JP2010202951A - Method for producing hot-dip metal plated steel wire and device therefor - Google Patents

Method for producing hot-dip metal plated steel wire and device therefor Download PDF

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JP2010202951A
JP2010202951A JP2009052175A JP2009052175A JP2010202951A JP 2010202951 A JP2010202951 A JP 2010202951A JP 2009052175 A JP2009052175 A JP 2009052175A JP 2009052175 A JP2009052175 A JP 2009052175A JP 2010202951 A JP2010202951 A JP 2010202951A
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molten metal
steel wire
hot
gas
plated steel
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Junichi Kodama
順一 児玉
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Nippon Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a hot-dip metal plated steel wire and a device therefor which can stably perform the cleaning of the surface of a hot-dip metal for a long time without performing a manual cleaning operation, and to provide a device therefor. <P>SOLUTION: The hot-dip metal plating bath surface cleaning device comprises: a gas sealing part sealing the surface of a hot-dip metal in a plating bath with a nonoxidizing gas; a wiping means for regulating the coating weight of plating installed in the gas sealing part; and a hot-dip metal circulation means composed of a suction port sucking the hot-dip metal in the surface layer of the plating bath in the gas shielding part together with the nonoxidizing gas and an exhaust port releasing the sucked hot-dip metal to the outside of the gas shielding part. The device is preferably provided with a gas heating/introducing means of heating the nonoxidizing gas so as to be introduced into the gas shielding part. In the method for producing a hot-dip metal plated steel wire, 50 to 80% of the whole cross-sectional area of the suction port in the hot-dip metal circulation means is hot-dip metal dipped, and the hot-dip metal and the nonoxidizing gas are simultaneously sucked. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、溶融金属めっき浴の溶融金属の表面を清浄化する装置とこれを用いた溶融金属めっき鋼線の製造方法に関するものである。なお、鋼線は、一般に、鉄線と呼ばれる軟鋼線材を含むものである。   The present invention relates to an apparatus for cleaning the surface of a molten metal in a molten metal plating bath and a method for producing a molten metal plated steel wire using the apparatus. Note that the steel wire generally includes a mild steel wire called an iron wire.

溶融金属めっき鋼線(以下、単に「めっき鋼線」ともいう。)は、溶融金属めっき浴(以下、単に「めっき浴」ともいう。)に浸漬して引き上げ、めっき付着量をワイピング手段などによって調整し、製造されている。一般に、線材を溶融金属中を通過させる溶融めっきでは、めっき浴の表面に酸化物、カスなどが浮遊し、線材の表面に付着し、めっき層に不純物が混入するという問題がある。また、めっき付着量を増加させるために、絞りダイスなどの物理的なワイピング手段を用いない場合、めっき層の厚みが不均一になるという問題がある。   A molten metal-plated steel wire (hereinafter also simply referred to as “plated steel wire”) is dipped in a molten metal plating bath (hereinafter also simply referred to as “plating bath”) and pulled up, and the amount of plating is removed by a wiping means or the like. Adjusted and manufactured. In general, in hot dipping in which a wire is passed through molten metal, there is a problem that oxides, debris, etc. float on the surface of the plating bath, adhere to the surface of the wire, and impurities are mixed into the plating layer. In addition, when a physical wiping means such as a drawing die is not used in order to increase the plating adhesion amount, there is a problem that the thickness of the plating layer becomes non-uniform.

このような問題に対して、線材をめっき浴から引き上げる際に、非酸化性雰囲気中を通過させる方法が提案されている(例えば、特許文献1)。更に、めっき層の厚みを均一にするため、加熱された非酸化性雰囲気中を通過させて、溶融金属の濡れ性を高める方法が提案されている(例えば、特許文献2)。しかし、めっき浴の表面にガスシールを施しても、酸化物、カスなどをなくすことはできない。そこで、線材を引き上げる部分を非酸化ガスでシールし、更に、溶融金属を循環させる方法が提案されている(例えば、特許文献3)。   In order to solve such a problem, a method of passing through a non-oxidizing atmosphere when the wire is pulled up from the plating bath has been proposed (for example, Patent Document 1). Furthermore, in order to make the thickness of the plating layer uniform, a method has been proposed in which the wettability of the molten metal is increased by passing through a heated non-oxidizing atmosphere (for example, Patent Document 2). However, even if a gas seal is applied to the surface of the plating bath, oxides and debris cannot be eliminated. Therefore, a method has been proposed in which the portion where the wire is pulled up is sealed with a non-oxidizing gas and the molten metal is circulated (for example, Patent Document 3).

一方、溶融金属めっき鋼線を製造する場合、めっき浴中には、溶融金属の酸化や、溶融金属と鋼線との反応によって生成する金属間化合物など、浮遊性のトップドロスが形成される。そのため、ガスシールを行っている場合は、ガスシールを破り、作業員やロボット等がトップドロスの除去を行う。そのため、トップドロスを除去する際には、めっき鋼線の表面性状の悪化が避けられず、歩留まりを低下させる一因となっていた。   On the other hand, when manufacturing a molten metal plated steel wire, a floating top dross such as an intermetallic compound generated by oxidation of the molten metal or a reaction between the molten metal and the steel wire is formed in the plating bath. Therefore, when the gas seal is performed, the gas seal is broken, and an operator, a robot, or the like removes the top dross. For this reason, when removing the top dross, deterioration of the surface properties of the plated steel wire is unavoidable, which has been a cause of lowering the yield.

鋼板(ストリップ)の溶融めっきでは、これらの問題を解決するために、めっき浴の表面を清浄化する装置が提案されている(例えば、特許文献4、5)。このうち、特許文献4では、ストリップの立ち上がり部の浸漬トラフ形状を改善し、トップドロスを除去する方法が提案されている。しかし、この方法では大量に溶融金属を吸引する必要があり、装置構成が大がかりになる。また、特許文献5では、ストリップを引き上げる部分に堰を設けて、堰内部の溶融金属のトップドロスをポンプによって吸引して清浄化し、堰内部に戻す方法が提案されている。この方法は安定的に吸引することで機能が発揮されるものであるが、実際には吸引パイプの詰まりの発生や、トップドロスの粘性の増加によって吸引効率が低下するなど、安定的にトップドロスを除去できないという問題があった。   In the hot dipping of steel plates (strips), an apparatus for cleaning the surface of the plating bath has been proposed in order to solve these problems (for example, Patent Documents 4 and 5). Among these, Patent Document 4 proposes a method of improving the immersion trough shape of the rising portion of the strip and removing the top dross. However, in this method, it is necessary to suck a large amount of molten metal, and the apparatus configuration becomes large. Patent Document 5 proposes a method in which a dam is provided at a portion where the strip is pulled up, and the top dross of the molten metal inside the dam is sucked and cleaned by a pump and returned to the inside of the dam. This method can be used for stable suction, but in practice the top dross is stable because the suction efficiency decreases due to the clogging of the suction pipe and the increase in the viscosity of the top dross. There was a problem that could not be removed.

特開平2−129355号公報Japanese Patent Laid-Open No. 2-129355 特開平3−260045号公報JP-A-3-260045 特開平6−65703号公報JP-A-6-65703 特開平6−17214号公報JP-A-6-17214 実開昭55−155864号公報Japanese Utility Model Publication No. 55-155864

本発明は、このような実情に鑑みてなされたものであり、溶融金属の表面の清浄化を、人手による清掃作業ではなく、長時間安定して行うことができる、溶融金属めっき鋼線の製造方法およびその装置を提供するものである。   The present invention has been made in view of such circumstances, and manufacturing a molten metal-plated steel wire that can stably clean the surface of the molten metal for a long period of time, not manually. A method and apparatus are provided.

本発明者らは、溶融金属めっき鋼線の表面の汚れの発生状況とめっき浴の清浄方法との関係について、詳細に検討した。その結果、非酸化性ガスでシールされたガスシール部の内部に、ワイピングで除去された溶融金属が浴中に戻され、浴表面の温度低下による半溶融化およびFeAlからなるトップドロスの浮遊がガスシール部内のめっき浴の表面に生成し、溶融金属めっき鋼線の表面清浄が悪化することを明らかにした。 The present inventors have examined in detail the relationship between the occurrence of contamination on the surface of a molten metal plated steel wire and the plating bath cleaning method. As a result, the molten metal removed by wiping is returned into the bath inside the gas seal portion sealed with the non-oxidizing gas, and the top dross made of Fe 2 Al 5 is semi-molten due to the temperature drop of the bath surface. It was clarified that the surface cleanliness of hot-dip metal-plated steel wire deteriorated due to the formation of buoyancy on the surface of the plating bath in the gas seal.

本発明者らは、更に、めっき浴の表面の性状を効率よく安定的に吸引するためには、吸引口を浴中に完全に浸漬せず、溶融金属とガスとを同時に吸引することが有効であることを知見した。更に、めっき浴表面の温度低下を防止するために、加熱した非酸化性ガスを流入させることが有効であるという知見を得た。   Furthermore, the present inventors have also found that it is effective to suck the molten metal and gas simultaneously without completely immersing the suction port in the bath in order to suck the surface properties of the plating bath efficiently and stably. I found out. Furthermore, in order to prevent the temperature drop of the plating bath surface, it was found that it is effective to flow in a heated non-oxidizing gas.

本発明は、このような知見に基づいてなされたものであり、その要旨は以下のとおりである。   This invention is made | formed based on such knowledge, The summary is as follows.

(1) めっき浴の溶融金属の表面を非酸化性ガスでシールし、該ガスシール部内に設置されたワイピング手段によりめっき付着量を調整し、更に、該ガスシール部内のめっき浴表層の溶融金属を前記非酸化性ガスとともに吸引する吸引口及び吸引した溶融金属を前記ガスシール部外に放出する排出口を有する溶融金属循環手段により溶融金属を循環して溶融金属めっき浴表面清浄化をする溶融金属めっき鋼線の製造方法であって、溶融金属循環手段の吸引口全断面積の50〜80%を溶融金属浸漬し、溶融金属と非酸化性ガスとを同時に吸引することを特徴とする溶融金属めっき鋼線の製造方法。   (1) The surface of the molten metal in the plating bath is sealed with a non-oxidizing gas, the amount of plating is adjusted by wiping means installed in the gas seal portion, and the molten metal on the surface of the plating bath in the gas seal portion Molten metal is circulated by a molten metal circulating means having a suction port for sucking the non-oxidizing gas together with the non-oxidizing gas and a discharge port for discharging the sucked molten metal to the outside of the gas seal portion. A method for producing a metal-plated steel wire, wherein 50 to 80% of the entire cross-sectional area of the suction port of the molten metal circulating means is immersed in the molten metal, and the molten metal and the non-oxidizing gas are simultaneously sucked. Manufacturing method of metal plating steel wire.

(2) ワイピング手段によって、めっき付着量150g/m以上に調整することを特徴とする上記(1)に記載の溶融金属めっき鋼線の製造方法。 (2) The method for producing a hot-dip galvanized steel wire according to (1) above, wherein the amount of plating adhesion is adjusted to 150 g / m 2 or more by wiping means.

(3) 複数本のめっき線を同時に通線することを特徴とする上記(1)又は(2)に記載の溶融金属めっき鋼線の製造方法。   (3) The method for producing a hot-dip galvanized steel wire according to (1) or (2), wherein a plurality of plated wires are simultaneously passed.

(4) 溶融めっき鋼線をガスシール部外に引き出す出口部の大気開放断面積が、該溶融金属めっき鋼線の断面積の20倍以上、50倍以下であることを特徴とする上記(1)〜(3)の何れか1項に記載の溶融金属めっき鋼線の製造方法。   (4) The above-described (1), wherein the cross-sectional area of the outlet portion through which the hot dipped steel wire is drawn out of the gas seal portion is 20 to 50 times the cross-sectional area of the hot metal plated steel wire. The manufacturing method of the hot-dip metal-plated steel wire of any one of (1)-(3).

(5) 非酸化性ガスを450℃以上に加熱して、ガスシール部に導入することを特徴とする上記(1)〜(4)の何れか1項に記載の溶融金属めっき鋼線の製造方法。   (5) The non-oxidizing gas is heated to 450 ° C. or higher and introduced into the gas seal portion, wherein the hot-dip galvanized steel wire according to any one of the above (1) to (4) is produced Method.

(6) 溶融金属循環手段が吸引した溶融金属を、溶融金属放出制御手段によって、該溶融金属の放出方向及び放出速度を制御してガスシール部外に放出し、溶融金属めっき浴の最高温度と最低温度との差を5℃以内にすることを特徴とする上記(1)〜(5)の何れか1項に記載の溶融金属めっき鋼線の製造方法。   (6) The molten metal sucked by the molten metal circulation means is discharged out of the gas seal portion by controlling the discharge direction and the discharge speed of the molten metal by the molten metal release control means, and the maximum temperature of the molten metal plating bath The method for producing a molten metal-plated steel wire according to any one of (1) to (5) above, wherein a difference from the minimum temperature is within 5 ° C.

(7) めっき浴の溶融金属の表面を非酸化性ガスでシールするガスシール部と、該ガスシール部内に設置されためっき付着量を調整するワイピング手段と、更に、該ガスシール部内のめっき浴表層の溶融金属を前記非酸化性ガスとともに吸引する吸引口及び吸引した溶融金属を前記ガスシール部外に放出する排出口を有する溶融金属循環手段とからなることを特徴とする溶融金属めっき鋼線の製造装置。   (7) A gas seal portion for sealing the surface of the molten metal of the plating bath with a non-oxidizing gas, a wiping means for adjusting the amount of plating attached in the gas seal portion, and a plating bath in the gas seal portion A molten metal plated steel wire comprising: a suction port for sucking the molten metal of the surface layer together with the non-oxidizing gas; and a molten metal circulating means having a discharge port for discharging the sucked molten metal to the outside of the gas seal portion. Manufacturing equipment.

(8) 更に、非酸化性ガスを加熱し、ガスシール部に導入するガス加熱導入手段を設けたことを特徴とする請求項7に記載の溶融金属めっき鋼線の製造装置。   (8) The apparatus for producing a molten metal-plated steel wire according to (7), further comprising gas heating introduction means for heating the non-oxidizing gas and introducing it into the gas seal portion.

(9) 前記溶融金属循環手段が、放出する溶融金属の放出方向及び放出速度を調整する溶融金属放出制御手段を有することを特徴とする上記(7)又は(8)に記載の溶融金属めっき鋼線の製造装置。   (9) The molten metal plated steel according to (7) or (8), wherein the molten metal circulating means has a molten metal release control means for adjusting a discharge direction and a discharge speed of the molten metal to be discharged. Wire manufacturing equipment.

(10) 前記溶融金属循環手段と、前記ガスシール部と、前記ワイピング手段とが一体に構成され、上下左右に移動可能な機構を有することを特徴とする上記(6)〜(9)の何れか1項に記載の溶融金属めっき鋼線の製造装置。   (10) Any one of the above (6) to (9), wherein the molten metal circulating means, the gas seal portion, and the wiping means are integrally configured and have a mechanism that can move up and down and left and right. The manufacturing apparatus of the hot-dip metal-plated steel wire of Claim 1.

(11) 前記ワイピング手段が電磁ワイピング装置であることを特徴とする上記(7)〜(10)の何れか1項に記載の溶融金属めっき鋼線の製造装置。   (11) The apparatus for producing a hot-dip galvanized steel wire according to any one of (7) to (10), wherein the wiping means is an electromagnetic wiping device.

本発明によれば、めっき鋼線が通線されるガスシール部の溶融金属の表面に生成するトップドロスを、ガスシール部の外へ排出することができるため、常に、めっき鋼線を引き上げる部分の溶融金属の表面が清浄に保たれ、表面性状の良好な溶融金属めっき鋼線を安定して製造することが可能になる。更に、ガスシール部の外で、半凝固金属等の汚れを連続的に効率よく安定的に除去することが可能になり、人力による作業負荷が軽減され、複数のめっき鋼線を通線する場合には、ワイヤピッチを狭めることが可能なマルチワイピング装置の適用が可能になる。また、溶融金属のめっき浴の温度が均一になると、被めっき鋼線と溶融金属との反応性が安定化され、めっき付着量、めっき組成の変化が小さい品質の安定した溶融金属めっき鋼線を得ることができるなど、産業上の貢献が極めて顕著である。   According to the present invention, since the top dross generated on the surface of the molten metal of the gas seal portion through which the plated steel wire is passed can be discharged out of the gas seal portion, the portion where the plated steel wire is always pulled up The surface of the molten metal is kept clean, and it becomes possible to stably produce a molten metal-plated steel wire having good surface properties. In addition, it is possible to remove semi-solid metal and other contaminants continuously and efficiently outside the gas seal, reducing the work load due to human power and passing through multiple plated steel wires. In this case, a multi-wiping device capable of narrowing the wire pitch can be applied. In addition, when the temperature of the molten metal plating bath becomes uniform, the reactivity between the steel wire to be plated and the molten metal is stabilized, and a stable molten metal plated steel wire with a small amount of plating adhesion and plating composition can be obtained. The contribution to the industry is extremely remarkable.

本発明の装置の設置構成を示す図で、(a)は正面図、(b)は側面図である。It is a figure which shows the installation structure of the apparatus of this invention, (a) is a front view, (b) is a side view. 本発明の装置のめっき上設置概略図である、(a)は平面図、(b)は側面図である。It is the installation top view schematic of the apparatus of this invention, (a) is a top view, (b) is a side view. 吸引口の溶融金属浸漬比率(%)と連続操業時間(H)の関係を示す図である。It is a figure which shows the relationship between the molten metal immersion ratio (%) of a suction opening, and continuous operation time (H).

以下本発明を詳細に説明する。
本発明は、非酸化性ガスでシールするガスシール機構、溶融金属のワイピング機構、溶融金属の表面に生成するトップドロスと、非酸化性ガスとを同時に吸引する機構からなる装置を使用するものである。本発明の装置を用いることにより、めっき浴の表面に浮遊しているトップドロスを確実に除去することができる。
The present invention will be described in detail below.
The present invention uses a device comprising a gas sealing mechanism for sealing with a non-oxidizing gas, a wiping mechanism for molten metal, a top dross generated on the surface of the molten metal, and a mechanism for simultaneously sucking non-oxidizing gas. is there. By using the apparatus of the present invention, the top dross floating on the surface of the plating bath can be reliably removed.

また、溶融金属回収手段の吸引口を、完全に溶融金属に漬浸させず、溶融金属への浸漬部面積を吸引口全断面積の50%〜80%とすることにより、吸引効率を高め、また、吸引された溶融金属から、トップドロスを除去した後、溶融金属をガスシール部の外へ排出し、めっき浴中で溶融金属を効率良く循環させることにより、浴槽内溶融金属の温度分布を均一に保ち。更に、ガスシール部の溶融金属表面の温度が低下しないように、非酸化性ガスを加熱して、ガスシール部内に導入機構を有することにより、より安定して連続的に使用することが出来るものである。   In addition, the suction port of the molten metal recovery means is not completely immersed in the molten metal, and the area of the portion immersed in the molten metal is 50% to 80% of the total cross-sectional area of the suction port, thereby increasing the suction efficiency. In addition, after removing the top dross from the sucked molten metal, the molten metal is discharged out of the gas seal part, and the molten metal is circulated efficiently in the plating bath, so that the temperature distribution of the molten metal in the bath is increased. Keep uniform. Furthermore, it can be used more stably and continuously by heating the non-oxidizing gas so that the temperature of the molten metal surface of the gas seal part does not decrease and having an introduction mechanism in the gas seal part. It is.

以下、本発明の実施の形態について図1および図2に基づいて述べる   Hereinafter, embodiments of the present invention will be described with reference to FIG. 1 and FIG.

ガスシール部に導入する非酸化性ガスは、図1、図2に示すように、本装置に設置した非酸化性ガス導入管1を経て窒素、アルゴン等の不活性ガスを導入する。特に、経済性を考慮すると窒素ガスが好適である。また、非酸化性ガスをガスシール部内2に導入する際には、ガス加熱導入手段によって加熱し、高温非酸化性ガス12としてから導入することが好ましい。加熱された高温非酸化性ガス12の導入により、めっき浴の表面の温度低下が防止され、めっき浴の表面のドロス等の浮遊物の粘性を低くすることができる。めっき浴の溶融金属3が溶融亜鉛である場合、表面の温度を、亜鉛の融点である420℃以下に低下することを防ぐために非酸化性ガスの温度を450℃以上にするものである。これにより、溶融金属の表面の流動性が低下せず、吸引性の悪化、吸引口でのつまりを防止することができる。より好ましい非酸化性ガスの温度は、500℃以上である。非酸化性ガスの加熱温度の上限は特に制限しないが、高温ガスを吹き付けることによりめっき鋼線とともに引き上げられた未凝固めっき層の溶解による表面性状の悪化、配管材料、不活性シール部材の耐熱性から600℃が好ましい上限である。   As shown in FIGS. 1 and 2, the non-oxidizing gas introduced into the gas seal portion introduces an inert gas such as nitrogen or argon through a non-oxidizing gas introduction pipe 1 installed in the apparatus. Nitrogen gas is particularly preferable in consideration of economy. In addition, when introducing the non-oxidizing gas into the gas seal portion 2, it is preferable to introduce the non-oxidizing gas after being heated by the gas heating introduction means to form the high temperature non-oxidizing gas 12. The introduction of the heated high-temperature non-oxidizing gas 12 prevents the temperature of the plating bath surface from being lowered, and the viscosity of suspended matter such as dross on the surface of the plating bath can be lowered. When the molten metal 3 of the plating bath is molten zinc, the temperature of the non-oxidizing gas is set to 450 ° C. or higher in order to prevent the surface temperature from being lowered to 420 ° C. or lower which is the melting point of zinc. Thereby, the fluidity | liquidity of the surface of a molten metal does not fall, but deterioration of attraction | suction and clogging at an inlet can be prevented. A more preferable temperature of the non-oxidizing gas is 500 ° C. or higher. The upper limit of the heating temperature of the non-oxidizing gas is not particularly limited, but the surface properties deteriorate due to dissolution of the unsolidified plating layer pulled up together with the plated steel wire by blowing high temperature gas, the heat resistance of the piping material and the inert seal member To 600 ° C. is a preferable upper limit.

非酸化性ガスの加熱方法は、特に限定されないが、例えば、燃焼ガスとの熱交換、抵抗線ヒーター内をガス配管内に設置する等の熱交換方法を適用することができる。   The heating method of the non-oxidizing gas is not particularly limited, and for example, a heat exchange method such as heat exchange with the combustion gas or installation of the resistance wire heater in the gas pipe can be applied.

本発明ではめっき付着量を制御するため、非接触式のワイピング手段を使用する。ワイピング装置4はガスシール部2の出側に配置される。ワイピング手段は、ノズルからガスを噴射するガスワイピング、ワイピングに電磁力を用いる電磁ワイピング装置など、特に限定されるものではない。電磁ワイピング装置は電力を調整することで、めっき鋼線に作用するローレンツ力を制御して溶融金属を掻き落とす作用を有しており、めっき鋼線5の円周方向のめっき付着量の均一性、めっき付着量の制御の容易性を考えると電磁ワイピング装置の適用が好ましい。該ワイピング装置により調整しためっき付着量が150g/m以下ではめっき層の腐食により鋼線の耐食性が低下し、寿命が低下するためめっき付着量の下限を150g/mとしたが、170g/mとすることが好ましい。上限は特に制限しないが、400g/m以上の付着量とするためには高速で通線する必要があり、めっき浴から引き上げ後めっき層の冷却凝固までの間の振動により表面性状が悪化することから良好な表面性状のめっき鉄線を得るためには400g/mを条件とするのが好ましい。 In the present invention, a non-contact type wiping means is used to control the plating adhesion amount. The wiping device 4 is disposed on the exit side of the gas seal portion 2. The wiping means is not particularly limited, such as gas wiping for injecting gas from a nozzle, and an electromagnetic wiping device using electromagnetic force for wiping. The electromagnetic wiping device adjusts the electric power to control the Lorentz force acting on the plated steel wire to scrape the molten metal, and the uniformity of the coating amount in the circumferential direction of the plated steel wire 5 Considering the ease of control of the plating adhesion amount, application of an electromagnetic wiping device is preferable. The coating weight was adjusted by wiping device decreases the corrosion resistance of the steel wire due to corrosion of the plating layer is 150 g / m 2 or less, but life was 150 g / m 2 the lower limit of coating weight to lower, 170 g / it is preferable that the m 2. Although the upper limit is not particularly limited, in order to obtain an adhesion amount of 400 g / m 2 or more, it is necessary to pass through at a high speed, and the surface properties deteriorate due to vibrations from the plating bath to the cooling and solidification of the plated layer. Therefore, in order to obtain a plated iron wire having a good surface property, it is preferable that the condition is 400 g / m 2 .

本発明は、溶融金属循環手段によって、ガスシール部の溶融金属を、溶融金属吸引管6を経て非酸化性ガスとともに吸引し、溶融金属をガスシール部外のめっき浴中に流出させることを最大の特徴とするものである。従来は、吸引口を溶融金属内に完全に浸漬していたため、溶融金属の表面を浮遊する不純物等を効率良く吸引することができなかった。そのため、本発明では、ガスシール部の溶融金属を吸引する溶融金属回収手段によって、トップドロスと非酸化性ガスとを同時に吸引することとした。これにより、めっき浴の溶融金属の表面を非酸化性ガスが高速で移動し、めっき浴の表面を浮遊する不純物を効率よく吸引することができるものである。   According to the present invention, the molten metal circulation means sucks the molten metal in the gas seal portion together with the non-oxidizing gas through the molten metal suction pipe 6 and flows the molten metal into the plating bath outside the gas seal portion. It is the feature of. Conventionally, since the suction port is completely immersed in the molten metal, impurities and the like floating on the surface of the molten metal cannot be efficiently sucked. Therefore, in the present invention, the top dross and the non-oxidizing gas are simultaneously sucked by the molten metal recovery means for sucking the molten metal in the gas seal portion. As a result, the non-oxidizing gas moves at high speed on the surface of the molten metal in the plating bath, and the impurities floating on the surface of the plating bath can be efficiently sucked.

そのため、溶融金属循環手段の吸引口7は、溶融金属3とともに非酸化性ガスを吸引できるように設置することが重要である。   Therefore, it is important to install the suction port 7 of the molten metal circulating means so that the non-oxidizing gas can be sucked together with the molten metal 3.

図3に吸引口の溶融金属浸漬断面積比率と連続操業時間の関係を示す。図3に示すように、吸引口のうち、溶融金属に浸漬する部分の断面積が、吸引口の全断面積の50〜80%にすることによって、吸引口および吸引管の詰まりもなく、溶融金属表面の汚れを連続的に除去することが可能となり安定して連続してめっき処理が可能となる。吸引口の、溶融金属に浸漬する部分の断面積が全断面積の50%未満ではガスの吸引比率が多くなり、溶融金属表面に浮遊する汚れを効率良く吸引することができなくなる。また、吸引口全断面積の80%以上を溶融金属に浸漬してしまうとガスの吸引比率が低下し、溶融金属表面の汚れの吸引効率が低下する。即ち、非酸化性ガスと溶融金属の吸引比率を適正に制御することにより、ガスシール部内の溶融金属表面のトップドロスを確実に除去することができるものである。   FIG. 3 shows the relationship between the molten metal immersion cross-sectional area ratio of the suction port and the continuous operation time. As shown in FIG. 3, by making the cross-sectional area of the portion of the suction port immersed in the molten metal 50 to 80% of the total cross-sectional area of the suction port, the suction port and the suction pipe are not clogged and melted. Dirt on the metal surface can be continuously removed, and plating can be stably and continuously performed. If the cross-sectional area of the portion of the suction port immersed in the molten metal is less than 50% of the total cross-sectional area, the gas suction ratio increases, and dirt floating on the molten metal surface cannot be efficiently sucked. Moreover, if 80% or more of the entire cross-sectional area of the suction port is immersed in the molten metal, the gas suction ratio is lowered, and the suction efficiency of dirt on the surface of the molten metal is lowered. That is, the top dross on the surface of the molten metal in the gas seal portion can be reliably removed by appropriately controlling the suction ratio of the non-oxidizing gas and the molten metal.

吸引量は溶融金属浴表面のシールド部面積、吸引口浸漬状況、溶融金属の粘性、引き上げられた溶融金属がワイピングにより除去され浴表面に戻される量により適正範囲が異なる。従って、適正条件は実操業のなかで調整する必要があり、吸引流量は浴表面のドロス等の不純物がめっき線表面に引き上げられないように下限を調整する必要がある。一方、溶融金属の吸引量が多すぎる場合は溶融金属の流れが強くなるためにめっき線表面に乱れが発生し、表面性状が悪化する。   The appropriate amount of suction varies depending on the shield area on the surface of the molten metal bath, the state of immersion in the suction port, the viscosity of the molten metal, and the amount of the molten metal pulled up and removed by wiping and returned to the bath surface. Accordingly, it is necessary to adjust the appropriate conditions during actual operation, and the lower limit of the suction flow rate must be adjusted so that impurities such as dross on the bath surface are not pulled up to the surface of the plating wire. On the other hand, when the molten metal suction amount is too large, the flow of the molten metal becomes strong, so that the surface of the plated wire is disturbed and the surface properties are deteriorated.

本発明の装置では吸引量は2l/min〜100l/minの範囲で良好な操業が可能であった。   In the apparatus of the present invention, good operation was possible when the suction amount was in the range of 2 l / min to 100 l / min.

本発明の装置は溶融金属を、例えば、吸引ポンプによって、吸引口から排出口8に循環させ、溶融金属浴槽内に流れを形成させ、槽内温度を均一に保つ機能も有する。めっき浴から引き上げられためっき鋼線5をワイピング装置4で掻き落した半凝固状態の溶融金属あるいはトップドロスを溶融金属吸引管6で吸引し、排出口8からめっき浴内に放出することで、半溶融状態であった金属は再溶解され、トップドロスは、ガスシール部外のめっき浴の表面に浮遊するため、除去作業が容易となる。   The apparatus of the present invention also has a function of circulating molten metal from the suction port to the discharge port 8 by, for example, a suction pump, forming a flow in the molten metal bath, and keeping the temperature in the tank uniform. By sucking the semi-solid state molten metal or top dross scraped off by the wiping device 4 from the plating steel wire 5 pulled up from the plating bath with the molten metal suction pipe 6 and releasing it into the plating bath from the discharge port 8, The metal that has been in a semi-molten state is redissolved, and the top dross floats on the surface of the plating bath outside the gas seal portion, so that the removal operation is facilitated.

特に、図1(b)、図2(b)に示すように、複数のめっき鋼線を同時に通線する場合には、ワイヤピッチを狭めることも可能なマルチワイピング装置としての適用が可能になる。   In particular, as shown in FIGS. 1 (b) and 2 (b), when a plurality of plated steel wires are simultaneously passed, application as a multi-wiping device capable of narrowing the wire pitch becomes possible. .

さらに本発明の装置は吸引した溶融金属をめっき浴中に放出することで、めっき浴の溶融金属が循環し、めっき浴槽内の温度を均一にすることが可能になる。また、本発明の装置は、溶融金属放出制御手段により、溶融金属循環手段が吸引した溶融金属を放出する方向、流速を調整する機構を有している。流速の調整は放出パイプの直径を変えても制御できるが、吸引ポンプ11の回転数を変えることで容易に調整可能である。溶融金属浴内の金属温度は外壁に近い部分で低下するため、外壁に沿って溶融機金属の流れが発生するように吐出方向を調整する機構も有している。   Furthermore, the apparatus of this invention discharge | releases the attracted molten metal in a plating bath, The molten metal of a plating bath circulates, and it becomes possible to make the temperature in a plating bath uniform. In addition, the apparatus of the present invention has a mechanism for adjusting the flow direction and flow rate of the molten metal released by the molten metal circulation means by the molten metal release control means. The flow rate can be controlled by changing the diameter of the discharge pipe, but can be easily adjusted by changing the number of rotations of the suction pump 11. Since the metal temperature in the molten metal bath decreases at a portion close to the outer wall, it has a mechanism for adjusting the discharge direction so that the flow of the melter metal occurs along the outer wall.

この結果、めっき浴の温度は極めて均一になり、最高温度と最低温度との差を5℃以内にすることができ、めっき鋼線を通線する位置での温度変化に伴うめっき付着量、地鉄との反応性の差を小さくすることができ、品質の安定しためっき鋼線を製造することが可能になる。温度の測定は図2(a)、(b)に×印で示した。測温位置は被めっき鋼線の溶融金属への入線部近傍で炉壁から約500mmの位置で、浴幅方向に均等に3等分した位置で、深さ方向に表層から50mm、中間、浴の底から50mmの9点とめっき線引き上げ近傍で、シール部と緩衝しない位置で、浴幅方向に3箇所で、深さ方向に表層から50mm、中間、浴の底から50mmの9点の合計18点で、溶融金属の温度をK熱電対を浸漬して実測した。   As a result, the temperature of the plating bath becomes extremely uniform, and the difference between the maximum temperature and the minimum temperature can be kept within 5 ° C. A difference in reactivity with iron can be reduced, and a plated steel wire with stable quality can be manufactured. The measurement of temperature is shown by x in FIGS. 2 (a) and 2 (b). The temperature measurement position is about 500 mm from the furnace wall near the part where the steel wire to be melted enters the molten metal, and is equally divided into 3 parts in the bath width direction, 50 mm from the surface layer in the depth direction, intermediate, bath 9 points of 50 mm from the bottom of the bath and 9 points of 3 points in the bath width direction, 50 mm from the surface layer in the depth direction, 50 mm from the bottom of the bath in the depth direction, in the vicinity of the plating line pulling up, at the position where the seal part does not buffer At 18 points, the temperature of the molten metal was measured by immersing a K thermocouple.

連続めっき操業時には、ガスシール部内の溶融金属と、溶融金属循環手段の吸引口との位置関係を、外から目視で確認することができない。そのため、溶融金属循環手段と、ガスシール部2と、ワイピング手段4とを一体化して設置することが好ましい。例えば、図1(a)に示すように、シールド壁9に溶融金属吸引管6を一体に設定することによって、装置の外部から吸引位置と溶融金属表面の相対的な位置が容易にわかるようになる。その結果、溶融金属の浴面が変動した場合にも、溶融金属吸引管6の、溶融金属を吸引する部分と、非酸化性ガスを吸入部分との断面積比率を、適宜、調整することが可能になる。また、本装置の設置位置を調整するためには、電動ねじ式、エアーシリンダ、油圧シリンダー等の方法により上下、左右に移動可能な機構を設けることが好ましい。   At the time of continuous plating operation, the positional relationship between the molten metal in the gas seal portion and the suction port of the molten metal circulation means cannot be visually confirmed from the outside. Therefore, it is preferable to install the molten metal circulating means, the gas seal portion 2 and the wiping means 4 in an integrated manner. For example, as shown in FIG. 1A, by setting the molten metal suction tube 6 integrally with the shield wall 9, the relative position between the suction position and the molten metal surface can be easily understood from the outside of the apparatus. Become. As a result, even when the bath surface of the molten metal fluctuates, the ratio of the cross-sectional area of the molten metal suction pipe 6 between the portion for sucking molten metal and the portion for sucking non-oxidizing gas can be adjusted as appropriate. It becomes possible. Moreover, in order to adjust the installation position of this apparatus, it is preferable to provide a mechanism that can be moved up and down and left and right by a method such as an electric screw type, an air cylinder, and a hydraulic cylinder.

また、ガスシール部2は、非酸化性ガスを外気から遮断するために、外方への開口部を最低限とすることが好ましい。そのため、図2(a)に示すように、溶融めっき鋼線をガスシール部外に引き出す出口部10の断面積を、めっき鋼線が通過するのに必要な、最低限の断面積とすることが好ましい。一方、めっき鋼線は連続的に高速で移動しているため、振動が生じると、めっき鋼線の表面の未凝固金属がガスシール部の出口部に接触し、めっき鋼線の表面肌が悪化することがある。鋼線の断面と出口部の断面積との比の適正化を図った。   Further, it is preferable that the gas seal portion 2 has a minimum opening to the outside in order to block the non-oxidizing gas from the outside air. Therefore, as shown in FIG. 2 (a), the cross-sectional area of the outlet portion 10 that draws the hot-dip plated steel wire out of the gas seal portion should be the minimum cross-sectional area required for the plated steel wire to pass through. Is preferred. On the other hand, since the plated steel wire is continuously moving at a high speed, when vibration occurs, the unsolidified metal on the surface of the plated steel wire comes into contact with the outlet portion of the gas seal portion, and the surface skin of the plated steel wire deteriorates. There are things to do. The ratio between the cross section of the steel wire and the cross section of the outlet was optimized.

鋼線の振動によってめっき線が物理的接触を起こさない開口部断面積は、鋼線の断面積の20倍以上である。一方、大気に開放されている面積が大きくなるとガスシール効果が小さくなり、浴表面の酸化が進行し、めっき鋼線の表面性状が悪化することがある。そのため、溶融金属めっき鋼線をガスシール部外に引き出す出口部の大気開放断面積の最大はめっき鋼線の断面積の50倍以下とすることが好ましい。   The opening cross-sectional area where the plated wire does not cause physical contact by vibration of the steel wire is 20 times or more the cross-sectional area of the steel wire. On the other hand, when the area open to the atmosphere is increased, the gas sealing effect is reduced, oxidation of the bath surface proceeds, and the surface properties of the plated steel wire may be deteriorated. Therefore, it is preferable that the maximum of the air-release cross-sectional area of the outlet portion where the molten metal plated steel wire is drawn out of the gas seal portion is 50 times or less the cross-sectional area of the plated steel wire.

以下に本発明の実施例を示す。なお、本発明は、以下の実施例により制限されるものではない。   Examples of the present invention are shown below. In addition, this invention is not restrict | limited by a following example.

JIS SWRM6Kに相当する、Siを0.22%含む軟鋼を熱間圧延で直径5.5mmに圧延後、メカニカルデスケーリング工程で線材表面の酸化スケールを除去した後、直径4mmまで伸線加工した。この伸線材を750℃に加熱した焼鈍炉内で連続的に加熱した後、500℃以下まで空冷し、16%の塩酸濃度の酸液中を通過させ、焼鈍で形成した酸化スケールを除去したのち塩化アンモニウムを主体とするフラックスに浸漬、乾燥後、アルミを0.2〜0.5%含む亜鉛浴中に浸漬してめっきを形成した。なお、ワイヤは、ピッチ25mmの間隔で5本を同時にガスシール部内に通線した。シール部の浴浸漬部形状は幅300mm、長手方向200mmとした。   After rolling mild steel containing 0.22% Si, corresponding to JIS SWRM6K, to a diameter of 5.5 mm by hot rolling, the oxide scale on the surface of the wire was removed in a mechanical descaling step, and then drawn to a diameter of 4 mm. This wire is continuously heated in an annealing furnace heated to 750 ° C., then air-cooled to 500 ° C. or lower, passed through an acid solution having a hydrochloric acid concentration of 16%, and the oxide scale formed by annealing is removed. After dipping in a flux mainly composed of ammonium chloride and drying, it was immersed in a zinc bath containing 0.2 to 0.5% aluminum to form a plating. Note that five wires were simultaneously inserted into the gas seal portion at intervals of a pitch of 25 mm. The bath immersion part shape of the seal part was 300 mm in width and 200 mm in the longitudinal direction.

めっき浴から引き上げた後、電磁ワイピングを行い、水冷凝固させて、めっき鋼線を製造した。電磁ワイピングは、鋼線の周囲に設けた、銅パイプを配置した水冷コイルによって行った。水冷コイルに高周波電源を通し、誘導磁気を発生させ、めっき浴から引き上げた直後の鋼線に、溶融金属が未凝固の状態でワイヤの周囲にローレンツ力を働かせて未凝固金属を浴中に欠き落とす力を発生させ、ワイピングを行った。   After lifting from the plating bath, electromagnetic wiping was performed and water-cooled solidification was performed to produce a plated steel wire. Electromagnetic wiping was performed by a water-cooled coil provided with a copper pipe around the steel wire. A high-frequency power supply is passed through a water-cooled coil, induction magnetism is generated, and Lorenz force is applied to the steel wire immediately after it is pulled out of the plating bath while the molten metal is in an unsolidified state so that the unsolidified metal is missing in the bath. Wiping was performed by generating a force to drop.

ここで、鋼線を溶融金属から引き上げるガスシール部内には、図1に示した、ガスと溶融金属とを吸引する吸引口を設置した。吸引口と排出口の間には、吸引ポンプを設け、吸引流量はポンプの回転数を調整して10l/minとした。溶融金属の排出口を浴中の溶融金属が浴中内で流動、攪拌するように設置した。めっき浴表面のガスシール部には、窒素ガスを導入し、浴表面の酸化を防止した。なお、窒素ガスを加熱できるように、加熱装置を設けた。   Here, the suction port for sucking the gas and the molten metal shown in FIG. 1 was installed in the gas seal portion for pulling the steel wire from the molten metal. A suction pump was provided between the suction port and the discharge port, and the suction flow rate was adjusted to 10 l / min by adjusting the number of rotations of the pump. The molten metal discharge port was installed so that the molten metal in the bath flowed and stirred in the bath. Nitrogen gas was introduced into the gas seal portion on the plating bath surface to prevent oxidation of the bath surface. A heating device was provided so that the nitrogen gas could be heated.

吸引口の断面部の浸漬比率、ガスシール部に導入する窒素ガスの加熱温度、更には、めっき鋼線をガスシール部外に引き出す出口部の大気開放断面積を変化させて、めっき鋼線を製造した。得られためっき鋼線のめっき付着量はJIS H 0401 記載の塩化アンチモン法により測定し、表面性状は目視観察し、長さ1m当たりの突起(ブツ)物の生成数が1個以下を良好とし、2個以上生成している場合は不良とした。なお、窒素ガスの温度は、常温から500℃まで変化させた。   Change the immersion ratio of the cross section of the suction port, the heating temperature of the nitrogen gas to be introduced into the gas seal, and the atmospheric open cross-sectional area of the outlet that draws the plated steel wire out of the gas seal. Manufactured. The coating amount of the obtained plated steel wire is measured by the antimony chloride method described in JIS H 0401, the surface properties are visually observed, and the number of protrusions per 1 m in length is considered to be good. When two or more pieces were produced, it was regarded as defective. The temperature of nitrogen gas was changed from normal temperature to 500 ° C.

表1に評価結果を示す。本発明の装置を用いてめっき鋼線を製造した場合は連続操業を行っても引き上げ部浴表層の汚れが無く、常に正常な状態が維持され、表面性状の良好なめっき鋼線が安定して製造できた。一方、吸引口のうち、めっき浴に浸漬された部分の断面積比率が、50%未満ではガスの吸引比率が増し、80%を超えると溶融金属を安定して吸引することが出来ず、浴表面を清浄化することができない。そのため、表面性状が安定しためっき鋼線の製造ができない。   Table 1 shows the evaluation results. When the plated steel wire is manufactured using the apparatus of the present invention, even if continuous operation is performed, there is no dirt on the surface layer of the raised portion bath, the normal state is always maintained, and the plated steel wire with good surface properties is stable. I was able to manufacture it. On the other hand, if the cross-sectional area ratio of the portion of the suction port immersed in the plating bath is less than 50%, the gas suction ratio increases, and if it exceeds 80%, the molten metal cannot be stably sucked. The surface cannot be cleaned. Therefore, it is impossible to produce a plated steel wire having a stable surface property.

Figure 2010202951
Figure 2010202951

また、窒素ガス温度が低い場合は、めっき浴の表面の温度が低下し、吸引パイプ詰まりが発生し、めっき鋼線の表面性状がやや低下した。また、鋼線の線径に対して、鋼線を引き出す出口部の大気開放断面積が大きい場合は、ガスシールがやや不十分になり、めっき浴表面の酸化が発生し、吸引パイプ詰まりが発生し、めっき鋼線の表面性状がやや悪化した。一方、鋼線の線径に対して、鋼線を引き出す出口部の大気開放断面積が小さい場合は、鋼線が振動によって接触し、めっき鋼線の表面性状が、やや悪化した。   Moreover, when the nitrogen gas temperature was low, the temperature of the surface of the plating bath was lowered, the suction pipe was clogged, and the surface properties of the plated steel wire were slightly lowered. In addition, if the cross-sectional area of the outlet where the steel wire is drawn out is larger than the diameter of the steel wire, the gas seal will be slightly insufficient, the plating bath surface will be oxidized, and the suction pipe will be clogged. However, the surface properties of the plated steel wire were slightly deteriorated. On the other hand, when the air opening cross-sectional area of the outlet portion through which the steel wire was drawn out was small relative to the wire diameter of the steel wire, the steel wire contacted by vibration, and the surface properties of the plated steel wire were slightly deteriorated.

また、本発明の方法では溶融機金属の温度が458〜565℃の範囲に制御されたが、溶融金属を攪拌しない場合は、めっき時間の経過とともに溶融機金属温度変化が大きくなり、通線部位毎のめっき付着量が変化し、めっき鋼線の円周方向のめっき厚さ変動が大きくなった。   Further, in the method of the present invention, the temperature of the melter metal was controlled in the range of 458 to 565 ° C., but when the molten metal was not stirred, the melter metal temperature change increased with the lapse of the plating time, The amount of plating adhesion changed every time, and the plating thickness fluctuation in the circumferential direction of the plated steel wire increased.

以上のように、本発明の装置を溶融金属引き上げ面浴上に設置することにより、めっき浴表面の汚れや浮遊物を連続的に除去することが可能となり、安定して複数本のめっき鋼線を安定して製造することが可能となった。   As described above, by installing the apparatus of the present invention on the molten metal pulling surface bath, it becomes possible to continuously remove dirt and suspended matters on the surface of the plating bath, and stably provide a plurality of plated steel wires. Can be stably produced.

1:非酸化性ガス導入管
2:ガスシール部
3:溶融金属
4:ワイピング装置
5:めっき鋼線
6:溶融金属吸引管
7:吸引口
8:排出口
9:シールド壁
10:出口部
11:吸引ポンプ
12:高温非酸化性ガス
1: Non-oxidizing gas introduction pipe 2: Gas seal part 3: Molten metal 4: Wiping device 5: Plating steel wire 6: Molten metal suction pipe 7: Suction port 8: Discharge port 9: Shield wall 10: Outlet part 11: Suction pump 12: high temperature non-oxidizing gas

Claims (11)

めっき浴の溶融金属の表面を非酸化性ガスでシールし、該ガスシール部内に設置されたワイピング手段によりめっき付着量を調整し、更に、該ガスシール部内のめっき浴表層の溶融金属を前記非酸化性ガスとともに吸引する吸引口及び吸引した溶融金属を前記ガスシール部外に放出する排出口を有する溶融金属循環手段により溶融金属を循環して溶融金属めっき浴表面清浄化をする溶融金属めっき鋼線の製造方法であって、溶融金属循環手段の吸引口全断面積の50〜80%を溶融金属浸漬し、溶融金属と非酸化性ガスとを同時に吸引することを特徴とする溶融金属めっき鋼線の製造方法。   The surface of the molten metal in the plating bath is sealed with a non-oxidizing gas, the amount of plating adhesion is adjusted by wiping means installed in the gas seal portion, and the molten metal on the surface of the plating bath in the gas seal portion is further removed. Molten metal plated steel for cleaning the surface of the molten metal plating bath by circulating the molten metal by a molten metal circulation means having a suction port for sucking together with the oxidizing gas and a discharge port for discharging the sucked molten metal to the outside of the gas seal portion A method for producing a wire, wherein 50-80% of the entire cross-sectional area of the suction port of the molten metal circulating means is immersed in the molten metal, and the molten metal and the non-oxidizing gas are sucked simultaneously. Wire manufacturing method. ワイピング手段によって、めっき付着量150g/m2以上に調整することを特徴とする請求項1に記載の溶融金属めっき鋼線の製造方法。 The method for producing a hot-dip galvanized steel wire according to claim 1, wherein the amount of plating adhesion is adjusted to 150 g / m 2 or more by wiping means. 複数本のめっき線を同時に通線することを特徴とする請求項1又は2に記載の溶融金属めっき鋼線の製造方法。   The method for producing a hot-dip galvanized steel wire according to claim 1, wherein a plurality of plated wires are simultaneously passed. 溶融めっき鋼線をガスシール部外に引き出す出口部の大気開放断面積が、該溶融金属めっき鋼線の断面積の20倍以上、50倍以下であることを特徴とする請求項1〜3の何れか1項に記載の溶融金属めっき鋼線の製造方法。   The cross-sectional area of the outlet portion where the hot-dip plated steel wire is drawn out of the gas seal portion is 20 times or more and 50 times or less the cross-sectional area of the hot-dip metal-plated steel wire. The manufacturing method of the hot-dip metal plating steel wire of any one of Claims 1. 非酸化性ガスを450℃以上に加熱して、ガスシール部に導入することを特徴とする請求項1〜4の何れか1項に記載の溶融金属めっき鋼線の製造方法。   The method for producing a molten metal-plated steel wire according to any one of claims 1 to 4, wherein the non-oxidizing gas is heated to 450 ° C or higher and introduced into the gas seal portion. 溶融金属循環手段が吸引した溶融金属を、溶融金属放出制御手段によって、該溶融金属の放出方向及び放出速度を制御してガスシール部外に放出し、溶融金属めっき浴の最高温度と最低温度との差を5℃以内にすることを特徴とする請求項1〜5の何れか1項に記載の溶融金属めっき鋼線の製造方法。   The molten metal sucked by the molten metal circulation means is discharged out of the gas seal portion by controlling the discharge direction and the discharge speed of the molten metal by the molten metal release control means, and the maximum and minimum temperatures of the molten metal plating bath The method for producing a hot-dip galvanized steel wire according to any one of claims 1 to 5, wherein the difference is within 5 ° C. めっき浴の溶融金属の表面を非酸化性ガスでシールするガスシール部と、該ガスシール部内に設置されためっき付着量を調整するワイピング手段と、更に、該ガスシール部内のめっき浴表層の溶融金属を前記非酸化性ガスとともに吸引する吸引口及び吸引した溶融金属を前記ガスシール部外に放出する排出口を有する溶融金属循環手段とからなることを特徴とする溶融金属めっき鋼線の製造装置。   A gas seal portion that seals the surface of the molten metal in the plating bath with a non-oxidizing gas, a wiping means that adjusts the amount of plating deposited in the gas seal portion, and further melting the plating bath surface layer in the gas seal portion An apparatus for producing a molten metal-plated steel wire, comprising: a suction port for sucking metal together with the non-oxidizing gas; and a molten metal circulation means having a discharge port for discharging the sucked molten metal to the outside of the gas seal portion. . 更に、非酸化性ガスを加熱し、ガスシール部に導入するガス加熱導入手段を設けたことを特徴とする請求項7に記載の溶融金属めっき鋼線の製造装置。   The apparatus for producing a hot-dip galvanized steel wire according to claim 7, further comprising gas heating introduction means for heating the non-oxidizing gas and introducing it into the gas seal portion. 前記溶融金属循環手段が、放出する溶融金属の放出方向及び放出速度を調整する溶融金属放出制御手段を有することを特徴とする請求項7又は8に記載の溶融金属めっき鋼線の製造装置。   9. The apparatus for producing a molten metal plated steel wire according to claim 7, wherein the molten metal circulating means has a molten metal release control means for adjusting a discharge direction and a discharge speed of the molten metal to be discharged. 前記溶融金属循環手段と、前記ガスシール部と、前記ワイピング手段とが一体に構成され、上下左右に移動可能な機構を有することを特徴とする請求項7〜9の何れか1項に記載の溶融金属めっき鋼線の製造装置。   The said molten metal circulation means, the said gas seal part, and the said wiping means are comprised integrally, and it has a mechanism which can move up and down, right and left, The any one of Claims 7-9 characterized by the above-mentioned. Manufacturing equipment for molten metal plated steel wire. 前記ワイピング手段が電磁ワイピング装置であることを特徴とする請求項7〜10の何れか1項に記載の溶融金属めっき鋼線の製造装置。   The said wiping means is an electromagnetic wiping apparatus, The manufacturing apparatus of the hot-dip metal-plated steel wire of any one of Claims 7-10 characterized by the above-mentioned.
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Cited By (5)

* Cited by examiner, † Cited by third party
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JP2014031578A (en) * 2012-08-01 2014-02-20 Union Steel Co Ltd Method for manufacturing zinc-aluminum based alloy plating steel plate excellent in workability and corrosion resistance, and device therefor
US9863029B2 (en) 2012-08-01 2018-01-09 Dongkuk Steel Mill Co., Ltd. Apparatus for forming nitrogen cloud to produce hot dip coated steel sheet
DE112016006868T5 (en) 2016-05-17 2019-03-07 Dongkuk Steel Mill Co., Ltd. An apparatus for forming a nitrogen cloud for producing a melt-coated steel sheet excellent in surface quality and a method of producing a zinc-aluminum hot dip coated steel sheet using the same
KR20190074628A (en) * 2017-12-20 2019-06-28 주식회사 포스코 Apparatus for stablizing wire and apparatus for hot dipping including having same
CN110184554A (en) * 2019-05-30 2019-08-30 江苏景源泓科技有限公司 A kind of open type steel-wire galvanizing without nitrogen protection is smeared with electromagnetism wipes device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014031578A (en) * 2012-08-01 2014-02-20 Union Steel Co Ltd Method for manufacturing zinc-aluminum based alloy plating steel plate excellent in workability and corrosion resistance, and device therefor
JP2016027210A (en) * 2012-08-01 2016-02-18 ユニオン スティール カンパニーリミテッド Nitrogen gas curtain forming apparatus
US9863029B2 (en) 2012-08-01 2018-01-09 Dongkuk Steel Mill Co., Ltd. Apparatus for forming nitrogen cloud to produce hot dip coated steel sheet
DE112016006868T5 (en) 2016-05-17 2019-03-07 Dongkuk Steel Mill Co., Ltd. An apparatus for forming a nitrogen cloud for producing a melt-coated steel sheet excellent in surface quality and a method of producing a zinc-aluminum hot dip coated steel sheet using the same
DE112016006868B4 (en) 2016-05-17 2022-10-20 Dongkuk Steel Mill Co., Ltd. A nitrogen cloud forming apparatus for producing a hot-dip coated steel sheet having excellent surface quality and a method of producing a zinc-aluminum hot-dip coated steel sheet using the same
KR20190074628A (en) * 2017-12-20 2019-06-28 주식회사 포스코 Apparatus for stablizing wire and apparatus for hot dipping including having same
KR101998996B1 (en) * 2017-12-20 2019-07-10 주식회사 포스코 Apparatus for stablizing wire and apparatus for hot dipping including having same
CN110184554A (en) * 2019-05-30 2019-08-30 江苏景源泓科技有限公司 A kind of open type steel-wire galvanizing without nitrogen protection is smeared with electromagnetism wipes device
CN110184554B (en) * 2019-05-30 2023-12-22 河北鑫鹏通信设备有限公司 Electromagnetic wiping device for hot galvanizing of open steel wire without nitrogen protection

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