JPH0959800A - Strip cleaning equipment - Google Patents
Strip cleaning equipmentInfo
- Publication number
- JPH0959800A JPH0959800A JP21364795A JP21364795A JPH0959800A JP H0959800 A JPH0959800 A JP H0959800A JP 21364795 A JP21364795 A JP 21364795A JP 21364795 A JP21364795 A JP 21364795A JP H0959800 A JPH0959800 A JP H0959800A
- Authority
- JP
- Japan
- Prior art keywords
- strip
- cleaning
- gutter
- cleaning gutter
- processing liquid
- 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.)
- Withdrawn
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
(57)【要約】
【目的】 鋼ストリップの電解酸洗に際して発生した気
泡を効率的にストリップ下面より脱離除去して脱スケー
ルを均一に行うための装置を提供する。
【構成】 ストリップ下面に近接して配置される上面が
開口した円形断面の洗浄樋と処理供給管とからなり、洗
浄樋の長手方向中央の位置において洗浄樋底近傍に洗浄
樋断面の接線方向に処理液を噴出するように処理液供給
管を取付け、下記のように規定する。
25度＜洗浄樋の開口角度ｋ＜180 度、
洗浄樋内径Ｈ＞２×処理液供給管内径Ｄ
(57) [Summary] [Object] To provide a device for efficiently desorbing and removing air bubbles generated during electrolytic pickling of steel strip from the lower surface of the strip to uniformly perform descaling. [Structure] A cleaning gutter having a circular cross-section with an open upper surface, which is arranged close to the bottom surface of the strip, and a processing supply pipe, and located in the longitudinal center of the cleaning gutter near the bottom of the cleaning gutter in the tangential direction of the cleaning gutter section. Attach the processing liquid supply pipe so as to eject the processing liquid, and specify as follows. 25 degrees <opening angle k of cleaning gutter <180 degrees, inner diameter H of cleaning gutter> 2 x inner diameter D of processing liquid supply pipe
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ストリップの洗浄装
置、特に電解酸洗などストリップの清浄化処理によって
発生するガス等の気泡の除去が効果的に行われるストリ
ップの洗浄装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip cleaning apparatus, and more particularly to a strip cleaning apparatus that effectively removes bubbles such as gas generated by a strip cleaning process such as electrolytic pickling.
【０００２】[0002]
【従来の技術】ストリップ、例えばステンレス鋼ストリ
ップの製造工程において、焼鈍後の脱スケールは不可欠
であり、種々の方法が行われている。そのうち電解反応
を利用した電解脱スケール法がよく用いられている。な
お、以下の説明においてストリップとしてステンレス鋼
ストリップを例にとって説明する。2. Description of the Related Art Descaling after annealing is indispensable in the manufacturing process of strips, for example, stainless steel strips, and various methods are used. Of these, the electrolytic descaling method utilizing the electrolytic reaction is often used. In the following description, a stainless steel strip will be described as an example of the strip.
【０００３】図１は、電解脱スケール法の説明図であ
り、ステンレス鋼ストリップ16は、焼鈍後、直ちに溶融
塩 (主成分NaOH、NaNO3)に浸漬してから、図示のよう
な、例えば50℃、15％HNO3溶液の電解浴の酸洗液10内を
走行しながら、それぞれ陽極12、陰極14の電極対による
間接通電交番電解を受け、脱スケール処理が行われる。
このときストリップ16の表面が溶解するが、同時にH2等
のガスが発生する。このように今日行われている脱スケ
ールの問題の１つはストリップの上面に比べ下面の脱ス
ケールが十分に行われないことがあることである。その
原因は図１に示すように、電解によって発生した水素ガ
スなどが気泡としてストリップ下面にトラップされて電
解反応を阻害するためと考えられている。FIG. 1 is an explanatory view of the electrolytic descaling method. A stainless steel strip 16 is immediately annealed and then immediately immersed in a molten salt (mainly composed of NaOH and NaNO 3 ) and then, for example, as shown in FIG. While running in the pickling solution 10 in an electrolytic bath of a 15% HNO 3 solution at a temperature of 15 ° C., a descaling process is performed by receiving indirect energization alternating electrolysis by electrode pairs of an anode 12 and a cathode 14, respectively.
At this time, the surface of the strip 16 is dissolved, but at the same time, gas such as H 2 is generated. Thus, one of the problems with descaling practiced today is that the lower surface of the strip may not be sufficiently descaled relative to the upper surface. It is considered that the cause is that hydrogen gas or the like generated by electrolysis is trapped as bubbles in the lower surface of the strip to hinder the electrolysis reaction as shown in FIG.
【０００４】このための対策としては、例えば特開昭55
−122900号公報にはストリップの下面側に空気の気泡を
強制的に供給するステンレス鋼ストリップの電解酸洗に
おける気泡除去の方法と装置が提案されている。しかし
この方法はストリップの中央部が下面から見て凹の場合
にはかえって供給した空気がトラップされるという問題
がある。As a countermeasure for this, for example, JP-A-55
No. 122900 proposes a method and apparatus for removing bubbles in electrolytic pickling of a stainless steel strip forcibly supplying air bubbles to the lower surface of the strip. However, this method has a problem that the supplied air is rather trapped when the central portion of the strip is concave when viewed from the lower surface.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、電解
酸洗などの鋼ストリップの清浄化に際して発生した気泡
を効率的にストリップ下面より脱離除去してストリップ
の清浄化を均一に行うための装置を提供することであ
る。SUMMARY OF THE INVENTION An object of the present invention is to efficiently remove air bubbles generated during cleaning of a steel strip such as electrolytic pickling from the bottom surface of the strip to uniformly clean the strip. Is to provide the device.
【０００６】[0006]
【課題を解決するための手段】そこで、本発明者らが種
々検討を重ねた結果、ストリップの下面においてストリ
ップの幅方向に延在し、ストリップ下面に対向した側が
開いた開口部を備えた、横断面が円形の洗浄樋を設け、
該洗浄樋の上記開口部をノズル口として走行するストリ
ップと向流関係で流体を吹き付けるとともに、流体の流
れをストリップの幅方向において中心から両端部に向か
うようにすることにより、ストリップ下面にトラップさ
れるガスが効果的に除去されることを知り、本発明を完
成した。Therefore, as a result of various investigations by the present inventors, the strip has an opening which extends in the width direction of the strip on the lower surface of the strip and is open on the side facing the lower surface of the strip. Provide a cleaning gutter with a circular cross section,
The cleaning gutter is trapped on the lower surface of the strip by spraying the fluid in countercurrent with the strip running with the opening as the nozzle port and by directing the flow of the fluid from the center to both ends in the width direction of the strip. The inventors have completed the present invention by knowing that the gas is effectively removed.
【０００７】ここに、本発明の要旨とするところは、ス
トリップ下面に近接しかつストリップ幅方向に延在して
配置され、ストリップとの対向面にストリップの幅方向
に伸びた開口部を備えた円形横断面の洗浄樋と、該洗浄
樋の長手方向中央の位置において該洗浄樋の底近傍から
洗浄樋内部に開いた処理液供給管とから成り、前記開口
部が該処理液の噴出用のノズル口を構成し、好ましくは
さらに下記条件を満足する構成としたことを特徴とする
ストリップの洗浄装置である。 25度＜洗浄樋の開口角度ｋ＜180 度、 洗浄樋内径Ｈ＞２×処理液供給管内径Ｄ[0007] Here, the gist of the present invention is that it is arranged close to the lower surface of the strip and extends in the width direction of the strip, and has an opening extending in the width direction of the strip on the surface facing the strip. It consists of a cleaning gutter with a circular cross section, and a processing liquid supply pipe that opens from the vicinity of the bottom of the cleaning gutter to the inside of the cleaning gutter at a central position in the longitudinal direction of the cleaning gutter, and the opening is for jetting the processing liquid. It is a strip cleaning apparatus characterized in that it has a nozzle port and preferably further satisfies the following conditions. 25 degrees <opening angle k of cleaning gutter <180 degrees, inner diameter H of cleaning gutter> 2 x inner diameter D of processing liquid supply pipe
【０００８】[0008]
【作用】次に、本発明の作用について添付図面を参照し
ながら、詳細に説明する。図２は本発明にかかる洗浄装
置とストリップの位置関係を示す平面図であり、図３
は、図２のＡ−Ａ断面図である。図４は本発明にかかる
ストリップ洗浄装置をステンレス鋼ストリップの電解酸
洗ラインに設置した例の説明図である。Next, the operation of the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 is a plan view showing the positional relationship between the cleaning device and the strip according to the present invention, and FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 2. FIG. 4 is an explanatory view of an example in which the strip cleaning apparatus according to the present invention is installed in a stainless steel strip electrolytic pickling line.
【０００９】図示例において本発明にかかる洗浄装置は
洗浄樋44と処理液供給管42とから構成され、その洗浄樋
44はストリップ16の下面に近接させて、ストリップの走
行方向に対してほぼ直角に配置し、その長さはストリッ
プの幅Ｌより少々大きくしておくのがよい。In the illustrated example, the cleaning apparatus according to the present invention comprises a cleaning gutter 44 and a processing liquid supply pipe 42.
44 is arranged close to the lower surface of the strip 16 and at a substantially right angle to the traveling direction of the strip 16, and its length is preferably slightly larger than the width L of the strip.
【００１０】洗浄樋44の流体力学的な役割は、同じく図
示例では円形断面の処理液供給管42からの処理液をノズ
ル口を兼ねる開口部43から噴出させる噴流をストリップ
の幅まで扇状に広げ、渦流同志の衝突し合う湾曲した１
対の螺旋流の前線を作ることである。図中、処理液の流
れは矢印をもって示す。The hydrodynamic role of the cleaning gutter 44 is that the jet flow for ejecting the treatment liquid from the treatment liquid supply pipe 42 having a circular cross section through the opening portion 43 which also serves as a nozzle port is fan-shaped to the width of the strip in the example shown in the drawing. , A curved one in which eddy currents collide
To create the front of the twin spiral flow. In the figure, the flow of the treatment liquid is indicated by an arrow.
【００１１】処理液供給管42の洗浄樋への取り付け位置
は、洗浄樋44の長手方向の中央で、洗浄樋底近傍におい
て、好ましくは樋断面の接線方向にその吐出口が開くよ
うに設ける。これにより図３からも分かるように、処理
液は洗浄樋内部を内壁に沿って流れ、ノズル口を兼ねる
開口部43から接線方向に噴出される。図示例では処理液
供給管42はストリップとほぼ平行に水平に設けられてお
り、洗浄樋の底部においてその吐出口が洗浄樋内壁に沿
ってその接線方向に開いている。The treatment liquid supply pipe 42 is attached to the cleaning gutter at the center in the longitudinal direction of the cleaning gutter 44, near the bottom of the cleaning gutter, preferably so that its discharge port opens in the tangential direction of the gutter section. As a result, as can be seen from FIG. 3, the processing liquid flows inside the cleaning gutter along the inner wall and is ejected tangentially from the opening 43 which also serves as the nozzle port. In the illustrated example, the treatment liquid supply pipe 42 is horizontally provided substantially parallel to the strip, and its discharge port is opened along the inner wall of the cleaning gutter in the tangential direction at the bottom of the cleaning gutter.
【００１２】このとき開口部43からの処理液の噴出方向
は、ストリップ16の走行方向に対して向流方向となるよ
うにされるが、そのためには処理液供給管42を洗浄樋44
に対して上流側から取り付ける。At this time, the jetting direction of the processing liquid from the opening 43 is made countercurrent to the running direction of the strip 16. For that purpose, the processing liquid supply pipe 42 is washed with a cleaning gutter 44.
Install from the upstream side.
【００１３】洗浄樋44はストリップ16に向かって角度ｋ
で開口する。そして開口部43は走行するストリップを迎
える側Ｍではその端面形状がストリップと平行に、送る
側Ｎではそれをストリップと直角となるように成形する
のが好ましい。The flush gutter 44 is angled k towards the strip 16.
Open with. It is preferable that the opening 43 is formed such that its end face shape is parallel to the strip on the side M which faces the traveling strip, and is perpendicular to the strip on the feed side N.
【００１４】こうすることにより供給管42から洗浄樋内
に吹き込まれた処理液46は、断面図でみれば、図３に示
すように洗浄樋44の内壁に沿いつつ、反転し (矢印48参
照)、ストリップ16の下面に吹き付けられ( 矢印50参照)
、その先端は走行するストリップ16に同伴する流れ58
と領域Ｂにおいて衝突し、２つの渦56、64を生ずる。In this way, the processing liquid 46 blown from the supply pipe 42 into the cleaning gutter is reversed while being along the inner wall of the cleaning gutter 44 as shown in FIG. 3 (see arrow 48). ), Sprayed on the underside of strip 16 (see arrow 50)
, The tip of which flows with the traveling strip 16 58
Collide with each other in the region B, and two vortices 56 and 64 are generated.
【００１５】これを平面で見れば、図２に示すように処
理液46は洗浄樋44の内曲面に沿って反転する過程で扇形
に広がり( 矢印48, 50参照) 、その先端52はストリップ
の同伴流60と衝突して１対の渦流56, 64を生じ、領域Ｆ
ＢＥにおいて湾曲した前線を形づくる。そしてそのよう
な渦流は湾曲した前線に沿ってストリップ中央側からス
トリップ縁部に向かって流れていく。従って渦流56、64
は渦巻きながらストリップ縁部に流下する１対の螺旋流
になっている。When viewed in plan, the treatment liquid 46 spreads in a fan shape along the inner curved surface of the cleaning gutter 44 (see arrows 48 and 50) as shown in FIG. It collides with the entrained flow 60 to generate a pair of vortices 56 and 64, and the region F
Form a curved front at BE. Then, such an eddy current flows along the curved front from the strip center side toward the strip edge. Therefore, eddies 56, 64
Is a pair of spiral flows that flow down to the edge of the strip while swirling.
【００１６】走行するストリップ下面に付着した気泡は
この領域ＦＢＥに至ると強烈な渦流により攪乱洗浄され
て鋼板から離脱し、図２の線Ａ−Ａより上半分ではスト
リップ下面を湾曲し螺旋流によって領域ＢＦに沿ってス
トリップの縁外まで運ばれる。図２の線Ａ−Ａより下半
分では同じくストリップ下面の領域ＢＥに沿って気泡は
ストリップの縁外まで運ばれる。When the bubbles adhering to the lower surface of the running strip reach this region FBE, they are disturbed and washed away by the intense vortex flow and separate from the steel plate. In the upper half of the line AA in FIG. It is carried along the area BF to the outside of the edge of the strip. In the lower half of the line AA in FIG. 2, the bubbles are also carried to the outside of the edge of the strip along the area BE on the lower surface of the strip.
【００１７】このようにしてストリップの縁外に出た気
泡はその後処理槽液面まで浮上して処理液外に分離さ
れ、排気装置により処理される。このような作用を発揮
する本発明装置においては処理液噴流を運動エネルギー
の損失を極力抑えて反転しつつストリップ幅まで十分に
扇状に広げることが実用上は重要なポイントであり、そ
のための洗浄樋の寸法要件については流体模型試験を行
って最適な範囲を求めた。The air bubbles thus ejected to the outside of the edge of the strip are subsequently floated up to the surface of the processing tank, separated from the outside of the processing solution, and processed by the exhaust device. In the apparatus of the present invention which exhibits such an action, it is an important point for practical use that the processing liquid jet is sufficiently fanned to the strip width while being inverted while suppressing the loss of kinetic energy as much as possible, and a cleaning gutter for that purpose. For the dimensional requirements of, the fluid model test was conducted to find the optimum range.
【００１８】すなわち、洗浄樋の上面に形成される開口
部の開口角度ｋは噴流の反転と洗浄樋からのスムースな
流出に影響を及ぼす。ｋ＞180 度では噴流の反転が不十
分で鋼帯に衝突したとき走行方向に分かれる割合が多く
なる。またｋ＜25度では開口が狭く洗浄樋からの噴流の
流出が阻害される。好ましくはこの開口角度は30〜90度
である。That is, the opening angle k of the opening formed on the upper surface of the cleaning gutter affects the reversal of the jet flow and the smooth outflow from the cleaning gutter. When k> 180 degrees, the reversal of the jet flow is insufficient, and when the steel strip collides with the steel strip, the ratio of splitting in the traveling direction increases. Further, when k <25 degrees, the opening is narrow and the outflow of the jet from the cleaning gutter is obstructed. Preferably this opening angle is between 30 and 90 degrees.
【００１９】洗浄樋の内径Ｈは噴流の扇状の広がりの状
況に影響する。ＨがＤに比べ小さいと噴流は洗浄樋に衝
突する状態になり、平面図でみた場合、流れは洗浄樋の
長手方向に上下２方向に分かれ、ストリップを洗浄する
成分は弱くなる。洗浄樋内径Ｈ＞２×処理液供給管内径
Ｄが必要である。The inner diameter H of the cleaning gutter affects the fan-like spread of the jet. When H is smaller than D, the jet collides with the cleaning gutter, and when viewed in plan, the flow is divided into two directions, up and down, in the longitudinal direction of the cleaning gutter, and the component for cleaning the strip becomes weak. Cleaning gutter inner diameter H> 2 × processing liquid supply pipe inner diameter D is required.
【００２０】処理液噴出流量をしだいに減少させていく
と、反転扇形流とストリップの同伴流とが衝突する前線
の領域ＦＢＥはしだいに洗浄樋側に後退し、しまいに洗
浄樋の位置を越えてしまう。そうすると気泡除去ができ
なくなる。前線が湾曲しているためストリップの縁部か
ら先にこの現象が起こる。このようにストリップ全幅最
適な気泡除去条件を得るための処理液噴出流量はライン
速度に応じた限界値があり、これはあらかじめ流体試験
により求めておく。When the flow rate of the processing liquid jet is gradually reduced, the front region FBE where the reversing fan flow collides with the entrained flow of the strip gradually recedes to the cleaning gutter side, and finally exceeds the position of the cleaning gutter. Will end up. In that case, bubbles cannot be removed. This phenomenon occurs from the edge of the strip first due to the curved front. As described above, there is a limit value for the jetting flow rate of the processing liquid for obtaining the optimum bubble removal condition for the entire strip width, which is determined in advance by a fluid test.
【００２１】[0021]
（実施例１）本例では、ステンレス鋼ストリップの電解
酸洗におけるストリップ下面に付着した気泡の除去洗浄
を図２および３の装置を使って行った。(Example 1) In this example, cleaning and removal of bubbles adhering to the lower surface of the stainless steel strip during electrolytic pickling were performed using the apparatus shown in Figs.
【００２２】本発明にかかる洗浄装置の配置は図４に示
すように、陽極12、陰極14の両電極対の間において洗浄
樋44がストリップ16の幅方向に延在するようにし、処理
液供給管42はその上流側に取り付け、供給液が洗浄樋の
内壁に沿って吐出されるようにした。As shown in FIG. 4, the arrangement of the cleaning device according to the present invention is such that the cleaning gutter 44 extends in the width direction of the strip 16 between the electrode pair of the anode 12 and the cathode 14, and the processing liquid is supplied. The pipe 42 was attached on the upstream side so that the supply liquid was discharged along the inner wall of the cleaning gutter.
【００２３】本例では、上記態様において下記の寸法の
本発明にかかる洗浄装置を用いてストリップ下面に付着
した気泡を洗浄除去するために必要な処理液噴出流量と
ライン速度の関係を求めた。In this example, the relationship between the jetting flow rate of the processing liquid and the line speed required for cleaning and removing the air bubbles adhering to the lower surface of the strip was obtained by using the cleaning apparatus according to the present invention having the following dimensions in the above embodiment.
【００２４】気泡除去の可否を判定するために処理槽の
側面を一部ガラス窓とし目視観察を行った。ストリップ
幅中央部は流れが強く当たるため気泡も除去されやすい
が、ストリップの縁辺は流れが弱まるため中央部に比べ
除去されにくい傾向がある。ここではストリップの端か
ら端まで全幅で完全に気泡が除去される条件における流
量とライン速度の関係を求めた。結果を図５にグラフで
示す。In order to determine whether or not to remove bubbles, the side surface of the treatment tank was partially made into a glass window and visually observed. Bubbles are likely to be removed at the central portion of the strip width due to the strong flow, but the edges of the strip tend to be more difficult to be removed than at the central portion because the flow weakens. Here, the relationship between the flow rate and the line speed under the condition that bubbles are completely removed over the entire width of the strip was obtained. The results are shown graphically in FIG.
【００２５】 （実施例２）本例では、実施例１でその気泡除去効果を
確認した構造を備えた本発明にかかる洗浄装置を実際の
電解酸洗ラインに適用して電解洗浄試験を行った。[0025] (Embodiment 2) In this embodiment, an electrolytic cleaning test was conducted by applying the cleaning apparatus according to the present invention having the structure of which the bubble removing effect was confirmed in Example 1 to an actual electrolytic pickling line.
【００２６】すなわち、フェライト系ステンレス鋼であ
るJIS SUS430鋼の冷間圧延後のストリップ (板厚0.5 m
m、板幅300 mm) を830 ℃で焼鈍後、直ちに溶融塩 (主
成分NaOH、NaNO3)に浸漬し、引き続いて図４に示すよう
な電解酸洗装置により、50℃、15％HNO3中で間接通電交
番電解酸洗を行った。That is, JIS SUS430 steel, which is a ferritic stainless steel, is stripped after cold rolling (plate thickness 0.5 m
m, plate width 300 mm) was annealed at 830 ℃, immediately immersed in molten salt (main components NaOH, NaNO 3 ), and then 50 ℃, 15% HNO 3 with an electrolytic pickling device as shown in Fig. 4. Indirect energization alternating electrolytic pickling was performed therein.
【００２７】その際に、図４に示すように、ストリップ
下面側に図２、３に示す本発明にかかる洗浄装置を配置
することにより発生したH2、O2、NO2 をストリップ下面
から離脱、除去する試験を行った。At this time, as shown in FIG. 4, H 2 , O 2 and NO 2 generated by disposing the cleaning device according to the present invention shown in FIGS. 2 and 3 on the lower surface side of the strip are separated from the lower surface of the strip. , A test for removal was performed.
【００２８】ライン速度および処理液噴出流量は図５の
結果をもとに、 ライン速度 50 m/min 処理液噴出流量 Ｑ＝2.0 ×２ (m3/h) とした。Based on the results shown in FIG. 5, the line velocity and the flow rate of the treatment liquid were set to 50 m / min, and the flow rate of the treatment liquid was Q = 2.0 × 2 (m 3 / h).
【００２９】次に、HNO3中での電解酸洗後に水洗、乾燥
したストリップより試験片を切り出し、スポットテスト
により、酸洗時のストリップ下面の表面のCr濃度を調べ
た。ここに、スポットテストは、次のような要領で行う
試験である。Next, a test piece was cut out from the strip that was electrolytically pickled in HNO 3 , washed with water and dried, and the Cr concentration on the lower surface of the strip during pickling was examined by a spot test. Here, the spot test is a test performed in the following manner.
【００３０】腐食性試験溶液(FeCl3・6H2O 10g, NaCl 5
g,36%HCl 2.5ml, H2O 200 ml) を１滴試験面に滴下して
５分間保持した後水洗し、生じた腐食斑点濃さを標準試
料 (Cr含有率12, 13, 14, 15および16％) と見比べなが
らCr濃度を判定した。Cr濃度の変動が少ないほど酸洗が
均一に行われた、つまり気泡の除去が効果的に行われた
ことを意味する。Corrosion test solution (FeCl 3 .6H 2 O 10 g, NaCl 5
g, 36% HCl 2.5 ml, H 2 O 200 ml) was dropped on the test surface, held for 5 minutes and washed with water, and the resulting corrosion spot darkness was used as a standard sample (Cr content 12, 13, 14, 14. (15 and 16%), and the Cr concentration was judged. The smaller the fluctuation of the Cr concentration, the more uniform the pickling was, that is, the more effective the removal of bubbles.
【００３１】なお、上述の試験はストリップの板幅方向
に３点、ライン方向に３点の合計９点で実施した。本発
明例および気泡除去を全く行わない従来例の各場合の試
験結果を比較し、表１に示す。The above-mentioned test was conducted at a total of 9 points, 3 points in the strip width direction and 3 points in the line direction. Table 1 compares the test results of the present invention example and the conventional example in which no bubble removal is performed at all.
【００３２】[0032]
【表１】 [Table 1]
【００３３】[0033]
【発明の効果】洗浄樋やスリットノズルなどの気泡離脱
を全く行わない場合は、脱スケールが不十分なため、ス
ポットテストにより、表面のCr濃度の低い部分が多く認
められるが、本発明による洗浄装置を用いたものはCr濃
度の低い部分は少なくなり、満足すべき効果が得られる
ことが分かり、これまで何かと問題の多かった酸洗がよ
り均一にできることから、本発明の実際上の意義は大き
い。[Effects of the Invention] When no bubbles are removed from the cleaning gutter or slit nozzle, descaling is insufficient, so many spots with a low Cr concentration on the surface are recognized by the spot test. It can be seen that the one using the apparatus has a low Cr concentration part and a satisfactory effect can be obtained, and the pickling which has been problematic until now can be made more uniform, so that the practical significance of the present invention is large.
【図１】従来の電解酸洗ラインで電解により生成した気
泡の成長の様子を示す説明図である。FIG. 1 is an explanatory diagram showing the growth of bubbles generated by electrolysis in a conventional electrolytic pickling line.
【図２】本発明にかかる洗浄装置とストリップの位置関
係を示す平面図である。FIG. 2 is a plan view showing a positional relationship between a cleaning device and a strip according to the present invention.
【図３】本発明にかかる洗浄装置を示す図２のＡ−Ａ断
面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2 showing the cleaning device according to the present invention.
【図４】本発明にかかる洗浄装置を設置する電解酸洗ラ
インの説明図である。FIG. 4 is an explanatory view of an electrolytic pickling line in which a cleaning device according to the present invention is installed.
【図５】本発明の、鋼帯下面から完全に気泡を除去する
条件における液噴出流量とライン速度の関係を示す図で
ある。FIG. 5 is a diagram showing the relationship between the liquid ejection flow rate and the line speed under the condition of completely removing bubbles from the lower surface of the steel strip according to the present invention.
10：酸洗液 12：陽極 14：陰極 16：ス
トリップ 22：気泡 42：洗浄液噴出ノズル 44：洗
浄樋10: Pickling solution 12: Anode 14: Cathode 16: Strip 22: Bubble 42: Cleaning solution jet nozzle 44: Cleaning gutter
Claims (2)
幅方向に延在して配置され、ストリップとの対向面にス
トリップの幅方向に伸びた開口部を備えた円形横断面の
洗浄樋と、該洗浄樋の長手方向中央の位置において該洗
浄樋の底近傍から洗浄樋内部に開いた処理液供給管とか
ら成り、前記開口部が該処理液の噴出用のノズル口を構
成することを特徴とするストリップの洗浄装置。1. A cleaning gutter having a circular cross section, which is arranged close to the lower surface of the strip and extends in the width direction of the strip and has an opening extending in the width direction of the strip on a surface facing the strip, and the cleaning gutter. It is characterized in that it comprises a processing liquid supply pipe opened from the vicinity of the bottom of the cleaning gutter to the inside of the cleaning gutter at a position at the center in the longitudinal direction of the gutter, and the opening constitutes a nozzle port for ejecting the processing liquid. Strip cleaning equipment.
求項１記載のストリップ洗浄装置。 25度＜洗浄樋の開口角度ｋ＜180 度、 洗浄樋内径Ｈ＞２×処理液供給管内径Ｄ2. The strip cleaning apparatus according to claim 1, further configured to satisfy the following conditions. 25 degrees <opening angle k of cleaning gutter <180 degrees, inner diameter H of cleaning gutter> 2 x inner diameter D of processing liquid supply pipe
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21364795A JPH0959800A (en) | 1995-08-22 | 1995-08-22 | Strip cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21364795A JPH0959800A (en) | 1995-08-22 | 1995-08-22 | Strip cleaning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0959800A true JPH0959800A (en) | 1997-03-04 |
Family
ID=16642627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21364795A Withdrawn JPH0959800A (en) | 1995-08-22 | 1995-08-22 | Strip cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0959800A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI460781B (en) * | 2012-03-08 | 2014-11-11 |
-
1995
- 1995-08-22 JP JP21364795A patent/JPH0959800A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI460781B (en) * | 2012-03-08 | 2014-11-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20021105 |