JPH03197657A - Method for removing suspended dross of galvanizing bath - Google Patents
Method for removing suspended dross of galvanizing bathInfo
- Publication number
- JPH03197657A JPH03197657A JP33511589A JP33511589A JPH03197657A JP H03197657 A JPH03197657 A JP H03197657A JP 33511589 A JP33511589 A JP 33511589A JP 33511589 A JP33511589 A JP 33511589A JP H03197657 A JPH03197657 A JP H03197657A
- Authority
- JP
- Japan
- Prior art keywords
- dross
- bath
- zinc
- galvanizing
- rear surface
- 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
Links
- 238000005246 galvanizing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000011701 zinc Substances 0.000 claims abstract description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 2
- 238000007747 plating Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、溶融亜鉛メッキ浴の浮遊ドロス除去方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for removing floating dross from a hot-dip galvanizing bath.
（従来技術と発明が解決しようとする課題）溶融亜鉛メ
ッキ浴表面に浮遊するドロスは、主として空気との接触
により生成するため定期的に除去しなければならず、そ
の除去は、一般に開孔部を有する大型スプーン状の治具
で、すくい出すことが行われている。又機械的に排除す
ることも知られている。(Prior art and problem to be solved by the invention) Dross floating on the surface of a hot-dip galvanizing bath is mainly generated by contact with air and must be removed periodically. Scooping out is done using a large spoon-shaped jig with a Mechanical exclusion is also known.
しかして何れにしても排除するドロス中には亜鉛が約８
５％、アルミニウム約２％含まれている。However, in any case, the dross to be rejected contains about 8
5% and about 2% aluminum.
即ち、浴表面・に生成し浮遊するドロスは酸化亜鉛と鉄
、亜鉛、アルミニウムからなる浮遊ドロスと比重差で浴
表面へ移動したアルミニウム、その他夾雑物等からなっ
ている。That is, the dross generated and floating on the bath surface consists of floating dross consisting of zinc oxide, iron, zinc, and aluminum, aluminum that has moved to the bath surface due to the difference in specific gravity, and other impurities.
これらの融点は、亜鉛メッキ操業浴温より高く、又大気
への放熱により、ドロス下面に接する浴の１部（亜鉛）
は半溶融状態になっており、ドロスに付随している。Their melting points are higher than the bath temperature during galvanizing operations, and due to heat radiation to the atmosphere, the part of the bath (zinc) in contact with the bottom surface of the dross melts.
is in a semi-molten state and is accompanied by dross.
従って、前記のごとくドロスを排出するとき、半溶融状
態の亜鉛（浴）も−緒に付随して排出することになり、
亜鉛地金原単位を著しく低下し、コストを上昇させる等
の欠点をともなうものである。Therefore, when the dross is discharged as described above, the semi-molten zinc (bath) is also discharged along with it.
This method has the disadvantages of significantly lowering the zinc base metal consumption rate and increasing costs.
（課題を解決するための手段）
本発明の特徴とするところは、溶融亜鉛メッキ浴の浮遊
ドロスを浴表面任意個所に集合せしめ、該ドロス下面に
浴を流動接触し、ドロス下面に付随している半溶融亜鉛
を溶解してドロスから離脱後、浮遊ドロスを浴外へ排出
することを特徴とする、溶融亜鉛メッキ浴の浮遊ドロス
除去方法に関するものである。(Means for Solving the Problems) The present invention is characterized in that floating dross of a hot-dip galvanizing bath is collected at any location on the bath surface, the bath is brought into fluid contact with the lower surface of the dross, and the dross attached to the lower surface of the dross is brought into fluid contact with the lower surface of the dross. The present invention relates to a method for removing floating dross from a hot-dip galvanizing bath, which comprises dissolving semi-molten zinc to separate it from the dross, and then discharging the floating dross out of the bath.
（作用）
即ち、本発明においては、例えば、浴表面に浮遊するド
ロスを亜鉛メッキ浴槽角隅へ治具により集め、次いでド
ロス下面に浴を流動接触させ、半溶融状で付随している
亜鉛を溶解し、ドロスから離脱する、つまり、ドロスの
排出に際し、浴表面上へドロスが移動したときの亜鉛が
ドロマイトから落下して浴へ戻すものである。(Function) That is, in the present invention, for example, the dross floating on the bath surface is collected at the corner of the galvanized bathtub using a jig, and then the bath is brought into fluid contact with the lower surface of the dross to remove the semi-molten zinc attached thereto. The zinc that dissolves and separates from the dross, that is, when the dross moves onto the bath surface during dross discharge, falls from the dolomite and returns to the bath.
しかして、浴表面の集合ドロス下面に浴を流動衝突する
方法としては、例えば、ドロス下面にプロペラ６を没入
位置して回転し、浴をドロス下面へ流動し、溶融状態の
浴を半溶融状態の亜鉛（浴）に接触させて溶解する。又
ノズルをドロス下面に位置せしめ、ポンプにより、浴を
噴呂し、ドロス下面に接触して溶解する等の方法を採る
ことができる。Therefore, as a method of causing the bath to flow and collide with the lower surface of the collected dross on the bath surface, for example, the propeller 6 is immersed in the lower surface of the dross and rotated to flow the bath toward the lower surface of the dross, turning the molten bath into a semi-molten state. of zinc (bath) and dissolve it. Alternatively, a method can be adopted in which a nozzle is positioned under the dross, and a pump is used to spray a bath into the dross so that it comes into contact with the dross and melts.
（実施例） 本発明の実施例を比較例とともに挙げる。(Example) Examples of the present invention will be listed together with comparative examples.
実施例
第１図及び第２図において、メッキ前処理炉（図示せず
）で鋼帯１の熱処理を施し、溶融亜鉛メッキ槽２の浴３
中へ導き、メッキ後、ノズル４からガスを吹付は所定付
着量に制御する連続溶融亜鉛メッキ方法において、亜鉛
メッキ浴３ＣＡＱ０．１２％、残Ｚｎ及び不純物、温度
４６０℃）表面に浮遊するドロス５をメッキ槽２の隅に
図示のごとくプロペラ６を浴面下３００−に位置せしめ
、その回転により隅に移動させるとともに浴３（流動速
度０．５ｍ／秒）を流動せしめ、 ドロス５下面に衝突
させ、このようにドロス５下面への浴３の流動衝突を６
０分間実施後、ドロス５を開孔部を有するスプーン状治
具ですくい出し凝固後のドロス中亜鉛はドロス１００ｋ
ｇ中１５隨の亜鉛量と僅かであった。Embodiment In FIGS. 1 and 2, a steel strip 1 is heat-treated in a plating pre-treatment furnace (not shown), and a bath 3 of a hot-dip galvanizing tank 2 is heated.
In the continuous hot-dip galvanizing method, in which the gas is sprayed from the nozzle 4 after plating to a predetermined coating amount, the dross 5 floating on the surface of the galvanizing bath 3 (CAQ 0.12%, remaining Zn and impurities, temperature 460°C) A propeller 6 is positioned below the bath surface 300- as shown in the corner of the plating tank 2, and its rotation moves the propeller 6 to the corner and causes the bath 3 (flow speed 0.5 m/sec) to flow, colliding with the lower surface of the dross 5. In this way, the flow collision of the bath 3 against the lower surface of the dross 5 is
After 0 minutes, the dross 5 is scooped out using a spoon-shaped jig with a hole, and the zinc in the dross after solidification is 100k dross.
The amount of zinc was only 15 g/g.
比較例
実施例と同条件でメッキ槽２隅に掻き寄せたドロス５の
下面に浴３を流動衝突させることなく、ドロス５を除去
し、凝固後のドロス中の亜鉛は、ドロス１００ｋｇ中８
０ｋｇにも達し、付随した亜鉛が極めて多量であった。Comparative Example Under the same conditions as in Example, the dross 5 was removed without causing the bath 3 to flow and collide with the bottom surface of the dross 5 scraped at the two corners of the plating tank, and the zinc content in the dross after solidification was 8.
The amount of zinc involved was extremely large, reaching 0 kg.
（発明の効果）
本発明によれば、排出ドロス中の亜鉛を著しく減少せし
めることができ、亜鉛メッキコストを著しく低下させる
ことができる。(Effects of the Invention) According to the present invention, the amount of zinc in discharged dross can be significantly reduced, and the cost of galvanizing can be significantly reduced.
又省資源をはかることができ、がっ、工業的に安定して
実施することができる等の優れた効果が得られる。In addition, excellent effects such as resource saving and industrial stability can be obtained.
第１図は、本発明の実施例を示す説明図、第２図は、第
１図Ａ部の拡大説明図である。
１・・・銅帯
２・・・溶融亜鉛メッキ槽
３・・・浴
４・・・ノズル
５・・・ドロス
第
図FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an enlarged explanatory diagram of section A in FIG. 1... Copper strip 2... Hot-dip galvanizing tank 3... Bath 4... Nozzle 5... Dross diagram
Claims (1)
合せしめ、該ドロス下面に浴を流動接触し、ドロス下面
に付随している半溶融亜鉛を溶解して、ドロスから離脱
後、浮遊ドロスを浴外へ排出することを特徴とする、溶
融亜鉛メッキ浴の浮遊ドロス除去方法。The floating dross of the hot-dip galvanizing bath is collected at any location on the bath surface, the bath is brought into fluid contact with the lower surface of the dross, the semi-molten zinc attached to the lower surface of the dross is dissolved, and after being separated from the dross, the floating dross is removed from the bath. A method for removing floating dross from a hot-dip galvanizing bath, characterized by discharging it to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33511589A JPH03197657A (en) | 1989-12-26 | 1989-12-26 | Method for removing suspended dross of galvanizing bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33511589A JPH03197657A (en) | 1989-12-26 | 1989-12-26 | Method for removing suspended dross of galvanizing bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03197657A true JPH03197657A (en) | 1991-08-29 |
Family
ID=18284939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33511589A Pending JPH03197657A (en) | 1989-12-26 | 1989-12-26 | Method for removing suspended dross of galvanizing bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03197657A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239056A (en) * | 2006-03-10 | 2007-09-20 | Sakuratech Co Ltd | Hot-dip coating device, and hot-dip coating method |
-
1989
- 1989-12-26 JP JP33511589A patent/JPH03197657A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239056A (en) * | 2006-03-10 | 2007-09-20 | Sakuratech Co Ltd | Hot-dip coating device, and hot-dip coating method |
| JP4585474B2 (en) * | 2006-03-10 | 2010-11-24 | サクラテック株式会社 | Hot dipping treatment apparatus and hot dipping treatment method |
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