JP2003277834A - Cooling method, and cooling equipment - Google Patents
Cooling method, and cooling equipmentInfo
- Publication number
- JP2003277834A JP2003277834A JP2002081453A JP2002081453A JP2003277834A JP 2003277834 A JP2003277834 A JP 2003277834A JP 2002081453 A JP2002081453 A JP 2002081453A JP 2002081453 A JP2002081453 A JP 2002081453A JP 2003277834 A JP2003277834 A JP 2003277834A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- metal strip
- temperature
- mist
- gas jet
- 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.)
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Links
Landscapes
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属ストリップを
連続熱処理した後の冷却を行う冷却帯での冷却方法およ
び設備に関する。TECHNICAL FIELD The present invention relates to a cooling method and equipment in a cooling zone for cooling a metal strip after continuous heat treatment.
【０００２】[0002]
【従来の技術】熱処理後の金属ストリップを冷却する方
式として、従来から、ガスジェット冷却方式と、ミスト
冷却方式が知られている。ガスジェット冷却方式は、空
気や、必要に応じて不活性ガス等のガスをジェット噴射
して金属ストリップ表面に吹き付けて冷却を行うもので
ある。本方式は、幅広い温度の金属ストリップの冷却に
適用されるが、冷却効率が低く、冷却帯の長さが長くな
るという問題がある。2. Description of the Related Art As a method for cooling a metal strip after heat treatment, a gas jet cooling method and a mist cooling method have been conventionally known. The gas jet cooling method is a method of jetting air or a gas such as an inert gas, if necessary, and spraying the gas onto the surface of the metal strip for cooling. This method is applicable to cooling metal strips in a wide range of temperatures, but has a problem of low cooling efficiency and a long cooling zone.
【０００３】一方、ミスト冷却方式は、金属ストリップ
表面に霧状にした水を吹き付けて冷却するものであり、
フォグ冷却方式とも呼ばれる。なお、ミストの吹き付け
方式としては、スプレーノズルの形状を工夫してミスト
化する方式と、空気等のガスと混合してミスト化する方
式等があり、後者の方がミスト径を小さくすることがで
きる。On the other hand, the mist cooling system is a method in which atomized water is sprayed on the surface of a metal strip to cool it.
Also called fog cooling method. In addition, as a mist spraying method, there are a method of forming a mist by devising the shape of a spray nozzle, a method of forming a mist by mixing with a gas such as air, and the like, and the latter can reduce the mist diameter. it can.
【０００４】ところで、水をミスト化して冷却する際に
は、金属ストリップ温度が200 ℃〜350 ℃の遷移沸騰域
となる領域を避ける必要があることが知られている（特
開昭63-227726 号公報、特開平4-304323号公報等参
照）。上記の遷移沸騰域では、金属ストリップ表面に水
滴が入り混じった不安定な水蒸気層が形成され、図２に
示すように、極めて不均一な冷却となる。図２は、所定
幅の鋼板をミスト冷却した時に、鋼板の幅方向に生じる
温度差を示すものであり、鋼板温度が 200〜350 ℃の領
域でミスト冷却を行うと幅方向で温度差が大きくなるこ
とがわかる。この不均一は、ミスト冷却時の水分密度を
小さくすることで改善されるが、完全には抑えることは
できなかった。特に、金属ストリップの板厚が薄い場合
には、その板形状品質を良好に保つことが困難であっ
た。By the way, it is known that, when water is misted and cooled, it is necessary to avoid a region where the metal strip temperature is in the transition boiling region of 200 ° C. to 350 ° C. (Japanese Patent Laid-Open No. 63-227726). Japanese Patent Laid-Open No. 4-304323, etc.). In the above transition boiling region, an unstable water vapor layer in which water droplets are mixed is formed on the surface of the metal strip, resulting in extremely uneven cooling, as shown in FIG. Fig. 2 shows the temperature difference that occurs in the width direction of the steel plate when the steel plate with a predetermined width is mist cooled. If mist cooling is performed in the region where the steel plate temperature is 200 to 350 ° C, the temperature difference in the width direction is large. You can see. This non-uniformity was improved by reducing the water density during mist cooling, but could not be completely suppressed. In particular, when the plate thickness of the metal strip is thin, it is difficult to keep the plate shape quality good.
【０００５】そのため、従来の熱処理後の金属ストリッ
プの冷却では、図３に示す以下の各方式がとられてき
た。
(1) 冷却帯10として、金属ストリップ１を冷却する所要
数のガスジェット冷却装置２を連設して用いる（図３
（ａ））。ただし、ガスジェット冷却装置は冷却効率が
低いため、必然的に冷却帯長が長くなる。
(2) 冷却帯10として、遷移沸騰域上限温度（350 ℃）以
上の領域に所要数のミスト冷却装置３を連設して用いる
（図３（ｂ））。なお、遷移沸騰域下限温度（200 ℃）
以下の領域では、必要に応じて水槽への浸漬を行って冷
却する浸漬装置４を適用することもある。遷移沸騰域の
温度範囲では自然放冷によるため、所定の冷却温度まで
のライン長を長くとる必要がある。
(3) 冷却帯10として、遷移沸騰域上限温度（350 ℃）以
上の領域にミスト冷却装置３を適用し、以降では、ガス
ジェット冷却装置２を適用する。遷移沸騰域上限温度
（350 ℃）以下ではガスジェット冷却によるため、冷却
帯が長くなる。Therefore, in cooling the metal strip after the conventional heat treatment, the following methods shown in FIG. 3 have been adopted. (1) As the cooling zone 10, a required number of gas jet cooling devices 2 for cooling the metal strip 1 are used in series (see FIG. 3).
(A)). However, since the gas jet cooling device has a low cooling efficiency, the cooling zone length is inevitably long. (2) As the cooling zone 10, a required number of mist cooling devices 3 are connected in a region above the transition boiling region upper limit temperature (350 ° C.) and used (FIG. 3 (b)). The lower limit temperature of the transition boiling region (200 ℃)
In the following areas, the dipping device 4 for dipping in a water tank and cooling may be applied as needed. Since natural cooling is performed in the temperature range of the transition boiling region, it is necessary to lengthen the line length up to a predetermined cooling temperature. (3) As the cooling zone 10, the mist cooling device 3 is applied to a region above the transition boiling region upper limit temperature (350 ° C.), and thereafter, the gas jet cooling device 2 is applied. Below the upper limit temperature of the transition boiling region (350 ℃), the cooling zone becomes longer because of gas jet cooling.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、上記(1) 〜
(3) の各方式を始めとする従来の冷却方法の有する問題
を解決し、不均一な冷却を起こさず、かつ、冷却に要す
るライン長を短くして金属ストリップの冷却を行う冷却
帯に適用する冷却制御方法および装置を提供するもので
ある。The present invention is based on the above (1)-
Applied to a cooling zone that solves the problems of conventional cooling methods such as (3) and does not cause uneven cooling, and that cools the metal strip by shortening the line length required for cooling. The present invention provides a cooling control method and device.
【０００７】[0007]
【課題を解決するための手段】本発明は、ガスジェット
冷却とミスト冷却を自在に切替可能とした兼用型の冷却
帯に対して適用するものであり、不均一冷却となる遷移
沸騰域の温度域においては、ガスジェット冷却を用い、
遷移沸騰域の下限温度以下でミスト冷却を行うようにす
ることを特徴とする。The present invention is applied to a dual-purpose cooling zone in which gas jet cooling and mist cooling are freely switchable, and the temperature in the transition boiling region is non-uniform cooling. In the area, using gas jet cooling,
It is characterized in that mist cooling is performed below the lower limit temperature of the transition boiling region.
【０００８】すなわち、本発明は、下記の各項記載の冷
却制御方法および装置によって上記課題を解決した。
ガスジェット冷却とミスト冷却を自在に切替え可能
な冷却装置を多段構成としてなる冷却帯で、金属ストリ
ップの冷却を行うに際し、該金属ストリップの温度が遷
移沸騰域下限温度（200 ℃）に至るまでの領域をガスジ
ェット冷却とし、以降の領域をミスト冷却として金属ス
トリップの冷却を行う冷却方法。
前記冷却帯の入側で金属ストリップの温度を測定
し、該温度の測定値に基いて、ミスト冷却により前記金
属ストリップが前記遷移沸騰域下限温度（200 ℃）に至
るまでの領域を算出することを特徴とする上記に記載
の冷却方法。
前記冷却装置を、水とガスを混合して噴射すること
で冷却を行うミスト冷却装置として構成し、更に、前記
水を自在に遮断可能とすることで、各段のミスト冷却を
ガスジェット冷却に自在に切替え可能として冷却を行う
ことを特徴とする上記またはに記載の冷却方法。
上記乃至のいずれかに記載の冷却方法におい
て、更に、前記金属ストリップ温度が100 ℃以下の領域
で、ガスジェット冷却を行うことを特徴とする冷却方
法。
熱処理後の金属ストリップを冷却する冷却設備であ
って、ガス供給路と、水の供給を自在に遮断する遮断弁
を有する水供給路とを有し、該遮断弁のオンオフでミス
ト冷却とガスジェット冷却を自在に切替えて冷却可能と
した冷却装置が多段構成とされた冷却帯と、冷却帯入側
の金属帯の温度を測定する温度測定手段と、該温度測定
手段による温度測定値に基づき、前記金属ストリップの
温度が遷移沸騰域下限温度（200 ℃）に至るまでの冷却
帯の冷却長を算出し、該冷却長内の冷却装置をガスジェ
ット冷却とし、以降の冷却装置をミスト冷却とする制御
機能を有してなる制御装置と、を有することを特徴とす
る冷却設備。
前記制御装置が、前記金属ストリップの温度が100
℃に至るまでの冷却帯の冷却長を算出する機能を有し、
当該冷却長以降の冷却装置を再度ガスジェット冷却とす
る制御機能を有してなることを特徴とする上記に記載
の冷却設備。That is, the present invention has solved the above problems by the cooling control method and apparatus described in the following items. When cooling a metal strip in a cooling zone consisting of a multi-stage cooling device that can freely switch between gas jet cooling and mist cooling, when the temperature of the metal strip reaches the transition boiling range lower limit temperature (200 ℃) A cooling method in which the metal strip is cooled by using gas jet cooling in the area and mist cooling in the subsequent area. The temperature of the metal strip is measured on the inlet side of the cooling zone, and based on the measured value of the temperature, the region until the metal strip reaches the transition boiling range lower limit temperature (200 ° C) by mist cooling is calculated. The cooling method as described above, characterized by: The cooling device is configured as a mist cooling device that performs cooling by mixing and injecting water and gas, and further, by freely blocking the water, mist cooling at each stage is changed to gas jet cooling. The cooling method described in the above item 1 or 2, wherein the cooling is performed so as to be freely switchable. The cooling method according to any one of the above 1 to 5, further comprising performing gas jet cooling in a region where the metal strip temperature is 100 ° C. or lower. A cooling facility for cooling a metal strip after heat treatment, comprising a gas supply passage and a water supply passage having a shutoff valve for freely shutting off water supply, and mist cooling and gas jet by turning the shutoff valve on and off. A cooling zone having a multi-stage cooling device capable of cooling by freely switching cooling, temperature measuring means for measuring the temperature of the metal zone on the cooling zone entrance side, and based on a temperature measurement value by the temperature measuring means, The cooling length of the cooling zone until the temperature of the metal strip reaches the transition boiling lower limit temperature (200 ° C.) is calculated, the cooling device within the cooling length is gas jet cooling, and the subsequent cooling devices are mist cooling. A cooling facility comprising: a control device having a control function. The controller controls that the temperature of the metal strip is 100
Has a function to calculate the cooling length of the cooling zone up to ℃,
The cooling facility as described above, which has a control function of again performing gas jet cooling on the cooling device after the cooling length.
【０００９】[0009]
【発明の実施の形態】本発明の好適な実施の形態を図１
に基づいて説明する。本発明では、冷却帯10を、ミスト
冷却とガスジェット冷却が自在に切替え可能となるよう
にする。図１においては、遮断弁13を設けて遮断自在と
した水供給路６からの水と、空気等のガスを供給するガ
ス供給路７からのガスとを混合してミストを噴射する個
別の冷却装置10a が多段に構成されて冷却帯10として構
成されている。ここで、遮断弁で水を遮断した冷却装置
は、ガスジェット冷却方式の冷却装置となる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention is shown in FIG.
It will be described based on. In the present invention, the cooling zone 10 can be freely switched between mist cooling and gas jet cooling. In FIG. 1, individual cooling is performed by mixing water from a water supply passage 6 that is provided with a shutoff valve 13 and can be shut off with gas from a gas supply passage 7 that supplies gas such as air, and injects mist. The device 10a is configured as a cooling zone 10 in multiple stages. Here, the cooling device in which water is shut off by the shutoff valve is a gas jet cooling type cooling device.
【００１０】なお、本発明に適用する冷却帯10の構成
は、これに限定するものではなく、例えば、ミスト冷却
装置とガスジェット冷却装置を並列させて選択的に切替
えるようにしてもよく、また、ガスジェット冷却装置の
ガスジェットを噴射するノズルの前に、オンオフ可能と
したミスト噴射口を設け、噴射するガスジェットに選択
的にミストを重畳させるようにしてもよい。すなわち、
本発明においては、ミスト冷却とガスジェット冷却の切
替えを特に限定するものでないことは明らかである。The structure of the cooling zone 10 applied to the present invention is not limited to this. For example, the mist cooling device and the gas jet cooling device may be arranged in parallel and selectively switched. A mist injection port that can be turned on and off may be provided in front of the nozzle for injecting the gas jet of the gas jet cooling device, and the mist may be selectively superimposed on the gas jet to be injected. That is,
In the present invention, it is obvious that switching between mist cooling and gas jet cooling is not particularly limited.
【００１１】次に、冷却帯10において、ミスト冷却とガ
スジェット冷却の切替位置、すなわち、ミスト冷却長と
ガスジェット冷却長を算出し、その切替位置を制御する
具体的方式について説明する。冷却帯10における金属ス
トリップ１の冷却パターンは、ライン搬送スピード、金
属ストリップ板厚等の操業条件と、冷却帯10入側に設け
た温度測定手段12で測定した温度測定値、つまり、冷却
帯入側温度（Ｔ1 ）に基づき、例えば下記の計算モデル
式を適用することで容易に算出できる。Next, in the cooling zone 10, a specific method for calculating the switching position between the mist cooling and the gas jet cooling, that is, the mist cooling length and the gas jet cooling length and controlling the switching position will be described. The cooling pattern of the metal strip 1 in the cooling zone 10 is the operating conditions such as line transfer speed and metal strip plate thickness, and the temperature measurement value measured by the temperature measuring means 12 provided on the inlet side of the cooling zone 10, that is, the cooling zone It can be easily calculated based on the side temperature (T 1 ) by applying the following calculation model formula, for example.
【００１２】すなわち、ガスジェット冷却で金属ストリ
ップが、温度Ｔ1 から遷移沸騰域下限温度（200 ℃）と
なるまでの冷却長Ｌ1 は、下記（１）式で計算できる。That is, the cooling length L 1 from the temperature T 1 to the transition boiling range lower limit temperature (200 ° C.) of the metal strip by gas jet cooling can be calculated by the following equation (1).
【００１３】[0013]
【数１】 [Equation 1]
【００１４】ここで、LS：ラインスピード、Ｄ：板厚、
ρ：密度、Ｃp ：比熱、α：ガスジェット熱伝達係数、
Ｔa ：ガスジェット温度、である。また、遷移沸騰域下
限温度（200 ℃）から、冷却帯出側の目標温度（Ｔ2 ）
までのミスト冷却による冷却長Ｌ2 は、下記（２）式で
計算できる。Where LS: line speed, D: plate thickness,
ρ: density, Cp: specific heat, α: gas jet heat transfer coefficient,
T a is the gas jet temperature. Also, from the lower limit temperature of the transition boiling region (200 ℃), the target temperature (T 2 ) of the cooling zone exit side
The cooling length L 2 due to mist cooling up to can be calculated by the following equation (2).
【００１５】[0015]
【数２】 [Equation 2]
【００１６】ここで、ｑ：ミスト冷却による熱流束、で
ある。
図１に示す本発明の冷却設備では、上記の計算モデルを
採用し、温度測定手段12で、冷却帯入側温度（Ｔ1 ）を
測定し、その測定値を入力として、冷却長算出装置11a
で所要の計算を行い、算出した冷却長に基づいて各遮断
弁13のオンオフを制御装置11で制御する。なお、水のオ
ンオフを行う遮断弁13の個数を多くし、冷却装置10a を
細分化して設けるほど制御性は良くなる。Here, q is a heat flux due to mist cooling. In the cooling equipment of the present invention shown in FIG. 1, the above calculation model is adopted, the temperature measuring means 12 measures the cooling zone entrance side temperature (T 1 ), and the measured value is input to the cooling length calculating device 11a.
Then, the controller 11 controls ON / OFF of each shutoff valve 13 based on the calculated cooling length. It should be noted that the controllability becomes better as the number of shutoff valves 13 for turning water on and off is increased and the cooling device 10a is subdivided.
【００１７】なお、金属ストリップの温度が100 ℃以下
の領域でミスト冷却を行うと、金属ストリップの表面に
付着した水滴が蒸発しにくく、金属ストリップの巻取等
の次工程を行うまでに、ドライヤ等により金属ストリッ
プを乾燥する工程が必要となる場合がある。100 ℃以下
の領域をガスジェット冷却とすることにより、冷却帯出
側での乾燥工程を省略できるので、100 ℃以下の領域
は、ガスジェット冷却とすることが好ましい。When mist cooling is performed in a region where the temperature of the metal strip is 100 ° C. or less, water droplets adhering to the surface of the metal strip are less likely to evaporate, and the dryer may be used before the next step such as winding the metal strip. In some cases, a step of drying the metal strip may be required due to the above reasons. By performing the gas jet cooling in the region of 100 ° C. or lower, the drying step on the cooling zone outlet side can be omitted.
【００１８】[0018]
【実施例】本発明の冷却制御方法を、熱処理後の冷延鋼
帯を冷却する冷却帯の制御に適用し、従来例との比較を
行った。なお、冷却を行う冷延鋼帯の板厚は0.8mm 、板
幅は1500mmであり、そのラインスピードは200mpmであ
る。また、その冷却帯入側温度は300 ℃である。EXAMPLES The cooling control method of the present invention was applied to control of a cooling zone for cooling a cold rolled steel strip after heat treatment, and comparison was made with a conventional example. The cold-rolled steel strip to be cooled has a thickness of 0.8 mm, a width of 1500 mm, and a line speed of 200 mpm. The temperature on the inlet side of the cooling zone is 300 ° C.
【００１９】以上の条件で、下記の２つの評価指標に基
づく評価を実施した。
(1) 冷延鋼帯が100 ℃となるまでに必要とする冷却長
本発明の冷却制御方法を適用した場合、ガスジェット冷
却で200 ℃となるまでの冷却長は15ｍであり、その後の
ミスト冷却による冷却長は４ｍであった。なお、冷却帯
の残長は、再びガスジェット冷却とした。Under the above conditions, the evaluation was carried out based on the following two evaluation indexes. (1) Cooling length required until cold rolled steel strip reaches 100 ° C When the cooling control method of the present invention is applied, the cooling length until reaching 200 ° C by gas jet cooling is 15 m, and the mist after that The cooling length by cooling was 4 m. The remaining length of the cooling zone was gas jet cooling again.
【００２０】一方、従来例では、全長をガスジェット冷
却とすると40ｍの冷却長が必要となる。また、全長をミ
スト冷却とすると９ｍであった。ただし、全長をミスト
冷却とする場合は、冷却長は短くなるものの次項の温度
偏差が問題となる。
(2) 冷却処理中の幅方向最大温度偏差
本発明の冷却方法を適用した場合の最大温度偏差（ max
ΔＴ）は、20℃であった。On the other hand, in the conventional example, if the entire length is gas jet cooling, a cooling length of 40 m is required. The length was 9 m when the entire length was mist cooled. However, when mist cooling is performed over the entire length, the cooling length is shortened, but the temperature deviation described in the next item poses a problem. (2) Maximum temperature deviation in the width direction during cooling process Maximum temperature deviation (max when the cooling method of the present invention is applied
ΔT) was 20 ° C.
【００２１】一方、従来例では、全長をガスジェット冷
却とした場合、本発明適用の場合と同様、最大温度偏差
（ maxΔＴ）は20℃であった。一方、全長をミスト冷却
とした場合、最大温度偏差（ maxΔＴ）は100 ℃と非常
に大きくなった。以上の結果を、表１にまとめて示す。On the other hand, in the conventional example, when the entire length was gas jet cooled, the maximum temperature deviation (maxΔT) was 20 ° C. as in the case of applying the present invention. On the other hand, when the entire length was mist-cooled, the maximum temperature deviation (maxΔT) was extremely large at 100 ° C. The above results are summarized in Table 1.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【発明の効果】本発明の適用によって、熱処理後の金属
ストリップの冷却において、不均一な冷却を起こさず、
かつ、冷却に要するライン長を短くすることができた。According to the application of the present invention, in the cooling of the metal strip after heat treatment, non-uniform cooling does not occur,
In addition, the line length required for cooling could be shortened.
【図１】本発明の金属ストリップの冷却設備の模式図で
ある。FIG. 1 is a schematic view of cooling equipment for a metal strip according to the present invention.
【図２】水冷における遷移沸騰域について説明するグラ
フである。FIG. 2 is a graph illustrating a transition boiling region in water cooling.
【図３】従来の金属ストリップの冷却について説明する
模式図である。FIG. 3 is a schematic diagram illustrating cooling of a conventional metal strip.
【符号の説明】 １ 金属ストリップ ２ ガスジェット冷却装置 ３ ミスト冷却装置 ４ 浸漬冷却装置 ６ 水供給路 ７ ガス供給路 10 冷却帯 10a （個別の）冷却装置 11 冷却制御装置 11a 冷却長算出装置 12 温度測定手段 13 遮断弁[Explanation of symbols] 1 metal strip 2 Gas jet cooling device 3 Mist cooling device 4 Immersion cooling device 6 water supply channel 7 gas supply path 10 cooling zones 10a (individual) cooling system 11 Cooling control device 11a Cooling length calculator 12 Temperature measuring means 13 Shut-off valve
フロントページの続き Ｆターム(参考） 4K038 AA01 BA01 CA03 DA01 EA01 FA02 4K043 AA01 CB01 CB04 EA07 FA07 FA13 Continued front page F-term (reference) 4K038 AA01 BA01 CA03 DA01 EA01 FA02 4K043 AA01 CB01 CB04 EA07 FA07 FA13
Claims (6)
切替え可能な冷却装置を多段構成としてなる冷却帯で、
金属ストリップの冷却を行うに際し、該金属ストリップ
の温度が遷移沸騰域下限温度（200 ℃）に至るまでの領
域をガスジェット冷却とし、以降の領域をミスト冷却と
して金属ストリップの冷却を行う冷却方法。1. A cooling zone comprising a multi-stage cooling device capable of freely switching between gas jet cooling and mist cooling,
A method of cooling a metal strip, wherein when cooling the metal strip, a region where the temperature of the metal strip reaches a transition boiling lower limit temperature (200 ° C.) is gas jet cooling, and subsequent regions are mist cooling to cool the metal strip.
度を測定し、該温度の測定値に基いて、ミスト冷却によ
り前記金属ストリップが前記遷移沸騰域下限温度（200
℃）に至るまでの領域を算出することを特徴とする請求
項１に記載の冷却方法。2. The temperature of the metal strip is measured at the inlet side of the cooling zone, and based on the measured value of the temperature, the metal strip is subjected to mist cooling so that the metal strip has a lower limit temperature (200
The cooling method according to claim 1, wherein a region up to (° C.) is calculated.
射することで冷却を行うミスト冷却装置として構成し、
更に、前記水を自在に遮断可能とすることで、各段のミ
スト冷却をガスジェット冷却に自在に切替え可能として
冷却を行うことを特徴とする請求項１または２に記載の
冷却方法。3. The cooling device is configured as a mist cooling device that cools by mixing and jetting water and gas,
The cooling method according to claim 1 or 2, wherein the water can be freely shut off so that the mist cooling of each stage can be freely switched to gas jet cooling for cooling.
方法において、更に、前記金属ストリップ温度が100 ℃
以下の領域で、ガスジェット冷却を行うことを特徴とす
る冷却方法。4. The cooling method according to claim 1, wherein the metal strip temperature is 100 ° C.
A cooling method comprising performing gas jet cooling in the following areas.
却設備であって、ガス供給路と、水の供給を自在に遮断
する遮断弁を有する水供給路とを有し、該遮断弁のオン
オフでミスト冷却とガスジェット冷却を自在に切替えて
冷却可能とした冷却装置が多段構成とされた冷却帯と、
冷却帯入側の金属帯の温度を測定する温度測定手段と、
該温度測定手段による温度測定値に基づき、前記金属ス
トリップの温度が遷移沸騰域下限温度（200 ℃）に至る
までの冷却帯の冷却長を算出し、該冷却長内の冷却装置
をガスジェット冷却とし、以降の冷却装置をミスト冷却
とする制御機能を有してなる制御装置と、を有すること
を特徴とする冷却設備。5. A cooling facility for cooling a metal strip after heat treatment, comprising a gas supply passage and a water supply passage having a shutoff valve for freely shutting off water supply. A cooling zone with a multi-stage cooling device that can be cooled by freely switching between mist cooling and gas jet cooling,
Temperature measuring means for measuring the temperature of the metal strip on the cooling zone entrance side,
Based on the temperature measured by the temperature measuring means, the cooling length of the cooling zone until the temperature of the metal strip reaches the transition boiling lower limit temperature (200 ° C) is calculated, and the cooling device within the cooling length is gas jet cooled. And a control device having a control function for mist cooling the subsequent cooling device.
温度が100 ℃に至るまでの冷却帯の冷却長を算出する機
能を有し、当該冷却長以降の冷却装置を再度ガスジェッ
ト冷却とする制御機能を有してなることを特徴とする請
求項５に記載の冷却設備。6. The control device having a function of calculating a cooling length of a cooling zone until the temperature of the metal strip reaches 100 ° C., and controlling the cooling device after the cooling length to be gas jet cooling again. The cooling facility according to claim 5, which has a function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002081453A JP3783640B2 (en) | 2002-03-22 | 2002-03-22 | Cooling method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002081453A JP3783640B2 (en) | 2002-03-22 | 2002-03-22 | Cooling method and equipment |
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|---|---|
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| JP3783640B2 JP3783640B2 (en) | 2006-06-07 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014189880A (en) * | 2013-03-28 | 2014-10-06 | Jfe Steel Corp | Rail cooling header |
| JP2015504973A (en) * | 2011-12-15 | 2015-02-16 | ポスコ | Method and apparatus for controlling strip temperature in quench zone in continuous annealing line |
| CN104946877A (en) * | 2015-05-18 | 2015-09-30 | 武汉钢铁(集团)公司 | Shake inhibiting and correcting method and device for strip steel in alloying furnace |
| WO2022215304A1 (en) | 2021-04-05 | 2022-10-13 | Ｊｆｅスチール株式会社 | Method for controlling temperature of cooling water for steel plate and device for controlling temperature of cooling water |
-
2002
- 2002-03-22 JP JP2002081453A patent/JP3783640B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015504973A (en) * | 2011-12-15 | 2015-02-16 | ポスコ | Method and apparatus for controlling strip temperature in quench zone in continuous annealing line |
| US9783867B2 (en) | 2011-12-15 | 2017-10-10 | Posco | Method and apparatus for controlling the strip temperature of the rapid cooling section of a continuous annealing line |
| JP2014189880A (en) * | 2013-03-28 | 2014-10-06 | Jfe Steel Corp | Rail cooling header |
| CN104946877A (en) * | 2015-05-18 | 2015-09-30 | 武汉钢铁(集团)公司 | Shake inhibiting and correcting method and device for strip steel in alloying furnace |
| WO2022215304A1 (en) | 2021-04-05 | 2022-10-13 | Ｊｆｅスチール株式会社 | Method for controlling temperature of cooling water for steel plate and device for controlling temperature of cooling water |
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| Publication number | Publication date |
|---|---|
| JP3783640B2 (en) | 2006-06-07 |
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