EP1283914A2 - Verfahren und einrichtung zum beizen von edelstahlwarmbändern - Google Patents
Verfahren und einrichtung zum beizen von edelstahlwarmbändernInfo
- Publication number
- EP1283914A2 EP1283914A2 EP01938180A EP01938180A EP1283914A2 EP 1283914 A2 EP1283914 A2 EP 1283914A2 EP 01938180 A EP01938180 A EP 01938180A EP 01938180 A EP01938180 A EP 01938180A EP 1283914 A2 EP1283914 A2 EP 1283914A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pickling
- rinsing
- stainless steel
- stages
- sections
- 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
- 238000005554 pickling Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 title abstract description 6
- 239000010959 steel Substances 0.000 title abstract description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 28
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000008237 rinsing water Substances 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 7
- 150000007513 acids Chemical class 0.000 claims abstract description 6
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 24
- 239000010935 stainless steel Substances 0.000 claims description 24
- 229910017604 nitric acid Inorganic materials 0.000 claims description 17
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
- 238000000137 annealing Methods 0.000 description 8
- 238000005422 blasting Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Definitions
- the invention relates to a method and a device for pickling stainless steel warm tapes with austenitic, ferritic and / or martensitic structure, which is guided in a pickling line through pickling stages with acids and rinsing stages with rinsing water.
- the object of the invention is to eliminate the need for an additional blasting process for descaling in pickling and, above all, to reduce the cost of pickling.
- the object is achieved according to the invention in that the stainless steel hot band is pickled in the pickling stages with hydrochloric acid and softened with nitric acid or an equivalent replacement pickling medium in the first rinsing stages and treated with rinsing water in further rinsing stages.
- pickling with nitric acid or an equivalent replacement pickling medium any remaining scale residue on the belt can be removed.
- the use of blasting cabins is not necessary. Since the annealing of stainless steel hot band is not absolutely necessary after further processing, the costly production on an annealing and pickling line can be avoided under certain circumstances.
- the pickling in hydrochloric acid drastically reduces the amount of metal dissolved in the nitric acid. This is associated with a reduction in the known problematic reaction products (NO x gases in the exhaust air and nitrates in the waste water) which are known from production. Even when using an appropriate replacement medium for the nitric acid, the known disadvantages are also eliminated. According to the teaching of the invention, pickled stainless steel warming tapes with an improved surface quality are also achieved. In addition, the operating costs are significantly lower compared to the known methods. In an embodiment it is provided that the stainless steel hot band is pickled with hydrochloric acid in at least one pickling stage. The advantage is the drastic reduction in the amount of metal released by pickling,
- the stainless steel hot band is treated with the nitric acid or an equivalent replacement pickling medium in at least one or more rinsing stages. Complete descaling can thereby advantageously be achieved.
- the stainless steel hot band is then treated with rinsing water in two or more rinsing stages. This completely eliminates the acids used.
- An improvement of the invention further consists in that a pickling medium containing hydrogen peroxide is provided as the equivalent replacement pickling medium.
- This pickling medium works in the same way as nitric acid.
- the equivalent replacement pickling medium can be formed from a mixture of sulfuric acid or hydrochloric acid with hydrogen peroxide and other additives.
- the device for pickling stainless steel hot strip with an austenitic, ferritic and / or martensitic structure which can possibly be guided through a pickling line behind a soft annealing furnace, achieves the object according to the invention.
- the stainless steel hot band can be treated with rinse water when entering a pickling line consisting of several pickling tanks with hydrochloric acid and several washing tanks with nitric acid or an equivalent replacement pickling medium and further washing tanks.
- the advantages are the improvements compared to the prior art that have already been mentioned for the method steps.
- the number of pickling stages can be varied. A preferred design results from the fact that the first three pickling tanks in the pickling line are filled with hydrochloric acid.
- the pickling can also be lengthened or shortened by the number of pickling stages, in that the rinsing mares in the pickling line consist of rinsing tanks with nitric acid or an equivalent substitute pickling medium and subsequent rinsing tanks with rinsing water.
- the rinsing stages are formed from at least one rinsing tank with nitric acid or with an equivalent replacement pickling medium and from at least two rinsing tanks with rinsing water.
- FIG. 1 shows a block diagram of a complete belt system for pickling
- Figure 3 shows the pickling stages of the pickling or washing tanks in stainless steel production.
- the stainless steel warm strip 1 of strip coils of an input section 2 passes through a welding device 3 (for a coil change) through 120 a trimming machine 4 into an input loop former 5 and, if necessary, through a soft annealing furnace 6 into the pickling line 7.
- the pickling line 7 forms Strippers stages 8 and rinse stages 9, which are described in more detail below.
- the stainless steel hot strip 1 exits the last rinsing stage 9 and enters an exit loop former 10 and passes through an output pair of scissors 125 11 at the end of the strip. During the continuous passage, the stainless steel warm strip 1 is wound again in the exit section 12.
- the pickling line 7 in the pickling stage 8 is operated with three pickling tanks and hydrochloric acid during normal steel production, during which the rinsing stages 130 all work with rinsing water (rinsing No. 1 and 2, rinsing 3 to 6).
- the pickling line 7 is constructed as follows. In pickling tanks 16 of the pickling line 7 there is hydrochloric acid 13 in the pickling stages 8 as pickling medium 14a.
- the rinsing mares 9 are formed by rinsing tanks 17, in which there is nitric acid 14 or a replacement pickling mode 14 in the sink No. 1 135 and in the sink No. 2 14b is located. In the following rinse stages 9, rinse water 15 is used.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Forging (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10022083A DE10022083A1 (de) | 2000-05-08 | 2000-05-08 | Verfahren und Einrichtung zum Beizen von Edelstahlwarmbändern |
| DE10022083 | 2000-05-08 | ||
| PCT/EP2001/005118 WO2001086024A2 (de) | 2000-05-08 | 2001-05-05 | Verfahren und einrichtung zum beizen von edelstahlwarmbändern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1283914A2 true EP1283914A2 (de) | 2003-02-19 |
| EP1283914B1 EP1283914B1 (de) | 2004-06-30 |
Family
ID=7640997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01938180A Expired - Lifetime EP1283914B1 (de) | 2000-05-08 | 2001-05-05 | Verfahren und einrichtung zum beizen von edelstahlwarmbändern |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6843860B2 (de) |
| EP (1) | EP1283914B1 (de) |
| JP (1) | JP2004511649A (de) |
| KR (1) | KR20020091279A (de) |
| CN (1) | CN1281789C (de) |
| AT (1) | ATE270354T1 (de) |
| CA (1) | CA2406647A1 (de) |
| DE (2) | DE10022083A1 (de) |
| ES (1) | ES2223866T3 (de) |
| MX (1) | MXPA02011004A (de) |
| TR (1) | TR200401642T4 (de) |
| WO (1) | WO2001086024A2 (de) |
| ZA (1) | ZA200209827B (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2576868T3 (en) * | 2010-05-27 | 2018-10-29 | Mj Liquid Solutions Inc | PROCEDURE FOR TREATING ARTICLES OF ROLLED STEEL |
| CN102011131B (zh) * | 2010-07-27 | 2012-05-23 | 福建方明环保科技有限公司 | 污水零排放金属带材表面清洗装置及其清洗方法 |
| CN103572037A (zh) * | 2013-10-12 | 2014-02-12 | 酒泉钢铁(集团)有限责任公司 | 一种钢铁热轧卷材板材共线热处理生产线及生产工艺 |
| CN112795934B (zh) * | 2020-12-27 | 2022-07-08 | 山东盛阳金属科技股份有限公司 | 一种300系不锈钢花纹板酸洗系统及其工艺 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE561107A (de) * | 1956-09-25 | |||
| JPS6063390A (ja) * | 1983-09-19 | 1985-04-11 | Kawasaki Steel Corp | フェライト系およびマルテンサイト系ステンレス鋼帯の連続酸洗方法 |
| JP2613317B2 (ja) * | 1990-04-20 | 1997-05-28 | 川崎製鉄株式会社 | ステンレス鋼帯の焼鈍・脱スケール方法 |
| US5821212A (en) * | 1997-02-13 | 1998-10-13 | Crown Technology, Inc. | Rinse aid and process for stainless steel |
-
2000
- 2000-05-08 DE DE10022083A patent/DE10022083A1/de not_active Withdrawn
-
2001
- 2001-05-05 CN CNB018092438A patent/CN1281789C/zh not_active Expired - Fee Related
- 2001-05-05 TR TR2004/01642T patent/TR200401642T4/xx unknown
- 2001-05-05 EP EP01938180A patent/EP1283914B1/de not_active Expired - Lifetime
- 2001-05-05 WO PCT/EP2001/005118 patent/WO2001086024A2/de not_active Ceased
- 2001-05-05 KR KR1020027014938A patent/KR20020091279A/ko not_active Abandoned
- 2001-05-05 AT AT01938180T patent/ATE270354T1/de active
- 2001-05-05 CA CA002406647A patent/CA2406647A1/en not_active Abandoned
- 2001-05-05 MX MXPA02011004A patent/MXPA02011004A/es active IP Right Grant
- 2001-05-05 JP JP2001582607A patent/JP2004511649A/ja not_active Withdrawn
- 2001-05-05 ES ES01938180T patent/ES2223866T3/es not_active Expired - Lifetime
- 2001-05-05 US US10/258,909 patent/US6843860B2/en not_active Expired - Fee Related
- 2001-05-05 DE DE50102747T patent/DE50102747D1/de not_active Expired - Lifetime
-
2002
- 2002-12-04 ZA ZA200209827A patent/ZA200209827B/en unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0186024A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2406647A1 (en) | 2002-10-28 |
| WO2001086024A3 (de) | 2002-11-07 |
| TR200401642T4 (tr) | 2004-08-23 |
| MXPA02011004A (es) | 2003-04-25 |
| KR20020091279A (ko) | 2002-12-05 |
| EP1283914B1 (de) | 2004-06-30 |
| WO2001086024A2 (de) | 2001-11-15 |
| CN1281789C (zh) | 2006-10-25 |
| CN1439063A (zh) | 2003-08-27 |
| US6843860B2 (en) | 2005-01-18 |
| JP2004511649A (ja) | 2004-04-15 |
| ES2223866T3 (es) | 2005-03-01 |
| US20030178045A1 (en) | 2003-09-25 |
| DE50102747D1 (de) | 2004-08-05 |
| DE10022083A1 (de) | 2001-11-15 |
| ZA200209827B (en) | 2003-10-07 |
| ATE270354T1 (de) | 2004-07-15 |
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