JPH0892710A - Discharge of dross in galvanizing bath and device therefor - Google Patents

Discharge of dross in galvanizing bath and device therefor

Info

Publication number
JPH0892710A
JPH0892710A JP23147394A JP23147394A JPH0892710A JP H0892710 A JPH0892710 A JP H0892710A JP 23147394 A JP23147394 A JP 23147394A JP 23147394 A JP23147394 A JP 23147394A JP H0892710 A JPH0892710 A JP H0892710A
Authority
JP
Japan
Prior art keywords
dross
drum
plating bath
plating
pot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23147394A
Other languages
Japanese (ja)
Inventor
Ichiro Asahi
一郎 旭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP23147394A priority Critical patent/JPH0892710A/en
Publication of JPH0892710A publication Critical patent/JPH0892710A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To simplify an operation to discharge high-temp. dross and to prevent the degradation in plating quality and shortened life of plating equipment occurring in the dross by circulating a plating bath to a sub-pot and continuously separating and removing the dross in the bath by using magnetism. CONSTITUTION: The sub-pot 3 is installed in proximity to a plating cell and the plating bath Z in the plating cell is partly introduced by a ladling out pipe 4. The greater part of the lower side of a cylindrical drum 1 incorporating a magnet 12 on the inner side of the front surface is immersed into the plating bath Z in the sub-pot 3 and is rotatably disposed therein so as to have the dross adsorbed on the front surface of the drum 1. A straight scraper 2 is pressed to the front surface of the drum 1 together with rotation of the drum 1 to scrape down and discharge the adsorbed dross into a dross receiver 21. The top and bottom dross of the plating bath Z is dammed up by partition dams 31, 32 and only the clean plating bath is circulated from a route of an arrow C and a return pipe to the plating cell.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、鋼帯等の金属ストリッ
プに連続溶融亜鉛めっきを施すめっき装置におけるめっ
き浴中に発生するドロスを分離して浴外に排出する方法
およびその装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for separating dross generated in a plating bath in a plating apparatus for continuously galvanizing a metal strip such as a steel strip and discharging the dross out of the bath.

【0002】[0002]

【従来の技術】鋼帯等の金属ストリップに連続溶融亜鉛
めっきを施すめっき装置におけるめっき浴中において
は、鋼帯およびめっき浴中に配置されるシンクロール等
のロール類から溶出した鉄分、さらにめっき品質向上の
ためにめっき浴中に投入されるアルミニウムなどが亜鉛
と反応して、鉄−亜鉛(FeZn7)、鉄−アルミニウム(Fe
2Al5) 等の金属間化合物を主成分とするドロスが生成さ
れる。
2. Description of the Related Art In a plating bath for continuously hot dip galvanizing a metal strip such as a steel strip, in a plating bath, iron eluted from rolls such as a sink roll arranged in the steel strip and the plating bath, and further plating Aluminum, etc., which is put into the plating bath for quality improvement, reacts with zinc to produce iron-zinc (FeZn 7 ), iron-aluminum (Fe
Dross containing an intermetallic compound such as 2 Al 5 ) as a main component is generated.

【0003】ドロスは、溶融亜鉛よりも比重が大きく、
めっき槽の底部に沈降して堆積するボトムドロスと、比
重が小さくめっき浴面上に浮遊するトップドロスとに大
別される。ドロスはめっき処理量にほぼ比例して生成さ
れ、以下のような問題点を生じている。 1)めっき浴中のドロスが鋼帯の走行に伴って引き上げ
られ、鋼帯表面に付着して品質を低下させる。 2)浴中ロールの表面にドロスが付着することにより、
鋼帯に押し疵が発生して品質を低下させる。 3)浴中ロールは非駆動ロールであるため、その回転部
にドロスが付着することにより回転不良を引き起こし、
鋼帯にすり疵が発生して品質を低下させる。 4)ドロスに起因するめっき設備の短命化と、これによ
る装置の手入れ、部品交換等のメンテナンス作業が増加
し、生産性も低下する。
Dross has a larger specific gravity than molten zinc,
It is roughly divided into bottom dross that settles and accumulates at the bottom of the plating tank and top dross that has a small specific gravity and floats on the plating bath surface. Dross is generated almost in proportion to the plating processing amount, and causes the following problems. 1) The dross in the plating bath is pulled up as the steel strip runs, and adheres to the surface of the steel strip to deteriorate the quality. 2) Due to the dross adhering to the surface of the roll in the bath,
The steel strips have flaws and deteriorate the quality. 3) Since the in-bath roll is a non-driving roll, dross adheres to its rotating part, causing rotation failure,
Scratches occur on the steel strip and deteriorate the quality. 4) Shortening the life of plating equipment due to dross, maintenance work such as maintenance of equipment and replacement of parts due to this increase, and productivity also decreases.

【0004】このうち特に3)に挙げた浴中ロールの回
転不良が発生すると、めっき作業を中止してロールを引
き上げ、交換しなければならず、大きな問題となる。こ
うした事態を回避するため、ボトムドロスは一定時間の
操業ごとに汲み上げ、排出し、トップドロスは操業中随
時かき寄せて除去、排出する必要があるが、これらの作
業はいずれも溶融亜鉛直近の高熱、重筋作業であり、き
わめて危険性が高い。
Particularly, when the in-bath roll rotation failure described in 3) occurs, it is necessary to stop the plating operation, pull up the roll and replace it, which is a serious problem. In order to avoid such a situation, bottom dross must be pumped up and discharged after every certain period of operation, and top dross must be scraped off and removed at any time during operation. It is a muscle work and is extremely dangerous.

【0005】そこで、人力によるドロス除去作業を軽減
するものとして、さまざまな溶融亜鉛めっき浴中のドロ
ス分離方法あるいはその装置が提案されている。特開昭
62−185863号公報には、めっき浴内に窒素等の不活性ガ
スを吹き込み、浴中に浮遊するドロスを除去しようとす
ることが記載されている。しかし、この方法によると、
めっき浴内を過剰に攪拌し、堆積しているボトムドロス
を巻き上げる結果、めっき浴の流動が激しくなってめっ
き浴表面における亜鉛の酸化が促進されてしまうという
問題点がある。
Therefore, various dross separation methods in hot-dip galvanizing baths or their devices have been proposed to reduce the work of removing dross manually. JPA
JP-A No. 62-185863 describes that an inert gas such as nitrogen is blown into the plating bath to remove dross floating in the bath. But according to this method,
As a result of excessively stirring the inside of the plating bath to wind up the accumulated bottom dross, the flow of the plating bath becomes violent and the oxidation of zinc on the surface of the plating bath is promoted.

【0006】実開平2-99958号公報には、めっき槽底部
に耐熱性のシート材を敷設し、このシート材を引き上げ
ることによりシート上に堆積したドロスを回収、除去す
ることが記載されている。しかし、この装置では、めっ
き浴中に浮遊してているドロスを除去することができな
いばかりでなく、シートの引き上げの際めっき浴を攪拌
してしまうのでボトムドロスも完全には回収できない。
Japanese Utility Model Laid-Open No. 2-99958 discloses that a heat-resistant sheet material is laid at the bottom of the plating tank, and the dross deposited on the sheet is collected and removed by pulling up the sheet material. . However, with this device, not only cannot the dross floating in the plating bath be removed, but also the bottom dross cannot be completely recovered because the plating bath is agitated when the sheet is pulled up.

【0007】特開平4-99258号公報には、めっき槽内の
めっき浴を汲みだしてサブポットに移送し、サブポット
内のめっき浴を高温に保持するとともにアルミニウム濃
度を高め、トップドロスとして浮上させて除去すること
が記載されている。この公報記載のめっき設備の一例を
図3により説明する。図3はめっき設備の概略断面図
で、91はめっき槽、92はシンクロール、93はサブポッ
ト、94は汲みだし管、95は汲みだしポンプ、96は戻し
管、97は戻しポンプ、Sは鋼帯、Zはめっき浴、D1はボ
トムドロス、D2はトップドロスである。右上方向からめ
っき浴Z中に引き入れられた鋼帯Sは、シンクロール92
に巻きついて方向を転換され、矢印のように垂直上方へ
引き上げられる。一方、ボトムドロスD1を含むめっき浴
Zの一部は、汲みだしポンプ95により汲みだし管94を経
てサブポット93に移送され、サブポット93内で保温、濃
縮されてトップドロスD2を浮上させ、ドロスを分離した
清浄なめっき浴は戻しポンプ97により戻し管96を経てめ
っき槽91に回収される。
In Japanese Patent Laid-Open No. 4-99258, a plating bath in a plating tank is pumped out and transferred to a sub-pot, the plating bath in the sub-pot is kept at a high temperature, the aluminum concentration is increased, and it is floated as a top dross. It is described to be removed. An example of the plating equipment described in this publication will be described with reference to FIG. Fig. 3 is a schematic sectional view of the plating equipment. 91 is a plating tank, 92 is a sink roll, 93 is a sub-pot, 94 is a pumping pipe, 95 is a pumping pump, 96 is a returning pipe, 97 is a returning pump, S is steel. Band, Z is plating bath, D 1 is bottom dross, and D 2 is top dross. The steel strip S drawn into the plating bath Z from the upper right direction is a sink roll 92.
It is wound around and the direction is changed, and it is pulled up vertically as shown by the arrow. On the other hand, a part of the plating bath Z containing the bottom dross D 1 is transferred by the pumping pump 95 to the sub-pot 93 through the pumping pipe 94, where it is kept warm and concentrated in the sub-pot 93 to float the top dross D 2 and the dross D 2 floats. The clean plating bath separated from is recovered by the return pump 97 into the plating tank 91 through the return pipe 96.

【0008】この方法においては、サブポット内のめっ
き浴は高アルミニウム濃度としているため、めっき槽内
のめっき浴とは成分が変化しており、多量の亜鉛を加え
て濃度調整した後でないとめっき槽に戻すことができ
ず、連続的な処理でドロスの除去ができない。また、特
開平4-160141号公報には、めっき浴を汲み上げ、セラミ
ックフィルタによりドロス分を分離して除去することが
記載されている。しかし、この装置によると、セラミッ
クフィルタが短時間で目詰まりするために、頻繁に交換
しなければならず、しかもセラミックフィルタは再使用
できないので膨大なコストを要し、実用性に大きな問題
がある。
In this method, since the plating bath in the sub-pot has a high aluminum concentration, the components are different from those in the plating bath in the plating bath, and the concentration must be adjusted by adding a large amount of zinc to the plating bath. However, the dross cannot be removed by continuous processing. Further, JP-A-4-160141 describes that the plating bath is pumped up and a dross component is separated and removed by a ceramic filter. However, according to this device, since the ceramic filter is clogged in a short time, it must be replaced frequently, and since the ceramic filter cannot be reused, enormous cost is required and there is a big problem in practicality. .

【0009】さらに特開平5-17859号公報には、めっき
浴をサブポットに汲みだし、この中に鉄−アルミニウム
の金属間化合物を添加してドロスを沈降させることが記
載されているが、前記特開平4-99258号公報記載のもの
と同様の問題点があり、また沈降させたドロスはいずれ
まとめて排出しなければならない。
Further, Japanese Patent Application Laid-Open No. 5-17859 describes that a plating bath is pumped to a sub-pot and an iron-aluminum intermetallic compound is added to the sub-pot to precipitate dross. There are the same problems as those described in Kaihei 4-99258, and the dross that have settled must be discharged together.

【0010】[0010]

【発明が解決しようとする課題】本発明は、従来の技術
における上記の諸問題点を解消し、連続的に効率よくド
ロスを排出する方法および装置を実現することを目的と
する。
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems in the prior art and to realize a method and apparatus for continuously and efficiently discharging dross.

【0011】[0011]

【課題を解決するための手段】本発明の溶融亜鉛めっき
浴中のドロス排出方法は、めっき槽に近接してサブポッ
トを設置し、めっき浴の一部をこのサブポット内に導
き、磁石を内蔵した円筒状のドラムの回転軸を水平方向
としてその下側の大半部分をサブポット内のめっき浴に
浸漬させ、ドロスをドラム表面に吸着させるとともにこ
のドラムを回転させ、ドラム表面に直線状のスクレーパ
を押し当てることによりドラム表面に吸着されたドロス
をかき落として除去することを特徴とする。
According to the method for discharging dross in a hot dip galvanizing bath of the present invention, a sub-pot is installed in the vicinity of the plating bath, a part of the plating bath is introduced into the sub-pot, and a magnet is incorporated. The rotation axis of the cylindrical drum is horizontal, and most of the lower part is immersed in the plating bath in the subpot to adsorb dross on the drum surface and rotate this drum, pressing a linear scraper on the drum surface. It is characterized in that the dross adsorbed on the drum surface is scraped off and removed by hitting.

【0012】また、本発明の溶融亜鉛めっき浴中のドロ
ス排出装置は、めっき槽に近接して設置したサブポット
と、めっき浴の一部をこのサブポット内に導く汲みだし
管と、表面内側に磁石を内蔵した円筒状のドラムと、こ
のドラムを回転自在に、かつこのドラムの下側の大半部
分がサブポット内のめっき浴に浸漬するように保持する
回転保持手段と、このドラムを回転させる回転駆動手段
と、ドラム表面に押し当てられる直線状のスクレーパと
から構成される。
Further, the dross discharging device in the hot dip galvanizing bath of the present invention comprises a sub-pot installed in the vicinity of the plating tank, a pumping pipe for guiding a part of the plating bath into the sub-pot, and a magnet on the inner surface. Cylindrical drum with built-in drum, rotation holding means that holds this drum rotatably and so that most of the lower side of this drum is immersed in the plating bath in the sub-pot, and rotation drive that rotates this drum And a linear scraper pressed against the drum surface.

【0013】[0013]

【作 用】本発明は、ドロスの主成分が鉄−亜鉛、鉄−
アルミニウムの金属間化合物であり、さらに、めっき浴
の温度が 460〜480 ℃程度であって鉄が磁石に吸着され
るキュリー点(キュリー温度)以下であることに着目し
て、磁石を内蔵したドラムをサブポットのめっき浴面付
近でゆっくり回転させることにより、めっき浴中のドロ
スをドラム表面に吸着し、これをスクレーパでかき落と
すことで連続的にドロスを排出するようにしたものであ
る。
[Operation] In the present invention, the main component of dross is iron-zinc, iron-
A drum with a built-in magnet, focusing on the fact that it is an intermetallic compound of aluminum and the temperature of the plating bath is about 460 to 480 ° C and is below the Curie point (Curie temperature) at which iron is adsorbed by the magnet. The dross in the plating bath is adsorbed to the surface of the drum by slowly rotating it in the vicinity of the plating bath surface of the sub-pot, and the dross is continuously discharged by scraping it off with a scraper.

【0014】[0014]

【実施例】本発明の一実施例を、図面により詳細に説明
する。図1は本発明のめっき浴中のドロス分離装置を示
す断面図で、1はドラム、2はスクレーパ、3はサブポ
ット、4は汲みだし管、6は戻し管である。図示しない
めっき槽から汲みだしためっき浴Zを、汲みだし管4を
経て、めっき槽に近接して設置したサブポット3内に導
くとともに、回転軸を水平方向とした円筒状のドラム1
を、その下側の大半部分がめっき浴Zに浸漬されるよう
に設置してある。ドラム1の胴部11内側には磁石12が内
蔵されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a dross separation device in a plating bath of the present invention, 1 is a drum, 2 is a scraper, 3 is a subpot, 4 is a pumping pipe, and 6 is a return pipe. A plating bath Z drawn from a plating tank (not shown) is introduced through a drawing pipe 4 into a sub-pot 3 installed in the vicinity of the plating tank, and a cylindrical drum 1 whose rotation axis is horizontal.
Is installed so that most of the lower side thereof is immersed in the plating bath Z. A magnet 12 is built inside the body 11 of the drum 1.

【0015】めっき浴Zとの接触によりドロスがドラム
1の表面に吸着され、矢印Bの方向にゆっくり回転する
と、ドラム1の頂部を通過した反対側にスクレーパ2が
ドラム1の表面にほぼ接触するように取り付けられてお
り、ドラム1の回転力により表面に吸着されてめっき浴
外に排出されたドロスがスクレーパ2にかき落とされ、
ドロス受け21に集積され、適宜取り出される。
When the dross is adsorbed on the surface of the drum 1 by contact with the plating bath Z and slowly rotated in the direction of the arrow B, the scraper 2 is almost in contact with the surface of the drum 1 on the opposite side from the top of the drum 1. The dross adsorbed on the surface by the rotational force of the drum 1 and discharged to the outside of the plating bath is scraped off by the scraper 2,
It is collected in the dross receiver 21 and taken out as appropriate.

【0016】スクレーパ2は直線のナイフ状であり、ド
ラム1の表面の接線方向あるいはそれよりやや起き上が
った角度で取り付けられる。サブポット3内の、ドラム
1に対して汲みだし管4の反対側には、底部は開口し浴
面をせき止める仕切り堰31と、浴面下に沈み底部を仕切
る仕切り堰32が設けられており、めっき浴Z内に浮遊し
ている鉄分を含まない酸化亜鉛等のトップドロスD2は仕
切り堰31にせき止められ、底部に堆積しているボトムド
ロスD1は仕切り堰32にせき止められ、ドロスを含まない
清浄なめっき浴のみが矢印Cのように仕切り堰31、32を
くぐりぬけ、戻し管6からめっき槽へ戻される。
The scraper 2 has a straight knife shape and is attached in a tangential direction of the surface of the drum 1 or at a slightly raised angle. In the sub pot 3, on the side opposite to the pumping pipe 4 with respect to the drum 1, there are provided a partition weir 31 that opens at the bottom and stops the bath surface, and a partition weir 32 that sinks below the bath surface and partitions the bottom. Top dross D 2 such as zinc oxide containing no iron floating in the plating bath Z is dammed by the partition weir 31, and bottom dross D 1 accumulated at the bottom is dammed by the partition weir 32 and does not contain dross. Only the clean plating bath passes through the partition weirs 31, 32 as shown by arrow C, and is returned from the return pipe 6 to the plating tank.

【0017】図2は図1のAA矢視による断面図であ
る。ドラム1の最下端部は、サブポット3の底部33に堆
積するドロスを吸着できる程度に、なるべく深く浸漬し
ていることが望ましく、またドラム1とサブポット3の
側壁34との隙間も少ない方がドロスの捕捉率が高まるの
で好ましい。ただし、浴中のドロスがドラム1に吸着し
やすいように、サブポット3内のめっき浴Zの流れはで
きるだけ遅くすることが望ましい。
FIG. 2 is a sectional view taken along the line AA of FIG. It is desirable that the lowermost end of the drum 1 be immersed as deeply as possible so that the dross accumulated on the bottom 33 of the sub pot 3 can be adsorbed, and the smaller the gap between the drum 1 and the side wall 34 of the sub pot 3, the dross. Is preferable because the capture rate of However, it is desirable to make the flow of the plating bath Z in the subpot 3 as slow as possible so that the dross in the bath is easily adsorbed to the drum 1.

【0018】なお、ドラム1に吸着された浴中のドロス
が凝固して、スクレーパでのはぎとりが困難にならない
よう、ドラム1の周囲を覆い保温することが望ましい。
一方、図2に示すように、ドラム1の回転保持手段であ
る回転軸13や軸受14等はめっき浴面より上にある方が構
造が簡単である。したがって、ドラム1の下側の大半部
分、すなわち、図1に示したように、円周の40%程度が
めっき浴Zに浸漬するように設計するのが現実的であ
る。
In order to prevent the dross in the bath adsorbed on the drum 1 from solidifying and making it difficult to scrape off with a scraper, it is desirable to cover the drum 1 and keep it warm.
On the other hand, as shown in FIG. 2, the rotating shaft 13, which is the rotation holding means of the drum 1, the bearing 14, and the like are simpler in structure when they are above the plating bath surface. Therefore, it is realistic to design so that most of the lower side of the drum 1, that is, about 40% of the circumference is immersed in the plating bath Z as shown in FIG.

【0019】ドラムは回転駆動手段である軸継手15、減
速機16、モータ17によりゆっくりと回転させる。なお、
前記したようにドラム1は、胴部11の内側に磁石12が組
み込んである。胴部11は、磁石12が直接めっき浴Zに接
触して浸食されないように保護するシェルであり、耐食
性、耐熱性があって亜鉛が付着しにくく、かつ磁力線を
透過できるもの、たとえばセラミックやステンレス鋼板
等がよい。
The drum is slowly rotated by a shaft coupling 15, a speed reducer 16, and a motor 17, which are rotation driving means. In addition,
As described above, the drum 1 has the magnet 12 incorporated inside the body 11. The body portion 11 is a shell that protects the magnet 12 from being directly contacted with the plating bath Z and eroded, and has corrosion resistance and heat resistance, prevents zinc from adhering, and allows magnetic field lines to pass therethrough, such as ceramic or stainless steel. Steel plate is good.

【0020】磁石12は、永久磁石が簡易であるが、十分
な水冷等を施すことができれば、電磁石を使用すること
もできる。
The magnet 12 is a simple permanent magnet, but an electromagnet may be used if it can be sufficiently cooled with water.

【0021】[0021]

【発明の効果】本発明によれば、めっき浴中のドロスを
連続的、効率的に排出できるから、めっき浴をドロスの
ない清浄な状態に保持することができ、鋼帯表面や浴中
ロール軸受部へのドロスの付着による鋼帯のすり疵、押
し疵の発生がなく、めっき製品の品質が向上する。
According to the present invention, since the dross in the plating bath can be discharged continuously and efficiently, the plating bath can be kept in a clean state without dross, and the surface of the steel strip or the bath roll can be maintained. The quality of plated products is improved without the occurrence of scratches or push marks on the steel strip due to the adhesion of dross to the bearing.

【0022】また、めっき浴をドロスのない清浄な状態
に保持することによりめっき設備の手入れや交換等の周
期が大幅に延長され、保全費用の低減ならびに生産コス
トの低減をはかることができるなどの、すぐれた効果を
奏する。
Further, by maintaining the plating bath in a clean state without dross, the cycle of maintenance, replacement, etc. of the plating equipment can be greatly extended, and maintenance costs and production costs can be reduced. , Produces excellent effects.

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

【図1】本発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.

【図2】図1のAA矢視による断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.

【図3】従来の技術を示す概略断面図である。FIG. 3 is a schematic cross-sectional view showing a conventional technique.

【符号の説明】 1 ドラム 2 スクレーパ 3 サブポット 4 汲みだし管 6 戻し管 11 胴部 12 磁石 13 回転軸 14 軸受 15 軸継手 16 減速機 17 モータ 21 ドロス受け 31、32 仕切り堰 33 底部 34 側壁 91 めっき槽 92 シンクロール 93 サブポット 94 汲みだし管 95 汲みだしポンプ 96 戻し管 97 戻しポンプ S 鋼帯 Z めっき浴 D1 ボトムドロス D2 トップドロス[Explanation of symbols] 1 drum 2 scraper 3 subpot 4 pumping pipe 6 return pipe 11 body 12 magnet 13 rotating shaft 14 bearing 15 shaft joint 16 reducer 17 motor 21 dross receiver 31, 32 partition weir 33 bottom 34 sidewall 91 plating Tank 92 Synchro roll 93 Sub-pot 94 Pumping pipe 95 Pumping pump 96 Return pipe 97 Return pump S Steel strip Z Plating bath D 1 Bottom dross D 2 Top dross

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 めっき槽に近接してサブポットを設置
し、めっき浴の一部をこのサブポット内に導き、磁石を
内蔵した円筒状のドラムの回転軸を水平方向としてその
下側の大半部分をサブポット内のめっき浴に浸漬させ、
ドロスをドラム表面に吸着させるとともにこのドラムを
回転させ、ドラム表面に直線状のスクレーパを押し当て
ることによりドラム表面に吸着されたドロスをかき落と
して除去することを特徴とする溶融亜鉛めっき浴中のド
ロス排出方法。
1. A sub-pot is installed in the vicinity of a plating bath, a part of the plating bath is guided into this sub-pot, and a rotary shaft of a cylindrical drum containing a magnet is set in the horizontal direction, and most of the lower part thereof is Immerse in the plating bath in the sub pot,
The dross in the hot dip galvanizing bath is characterized in that the dross is adsorbed on the drum surface, the drum is rotated, and a linear scraper is pressed against the drum surface to scrape off and remove the dross adsorbed on the drum surface. Ejection method.
【請求項2】 ドロスを分離したサブポット内のめっき
浴をめっき槽に戻すことを特徴とする請求項1に記載の
溶融亜鉛めっき浴中のドロス排出方法。
2. The method for discharging dross in a hot dip galvanizing bath according to claim 1, wherein the plating bath in the subpot from which the dross is separated is returned to the plating bath.
【請求項3】 めっき槽に近接して設置したサブポット
(3)と、めっき浴(Z)の一部をこのサブポット
(3)内に導く汲みだし管(4)と、表面内側に磁石
(12)を内蔵した円筒状のドラム(1)と、このドラム
(1)を回転自在に、かつこのドラムの下側の大半部分
がサブポット(3)内のめっき浴(Z)に浸漬するよう
に保持する回転保持手段(13、14)と、このドラムを回
転させる回転駆動手段(15、16、17)と、ドラム表面に
押し当てられる直線状のスクレーパ(2)とから構成さ
れる溶融亜鉛めっき浴中のドロス排出装置。
3. A sub-pot (3) installed close to the plating tank, a pumping pipe (4) for guiding a part of the plating bath (Z) into the sub-pot (3), and a magnet (12) inside the surface. ) Built-in cylindrical drum (1) and the drum (1) are rotatably held and most of the lower side of the drum is immersed in the plating bath (Z) in the sub-pot (3) Hot-dip galvanizing bath composed of rotation holding means (13, 14) for rotating, rotation driving means (15, 16, 17) for rotating the drum, and a linear scraper (2) pressed against the drum surface. Inside dross discharge device.
【請求項4】 ドラムの表面内側に内蔵される磁石(1
2)が永久磁石である請求項3に記載の溶融亜鉛めっき
浴中のドロス排出装置。
4. A magnet (1 incorporated inside a surface of a drum)
The dross discharging device in the hot dip galvanizing bath according to claim 3, wherein 2) is a permanent magnet.
【請求項5】 ドラムの表面内側に内蔵される磁石(1
2)が電磁石である請求項3に記載の溶融亜鉛めっき浴
中のドロス排出装置。
5. A magnet (1 incorporated inside a surface of a drum)
The device for discharging dross in a hot dip galvanizing bath according to claim 3, wherein 2) is an electromagnet.
JP23147394A 1994-09-27 1994-09-27 Discharge of dross in galvanizing bath and device therefor Pending JPH0892710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23147394A JPH0892710A (en) 1994-09-27 1994-09-27 Discharge of dross in galvanizing bath and device therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23147394A JPH0892710A (en) 1994-09-27 1994-09-27 Discharge of dross in galvanizing bath and device therefor

Publications (1)

Publication Number Publication Date
JPH0892710A true JPH0892710A (en) 1996-04-09

Family

ID=16924052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23147394A Pending JPH0892710A (en) 1994-09-27 1994-09-27 Discharge of dross in galvanizing bath and device therefor

Country Status (1)

Country Link
JP (1) JPH0892710A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002220649A (en) * 2001-01-29 2002-08-09 Kawasaki Steel Corp Device and method for removing adhered substance on surface of roll in molten metal plating bath
WO2003061893A1 (en) * 2002-01-18 2003-07-31 Speedline Technologies, Inc. Solder-dross mixture separation method and apparatus
US6948650B2 (en) 2001-01-12 2005-09-27 Speedline Technologies, Inc. Dross removal and solder reclamation improvements
JP2008121065A (en) * 2006-11-13 2008-05-29 Jfe Steel Kk Hot-dip metal-plating apparatus
JP2008231526A (en) * 2007-03-22 2008-10-02 Jfe Steel Kk Molten metal plating method, and device therefor
KR101312518B1 (en) * 2011-07-29 2013-10-01 주식회사 포스코 Apparatus for eliminating dross of galvanizing bath
JP2014501336A (en) * 2010-12-27 2014-01-20 ポスコ Source removal device in the snout
WO2018117755A1 (en) * 2016-12-23 2018-06-28 주식회사 포스코 Plating apparatus and plating method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6948650B2 (en) 2001-01-12 2005-09-27 Speedline Technologies, Inc. Dross removal and solder reclamation improvements
JP2002220649A (en) * 2001-01-29 2002-08-09 Kawasaki Steel Corp Device and method for removing adhered substance on surface of roll in molten metal plating bath
WO2003061893A1 (en) * 2002-01-18 2003-07-31 Speedline Technologies, Inc. Solder-dross mixture separation method and apparatus
US6666370B2 (en) 2002-01-18 2003-12-23 Speedline Technologies, Inc. Solder-dross mixture separation method and apparatus
JP2005515079A (en) * 2002-01-18 2005-05-26 スピードライン・テクノロジーズ・インコーポレイテッド Method and apparatus for separating solder dross mixture
JP2008121065A (en) * 2006-11-13 2008-05-29 Jfe Steel Kk Hot-dip metal-plating apparatus
JP2008231526A (en) * 2007-03-22 2008-10-02 Jfe Steel Kk Molten metal plating method, and device therefor
JP2014501336A (en) * 2010-12-27 2014-01-20 ポスコ Source removal device in the snout
KR101312518B1 (en) * 2011-07-29 2013-10-01 주식회사 포스코 Apparatus for eliminating dross of galvanizing bath
WO2018117755A1 (en) * 2016-12-23 2018-06-28 주식회사 포스코 Plating apparatus and plating method

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