JPH0550133A - Descaling injection method - Google Patents
Descaling injection methodInfo
- Publication number
- JPH0550133A JPH0550133A JP3213571A JP21357191A JPH0550133A JP H0550133 A JPH0550133 A JP H0550133A JP 3213571 A JP3213571 A JP 3213571A JP 21357191 A JP21357191 A JP 21357191A JP H0550133 A JPH0550133 A JP H0550133A
- Authority
- JP
- Japan
- Prior art keywords
- rolled material
- descaling
- width direction
- width
- injection
- 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.)
- Granted
Links
Landscapes
- Control Of Metal Rolling (AREA)
- Nozzles (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
(57)【要約】
【目的】本発明はスタンド間での狭いスペースでデスケ
ーリングを効率的に行うことを目的とする。
【構成】熱間圧延機の仕上スタンド間にあって、ノズル
から鋼材表面に向けて高圧水を噴射する際、幅方向に配
したノズルを単独に開閉あるいは開度を調節する。また
噴射ノズルよりも上流に幅方向温度計を設け、幅方向温
度計の情報に基づき圧延材の幅を外れた位置の噴射ノズ
ルを閉止する。
(57) [Summary] [Object] The present invention aims to efficiently perform descaling in a narrow space between stands. [Structure] When high-pressure water is jetted from the nozzle toward the surface of the steel material between the finishing stands of the hot rolling mill, the nozzles arranged in the width direction are individually opened and closed or the opening degree is adjusted. Further, a width direction thermometer is provided upstream of the injection nozzle, and the injection nozzle at a position outside the width of the rolled material is closed based on the information of the width direction thermometer.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、仕上スタンド間で圧
延材にデスケーリングを施すデスケーリング噴射方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a descaling injection method for descaling rolled material between finishing stands.
【０００２】[0002]
【従来の技術】通常のホットストリップミルでは、仕上
圧延機列と粗圧延機列の間に設けたデスケーリング設備
でスケールを除去し、美麗な表面にした後で仕上圧延機
で圧延する。しかし圧延材は仕上圧延機列で圧延される
間に表面に２次スケールが発生する。このため、仕上圧
延機列と粗圧延機列の間で行うデスケーリングのみで
は、２次スケールによるスケール疵が発生し、ホットコ
イルのスケール疵の発生防止には十分ではない。2. Description of the Related Art In a conventional hot strip mill, descaling equipment provided between a row of finish rolling mills and a row of rough rolling mills removes scales to form a beautiful surface and then rolls with a finish rolling mill. However, a secondary scale is generated on the surface of the rolled material during rolling by the finishing rolling mill train. Therefore, only the descaling performed between the finishing rolling mill row and the rough rolling mill row causes scale flaws due to the secondary scale, and is not sufficient for preventing the scale flaws of the hot coil.
【０００３】図３は従来の仕上スタンド間デスケーリン
グ装置の例である。図３ (Ａ)は幅広圧延材用のヘッダ
ー管１と幅狭圧延材用のヘッダー管１'との両方を有す
るデスケーリング装置の例で、幅広圧延材の場合には広
い幅に亘って噴出ノズル４が配されたヘッダー管１を専
ら用い、幅狭圧延材の場合には狭い幅に亘って噴出ノズ
ルが配されたヘッダー管１'を専ら使用する。図３(Ｂ)
は一本のヘッダー管内に中央室２と側室３，３'を設け
た例で、幅狭圧延材の場合には中央室２のみに高圧水を
供給し、幅広圧延材の場合には中央室２と側室３，３'
に高圧水を供給するデスケーリング装置である。しかし
この等の従来のデスケーリング装置では、例えば図３
で、幅がＷ1よりも大きくＷ2よりも小さい、幅広圧延材
と幅狭圧延材の中間の幅の圧延材の場合には、図３(Ａ)
の広幅用のヘッダー管１や図３(Ｂ)の側室３，３'を用
いることとなるが、圧延材の幅から外れた位置の噴射ノ
ズルからも３０ｋｇ／ｃｍ2〜１５０ｋｇ／ｃｍ2の高圧
水が噴射し、この高圧水が他の周辺設備にかかって周辺
設備を損傷させるという問題点がある。またデスケーリ
ング高圧水の使用原単位が高いという問題点がある。FIG. 3 shows an example of a conventional descaling device between finishing stands. FIG. 3 (A) shows an example of a descaling device having both a header pipe 1 for wide rolled material and a header pipe 1'for narrow rolled material. The header pipe 1 in which the nozzles 4 are arranged is exclusively used, and in the case of a narrow rolled material, the header pipe 1 ′ in which the ejection nozzles are arranged over a narrow width is exclusively used. Figure 3 (B)
Is an example in which a central chamber 2 and side chambers 3 and 3'are provided in one header pipe. In the case of narrow rolled material, high-pressure water is supplied only to the central chamber 2, and in the case of wide rolled material, the central chamber is supplied. 2 and side chamber 3,3 '
It is a descaling device that supplies high-pressure water to. However, in the conventional descaling device such as this, for example, in FIG.
In less than large W 2 than the width W 1, in the case of the rolled material in the middle of the width of the wide rolled material and the narrow rolled material, Figure 3 (A)
Pressure should be calculated using the side chamber 3,3 'of the header pipes 1 and 3 for wide (B), also from the injection nozzle at a position deviated from the width of the strip of 30kg / cm 2 ~150kg / cm 2 There is a problem that water is jetted and this high-pressure water impinges on other peripheral equipment and damages the peripheral equipment. There is also a problem that the unit consumption of descaling high-pressure water is high.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、これ等の従
来の問題点を解決する仕上スタンド間デスケーリング方
法であって、具体的には仕上スタンド間という狭いスペ
ースで、高圧水を不必要な部分に噴射する事がなく、か
つ幅広圧延材の場合も幅狭圧延材の場合も十分に２次ス
ケールを除去することができる、デスケーリング方法を
提供するものである。SUMMARY OF THE INVENTION The present invention is a descaling method between finishing stands that solves these conventional problems, and specifically, it does not require high pressure water in a narrow space between finishing stands. (EN) A descaling method capable of removing secondary scale sufficiently without injecting into a large area and capable of sufficiently removing a secondary scale in both a wide rolled material and a narrow rolled material.
【０００５】[0005]
【課題を解決するための手段および作用】図１は本発明
で用いる噴射ノズルとヘッダー管の説明図である。FIG. 1 is an explanatory view of an injection nozzle and a header pipe used in the present invention.
【０００６】本発明では、圧延材の幅方向に圧延材の幅
よりも広い範囲に亘って多数の噴射ノズル４を配したヘ
ッダー管１を仕上スタンド間に配するが、各噴射ノズル
４はそれぞれが独立して開閉が可能な噴射ノズルとす
る。仕上スタンド間は例えば長さが約５ｍで、ルーパー
やガイド等が設けられているために極めて狭隘である。
この狭隘なスペースに図３(Ａ)で示したヘッダー管１，
１'等を多本数設ける事は難しい。又図３(Ｂ)でヘッダ
ー管内を３区分以上とする隔壁を設けると、高圧水供給
管６，６'の本数が増加しスペースが更に狭隘となる。
本発明では各噴射ノズル４に、例えば機械力、電気磁気
力、液圧力等で作動する遮断弁５を設けるが、遮断弁５
を操作する配線や配管はコンパクトに纏めることができ
るため、狭隘な仕上スタンド間に支障なく収納できる。In the present invention, the header pipe 1 having a large number of injection nozzles 4 arranged in the width direction of the rolled material over a range wider than the width of the rolled material is arranged between the finishing stands. Is an injection nozzle that can be opened and closed independently. The distance between the finishing stands is, for example, about 5 m, and is extremely narrow because a looper, guides, etc. are provided.
In this narrow space, the header pipe 1 shown in FIG.
It is difficult to provide a large number of 1's. Further, if a partition wall is provided to divide the header pipe into three or more sections in FIG. 3 (B), the number of high pressure water supply pipes 6 and 6'increases and the space becomes narrower.
In the present invention, each injection nozzle 4 is provided with a shutoff valve 5 which operates by mechanical force, electromagnetic force, hydraulic pressure, etc.
Since the wiring and piping for operating can be compactly packed, they can be stored between narrow finishing stands without any trouble.
【０００７】本発明ではまた、該ヘッダー管１よりも上
流に幅方向温度計７を設ける。図２は本発明のヘッダー
管１と幅方向温度計７の配置の例の説明図である。幅方
向温度計７はヘッダー管１と同じ仕上スタンド間例えば
Ｆ3とＦ4の間で、ヘッダー管１よりも上流に設けてもよ
いが、上流の仕上スタンドＦ3よりも更に上流に設けて
もよい。In the present invention, a widthwise thermometer 7 is provided upstream of the header tube 1. FIG. 2 is an explanatory view of an example of arrangement of the header tube 1 and the width direction thermometer 7 of the present invention. The width-direction thermometer 7 may be provided upstream of the header tube 1 between the same finishing stands as the header tube 1, for example, between F 3 and F 4 , but further upstream of the upstream finishing stand F 3. Good.
【０００８】幅方向温度計は、圧延材の幅方向の小区分
（メッシュ）毎の温度をそれぞれ検知できる温度計であ
る。The width-direction thermometer is a thermometer capable of detecting the temperature of each small section (mesh) in the width direction of the rolled material.
【０００９】例えば幅狭の圧延材が走行している際は、
圧延材の幅から外れたメッシュ部の検知温度は低いが本
発明ではこの検知結果を制御装置に伝えて、圧延材の幅
から外れたメッシュに相当する位置に配されている噴射
ノズル４の遮断弁５を閉止し噴出水を遮断する。従って
圧延材の幅から外れた位置の噴射ノズルが高圧水が噴射
する事がない。For example, when a narrow rolled material is running,
Although the detection temperature of the mesh portion deviated from the width of the rolled material is low, in the present invention, the detection result is transmitted to the control device to shut off the injection nozzle 4 arranged at the position corresponding to the mesh deviated from the width of the rolled material. The valve 5 is closed to shut off the jetted water. Therefore, high-pressure water will not be jetted by the jet nozzle located outside the width of the rolled material.
【００１０】以上述べた如く、本発明は圧延材の幅方向
に多数の噴射ノズルを配したヘッダー管を仕上スタンド
間に配して該噴射ノズルからの吐出噴流により圧延材の
２次スケールを除去する仕上スタンド間でのデスケーリ
ングに際して、それぞれが独立して開閉可能な噴射ノズ
ルを用い、かつ該ヘッダー管よりも上流に幅方向温度計
を設け、該幅方向温度計が検知した圧延材の幅方向の温
度分布に基づき、制御装置を介して、圧延材の幅を外れ
た位置の噴射ノズルを閉止して、デスケーリングの注水
幅を制御することを特徴とする、デスケーリング噴射方
法である。As described above, according to the present invention, the header pipe having a large number of injection nozzles arranged in the width direction of the rolled material is arranged between the finishing stands, and the secondary scale of the rolled material is removed by the jet stream discharged from the injection nozzles. When descaling between finishing stands, each uses a spray nozzle that can be opened and closed independently, and a width direction thermometer is provided upstream of the header pipe, and the width of the rolled material detected by the width direction thermometer. The descaling injection method is characterized in that, based on the temperature distribution in the direction, the injection nozzle at a position outside the width of the rolled material is closed via the control device to control the water injection width for descaling.
【００１１】本発明ではまた、圧延材の温度を均一化す
ることができる。仕上圧延においては、圧延材のエッジ
部は低温になり易いが、低温部では２次スケールが発生
しないためにデスケーリングの必要は少ない。本発明で
はデスケーリングが必要な最低温度Ｔoを予め設定して
おくことができる。圧延材のエッジ部のメッシュの検知
温度がＴoよりも高温の場合は、圧延材のエッジ部に相
当する位置に配されている噴射ノズルから吐出水を噴出
させ、Ｔoよりも低温の場合はエッジ部に相当する位置
に配されている噴射ノズルを遮断する。この方法による
とエッジ部は低温に冷却され過ぎることがなく、かつエ
ッジ部の必要なデスケーリングを十分に行うことができ
る。Further, according to the present invention, the temperature of the rolled material can be made uniform. In the finish rolling, the edge portion of the rolled material tends to have a low temperature, but the secondary scale does not occur in the low temperature portion, so that descaling is less necessary. In the present invention, the minimum temperature To that requires descaling can be set in advance. If the detected temperature of the mesh of the edge of the rolled material is higher than To, the discharge water is jetted from the injection nozzle arranged at the position corresponding to the edge of the rolled material, and if the temperature is lower than To, the edge The injection nozzle arranged at the position corresponding to the section is shut off. According to this method, the edge portion is not cooled too low, and the necessary descaling of the edge portion can be sufficiently performed.
【００１２】エッジ部の温度の制御は例えば下記の如く
に行うこともできる。図２のＦ3とＦ4の間でデスケーリ
ングするに際し、圧延材８の表面温度をＦ3よりも更に
上流に設けた幅方向温度計７で検知する。上位プロセス
コンピュータ１０から、各圧延材毎にデスケーリングが
必要な温度Ｔoを演算するのに必要な情報を演算装置９
に入力し、演算装置９は下記式に沿ってＴoiを演算す
る。The temperature of the edge portion can be controlled as follows, for example. At the time of descaling between F 3 and F 4 in FIG. 2, the surface temperature of the rolled material 8 is detected by the width direction thermometer 7 provided further upstream of F 3 . The information necessary for calculating the temperature To that requires descaling for each rolled material is calculated from the upper process computer 10 by the calculation device 9
The calculation unit 9 calculates Toi according to the following equation.
【００１３】 Ｔoi＝α1(ｔ−ｔ0)＋α2(ＦＴ−ＦＴ0)＋α3 但しα1，α2，α3：制御定数、ｔ：通板中の板厚、
ｔ0：基準板厚、ＦＴ：仕上出口温度、ＦＴ0：基準仕上
出口温度。Toi = α 1 (t−t 0 ) + α 2 (FT−FT 0 ) + α 3 where α 1 , α 2 and α 3 are control constants, t is the plate thickness in the threaded plate,
t 0 : reference plate thickness, FT: finishing outlet temperature, FT 0 : reference finishing outlet temperature.
【００１４】上記Ｔoiは、幅方向の各メッシュ毎に算出
される。幅方向温度計で検出した圧延材のエッジに相当
するメッシュの測定温度Ｔiと、圧延材のエッジに相当
する類値のＴoiとを対比する。Ｔi＞Ｔoiの場合はエッ
ジ部に相当する位置に制御装置１１を通じて高圧水を噴
射し、Ｔi＜Ｔoiの場合はエッジ部に相当する位置に配
された噴射ノズルからの噴出水を制御装置１１および遮
断弁５を介して遮断する。この方法によりると、F4より
も下流の仕上圧延スタンドでおいてもエッジ部が冷却さ
れ過ぎることがなく、かつエッジ部の必要なデスケーリ
ングを十分に行うことができる。The above Toi is calculated for each mesh in the width direction. The measured temperature Ti of the mesh corresponding to the edge of the rolled material detected by the width direction thermometer is compared with the similar value Toi corresponding to the edge of the rolled material. When Ti> Toi, high-pressure water is jetted through the control device 11 to a position corresponding to the edge portion, and when Ti <Toi, jetting water from a jet nozzle arranged at a position corresponding to the edge portion is fed to the control device 11 and It shuts off via the shutoff valve 5. According to this method, the edge portion is not overcooled even in the finishing rolling stand downstream of F 4 , and the necessary descaling of the edge portion can be sufficiently performed.
【００１５】[0015]
【発明の効果】本発明の方法によると、仕上スタンド間
という狭いスペースで、高圧水を必要な部分には十分に
噴射し、不必要な部分に噴射することがない。このため
高圧水の噴射に起因する周辺機器の損傷が防止でき、高
圧水の使用量の削減が可能となる。According to the method of the present invention, in a narrow space between finishing stands, high-pressure water is sufficiently sprayed on a necessary portion and is not sprayed on an unnecessary portion. Therefore, it is possible to prevent damage to peripheral devices due to the injection of high-pressure water and reduce the amount of high-pressure water used.
図１は本発明で用いる、多数の噴射ノズルを有するヘッ
ダー管の説明図、図２は本発明のデスケーリング噴射方
法の例の説明図、図３は従来の仕上スタンド間デスケー
リング装置の例の説明図、である。FIG. 1 is an explanatory view of a header pipe having a large number of injection nozzles used in the present invention, FIG. 2 is an explanatory view of an example of a descaling injection method of the present invention, and FIG. 3 is an example of a conventional descaling device between finishing stands. FIG.
１(１')：ヘッダー管、 ２：中央室、 ３(３')：側
室、 ４：噴射ノズル、５：遮断弁、６(６')：高圧水
供給管、 ７：幅方向温度計、 ８：圧延材、９：演算
装置、 １０：上位プロセスコンピュータ、 １１：制
御装置。1 (1 '): Header pipe, 2: Central chamber, 3 (3'): Side chamber, 4: Injection nozzle, 5: Cutoff valve, 6 (6 '): High pressure water supply pipe, 7: Width direction thermometer, 8: rolled material, 9: arithmetic device, 10: upper process computer, 11: control device.
Claims (1)
たヘッダー管を仕上スタンド間に配して該噴射ノズルか
らの吐出噴流により圧延材の２次スケールを除去する仕
上スタンド間でのデスケーリングに際して、それぞれが
独立して開閉可能な噴射ノズルを用い、かつ該ヘッダー
管よりも上流に幅方向温度計を設け、該幅方向温度計が
検知した圧延材の幅方向の温度分布に基づき、制御装置
を介して、圧延材の幅を外れた位置の噴射ノズルを閉止
して、デスケーリングの注水幅を制御することを特徴と
する、デスケーリング噴射方法1. A header pipe having a large number of injection nozzles arranged in the width direction of a rolled material is arranged between finishing stands, and a secondary scale of the rolled material is removed by a jet stream discharged from the injection nozzles. At the time of descaling, an injection nozzle that can be opened and closed independently is used, and a width direction thermometer is provided upstream of the header pipe, based on the temperature distribution in the width direction of the rolled material detected by the width direction thermometer. , The descaling injection method, characterized in that the injection nozzle at a position outside the width of the rolled material is closed via the control device to control the water injection width for descaling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3213571A JPH089056B2 (en) | 1991-08-26 | 1991-08-26 | Descaling injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3213571A JPH089056B2 (en) | 1991-08-26 | 1991-08-26 | Descaling injection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0550133A true JPH0550133A (en) | 1993-03-02 |
| JPH089056B2 JPH089056B2 (en) | 1996-01-31 |
Family
ID=16641413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3213571A Expired - Lifetime JPH089056B2 (en) | 1991-08-26 | 1991-08-26 | Descaling injection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089056B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101064989B1 (en) * | 2008-12-26 | 2011-09-16 | 주식회사 포스코 | Descaling device and descaling system using the same |
| JP2018202359A (en) * | 2017-06-08 | 2018-12-27 | イフコ・ジャパン 株式会社 | Washing method for distribution container |
| CN113042553A (en) * | 2021-02-25 | 2021-06-29 | 首钢京唐钢铁联合有限责任公司 | Finish descaling device and hot rolling production line of hot rolling |
| CN115870356A (en) * | 2023-01-28 | 2023-03-31 | 北京首钢股份有限公司 | A descaling method for reducing temperature difference of slab width |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096315A (en) * | 1983-10-05 | 1985-05-29 | デイビー マツキー（シエフイールド）リミテツド | Rolling mill |
| JPS61231124A (en) * | 1985-04-03 | 1986-10-15 | Kawasaki Steel Corp | Method and apparatus for strain-free controlled cooling of steel plate |
-
1991
- 1991-08-26 JP JP3213571A patent/JPH089056B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096315A (en) * | 1983-10-05 | 1985-05-29 | デイビー マツキー（シエフイールド）リミテツド | Rolling mill |
| JPS61231124A (en) * | 1985-04-03 | 1986-10-15 | Kawasaki Steel Corp | Method and apparatus for strain-free controlled cooling of steel plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101064989B1 (en) * | 2008-12-26 | 2011-09-16 | 주식회사 포스코 | Descaling device and descaling system using the same |
| JP2018202359A (en) * | 2017-06-08 | 2018-12-27 | イフコ・ジャパン 株式会社 | Washing method for distribution container |
| CN113042553A (en) * | 2021-02-25 | 2021-06-29 | 首钢京唐钢铁联合有限责任公司 | Finish descaling device and hot rolling production line of hot rolling |
| CN113042553B (en) * | 2021-02-25 | 2023-02-17 | 首钢京唐钢铁联合有限责任公司 | Hot rolling fine descaling device and hot rolling production line |
| CN115870356A (en) * | 2023-01-28 | 2023-03-31 | 北京首钢股份有限公司 | A descaling method for reducing temperature difference of slab width |
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| Publication number | Publication date |
|---|---|
| JPH089056B2 (en) | 1996-01-31 |
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