JPH0538045Y2 - - Google Patents
Info
- Publication number
- JPH0538045Y2 JPH0538045Y2 JP13544489U JP13544489U JPH0538045Y2 JP H0538045 Y2 JPH0538045 Y2 JP H0538045Y2 JP 13544489 U JP13544489 U JP 13544489U JP 13544489 U JP13544489 U JP 13544489U JP H0538045 Y2 JPH0538045 Y2 JP H0538045Y2
- Authority
- JP
- Japan
- Prior art keywords
- shielding plate
- sink roll
- plating tank
- plate
- bottom dross
- 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.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims 1
- 238000007747 plating Methods 0.000 description 22
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000005246 galvanizing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 210000004894 snout Anatomy 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、溶融金属めつき、特に溶融亜鉛め
つきにおけるボトムドロスの巻上げを抑制する装
置に関するものである。[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a device for suppressing the winding up of bottom dross in molten metal plating, particularly in hot-dip galvanizing.
（従来の技術）
溶融亜鉛めつきは耐食性に優れ、しかも処理費
が比較的安価であることから、鋼板をはじめ各種
の鋼材に適用されている。第４図は鋼板の溶融亜
鉛めつき装置を示したもので、スナウト１１を経
て溶融亜鉛めつき槽１２に導かれた鋼板１３はシ
ンクロール１４を回周しながらめつきされ、コレ
クテイングロール１５に案内されてめつき槽１２
から引き上げられる。(Prior Art) Hot-dip galvanizing has excellent corrosion resistance and is relatively inexpensive, so it is applied to various steel materials including steel plates. FIG. 4 shows a hot-dip galvanizing apparatus for steel sheets. A steel sheet 13 is guided through a snout 11 to a hot-dip galvanizing tank 12, and is plated while rotating around a sink roll 14. Guided to plating tank 12
be lifted up from
この溶融亜鉛めつきでは亜鉛浴を通過する鋼板
から鉄が溶出し、亜鉛と反応してFeZn7を主成分
とする金属間化合物が生成し、これが次第にめつ
き槽底部に溜まり、第４図において符号１６で示
すボトムドロスとなる。めつき槽底部に堆積した
ボトムドロスは、めつき時においてシンクロール
１４の下部付近で生じる鋼板の随伴流によつて浴
中に巻上げられて鋼板表面に付着し、めつき皮膜
外観の品質を損ねたり、ドロスブツと称する不均
一部分が形成される結果、局部電池を形成し、耐
食性を低下させる。 In this hot-dip galvanizing, iron is eluted from the steel sheet passing through the zinc bath, reacts with the zinc, and forms an intermetallic compound whose main component is FeZn 7. This gradually accumulates at the bottom of the plating tank, and as shown in Figure 4. This results in bottom dross indicated by reference numeral 16. The bottom dross accumulated at the bottom of the plating tank is rolled up into the bath by the accompanying flow of the steel plate generated near the bottom of the sink roll 14 during plating and adheres to the surface of the steel plate, impairing the quality of the appearance of the plating film. , non-uniform areas called dross are formed, resulting in the formation of local batteries and deterioration of corrosion resistance.
従来、上記のようなボトムドロスの付着を防止
する手段として、Feとの親和力がZnよりも強い
Alを利用する方法が知られている。これは、浴
中のAl濃度を高め、下記の置換反応をおこさせ
てFe−Znの金属間化合物をZnより比重の軽い
Fe2Al5として浴上部にトツプドロス（第４図の
符号１７）として浮上させて回収する方法であ
る。 Conventionally, as a means to prevent the adhesion of bottom dross as described above, ferrite, which has a stronger affinity with Fe than Zn, has been used.
A method using Al is known. This is done by increasing the Al concentration in the bath, causing the following substitution reaction, and converting the Fe-Zn intermetallic compound, which has a lighter specific gravity than Zn.
This is a method of recovering Fe 2 Al 5 by floating it to the top of the bath as a top loss (numeral 17 in Figure 4).
2FeZn7＋5Al→Fe2Al5＋14Zn
しかし、この方法には次に述べるような難点が
ある。 2FeZn 7 +5Al→Fe 2 Al 5 +14Zn However, this method has the following drawbacks.
連続式溶融亜鉛めつきでは、同一ラインでめつ
きのままの状態の通常の溶融亜鉛めつき鋼板と、
めつき後に合金化処理する合金化溶融亜鉛めつき
鋼板とが製造されている。Alはボトムドロスを
少なくする作用がある反面、合金化処理過程での
合金化反応を抑制する作用をも有する。このため
合金化溶融亜鉛めつき鋼板の製造においては、浴
中のAlは可及的に少ない方がよい。 In continuous hot-dip galvanizing, normal hot-dip galvanized steel sheets are coated on the same line, and
Alloyed hot-dip galvanized steel sheets are manufactured which are subjected to alloying treatment after plating. While Al has the effect of reducing bottom dross, it also has the effect of suppressing the alloying reaction during the alloying process. For this reason, in the production of alloyed hot-dip galvanized steel sheets, it is better to reduce the amount of Al in the bath as much as possible.
このようなことから、Al添加を行わないでト
ツプドロスの付着を抑制する方法が求められてい
る。 For this reason, there is a need for a method of suppressing the adhesion of top dross without adding Al.
第５図は、本出願人が先に特許出願（特開平１
−86580号）したボトムドロスの巻き上げ抑制装
置である。この装置では、シンクロール１４とめ
つき槽１２の底面との間に配置された遮蔽板１８
によつて、鋼板１３の通板に伴う随伴流の影響が
ボトムドロス１６まで及ぶことがないので、ボト
ムドロス１６が浴中に巻き上げられ、鋼板表面に
付着することが少ない。 Figure 5 shows that the present applicant filed a patent application (Japanese Patent Laid-Open No.
-86580) is a bottom dross roll-up suppressing device. In this device, a shielding plate 18 is disposed between the sink roll 14 and the bottom of the plating tank 12.
As a result, the influence of the accompanying flow accompanying the passing of the steel plate 13 does not reach the bottom dross 16, so that the bottom dross 16 is rarely rolled up in the bath and attached to the surface of the steel plate.
ところが、この装置を長期間使用し、ボトムド
ロスが遮蔽板の下に堆積し、固着する量が多くな
ると、遮蔽板を押上げてしまうことがある。遮蔽
板が押上げられるとボトムドロスの巻き上げ抑止
効果が減少する他に、甚だしい場合には遮蔽板と
鋼板が接触して表面に疵を付ける。そして、この
ようなトラブルが発生しても、浴中から遮蔽板を
取り出すのが容易ではない。遮蔽板とシンクロー
ルを支持するハウジングとが分離しているから、
遮蔽板を取り出すにはまずハウジング、即ち、シ
ンクロールを取り出さねばならず、これらの引き
上げ作業およびその後の据え付け作業に時間がか
かる。 However, if this device is used for a long period of time and a large amount of bottom dross accumulates and sticks under the shielding plate, the shielding plate may be pushed up. If the shielding plate is pushed up, not only will the effect of preventing the bottom dross from rolling up be reduced, but in extreme cases, the shielding plate and the steel plate will come into contact and cause scratches on the surface. Even if such trouble occurs, it is not easy to remove the shielding plate from the bath. Because the shield plate and the housing that supports the sink roll are separated,
In order to take out the shielding plate, it is first necessary to take out the housing, that is, the sink roll, and it takes time to pull it up and then install it.
（考案が解決しようとする課題）
この考案の課題は、めつき槽への据え付けおよ
び取り出しが容易で、しかも、確実にボトムドロ
スの付着を抑制することができる装置を提供する
ことにある。(Problems to be Solved by the Invention) An object of the invention is to provide an apparatus that is easy to install and take out from a plating tank, and which can reliably suppress the attachment of bottom dross.
（課題を解決するための手段）
この考案の要旨は、第１図および第２図に示す
ように、シンクロール２とコレクテイングロール
３を支持するハウジング４の下部に取付けアーム
８で取りつけた遮蔽板７を有するボトムドロスの
巻上げ抑制装置にある。前記ハウジング４は、第
２図に示すようにめつき槽１の縁に架け渡して設
置されるが、その際、遮蔽板７はめつき槽底面か
ら一定の距離を有するようになつている。(Means for Solving the Problems) The gist of this invention is that, as shown in FIGS. 1 and 2, a shielding arm 8 is attached to the lower part of a housing 4 that supports a sink roll 2 and a collecting roll 3. The bottom dross winding suppressing device has a plate 7. The housing 4 is installed over the edge of the plating tank 1, as shown in FIG. 2, with the shielding plate 7 being a certain distance from the bottom of the plating tank.
（実施例）
以下、添付図面を参照してこの考案を説明す
る。(Example) This invention will be described below with reference to the accompanying drawings.
第１図は、この考案にかかるボトムドロスの巻
上げ抑制装置の一実施例を示す横断面図、第２図
は第１図のＡ−Ａ線に沿う縦断面図である。 FIG. 1 is a cross-sectional view showing an embodiment of the bottom dross winding-up suppressing device according to the present invention, and FIG. 2 is a vertical cross-sectional view taken along line A--A in FIG. 1.
図中１は例えば溶融亜鉛を収容するめつき槽、
２はシンクロール、３はコレクテイングロールで
ある。シンクロール２と一対のコレクテイングロ
ール３は、第２図に示すようにめつき槽１の縁に
架け渡して設置されているハウジング４に支持さ
れている。 In the figure, 1 is, for example, a plating tank containing molten zinc;
2 is a sink roll and 3 is a collecting roll. The sink roll 2 and the pair of collecting rolls 3 are supported by a housing 4 installed over the edge of the plating tank 1, as shown in FIG.
鋼板５はスナウト６からめつき槽１に入り、シ
ンクロール２を回周してコレクテイングロール３
に案内されてめつき浴から引き上げられめつきさ
れる。 The steel plate 5 enters the plating tank 1 through the snout 6, goes around the sink roll 2, and is transferred to the collecting roll 3.
He is guided out of the plating bath and is pegged.
図中７は断面Ｚ型の遮蔽板である。遮蔽板７は
シンクロール２から一定距離をおいて、且つ、ハ
ウジング４をめつき槽１に設置したときにめつき
槽底面から所定距離、例えば、めつき槽底面から
遮蔽板水平部が100〜300mm、遮蔽板先端部が400
〜500mm、遮蔽板後端部が50〜250mmとなるように
取付けアーム８を介してハウジング４の下部に取
付けられている。 In the figure, 7 is a shielding plate having a Z-shaped cross section. The shielding plate 7 is placed at a certain distance from the sink roll 2, and at a predetermined distance from the bottom of the plating tank when the housing 4 is installed in the plating tank 1, for example, the horizontal part of the shielding plate is at a distance of 100° to 300mm, the tip of the shield plate is 400mm
It is attached to the lower part of the housing 4 via the attachment arm 8 so that the distance of the rear end of the shield plate is 500 mm to 500 mm and the rear end of the shield plate is 50 to 250 mm.
従つて、遮蔽板７の取り出しおよび据え付けを
シンクロール２と一緒に行うことができる。この
ため作業工程が簡略化されるとともに、シンクロ
ール２の定期的な交換に伴せて遮蔽板７の取り出
しおよび据え付けを行うことができる。従つて、
遮蔽板７とめつき槽１の底面との間にボトムドロ
ス（図示せず）の過剰の堆積が起これば、これを
除去することも容易である。そして、鋼板５の走
行に伴う随伴流の影響は遮蔽板７によつて抑制さ
れるので、遮蔽板７とめつき槽１の底面との間に
溜まつたボトムドロスが巻き上げられることがな
い。 Therefore, the shielding plate 7 can be taken out and installed together with the sink roll 2. Therefore, the work process is simplified, and the shielding plate 7 can be taken out and installed in conjunction with periodic replacement of the sink roll 2. Therefore,
If excessive accumulation of bottom dross (not shown) occurs between the shielding plate 7 and the bottom surface of the plating tank 1, it is easy to remove it. Since the effect of accompanying flow accompanying the traveling of the steel plate 5 is suppressed by the shielding plate 7, the bottom dross accumulated between the shielding plate 7 and the bottom surface of the plating tank 1 is not rolled up.
この考案において、遮蔽板の形状は特に問わな
い。随伴流の影響を抑制することができる形状で
あれば、どのような形状であつてもよい。例え
ば、前記した断面形状がＺ型の他に、第３図に示
すような断面形状がＵ型、Ｌ型、逆Ｚ型、平板型
のものでも随伴流の影響を抑制する効果がある。 In this invention, the shape of the shielding plate is not particularly limited. It may have any shape as long as it can suppress the influence of the accompanying flow. For example, in addition to the above-mentioned Z-shaped cross-sectional shape, cross-sectional shapes such as U-shaped, L-shaped, inverted Z-shaped, and flat plate shapes as shown in FIG. 3 are also effective in suppressing the influence of accompanying flow.
（考案の効果）
以上説明したように、遮蔽板をめつき槽底面か
ら一定間隙を保つようにハウジングに取付けたこ
の考案の装置であれば、鋼板の走行に伴う随伴流
の影響を遮蔽板で抑制することができるので、ボ
トムドロスが鋼板表面に付着することがない。し
かも、遮蔽板の取り出しおよび据え付けをシンク
ロールの交換と一緒に行うことができるので、遮
蔽板とハウジングが分離した第５図に示す装置に
較べて、その作業時間が大幅に短縮できる。(Effects of the invention) As explained above, with the device of this invention in which the shielding plate is attached to the housing so as to maintain a constant gap from the bottom of the plating tank, the influence of the accompanying flow accompanying the running of the steel plate can be suppressed by the shielding plate. This prevents bottom dross from adhering to the surface of the steel plate. Moreover, since the shielding plate can be taken out and installed at the same time as the sink roll is replaced, the working time can be significantly reduced compared to the apparatus shown in FIG. 5 in which the shielding plate and the housing are separated.
第１図は、この考案にかかるボトムドロスの巻
上げ抑制装置の一実施例を示す横断面図、第２図
は、第１図のＡ−Ａ線に沿う縦断面図、第３図
は、遮蔽板の他の形状を示す断面図、第４図は、
従来の溶融金属めつきにおける各種ドロスの発生
状況の概略説明図、第５図は、本出願人が先に出
願したボトムドロスの巻上げ抑制装置の一例を示
す概略図、である。
１……めつき槽、２……シンクロール、３……
コレクテイングロール、４……ハウジング、５…
…鋼板、６……スナウト、７……遮蔽板、８……
取付けアーム。
FIG. 1 is a cross-sectional view showing an embodiment of the bottom dross lifting control device according to this invention, FIG. 2 is a vertical cross-sectional view taken along line A-A in FIG. 1, and FIG. 3 is a shielding plate. A sectional view showing another shape, FIG. 4, is
FIG. 5 is a schematic diagram illustrating the generation of various types of dross in conventional molten metal plating, and is a schematic diagram showing an example of a bottom dross curling suppressing device previously filed by the present applicant. 1... plating tank, 2... sink roll, 3...
Collection roll, 4...Housing, 5...
...Steel plate, 6...Snout, 7...Shielding plate, 8...
mounting arm.
Claims (1)
持するハウジングの下部に、シンクロールから一
定距離をおいて取付けた遮蔽板を有し、上記ハウ
ジングをめつき槽に設置したとき、遮蔽板がめつ
き槽底面から所定の間隙を保つことを特徴とする
ボトムドロスの巻上げ抑制装置。 The lower part of the housing that supports the sink roll and collecting roll has a shielding plate attached at a certain distance from the sink roll. A bottom dross winding suppression device that maintains a gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13544489U JPH0538045Y2 (en) | 1989-11-22 | 1989-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13544489U JPH0538045Y2 (en) | 1989-11-22 | 1989-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0374655U JPH0374655U (en) | 1991-07-26 |
| JPH0538045Y2 true JPH0538045Y2 (en) | 1993-09-27 |
Family
ID=31682712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13544489U Expired - Lifetime JPH0538045Y2 (en) | 1989-11-22 | 1989-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0538045Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8156890B2 (en) | 2006-05-26 | 2012-04-17 | Nippon Steel Corporation | Device for preventing winding-up of sheet metal in continuous hot-dipping bath |
-
1989
- 1989-11-22 JP JP13544489U patent/JPH0538045Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8156890B2 (en) | 2006-05-26 | 2012-04-17 | Nippon Steel Corporation | Device for preventing winding-up of sheet metal in continuous hot-dipping bath |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0374655U (en) | 1991-07-26 |
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