JPH0379796A - Method and equipment for continuously annealing and pickling stainless steel strip - Google Patents
Method and equipment for continuously annealing and pickling stainless steel stripInfo
- Publication number
- JPH0379796A JPH0379796A JP21507089A JP21507089A JPH0379796A JP H0379796 A JPH0379796 A JP H0379796A JP 21507089 A JP21507089 A JP 21507089A JP 21507089 A JP21507089 A JP 21507089A JP H0379796 A JPH0379796 A JP H0379796A
- Authority
- JP
- Japan
- Prior art keywords
- pickling
- stainless steel
- steel strip
- sulfuric acid
- equipment
- 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.)
- Pending
Links
- 238000005554 pickling Methods 0.000 title claims abstract description 60
- 238000000137 annealing Methods 0.000 title claims abstract description 36
- 239000010935 stainless steel Substances 0.000 title claims abstract description 27
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 abstract description 3
- 235000021110 pickles Nutrition 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 7
- 239000010425 asbestos Substances 0.000 description 5
- 229910052895 riebeckite Inorganic materials 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、ステンレス鋼４ｉＦの連続焼鈍・酸洗方法
及びその設備に関し、特にステンレス鋼４ｉＦの連続焼
鈍・酸洗処理能力の有利な向上を、処理ラインの効果的
な短縮化に併せ、実現しようとするものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for continuous annealing and pickling of stainless steel 4iF and its equipment, and particularly to an advantageous improvement in the continuous annealing and pickling processing ability of stainless steel 4iF. This is what we are trying to achieve in conjunction with the effective shortening of the processing line.
〈従来の技術〉
冷間圧延後のステンレス調相は、一般に連続焼鈍・酸洗
設Ｏｉ（＾ｎｅａｌｉｎｇａｎｄ ｌ’ｉｃｋｌｉｎｇ
Ｌｉｎｅ ：八Ｐ Ｌ ）によって連続的な焼鈍酸洗
処理が施される。<Prior art> Stainless steel after cold rolling is generally modified by continuous annealing and pickling.
Continuous annealing and pickling treatment is performed by Line: 8P L ).
ステンレス鋼帯の連続焼鈍においては、５ＵＳ３０４の
如きオーステナイト系で１０１０〜１１５０°Ｃと非常
に高温にしなければならないため、生産性や保全性など
の点から、加熱手段として、背通鋼の場合に一般に使用
されている間接加熱タイプではなく、直火式が採用され
ている。In continuous annealing of stainless steel strips, austenitic steel such as 5US304 must be heated to a very high temperature of 1010 to 1150°C, so from the viewpoint of productivity and maintainability, it is recommended to use back-threaded steel as a heating means. A direct flame type is used instead of the commonly used indirect heating type.
しかしながら、かかる直火式の加熱方式では、鋼帯表面
に酸化皮膜が生成するため、焼鈍後、酸洗による脱スケ
ールが不可欠である。However, in such a direct heating method, an oxide film is formed on the surface of the steel strip, so descaling by pickling is essential after annealing.
ステンレス鋼の生成する酸化皮膜は、普通鋼のそれと比
べるとはるかに緻密、強固であり、しかもかかる緻密化
傾向は、炉内０８濃度が零に近づくほど高まることから
、従来は、後段の酸洗工程における脱スケール処理を容
易にするため、炉内雰囲気は０．濃度：２〜３％程度の
酸化性雰囲気とされていた。The oxide film formed on stainless steel is much denser and stronger than that on ordinary steel, and this tendency to densify increases as the 08 concentration in the furnace approaches zero. In order to facilitate the descaling process in the process, the atmosphere inside the furnace is kept at 0. It was assumed to be an oxidizing atmosphere with a concentration of about 2 to 3%.
従って、スケール生成量が多く、この酸化スケールがハ
ースロールに付着、更に成長してステンレス鋼帯にいわ
ゆるピックアップ班を発生させる。Therefore, a large amount of scale is generated, and this oxidized scale adheres to the hearth roll and further grows, causing so-called pickup spots on the stainless steel strip.
このピックアップ班を防止するために、ハースロールを
アスベスト製ロールとし、しかもロール本数を極力少な
くしてステンレス鋼帯をカテナリー支持している方法を
とる（特公昭５２−２６７２３号公報）。In order to prevent this pickup group, a method is adopted in which the hearth roll is made of asbestos, the number of rolls is minimized, and the stainless steel strip is catenary supported (Japanese Patent Publication No. 52-26723).
また、酸洗処理は脱スケール及び不動態化処理が施され
、従来は、中性塩電解、硝Ｎｔ電解、硝酸及び揃弗酸な
どを組み合わせて行われていた。In addition, the pickling treatment includes descaling and passivation treatment, and conventionally, it has been carried out using a combination of neutral salt electrolysis, nitrate-Nt electrolysis, nitric acid, hydrofluoric acid, and the like.
〈発明が解決しようとする課題〉
しかしながら、上に述べた従来の連続焼鈍・酸洗設備に
おいては、処理ラインが非常に長大なものとなり、しか
もその反面生産能力はさほど高くないというところに問
題を残していた。<Problem to be solved by the invention> However, the problem with the conventional continuous annealing/pickling equipment described above is that the processing line is extremely long and, on the other hand, the production capacity is not very high. I had left it behind.
例えば、１５Ｔ／Ｉｆの生産能力を出すためには、約４
５ｍのカテナリー型直火炉と約５０ｍの酸洗槽、従って
、少なくとも約１００ｍに及ぶ長大な設備を必要として
いた。For example, in order to produce a production capacity of 15T/If, approximately 4
This required a 5m catenary-type direct-fired furnace and an approximately 50m pickling tank, thus requiring a long facility extending at least approximately 100m.
また、炉内のアスベストロールは、ピックアップ疵の発
生を回避するために、１〜２回／月程度の交換を必要と
していた。In addition, the asbestos roll in the furnace needed to be replaced about once or twice a month in order to avoid the occurrence of pick-up defects.
さらに、酸洗部においては、長大な酸洗槽と共に、液種
の異なる各酸洗槽ごとに給酸、循環装置などの付帯設備
を必要としていた。Furthermore, the pickling section requires not only a long pickling tank but also ancillary equipment such as acid supply and circulation equipment for each pickling tank with a different type of liquid.
また、環境衛生上、排気処理設備、廃酸処理設備なども
必要とし、多岐に渡る設備のメンテナンスが極めて厄介
であった。In addition, for environmental hygiene reasons, exhaust treatment equipment, waste acid treatment equipment, etc. are also required, making maintenance of the various equipment extremely troublesome.
本発明は、上記の諸問題を有利に解決するもので、生産
性に富むステンレス鋼帯の連続焼鈍・酸洗方法を、コン
パクトでしかもメンテナンスが容易な設備と共に提案す
ることを目的とする。The present invention advantageously solves the above-mentioned problems, and aims to propose a highly productive continuous annealing and pickling method for stainless steel strips, together with equipment that is compact and easy to maintain.
〈課題を解決するための手段〉
第１の発明は、ｔｌＩｌ帯を、加熱帯から冷却１Ｆまで
順次に搬送する間に所定の熱処理を施す連続焼鈍設備及
び酸洗設備によってステンレス鋼帯に焼鈍処理と酸洗処
理とを連続して施すに当たり、還元性雰囲気下に間接加
熱による焼鈍を施すと共に、引き続く酸洗を少なくとも
高濃度の硫酸水溶液を電解液として使用する電解酸洗に
よって行うことを特徴とするステンレス鋼’＋ＩＦの連
続焼鈍・酸洗方法である。<Means for Solving the Problems> The first invention provides annealing treatment to a stainless steel strip using continuous annealing equipment and pickling equipment that perform predetermined heat treatment while sequentially transporting the tlIl strip from the heating zone to the cooling 1F. In sequentially performing the pickling treatment, annealing is performed by indirect heating in a reducing atmosphere, and the subsequent pickling is performed at least by electrolytic pickling using a highly concentrated sulfuric acid aqueous solution as an electrolyte. This is a continuous annealing/pickling method for stainless steel '+IF.
また、第２の発明は、加熱４１）、冷却帯を有する連続
焼鈍炉と酸洗設備とを併せ備えたステンレス鋼帯の連続
焼鈍・酸洗設備において、上記焼鈍炉の各ＩＰ域が主と
して竪型炉からなり、かつ加熱帯が還元性雰囲気下に間
接加熱を施すように構成されており、上記酸洗設備が少
なくとも高濃度の硫酸水溶液を電解液として使用する電
解酸洗槽を有することを特徴とするステンレス鋼帯の連
続焼鈍・酸洗設備である。Further, the second invention provides continuous annealing/pickling equipment for stainless steel strips, which is equipped with a continuous annealing furnace having a heating 41) and cooling zone, and a pickling equipment, in which each IP area of the annealing furnace is mainly vertical. The pickling equipment consists of a mold furnace, and the heating zone is configured to perform indirect heating in a reducing atmosphere, and the pickling equipment has at least an electrolytic pickling tank that uses a highly concentrated sulfuric acid aqueous solution as an electrolyte. This is a continuous annealing and pickling equipment for stainless steel strips.
〈作 用〉
本発明では、焼鈍炉の各帯域を主として竪型炉として構
成しているので、炉の上下には多数のハースロールが配
置されて、ステンレス鋼４１Ｆはこれらのハースロール
に順次巻き付けられて熱処理を施されるが、炉内は還元
性雰囲気に保持され、ラジアントチューブなどによる間
接加熱を行うので、炉内で酸化スケールが発生ずること
は殆どなく、従って、このように多数のハースロールを
使用しても酸化スケールのロールへの付着成長に起因し
たピックアップ疵の発生のおそれは殆どなく、また、そ
の後の酸洗処理は、高濃度の硅酸電解処理だけで充分で
ある。<Function> In the present invention, each zone of the annealing furnace is configured mainly as a vertical furnace, so a large number of hearth rolls are arranged above and below the furnace, and the stainless steel 41F is sequentially wound around these hearth rolls. However, since the inside of the furnace is maintained in a reducing atmosphere and indirect heating is performed using radiant tubes, there is almost no oxidation scale generated inside the furnace. Even when a roll is used, there is almost no risk of pick-up flaws due to the adhesion and growth of oxide scale on the roll, and as for the subsequent pickling treatment, only high-concentration silicic acid electrolytic treatment is sufficient.
〈実施例〉
第１図に、本発明に従うステンレス鋼帯の連続焼鈍・酸
洗設備の好適例を模式的に示す。この例は、焼鈍炉の各
４ＩＦ域とも竪型炉で構成した場合である０図中番号ｌ
は予熱４＋Ｆ、２は加熱帯、３は均熱（「、４は冷却帯
、５は最終冷却装置であり、６は硫酸槽、７は硫酸電解
酸洗槽である。なお、８はスプレーやブラシ、スクラバ
ーなどからなる？ｎ浄装置、９はドライヤーである。<Example> FIG. 1 schematically shows a preferred example of continuous annealing/pickling equipment for stainless steel strip according to the present invention. In this example, each of the 4 IF areas of the annealing furnace is configured with a vertical furnace.
is preheating 4+F, 2 is heating zone, 3 is soaking (4 is cooling zone, 5 is final cooling device, 6 is sulfuric acid tank, 7 is sulfuric acid electrolytic pickling tank. 8 is spray or A cleaning device consisting of a brush, a scrubber, etc. 9 is a dryer.
さて、上記の好適例では、焼鈍炉の各帯域をいずれも竪
型炉として槽底しているので、炉の上下ニハ多数のハー
スロールが配置されて、ステンレス鋼帯Ｓはこれらのハ
ースロールに順次巻き付けられて熱処理を施されること
になるが、炉内は！１２とＮ２などの還元性雰囲気に保
持され、ラジアントチューブなどによる間接加熱を行う
ので、炉内で酸化スケールが発生することは殆どなく、
従ってこのように多数のハースロールを使用しても酸化
スケールのロールへの付着成長に起因したピックアップ
疵の発生のおそれは殆どない、なお、雰囲気ガスとして
はＨ！＝３〜１５％、Ｎ１残が適当である。Now, in the above preferred example, each zone of the annealing furnace is a vertical furnace with the bottom of the tank, so a large number of hearth rolls are arranged above and below the furnace, and the stainless steel strip S is attached to these hearth rolls. It will be wrapped one after another and heat treated, but inside the furnace! Since the furnace is kept in a reducing atmosphere such as 12 and N2, and indirect heating is performed using a radiant tube, there is almost no oxidation scale generated in the furnace.
Therefore, even when such a large number of hearth rolls are used, there is almost no risk of pick-up defects caused by oxide scale adhesion and growth on the rolls.In addition, the atmospheric gas is H! =3 to 15%, N1 remaining is appropriate.
また、炉内は主として竪型炉であるため、ステンレス鋼
帯の炉内通過長さを大きくとることができ、従来の直火
式加熱から間接式加熱への変更というマイナス要因をは
るかに上回って、通板速度すなわち生産性を著しく向上
できるのみならず、炉長を大幅に短縮できる。また、従
来のように、アスベストロールのような高価なロールを
あえて使用する必要はない。In addition, since the furnace is mainly a vertical furnace, the passage length of the stainless steel strip through the furnace can be increased, which far outweighs the negative factor of changing from conventional direct heating to indirect heating. , it is possible not only to significantly improve the sheet passing speed, that is, productivity, but also to significantly shorten the furnace length. Further, there is no need to use expensive rolls such as asbestos rolls as in the past.
なお、第１図に示す好適例において、特に前記の問題が
発生しやすい加熱帯中の高温部については、−１バス炉
を横型とし、従来通りアスベスト製ハースロールによる
カテナリー支持タイプを採用しても勿論よいが、鋼帯を
気体浮揚装置により非接触状態でのカテナリータイプを
採用してもよい。Furthermore, in the preferred example shown in Fig. 1, for the high-temperature part in the heating zone where the above-mentioned problem is particularly likely to occur, the -1 bath furnace is made horizontal, and a catenary support type using asbestos hearth rolls is adopted as in the past. Of course, a catenary type may also be used in which the steel strip is placed in a non-contact state using a gas flotation device.
後者のタイプが本発明においてはより有効である。The latter type is more effective in the present invention.
次に第２図に、第１図の焼鈍設備により焼鈍処理を施し
たステンレス鋼帯を、硫酸電解により酸洗処理した場合
の所要時間と電流密度との関係について調べた結果の一
例を実線で示す、５ＵＳ４３０では、硫酸濃度９００
ｇ ／ ｆｆｉ、液温５０°Ｃの硫酸水溶液を用い、一
方５ＵＳ３０４では、硫酸濃度１２５０ｇ／Ｉｔ、液温
５５℃の硅酸水溶液を用いた。第２図において、各曲線
の−Ｅ方が酸洗良好域であり、一方下方ば酸洗不足域で
ある。Next, Figure 2 shows an example of the results of an investigation into the relationship between the required time and current density when a stainless steel strip annealed using the annealing equipment shown in Figure 1 is pickled using sulfuric acid electrolysis, as indicated by the solid line. In 5US430, the sulfuric acid concentration is 900
g/ffi and a sulfuric acid aqueous solution with a liquid temperature of 50°C, while in 5US304, a silicic acid aqueous solution with a sulfuric acid concentration of 1250 g/It and a liquid temperature of 55°C was used. In FIG. 2, the -E side of each curve is a good pickling area, while the lower side is an insufficient pickling area.
第２図から明らかなように、ｆｉ電流密度比較的高い場
合には２〜３秒で、また電流密度が低い場合でも１０〜
２０秒で酸洗処理可能である。As is clear from Fig. 2, when fi current density is relatively high, it takes 2 to 3 seconds, and even when current density is low, it takes 10 to 3 seconds.
Pickling treatment is possible in 20 seconds.
また、−点鎖線は濃度２００ ｇ ／ ｆ 、液温７０
″Ｃの硫酸水溶液に１０秒浸清させた後に、上述の高濃
度硫酸で電解酸洗を行った場合の７ｆｌ流密度と酸洗時
間との関係を示したものであり、その効果がはっきり表
れることがわかる。すなわち、高濃度硫酸を用いた電解
酸洗の前に硫酸等による浸漬を１テうことにより、電解
酸洗時間を短縮することができ、電極長を短くすること
ができる。In addition, the - dotted chain line indicates a concentration of 200 g/f and a liquid temperature of 70 g/f.
This shows the relationship between the 7 fl flow density and the pickling time when electrolytic pickling is performed with the above-mentioned high concentration sulfuric acid after immersion in the sulfuric acid aqueous solution of "C" for 10 seconds, and the effect is clearly visible. That is, by performing one immersion in sulfuric acid or the like before electrolytic pickling using high concentration sulfuric acid, the electrolytic pickling time can be shortened and the electrode length can be shortened.
次に、第３図に、濃度１０００ ｇ ／ ｆの高濃度硫
酸の場合において良好な酸洗を達威し得る電流密度と液
温との関係について調べた結果を示す、なお、電解時間
はいずれも３秒間とした。第３図より、電流密度を低め
にしたい場合には、液温を上刃させることが酸洗性向上
に有効であることがわかる。Next, Figure 3 shows the results of an investigation into the relationship between current density and liquid temperature that can achieve good pickling in the case of highly concentrated sulfuric acid with a concentration of 1000 g/f. The duration was also set to 3 seconds. From FIG. 3, it can be seen that when it is desired to lower the current density, increasing the liquid temperature is effective in improving the pickling performance.
勿論、さらに高濃度硫酸電解酸洗における酸洗時の電流
密度を下げたい場合には、第２図に一点鎖線で示したよ
うに、別の酸洗と組み合わせることが有効である。Of course, if it is desired to further lower the current density during pickling in high-concentration sulfuric acid electrolytic pickling, it is effective to combine it with another pickling, as shown by the dashed line in FIG.
なお、上述したように本発明では、連続焼鈍を還元性雰
囲気中で行うので、その後の酸洗処理は高濃度′Ｐｉ酸
電解酸洗だけでも充分である。Note that, as described above, in the present invention, continuous annealing is performed in a reducing atmosphere, and therefore, electrolytic pickling with high-concentration Pi acid is sufficient as the subsequent pickling treatment.
さらに、以上述べたことから明らかなように、本発明に
よる焼鈍炉は一般冷延鋼帯用としてもそのまま使用する
ことができるので、ステンレス鋼帯と一般澗帯の兼用ラ
インとして大きな威力を発揮する。Furthermore, as is clear from the above, the annealing furnace of the present invention can be used as is for general cold-rolled steel strips, so it is very effective as a line that can be used for both stainless steel strips and general cold-rolled steel strips. .
〈発明の効果〉 この発明の効果は、次のとおりに要約される。<Effect of the invention> The effects of this invention can be summarized as follows.
（１）処理能力が格段に向上すると共に、設備長さを大
幅に短縮できる。(1) Processing capacity is significantly improved and equipment length can be significantly shortened.
（２）焼鈍炉の炉内雰囲気を還元性雰囲気にすると共に
、特に加熱帯中の高温帯域を非接触状態とすることによ
り、ピックアップ班の発生を皆無にすることができる。(2) By making the atmosphere inside the annealing furnace a reducing atmosphere and by making the high-temperature zone in the heating zone in a non-contact state, it is possible to completely eliminate the occurrence of pick-up groups.
（３）アスベストロールを使用する必要がないので、ロ
ール交換作業が不要となり、コスト削減となる。(3) Since there is no need to use asbestos rolls, there is no need to replace rolls, resulting in cost reduction.
（４） 酸化スケールがほとんどなくなるので、スケ
ールロスによる歩留りの低下を防止できる。(4) Since almost no oxide scale is present, a decrease in yield due to scale loss can be prevented.
（５）酸洗槽が少なくて済むので、薬液管理が容易であ
り、また、給酸、廃酸、Ｉ環設側などの付帯設備を大幅
に削減できる。(5) Since the number of pickling tanks is small, chemical management is easy, and additional equipment such as acid supply, waste acid, and I ring installation can be significantly reduced.
第１図は本発明によるステンレス鋼帯の連続焼鈍・酸洗
設備の模式図、第２図は本発明による高濃度硫酸電解酸
洗処理における処理時間と電流密度との関係を示したグ
ラフ、第３図は高濃度硫酸電解酸洗における電流密度と
液温との関係を示したグラフである。
■・・・予熱帯、 ２・・・加熱帯、３・
・・均熱帯、 ４・・・冷却帯、５・・・
最終冷却装置、 ６・・・硫酸浸漬槽、７・・・高
濃度硫酸電解酸洗槽、
８・・・清浄装置、 ９・・・乾燥装置、Ｓ
・・・ステンレスｔｇ４４ｉＦ。Fig. 1 is a schematic diagram of continuous annealing and pickling equipment for stainless steel strips according to the present invention, Fig. 2 is a graph showing the relationship between treatment time and current density in the high concentration sulfuric acid electrolytic pickling treatment according to the present invention; Figure 3 is a graph showing the relationship between current density and liquid temperature in high concentration sulfuric acid electrolytic pickling. ■・・・Preliminary zone, 2...Heating zone, 3...
... Soaking zone, 4... Cooling zone, 5...
Final cooling device, 6... Sulfuric acid dipping tank, 7... High concentration sulfuric acid electrolytic pickling tank, 8... Cleaning device, 9... Drying device, S
...Stainless steel TG44iF.
Claims (2)
に所定の熱処理を施す連続焼鈍設備及び酸洗設備によっ
てステンレス鋼帯に焼鈍処理と酸洗処理とを連続して施
すに当たり、還元性雰囲気下に間接加熱による焼鈍を施
すと共に、引き続く酸洗を少なくとも高濃度の硫酸水溶
液を電解液として使用する電解酸洗によって行うことを
特徴とするステンレス鋼帯の連続焼鈍・酸洗方法。(1) When sequentially subjecting a stainless steel strip to annealing treatment and pickling treatment using continuous annealing equipment and pickling equipment that perform predetermined heat treatment while sequentially transporting the steel strip from the heating zone to the cooling zone, A continuous annealing/pickling method for a stainless steel strip, characterized in that annealing is performed by indirect heating in a reducing atmosphere, and subsequent pickling is performed by electrolytic pickling using at least a highly concentrated sulfuric acid aqueous solution as an electrolyte.
を併せ備えたステンレス鋼帯の連続焼鈍・酸洗設備にお
いて、上記焼鈍炉の各帯域が主として竪型炉からなり、
かつ加熱帯が還元性雰囲気下に間接加熱を施すように構
成されており、上記酸洗設備が少なくとも高濃度の硫酸
水溶液を電解液として使用する電解酸洗槽を有すること
を特徴とするステンレス鋼帯の連続焼鈍・酸洗設備。(2) In a continuous annealing/pickling facility for stainless steel strips, which is equipped with a continuous annealing furnace having a heating zone and a cooling zone, and a pickling facility, each zone of the annealing furnace mainly consists of a vertical furnace;
and the heating zone is configured to perform indirect heating in a reducing atmosphere, and the pickling equipment has at least an electrolytic pickling tank that uses a highly concentrated sulfuric acid aqueous solution as an electrolyte. Continuous annealing and pickling equipment for strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21507089A JPH0379796A (en) | 1989-08-23 | 1989-08-23 | Method and equipment for continuously annealing and pickling stainless steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21507089A JPH0379796A (en) | 1989-08-23 | 1989-08-23 | Method and equipment for continuously annealing and pickling stainless steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0379796A true JPH0379796A (en) | 1991-04-04 |
Family
ID=16666260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21507089A Pending JPH0379796A (en) | 1989-08-23 | 1989-08-23 | Method and equipment for continuously annealing and pickling stainless steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0379796A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058986A1 (en) * | 2006-11-14 | 2008-05-22 | Danieli & C. Officine Meccaniche S.P.A. | Annealing and pickling process |
| CN104032318A (en) * | 2014-06-16 | 2014-09-10 | 中冶南方工程技术有限公司 | Annealing and acid washing production method for 409L cold-rolled strip steel |
| CN111575451A (en) * | 2020-04-28 | 2020-08-25 | 江油市瑞隆精密材料有限公司 | Cold-rolled strip steel continuous annealing process with energy-saving effect |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124232A (en) * | 1985-08-08 | 1987-06-05 | Kawasaki Steel Corp | Method and equipment for continuously annealing and pickling stainless steel strip |
| JPS6386899A (en) * | 1986-09-29 | 1988-04-18 | Kawasaki Steel Corp | Method for electrolytically pickling cold rolled and annealed stainless steel strip |
-
1989
- 1989-08-23 JP JP21507089A patent/JPH0379796A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124232A (en) * | 1985-08-08 | 1987-06-05 | Kawasaki Steel Corp | Method and equipment for continuously annealing and pickling stainless steel strip |
| JPS6386899A (en) * | 1986-09-29 | 1988-04-18 | Kawasaki Steel Corp | Method for electrolytically pickling cold rolled and annealed stainless steel strip |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058986A1 (en) * | 2006-11-14 | 2008-05-22 | Danieli & C. Officine Meccaniche S.P.A. | Annealing and pickling process |
| CN101558173A (en) * | 2006-11-14 | 2009-10-14 | 丹尼利机械设备股份公司 | Annealing and pickling process |
| US8192566B2 (en) | 2006-11-14 | 2012-06-05 | Danieli & C. Officine Meccaniche S.P.A. | Annealing and pickling process |
| CN104032318A (en) * | 2014-06-16 | 2014-09-10 | 中冶南方工程技术有限公司 | Annealing and acid washing production method for 409L cold-rolled strip steel |
| CN104032318B (en) * | 2014-06-16 | 2016-06-01 | 中冶南方工程技术有限公司 | A kind of 409L cold rolled strip annealing and pickling production method |
| CN111575451A (en) * | 2020-04-28 | 2020-08-25 | 江油市瑞隆精密材料有限公司 | Cold-rolled strip steel continuous annealing process with energy-saving effect |
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