JP5470907B2 - Plating powder dust collector for hot dipping - Google Patents

Plating powder dust collector for hot dipping Download PDF

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JP5470907B2
JP5470907B2 JP2009044433A JP2009044433A JP5470907B2 JP 5470907 B2 JP5470907 B2 JP 5470907B2 JP 2009044433 A JP2009044433 A JP 2009044433A JP 2009044433 A JP2009044433 A JP 2009044433A JP 5470907 B2 JP5470907 B2 JP 5470907B2
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plating powder
suction port
support roll
plating
dust collection
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JP2010196135A (en
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実 窪津
宰 西巻
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JFE Steel Corp
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JFE Steel Corp
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Description

本発明は、連続溶融めっきラインにおいて、めっき浴上のサポートロールを通過時に飛散するめっき粉末を回収する溶融めっきのめっき粉末集塵装置に関するものである。   The present invention relates to a plating powder dust collector for hot dipping that collects a plating powder that scatters when passing through a support roll on a plating bath in a continuous hot dipping line.

溶融Znめっき鋼板、溶融Al−Znめっき鋼板等は、その高い防錆性によって、主に建材、自動車、家電、電子機器等の分野に広く用いられている。   Hot-dip Zn-plated steel sheets, hot-dip Al—Zn-plated steel sheets and the like are widely used mainly in the fields of building materials, automobiles, home appliances, electronic devices and the like due to their high rust prevention properties.

かかる溶融めっき鋼板の製造に際しては、まず、冷延板等の鋼板を、スナウト、Zn等のめっき浴シンクロール、浴中サポートロールに通過させることにより、鋼板表面に溶融めっきを施す。ついで、めっき浴外に導き、ガスワイピングノズルにより、鋼板に付着している過剰の溶融めっきを取り除く。その後、浴上のサポートロールを通過させ、コイルに巻き取って製品となる。
上記のサポートロールは、後続工程のパスラインの保持および搬送中の鋼板の振動防止対策として配置されている。
In the production of such a hot dipped steel sheet, first, the steel sheet surface is subjected to hot dipping by passing a steel sheet such as a cold-rolled sheet through a plating bath sink roll such as snout or Zn and a support roll in the bath. Then, the molten metal is led out of the plating bath, and excess hot dip plating adhering to the steel sheet is removed by a gas wiping nozzle. Thereafter, the product is passed through a support roll on the bath and wound around a coil to obtain a product.
Said support roll is arrange | positioned as a countermeasure of holding | maintaining the pass line of a subsequent process, and the vibration prevention of the steel plate in conveyance.

サポートロールを通過する際、ガスワイピングノズルにより、所定の目付け量に調整されたとはいえ、このめっきは未だ完全に固化していないため、このサポートロールとめっき鋼板との接触によりZn、Al等のめっき粉末が飛散する。そこで、特許文献1には、図1に示すような、サポートロール上に飛散防止としてのめっき粉末集塵フードが記載されている。なお、図中、1はサポートロール、2は集塵フード、3はめっき鋼板である。   When passing through the support roll, although it was adjusted to a predetermined basis weight by the gas wiping nozzle, since this plating has not yet completely solidified, contact between this support roll and the plated steel sheet causes Zn, Al, etc. The plating powder is scattered. Therefore, Patent Document 1 describes a plating powder dust collection hood as shown in FIG. 1 for preventing scattering on a support roll. In the figure, 1 is a support roll, 2 is a dust collecting hood, and 3 is a plated steel plate.

特開2000−328213号公報JP 2000-328213 A

しかしながら、前記した集塵フードは、サポートロールと独立して設置されているので、例えば、コイル繋ぎ点の幅上がり部の通過などによって、鋼板の厚みが変動した場合、それによってサポートロールの間隔が変動するため、これを考慮して近接して設置することができなかった。そのため、サポートロールによって剥離されためっき粉末の吸引率は、必ずしも良好とは言えなかった。また、前記した集塵フードで吸いきれなかっためっき粉末は、周囲に飛散し、鋼板近傍に落下した場合には、鋼板を傷つけ、歩留りの低下を招くという問題があった。   However, since the dust collection hood described above is installed independently of the support rolls, for example, when the thickness of the steel sheet fluctuates due to passage of the widened portion of the coil connection point, the spacing between the support rolls is thereby increased. Because it fluctuates, it was not possible to install them in close proximity in consideration of this. For this reason, the suction rate of the plating powder peeled off by the support roll is not necessarily good. In addition, the plating powder that could not be absorbed by the dust collection hood scatters to the surroundings, and when it falls to the vicinity of the steel plate, there is a problem that the steel plate is damaged and the yield is reduced.

本発明は、これらの問題を有利に解決するもので、サポートロールによって剥離等されためっき粉末の吸引率を向上させ、かつ飛散しためっき粉末をも効果的に吸引して、溶融めっき鋼板の歩留りを向上させることができるめっき粉末集塵装置を提供することを目的とする。   The present invention advantageously solves these problems, improves the suction rate of the plating powder peeled off by the support roll, and effectively sucks the scattered plating powder, thereby improving the yield of the hot-dip plated steel sheet. An object of the present invention is to provide a dust collector for plating powder capable of improving the resistance.

すなわち、本発明の要旨構成は次のとおりである。
(1)連続溶融めっきラインのめっき浴槽の上方に設置されたサポートロールから飛散するめっき粉末を捕集する集塵装置であって、該装置は、めっき粉末捕集用の集塵フードと、該サポートロールの開閉移動に伴い該集塵フードを同期移動させる連結アームとを供え、該集塵フードの先端部は、めっき鋼板に対し、外側に傾斜しており、また、該集塵フードの先端部は、該サポートロール外周を覆って該サポートロールから剥がれためっき粉末を吸引する第1の吸引口を有し、かつ該第1の吸引口で捕集しきれない飛散しためっき粉末を捕集する第2の吸引口を、該集塵フード上面の先端部にそなえ、さらに、該第1の吸引口と該第2の吸引口との間に仕切り板を設けたことを特徴とするめっき粉末集塵装置。
That is, the gist configuration of the present invention is as follows.
(1) A dust collector that collects plating powder scattered from a support roll installed above a plating bath of a continuous hot dipping line, the device including a dust collection hood for collecting plating powder, with the opening and closing movement of the support roll equipped with a connecting arm for synchronously moving the dust collection hood, the distal end portion of the dust collecting hood, to plated steel sheets are inclined outwardly, also, the tip of the dust collecting hood The part has a first suction port that covers the outer periphery of the support roll and sucks the plating powder peeled off from the support roll, and collects the scattered plating powder that cannot be collected by the first suction port. A plating powder comprising a second suction port that is provided at the tip of the upper surface of the dust collection hood, and a partition plate provided between the first suction port and the second suction port Dust collector.

(2)前記集塵フードは、前記サポートロールから剥がれためっき粉末を吸引する第1の吸引口と飛散しためっき粉末を吸引する第2の吸引口に対し、それぞれ独立した2つの吸引系統を有していることを特徴とする前記(1)に記載のめっき粉末集塵設備。   (2) The dust collection hood has two independent suction systems for the first suction port for sucking the plating powder peeled from the support roll and the second suction port for sucking the scattered plating powder. The plating powder dust collecting equipment according to (1) above, wherein

本発明によれば、サポートロールとめっき粉末集塵フードを同時に開閉するため、鋼板の厚みの変動に柔軟に対応することができる。また、サポートロールに対して吸引口を近接配置できるので、めっき粉末の吸引率が格段に向上する。さらに、上記の吸引口で吸引しきれなかっためっき粉末をも吸引することができる。そのため、歩留りの向上、安定した品質の鋼板が製造できるとともに、工程内環境も格段に向上することができる。   According to the present invention, since the support roll and the plating powder dust collection hood are opened and closed simultaneously, it is possible to flexibly cope with fluctuations in the thickness of the steel sheet. Further, since the suction port can be disposed close to the support roll, the suction rate of the plating powder is remarkably improved. Furthermore, the plating powder that could not be sucked by the suction port can be sucked. Therefore, it is possible to improve the yield, manufacture a steel plate with stable quality, and improve the in-process environment markedly.

従来のサポートロールおよびめっき粉末集塵フードの側断面図である。It is a sectional side view of the conventional support roll and plating powder dust collection hood. 本発明に従うサポートロールおよびめっき粉末集塵フードの側断面図である。It is side sectional drawing of the support roll and plating powder dust collection hood according to this invention. 本発明に従うめっき粉末集塵フードの正面図である。It is a front view of the plating powder dust collection hood according to the present invention. 鋼板の不良率を発明例と従来例とで示した図である。It is the figure which showed the defect rate of the steel plate with the invention example and the prior art example.

以下、本発明の解明経緯について説明する。
発明者らは、まず、集塵フードをサポートロールに近接する方法について検討した。この時、ただ近接しただけでは、鋼板の厚みが変わったときなどに、集塵フードとサポートロールとが接触し、サポートロールに傷が付いて、この傷が鋼板も傷つけるといった弊害が生じることが判明した。また、シーケンスによる同時駆動制御も機構が煩雑になり、設備の大きさ等からも、同期を取ることが困難であることが分かった。
The elucidation process of the present invention will be described below.
The inventors first studied a method of bringing the dust collection hood close to the support roll. At this time, if the thickness of the steel plate changes, the dust collection hood and the support roll may come into contact with each other, and the support roll may be damaged, and this scratch may damage the steel plate. found. In addition, it was found that the simultaneous drive control by the sequence also has a complicated mechanism, and it is difficult to synchronize from the size of the equipment.

そこで、集塵フードとサポートロールとを連結することに想い到った。
図2、3に、本発明に従う溶融めっきのめっき粉末集塵装置の好適例を示す。図中、11はサポートロール、12は連結アーム、13は集塵フード、13aは第1の吸引口、13bは第2の吸引口、14は傾斜面、15はめっき後の鋼板、16、17は集塵口、18、19は集塵ホースである。同図に示すようにサポートロール11の軸に連結アーム12の一方を接続し、他方を集塵フード13に接続している。
Then, it came to the idea to connect a dust collection hood and a support roll.
2 and 3 show preferred examples of a plating powder dust collector for hot dipping in accordance with the present invention. In the figure, 11 is a support roll, 12 is a connecting arm, 13 is a dust collecting hood, 13a is a first suction port, 13b is a second suction port, 14 is an inclined surface, 15 is a steel plate after plating, 16, 17 Is a dust collecting port, 18 and 19 are dust collecting hoses. As shown in the figure, one end of the connecting arm 12 is connected to the shaft of the support roll 11 and the other end is connected to the dust collecting hood 13.

この連結によって、サポートロール11と集塵フード13とのギャップを大幅に縮めることが可能となり、第1の吸引口13aから吸引されるめっき粉末の量を格段に増加させることが可能となった。また、同時にコイル繋ぎ点の幅上がり時に発生するエッジ部とフード先端引掛けによる鋼板破断トラブルも解消した。   By this connection, the gap between the support roll 11 and the dust collection hood 13 can be greatly reduced, and the amount of plating powder sucked from the first suction port 13a can be remarkably increased. At the same time, the trouble of breaking the steel sheet due to the hooking at the edge and the edge of the hood, which occurs when the coil connection point increases, is also solved.

ついで、集塵フードの鋼板側の上面に、次第にめっき粉が堆積し、その後落下して鋼板表面を傷つける等の問題が生じていることも分かった。
そこで、集塵フード13に傾斜面14を設けると共に第2の吸引口13bを設けた。すると、第1の吸引口13aによって捕集しきれなかっためっき粉末も吸引できるようになった。
Then, it was also found that the plating powder gradually deposited on the upper surface of the dust collecting hood on the steel plate side and then dropped and damaged the steel plate surface.
Therefore, the dust collecting hood 13 is provided with the inclined surface 14 and the second suction port 13b. Then, the plating powder that could not be collected by the first suction port 13a can be sucked.

本発明において、サポートロール11は、従来公知のもので良いが、その軸部に連結アーム12を取り付ける。この連結アーム12は、サポートロール11と集塵フード13とを所望の距離の接続を維持し、サポートロール11と集塵フード13とが連動して動く動きを担保できるものであれば、形状材質等は特に制限はない。なお、サポートロール11と集塵フード13との距離についても、特に制限はないが、5mm程度とするのが望ましい。   In the present invention, the support roll 11 may be a conventionally known one, but the connecting arm 12 is attached to the shaft portion thereof. The connecting arm 12 can be made of any material that can maintain the connection of the support roll 11 and the dust collection hood 13 at a desired distance and can ensure movement of the support roll 11 and the dust collection hood 13 in conjunction with each other. Etc. are not particularly limited. The distance between the support roll 11 and the dust collecting hood 13 is not particularly limited, but is preferably about 5 mm.

集塵フード13は、その先端部をめっき鋼板に対し、外側に傾斜させ、上面に第2の吸引口13bを設け、サポートロール11から剥離しためっき粉末をこの第2の吸引口13bで吸引する。   The dust collection hood 13 has its tip end inclined to the outside with respect to the plated steel sheet, a second suction port 13b is provided on the upper surface, and the plating powder peeled off from the support roll 11 is sucked by the second suction port 13b. .

上記の第2の吸引口13bから捕集しためっき粉末が、集塵フード13のサポートロール11側口に回り込んで、サポートロール11を傷つけるおそれを防止するために、第2の吸引口13bの下に仕切り板を取り付けることが必要である。
また、めっき粉末の吸引に際しては、1つの吸引系統で吸引することもできるが、図2に示したように、各吸引口に対してそれぞれ独立した2系統の吸引機構(16,17,18,19)とすることもできる。
このような構造とすることにより、従来と同じ吸引力でも、めっき粉末の収集能力が格段に向上した。なお、吸引力は装置の大きさ等に従って適宜調整すればよい。
In order to prevent the plating powder collected from the second suction port 13b from entering the support roll 11 side port of the dust collection hood 13 and damaging the support roll 11, the second suction port 13b It is necessary to attach a partition plate underneath.
Further, when the plating powder is sucked, it can be sucked by one suction system, but as shown in FIG. 2, two independent suction mechanisms (16, 17, 18, 18, 19).
By adopting such a structure, the collecting ability of the plating powder was remarkably improved even with the same suction force as before. The suction force may be adjusted as appropriate according to the size of the apparatus.

連続焼鈍後の冷延鋼板を、460℃の溶融Znめっき浴に浸漬し、上方に引き上げる際、ガスワイピングにより、目付け量を50g/m2に調整した後、図1および図2に示したサポートロールを通過させ、その後巻き取って製品とした。
その時のめっき(Zn)粉末吸引量を測定した。その結果、従来の集塵フードは、0.25kg/hrであったのに対し、本発明では、0.46kg/hrであった。
なお、めっき粉末吸引量の測定方法は、次のとおりである。
めっき粉末集塵装置のめっき粉末回収バックに溜まっためっき粉末量を一定期間(4日間)収集し、1時間当たりの収集量(kg)に換算して比較した。
When the cold-rolled steel sheet after continuous annealing is immersed in a hot-dip Zn plating bath at 460 ° C and pulled upward, the basis weight is adjusted to 50 g / m 2 by gas wiping, and then the support shown in FIGS. 1 and 2 The roll was passed through and then wound up to obtain a product.
The plating (Zn) powder suction amount at that time was measured. As a result, the conventional dust collection hood was 0.25 kg / hr, whereas in the present invention, it was 0.46 kg / hr.
In addition, the measuring method of the plating powder suction amount is as follows.
The amount of plating powder accumulated in the plating powder collection bag of the plating powder dust collector was collected for a certain period (4 days) and converted to the amount collected (kg) per hour for comparison.

さらにその時の鋼板の不良率を、浴上サポートロールの場所で発生する不良に限って調査した。なお、不良率の測定方法は、次のとおりである。
一定期間の生産量に対するスプラッシュ欠陥による格落ち量の比率で不良率を調査した。その結果を図4に示す。
同図に示したように格段に、不良率が低下しているのが分かる。
なお、上述した実施例では、溶融Znめっき鋼板によるZn粉末集塵について記載したが、Zn粉末に限るものではなく、Al−Znめっき、Snめっき等各種金属または合金の溶融めっき時に発生するめっき粉末および溶融めっき後に発生する粉塵等、いずれも好適に集塵することができる。
Furthermore, the defect rate of the steel sheet at that time was investigated only for defects occurring at the place of the support roll on the bath. In addition, the measuring method of a defective rate is as follows.
The defect rate was investigated by the ratio of the number of failures due to splash defects to the production volume over a certain period. The result is shown in FIG.
As shown in the figure, it can be seen that the defect rate is remarkably reduced.
In the above-described embodiments, the Zn powder dust collection using the hot-dip Zn-plated steel sheet is described. However, the present invention is not limited to the Zn powder, and the plating powder generated during hot-dip plating of various metals or alloys such as Al-Zn plating and Sn plating. In addition, dust generated after hot dipping can be suitably collected.

本発明は、溶融めっき鋼板の歩留りを格段に向上することができるため、高品質低価格な溶融めっき鋼板を提供できる。   The present invention can significantly improve the yield of the hot-dip galvanized steel sheet, and therefore can provide a high-quality and low-cost hot-dip galvanized steel sheet.

1 サポートロール
2 集塵フード
3 めっき鋼板
11 サポートロール
12 連結アーム
13 集塵フード
13a 第1の吸引口
13b 第2の吸引口
14 傾斜面
15 めっき後の鋼板
16,17 集塵口
18,19 集塵ホース
1 Support roll 2 Dust collection hood 3 Plated steel sheet
11 Support roles
12 Connecting arm
13 Dust collection hood
13a First suction port
13b Second suction port
14 Inclined surface
15 Steel plate after plating
16,17 Dust collector
18,19 Dust collection hose

Claims (2)

連続溶融めっきラインのめっき浴槽の上方に設置されたサポートロールから飛散するめっき粉末を捕集する集塵装置であって、該装置は、めっき粉末捕集用の集塵フードと、該サポートロールの開閉移動に伴い該集塵フードを同期移動させる連結アームとを供え、該集塵フードの先端部は、めっき鋼板に対し、外側に傾斜しており、また、該集塵フードの先端部は、該サポートロール外周を覆って該サポートロールから剥がれためっき粉末を吸引する第1の吸引口を有し、かつ該第1の吸引口で捕集しきれない飛散しためっき粉末を捕集する第2の吸引口を、該集塵フード上面の先端部にそなえ、さらに、該第1の吸引口と該第2の吸引口との間に仕切り板を設けたことを特徴とするめっき粉末集塵装置。 A dust collector that collects plating powder scattered from a support roll installed above a plating bath of a continuous hot dipping line, the apparatus comprising: a dust collection hood for collecting plating powder; and with the opening and closing movement equipped and a connecting arm for synchronously moving the dust collection hood, the distal end portion of the dust collecting hood, to plated steel sheets are inclined outwardly, the tip portion of the dust collecting hood, A second suction port that covers the outer periphery of the support roll and has a first suction port for sucking the plating powder peeled off from the support roll, and that collects scattered plating powder that cannot be collected by the first suction port. The dust collector is characterized in that a suction plate is provided at the tip of the upper surface of the dust collection hood, and a partition plate is provided between the first suction port and the second suction port. . 前記集塵フードは、前記サポートロールから剥がれためっき粉末を吸引する第1の吸引口と飛散しためっき粉末を吸引する第2の吸引口に対し、それぞれ独立した2つの吸引系統を有していることを特徴とする請求項1に記載のめっき粉末集塵装置。   The dust collection hood has two independent suction systems for the first suction port that sucks the plating powder peeled off from the support roll and the second suction port that sucks the scattered plating powder. The plating powder dust collector of Claim 1 characterized by the above-mentioned.
JP2009044433A 2009-02-26 2009-02-26 Plating powder dust collector for hot dipping Expired - Fee Related JP5470907B2 (en)

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JP4359984B2 (en) * 1999-03-15 2009-11-11 Jfeスチール株式会社 Dust collection hood on hot dip galvanizing bath
JP2000297357A (en) * 1999-04-09 2000-10-24 Nippon Steel Corp Cooling apparatus in heat treatment furnace
JP2006274409A (en) * 2005-03-30 2006-10-12 Jfe Steel Kk Apparatus for manufacturing galvannealed steel sheet

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