion 2a Support beam 2b Reciprocating
Claims (2)
前記ノズルヘッダーの下方には、ドロス収集用樋がシールボックス内部の液面を境に昇降するように設けられ、該ドロス収集用樋は前記ノズルヘッダーの長さ方向に平行で、該樋の長さ方向一方が高く、かつ、その高い方に堰があり、上昇時の前記樋に残されたトップドロスを樋の下端から受け取りシールボックス外に排出するよう、トップドロス排出ポンプが設けられたことを特徴とする連続式溶融メッキラインにおけるシールボックス内のトップドロス排出装置。The steel strip guided by the sink roll installed in the plating solution in the plating bath is constructed so that it is introduced obliquely from below and led out upward, and the nozzle header is sandwiched between the steel strip directly above the liquid level. And a gas wiping nozzle are opposed to each other, and a seal box is provided so as to cover the steel strip, the gas wiping nozzle and the nozzle header at the same time.
Below the nozzle header, a dross collecting basket is provided so as to rise and fall with the liquid level inside the seal box as a boundary, and the dross collecting basket is parallel to the length direction of the nozzle header, The top dross discharge pump was provided so that one side in the vertical direction was high, and there was a weir on the higher side, and the top dross left in the cage when it was raised was received from the lower end of the rod and discharged out of the seal box. A top dross discharge device in a seal box in a continuous hot dipping line.
前記ノズルヘッダーの下方には、ドロス収集用樋がシールボックス内部の液面を境に昇降するように設けられ、該ドロス収集用樋は前記ノズルヘッダーの長さ方向に平行で、該樋の長さ方向一方が高く、かつ、その高い方に堰があり、上昇時の前記樋に残されたトップドロスを樋の下端から受け取りシールボックス外に排出するよう、トップドロス排出ポンプが設けられ、該ドロス排出ポンプの吐出口がドロスから亜鉛を分離回収する亜鉛回収反応槽に臨んだことを特徴とする連続式溶融メッキラインにおけるシールボックス内のトップドロス排出装置。The steel strip guided by the sink roll installed in the plating solution in the plating bath is constructed so that it is introduced obliquely from below and led out upward, and the nozzle header is sandwiched between the steel strip directly above the liquid level. And a gas wiping nozzle are opposed to each other, and a seal box is provided so as to cover the steel strip, the gas wiping nozzle and the nozzle header at the same time.
Below the nozzle header, a dross collecting basket is provided so as to rise and fall with the liquid level inside the seal box as a boundary, and the dross collecting basket is parallel to the length direction of the nozzle header, A top dross discharge pump is provided to receive one of the top dross left in the ridge when it is raised from the lower end of the ridge and discharge it out of the seal box. A top dross discharge device in a seal box in a continuous hot dip plating line, wherein a discharge port of a dross discharge pump faces a zinc recovery reaction tank for separating and recovering zinc from dross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000106561A JP4500410B2 (en) | 2000-04-07 | 2000-04-07 | Top dross discharge device in seal box in continuous hot dipping line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000106561A JP4500410B2 (en) | 2000-04-07 | 2000-04-07 | Top dross discharge device in seal box in continuous hot dipping line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001295014A JP2001295014A (en) | 2001-10-26 |
| JP4500410B2 true JP4500410B2 (en) | 2010-07-14 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000106561A Expired - Fee Related JP4500410B2 (en) | 2000-04-07 | 2000-04-07 | Top dross discharge device in seal box in continuous hot dipping line |
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| Country | Link |
|---|---|
| JP (1) | JP4500410B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101461720B1 (en) * | 2012-10-26 | 2014-11-14 | 주식회사 포스코 | Apparatus for removing top dross on Zinc Surface of plating bath |
| KR101481606B1 (en) | 2012-12-20 | 2015-01-12 | 주식회사 포스코 | Galvanizing apparatus of steel sheet |
| CN108624832A (en) * | 2018-07-10 | 2018-10-09 | 河北首燕机械股份有限公司 | Inhibit and remove zinc gray device in hot galvanizing furnace nose |
| CN114703439B (en) * | 2022-04-12 | 2023-11-21 | 嘉兴康柏特表面科技股份有限公司 | High-tightness surface galvanization device for conical head driving screw |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211742A (en) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | Device for removing dross in snout for continuous molten metal plating |
| JPH04285148A (en) * | 1991-03-14 | 1992-10-09 | Kawasaki Steel Corp | Hot-dipping device |
| JPH0617214A (en) * | 1992-06-30 | 1994-01-25 | Kawasaki Steel Corp | Top dross removing device for continuous hot-dipping bath |
| JPH11279729A (en) * | 1998-03-27 | 1999-10-12 | Nisshin Steel Co Ltd | Device for recovering and reproducing hot-dipping metal in dross |
-
2000
- 2000-04-07 JP JP2000106561A patent/JP4500410B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211742A (en) * | 1988-06-29 | 1990-01-16 | Kawasaki Steel Corp | Device for removing dross in snout for continuous molten metal plating |
| JPH04285148A (en) * | 1991-03-14 | 1992-10-09 | Kawasaki Steel Corp | Hot-dipping device |
| JPH0617214A (en) * | 1992-06-30 | 1994-01-25 | Kawasaki Steel Corp | Top dross removing device for continuous hot-dipping bath |
| JPH11279729A (en) * | 1998-03-27 | 1999-10-12 | Nisshin Steel Co Ltd | Device for recovering and reproducing hot-dipping metal in dross |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001295014A (en) | 2001-10-26 |
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