JPS63295011A - Descaling device for stainless steel - Google Patents
Descaling device for stainless steelInfo
- Publication number
- JPS63295011A JPS63295011A JP12955487A JP12955487A JPS63295011A JP S63295011 A JPS63295011 A JP S63295011A JP 12955487 A JP12955487 A JP 12955487A JP 12955487 A JP12955487 A JP 12955487A JP S63295011 A JPS63295011 A JP S63295011A
- Authority
- JP
- Japan
- Prior art keywords
- aqueous solution
- tank
- descaling
- pickling
- water solution
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 14
- 239000010935 stainless steel Substances 0.000 title claims abstract description 12
- 238000005554 pickling Methods 0.000 claims abstract description 35
- 230000007935 neutral effect Effects 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims description 46
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 32
- 239000002253 acid Substances 0.000 claims description 28
- XWROUVVQGRRRMF-UHFFFAOYSA-N F.O[N+]([O-])=O Chemical compound F.O[N+]([O-])=O XWROUVVQGRRRMF-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 5
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 5
- 229910001566 austenite Inorganic materials 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 6
- FWFGVMYFCODZRD-UHFFFAOYSA-N oxidanium;hydrogen sulfate Chemical compound O.OS(O)(=O)=O FWFGVMYFCODZRD-UHFFFAOYSA-N 0.000 abstract 3
- 238000000034 method Methods 0.000 description 13
- 239000002436 steel type Substances 0.000 description 9
- 238000007654 immersion Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 4
- ZODDGFAZWTZOSI-UHFFFAOYSA-N nitric acid;sulfuric acid Chemical compound O[N+]([O-])=O.OS(O)(=O)=O ZODDGFAZWTZOSI-UHFFFAOYSA-N 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000010301 surface-oxidation reaction Methods 0.000 description 2
- -1 7-Elai) M Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000001256 tonic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野）
本発明は、鋼種の異なった熱間圧延ステンレス鋼の表面
酸化スケールを同一装置で行うことがでさる脱スケール
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a descaling device that can perform surface oxidation scaling on hot rolled stainless steels of different steel types using the same device.
（従来技術）
熱間圧延ステンレス鋼の表面酸化スケール除去方法とし
ては、従来次のような方法が知られている。(Prior Art) The following methods are conventionally known as methods for removing surface oxidation scale from hot rolled stainless steel.
（１）スケールブレーカ−、ショツトブラストなどのメ
カニカル処理によりスケールに亀裂を入れたり、スケー
ルを破壊した後、硝酸−７ツ酸混酸水溶液に浸漬して酸
洗する方法。(1) A method in which the scale is cracked or destroyed by mechanical treatment such as scale breaker or shot blasting, and then pickled by immersion in an aqueous solution of a nitric acid-7tonic acid mixture.
（２）前記（１）の方法のようなメカニカル処理を施し
た後、中性電解塩処理を施し、その後硝酸−７ツ酸混酸
水溶液に浸漬して酸洗する方法。(2) After mechanical treatment as in method (1) above, a neutral electrolytic salt treatment is performed, followed by pickling by immersion in an aqueous solution of nitric acid-hetamine acid mixture.
（３）前記（１）の方法のようなメカニカル処理を施し
た後、中性塩電解処理を施し、その後硫酸水溶液への浸
漬処理、硝酸−７７酸の混酸水溶液への浸漬処理を順次
施す方法。(3) A method in which, after mechanical treatment as in method (1) above, neutral salt electrolysis treatment is performed, followed by immersion treatment in a sulfuric acid aqueous solution and immersion treatment in a mixed acid aqueous solution of nitric acid-77 acid. .
しかしながら、前記（１）の方法は、脱スケールの一部
を脱スケール能力の弱い酸洗により行わなければならな
いため、ステンレス鋼の代表鋼種である５Ｕ３３０４な
どのオーステナイト系、Ｓ Ｕ Ｓ −１３０のような
フェライト系、さらにはマルテンサイ）Ｍに対して脱ス
ケール能力が弱いものであった。このため、従来これら
の鋼種のものを脱スケールする場合は、混酸水溶液のＮ
ｌ濃度を高くしたり、ラインスピードを遅くして浸漬時
間を長くしていたが、このようにすると酸の使用量が多
くなり、しかも生産性も低くなることから、脱スケール
費が高くなるという欠点があった。このため、従来脱ス
ケールする場合は、（２）の方法または（３）の方法で
行っていた。However, in method (1) above, part of the descaling must be carried out by pickling, which has a weak descaling ability. The descaling ability was weak compared to ferritic and even martensitic (M). For this reason, conventionally when descaling these steel types, N
The immersion time was increased by increasing the acid concentration or slowing down the line speed, but this increased the amount of acid used and also lowered productivity, resulting in higher descaling costs. There were drawbacks. For this reason, when descaling has conventionally been performed, method (2) or method (3) has been used.
しかし、（２）の方法は、オーステナイト系の鋼種に対
する脱スケール能力が大きいものであったが、７ヱライ
）Ｍやマルテンサイト系の鋼種に対しては、脱スケール
能力が弱いため、混酸水７８液の濃度を高くするか、ラ
インスピードを遅くしなければならないものであった。However, although method (2) had a large descaling ability for austenitic steel types, it had a weak descaling ability for 7. This required either increasing the concentration of the liquid or slowing down the line speed.
これに対して、（３）の方法は、硫酸水溶液への浸漬処
理を追加しているため、フェライト系やマルテンサイト
系の１４種に対する脱スケール能力は、（２）の方法に
比べて大幅に向上するが、オーステナイト系の鋼種に対
する脱スケール能力は、（２）の方法と同等か、若干の
向上しか認められず、７ヱライ）Ｍやマルテンサイ）Ｍ
の鋼種に比べ脱スケール１毛力は、弱いものであった。On the other hand, method (3) adds immersion treatment in a sulfuric acid aqueous solution, so its descaling ability for 14 types of ferrite and martensitic systems is significantly greater than method (2). However, the descaling ability for austenitic steel types is the same as that of method (2), or only slightly improved.
The descaling strength was weaker than that of steel types.
このため、従来オーステナイ）Ｒの＠種とフェライト系
やマルテンサイト系の鋼種とを脱スケールする場合は、
別々の脱スケールラインで行っていた。For this reason, when descaling conventional austenite) R @ type and ferritic or martensitic steel types,
This was done on separate descaling lines.
（発明が解決しようとする問題点）
しかしながら、鋼種により異なった脱スケールラインを
設けるのは、設備費がかかり、設備の稼動率も低くなる
ｔこめ、同一ラインで実施できるようにする必要があっ
た。(Problem to be solved by the invention) However, setting up different descaling lines for different steel types increases equipment costs and lowers the operating rate of the equipment, so it is necessary to make it possible to perform descaling on the same line. Ta.
（問題、げｌを解決するための手段）
本発明は、ステンレス鋼の入側よりメカニカル処理装置
、中性塩電解槽、第１酸洗梢および１２酸洗槽を順次配
置するとともに１、第１酸洗槽にかｔして硝酸−７フ酸
混酸水溶液貯藏梢と硫酸水溶液貯蔵槽とを配置して、第
１酸洗槽と各水溶液貯Ｍ槽との開に前者から後者への水
溶液移送装置ｄと後者から前者への水溶液移送装置とを
設け、硫酸貯蔵槽には水溶液温度制御装置を設け、ａ種
に関係なく同一フィンで脱スケールできるようにした。(Means for solving the problems and gelling) The present invention sequentially arranges a mechanical treatment device, a neutral salt electrolytic tank, a first pickling tank, and a 12th pickling tank from the entrance side of stainless steel. A nitric acid-7hydric acid mixed acid aqueous solution storage tank and a sulfuric acid aqueous solution storage tank are arranged in the first pickling tank, and when the first pickling tank and each aqueous solution storage tank are opened, the aqueous solution is transferred from the former to the latter. A transfer device d and an aqueous solution transfer device from the latter to the former were provided, and an aqueous solution temperature control device was provided in the sulfuric acid storage tank, so that descaling could be performed with the same fin regardless of type a.
ユニでメカニカル処理装置としては、スケールブレーカ
−のようにステンレス鋼に曲げ加工や引張り加工を施し
、スケールに亀裂を与える装置、あるいはショツトブラ
ストやサンドブラストなどのようにスケールを破壊する
装置など公知のものでよい。また、中性塩電解Ｖｃｉ？
？、第１酸洗槽および第２酸洗槽も公知のものでよい。At Uni, we use well-known mechanical processing equipment such as scale breakers, which bend or stretch stainless steel to create cracks in scale, and shot blasting, sandblasting, and other equipment that destroy scale. That's fine. Also, neutral salt electrolysis Vci?
? , the first pickling tank and the second pickling tank may also be of known type.
（作用）
この装置は、脱スケールするステンレス鋼がオーステナ
イト系の鋼種の場合、第１酸洗槽に硝酸−７７酸の混酸
水溶液を、ステンレス鋼がフェライト系もしくはマルテ
ンサイト系のｆＩＡ種である場合は、硫酸水溶液を入れ
、第２酸洗槽には、いずれのｗ４種の場合も硝酸−７ツ
酸の混酸水溶液を入れて脱スケールする。(Function) When the stainless steel to be descaled is an austenitic steel type, a mixed acid aqueous solution of nitric acid-77 acid is added to the first pickling tank, and when the stainless steel is a ferritic or martensitic fIA type stainless steel, A sulfuric acid aqueous solution is added to the second pickling tank, and a mixed acid aqueous solution of nitric acid and hetamine acid is added to the second pickling tank for all types of W4 to descale.
第１酸洗槽に、上記のように、脱スケール鋼種により）
４なった酸水洛液を入れるには、酸水７８液の入れ換え
を必要とするが、入れ棒えは、第１酸洗槽に対して硝酸
−７７酸の？ＪＬ酸水１８液貯蔵槽と硫酸水溶液貯蔵槽
とが配置され、第１酸洗槽と各水溶液貯ｉ＆槽との闇に
前者から後者への水溶液移送装置と後者から前者への水
溶液移送装置とが設けられているので、一方の酸水溶液
を使用中、他方の酸水溶液を貯蔵槽に貯蔵できる。＊た
、硫酸水溶液は、貯蔵中に液温か低下すると、硫酸鉄の
結晶が析出し、貯蔵槽や水溶液移送装置のポンプ、配管
等を目詰まりさせるが、貯蔵槽に水溶ｗＬ温度制御装置
を設けであるので、それらを目詰まりさせない。In the first pickling tank, as above, depending on the descaling steel type)
In order to add the acid water solution that has become 4.0, it is necessary to replace the acid water 78 solution, but the replacement is nitric acid - 77 acid solution for the first pickling tank. A JL acid water 18 liquid storage tank and a sulfuric acid aqueous solution storage tank are arranged, and in the darkness between the first pickling tank and each aqueous solution storage tank, an aqueous solution transfer device from the former to the latter and an aqueous solution transfer device from the latter to the former are installed. is provided, so that while one acid aqueous solution is in use, the other acid aqueous solution can be stored in the storage tank. *If the temperature of an aqueous sulfuric acid solution decreases during storage, crystals of iron sulfate will precipitate, clogging the storage tank, the pump, piping, etc. of the aqueous solution transfer device. Therefore, they do not become clogged.
（実施例）
ｔＩｔＪ１図は、本発明の脱スケール装置の１実施例を
示すもので、図において左側よりメカニカル処理装置１
、中性塩電解Ｍ４２、第１酸洗ＷＪ３および第２酸洗槽
４が順次直列に配置され、ステンレスｗ４帯５が左側よ
り入るようになっている。これらの槽は、従来の公知構
造のもので、第１酸洗槽３の内部には洗浄装ｆｆｆｆ１
６が設けられ、外部には硝酸−７ツ酸混酸水溶液貯蔵槽
７と硫酸水溶液貯蔵槽８とが配置されている。(Example) Figure tItJ1 shows one example of the descaling device of the present invention.
, neutral salt electrolysis M42, first pickling WJ3 and second pickling tank 4 are arranged in series, and the stainless steel W4 band 5 is inserted from the left side. These tanks are of conventional known structure, and inside the first pickling tank 3 is a cleaning device ffff1.
6, and an aqueous nitric acid-sulfuric acid solution storage tank 7 and a sulfuric acid aqueous solution storage tank 8 are arranged outside.
そして、硝酸−７ツ酸混酸水溶液貯蔵Ｍ７には供給ポン
プ９がバルブ１０を有する供給管１１を介して連結され
おり、同様に硫酸水溶液貯蔵槽８にも供給ポンプ９ａが
バルブ１０ａを有する供給管１１ａを介して連結されて
いる。供給ポンプ９と９ａとはポンプ近傍にバルブ１２
．１２ａを有する供給管１３で連結され、供給管１３の
バルブ１２．１２ａの開は、供給管１４でｆｊ４１酸洗
槽３に連結されている。また、供給ポンプつと９ａとは
ポンプ近傍にバルブ１５．１５ａを有する排出管１６で
連結され、排出管１６のバルブ１５．１５ａの間は、排
出管１７で中和処理槽１８に連結されている。A supply pump 9 is connected to the nitric acid-sulfuric acid mixed aqueous solution storage M7 via a supply pipe 11 having a valve 10, and similarly, a supply pump 9a is connected to the sulfuric acid aqueous solution storage tank 8 through a supply pipe having a valve 10a. They are connected via 11a. The supply pumps 9 and 9a have a valve 12 near the pump.
．． The opening of the valve 12.12a of the supply pipe 13 is connected to the fj41 pickling tank 3 by the supply pipe 14. Further, the supply pumps 9a are connected to each other by a discharge pipe 16 having a valve 15.15a near the pump, and the part between the valves 15.15a of the discharge pipe 16 is connected to the neutralization treatment tank 18 by a discharge pipe 17. .
また、硝酸−７ツ酸混酸水溶液貯蔵槽７と硫酸水溶液貯
蔵槽８とは、バルブ１９．１９ａを有する排出管２０で
連結され、そのバルブ１９と１９αとの間は、排出管２
１で排出ポンプ２２に連結されている。そして、排出ポ
ンプ２２は、バルブ２３を有する排出管２４で第１酸洗
Ｍ！３に連結されている。Further, the nitric acid-sulfuric acid mixed acid aqueous solution storage tank 7 and the sulfuric acid aqueous solution storage tank 8 are connected by a discharge pipe 20 having a valve 19.19a, and a discharge pipe 20 is connected between the valves 19 and 19α.
1 is connected to a discharge pump 22. Then, the discharge pump 22 is connected to the first pickling M! with a discharge pipe 24 having a valve 23. It is connected to 3.
硫酸水溶液貯蔵槽８には、水溶液温度制御装置２５が設
けられ、水ｍ液温度を制御でさるようになっている。The sulfuric acid aqueous solution storage tank 8 is provided with an aqueous solution temperature control device 25 to control the temperature of the aqueous solution.
このｖｃｒ！１で硝酸−７ツ酸混酸水溶液貯Ｍ４ｆ！７
より第１酸洗槽３に硝酸−７７酸の混酸水１８液を供給
するには、バルブ１０．１２を開いて、供給ポンプ９を
作動させればよい。逆に第１酸洗槽；シより混酸水溶液
を硝酸−７ツ酸混酸水溶液貯蔵槽７に戻すには、バルブ
１つ、２３を開いて、排出ポンプ２２を作動させればよ
い。一方、硫酸水溶液貯ｉ＆槽８より第１酸洗槽３に硫
酸水溶液を供給するには、バルブ１０ａ、１２ａを開い
て、供給ポンプ９ａを作動させればよい。また、第１酸
洗槽；）より硫酸水溶液貯蔵Ｗｇ８に硫酸水溶液を戻す
には、バルブ１９ａ、２３を開いて、排出ポンプ２２を
作動させればよい。This vcr! 1 to store nitric acid-7tonic acid mixed acid aqueous solution M4f! 7
In order to supply 18 liquids of nitric acid-77 acid mixed acid water to the first pickling tank 3, it is sufficient to open the valve 10.12 and operate the supply pump 9. On the other hand, in order to return the mixed acid aqueous solution from the first pickling tank to the nitric acid-sulfuric acid mixed acid aqueous solution storage tank 7, it is sufficient to open one valve 23 and operate the discharge pump 22. On the other hand, in order to supply the sulfuric acid aqueous solution from the sulfuric acid aqueous solution storage tank 8 to the first pickling tank 3, the valves 10a and 12a may be opened and the supply pump 9a may be operated. Furthermore, in order to return the sulfuric acid aqueous solution from the first pickling tank ;
（効果）
以上のごとく、本発明の装置ｎによれば、オーステナイ
ト系ステンレス鋼と７エライ）Ｍおよびマルテンサイト
系ステンレス鋼の脱スケールを同−Ｖ装置で実施できる
。(Effects) As described above, according to the apparatus n of the present invention, descaling of austenitic stainless steel, 7-Elai) M, and martensitic stainless steel can be carried out using the same -V apparatus.
第、１図は、本発明に係る脱スケール装置の実施例を示
すものである。
１・・・メカニカル処理装置、２・・・中性塩電解槽、
３・・・第１酸洗槽、４・・・第２酸洗Ｍｇ４．５・・
・ステンレス鋼帯、６・・・洗浄装置、７・・・硝酸−
７ツ酸混酸水溶液貯蔵槽、８・・・硫酸水溶液貯蔵槽、
９．９ａ・・・供給ポンプ、１０．１０ａ・・・バルブ
、１１、ｌｌａ・・・供給管、１２．１２ａ・・・バル
ブ、１３・・・供給管、１４・・・供給管、１５．１５
ａ・・・バルブ、１６・・・排出管、１７・・・排出管
、１８・・・中和路Ｊ！ｌｊ槽、１９．１９ｕ・・・バ
ルブ、２０・・・排出管、２１・・・排出管、２２・・
・排出ポンプ、２３・・・バルブ、２４・・・排出骨、
２５・・・水溶液温度制御装置、FIG. 1 shows an embodiment of the descaling apparatus according to the present invention. 1... Mechanical processing device, 2... Neutral salt electrolytic cell,
3...First pickling tank, 4...Second pickling Mg4.5...
・Stainless steel strip, 6...Cleaning device, 7...Nitric acid-
7. Tonic acid mixed acid aqueous solution storage tank, 8... Sulfuric acid aqueous solution storage tank,
9.9a... Supply pump, 10.10a... Valve, 11, lla... Supply pipe, 12.12a... Valve, 13... Supply pipe, 14... Supply pipe, 15. 15
a... Valve, 16... Discharge pipe, 17... Discharge pipe, 18... Neutralization road J! lj tank, 19.19u...valve, 20...discharge pipe, 21...discharge pipe, 22...
・Discharge pump, 23... Valve, 24... Discharge bone,
25...Aqueous solution temperature control device,
Claims (1)
解槽、第１酸洗槽および第２酸洗槽を順次配置するとと
もに、、第１酸洗槽に対して硝酸−フッ酸混酸水溶液貯
蔵槽と硫酸水溶液貯蔵槽とを配置して、第１酸洗槽と各
水溶液貯蔵槽との間に前者から後者への水溶液移送装置
と後者から前者への水溶液移送装置とを設け、硫酸貯蔵
槽には水溶液温度制御装置を設けたことを特徴とするス
テンレス鋼の脱スケール装置。A mechanical processing device, a neutral salt electrolytic tank, a first pickling tank, and a second pickling tank are arranged in order from the entrance side of the stainless steel, and a nitric acid-hydrofluoric acid mixed acid aqueous solution storage tank is connected to the first pickling tank. and a sulfuric acid aqueous solution storage tank, an aqueous solution transfer device from the former to the latter and an aqueous solution transfer device from the latter to the former are provided between the first pickling tank and each aqueous solution storage tank, and an aqueous solution transfer device from the latter to the former is provided between the first pickling tank and each aqueous solution storage tank. is a stainless steel descaling device that is equipped with an aqueous solution temperature control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12955487A JPS63295011A (en) | 1987-05-26 | 1987-05-26 | Descaling device for stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12955487A JPS63295011A (en) | 1987-05-26 | 1987-05-26 | Descaling device for stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63295011A true JPS63295011A (en) | 1988-12-01 |
Family
ID=15012374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12955487A Pending JPS63295011A (en) | 1987-05-26 | 1987-05-26 | Descaling device for stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63295011A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04232299A (en) * | 1990-07-27 | 1992-08-20 | Andritz Patentverwaltungs Gmbh | Pickling of high grade steel |
| JPH0665798A (en) * | 1992-08-19 | 1994-03-08 | Sumitomo Metal Ind Ltd | Method for descaling stainless steel and device therefor |
| JP2009173980A (en) * | 2008-01-23 | 2009-08-06 | Jfe Steel Corp | Recovery, regeneration, and supply method of acid solution in annealing-pickling equipment, acid-pickling tank, and pickling equipment for steel strip |
-
1987
- 1987-05-26 JP JP12955487A patent/JPS63295011A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04232299A (en) * | 1990-07-27 | 1992-08-20 | Andritz Patentverwaltungs Gmbh | Pickling of high grade steel |
| JPH0665798A (en) * | 1992-08-19 | 1994-03-08 | Sumitomo Metal Ind Ltd | Method for descaling stainless steel and device therefor |
| JP2009173980A (en) * | 2008-01-23 | 2009-08-06 | Jfe Steel Corp | Recovery, regeneration, and supply method of acid solution in annealing-pickling equipment, acid-pickling tank, and pickling equipment for steel strip |
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