JPH04120258A - Method and device for continuous hot dip galvanizing - Google Patents
Method and device for continuous hot dip galvanizingInfo
- Publication number
- JPH04120258A JPH04120258A JP24003890A JP24003890A JPH04120258A JP H04120258 A JPH04120258 A JP H04120258A JP 24003890 A JP24003890 A JP 24003890A JP 24003890 A JP24003890 A JP 24003890A JP H04120258 A JPH04120258 A JP H04120258A
- Authority
- JP
- Japan
- Prior art keywords
- snout
- bath
- weir
- strip
- molten 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
- 238000005246 galvanizing Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 19
- 210000004894 snout Anatomy 0.000 claims abstract description 59
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 41
- 239000011701 zinc Substances 0.000 claims abstract description 41
- 238000007654 immersion Methods 0.000 claims description 26
- 238000000137 annealing Methods 0.000 claims description 9
- 238000007747 plating Methods 0.000 abstract description 47
- 238000007598 dipping method Methods 0.000 abstract description 3
- 238000007667 floating Methods 0.000 abstract description 3
- 101100165177 Caenorhabditis elegans bath-15 gene Proteins 0.000 abstract description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000008397 galvanized steel Substances 0.000 abstract description 2
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100002917 Caenorhabditis elegans ash-2 gene Proteins 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
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 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〉
本発明は連続溶融亜鉛めっき装置の溶融亜鉛浴に設置さ
れるスナウト内に発生するドロス乃至はアッシュの影響
を排除した連続溶融亜鉛めっき方法および装置に関す、
るものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a continuous hot-dip galvanizing method that eliminates the influence of dross or ash generated in a snout installed in a hot-dip zinc bath of a continuous hot-dip galvanizing device, and Regarding equipment,
It is something that
〈従来の技術〉
従来、連続溶融亜鉛めっきラインにおいて広く利用され
ているめっき装置では、第４図に示すように還元焼鈍炉
（図示せず）より出てくるストリップ１が大気に触れな
いようにするため、還元焼鈍炉とめっき槽１５内のめっ
き浴１１との間に筒状のスナウト３が配置されている。<Prior art> Conventionally, in the plating equipment widely used in continuous hot-dip galvanizing lines, as shown in Fig. 4, the strip 1 coming out of the reduction annealing furnace (not shown) is prevented from coming into contact with the atmosphere. Therefore, a cylindrical snout 3 is disposed between the reduction annealing furnace and the plating bath 11 in the plating tank 15.
このスナウト３は内部を大気雰囲気から遮断するため、
一端が還元焼鈍炉に接続され、他端はめっき浴１１中に
浸漬されており、スナウト３内には常に還元性ガスが充
満されている。なおめっき浴１１に導入されたストリッ
プ１はジンクロール４を介して上方に向きを変えたのち
、サポートロール５で支持されながら引き上げられる。This snout 3 isolates the inside from the atmosphere,
One end is connected to a reduction annealing furnace, the other end is immersed in a plating bath 11, and the snout 3 is always filled with reducing gas. The strip 1 introduced into the plating bath 11 is turned upward via the zinc roll 4 and then pulled up while being supported by the support roll 5.
しかし、この還元性ガス中には微量の酸素または水分等
が含有されており、この酸素または水分がめつき浴表面
の溶融金属と反応しアッシュ２′を生成する。一方めっ
き浴中には、ＦｅとＭの合金からなるドロスが浮遊して
おり、このドロスが浮上してスナウト内にドロス２とし
て溜まる。以下アッシユおよびドロスを総称してドロス
という。However, this reducing gas contains a trace amount of oxygen or moisture, and this oxygen or moisture reacts with the molten metal on the surface of the plating bath to form ash 2'. On the other hand, dross made of an alloy of Fe and M is floating in the plating bath, and this dross floats to the surface and accumulates in the snout as dross 2. Hereinafter, ash and dross will be collectively referred to as dross.
このドロス２がスナウト３内に堆積すると、連続的に移
動しているストリップ１に付着またはすり傷を付け、ス
トリップ１のめっき表面の品質が著しく損なわれるため
、現在ではこのドロス２をスナウト３内のめっき浴面上
から定期的に除去している。If this dross 2 accumulates inside the snout 3, it will adhere or scratch the continuously moving strip 1, significantly impairing the quality of the plating surface of the strip 1. It is regularly removed from the surface of the plating bath.
ドロス２を除去する場合、めっき作業を中断してからま
ずスナウト３内を還元性雰囲気から大気雰囲気に置換し
た後、スナウト３を上方に上げてドロス２をかき出して
いる。When removing the dross 2, after stopping the plating work, the reducing atmosphere in the snout 3 is first replaced with an atmospheric atmosphere, and then the snout 3 is raised upward to scrape out the dross 2.
このようにスナウト３内のドロス２の除去作業のために
はめっき作業を長時間、かつ頻繁に中断しなければなら
ず、生産性が大幅に低下する問題がある。As described above, in order to remove the dross 2 in the snout 3, the plating operation must be interrupted frequently for a long time, which poses a problem of significantly reducing productivity.
また、ドロス除去作業はバッチ作業であるのに対し、ド
ロス２の発生は連続的であり、ドロス除去後のめっき作
業時間に比例してスナウト３内のドロス２の発生量が増
加する。一方、ストリップ１へのドロス２の付着または
すり傷の発生はドロス２の発生量にある程度比例するの
で、従って完全にその付着を防止することはできず、製
品品質が安定しない問題がある。Further, while the dross removal work is a batch work, the generation of dross 2 is continuous, and the amount of dross 2 generated in the snout 3 increases in proportion to the plating work time after dross removal. On the other hand, since the adhesion of dross 2 to the strip 1 or the occurrence of scratches is to some extent proportional to the amount of dross 2 generated, the adhesion cannot be completely prevented, resulting in the problem of unstable product quality.
なおスナウト３内のドロス２除去あるいはストリップ１
へのドロス２の付着防止方法として、不活性ガスを吹き
つけて排除する方法（特開昭５６−８４４５３号公報）
、電磁ポンプ等で吸引する方法（特開昭６０−２３０９
６９号公報、実開昭６２−１４１０５９号公報、実開昭
６２−１４８５６３号方法）、スクリュー等でかき集め
る方法（特開昭６１−１４９４６７号公報、特開昭６２
−１８８７６６号公報）、パケットで汲み出す方法（実
開昭６０−１２２３５９号公報）、めっき液流でドロス
を排除する方法（特開昭６１−１８６４６３号公報）や
清浄な溶融金属を吹きつける方法（実開昭６２−１４１
０５８号公報）、あるいは第５図に示すように、スナウ
ト内を溶融亜鉛噴射ノズル６により撹拌す″る方法等が
ある。しかしいずれの方法においても、ストリップ七ド
ロス２との接触は避けられず、ドロス付着によるめっき
表面欠陥の発生は皆無にはならなかった。In addition, remove dross 2 or strip 1 in snout 3
As a method of preventing dross 2 from adhering to the surface, a method of blowing an inert gas to remove it (Japanese Patent Application Laid-Open No. 56-84453)
, suction method using an electromagnetic pump, etc. (Japanese Patent Application Laid-Open No. 60-2309
No. 69, JP-A-62-141059, JP-A-62-148563 method), method of scraping with a screw etc. (JP-A-61-149467, JP-A-62-1986)
-188766 publication), a method of pumping out with a packet (Japanese Utility Model Application Publication No. 60-122359), a method of removing dross with a flow of plating solution (Japanese Patent Application Publication No. 61-186463), and a method of spraying clean molten metal. (Jitsukai 62-141
No. 058), or as shown in Figure 5, there is a method of stirring the inside of the snout with a molten zinc injection nozzle 6. However, in either method, contact with the strip dross 2 is unavoidable. However, the occurrence of defects on the plating surface due to dross adhesion was not entirely eliminated.
スナウト内のドロスの影響を排除するための溶融亜鉛め
っき装置として特開平２−１１７４７号公報が提案され
ている。すなわち同公報に提案されている装置は第２図
に示すようにストリップ１はスナウト３内を経て、めっ
き浴面を含む上下の位置にストリップ１を囲繞するよう
に設けられているガイド板８の中を通りジンクロール４
に導かれる。JP-A-2-11747 has proposed a hot-dip galvanizing apparatus for eliminating the influence of dross in the snout. In other words, in the device proposed in the same publication, as shown in FIG. 2, the strip 1 passes through the snout 3, and guide plates 8 are provided to surround the strip 1 at upper and lower positions including the plating bath surface. Jin crawl through the inside 4
guided by.
このときガイド板８とストリップｌの間隙には、ポンプ
７で汲み上げられた溶融亜鉛が、噴射ノズル６により吐
出され、ガイド板８の上部より溢流させることによって
ストリップ１がドロスで汚されるのを防止せんとするも
のである。At this time, the molten zinc pumped up by the pump 7 is discharged from the injection nozzle 6 into the gap between the guide plate 8 and the strip 1, and is caused to overflow from the upper part of the guide plate 8, thereby preventing the strip 1 from being contaminated with dross. It is intended to prevent this.
また同公報には他の実施態様として、第３図に示すよう
に溶融亜鉛の噴射ノズル６はめっき浴面より上部にあり
、スナウト３の下端部はガイド板８と気密に接続されて
おり、ガイド板８の下端部はめっき浴面下に没している
。従って、ポンプ７より汲み上げられた溶融亜鉛は噴射
ノズル６よりガイド板８とストリップｌの間隙に吐出さ
れ、ガイド板８の下端部よりめっき浴中へ溢流させるも
のである。The publication also describes another embodiment in which, as shown in FIG. 3, the molten zinc injection nozzle 6 is located above the plating bath surface, and the lower end of the snout 3 is airtightly connected to the guide plate 8. The lower end of the guide plate 8 is sunk below the surface of the plating bath. Therefore, the molten zinc pumped up by the pump 7 is discharged from the injection nozzle 6 into the gap between the guide plate 8 and the strip l, and is caused to overflow from the lower end of the guide plate 8 into the plating bath.
〈発明が解決しようとするＲＢ＞
しかるに前記特開平２−１１７４７号に提案されている
従来技術はストリップ１へのドロス付着防止には効果が
あるが、同公報に開示されている前述従来技術のうち前
者は噴射ノズル６から供給された溶融亜鉛をガイド板８
の上部から溢流する際に溶融亜鉛が飛び散ってスナウト
３の内壁面に付着成長するためストリップ１に接触して
スリ傷を発生させる。<RB to be solved by the invention> However, although the prior art proposed in JP-A-2-11747 is effective in preventing dross from adhering to the strip 1, In the former case, the molten zinc supplied from the injection nozzle 6 is passed through the guide plate 8.
When overflowing from the top of the snout 3, molten zinc scatters and grows on the inner wall surface of the snout 3, coming into contact with the strip 1 and causing scratches.
またスナウト３内に侵入して来るストリップ１にもスプ
ラッシュ状に付着し、板面のＭ富化層の不均一生成をも
たらし、めっき組成の不均一性を引き起こすという問題
点がある。この問題点を解決するためにはガイド板８の
上端から溢流する溶融亜鉛の溢流速度の制御が必要であ
るが、噴射ノズル６からの噴出もあるため制御が困難で
ある。Further, there is a problem that the strip 1 that enters the snout 3 also adheres in the form of a splash, resulting in non-uniform formation of an M-enriched layer on the plate surface and non-uniformity in the plating composition. In order to solve this problem, it is necessary to control the overflow speed of the molten zinc overflowing from the upper end of the guide plate 8, but this is difficult because there is also jetting from the jetting nozzle 6.
これに対して後者は噴射ノズル６から供給された溶融亜
鉛の一部が上部で洩れて、噴射ノズル６に付着成長して
ストリップ１にスリ傷を発生させるという問題点があっ
た。On the other hand, the latter has a problem in that a part of the molten zinc supplied from the injection nozzle 6 leaks from the upper part, adheres to the injection nozzle 6 and grows, and causes scratches on the strip 1.
本発明の目的はスナウト内のめっき浴面上のドロスの影
響を排除した溶融亜鉛めっき装置を提寓するものである
。An object of the present invention is to propose a hot-dip galvanizing apparatus that eliminates the influence of dross on the surface of the plating bath in the snout.
本発明の他の目的は、スナウト内のめっき浴面上のドロ
スをスナウト外に排除する作業が不要で、しかもドロス
の付着のない高品質の製品を安定して製造することがで
きる連続溶融亜鉛めっき方法および装置を提供するもの
である。Another object of the present invention is to eliminate the need for removing dross on the surface of the plating bath inside the snout to the outside of the snout, and to enable the stable production of high-quality products free of dross adhesion. A plating method and apparatus are provided.
〈課題を解決するための手段〉
前記目的を達成するための本発明の方法は、−端が還元
焼鈍炉に接続され、他端が溶融亜鉛めっき浴に浸漬され
るスナウトの浴中浸漬部分を鉤形断面になるように内側
に折り返して浸漬堰を形成し、当該浸漬堰の中央開口に
より溶融亜鉛めっき浴中に進入するストリップを包囲す
ると共に、前記スナウトの浴中浸漬部分の外周に排出口
を設け、当該排出口から前記スナウトの内側に形成され
た浸漬堰の鉤形断面内の溶融亜鉛を吸引してスナウト外
へ排出される溶融亜鉛の排出速度を調節することにより
、前記ストリップを包囲する浸漬堰の中央開口に導かれ
て上昇する溶融亜鉛と、前記溶融亜鉛浴中に進入するス
トリップとの相対速度を制御することを特徴とする連続
溶融亜鉛めっき方法である。<Means for Solving the Problems> The method of the present invention for achieving the above object includes a bath-immersed portion of a snout whose negative end is connected to a reduction annealing furnace and whose other end is immersed in a hot-dip galvanizing bath. The snout is folded inward to form a hook-shaped cross section to form an immersion weir, and the central opening of the immersion weir surrounds the strip entering the hot-dip galvanizing bath, and a discharge port is provided on the outer periphery of the portion of the snout immersed in the bath. and surrounding the strip by sucking the molten zinc in the hook-shaped cross section of the immersion weir formed inside the snout from the outlet and adjusting the discharge speed of the molten zinc discharged outside the snout. This continuous hot-dip galvanizing method is characterized by controlling the relative speed of the molten zinc that is introduced into the central opening of the immersion weir and rises and the strip that enters the molten zinc bath.
また、本発明の装置は、一端が還元焼鈍炉に接続され、
他端が溶融亜鉛めっき浴に浸漬されるスナウトの浴中浸
漬部分を内側に折り返して溶融亜鉛めっき浴中に進入す
るストリップを包囲する鉤形断面の浸漬堰を形成すると
共に、前記スナウトの浴中浸漬部分の外周に浸漬堰内の
溶融亜鉛を吸引してスナウト外へ排出する排出口を設け
てなることを特徴とする連続溶融亜鉛めっき装置である
。Further, the apparatus of the present invention has one end connected to a reduction annealing furnace,
The bath-immersed portion of the snout whose other end is immersed in the hot-dip galvanizing bath is folded inward to form a hook-shaped immersion weir that surrounds the strip entering the hot-dip galvanizing bath, and the snout is immersed in the bath. This continuous hot-dip galvanizing apparatus is characterized in that a discharge port is provided on the outer periphery of the immersed part to suck the molten zinc in the immersion weir and discharge it to the outside of the snout.
〈実施例〉
以下、本発明の構成および作用を好適な一実施例に基い
て説明する。<Example> Hereinafter, the structure and operation of the present invention will be explained based on a preferred example.
本発明においては第１図に示すように一端が還元焼鈍炉
（図示せず）に接続され、他端がめつき槽１５内の溶融
亜鉛のめっき液１１に浸漬されるスナウト３を経てめっ
き液１１に浸漬されるストリップ１のめっき液面進入点
近傍を包囲するスナウト３の浴中浸漬部分を内側に折り
返して溶融亜鉛めっき浴１１（以下めっき浴という）中
に進入するストリップｌを包囲する鉤形断面の浸漬堰９
を形成すると共に、スナウト３の浴中浸漬部分の外周に
排出口１０を設ける。In the present invention, as shown in FIG. 1, one end is connected to a reduction annealing furnace (not shown), and the other end is immersed in the plating solution 11 of hot-dip zinc in the plating tank 15. A hook-shaped snout 3 that surrounds the vicinity of the plating solution surface entry point of the strip 1 immersed in the bath is folded inward to surround the strip L that enters the hot-dip galvanizing bath 11 (hereinafter referred to as the plating bath). Cross section of immersion weir 9
At the same time, a discharge port 10 is provided on the outer periphery of the part of the snout 3 immersed in the bath.
そしてこの排出口１０を配管１２に接続すると共に、配
管工２の途中にモータ１４によって駆動されるポンプ１
３を配設してあり、配管１２の排出端はめっき槽１５内
のめっき液１１中に開口している。Then, this discharge port 10 is connected to a pipe 12, and a pump 1 driven by a motor 14 is installed in the middle of the plumber 2.
3, and the discharge end of the pipe 12 opens into the plating solution 11 in the plating tank 15.
ストリップ１を包囲する浸漬堰９の上端はめっき浴１１
の浴面レベルよりやや低い高さとして、モータ１４によ
りポンプ１３を回転してスナウト３の内側に形成された
浸漬堰９の鉤形断面内の溶融亜鉛を排出口１０および配
管１２を介してポンプ１３に吸引し、配管１２の排出端
よりめっき浴１１中に連続的に排出される。これによっ
てスナウト３内にアッシュおよびドロス等の異物があっ
てもストリップ１に接触することなく溶融亜鉛と共に速
やかにスナウト３外に排除される。The upper end of the immersion weir 9 surrounding the strip 1 is coated with a plating bath 11
The pump 13 is rotated by the motor 14 to pump the molten zinc in the hook-shaped cross section of the immersion weir 9 formed inside the snout 3 through the outlet 10 and piping 12. 13 and is continuously discharged into the plating bath 11 from the discharge end of the piping 12. As a result, even if there is foreign matter such as ash or dross in the snout 3, it is quickly removed from the snout 3 together with the molten zinc without coming into contact with the strip 1.
それと共に、このような浸漬堰９の鉤形断面内に存在す
る溶融亜鉛の排出口１０を介するスナウト３外への排出
作用によりストリップｌを包囲する浸漬堰９の中央開口
９ａよりめっき浴ｌｌ中の清浄な溶融亜鉛が矢印で示す
ように上昇流となってスナウト３内に導入される。引続
きスナウト３内導入された溶融亜鉛は浸漬堰９の上端を
オーバて鉤形断面の浸漬堰９内に導入された後、前述−
ようにして排出口１０からスナウト３外に排出さ；めっ
き浴１１とスナウト３との間を循環すること（なる、排
出口１０からの溶融亜鉛排出速度はたと叱ばポンプ１３
の回転数を調節することによって行ｊれ、還元焼鈍炉か
らスナウト３を経て浸漬堰９（中央開口９ａからめっき
浴１１中に下向きに進入〕るストリップ１と、浸漬堰９
の中央開口９ａに剥かれてストリップｌの進入方向と向
流する溶融］鉛の上昇流との相対速度が制御される。ま
た浸６堰９内への溶融亜鉛の導入量調節は中央開口９２
の開口面積あるいは浸漬堰９の高さ等を調節すイことに
よって行うことができる。At the same time, by discharging the molten zinc present in the hook-shaped cross section of the immersion weir 9 to the outside of the snout 3 through the outlet 10, the molten zinc is discharged from the central opening 9a of the immersion weir 9 surrounding the strip l into the plating bath ll. Clean molten zinc is introduced into the snout 3 in an upward flow as shown by the arrow. Subsequently, the molten zinc introduced into the snout 3 passes over the upper end of the immersion weir 9 and is introduced into the immersion weir 9 having a hook-shaped cross section.
In this way, the molten zinc is discharged from the outlet 10 to the outside of the snout 3; it circulates between the plating bath 11 and the snout 3 (the rate at which molten zinc is discharged from the outlet 10 is determined by the pump 13).
The strip 1 passes from the reduction annealing furnace through the snout 3 to the immersion weir 9 (entering downward into the plating bath 11 from the central opening 9a) and the immersion weir 9.
The relative velocity of the upward flow of molten lead flowing countercurrently to the direction of entry of the stripped strip 1 into the central opening 9a of the strip is controlled. In addition, the amount of molten zinc introduced into the dipping weir 9 can be adjusted through the central opening 92.
This can be done by adjusting the opening area of the immersion weir 9 or the height of the immersion weir 9.
このようにして相対速度を制御することによって、スナ
ウト３を経てめっき浴１１中に進入するストリップ１に
は常にめっき槽１５内の清浄な溶融亜鉛が浸漬堰９の中
央開口９ａを介して向流方向に供給されるので、ストリ
ップＩに付着する酸化物等の不純物を除去することがで
きる。また、浸漬堰９の中央開口９ａには溶融亜鉛の湧
き上がるようなゆるやかな上昇流が形成されるためスナ
ウト３内におけるストリップエのめっき浴進入点近傍に
スプラッシュが発生するのが防止され、めっき浴１１中
に進入するストリップ１のスプラッシュによるトラブル
が防止できる。By controlling the relative speed in this manner, the strip 1 entering the plating bath 11 via the snout 3 is always supplied with clean molten zinc in the plating bath 15 in a countercurrent flow through the central opening 9a of the immersion weir 9. Since it is supplied in the same direction, impurities such as oxides adhering to the strip I can be removed. In addition, since a gentle upward flow of molten zinc is formed in the central opening 9a of the immersion weir 9, splash is prevented from occurring in the vicinity of the plating bath entry point of the stripe in the snout 3, and the plating Trouble caused by splash of the strip 1 entering the bath 11 can be prevented.
さらに、スナウト３内にはアンシュやドロス等の異物が
滞留することなく溶融亜鉛と共に排除されるばかりでな
く、ストリップ１に形成される亜鉛めっき層の加工性に
強く影響するＡＩ濃度はスナウト３の内外を問わず常に
一定に保たれるためストリップｌに加工性の良好なめっ
き層が安定して形成されることになる。このような溶融
亜鉛の一連のスムースな流れは溶融亜鉛浴全体の温度を
均一化することにもなり、Ｆｅ−ｆｉＪ形合金合金出も
著しく低減されると共に、溶融亜鉛浴全体の流動性も向
上することができる。Furthermore, not only are foreign substances such as ansch and dross not retained in the snout 3 and removed together with the molten zinc, but the AI concentration, which strongly affects the workability of the galvanized layer formed on the strip 1, is reduced in the snout 3. Since it is always kept constant regardless of whether it is inside or outside, a plating layer with good workability is stably formed on the strip l. This series of smooth flows of molten zinc also equalizes the temperature of the entire molten zinc bath, significantly reducing Fe-fiJ type alloy release and improving the fluidity of the entire molten zinc bath. can do.
次に具体例について説明すると、Ｐ、Ｍｎ添加極低炭素
鋼帯、Ｔｉ−Ｎｂ系極低炭素鋼帯および一般冷延ｓｉｔ
を用いて、
板 暢 １５００鑓
ｉ 厚 ｏ、７５閣
ライン速度 １２０ｍ／ｍ
目 付 量 ９０ｇ／ボ（片面）めっ
き浴中Ｍ濃度 ０．１４５％
めっき浴の温度 ４６５℃
の条件で、連続溶融亜鉛めっきラインにより、本発明法
および第２図に示すタイプを用いた従来法をそれぞれ実
施した。なお本発明法では溶融亜鉛のスナウトからの排
出速度は１０〜２００ｊ！／ｍの範囲で変化させた。Next, specific examples will be explained.
Continuously molten zinc was applied using a plate with a thickness of 1500 mm, a thickness of 75 mm, a line speed of 120 m/m, a weight of 90 g/bo (one side), a concentration of M in the plating bath of 0.145%, and a temperature of the plating bath of 465°C. The method of the present invention and the conventional method using the type shown in FIG. 2 were carried out on the plating line. In addition, in the method of the present invention, the discharge rate of molten zinc from the snout is 10 to 200J! /m.
その結果を、従来法と比較して第１表に示す。The results are shown in Table 1 in comparison with the conventional method.
第１表
第１表に示すように本発明装置の採用により溶融亜鉛の
スプラッシュに起因するスリ傷、めっき組成不均一等に
よる品質不良率が大幅に低減され、めっき層別工性も良
好であり、またドロス等の表面異物の付着も少なく好成
績が得られた。Table 1 As shown in Table 1, by adopting the device of the present invention, the quality defect rate due to scratches caused by molten zinc splash, uneven plating composition, etc. is significantly reduced, and the workability of plating layer separation is also good. Also, good results were obtained with less adhesion of foreign substances such as dross to the surface.
〈発明の効果〉
上述したように本発明においては、ストリップがめつき
浴面上に浮遊するドロスやアッシュとの有する溶融亜鉛
めっき鋼板を安定して製造できる。<Effects of the Invention> As described above, according to the present invention, it is possible to stably produce a hot-dip galvanized steel sheet in which the strip has dross and ash floating on the surface of the plating bath.
第１図は本発明装置の断面図、第２図乃至第５図はそれ
ぞれ異なった方式による従来例の断面図である。
・・・ストリップ、
・・・アッシュ、
・・・ジンクロール、
・・・噴射ノズル、
・・・ガイド板、
・・・排出口、
・・・配管、
・・・モータ、
・・・ドロス、
・・・スナウト、
・・・サポートロール、
・・・ポンプ、
・・・浸漬堰、
・・・めっき浴、
・・・ポンプ、
・・・めっき槽。FIG. 1 is a sectional view of the apparatus of the present invention, and FIGS. 2 to 5 are sectional views of conventional examples using different methods. ...strip, ...ash, ...zin roll, ...injection nozzle, ...guide plate, ...discharge port, ...piping, ...motor, ...dross, ...Snout, ...Support roll, ...Pump, ...Immersion weir, ...Plating bath, ...Pump, ...Plating tank.
Claims (2)
き浴に浸漬されるスナウトの浴中浸漬部分を鉤形断面に
なるように内側に折り返して浸漬堰を形成し、当該浸漬
堰の中央開口により溶融亜鉛めっき浴中に進入するスト
リップを包囲すると共に、前記スナウトの浴中浸漬部分
の外周に排出口を設け、当該排出口から前記スナウトの
内側に形成された浸漬堰の鉤形断面内の溶融亜鉛を吸引
してスナウト外へ排出される溶融亜鉛の排出速度を調節
することにより、前記ストリップを包囲する浸漬堰の中
央開口に導かれて上昇する溶融亜鉛と、前記溶融亜鉛浴
中に進入するストリップとの相対速度を制御することを
特徴とする連続溶融亜鉛めっき方法。1. One end of the snout is connected to a reduction annealing furnace and the other end is immersed in a hot-dip galvanizing bath.The part of the snout that is immersed in the bath is folded inward to form a hook-shaped cross section to form an immersion weir, and the immersion weir has a central opening. surrounds the strip entering the hot-dip galvanizing bath, and a discharge port is provided on the outer periphery of the part of the snout immersed in the bath, and a discharge port is provided from the discharge port within the hook-shaped cross section of the immersion weir formed inside the snout. By adjusting the discharge speed of the molten zinc discharged out of the snout by sucking the molten zinc, the molten zinc is guided to the central opening of the immersion weir surrounding the strip and rises, and the molten zinc enters the molten zinc bath. A continuous hot-dip galvanizing method characterized by controlling the relative speed with the strip.
き浴に浸漬されるスナウトの浴中浸漬部分を内側に折り
返して溶融亜鉛めっき浴中に進入するストリップを包囲
する鉤形断面の浸漬堰を形成すると共に、前記スナウト
の浴中浸漬部分の外周に浸漬堰内の溶融亜鉛を吸引して
スナウト外へ排出する排出口を設けてなることを特徴と
する連続溶融亜鉛めっき装置。2. One end is connected to the reduction annealing furnace, and the other end is immersed in the hot-dip galvanizing bath.The bath-immersed part of the snout is folded inward to form a hook-shaped immersion weir that surrounds the strip entering the hot-dip galvanizing bath. A continuous hot-dip galvanizing apparatus characterized in that a discharge port is provided on the outer periphery of the portion of the snout immersed in the bath to suck the molten zinc in the immersion weir and discharge it to the outside of the snout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24003890A JPH04120258A (en) | 1990-09-12 | 1990-09-12 | Method and device for continuous hot dip galvanizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24003890A JPH04120258A (en) | 1990-09-12 | 1990-09-12 | Method and device for continuous hot dip galvanizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04120258A true JPH04120258A (en) | 1992-04-21 |
Family
ID=17053548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24003890A Pending JPH04120258A (en) | 1990-09-12 | 1990-09-12 | Method and device for continuous hot dip galvanizing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04120258A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651263U (en) * | 1992-12-25 | 1994-07-12 | 新日本製鐵株式会社 | Continuous hot dip plating equipment |
| KR20000043870A (en) * | 1998-12-29 | 2000-07-15 | 이구택 | Snout for preventing adherence of impurities |
| US6093452A (en) * | 1997-02-25 | 2000-07-25 | Nkk Corporation | Continuous hot-dip coating method and apparatus therefor |
| WO2002038824A1 (en) * | 2000-11-10 | 2002-05-16 | Sollac | Method and installation for dip coating of a metal strip |
| WO2002038825A1 (en) * | 2000-11-10 | 2002-05-16 | Sollac | Method and installation for hot process and continuous dip coating of a metal strip |
| WO2002038823A1 (en) * | 2000-11-10 | 2002-05-16 | Sollac | Installation for dip coating of a metal strip |
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| WO2020224792A1 (en) * | 2019-05-08 | 2020-11-12 | Sms Group Gmbh | Method and device for rinsing an overflow chamber at the bath-side end of a snout of a device for hot-dip coating |
| FR3105796A1 (en) | 2019-12-26 | 2021-07-02 | Fives Stein | DEVICE FOR THE EVACUATION OF MATTE FROM THE SURFACE OF A LIQUID METAL BATH INSIDE A BELL DESCENT OF A LINE OF CONTINUOUS COATING OF A METAL BAND |
| RU2779077C1 (en) * | 2019-05-08 | 2022-08-31 | Смс Груп Гмбх | Method and device for flushing the overflow chamber at the end of the trunk of the coating device located on the side of the bath by immersion in the melt |
-
1990
- 1990-09-12 JP JP24003890A patent/JPH04120258A/en active Pending
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0651263U (en) * | 1992-12-25 | 1994-07-12 | 新日本製鐵株式会社 | Continuous hot dip plating equipment |
| US6093452A (en) * | 1997-02-25 | 2000-07-25 | Nkk Corporation | Continuous hot-dip coating method and apparatus therefor |
| US6315829B1 (en) | 1997-02-25 | 2001-11-13 | Nkk Corporation | Apparatus for hot-dip coating a steel strip |
| KR20000043870A (en) * | 1998-12-29 | 2000-07-15 | 이구택 | Snout for preventing adherence of impurities |
| BG64800B1 (en) * | 2000-11-10 | 2006-04-28 | Sollac | Method for coating of a metal strip and installation for the materialization of the method |
| CZ298884B6 (en) * | 2000-11-10 | 2008-03-05 | Sollac | Apparatus for dip coating of metal strip |
| WO2002038823A1 (en) * | 2000-11-10 | 2002-05-16 | Sollac | Installation for dip coating of a metal strip |
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| FR2816640A1 (en) * | 2000-11-10 | 2002-05-17 | Lorraine Laminage | Continuous dip coating of metal strip in a bath of molten metal using a sleeve to form a liquid pressure seal and two compartments with metal at a reduced level to stop entrainment of defects from the bath |
| FR2816637A1 (en) * | 2000-11-10 | 2002-05-17 | Lorraine Laminage | Installation for the continuous dip coating of metal strip incorporating a sleeve to form overflow compartments for recover metal oxide particles and intermetallic compounds from the molten coating bath |
| US6923864B2 (en) | 2000-11-10 | 2005-08-02 | Sollac | Plant for the dip-coating of a metal strip |
| US6936307B2 (en) | 2000-11-10 | 2005-08-30 | Usinor | Method and installation for dip coating of a metal strip |
| US6939586B2 (en) | 2000-11-10 | 2005-09-06 | Usinor | Method and installation for hot process and continuous dip coating of a metal strip |
| AU2002223778B2 (en) * | 2000-11-10 | 2006-04-27 | Sollac | Method and installation for hot process and continuous dip coating of a metal strip |
| WO2002038824A1 (en) * | 2000-11-10 | 2002-05-16 | Sollac | Method and installation for dip coating of a metal strip |
| KR100725558B1 (en) * | 2000-11-10 | 2007-06-08 | 쏠락 | Method and installation for hot process and continuous dip coating of a metal strip |
| KR100725557B1 (en) * | 2000-11-10 | 2007-06-08 | 쏠락 | Method and installation for dip coating of a metal strip |
| WO2002038825A1 (en) * | 2000-11-10 | 2002-05-16 | Sollac | Method and installation for hot process and continuous dip coating of a metal strip |
| CZ299077B6 (en) * | 2000-11-10 | 2008-04-16 | Sollac | Process and apparatus for continuous hot dip coating a metal strip |
| HRP20030363B1 (en) * | 2000-11-10 | 2011-05-31 | Sollac | Method and installation for hot process and continuous dip coating of a metal strip |
| WO2014173663A1 (en) | 2013-04-26 | 2014-10-30 | Thyssenkrupp Steel Europe Ag | Device for the continuous hot-dip galvanizing of metal strip |
| KR20160003053A (en) * | 2013-04-26 | 2016-01-08 | 티센크루프 스틸 유럽 악티엔게젤샤프트 | Device for the continuous hot-dip galvanizing of metal strip |
| CN105358728A (en) * | 2013-04-26 | 2016-02-24 | 蒂森克虏伯钢铁欧洲股份公司 | Device for the continuous hot-dip galvanizing of metal strip |
| JP2016516904A (en) * | 2013-04-26 | 2016-06-09 | ティッセンクルップ スチール ヨーロッパ アーゲーＴｈｙｓｓｅｎｋｒｕｐｐ Ｓｔｅｅｌ Ｅｕｒｏｐｅ Ａｇ | Metal strip continuous hot dipping equipment |
| US9745653B2 (en) | 2013-04-26 | 2017-08-29 | Thyssenkrupp Steel Europe Ag | Apparatus for the continuous hot-dip coating of metal strip |
| WO2020224792A1 (en) * | 2019-05-08 | 2020-11-12 | Sms Group Gmbh | Method and device for rinsing an overflow chamber at the bath-side end of a snout of a device for hot-dip coating |
| CN113966407A (en) * | 2019-05-08 | 2022-01-21 | Sms集团有限公司 | Method and device for flushing an overflow chamber at the bath-side end of a snout of a hot-dip coating installation |
| RU2779077C1 (en) * | 2019-05-08 | 2022-08-31 | Смс Груп Гмбх | Method and device for flushing the overflow chamber at the end of the trunk of the coating device located on the side of the bath by immersion in the melt |
| CN113966407B (en) * | 2019-05-08 | 2023-10-27 | Sms集团有限公司 | Method and device for flushing an overflow chamber at the trough-side end of a furnace nose of a hot dip coating installation |
| FR3105796A1 (en) | 2019-12-26 | 2021-07-02 | Fives Stein | DEVICE FOR THE EVACUATION OF MATTE FROM THE SURFACE OF A LIQUID METAL BATH INSIDE A BELL DESCENT OF A LINE OF CONTINUOUS COATING OF A METAL BAND |
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