JPS63238252A - Continuous hot dip coating apparatus - Google Patents
Continuous hot dip coating apparatusInfo
- Publication number
- JPS63238252A JPS63238252A JP7079487A JP7079487A JPS63238252A JP S63238252 A JPS63238252 A JP S63238252A JP 7079487 A JP7079487 A JP 7079487A JP 7079487 A JP7079487 A JP 7079487A JP S63238252 A JPS63238252 A JP S63238252A
- Authority
- JP
- Japan
- Prior art keywords
- pot
- zinc
- gas
- dross
- main pot
- 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
- 238000003618 dip coating Methods 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims description 31
- 230000001590 oxidative effect Effects 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 38
- 239000011701 zinc Substances 0.000 abstract description 35
- 229910052725 zinc Inorganic materials 0.000 abstract description 34
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 5
- 210000004894 snout Anatomy 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 27
- 238000005275 alloying Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、メインポット内の溶融金属、例えば溶融亜鉛
に鋼板を連続的に浸漬させてメッキをする連続式溶融メ
ッキ装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous hot-dip plating apparatus for plating a steel plate by continuously immersing it in molten metal, such as molten zinc, in a main pot.
溶融メッキは、メッキの種類により、亜鉛メッキ、アル
ミニウムメッキ、錫メッキ、鉛メッキに区分されている
。これらのメッキは、いずれもメッキ材をポット内で溶
解し、その浴中に鋼板を浸漬させてメッキをすることを
特長とし、使用する装置もほぼ似通っている。Hot-dip plating is classified into zinc plating, aluminum plating, tin plating, and lead plating, depending on the type of plating. All of these plating methods are characterized by dissolving the plating material in a pot and plating the steel plate by immersing it in the bath, and the equipment used is almost similar.
そこで最も需要の多い溶融亜鉛メッキについて説明する
と、まずメッキ前に無酸化炉や還元加熱炉を用いて鋼板
の表面が活性化され、続いて冷却炉でメッキに適した温
度に調整された後、大気に触れることなくポットに導か
れる。ポットにおいては、浴中のジンクロールを迂回し
て鋼板が引き上げられ、その間亜鉛メッキが施される。To explain hot-dip galvanizing, which is most in demand, first, the surface of the steel plate is activated using a non-oxidizing furnace or a reduction heating furnace, and then adjusted to a temperature suitable for plating in a cooling furnace. It is guided into the pot without touching the atmosphere. In the pot, the steel sheet is pulled up, bypassing the zinc roll in the bath, during which galvanization is applied.
鋼板には過剰の亜鉛が付着するが、その余分な亜鉛は浴
上のガスワイピングノズルで除去し、メッキ厚を調整し
ている。Excess zinc adheres to the steel plate, but the excess zinc is removed using a gas wiping nozzle above the bath to adjust the plating thickness.
メッキとともにポット内の溶融亜鉛が減り、浴面レベル
が低下するが、通常亜鉛インゴットを投入して目減り分
を補ぎなっている。このインゴットが溶解する間、浴温
か低下し、メッキ厚みや、合金層形成に影響を与えるこ
とがある。このような温度低下を避けるため、インゴッ
トをサブポット内で溶解し、メインポットに供給するよ
うにした装置もある。With plating, the amount of molten zinc in the pot decreases, causing the bath level to drop, but zinc ingots are usually thrown in to make up for the loss. While this ingot is melting, the bath temperature decreases, which may affect the plating thickness and alloy layer formation. In order to avoid such a temperature drop, some devices melt the ingot in a sub-pot and supply it to the main pot.
ところで、溶融亜鉛メッキにおいては、インゴット投入
時に酸化亜鉛を核とした多量のトップドロスが発生し、
浴中に浮遊する。また、浸漬中の鋼板からも鉄分が溶出
し、この鉄分が溶融亜鉛と化合し、粒状のボトムドロス
となり、ポットの底部に堆積する。これらのドロスが多
くなると、メッキ時にドロスを巻き込み、鋼板表面に付
着して品質低下を招くことがある。そこで定期的に除去
することが行なわれているが、積極的に除去するため、
サブポット内にドロスを誘致し、沈殿させるようにした
装置も見掛けられる。By the way, in hot-dip galvanizing, a large amount of top dross with zinc oxide as the core is generated when the ingot is charged.
Float in the bath. In addition, iron is eluted from the steel plate during immersion, and this iron combines with molten zinc to form granular bottom dross, which is deposited on the bottom of the pot. If the amount of dross increases, the dross may become entangled during plating and adhere to the surface of the steel plate, resulting in a deterioration in quality. Therefore, it is removed periodically, but in order to actively remove it,
There are also devices that attract dross into the sub-pot and allow it to settle.
〔発明が解決しようとする問題点〕−
前者の装置は浴温低下が避けられるものの、インゴット
溶解時に発生したドロスがメインポットに流れ込み、品
質低下を招くおそれがある。後者の装置においては、メ
インポット内のドロスを単にサブポット内に移したに過
ぎないから品質向上に貢献はしているものの、亜鉛原単
位の向上には至っていない。[Problems to be Solved by the Invention] - Although the former device avoids a drop in bath temperature, there is a risk that dross generated during ingot melting may flow into the main pot, leading to quality deterioration. In the latter device, the dross in the main pot is simply transferred to the sub-pot, so although it contributes to quality improvement, it does not lead to an improvement in the zinc consumption rate.
そこで・本発明の目的は、根本的な問題であるドロスの
発生を抑制し、亜鉛原単位の向上を図った連続式溶融メ
ッキ装置を提供することにある。Therefore, an object of the present invention is to provide a continuous hot-dip plating apparatus that suppresses the generation of dross, which is a fundamental problem, and improves the zinc consumption rate.
上記目的を達成するため、本発明は、鋼板を連続的に溶
融メッキするメインポットの側近に、メッキ用インゴッ
トを溶解させるサブポットを設け、そのサブポットとメ
インポットを溶湯導入路で連結するとともにサブポット
に着脱可能なカバーと浴撹拌機構例えば底部に不活性ガ
スである非酸化ガス又は水素ガス等の還元性ガスを吹き
込むガス導入路を設けたことを特徴とする。In order to achieve the above object, the present invention provides a sub-pot for melting a plating ingot near a main pot for continuously hot-dipping steel plates, connects the sub-pot and the main pot with a molten metal introduction path, and connects the sub-pot to the main pot by a molten metal introduction path. It is characterized by having a removable cover and a bath stirring mechanism, for example, a gas introduction path for blowing inert non-oxidizing gas or reducing gas such as hydrogen gas at the bottom.
メインポットの溶融亜鉛が消費されると、サブポットよ
り溶湯導入路を介して溶湯亜鉛が供給される。ある程度
浴面レベルが低下したら、カバーを外し、亜鉛インゴッ
トをサブポットに投入する。When the molten zinc in the main pot is consumed, molten zinc is supplied from the sub-pot via the molten metal introduction path. When the bath level drops to a certain extent, remove the cover and put the zinc ingot into the subpot.
このインゴットが溶解するとき、空気中の酸素と化合し
、酸化亜鉛を核とした多くのトップドロスが発生する。When this ingot melts, it combines with oxygen in the air and generates a lot of top dross with zinc oxide as its core.
このトップドロスの発生を抑止するため、まずカバーを
して空気との接触を断ち、次いで非酸化ガスをガス導入
路を介して底部より吹き込む。非酸化ガスが上昇過程に
ある間、溶融亜鉛を攪拌し、一旦発生したトップドロス
を浮き上がらせ、また液中に浮遊する主としてＦｅ −
Ｚｎから成るボトムドロスをＰｅ−Ｚｎ−ＡＪに合金化
し、同じく液面上に浮上させる。In order to suppress the generation of this top dross, first cover the container to cut off contact with air, and then blow in non-oxidizing gas from the bottom through the gas introduction path. While the non-oxidizing gas is in the rising process, the molten zinc is stirred, the top dross that has been generated is lifted up, and the mainly Fe −
Bottom dross consisting of Zn is alloyed with Pe-Zn-AJ and also floated on the liquid surface.
溶湯導入路は液面レベルよりも低い位置にあるから、攪
拌によりドロスが浮き上がり、流出が食い止められる。Since the molten metal introduction path is located at a position lower than the liquid level, stirring causes the dross to float up and prevent it from flowing out.
その一方において非酸化ガスが液面を覆うことになるか
ら、トップドロスの発生が抑止され、その分亜鉛原単位
が向上する。また、非酸化ガスのかわりに還元性ガスを
使用すれば、トップドロスが純亜鉛に還元され、更に亜
鉛原単位を向上させることができる。On the other hand, since the non-oxidizing gas covers the liquid surface, the generation of top dross is suppressed, and the zinc consumption rate is improved accordingly. Further, if a reducing gas is used instead of a non-oxidizing gas, the top dross is reduced to pure zinc, and the zinc consumption rate can be further improved.
以下、図面を参照して実施例を説明する。 Examples will be described below with reference to the drawings.
図において、１は鋼板Ｓを溶融メッキするメインポット
であり、内部にはメッキに供せられる溶融亜鉛ＭＺｎが
満たされている。溶融亜鉛ＭＺｎの温度は鋼板Ｓが持ち
込む熱により平衡が保たれるため、外部より熱が加える
必要がほとんどないが、溶融亜鉛ＭＺｎの温度が目標温
度より下回るときは、メインポット１の側面に備えるイ
ンダクター２により加熱される。加熱制御においては浴
温針、例えば熱電対３を用いて溶融亜鉛ＭＺｎの温度を
計測し、目標温度との差を埋めるようにインダクター２
の加熱を制御する。In the figure, numeral 1 is a main pot for hot-dip plating a steel plate S, and the inside thereof is filled with molten zinc MZn for plating. The temperature of the molten zinc MZn is balanced by the heat brought in by the steel plate S, so there is almost no need to apply heat from the outside. However, if the temperature of the molten zinc MZn is lower than the target temperature, a It is heated by the inductor 2. In heating control, the temperature of molten zinc MZn is measured using a bath temperature needle, for example, a thermocouple 3, and an inductor 2 is used to compensate for the difference from the target temperature.
control the heating of
メインポットｌに導かれる鋼板Ｓは、前処理として、通
常連続炉４により加熱・冷却され、還元処理によって表
面が活性化される。その表面が空気に触れないように連
続炉４よりメインポット１に向けてスナウト５が配設さ
れる。そのスナウト５の終端は端部より空気が侵入しな
いように浴面下に配され、メッキにより浴面レベルが低
下しても端部より下回らないように浴面レベルが維持さ
れる。浴中には鋼板Ｓを浸漬させるシンクロール６がス
ナウト５の延長線状に配され、更にメッキされた鋼板Ｓ
を引き上げるスナップロール７が浴面近くに配される。The steel plate S led to the main pot 1 is usually heated and cooled in a continuous furnace 4 as a pretreatment, and its surface is activated by reduction treatment. A snout 5 is disposed toward the main pot 1 from the continuous furnace 4 so that its surface does not come into contact with air. The terminal end of the snout 5 is placed below the bath surface to prevent air from entering from the end, and even if the bath surface level decreases due to plating, the bath surface level is maintained so as not to fall below the end. A sink roll 6 for immersing the steel plate S in the bath is disposed in an extension of the snout 5, and the plated steel plate S
A snap roll 7 for pulling up the water is arranged near the bath surface.
鋼板Ｓは上記ジンクロール６を迂回することによりメッ
キされ、過剰に付着した亜鉛が図示しない浴上のガスワ
イピングノズルにより絞り取られ、メッキ厚が調整され
る。The steel plate S is plated by bypassing the zinc roll 6, and excess zinc is squeezed out by a gas wiping nozzle (not shown) on the bath to adjust the plating thickness.
メッキが進むにつれて、浴面レベルが低下するが、従来
においては亜鉛インゴットをメインポット１に投入し、
補充している。この方式だとインダクター２により加熱
したとしてもインゴットが目標温度に達するまで一時的
に浴温か低下し、品質に重大な影響を及ぼすことがある
０通常メッキ浴管理においては、１）浴濃度成分（Ａ
１ 、Ｐｂｅｔｃ）、２）浴温度（４６０℃前後）の２
点について行なわれており、これらの因子は鋼板鋼種、
製品表面調整（合金化処理、ノーマル、ゼロスパングル
）に応じ変更されている。例えばメッキ浴温度について
は、鋼板鋼種によっても異なるが、その製品表面調整に
応じて４６０℃を境にし、一般に、合金化処理を実施す
る場合には≦４６・０℃（４５０℃狙い）、合金化処理
を実施しない場合には〉４６０℃（４７０℃狙い）に保
たれる。これは製品に応じて鋼板に初期生成合金属形態
を形成する必要があるからである。すなわち、浴温か高
いと鋼素地と浴との反応性が高まり、メッキ層界面にＦ
ｅ−Ｚｎ−Ａｎ合金層が緻密に形成される。この合金層
はメッキの密着性が良好で合金化処理を施さないものに
適しているが、合金化処理を施す製造においては、Ｆｅ
拡散のバリヤ一層として働くため、合金化処理を妨げ、
不適である。逆に浴温か低いと、Ｆｅ−Ｚｎ−Ａｆ合金
層が脆弱となりバリヤー効果も薄れて合金化処理がやり
易くなる一方、非合金化処理には向いていない。As plating progresses, the bath level decreases, but in the past, the zinc ingot was put into the main pot 1,
Replenishing. In this method, even if the ingot is heated by inductor 2, the bath temperature will temporarily drop until the ingot reaches the target temperature, which may seriously affect the quality.In normal plating bath management, 1) bath concentration components ( A
1, Pbetc), 2) Bath temperature (around 460°C)
These factors are the steel type, steel type,
Changes are made depending on the product surface adjustment (alloying treatment, normal, zero spangle). For example, the plating bath temperature varies depending on the type of steel plate, but it is generally set at 460°C depending on the surface preparation of the product, and generally 46.0°C (aiming for 450°C) when alloying is performed. When no chemical treatment is carried out, the temperature is maintained at >460°C (aiming at 470°C). This is because it is necessary to form an initial alloy metal shape on the steel plate depending on the product. In other words, when the bath temperature is high, the reactivity between the steel substrate and the bath increases, and F is generated at the interface of the plating layer.
A dense e-Zn-An alloy layer is formed. This alloy layer has good plating adhesion and is suitable for products that are not subjected to alloying treatment, but in manufacturing with alloying treatment, Fe
Acts as a diffusion barrier, hindering alloying processes,
Not suitable. On the other hand, if the bath temperature is low, the Fe-Zn-Af alloy layer becomes brittle and the barrier effect is weakened, making alloying treatment easier, but it is not suitable for non-alloying treatment.
しかも、現状１ラインにおいては多品種が製造されてい
るが、１）ポット容量が大きいため応答が遅い、２）ｉ
ｌｉｉｌ板が持ち込む熱により浴温か左右され、操業ス
ピードの変更でその変動が大きい、３）インゴット投入
で浴温が下がる等の理由で浴温を製品品種毎に適宜変更
することが難しく、その調整に多くの時間と労力を費や
している。Moreover, although a wide variety of products are currently manufactured on a single line, 1) the response is slow due to the large pot capacity, and 2) i
The bath temperature is affected by the heat brought in by the liil plate, and changes in operating speed can cause large fluctuations.3) The bath temperature drops when ingots are added, making it difficult to adjust the bath temperature appropriately for each product type. spending a lot of time and effort on.
本発明においては変動自由度を大きく、変動幅を小さく
するために、メインボット１の側近に亜鉛インゴットを
溶解させるサブポット８が併設され、溶湯導入路９によ
りサブボット８とメインボッ）１が連結される。溶湯導
入路９はなるべく底部に設けることが望ましい、上記サ
ブボット８が併設されることによりメインボット１の容
量を小さくでき、浴温コントロールの応答性が良好にな
る。またインゴット投入時における浴温低下も防ぐこと
ができる。更に適正な温度とするため、溶湯導入路９に
温度調整用ヒータ１０を組み込み、温度計１１を挿入し
て供給する溶湯亜鉛ＭＺｎの温度を管理してもよい。In the present invention, in order to increase the degree of freedom of variation and reduce the range of variation, a sub-pot 8 for melting the zinc ingot is installed adjacent to the main pot 1, and the sub-pot 8 and the main pot 1 are connected by a molten metal introduction path 9. . It is desirable that the molten metal introduction path 9 be provided at the bottom.By providing the sub-bot 8, the capacity of the main bot 1 can be reduced and the responsiveness of bath temperature control can be improved. It is also possible to prevent the bath temperature from decreasing when the ingot is introduced. Furthermore, in order to maintain an appropriate temperature, a temperature adjusting heater 10 may be incorporated into the molten metal introduction path 9, and a thermometer 11 may be inserted to control the temperature of the molten zinc MZn supplied.
本発明においては、更にトップドロスの発生を抑止する
ため、サブボットにカバー１２が付設され、底部に非酸
化ガスを吹き込むガス導入路１３が設けられる。浴面レ
ベルが低下したら、まずカバー１２を外して必要量の亜
鉛インゴットをサブボット８に投入し、再びカバー１２
を閉じる。次いでガス導入路１３より非酸化ガス（Ｎ２
．＾ｒ。In the present invention, in order to further suppress the occurrence of top dross, a cover 12 is attached to the subbot, and a gas introduction path 13 for blowing non-oxidizing gas is provided at the bottom. When the bath level drops, first remove the cover 12, put the required amount of zinc ingots into the subbot 8, and then close the cover 12 again.
Close. Next, non-oxidizing gas (N2
．． ^r.
Ｎ２等）をサブボット８の底部に吹き込む。この非酸化
ガスが上昇するときに、浴を攪拌し、浴中に浮遊するド
ロス（主にＦｅ −Ｚｎ合金から成る）をＦｅ−Ｚｎ−
″″Ａｊ２合金化し、液面上に浮かせると同時にインゴ
ット溶解時に多量に発生したトップドロスをも浮上させ
る。サブボット８の液面は溶湯導入路９よりも高い位置
にあるから、ドロスの流れ込みが阻止される。またサブ
ボット８の液面が非酸化ガスで覆われることになるから
、溶融亜鉛と空気との接触が断たれ、トンブトロスの発
生が抑止される。非酸化ガスのかわりに還元ガス（Ｈ，
ガス）を使用すれば一旦発生したトップドロスが純亜鉛
に戻り、亜鉛単位の向上が図れる。この還元ガスに替え
て還元剤（塩化マグネシウム）をサブボット８に投入し
てもよい、また、サブポット内で＾１．Ｐｂ等の濃度を
調整してメインボット１に供給してもよい。メインボッ
ト１で調整するよりも成分が均一化され、メインポット
成分の濃度を均一にかつスムーズに変更できる。Blow N2, etc.) into the bottom of the subbot 8. As this non-oxidizing gas rises, the bath is stirred and the dross (mainly composed of Fe-Zn alloy) floating in the bath is transformed into Fe-Zn-
``'' Aj2 alloy is made to float on the liquid surface, and at the same time, a large amount of top dross generated during ingot melting is also floated. Since the liquid level of the subbot 8 is higher than the molten metal introduction path 9, dross is prevented from flowing into the subbot 8. Further, since the liquid surface of the subbot 8 is covered with non-oxidizing gas, the contact between the molten zinc and the air is cut off, and the generation of tombutros is suppressed. Reducing gas (H,
By using gas), the top dross once generated returns to pure zinc, and the zinc unit can be improved. Instead of this reducing gas, a reducing agent (magnesium chloride) may be introduced into the sub-pot 8. Also, in the sub-pot ^1. The concentration of Pb etc. may be adjusted and supplied to the main bot 1. The components are more uniform than when adjusting with the main pot 1, and the concentration of the main pot components can be changed uniformly and smoothly.
図にもみられるように、カバー１２に非酸化ガスのガス
路１４を設け、サブポット８の液面を非酸化ガスで覆う
ようにしてもよく、底部のガス導入路１３とカバー１２
のガス路１４とを連結し、底部より吹き込んだ非酸化ガ
スを循環させるようにしてもよい。また溶攪拌機として
ガス導入路の例を以上に述べたがこれに限らずサブポッ
ト１２内にプロペラを設けて撹拌してもよい。As shown in the figure, a gas passage 14 for non-oxidizing gas may be provided in the cover 12 to cover the liquid level of the sub-pot 8 with the non-oxidizing gas.
Alternatively, the non-oxidizing gas blown from the bottom may be circulated by connecting the gas passage 14 to the gas passage 14. Further, although the example of the gas introduction path as the melting stirrer has been described above, the present invention is not limited to this, and a propeller may be provided in the sub-pot 12 for stirring.
本発明によれば、従来ポット容量が２００７ｏｎであっ
たが、サブポットを設けることにより亜鉛インゴット投
入スペースが不要となり、１２０ Ｔｏｎ容量まで縮小
でき、その結果浴温、浴濃度変更に対する応答性が飛躍
的に高まった。また亜鉛原単位の向上についてみると、
従来亜鉛歩留が９６％であったものが９８％に向上し、
月間使用量７００Ｔｏｎに対し、年間１１．７６０ｋｇ
の原単位向上がみられた。According to the present invention, the conventional pot capacity was 2007 tons, but by providing a sub-pot, no space is required for inserting the zinc ingot, and the capacity can be reduced to 120 tons.As a result, the responsiveness to changes in bath temperature and bath concentration is dramatically improved. It increased to Also, looking at the improvement in zinc consumption,
The zinc yield has improved from 96% to 98%,
Monthly consumption: 700 tons, annual consumption: 11.760 kg
There was an improvement in the basic unit.
第１図は本発明の一実施例を示した概略図である。
１・・・メインポット、６・・・ジンクロール、８・・
・サブポット、９・・・溶湯導入路、１２・・・カバー
・１３・・・ガス導入路、Ｓ・・・鋼板、ＭＺｎ・・・
溶融亜鉛。FIG. 1 is a schematic diagram showing an embodiment of the present invention. 1...Main pot, 6...Zin roll, 8...
・Sub pot, 9... Molten metal introduction path, 12... Cover ・13... Gas introduction path, S... Steel plate, MZn...
Molten zinc.
Claims (2)
近に、メッキ用インゴットを溶解させるサブポットを設
け、そのサブポットとメインポットを溶湯導入路で連結
するとともにサブポットに着脱可能なカバーと浴撹拌機
構を設けたことを特徴とする連続式溶融メッキ装置。(1) A sub-pot for melting plating ingots is provided near the main pot for continuous hot-dip plating of steel sheets, and the sub-pot and main pot are connected through a molten metal introduction path, and a cover that is removable from the sub-pot and a bath stirring mechanism are provided. A continuous hot-dip plating device characterized by being equipped with.
は、底部に設けられた非酸化ガス又は還元性ガスを吹き
こむガス導入路であることを特徴とする連続式溶融メッ
キ装置。(2) The continuous hot-dip plating apparatus according to claim 1, wherein the bath stirring mechanism is a gas introduction path provided at the bottom and into which non-oxidizing gas or reducing gas is blown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7079487A JPS63238252A (en) | 1987-03-25 | 1987-03-25 | Continuous hot dip coating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7079487A JPS63238252A (en) | 1987-03-25 | 1987-03-25 | Continuous hot dip coating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63238252A true JPS63238252A (en) | 1988-10-04 |
Family
ID=13441801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7079487A Pending JPS63238252A (en) | 1987-03-25 | 1987-03-25 | Continuous hot dip coating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63238252A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2654749A1 (en) * | 1989-11-21 | 1991-05-24 | Lorraine Laminage | METHOD AND DEVICE FOR PURIFYING A HOT-TIME LIQUID METAL BATH OF A STEEL BAND |
| EP1091011A2 (en) * | 1999-10-04 | 2001-04-11 | Kawasaki Jukogyo Kabushiki Kaisha | Hot dipping apparatus |
| DE10253464A1 (en) * | 2002-11-16 | 2004-05-27 | INDUGA Industrieöfen und Giesserei-Anlagen GmbH & Co. KG | Device for hot dip coating strip-like or wire-like material comprises a coating container connected to a pressure-impinged melting vessel |
| JP2011510169A (en) * | 2008-01-14 | 2011-03-31 | 深▲セン▼市▲クンチーシン華▼科技有限公司 | Molten metal antioxidant / reduction agent and its preparation and application |
| KR101425130B1 (en) * | 2013-11-05 | 2014-08-13 | 주식회사 리배산업 | Plating equipment molten zinc to improve production quality |
-
1987
- 1987-03-25 JP JP7079487A patent/JPS63238252A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2654749A1 (en) * | 1989-11-21 | 1991-05-24 | Lorraine Laminage | METHOD AND DEVICE FOR PURIFYING A HOT-TIME LIQUID METAL BATH OF A STEEL BAND |
| EP1091011A2 (en) * | 1999-10-04 | 2001-04-11 | Kawasaki Jukogyo Kabushiki Kaisha | Hot dipping apparatus |
| EP1091011A3 (en) * | 1999-10-04 | 2002-07-10 | Kawasaki Jukogyo Kabushiki Kaisha | Hot dipping apparatus |
| DE10253464A1 (en) * | 2002-11-16 | 2004-05-27 | INDUGA Industrieöfen und Giesserei-Anlagen GmbH & Co. KG | Device for hot dip coating strip-like or wire-like material comprises a coating container connected to a pressure-impinged melting vessel |
| JP2011510169A (en) * | 2008-01-14 | 2011-03-31 | 深▲セン▼市▲クンチーシン華▼科技有限公司 | Molten metal antioxidant / reduction agent and its preparation and application |
| KR101425130B1 (en) * | 2013-11-05 | 2014-08-13 | 주식회사 리배산업 | Plating equipment molten zinc to improve production quality |
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