JPH04143259A - Device for removing impurity in molten zinc bath - Google Patents
Device for removing impurity in molten zinc bathInfo
- Publication number
- JPH04143259A JPH04143259A JP26531890A JP26531890A JPH04143259A JP H04143259 A JPH04143259 A JP H04143259A JP 26531890 A JP26531890 A JP 26531890A JP 26531890 A JP26531890 A JP 26531890A JP H04143259 A JPH04143259 A JP H04143259A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- impurities
- bubbles
- lance
- zinc
- 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
- 239000012535 impurity Substances 0.000 title claims abstract description 33
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000011701 zinc Substances 0.000 title claims abstract description 17
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 17
- 238000005246 galvanizing Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 2
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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、溶融亜鉛メツキラインにおける亜鉛浴内の不
純物除去装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for removing impurities in a zinc bath in a hot-dip galvanizing line.
（従来の技術）
溶融亜鉛メツキ工程において、亜鉛ポットの浴内で不純
物であるドロスが鋼板に付着し、メツキ鋼板の外観を損
なうことが知られている。(Prior Art) In the hot-dip galvanizing process, it is known that dross, which is an impurity, adheres to the steel plate in the bath of the zinc pot, impairing the appearance of the galvanized steel plate.
従来、この不純物に対し例えば特開昭６３−１４００７
０号公報に開示されるように、溶融亜鉛をフィルターに
通し、不純物を濾過して除去することが提案されている
。Conventionally, for example, Japanese Patent Application Laid-Open No. 63-14007
As disclosed in Japanese Patent No. 0, it has been proposed to pass molten zinc through a filter to filter and remove impurities.
（発明が解決しようとする課題）
溶融亜鉛メツキ浴中に存在する不純物の形態は浴に添加
する元素の種類により異なる。浴に添加するＡ１元素が
多いと浴に浮遊する不純物が多いが、Ａ１元素が少ない
と浴底に堆積する不純物が多い。(Problem to be Solved by the Invention) The form of impurities present in a hot-dip galvanizing bath differs depending on the type of element added to the bath. If there is a large amount of A1 element added to the bath, there will be many impurities floating in the bath, but if there is a small amount of A1 element added, there will be many impurities deposited on the bath bottom.
Ａ１元素が多い亜鉛浴に対し、溶融亜鉛浴内の不純物を
除去する方法としては、回転するランスから気泡を吐出
させ、その気泡で浴中不純物を浴面に浮上させ除去する
ことが考えられる（特願平１−３２１１２６号）。しか
し、Ａ１元素が少ない亜鉛浴にこの技術を適用すると、
浴底に堆積している不純物をかき乱し、多くの浴中不純
物が鋼板に付着してしまうおそれがある。A possible method for removing impurities in a molten zinc bath for a zinc bath containing a large amount of A1 elements is to discharge air bubbles from a rotating lance, and use the bubbles to float the impurities in the bath to the bath surface and remove them ( (Patent Application No. 1-321126). However, when this technology is applied to a zinc bath with less A1 element,
This may disturb the impurities deposited on the bottom of the bath and cause many of the impurities in the bath to adhere to the steel plate.
（課題を解決するための手段）
本発明は上記問題に鑑みてなされたもので、その要旨は
、溶融亜鉛メツキラインの亜鉛ポット内の浴中にガス吹
き込み可能な羽根を有するランスを設けると共に、その
まわりに上下移動可能な円釘を設けたことを特徴とする
溶融亜鉛浴内の不純物除去装置である。(Means for Solving the Problems) The present invention has been made in view of the above problems, and its gist is to provide a lance having a vane capable of blowing gas into a bath in a zinc pot of a hot-dip galvanizing line, and This is an apparatus for removing impurities in a molten zinc bath, which is characterized by a circular peg that is movable up and down around it.
（作用）
ランスのまわりに円筒を設けることにより、円筒内を上
昇する気泡の流れに伴う亜鉛浴の対流を生じさせ、浴底
に堆積している不純物をかき乱すことなく、浴中を浮遊
している不純物と浴底に堆積している不純物を円筒を通
して浮上除去することができる。このとき、浴底に堆積
しているドロスの檜積高さは変化するので、上下移動可
能な円筒を使用して浴中不純物除去の効率を上げること
ができる。浮上した不純物は浴面にある粘度の高い酸化
亜鉛に付着し、除去される。(Function) By providing a cylinder around the lance, convection is created in the zinc bath due to the flow of bubbles rising inside the cylinder, and the impurities deposited on the bottom of the bath are suspended in the bath without being disturbed. Impurities deposited on the bath bottom and impurities deposited on the bottom of the bath can be floated and removed through the cylinder. At this time, since the height of the dross deposited on the bath bottom changes, the efficiency of removing impurities in the bath can be increased by using a vertically movable cylinder. The floating impurities adhere to the highly viscous zinc oxide on the bath surface and are removed.
（実施例）
以下、本発明の実施例について図面を参照しながら説明
する。(Example) Examples of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of the present invention.
羽根付回転ランス５で発生させた気泡８は浴中不純物６
を捕捉し、浴面へ浮上する。気泡８はトップドロス膜９
を押し破り、気泡８に捕捉されてぃた浴中不純物６はト
ップドロス膜９の上にトラップされる。Air bubbles 8 generated by the rotary lance 5 with vanes are impurities 6 in the bath.
It captures the water and floats to the bath surface. Air bubbles 8 are top dross film 9
The impurities 6 trapped in the bubbles 8 are trapped on the top dross film 9.
本発明では、羽根付回転ランス５のまわりに上内部４と
下田筒７を取りつけることにより、浴底に堆積している
欲中不純物６は気泡８の上昇に伴う対流により上内部４
、下田筒７内を上昇浮上し、かき乱されることなくトッ
プドロス膜９に回収される。In the present invention, by attaching the upper interior 4 and the lower tube 7 around the rotary lance 5 with vanes, the impurities 6 deposited on the bath bottom are removed from the upper interior 4 by convection as the air bubbles 8 rise.
, floats upward in the lower tube 7 and is collected in the top dross film 9 without being disturbed.
また、浴底に堆積している不純物６の高さが変わったと
き、下田￥Ｎ７の高さを変えることにより浴底に堆積し
ている不純物６を効率良く除去する。Furthermore, when the height of the impurities 6 deposited on the bath bottom changes, the impurities 6 deposited on the bath bottom can be efficiently removed by changing the height of the Shimoda\N7.
羽根５Ａの径が２００ｍｍの回転ランス５を毎分２００
回転させながら、毎分３０リツトルの窒素ガスを回転ラ
ンス５の底部から浴中に吹き込み、そのまわりに内径３
００ｍｍの上内部４と内径２９７ｍｍの下田筒７を取つ
けた場合、浴中不純物６が多いときは下田筒７が長いほ
うが浴中不純物６を効率良く除去できた。Rotating lance 5 with blade 5A diameter of 200 mm at 200 speeds per minute
While rotating, 30 liters of nitrogen gas per minute is blown into the bath from the bottom of the rotary lance 5, and around it
When an upper inner tube 4 of 00 mm and a lower tube 7 with an inner diameter of 297 mm were installed, when there were many impurities 6 in the bath, the longer the lower tube 7 was, the more efficiently the impurities 6 in the bath could be removed.
（発明の効果）
本発明により、溶融亜鉛メツキラインにおける亜鉛浴内
の不純物を、簡易な装置で浴全体に巻き上げることなく
除去することが可能となる。(Effects of the Invention) According to the present invention, impurities in a zinc bath in a hot-dip galvanizing line can be removed with a simple device without being rolled up in the entire bath.
第１図は本発明の実施例を示す断面図である。
１・・・亜鉛ポット、２・・・鋼帯、３・・・ポットロ
ール、４・・・上内部、５・・・羽根付回転ランス、５
Ａ・・・羽根、６・・・浴中不純物、７・・・下田筒、
８・・・気泡、９・・・トップドロス膜。FIG. 1 is a sectional view showing an embodiment of the present invention. 1... Zinc pot, 2... Steel strip, 3... Pot roll, 4... Upper inside, 5... Rotating lance with vane, 5
A...Blade, 6...Impurities in the bath, 7...Shimoda tube,
8... Air bubbles, 9... Top dross film.
Claims (1)
ス吹き込み可能な羽根を有するランスを設けると共に、
そのまわりに上下移動可能な円筒を設けたことを特徴と
する溶融亜鉛浴内の不純物除去装置。(1) In addition to providing a lance with a vane capable of blowing gas into the bath in the zinc pot of the hot-dip galvanizing line,
A device for removing impurities in a molten zinc bath, characterized by having a cylinder that can be moved up and down around the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26531890A JPH04143259A (en) | 1990-10-04 | 1990-10-04 | Device for removing impurity in molten zinc bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26531890A JPH04143259A (en) | 1990-10-04 | 1990-10-04 | Device for removing impurity in molten zinc bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04143259A true JPH04143259A (en) | 1992-05-18 |
Family
ID=17415529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26531890A Pending JPH04143259A (en) | 1990-10-04 | 1990-10-04 | Device for removing impurity in molten zinc bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04143259A (en) |
-
1990
- 1990-10-04 JP JP26531890A patent/JPH04143259A/en active Pending
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