JP3437731B2 - Apparatus for preventing foreign matter generated in snout from adhering to steel sheet in hot dip plating - Google Patents
Apparatus for preventing foreign matter generated in snout from adhering to steel sheet in hot dip platingInfo
- Publication number
- JP3437731B2 JP3437731B2 JP33288896A JP33288896A JP3437731B2 JP 3437731 B2 JP3437731 B2 JP 3437731B2 JP 33288896 A JP33288896 A JP 33288896A JP 33288896 A JP33288896 A JP 33288896A JP 3437731 B2 JP3437731 B2 JP 3437731B2
- Authority
- JP
- Japan
- Prior art keywords
- foreign matter
- snout
- steel sheet
- hot dip
- adhering
- 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 - Fee Related
Links
Landscapes
- Coating With Molten Metal (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、亜鉛等の溶融金属
めっき時に発生する異物が鋼板に付着するのを防止する
溶融めっきにおけるスナウト内生成異物の鋼板付着防止
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel sheet adhesion preventive device for foreign matter generated in a snout during hot dip coating, which prevents foreign matter generated during hot metal plating such as zinc from adhering to a steel sheet.
【０００２】[0002]
【従来の技術】溶融金属めっきにおけるスナウト内にお
いては、酸化物やその他の化合物等が浮上し、これが鋼
板に付着するとめっき製品の品質を損なうという問題が
ある。そこで、特開平４−２７６０５２号公報に開示さ
れるように、スナウト内で通過するストリップの片側か
ら非酸化性ガスを吹き付けて、浮上する異物をスナウト
内の片側に偏らせてストリップに異物が付着するのを防
止していた。また、実開平７−６２６０号公報には、ス
ナウト内を通過するストリップの広幅面に指向し、更に
浴面方向に傾斜して非酸化性ガスを吹き出し、スナウト
内の異物をストリップ近傍から排除する装置が提案され
ている。2. Description of the Related Art Oxides and other compounds float in the snout of hot-dip galvanizing, and if they adhere to the steel sheet, the quality of the plated product is impaired. Therefore, as disclosed in JP-A-4-276052, a non-oxidizing gas is blown from one side of the strip passing in the snout to disperse the floating foreign matter to one side in the snout, and the foreign matter adheres to the strip. It was preventing it. In Japanese Utility Model Application Laid-Open No. 7-6260, the non-oxidizing gas is blown toward the wide surface of the strip passing through the snout and further inclined toward the bath surface to remove foreign matters in the snout from the vicinity of the strip. A device has been proposed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、特開平
４−２７６０５２号公報及び実開平７−６２６０号公報
記載の技術は、スナウト内部浴面に浮遊する異物のスト
リップの付着を防止し、スナウト内部の一端に異物を移
動させて排出するものであり、亜鉛浴のように蒸気圧が
高いメタル浴から発生するヒュームに起因する異物を鋼
板に付着させないようにすることは困難である。即ち、
亜鉛浴のように蒸気圧が高いメタル浴からはヒュームが
発生して傾斜配置されたスナウト内に付着して成長し、
ストリップ上に異物となって落下して付着するが、付着
した異物の除去に対しては従来の技術は全く効果が無か
った。本発明はかかる事情に鑑みてなされたもので、亜
鉛浴のように蒸気圧が高いメタル浴から発生するヒュー
ムに起因する異物がストリップ（鋼板）に付着するのを
防止する溶融めっきにおけるスナウト内生成異物の鋼板
付着防止装置を提供することを目的とする。However, the techniques described in JP-A-4-276052 and JP-A-7-6260 prevent the adhesion of foreign matter strips floating on the internal bath surface of the snout, and Since foreign matter is moved to one end and discharged, it is difficult to prevent foreign matter caused by fumes generated from a metal bath having a high vapor pressure such as a zinc bath from adhering to the steel sheet. That is,
From a metal bath with a high vapor pressure such as a zinc bath, fume is generated and adheres and grows in the slanted snout.
Although the foreign matter drops and adheres to the strip, the conventional technique has no effect on the removal of the adhered foreign matter. The present invention has been made in view of the above circumstances, and in-snaught formation in hot dip coating for preventing foreign substances caused by fumes generated from a metal bath having a high vapor pressure such as a zinc bath from adhering to a strip (steel plate). An object of the present invention is to provide a steel plate adhesion prevention device for foreign matter.
【０００４】[0004]
【課題を解決するための手段】前記目的に沿う請求項１
記載の溶融めっきにおけるスナウト内生成異物の鋼板付
着防止装置は、溶融めっきの浴槽に設置しているスナウ
ト内を通過する鋼板に異物の付着を防止する装置であっ
て、前記鋼板周囲の湯面の異物を除去する下向きノズル
の他に、前記鋼板の表裏側に上向きの非酸化性ガスの流
れを発生させる上向きノズルをそれぞれ設け、該鋼板に
付着する異物の除去を行っている。また、請求項２記載
の溶融めっきにおけるスナウト内生成異物の鋼板付着防
止装置は、請求項１記載の装置において、それぞれの前
記上向きノズルは、大径の主管の一方側に所定ピッチで
取付けられた多数の突出ノズルからなっている。なお、
非酸化性ガスのガス流の速度は、鋼板の表面で約８ｍ／
秒以上であれば十分である。A method according to the above-mentioned object.
The steel sheet adhesion preventing device for the foreign matter generated in the snout in the hot dip coating described above is a device for preventing the foreign matter from adhering to the steel sheet that passes through the snout installed in the bath of the hot dip plating, In addition to the downward nozzles for removing foreign matters, upward nozzles for generating upward flow of non-oxidizing gas are respectively provided on the front and back sides of the steel sheet to remove foreign matters adhering to the steel sheet. Further, the steel plate adhesion preventing device for foreign matter generated in snout in hot dip plating according to claim 2 is the device according to claim 1, wherein each of the upward nozzles is attached to one side of a large diameter main pipe at a predetermined pitch. It consists of many protruding nozzles. In addition,
The gas flow velocity of non-oxidizing gas is about 8 m /
More than a second is sufficient.
【０００５】請求項１、２記載の溶融めっきにおけるス
ナウト内生成異物の鋼板付着防止装置においては、下向
きノズルの他に鋼板の表裏側に上向きの非酸化性ガスの
ガス流を発生させる上向きノズルをそれぞれ設けている
ので、落下して鋼板に付着したヒューム等の異物やその
他の異物を除去することができる。特に、請求項２記載
の溶融めっきにおけるスナウト内生成異物の鋼板付着防
止装置においては、大径の主管の一方側に、所定のピッ
チで多数の突出ノズルを設けて上向きのガス流を発生さ
せているので、スリット式のノズルに比較して少量のガ
ス流で異物を除去できる。In the steel plate adhesion preventing device for foreign matter generated in snout in hot dip plating according to claims 1 and 2, in addition to the downward nozzle, an upward nozzle for generating upward gas flow of non-oxidizing gas is provided on the front and back sides of the steel plate. Since they are respectively provided, it is possible to remove foreign substances such as fumes and other foreign substances that have dropped and adhered to the steel plate. Particularly, in the steel plate adhesion preventing device for foreign matter generated in snout in hot dip plating according to claim 2, a large number of projecting nozzles are provided at one side of a large diameter main pipe at a predetermined pitch to generate an upward gas flow. Therefore, foreign matter can be removed with a small amount of gas flow as compared with the slit type nozzle.
【０００６】[0006]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。ここに、図１（Ａ）、（Ｂ）は本発
明の一実施の形態に係る溶融めっきにおけるスナウト内
生成異物の鋼板付着防止装置の説明図、図２（Ａ）、
（Ｂ）、（Ｃ）は同装置に使用するノズルの説明図であ
る。BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. Here, FIGS. 1 (A) and 1 (B) are explanatory views of a steel plate adhesion preventing device for foreign matter generated in a snout in hot dip plating according to an embodiment of the present invention, FIG. 2 (A),
(B), (C) is explanatory drawing of the nozzle used for the same apparatus.
【０００７】図１（Ａ）に示すように、本発明の一実施
の形態に係る溶融めっきにおけるスナウト内生成異物の
鋼板付着防止装置１０は、スナウト１１内に配置された
下向きノズル１２、１３と上向きノズル１４、１５とを
備えて構成されている。前記下向きノズル１２、１３
は、例えば実開平７−６２６０号公報に記載されている
ように、主管１６、１７に所定ピッチ（２０〜７０ｍ
ｍ）で取付けられた多数の小径管１８、１９からなって
いる。As shown in FIG. 1 (A), a steel plate adhesion preventing device 10 for foreign matter produced in a snout in hot dip plating according to an embodiment of the present invention has a downward nozzle 12, 13 arranged in a snout 11. It is configured to include upward nozzles 14 and 15. The downward nozzles 12, 13
Is, for example, as described in Japanese Utility Model Laid-Open No. 7-6260, the main pipes 16 and 17 have a predetermined pitch (20 to 70 m).
It consists of a large number of small-diameter tubes 18, 19 mounted in m).
【０００８】そして、下向きノズル１２、１３を構成す
る各小径管１８、１９と鋼板２０との成す角度は約３０
度となって、鋼板２０に対して下向きに非酸化性ガスの
一例であるＮ2 ガスを送り、浴面２１に鋼板２０からス
ナウト壁面方向に向く流れを作り、浴表面に浮上する異
物（スカム）が浴中に搬送される鋼板２０に付着しない
ようにしている。The angle formed between the small diameter tubes 18 and 19 forming the downward nozzles 12 and 13 and the steel plate 20 is about 30.
As a result, N 2 gas, which is an example of non-oxidizing gas, is sent downward to the steel plate 20 to create a flow from the steel plate 20 toward the snout wall surface on the bath surface 21, and the foreign matter (scum) that floats on the bath surface. ) Does not adhere to the steel plate 20 conveyed in the bath.
【０００９】下向きノズル１２、１３の上方には、上向
きノズル１４、１５が配置されているが、この上向きノ
ズル１４、１５は、それぞれ図１（Ｂ）及び図２（Ａ）
に示すように、主管２２、２３と所定ピッチで取付けら
れた多数の突出ノズルの一例である小径管２４、２５と
からなっている。そして、図１（Ｂ）に示すように、鋼
板２０と上向きノズル１４、１５の中心線との成す角度
α、βは約１２０〜１６０度程度となって、鋼板２０の
表裏に上向きの非酸化性ガスの流れを発生させるように
なっている。なお、小径管２４、２５の先端と鋼板２０
との距離ｈは約７０ｍｍ程度となって、鋼板２０が搬送
過程で多少振動しても小径管２４、２５（小径管１８、
１９においても同様）の先端と接触しないようになって
いる。Upward nozzles 14 and 15 are disposed above the downward nozzles 12 and 13, and these upward nozzles 14 and 15 are shown in FIGS. 1B and 2A, respectively.
As shown in FIG. 5, the main pipes 22 and 23 and small diameter pipes 24 and 25, which are an example of a large number of projecting nozzles attached at a predetermined pitch, are formed. Then, as shown in FIG. 1B, the angles α and β formed between the steel plate 20 and the center lines of the upward nozzles 14 and 15 are about 120 to 160 degrees, and the front and back surfaces of the steel plate 20 are non-oxidized upward. It is designed to generate a flow of sexual gas. The tips of the small diameter pipes 24 and 25 and the steel plate 20
The distance h between the steel plate 20 and the small diameter pipes 24 and 25 (small diameter pipes 18,
Also in 19), it does not contact the tip.
【００１０】また、図２（Ｂ）、（Ｃ）には、前記上向
きノズル１４、１５の別の実施の形態を示すが、同図
（Ｂ）に示す他の実施の形態に係る上向きノズル２６に
おいては、大径管２７の所定角度部分に幅が０．５〜１
ｍｍ程度のスリット２８を設けて構成されている。ま
た、同図（Ｃ）に示す更に他の実施の形態に係る上向き
ノズル２９においては、大径管３０にその直径が例えば
２〜５ｍｍ程度の突出ノズルの一例である小孔３１を所
定ピッチで多数設けて構成されている。何れの実施の形
態の場合でも、鋼板２０の表面でのガス圧が４ｍｍＡｑ
程度以上、風速が８ｍ／秒以上であれば、十分に付着し
た異物を除去できる。2 (B) and 2 (C) show another embodiment of the upward nozzles 14 and 15, the upward nozzle 26 according to another embodiment shown in FIG. 2 (B). , The width of the large-diameter pipe 27 is 0.5 to 1 at a predetermined angle portion.
The slit 28 of about mm is provided. Further, in an upward nozzle 29 according to still another embodiment shown in FIG. 7C, small holes 31 which are an example of projecting nozzles having a diameter of, for example, about 2 to 5 mm are formed in a large diameter tube 30 at a predetermined pitch. It is configured by providing a large number. In any of the embodiments, the gas pressure on the surface of the steel plate 20 is 4 mmAq.
If the wind velocity is about 8 m / sec or more, foreign matter that is sufficiently attached can be removed.
【００１１】前記実施の形態においては、下向きノズル
は、例えば特開平４−２７６０５２号公報に記載のよう
に、スナウトの一方に設けて、浮上するスカムをスナウ
トの他方側に押しやる構造のものであってもよい。ま
た、前記実施の形態においては、非酸化性ガスとしてＮ
2 ガスを用いたが、その他の非酸化性ガス（例えば、ア
ルゴンガス）等を使用することも可能である。In the above embodiment, the downward nozzle has a structure in which it is provided on one side of the snout and pushes the floating scum to the other side of the snout, as described in, for example, Japanese Patent Laid-Open No. 4-2606052. May be. Further, in the above-described embodiment, N is used as the non-oxidizing gas.
Two gases were used, but it is also possible to use other non-oxidizing gas (for example, argon gas).
【００１２】[0012]
【発明の効果】請求項１、２記載の溶融めっきにおける
スナウト内生成異物の鋼板付着防止装置は以上の説明か
らも明らかなように、ヒューム起因によるスナウト上部
からの落下異物の鋼板付着を防止でき、めっき表面欠陥
が大幅に減少されることになった。特に、請求項２記載
の溶融めっきにおけるスナウト内生成異物の鋼板付着防
止装置においては、非酸化性ガスの使用ガス量を少なく
して落下異物の除去が可能となった。As is apparent from the above description, the device for preventing foreign matter generated in the snout in the hot dip galvanizing process according to the first and second aspects of the present invention can prevent the foreign matter from falling from the upper part of the snout and causing the steel plate to adhere. , The plating surface defects are greatly reduced. Particularly, in the steel plate adhesion preventing device for foreign matter generated in snout in hot dip plating according to the second aspect, the amount of non-oxidizing gas used can be reduced and the falling foreign matter can be removed.
【図１】（Ａ）、（Ｂ）は本発明の一実施の形態に係る
溶融めっきにおけるスナウト内生成異物の鋼板付着防止
装置の説明図である。FIG. 1A and FIG. 1B are explanatory views of a steel plate adhesion preventing device for foreign matter generated in a snout in hot dip plating according to an embodiment of the present invention.
【図２】（Ａ）、（Ｂ）、（Ｃ）は同装置に使用するノ
ズルの説明図である。2A, 2B, and 2C are explanatory views of nozzles used in the apparatus.
【符号の説明】
１０ 溶融めっきにおけるスナウト内生成異物の鋼板付
着防止装置
１１ スナウト １２ 下向きノ
ズル
１３ 下向きノズル １４ 上向きノ
ズル
１５ 上向きノズル １６ 主管
１７ 主管 １８ 小径管
１９ 小径管 ２０ 鋼板（ス
トリップ）
２１ 浴面 ２２ 主管
２３ 主管 ２４ 小径管
（突出ノズル）
２５ 小径管（突出ノズル） ２６ 上向きノ
ズル
２７ 大径管 ２８ スリット
２９ 上向きノズル ３０ 大径管
３１ 小孔（突出ノズル）[Explanation of Codes] 10 Steel Plate Adhesion Prevention Device for Foreign Substances Generated in Snout during Hot Dip 11 Snout 12 Downward nozzle 13 Downward nozzle 14 Upward nozzle 15 Upward nozzle 16 Main pipe 17 Main pipe 18 Small diameter pipe 19 Small diameter pipe 20 Steel plate (strip) 21 Bath surface 22 Main pipe 23 Main pipe 24 Small diameter pipe (projecting nozzle) 25 Small diameter pipe (projecting nozzle) 26 Upward nozzle 27 Large diameter pipe 28 Slit 29 Upward nozzle 30 Large diameter pipe 31 Small hole (projecting nozzle)
フロントページの続き (56)参考文献 特開 平８−53741（ＪＰ，Ａ) 特開 平７−157854（ＪＰ，Ａ) 特開 平７−150323（ＪＰ，Ａ) 特開 平６−272006（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C23C 2/00 Continuation of front page (56) Reference JP-A-8-53741 (JP, A) JP-A-7-157854 (JP, A) JP-A-7-150323 (JP, A) JP-A-6-272006 (JP , A) (58) Fields surveyed (Int.Cl. 7 , DB name) C23C 2/00
Claims (2)
ト内を通過する鋼板に異物の付着を防止する装置であっ
て、 前記鋼板周囲の湯面の異物を除去する下向きノズルの他
に、前記鋼板の表裏側に上向きの非酸化性ガスの流れを
発生させる上向きノズルをそれぞれ設け、該鋼板に付着
する異物の除去を行うことを特徴とする溶融めっきにお
けるスナウト内生成異物の鋼板付着防止装置。1. A device for preventing foreign matter from adhering to a steel sheet passing through a snout installed in a bath of hot dip plating, the apparatus further comprising: a downward nozzle for removing foreign matter on a molten metal surface around the steel sheet. A steel sheet adhesion preventing device for foreign matter produced in a snout in hot dip plating, characterized in that upward nozzles that generate upward flow of non-oxidizing gas are provided on the front and back sides of the steel sheet to remove foreign matter adhering to the steel sheet.
主管の一方側に所定ピッチで取付けられた多数の突出ノ
ズルからなっている請求項１記載の溶融めっきにおける
スナウト内生成異物の鋼板付着防止装置。2. The steel plate for preventing foreign matter generated in a snout in hot dip plating from adhering to a steel plate, wherein each of the upward nozzles comprises a large number of projecting nozzles mounted on one side of a large diameter main pipe at a predetermined pitch. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33288896A JP3437731B2 (en) | 1996-11-27 | 1996-11-27 | Apparatus for preventing foreign matter generated in snout from adhering to steel sheet in hot dip plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33288896A JP3437731B2 (en) | 1996-11-27 | 1996-11-27 | Apparatus for preventing foreign matter generated in snout from adhering to steel sheet in hot dip plating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10158797A JPH10158797A (en) | 1998-06-16 |
| JP3437731B2 true JP3437731B2 (en) | 2003-08-18 |
Family
ID=18259930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33288896A Expired - Fee Related JP3437731B2 (en) | 1996-11-27 | 1996-11-27 | Apparatus for preventing foreign matter generated in snout from adhering to steel sheet in hot dip plating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3437731B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1225244A1 (en) * | 2001-01-17 | 2002-07-24 | Recherche Et Developpement Du Groupe Cockerill Sambre | Process for galvanisation of steel |
| DE102011118197B3 (en) | 2011-11-11 | 2013-05-08 | Thyssenkrupp Steel Europe Ag | A method and apparatus for hot dip coating a metal strip with a metallic coating |
| KR101461732B1 (en) * | 2012-12-21 | 2014-11-14 | 주식회사 포스코 | Gas flow regulating apparatus in snout |
| KR101639709B1 (en) * | 2014-12-24 | 2016-07-14 | 주식회사 포스코 | Galvanizing snout and system for injecting coating agent of galvaniaing snout |
| DE102015108334B3 (en) * | 2015-05-27 | 2016-11-24 | Thyssenkrupp Ag | Apparatus and method for improved metal vapor extraction in a continuous hot dip process |
-
1996
- 1996-11-27 JP JP33288896A patent/JP3437731B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10158797A (en) | 1998-06-16 |
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