JP2000328213A - Dust collection hood above hot dip galvanizing bath - Google Patents

Dust collection hood above hot dip galvanizing bath

Info

Publication number
JP2000328213A
JP2000328213A JP11368899A JP36889999A JP2000328213A JP 2000328213 A JP2000328213 A JP 2000328213A JP 11368899 A JP11368899 A JP 11368899A JP 36889999 A JP36889999 A JP 36889999A JP 2000328213 A JP2000328213 A JP 2000328213A
Authority
JP
Japan
Prior art keywords
dust collecting
collecting hood
steel strip
dip galvanizing
support roll
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.)
Granted
Application number
JP11368899A
Other languages
Japanese (ja)
Other versions
JP4359984B2 (en
JP2000328213A5 (en
Inventor
Kazuhiro Otsuka
和弘 大塚
Hideki Emoto
秀樹 江本
Shigeyuki Saito
滋之 斉藤
Hiroyuki Nakajima
宏幸 中島
Makoto Arai
信 新井
Shigeko Sujita
成子 筋田
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 JP36889999A priority Critical patent/JP4359984B2/en
Publication of JP2000328213A publication Critical patent/JP2000328213A/en
Publication of JP2000328213A5 publication Critical patent/JP2000328213A5/ja
Application granted granted Critical
Publication of JP4359984B2 publication Critical patent/JP4359984B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a dust collecting hood above a hot dip galvanizing bath capable of more efficiently absorbing zinc powder, etc., than heretofore. SOLUTION: The aperture 3 of the dust collecting hood 2 which covers above a pair of support rolls for supporting a steel strip by coming into contact with both surfaces of the steel strip pulled up from a hot dip galvanizing bath and has the aperture to suck the zinc powder and zinc fumes splashing near the support rolls satisfies the following conditions: 5 mm<=D<=40 mm, 0.5 mm<=L<=40 mm, further preferably 5<=D<=25 mm, 0.5 mm<=L<=10 mm. Where, D is a horizontal spacing between the steel strip side end E of the aperture and the front surface of the steel strip and L is the distance from E to the surface of the support roll of a straight line connecting the central axis C of the support roll and E.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、溶融亜鉛めっき浴
上の集塵フードに係わり、詳しくは、溶融亜鉛めっき浴
の上方で鉛直方向に走行するめっき済み鋼板の両面に接
触し、支持する一対のサポート・ロール近傍から、亜鉛
粉や亜鉛ヒュームが飛散するのを防止し、これらに起因
する鋼板表面の外観不良を防止する技術である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting hood on a hot-dip galvanizing bath, and more particularly, to a dust collecting hood that contacts and supports both sides of a plated steel sheet that runs vertically above a hot-dip galvanizing bath. This technology prevents zinc powder and zinc fume from scattering from the vicinity of the support roll, and prevents the appearance of the steel sheet from being poor due to these.

【0002】[0002]

【従来の技術】図2に示す鋼板の連続溶融亜鉛めっき装
置では、めっき浴4から引き上げられ、鉛直上方に高速
度で走行するめっき済み鋼帯7の振動を抑えるため、該
めっき浴4及びめっき付着量を調整するワイピング・ノ
ズル5の上方に、鋼帯7の両面に接触し、支持する一対
のサポート・ロール1が設けられている。そして、この
サポート・ロール1近傍の大気中には、該サポート・ロ
ール1、あるいはワイピング・ノズル5から吹き飛ばさ
れた亜鉛粉や亜鉛ヒューム(以下、まとめて亜鉛粉等と
いう)が飛散する。これらの亜鉛粉等の飛散を防止する
ため、以前は、サポート・ロール1の表面温度や、接触
する鋼帯7の表面温度をある値に管理し、該亜鉛粉等の
発生自体を抑制するようにしたり、あるいは、亜鉛粉等
を吸引回収する手段をサポート・ロール1の上方に設け
るようにしている。
2. Description of the Related Art In a continuous hot-dip galvanizing apparatus for a steel sheet shown in FIG. 2, in order to suppress the vibration of a plated steel strip 7 which is pulled up from a plating bath 4 and travels vertically upward at a high speed, the plating bath 4 and the A pair of support rolls 1 that contact and support both surfaces of the steel strip 7 are provided above the wiping nozzle 5 for adjusting the amount of adhesion. Then, zinc powder and zinc fume (hereinafter collectively referred to as zinc powder and the like) blown from the support roll 1 or the wiping nozzle 5 are scattered in the air near the support roll 1. In order to prevent the scattering of the zinc powder and the like, the surface temperature of the support roll 1 and the surface temperature of the steel strip 7 to be contacted were previously controlled to a certain value to suppress the generation of the zinc powder and the like. Or a means for sucking and collecting zinc powder or the like is provided above the support roll 1.

【0003】この吸引回収手段として、例えば、特開平
10−226859号公報は、図3(a)及び(b)に
示すように、サポート・ロール1の上方に、該ロール1
を覆い、飛散する亜鉛粉等を吸引するフード(以下、集
塵フード2という)と、該集塵フード2に連通し、走行
する鋼帯7が随伴する上昇気流を遮る遮蔽板8とを設
け、且つ該遮蔽板8を下記式を満足するようにした集塵
装置を提案している。なお、当然のことながら、この集
塵フード2は、亜鉛粉等を回収するバッグ・フィルタ等
9を介して、吸引ファン10に連結されている。
[0003] For example, Japanese Patent Application Laid-Open No. Hei 10-226859 discloses a suction / recovery means in which a roll 1 is provided above a support roll 1 as shown in FIGS. 3 (a) and 3 (b).
(Hereinafter referred to as a dust collecting hood 2) for covering the surface of the container and sucking the scattered zinc powder and the like, and a shielding plate 8 communicating with the dust collecting hood 2 and blocking an upward airflow accompanied by a traveling steel strip 7 is provided. In addition, a dust collector in which the shielding plate 8 satisfies the following expression is proposed. Naturally, the dust collecting hood 2 is connected to a suction fan 10 via a bag / filter 9 for collecting zinc powder and the like.

【0004】30°≦θ、 且つ5mm≦d<30 ここで、θは、サポート・ロール1の中心Aを通る水平
線にAで直角に交わる垂線Bと、集塵フード2に連通し
ていない遮蔽板8の端部Cとを結ぶ直線で形成される角
度であり、また、dは、AとCとを結ぶ直線のうちCか
らサポート・ロールの表面までの距離である。
30 ° ≦ θ and 5 mm ≦ d <30 Here, θ is a vertical line B which intersects a horizontal line passing through the center A of the support roll 1 at a right angle with A, and a shield not communicating with the dust collecting hood 2. An angle formed by a straight line connecting the end C of the plate 8 and d is a distance from C of the straight line connecting A and C to the surface of the support roll.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、前記亜
鉛粉の発生自体を抑制する方法では、鋼帯7の走行速度
(ライン速度ともいう)、板厚、溶融亜鉛めっき浴温度
等の値に応じて、サポート・ロール1の高さや水平方向
位置を調整する必要がある。そのため、めっき装置は、
この調整のためのスペースやコストが余分に必要とな
る。また、ライン速度等の変更時は、所謂「非定常状
態」になるが、その時のサポート・ロール高さや位置の
調整が難しく、亜鉛粉の発生、飛散を完全に防止できな
いという問題があった。特に、亜鉛粉等の鋼帯7表面へ
の再付着に起因する鋼板表面の性状劣化が重視される場
合には、サポート・ロール1を使用できないという問題
もあった。
However, in the method of suppressing the generation of zinc powder itself, the method of controlling the running speed (also referred to as line speed) of the steel strip 7, the thickness of the steel strip, the temperature of the hot-dip galvanizing bath, and the like are used. It is necessary to adjust the height and the horizontal position of the support roll 1. Therefore, the plating equipment
Extra space and cost are needed for this adjustment. Further, when the line speed or the like is changed, a so-called "unsteady state" occurs, but it is difficult to adjust the height and position of the support roll at that time, and there is a problem that generation and scattering of zinc powder cannot be completely prevented. In particular, there is a problem that the support roll 1 cannot be used when the property deterioration of the steel sheet surface due to the reattachment of zinc powder or the like to the surface of the steel strip 7 is emphasized.

【0006】一方、特開平10−226859号公報記
載の集塵装置は、鋼帯7面とサポート・ロール1とが接
触していない側の遮蔽板8の位置を詳しく限定している
が、優れた集塵効率が得られるものでなかった。
On the other hand, in the dust collector disclosed in Japanese Patent Application Laid-Open No. 10-226859, the position of the shield plate 8 on the side where the surface of the steel strip 7 is not in contact with the support roll 1 is limited in detail. Dust collection efficiency was not obtained.

【0007】本発明は、かかる事情に鑑み、亜鉛粉等を
従来より効率良く吸収可能な溶融亜鉛めっき浴上の集塵
フードを提供することを目的としている。
The present invention has been made in view of the above circumstances, and has as its object to provide a dust collecting hood on a hot-dip galvanizing bath capable of absorbing zinc powder and the like more efficiently than before.

【0008】[0008]

【課題を解決するための手段】発明者は、上記目的を達
成するため、亜鉛粉等の発生状況を詳細に解析した。そ
の結果、亜鉛粉等は、鋼帯とサポート・ロールの接触す
る部分で多く発生しているので、集塵フードの鋼帯側吸
引口の位置が、集塵を効率的に行うために重要であるこ
とを見い出し、その知見を基にして対策を検討し、その
成果を発明に具現化した。
Means for Solving the Problems In order to achieve the above-mentioned object, the inventor has analyzed the occurrence of zinc powder and the like in detail. As a result, zinc powder and the like are generated in large amounts at the contact points between the steel strip and the support rolls.Therefore, the position of the steel strip side suction port of the dust collection hood is important for efficient dust collection. They found something, examined the measures based on the knowledge, and embodied the results in the invention.

【0009】すなわち、本発明は、溶融亜鉛めっき浴か
ら引き上げられた鋼帯の両面に接触し、該鋼帯を支持す
る一対のサポート・ロールの上方を覆い、該サポート・
ロールの近傍で飛散している亜鉛粉及び亜鉛ヒュームを
吸引する開口部を備えた集塵フードにおいて、前記集塵
フードの開口部が、下記条件を満足することを特徴とす
る溶融亜鉛めっき浴上の集塵フードである。
That is, the present invention covers the pair of support rolls that contact both surfaces of a steel strip pulled up from a hot-dip galvanizing bath and support the steel strip.
In a dust collecting hood provided with an opening for sucking zinc powder and zinc fume scattered in the vicinity of a roll, the opening of the dust collecting hood may satisfy the following conditions: Dust hood.

【0010】 5mm≦D≦40mm、0.5mm≦L≦40mm ここで、Dは、側断面でみた、該開口部の鋼帯側端部E
と鋼帯表面間の水平間隔であり、また、Lは、サポート
・ロール中心軸Cと前記Eとを結ぶ直線のうち、Eから
サポート・ロールの表面までの距離である。さらに、5
mm≦D≦25mm、0.5mm≦L≦10mmである
と一層好ましい。
5 mm ≦ D ≦ 40 mm, 0.5 mm ≦ L ≦ 40 mm Here, D is a steel strip side end E of the opening as viewed in a side cross section.
L is the distance from E of the straight line connecting the center axis C of the support roll and E to the surface of the support roll. In addition, 5
More preferably, mm ≦ D ≦ 25 mm and 0.5 mm ≦ L ≦ 10 mm.

【0011】また、本発明は、前記集塵フードをサポー
ト・ロールの移動と連動自在にしたことを特徴とする溶
融亜鉛めっき浴上の集塵フードでもある。
Further, the present invention is also a dust collecting hood on a hot dip galvanizing bath, wherein the dust collecting hood is made movable in conjunction with the movement of a support roll.

【0012】本発明では,鋼帯とサポート・ロールとが
接触し、最も亜鉛粉等の発生が多い部分に集塵フードの
開口部を可能な限り、近づけるようにしたので、溶融亜
鉛めっき浴上での亜鉛粉等の飛散をほぼ完全に、且つ余
分な空気を吸引することなく効率的に防止できるように
なる。その結果、サポート・ロールの常時使用が可能に
なり、亜鉛粉等の再付着に起因する鋼帯の外観不良が解
消されるようになる。また、めっき装置の省スペース及
び設備コストの低減も達成される。さらに、集塵フード
の位置を、サポート・ロールの移動に応じて連動するよ
うにしたので、位置変更時の作業が円滑に行なえるよう
になる。
In the present invention, since the steel strip and the support roll come into contact with each other and the opening of the dust collecting hood is brought as close as possible to a portion where zinc powder and the like are most frequently generated, so that the hot dip galvanizing bath can be used. Can be prevented almost completely and efficiently without sucking extra air. As a result, the support roll can be used at all times, and the appearance defect of the steel strip due to the reattachment of the zinc powder or the like is eliminated. Further, space saving and reduction in equipment cost of the plating apparatus are also achieved. Further, since the position of the dust collecting hood is interlocked in accordance with the movement of the support roll, the work at the time of changing the position can be performed smoothly.

【0013】[0013]

【発明の実施の形態】以下、本発明をなすに至った経緯
もまじえ、本発明の実施の形態を説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below, taking into account the circumstances that led to the present invention.

【0014】まず、発明者は、前記したように、亜鉛粉
等の形態及び発生箇所の詳細な調査によって、鋼帯7と
サポート・ロール1との接触する側で、亜鉛粉等の飛散
が著しいことを知った。そして、前記した図3(a)及
び(b)に記載された集塵装置では、その部分を集中的
に吸気することは難しいと判断した。その理由は、図3
(b)から明らかなように、鋼帯7とサポート・ロール
1の接触側で、集塵フード2内の空間12が大き過ぎる
からである。つまり、該フード2の開口部直前(遮蔽板
8とロールの隙間)の負圧を一定(例えば、−10mm
Aq)とした場合、この空間12が大きいと、矢印aで
示す漏風の吸引量が増え、本来吸引すべき部分の空気の
吸引量が減ってしまう。
First, as described above, the inventor conducted a detailed investigation of the form and generation location of zinc powder and the like, and found that zinc powder and the like were significantly scattered on the side where the steel strip 7 and the support roll 1 were in contact. I knew that. Then, in the dust collecting apparatus described in FIGS. 3A and 3B, it was determined that it was difficult to intensively inhale the portion. The reason is shown in Figure 3.
This is because the space 12 in the dust collecting hood 2 is too large on the contact side between the steel strip 7 and the support roll 1 as is apparent from FIG. That is, the negative pressure immediately before the opening of the hood 2 (the gap between the shielding plate 8 and the roll) is kept constant (for example, −10 mm).
In the case of Aq), when the space 12 is large, the suction amount of the air leak indicated by the arrow a increases, and the suction amount of the air of the portion that should be suctioned decreases.

【0015】そこで、本発明では、図1及び4に示すよ
うに、集塵フードの形状を変更して該空間12の容積を
低減し、亜鉛粉等の集中的な吸引を可能にしたのであ
る。具体的には、下記式を満足させることである。
Therefore, in the present invention, as shown in FIGS. 1 and 4, the shape of the dust collecting hood is changed to reduce the volume of the space 12, thereby enabling intensive suction of zinc powder and the like. . Specifically, the following expression must be satisfied.

【0016】 5mm≦D≦40mm、0.5mm≦L≦40mm ここで、Dは、図4に詳細に示すように、側断面でみ
て、開口部3の鋼帯側端部Eと鋼帯表面間の水平間隔で
あり、また、Lは、サポート・ロール中心軸Cと前記E
とを結ぶ直線のうち、Eからサポート・ロール1の表面
までの距離である。
5 mm ≦ D ≦ 40 mm, 0.5 mm ≦ L ≦ 40 mm Here, as shown in detail in FIG. 4, D is the steel strip side end E of the opening 3 and the steel strip surface in a side cross section. L is a horizontal distance between the support roll center axis C and the E.
Is the distance from E to the surface of the support roll 1 among the straight lines connecting

【0017】このように、D及びLを限定したのは、D
が5mm未満では、振動している鋼帯7が、集塵フード
2の端部Eと接触する恐れがあるからであり、40mm
を超えると、水平間隙Dからの漏風量が増え、亜鉛粉等
の吸引効率が低下するからである。また、Lが0.5m
m未満では、集塵フード2の開口部3がサポート・ロー
ル1に接触する恐れがあり、40mmを超えると、水平
間隙Dからの漏風量が増え、亜鉛粉等の吸引効率が低下
するからである。
The reason why D and L are limited is that D
Is less than 5 mm, the vibrating steel strip 7 may come into contact with the end E of the dust collecting hood 2,
This is because, if it exceeds, the amount of air leaking from the horizontal gap D increases, and the suction efficiency of zinc powder and the like decreases. L is 0.5m
If it is less than m, the opening 3 of the dust collecting hood 2 may come into contact with the support roll 1, and if it exceeds 40 mm, the amount of air leakage from the horizontal gap D increases, and the suction efficiency of zinc powder and the like decreases. is there.

【0018】次に、発明者は、操業中にサポート・ロー
ル1の位置変更があることに注目した。その場合、上記
条件を満足させるには、集塵フード2の位置も変更する
必要が生じる。その変更中は、非定常状態になるので、
操業を停止したり、あるいは亜鉛粉等の飛散が無視され
ることになる。そこで、本発明では、集塵フード2をサ
ポート・ロール1の移動と連動させ、いかなる場合でも
常に上記条件を満足できるようにした。具体的には、サ
ポート・ロール1の移動量情報を入出力するコンピュー
タ(図示せず)と、出力に従って作動する集塵フード2
の移動手段(図示せず)とを備えるようにした。この移
動手段は、公知のシリンダ等を利用したもので十分であ
る。
Next, the inventor noticed that there was a change in the position of the support roll 1 during operation. In that case, it is necessary to change the position of the dust collecting hood 2 in order to satisfy the above condition. During that change, it will be in an unsteady state,
The operation is stopped, or the scattering of zinc powder or the like is ignored. Therefore, in the present invention, the dust collecting hood 2 is interlocked with the movement of the support roll 1 so that the above condition is always satisfied in any case. Specifically, a computer (not shown) for inputting and outputting movement amount information of the support roll 1 and a dust collection hood 2 that operates according to the output
(Not shown). It is sufficient for the moving means to use a known cylinder or the like.

【0019】これによって、サポート・ロール1の高さ
や水平方向位置の変更があっても、変更前と同じ条件を
維持したままで、集塵フード2の位置が変更でき、めっ
き操業や集塵作業に与えるサポート・ロール位置変更の
悪影響が容易に解消される。
Thus, even if the height and the horizontal position of the support roll 1 are changed, the position of the dust collecting hood 2 can be changed while maintaining the same conditions as before the change, and the plating operation and the dust collecting operation can be performed. The adverse effect of changing the position of the support roll on the vehicle can be easily eliminated.

【0020】鋼帯とサポートロールとが接触し、最も亜
鉛粉等の発生が多い部分に集塵フードの開口部を可能な
限り近づけると、前記DとLの上限は、Dは25mm、
Lは10mmとする方が一層良いことがわかった。これ
により、さらに、溶融亜鉛めっき上での亜鉛粉等飛散を
完全に且つ余分な空気を吸引することなく効率的に防止
できるようになるからである。
When the steel strip comes into contact with the support roll and the opening of the dust collecting hood is brought as close as possible to a portion where zinc powder and the like are generated most, the upper limits of D and L are as follows: D is 25 mm;
It was found that L was more preferably 10 mm. Thereby, the scattering of zinc powder and the like on the hot-dip galvanized coating can be completely and efficiently prevented without sucking extra air.

【0021】[0021]

【実施例】図1の本発明に係る溶融亜鉛めっき浴4上の
集塵フード2を、実際の溶融亜鉛めっき鋼板の連続製造
に適用した。めっき浴4は、公知の溶融亜鉛めっき浴で
あり、該めっき浴4の温度は、450℃に,浴浸入時の
板温は、470℃である。また、鋼帯7は、極低炭素鋼
で操業中に板厚の変更も行なった。板厚の変更時には、
サポート・ロール1の位置変更も行なったが、集塵フー
ド2はそれと連動させて移動した。めっき付着量は、ワ
イピング・ノズル5の使用で40g/m2に調整した。
なお、吸引ファン10の能力は、150m3/分の空気
量を吸引できるものである。また、効果を比較するた
め、図3の特開平10−226859号公報記載の装置
を用いた操業も行なった。なお、その際の条件は、θ=
40°、d=10mmである。
EXAMPLE A dust collecting hood 2 on a hot-dip galvanizing bath 4 according to the present invention shown in FIG. 1 was applied to actual continuous production of hot-dip galvanized steel sheets. The plating bath 4 is a known hot-dip galvanizing bath. The temperature of the plating bath 4 is 450 ° C., and the plate temperature at the time of bath immersion is 470 ° C. The thickness of the steel strip 7 was also changed during the operation of the ultra low carbon steel. When changing the thickness,
The position of the support roll 1 was also changed, but the dust collecting hood 2 was moved in conjunction therewith. The plating adhesion amount was adjusted to 40 g / m 2 by using the wiping nozzle 5.
The suction fan 10 is capable of sucking 150 m 3 / min of air. Further, in order to compare the effects, an operation using the apparatus described in JP-A-10-226859 in FIG. 3 was also performed. The condition at that time is θ =
40 ° and d = 10 mm.

【0022】板厚の変更に対応させ、集塵状況を表1に
一括して示す。表1より、本発明に係る集塵フード2を
使用すると、亜鉛粉の回収量が従来のものより格段に増
加している。これは、浴上サポート・ロール架台、合金
化炉内等への亜鉛粉の飛散が防止できていることを示唆
するものである。また、堆積した亜鉛粉の鋼帯表面の再
付着に起因した表面外観の不良も防止されていることも
明らかである。
Table 1 collectively shows the dust collection status in accordance with the change in the plate thickness. According to Table 1, when the dust collecting hood 2 according to the present invention is used, the recovery amount of zinc powder is remarkably increased as compared with the conventional one. This suggests that the scattering of zinc powder into the support / roll stand on the bath, the inside of the alloying furnace, and the like can be prevented. It is also clear that poor surface appearance due to re-adhesion of the deposited zinc powder to the steel strip surface is also prevented.

【0023】[0023]

【表1】 [Table 1]

【0024】[0024]

【発明の効果】以上述べたように、本発明により、浴上
サポートロールから発生する亜鉛粉等が効率良く吸引で
きるようになった。その結果、亜鉛粉飛散に起因する鋼
帯表面の外観不良が防止され、亜鉛飛散による周辺機
器、作業環境への悪影響をも防止できた。さらに、サポ
ート・ロールの位置変更の場合でも、集塵フードをサポ
ートロールの移動と連動させることにより、めっき操業
の管理が容易になるという効果もあった。
As described above, according to the present invention, zinc powder and the like generated from the support roll on the bath can be efficiently sucked. As a result, the appearance defect of the steel strip surface caused by the scattering of zinc powder was prevented, and the adverse effects on the peripheral equipment and the working environment due to the scattering of zinc were also prevented. Furthermore, even in the case of changing the position of the support roll, there is an effect that the operation of the plating operation can be easily controlled by linking the dust collecting hood with the movement of the support roll.

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

【図1】本発明に係る溶融亜鉛めっき浴上の集塵フード
を説明する縦断面図である。
FIG. 1 is a longitudinal sectional view illustrating a dust collecting hood on a hot dip galvanizing bath according to the present invention.

【図2】一般的な連続溶融亜鉛めっき装置を示す縦断面
図である。
FIG. 2 is a longitudinal sectional view showing a general continuous hot-dip galvanizing apparatus.

【図3】従来の溶融亜鉛めっき浴の集塵装置を示す図で
あり、(a)は全体を、(b)はフードの詳細を説明す
る図である。
3A and 3B are diagrams illustrating a conventional dust collector for a hot-dip galvanizing bath, wherein FIG. 3A illustrates the entirety and FIG. 3B illustrates details of a hood.

【図4】本発明に係る溶融亜鉛めっき浴上の集塵フード
の詳細を説明する縦断面図である。
FIG. 4 is a longitudinal sectional view illustrating details of a dust collecting hood on a hot dip galvanizing bath according to the present invention.

【符号の説明】[Explanation of symbols]

1 サポート・ロール 2 集塵フード 3 開口部 4 溶融亜鉛めっき浴(めっき浴) 5 ワイピング・ノズル 6 合金化炉 7 鋼帯 8 遮蔽板 9 バック・フィルタ等 10 吸引ファン 11 シンク・ロール 12 空間 DESCRIPTION OF SYMBOLS 1 Support roll 2 Dust collection hood 3 Opening 4 Hot-dip galvanizing bath (plating bath) 5 Wiping nozzle 6 Alloying furnace 7 Steel strip 8 Shielding plate 9 Back filter etc. 10 Suction fan 11 Sink roll 12 Space

───────────────────────────────────────────────────── フロントページの続き (72)発明者 斉藤 滋之 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社千葉製鉄所内 (72)発明者 中島 宏幸 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社千葉製鉄所内 (72)発明者 新井 信 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社千葉製鉄所内 (72)発明者 筋田 成子 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社千葉製鉄所内 Fターム(参考) 4K027 AA02 AA22 AB42 AD08 AD09 AD16 AE04 AE37  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeyuki Saito 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside the Chiba Works, Steelworks (72) Inventor Hiroyuki Nakajima 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Inside the Chiba Works, Steel Works Co., Ltd. (72) Inventor Shin Arai, 1, Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Inside the Chiba Works, Kawasaki Steel Works, Ltd. 4K027 AA02 AA22 AB42 AD08 AD09 AD16 AE04 AE37 Inside the Chiba Works of Kawasaki Steel Corporation

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 溶融亜鉛めっき浴から引き上げられた鋼
帯の両面に接触し、該鋼帯を支持する一対のサポート・
ロールの上方を覆い、該サポート・ロールの近傍で飛散
している亜鉛粉及び亜鉛ヒュームを吸引する開口部を備
えた集塵フードにおいて、 前記集塵フードの開口部が、下記条件を満足することを
特徴とする溶融亜鉛めっき浴上の集塵フード。 5mm≦D≦40mm、0.5mm≦L≦40mm ここで、Dは、側断面でみた、該開口部の鋼帯側端部E
と鋼帯表面間の水平間隔であり、また、Lは、サポート
・ロール中心軸Cと前記Eとを結ぶ直線のうち、Eから
サポート・ロールの表面までの距離である。
A pair of support members for contacting and supporting both sides of a steel strip pulled up from a hot dip galvanizing bath.
In a dust collecting hood covering an upper part of a roll and sucking zinc powder and zinc fume scattered in the vicinity of the support roll, the opening of the dust collecting hood satisfies the following conditions. Dust collecting hood on hot-dip galvanizing bath. 5 mm ≦ D ≦ 40 mm, 0.5 mm ≦ L ≦ 40 mm Here, D is a steel strip side end E of the opening as viewed in a side cross section.
L is the distance from E of the straight line connecting the center axis C of the support roll and E to the surface of the support roll.
【請求項2】 前記集塵フードの開口部が、下記条件を
満足することを特徴とする請求項1記載の溶融亜鉛めっ
き浴上の集塵フード。 5mm≦D≦25mm、0.5mm≦L≦10mm
2. The dust collecting hood on a hot dip galvanizing bath according to claim 1, wherein the opening of the dust collecting hood satisfies the following conditions. 5mm ≦ D ≦ 25mm, 0.5mm ≦ L ≦ 10mm
【請求項3】 前記集塵フードをサポート・ロールの移
動と連動自在にしたことを特徴とする請求項1又は2記
載の溶融亜鉛めっき浴上の集塵フード。
3. The dust collecting hood on a hot-dip galvanizing bath according to claim 1, wherein the dust collecting hood is movable in association with the movement of a support roll.
JP36889999A 1999-03-15 1999-12-27 Dust collection hood on hot dip galvanizing bath Expired - Fee Related JP4359984B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP36889999A JP4359984B2 (en) 1999-03-15 1999-12-27 Dust collection hood on hot dip galvanizing bath

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6763999 1999-03-15
JP11-67639 1999-03-15
JP36889999A JP4359984B2 (en) 1999-03-15 1999-12-27 Dust collection hood on hot dip galvanizing bath

Publications (3)

Publication Number Publication Date
JP2000328213A true JP2000328213A (en) 2000-11-28
JP2000328213A5 JP2000328213A5 (en) 2006-11-30
JP4359984B2 JP4359984B2 (en) 2009-11-11

Family

ID=26408857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP36889999A Expired - Fee Related JP4359984B2 (en) 1999-03-15 1999-12-27 Dust collection hood on hot dip galvanizing bath

Country Status (1)

Country Link
JP (1) JP4359984B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100504367B1 (en) * 2000-12-08 2005-07-28 주식회사 포스코 Apparatus for recovering the Zinc powder in the CGL
JP2010196135A (en) * 2009-02-26 2010-09-09 Jfe Steel Corp Device for collecting plating powder of hot-dip plating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100504367B1 (en) * 2000-12-08 2005-07-28 주식회사 포스코 Apparatus for recovering the Zinc powder in the CGL
JP2010196135A (en) * 2009-02-26 2010-09-09 Jfe Steel Corp Device for collecting plating powder of hot-dip plating

Also Published As

Publication number Publication date
JP4359984B2 (en) 2009-11-11

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