JP3004879B2 - Temperature control method of steel strip entering galvanizing bath - Google Patents
Temperature control method of steel strip entering galvanizing bathInfo
- Publication number
- JP3004879B2 JP3004879B2 JP6233191A JP23319194A JP3004879B2 JP 3004879 B2 JP3004879 B2 JP 3004879B2 JP 6233191 A JP6233191 A JP 6233191A JP 23319194 A JP23319194 A JP 23319194A JP 3004879 B2 JP3004879 B2 JP 3004879B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- temperature
- hot
- dip galvanizing
- galvanizing bath
- 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.)
- Expired - Fee Related
Links
Landscapes
- Coating With Molten Metal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融亜鉛めっき鋼板の
製造方法に関し、詳しくは、連続溶融亜鉛めっき装置に
おいて溶融亜鉛めっき浴へ侵入する鋼帯の温度を制御す
る方法に関する。The present invention relates to a method for producing a hot-dip galvanized steel sheet, and more particularly to a method for controlling the temperature of a steel strip entering a hot-dip galvanizing bath in a continuous hot-dip galvanizing apparatus.
【０００２】[0002]
【従来の技術】一般に、鋼帯の連続溶融亜鉛めっき装置
では、図４に示すように、連続的に焼鈍された鋼帯１
は、３５０〜６００℃の温度になるように冷却帯７で冷
却された後、亜鉛ポット１４に侵入して浸漬、めっきさ
れ、溶融亜鉛めっき浴１５から出た鋼帯１は気体絞り装
置５でめっき付着量を調整され、最終的に合金化炉１９
で合金化処理される。ところで、上記溶融亜鉛めっき浴
１５への鋼帯１の侵入時温度は、めっき品質を支配する
重要な因子の一つであり、該侵入鋼帯の温度は溶融亜鉛
めっき浴１５の温度と同程度であることが好ましいと言
われている。2. Description of the Related Art Generally, in a continuous hot-dip galvanizing apparatus for steel strip, as shown in FIG.
Is cooled in the cooling zone 7 to a temperature of 350 to 600 ° C., then penetrated into the zinc pot 14, immersed and plated, and the steel strip 1 coming out of the hot-dip galvanizing bath 15 is cooled by the gas expansion device 5. The amount of plating is adjusted, and finally the
Is alloyed. Incidentally, the temperature at which the steel strip 1 enters the hot-dip galvanizing bath 15 is one of the important factors that govern the plating quality. Is said to be preferable.
【０００３】しかしながら、従来の連続溶融亜鉛めっき
装置では、溶融亜鉛めっき浴１５へ侵入する鋼帯１の表
面が酸化されるのを防止するため、該溶融亜鉛めっき浴
１５の直上にスナウト６という所謂大気を遮断し、その
内部を還元雰囲気（水素、窒素ガス等で）にできる筒状
体を設けたものが多い。そのため、スナウト６内で鋼帯
１の温度が低下し、めっき品質が劣化したり、ドロスが
発生するという問題がある。また近年、通板性の向上を
目的として、上記スナウト６前のターンダウンロール３
の回転速度を自動制御する傾向があり、これにより該溶
融亜鉛めっき浴１５に侵入する直前の鋼帯温度の設定が
難しい状況となっている。特に、鋼帯１のサイズが種々
変更される場合には、鋼帯１の各ロール２、３との接触
範囲が変わるため、板幅方向での温度分布が不均一にな
りやすいという問題もある。However, in the conventional continuous hot-dip galvanizing apparatus, in order to prevent the surface of the steel strip 1 that enters the hot-dip galvanizing bath 15 from being oxidized, a so-called snout 6 directly above the hot-dip galvanizing bath 15 is used. In many cases, a cylindrical body is provided which shuts off the atmosphere and makes the inside thereof a reducing atmosphere (hydrogen, nitrogen gas or the like). For this reason, there is a problem that the temperature of the steel strip 1 decreases in the snout 6, and the plating quality deteriorates and dross occurs. In recent years, the turndown roll 3 before the snout 6 has been used for the purpose of improving the sheet passing property.
Tends to be automatically controlled, which makes it difficult to set the temperature of the steel strip immediately before entering the hot-dip galvanizing bath 15. In particular, when the size of the steel strip 1 is variously changed, the contact range between the steel strip 1 and each of the rolls 2 and 3 is changed, so that there is also a problem that the temperature distribution in the sheet width direction tends to be uneven. .
【０００４】そこで、従来より対策が数多く検討され、
例えば特開平４−３２９８５６号公報に開示されたよう
に、スナウト内に鋼帯の加熱装置を設置し、溶融亜鉛め
っき浴侵入直前の微妙な鋼帯温度の変化に対応して、該
鋼帯温度を制御する方法が提案されている。また、特開
平６−１０８２１４号公報は、溶融亜鉛めっき浴の温度
を制御するために、侵入鋼帯の温度を調整する方法を開
示している。Therefore, many countermeasures have been studied conventionally.
For example, as disclosed in Japanese Patent Application Laid-Open No. 4-329856, a steel strip heating device is installed in a snout, and in response to a subtle change in the steel strip temperature immediately before entering the hot-dip galvanizing bath, the steel strip temperature is changed. Have been proposed. JP-A-6-108214 discloses a method of adjusting the temperature of an intruding steel strip in order to control the temperature of a hot-dip galvanizing bath.
【０００５】しかしながら、前記特開平４−３２９８５
６号公報記載の技術では、加熱装置とその制御手段が必
要で、新たに設備費がかかり、そのランニングコストも
ぼう大になるという問題があった。また、実際に試用し
た結果、スナウト内の局所的な浴温変動を防止すること
はできなかった。さらに、特開平６−１０８２１４号公
報記載の技術は、溶融亜鉛めっき浴の温度を一定の範囲
内に抑える点では有効であったが、そのための手段とし
て鋼帯の温度を変更させるため、鋼帯温度と溶融亜鉛め
っき浴の温度との差がかえって開いてしまうという欠点
があり、実用し難い。[0005] However, Japanese Patent Application Laid-Open No. 4-32985 / 1992 discloses
The technique described in Japanese Patent Application Laid-Open No. 6-26095 has a problem that a heating device and a control means for the heating device are required, and equipment costs are newly added, and the running cost is also increased. In addition, as a result of actual trial, it was not possible to prevent local bath temperature fluctuation in the snout. Further, the technique described in Japanese Patent Application Laid-Open No. 6-108214 has been effective in that the temperature of the hot-dip galvanizing bath is kept within a certain range. There is a drawback that the difference between the temperature and the temperature of the hot-dip galvanizing bath is rather large, and it is difficult to put into practical use.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、かかる事情
を鑑み、鋼帯に連続溶融亜鉛めっきを施すに際して、該
鋼帯の長手、板幅両方向で板温を均一に保ち、且つスナ
ウト内でドロス発生が発生しない、設備費が安価でラン
ニングコストのかからないめっき用鋼帯の温度制御方法
を提案することを目的としている。SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a steel strip which is subjected to continuous hot-dip galvanizing to maintain a uniform sheet temperature in both the longitudinal direction and the sheet width direction of the steel strip and to maintain the temperature within the snout. An object of the present invention is to propose a method of controlling the temperature of a steel strip for plating that does not generate dross, has low equipment costs, and does not require running costs.
【０００７】[0007]
【課題を解決するための手段】発明者は、上記目的を達
成するため、焼鈍炉の冷却帯以降でのロール接触、ある
いは炉内雰囲気への抜熱などによる鋼帯の冷却に着眼
し、本発明を創案した。すなわち、本発明は、焼鈍され
た被めっき鋼帯が、焼鈍炉の冷却帯で冷却された後、ス
ナウト内を通過して溶融亜鉛めっき浴中に浸漬される鋼
帯の連続溶融亜鉛めっき方法において、上記鋼帯が冷却
帯を通過し溶融亜鉛めっき浴に至るまでの間に、該冷却
帯出口での鋼帯温度、ハースロール及びターンダウンロ
ールのロール表面温度、焼鈍炉内の雰囲気温度、鋼帯幅
方向の温度分布及び該溶融亜鉛めっき浴の温度を測定
し、該測定値に基づき鋼帯からの拔熱量を演算し、上記
スナウト内の鋼帯温度と該溶融亜鉛めっき浴温度との偏
差を小さくするように、冷却帯での送気ファンの出力及
びダンパ開度を制御することを特徴する溶融亜鉛めっき
浴への侵入鋼帯の温度制御方法である。また、本発明
は、上記冷却帯での鋼帯幅方向に３つ以上設けたダンパ
の開度を調整することを特徴とする請求項１記載の溶融
亜鉛めっき浴への侵入鋼帯の温度制御方法である。Means for Solving the Problems In order to achieve the above object, the present inventor focused on the cooling of the steel strip by contacting rolls after the cooling zone of the annealing furnace or by removing heat to the atmosphere in the furnace. Invented the invention. That is, the present invention relates to a continuous hot-dip galvanizing method for a steel strip in which the annealed steel strip is cooled in a cooling zone of an annealing furnace and then passed through a snout and immersed in a hot-dip galvanizing bath. Between the steel strip passing through the cooling zone and the hot dip galvanizing bath, the temperature of the steel strip at the outlet of the cooling zone, hearth roll and turndown roll.
The roll surface temperature of the steel strip, the ambient temperature in the annealing furnace, the temperature distribution in the steel strip width direction and the temperature of the hot-dip galvanizing bath were measured, and the amount of heat drawn from the steel strip was calculated based on the measured values. Controlling the output of the air supply fan and the opening degree of the damper in the cooling zone so as to reduce the deviation between the temperature of the steel strip in the hot-dip galvanizing bath and the temperature of the hot-dip galvanizing bath. Temperature control method. The temperature control of the steel strip entering the hot-dip galvanizing bath according to claim 1, wherein the opening degree of three or more dampers provided in the steel strip width direction in the cooling zone is adjusted. Is the way.
【０００８】[0008]
【作用】本発明では、焼鈍された被めっき鋼帯が、焼鈍
炉の冷却帯で冷却された後、スナウト内を通過して溶融
亜鉛めっき浴中に浸漬される鋼帯の連続溶融亜鉛めっき
方法において、上記鋼帯が冷却帯を通過し溶融亜鉛めっ
き浴に至るまでの間に、該冷却帯出口での鋼帯温度、ハ
−スロール及びターンダウンロールのロール表面温度、
焼鈍炉内の雰囲気温度、鋼帯幅方向の温度分布及び該溶
融亜鉛めっき浴の温度を測定し、該測定値に基づき鋼帯
からの拔熱量を演算し、上記スナウト内の鋼帯温度と該
溶融亜鉛めっき浴温度との偏差を小さくするように、冷
却帯での送気ファンの出力及びダンパ開度を制御するよ
うにしたので、溶融亜鉛めっき浴侵入時の鋼帯温度と溶
融亜鉛めっき浴の温度との偏差が適切に制御されるよう
になり、めっき品質の劣化を防止すると共に、スナウト
内の局所的な溶融亜鉛めっき浴温度の変動を防止し、ド
ロス発生の防止とめっき欠陥の発生が防止できるように
なる。また、本発明では、上記冷却帯での鋼帯幅方向に
３つ以上設けたダンパの開度を調整するようにしたの
で、溶融亜鉛めっき浴への侵入時の鋼帯温度が、鋼帯の
幅方向で均一になり、上記効果が一層促進される。According to the present invention, a continuous hot-dip galvanizing method for a steel strip, in which an annealed steel strip is cooled in a cooling zone of an annealing furnace, then passed through a snout and immersed in a hot-dip galvanizing bath. in, until the steel strip reaches a passes through the cooling zone galvanizing bath, the steel strip temperature at the cooling zone outlet, c
-Roll surface temperature of the sroll and turndown rolls ,
The ambient temperature in the annealing furnace, the temperature distribution in the width direction of the steel strip and the temperature of the hot-dip galvanizing bath were measured, and the amount of heat removed from the steel strip was calculated based on the measured values. The output of the air supply fan and the opening of the damper in the cooling zone are controlled so as to reduce the deviation from the hot dip galvanizing bath temperature. The deviation from the temperature is controlled appropriately, preventing the deterioration of plating quality and preventing the local fluctuation of hot-dip galvanizing bath temperature in the snout, preventing dross generation and generating plating defects. Can be prevented. Further, in the present invention, since the opening degree of the three or more dampers provided in the steel strip width direction in the cooling zone is adjusted, the steel strip temperature at the time of entering the hot dip galvanizing bath is reduced. It becomes uniform in the width direction, and the above effect is further promoted.
【０００９】なお、ダンパの設置箇所を３つ以上とした
のは、それより少ないと幅方向の鋼帯温度が均一にでき
ないためである。以下、実施例において、図１〜３に基
づき、本発明の内容を具体的に説明する。The reason why the number of the dampers is three or more is that if the number is less than three, the steel strip temperature in the width direction cannot be made uniform. Hereinafter, the contents of the present invention will be described in detail with reference to FIGS.
【００１０】[0010]
【実施例】図１は、本発明に係る溶融亜鉛めっき浴１５
への侵入鋼帯の温度制御方法を実施した装置の１例であ
る。鋼帯１は、焼鈍炉の冷却帯７を経て、ハースロール
２、ターンダウンロール３で引かれ、スナウト６中を通
過して亜鉛ポット１４に保持された溶融亜鉛めっき浴１
５に侵入する。そして、該鋼帯１は、めっきを施されシ
ンクロール４で反転して溶融亜鉛めっき浴の外に抜け、
気体絞り装置５でめっき付着量を適量に調整される。本
発明では、上記装置に、冷却帯出口での鋼帯温度計（プ
ロフィール温度計含む）８及びスナウト内温度計１３、
ロール温度計（プロフィール温度計含む）、すなわちハ
ースロール温度計９、ターンダウンロール温度計１２、
焼鈍炉内雰囲気の温度計１０、１１が設けられている。
そのため、冷却帯７から溶融亜鉛めっき浴１５までの間
を進行する間に、鋼帯１は、鋼帯温度計８、１３、ロー
ル温度計９、１２、焼鈍炉内雰囲気温度計１０、１１等
の各測定値に基づき、送気ファン１６出力や気体搬送ダ
クト２１に設けたダンパ１７の開度が調整可能となるの
である。特に、請求項２の本発明の実施には、冷却帯７
は、図２（ａ）〜（ｂ）に示すように、鋼帯幅方向に３
個以上のスリットを設け、ダンパ１７開度の調整による
鋼帯幅方向での冷却能力を高めている。ここでは、送気
したガスは水冷したＨＮガスである。FIG. 1 shows a hot-dip galvanizing bath 15 according to the present invention.
1 is an example of an apparatus that implements a method of controlling the temperature of a steel strip invading steel. The steel strip 1 passes through a cooling zone 7 of an annealing furnace, is drawn by a hearth roll 2 and a turndown roll 3, passes through a snout 6, and is held in a zinc pot 14 by a hot-dip galvanizing bath 1.
Invade 5 Then, the steel strip 1 is plated, inverted by the sink roll 4 and pulled out of the hot-dip galvanizing bath.
The plating amount is adjusted to an appropriate amount by the gas throttle device 5. In the present invention, a steel strip thermometer (including a profile thermometer) 8 at the outlet of the cooling zone and a thermometer 13 in the snout 13
Roll thermometer (including profile thermometer), ie, hearth roll thermometer 9, turndown roll thermometer 12,
Thermometers 10 and 11 for the atmosphere in the annealing furnace are provided.
Therefore, while proceeding from the cooling zone 7 to the hot-dip galvanizing bath 15, the steel strip 1 is provided with steel strip thermometers 8 and 13, roll thermometers 9 and 12, and atmosphere thermometers 10 and 11 in an annealing furnace. The output of the air supply fan 16 and the degree of opening of the damper 17 provided in the gas conveying duct 21 can be adjusted based on the measured values of the above. In particular, in the implementation of the present invention of claim 2, the cooling zone 7
As shown in FIGS. 2 (a) and 2 (b), 3
More than one slit is provided to increase the cooling capacity in the steel strip width direction by adjusting the opening of the damper 17. Here, the gas sent is water-cooled HN gas.
【００１１】なお、図２（ａ）は冷却帯の斜視図であ
り、気体搬送ダクト２１にダンパ１７を設置してある様
子（ファンは図示せず）を示しており、図２（ｂ）は冷
却帯の内部で鋼帯１と対向する面にスリット２０を設け
たことを示している。図３は、本発明の具体的な制御フ
ロー例を示すものである。オンラインコンピュータによ
る鋼帯情報（鋼種、サイズ等）及びプロセスコンピュー
タからの操業実績（ラインスピード等）と、上記各温度
計の測定値を鋼帯温度制御モデルに入力し、調整すべき
冷却帯の送気ファン出力と鋼帯幅方向に設けた各ダンパ
１７の開度を計算し、鋼帯１のサイズ鋼種等の変更点で
プリセットされる。さらに、鋼帯温度計８、１３による
侵入鋼帯の温度測定値を用い、フィードバック制御が加
えられる。FIG. 2A is a perspective view of the cooling zone, showing a state in which a damper 17 is installed in the gas conveying duct 21 (the fan is not shown), and FIG. This shows that a slit 20 is provided on the surface facing the steel strip 1 inside the cooling zone. FIG. 3 shows a specific control flow example of the present invention. The steel strip information (steel type, size, etc.) from the online computer, the operation results (line speed, etc.) from the process computer, and the measured values of each of the above thermometers are input to the steel strip temperature control model and the cooling zone to be adjusted is sent The output of the air fan and the opening of each damper 17 provided in the steel strip width direction are calculated, and are preset at a change point such as the size steel type of the steel strip 1. Further, feedback control is added using the measured values of the intruded steel strip by the steel strip thermometers 8 and 13.
【００１２】なお、図３の鋼帯温度制御モデルは、前記
ロールへの接触及び炉内雰囲気への拔熱量を配慮したも
のであり、例えば、下記のような関数式で表わされる。 ＴSRC ＝ａ1 ×ＴSPOT ＋ ａ2 ×ＴGHR ＋ａ3 ×Ｔ
GTD − ａ4 ×ＬＳ×Ｄ＋ａ5 ここで、 ＴSRC ： 冷却帯出側の板温 ＴSPOT ： ポット侵入板温 ＴGHR ： ハースロール温度 ＴGTD ： タ−ンダウンロール温度 ＬＳ ： ライン速度 Ｄ ： 板厚 ａ1 〜ａ5 ： 定数 さらに、本実施例では、送気ガスを用いて鋼帯を冷却す
る場合について述べたが、鋼帯の温度によっては加熱す
ることもある。そのような場合には、送気ガスを加熱す
ることだけで、本発明が適用できることを申し添えてお
きます。The steel strip temperature control model shown in FIG. 3 takes into account the contact with the roll and the amount of heat drawn into the furnace atmosphere, and is expressed by, for example, the following functional equation. T SRC = a 1 × T SPOT + a 2 × T GHR + a 3 × T
GTD −a 4 × LS × D + a 5 where, T SRC : Plate temperature at the side of cooling zone T SPOT : Plate penetration plate temperature T GHR : Hearth roll temperature T GTD : Turn down roll temperature LS: Line speed D: Plate the thickness a 1 ~a 5: constant Furthermore, in the present embodiment has dealt with the case of cooling the steel strip by using the insufflation gas, also be heated by the temperature of the steel strip. In such a case, it should be noted that the present invention can be applied only by heating the supply gas.
【００１３】[0013]
【発明の効果】以上述べたように、本発明により、
（１）操業条件（鋼種サイズ、ライスピード等）の変化
点においても侵入鋼帯の温度を均一に保ち、（２）冷却
帯ダンパの開度調整で鋼帯幅方向についても鋼帯温度を
均一に保つことが可能となり、スナウト内での局所的な
溶融亜鉛めっき浴温度の変動を防止し、ドロス発生も防
止できた。その結果、ドロスと鋼帯の接触によるめっき
不良やスリ疵を防止できるようになった。また、侵入鋼
帯温度、特に幅方向温度分布の均一化がはかられたこと
により、合金化処理も鋼帯幅方向で均一化され、めっき
品質の向上が達成できた。As described above, according to the present invention,
(1) Keep the temperature of the intruded steel strip uniform even at the changing point of the operating conditions (steel type size, rye speed, etc.) , And the local fluctuation of the hot-dip galvanizing bath temperature in the snout was prevented, and dross generation was also prevented. As a result, it has become possible to prevent plating defects and flaws due to contact between the dross and the steel strip. In addition, since the intrusion steel strip temperature, particularly the temperature distribution in the width direction was made uniform, the alloying treatment was also made uniform in the width direction of the steel strip, and the plating quality was improved.
【図１】本発明に係る溶融亜鉛めっき浴への侵入鋼帯の
温度制御方法を実施した装置の縦断面図である。FIG. 1 is a longitudinal sectional view of an apparatus that implements a method for controlling the temperature of a steel strip entering a hot dip galvanizing bath according to the present invention.
【図２】（ａ）は冷却帯の斜視図であり、（ｂ）は本発
明に係る溶融亜鉛めっき浴への侵入鋼帯の温度制御方法
を実施した冷却帯のスリット構造を示す図である。FIG. 2A is a perspective view of a cooling zone, and FIG. 2B is a diagram illustrating a slit structure of the cooling zone in which the method for controlling the temperature of a steel strip entering a hot dip galvanizing bath according to the present invention is performed. .
【図３】本発明に係る溶融亜鉛めっき浴への侵入鋼帯の
温度制御方法を実施するための具体的なフロー図であ
る。FIG. 3 is a specific flow chart for implementing the method for controlling the temperature of a steel strip entering a hot dip galvanizing bath according to the present invention.
【図４】一般的な連続溶融亜鉛めっき装置の縦断面図で
ある。FIG. 4 is a longitudinal sectional view of a general continuous hot-dip galvanizing apparatus.
１ 鋼帯 ２ ハースロール ３ ターンダウンロール ４ シンクロール ５ 気体絞り装置 ６ スナウト ７ 冷却帯 ８ 冷却帯出口での鋼帯温度計 ９ ハースロール温度計 １０ 焼鈍炉内雰囲気温度計 １１ 焼鈍炉内雰囲気温度計 １２ ターンダウンロール温度計 １３ スナウト内の鋼帯温度計 １４ 亜鉛ポット １５ 溶融亜鉛めっき浴 １６ 送気ファン １７ ダンパ １８ 溶融亜鉛めっき浴温度計 １９ 合金化炉 ２０ 冷却帯スリット ２１ 送気ダクト ２２ 気体 DESCRIPTION OF SYMBOLS 1 Steel strip 2 Hearth roll 3 Turndown roll 4 Sink roll 5 Gas squeezing device 6 Snout 7 Cooling zone 8 Steel strip thermometer at cooling zone outlet 9 Hearth roll thermometer 10 Atmosphere thermometer in annealing furnace 11 Atmospheric temperature in annealing furnace Total 12 Turndown roll thermometer 13 Steel strip thermometer in snout 14 Zinc pot 15 Hot-dip galvanizing bath 16 Air supply fan 17 Damper 18 Hot-dip galvanizing bath thermometer 19 Alloying furnace 20 Cooling zone slit 21 Air duct 22 Gas
Claims (2)
却帯で冷却された後、スナウト内を通過して溶融亜鉛め
っき浴中に浸漬される鋼帯の連続溶融亜鉛めっき方法に
おいて、 上記鋼帯が冷却帯を通過し溶融亜鉛めっき浴に至るまで
の間に、該冷却帯出口での鋼帯温度、ハースロール及び
ターンダウンロールのロール表面温度、焼鈍炉内の雰囲
気温度、鋼帯幅方向の温度分布及び該溶融亜鉛めっき浴
の温度を測定し、該測定値に基づき鋼帯からの拔熱量を
演算し、上記スナウト内の鋼帯温度と該溶融亜鉛めっき
浴温度との偏差を小さくするように、冷却帯での送気フ
ァンの出力及びダンパ開度を制御することを特徴する溶
融亜鉛めっき浴への侵入鋼帯の温度制御方法。1. A continuous hot-dip galvanizing method for a steel strip in which an annealed steel strip is cooled in a cooling zone of an annealing furnace and then passed through a snout and immersed in a hot-dip galvanizing bath. While the steel strip passes through the cooling zone and reaches the hot-dip galvanizing bath, the steel strip temperature at the cooling zone outlet, hearth roll and
The roll surface temperature of the turn-down roll , the ambient temperature in the annealing furnace, the temperature distribution in the steel strip width direction and the temperature of the hot-dip galvanizing bath were measured, and the heat removal from the steel strip was calculated based on the measured values. A steel intruding into a hot dip galvanizing bath characterized by controlling the output of an air supply fan and a damper opening in a cooling zone so as to reduce the deviation between the steel strip temperature in the snout and the hot dip galvanizing bath temperature. How to control the temperature of the belt.
設けたダンパの開度を調整することを特徴とする請求項
１記載の溶融亜鉛めっき浴への侵入鋼帯の温度制御方
法。2. The temperature control of a steel strip entering a hot-dip galvanizing bath according to claim 1, wherein the degree of opening of three or more dampers provided in the width direction of the steel strip in the cooling zone is adjusted. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6233191A JP3004879B2 (en) | 1994-09-28 | 1994-09-28 | Temperature control method of steel strip entering galvanizing bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6233191A JP3004879B2 (en) | 1994-09-28 | 1994-09-28 | Temperature control method of steel strip entering galvanizing bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0892712A JPH0892712A (en) | 1996-04-09 |
| JP3004879B2 true JP3004879B2 (en) | 2000-01-31 |
Family
ID=16951176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6233191A Expired - Fee Related JP3004879B2 (en) | 1994-09-28 | 1994-09-28 | Temperature control method of steel strip entering galvanizing bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3004879B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102042511B1 (en) * | 2018-02-28 | 2019-11-27 | 춘해보건대학교 산학협력단 | Apparatus for ophthalmology inspection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4507681B2 (en) * | 2003-06-19 | 2010-07-21 | Ｊｆｅスチール株式会社 | Temperature control method for plating bath for hot dip galvanized steel sheet |
| JP4980273B2 (en) * | 2008-03-13 | 2012-07-18 | 新日本製鐵株式会社 | Temperature control method and alloying furnace for alloying furnace for producing galvannealed steel sheet |
| JP6354069B2 (en) * | 2015-06-11 | 2018-07-11 | Ｊｆｅスチール株式会社 | Manufacturing method of molten metal plated steel strip and production line of molten metal plated steel strip |
| CN110295338B (en) * | 2019-07-18 | 2021-11-09 | 唐山钢铁集团高强汽车板有限公司 | Control method for stabilizing temperature of strip steel entering zinc pot |
| CN114756065B (en) * | 2021-01-11 | 2023-08-15 | 宝钢日铁汽车板有限公司 | Plate temperature control method for hot dip galvanized strip steel before entering zinc pot |
-
1994
- 1994-09-28 JP JP6233191A patent/JP3004879B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102042511B1 (en) * | 2018-02-28 | 2019-11-27 | 춘해보건대학교 산학협력단 | Apparatus for ophthalmology inspection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0892712A (en) | 1996-04-09 |
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