EP1477583B1 - Anlage und Verfahren zum Beizen von Gegenständen aus Stahl - Google Patents

Anlage und Verfahren zum Beizen von Gegenständen aus Stahl Download PDF

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Publication number
EP1477583B1
EP1477583B1 EP04010403A EP04010403A EP1477583B1 EP 1477583 B1 EP1477583 B1 EP 1477583B1 EP 04010403 A EP04010403 A EP 04010403A EP 04010403 A EP04010403 A EP 04010403A EP 1477583 B1 EP1477583 B1 EP 1477583B1
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EP
European Patent Office
Prior art keywords
pickling
rinsing
booth
water
tank
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.)
Expired - Lifetime
Application number
EP04010403A
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German (de)
English (en)
French (fr)
Other versions
EP1477583A1 (de
Inventor
Friedrich-Werner Siedentop
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siedentop GmbH
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Siedentop GmbH
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Publication date
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Application filed by Siedentop GmbH filed Critical Siedentop GmbH
Priority to PL04010403T priority Critical patent/PL1477583T3/pl
Publication of EP1477583A1 publication Critical patent/EP1477583A1/de
Application granted granted Critical
Publication of EP1477583B1 publication Critical patent/EP1477583B1/de
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    • 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
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • 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 according to the preamble of claim 1 and a system according to the preamble of claim 7 for pickling objects made of steel or stainless steel.
  • Such methods and systems for the surface treatment of metals are known in a wide variety of configurations in the prior art.
  • a metal oxide layer or scale layer is frequently formed on its surface, which impairs both the appearance and the possible further processing of the material.
  • stainless steel this unwanted layer adheres very firmly to the surface, so that aggressive acids are used for pickling.
  • a common pickling acid mixture is nitric acid and hydrofluoric acid which is used in aqueous solution.
  • the manual spray pickling is known in which the pickling agent is applied with a spray lance by hand.
  • the stain is set viscous and adheres well to the metal surface. After a contact time of 1 ⁇ 2 to 2 hours, the stain is then washed off with water. Nitrogenous gases from nitric acid and fluorine gas from hydrofluoric acid are produced by this procedure harmful effects must be extracted.
  • the exhaust air In order to limit the polluting effect, the exhaust air must be cleaned with an exhaust air scrubber, whereby about 50% of the nitrous gases and 98% of the fluorine gases are washed out.
  • the sprayer must wear suitable protective clothing with respiratory protection when spraying and washing the stain, as the workplace limits are exceeded.
  • Tauchbeizvon are known in which the object to be dressed is passed through a pick-up in a pickling tank.
  • Beizklachung also nitrous gases and fluorine gases.
  • a Randabsaugung on the pickling tank is therefore also required.
  • To reduce the uncontrolled escape of gases from the plunge pool is from the DE 26 08 550 C2 known to cover the plunge pool by plane-like covers. Nevertheless, toxic exhaust air is produced, which can also be cleaned with an exhaust air scrubber if necessary.
  • the EP 0 949 355 A1 proposes a clenched, under permanent negative pressure pickling plant, which works with an air supply and a suction. Furthermore, from the DE 36 35 525 C3 a completed plant for pickling workpieces known in which a held under negative pressure, hermetically sealed cabin contain the treatment stations of the pickling plant.
  • pickling solutions have been proposed that dispense in particular with the use of the usual nitric acid in order to improve the environmental properties.
  • the DE 197 21 135 A1 a pickling solution containing a hydrochloric acid as the only acid to be applied in a spray treatment.
  • the DE 38 37 053 A1 proposed a consisting of an aqueous hydrofluoric acid pickling bath, which is fed continuously ozone as an oxidizing agent.
  • a pickling solution with, for example, sulfuric acid and hydrofluoric acid and hydrogen peroxide and a stabilizer known with a good cleaning result without the use of environmentally critical nitric acid is achieved.
  • the DE 44 11 163 A1 describes a method for treating parts or components by spraying and / or flooding with a solvent operating in batch mode.
  • a solvent in particular dichloromethane is used, which requires special precautions during processing due to its physico-chemical properties.
  • a vacuum is generated, in which the dichloromethane is sprayed.
  • the treatment chamber, the products contained therein, and the air-gas mixture formed in the chamber must be thoroughly cleaned.
  • the air-gas mixture must be repeatedly evacuated from the chamber and cleaned. The purified air is then released to the environment.
  • a gas displacement line is provided.
  • a chemical treatment plant for degreasing, alkaline cleaning, pickling and / or conversion coating is known in which the workpiece to be machined is equipped in batch mode in a booth having a fluorine pipe treating means and at least one treating agent tank.
  • a tank can be filled with rinse water.
  • Object of the present invention is to provide a method and a system for Spritzbeizen form so that improved environmental compatibility and resource conservation compared to the prior art is given.
  • this spray mist binds the gases produced in the gas space of the booth from the pickling agent and causes them to sink as aerosols .
  • Fresh water is preferably used for this spray mist, which is discharged via separate, particularly fine mist nozzles above the nozzle arrangement in the pickling booth.
  • the resulting moisture binds namely the remaining gas particles of the washable pickling agent. This moisture settles and collects on the cabin floor. From there, the now slightly contaminated fresh water is pumped into the detergent tank or the detergent tank with purest rinse water.
  • the same nozzle arrangement in the pickling booth is used both for the pickling agent and for the rinsing water.
  • a large part of the supply line is used alternately for pickling agent or rinse water.
  • a large part of the supply line and the nozzle arrangement are flushed with the rinse water and thus cleaned of the aggressive stain. An undesirable whereabouts of pickling agent in the nozzle assembly and in a large part of the supply lines is thus reliably avoided.
  • shut-off valves can also be provided in the gas displacement lines in order to avoid excessive mixing of the different exhaust gas concentrations forming in the two method steps from the pickling agent.
  • the forming during the pickling significantly concentrated exhaust gases, usually fluorine gas can thus be prevented from mixing with the less concentrated exhaust gases of the same substance during the flushing process and in the flushing water tank.
  • the rinse water may already contain fractions of the mordant, so it does not have to be particularly pure and serves to rinse off the mordant residues adhering to the article.
  • the rinsing process is carried out in several stages from several rinsing water tanks, with each rinsing process, the purity of the rinse water increases, is realized a multi-stage Spülkaskade that allows a particularly effective cleaning of pickling goods.
  • the first rinse with a more heavily loaded with pickling rinse water, the second rinse with a less polluted water and so on until finally the last rinse with pure rinse occurs.
  • a collecting means for collecting the sprayed liquids is formed, lead from the return lines to the pickling tank or to the rinse water tank, both the descending pickling agent and the rinse water is collected in the pickling booth and returned to the tanks.
  • the gas displacement lines are also active and allow a gas balance between pickling and the respective refilled tank.
  • the sinking of the aerosols is largely completely awaited in order to be able to remove the objects treated from the pickling booth.
  • the pickled and rinsed workpieces can be additionally sprayed manually by a high pressure water.
  • a suction can be omitted here, since the limits to be observed for the exhaust gases of the pickling agent, usually fluorine gas, are significantly below.
  • Passivation preferably with stabilized citric acid
  • subsequent water rinsing is preferably carried out after the rinsing process or after the fresh water misting. Furthermore, degreasing of the objects intended for pickling should be carried out before pickling.
  • the pickling cabin 1 is hermetically sealed to the environment.
  • the articles to be dressed are presented, for example, in a pickling basket A.
  • a nozzle assembly 11 for spraying the workpieces to be pickled in the pickling basket A with a pickling agent B.
  • the pickling agent B is stored in a pickling tank 2, which is also formed sealed to the outside. From the mordant tank 2, a pickling agent supply line 21 leads to the nozzle arrangement 11 in the pickling booth 1.
  • the pickling agent B is conveyed to the nozzle arrangement 1 by means of a feed pump 22.
  • a collecting means 12 for dripping pickling agent B is arranged at the bottom below the pickling basket A.
  • the collecting means 12 leads in a suitable gradient the impinging liquids to a collecting point 12 provided at the collection point 13, from which a return line 14 leads into the mordant tank 2.
  • the same feed pump 22 of the pickling supply line 21 is provided for the return conveyance of the pickling agent B.
  • shut-off valves 211, 212, 141, 142 are provided in the associated lines 21 and 14, respectively.
  • a first gas displacement line 23 with a shut-off valve 231 is provided between the mordant tank 2 and the pickling booth 1.
  • a flushing water tank 3 is shown, is stored in the rinse water C.
  • a feed pump 32 is provided in the supply line 31.
  • Rinsing water dripping from the pickling goods A is conducted via collection means 12 to the collection point 13 and conveyed back there via a return delivery line 15 into the rinsing water tank 3.
  • the return delivery via return line 15 is also performed via the feed pump 32.
  • corresponding shut-off valves 311, 312, 151, 152 are provided in the associated lines 31 and 15, respectively.
  • a second gas displacement line 33 is provided between the flushing water tank 3 and the pickling booth 1, which has an associated shut-off valve 331.
  • a mist nozzle arrangement 16 with a feed line 17 is arranged above the nozzle arrangement 11 in the pickling booth 1.
  • the supply line leads fresh water D to the pickling 1.
  • a shut-off valve 171 is provided in the supply line 17.
  • the pickling booth 1 is loaded with the items to be picked, for example, in a pickling basket A. For larger objects, these can also be set directly into the pickling booth 1. Possibly. the stains are degreased before the pickling process.
  • all shut-off valves 141, 142, 151, 152, 171, 211, 212, 231, 311, 312, 331 are closed and the feed pumps 22, 23 are not activated.
  • pickling booth 1 is closed and the pickling process started.
  • the shut-off valves 211, 212 of the supply line 21 are opened.
  • the shut-off valve 231 of the gas displacement line 23 is opened and the Feed pump 22 controlled.
  • pickling agent B is conveyed from the mordant tank 2 via the supply line 21 to the nozzle assembly 11 in the pickling booth 1.
  • the pickling agent B is finely sprayed in the so-called Spritzbeizclar on the nozzle assembly 1 and sprayed onto the underlying, to be addressed items A.
  • the rinsing process is activated.
  • the shut-off valves 31 and 312 of the feed conveyor line 31 and the shut-off valve 331 of the second gas-discharge line 33 are opened and the feed pump 32 started.
  • rinse water C is supplied from the rinsing water tank 3 via the Spülwasserzu slaughtertechnisch 31 of the nozzle assembly 1 in the pickling 1.
  • a part of the supply line of the pickling agent supply is preferably also used together in order to discharge aggressive pickling agent B already in the supply line 21, 31 via the nozzle arrangement 11.
  • a check valve 153 is also provided in the return line 15 in order to prevent uncontrolled backflow of the rinse water C into the pickling booth 1.
  • the pickling cabin 1 can be opened and the pickled objects are removed. Possibly. an operator can spray the stained and rinsed workpieces with high pressure water. Due to the good cleaning effect and the air washing can be completely dispensed with in this work on a suction. It is particularly important that a pickling agent without nitric acid is used as a mordant, since the use of a mordant with nitric acid forming nitrous gases can not be washed out with water from the air.

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  • 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)
EP04010403A 2003-05-13 2004-05-03 Anlage und Verfahren zum Beizen von Gegenständen aus Stahl Expired - Lifetime EP1477583B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04010403T PL1477583T3 (pl) 2003-05-13 2004-05-03 Urządzenie i sposób wytrawiania przedmiotów ze stali

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10321411A DE10321411B4 (de) 2003-05-13 2003-05-13 Anlage und Verfahren zum Beizen von Gegenständen aus Stahl
DE10321411 2003-05-13

Publications (2)

Publication Number Publication Date
EP1477583A1 EP1477583A1 (de) 2004-11-17
EP1477583B1 true EP1477583B1 (de) 2007-10-17

Family

ID=33016365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04010403A Expired - Lifetime EP1477583B1 (de) 2003-05-13 2004-05-03 Anlage und Verfahren zum Beizen von Gegenständen aus Stahl

Country Status (4)

Country Link
EP (1) EP1477583B1 (pl)
AT (1) ATE376081T1 (pl)
DE (2) DE10321411B4 (pl)
PL (1) PL1477583T3 (pl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3168329A1 (de) 2015-11-12 2017-05-17 Siedentop GmbH Beizverfahren und beizanlage
WO2021058044A1 (de) 2019-09-26 2021-04-01 Siedentop Gmbh Automatisierte beizzeitwahl

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103245549B (zh) * 2013-05-10 2014-12-24 西安航空动力股份有限公司 一种单晶叶片晶粒度腐蚀装置
CN103643245B (zh) * 2013-10-31 2017-02-15 湖北侨光石化装备股份有限公司 雾化酸碱综合处理槽

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB483138A (en) * 1937-10-14 1938-04-12 Ferdinand Baeuml Improvements in air-extraction and condensation plants for exhausting acid vapours from pickling and brass-dipping plants or the like
GB873432A (en) * 1958-01-06 1961-07-26 Modernair Processes Ltd Improvements relating to the treatment of metal and other surfaces with liquids
US3785387A (en) * 1972-07-20 1974-01-15 Northrop Corp Chemical processing facility
DE3715168C3 (de) * 1987-05-07 1994-04-28 Hoeckh Metall Reinigungs Anlag Einrichtung zum Trocknen von Gegenständen in Reinigungsanlagen
JP2824282B2 (ja) * 1989-07-14 1998-11-11 ヤマハ発動機株式会社 表面処理装置
US5180438A (en) * 1989-10-11 1993-01-19 Hockh Metall-Reinigungsanlagen Gmbh Cleaning and drying system
DE4117760C1 (en) * 1991-05-31 1992-12-10 Metallglanz Gmbh Electrolytically surface treating tube in treatment tank - using covered tanks connected by flexible pipes, with air exhausted through pipes preventing uncontrolled escape of vapour
DE4411163A1 (de) * 1994-03-30 1995-10-05 Kurt M Dr Ing Pohl Verfahren zur Behandlung von Teilen oder Komponenten durch Besprühen und/oder Überfluten mit einem Lösemittel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3168329A1 (de) 2015-11-12 2017-05-17 Siedentop GmbH Beizverfahren und beizanlage
WO2021058044A1 (de) 2019-09-26 2021-04-01 Siedentop Gmbh Automatisierte beizzeitwahl

Also Published As

Publication number Publication date
DE10321411B4 (de) 2005-12-01
EP1477583A1 (de) 2004-11-17
DE502004005239D1 (de) 2007-11-29
PL1477583T3 (pl) 2008-03-31
DE10321411A1 (de) 2004-12-09
ATE376081T1 (de) 2007-11-15

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