EP0961842A1 - Vorrichtung und verfahren zum kontinuierlichen chemischen entzundern von metallband - Google Patents
Vorrichtung und verfahren zum kontinuierlichen chemischen entzundern von metallbandInfo
- Publication number
- EP0961842A1 EP0961842A1 EP98904112A EP98904112A EP0961842A1 EP 0961842 A1 EP0961842 A1 EP 0961842A1 EP 98904112 A EP98904112 A EP 98904112A EP 98904112 A EP98904112 A EP 98904112A EP 0961842 A1 EP0961842 A1 EP 0961842A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- pickling
- liquid nozzles
- nozzles
- running direction
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000126 substance Substances 0.000 title claims abstract description 6
- 238000005554 pickling Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims description 39
- 235000021110 pickles Nutrition 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- ASNHGEVAWNWCRQ-UHFFFAOYSA-N 4-(hydroxymethyl)oxolane-2,3,4-triol Chemical compound OCC1(O)COC(O)C1O ASNHGEVAWNWCRQ-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 description 6
- 230000001154 acute effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
-
- 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
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
Definitions
- the invention relates to an apparatus and a method for the continuous chemical descaling of metal strip in a pickling tank through which the metal strip runs.
- a pickling device is known from DD 266 813 A5, in which the strip runs in the longitudinal direction through a horizontally arranged closed treatment channel, which is arranged inside a container which encloses the treatment channel and is closed by a lid, into which the treatment channel is supplied on the inlet or outlet side Treatment medium can be derived.
- a separate treatment channel is arranged, to which the treatment medium is supplied via nozzle bars arranged on the inlet and outlet sides and associated pumps.
- the pump output required for the pickling intensity that can be achieved is also relatively high here.
- Treated treatment liquid filled treatment container and the treatment liquid is conveyed via pipes and at least one pump-around container in the circuit.
- the treatment liquid is conveyed below the liquid level in the treatment tank by means of jet nozzles above and below the metal strip, directed in opposite directions from both longitudinal sides at an acute angle against the metal strip.
- increasing the pickling intensity requires a relatively high pump output.
- DE 29 11 701 AI discloses a method and an apparatus for the treatment of material webs in a treatment chamber.
- successive, turbulent flows of a gaseous or liquid treatment medium are directed onto the two material web surfaces under pressure at an acute angle and in the opposite direction to the path of the web, in such a way that the web is treated and at the same time through the medium bed that is formed in an approximately horizontal path the treatment chamber is guided.
- the known device has at least one upper and one lower row of treatment nozzles, which are elongated in a direction perpendicular to the direction of travel of the material web are trained.
- Each of the nozzles has a longitudinal slot pointing to the continuous material web, the length of which is at least equal to the width of the material web, the nozzles being designed to move a turbulent medium stream from the slots onto the material web at an acute angle and in a direction opposite to the direction of flow Steer material web.
- a method for pickling metal strip in which the metal strip is passed through a treatment room with at least one inlet and outlet for the treatment medium circulated through the treatment room, the treatment medium under pressure in the form of a directed and Treatment room filling flow and thereby the pressure and speed of the treatment medium are changed.
- the pressure at the inlet point or inlet points is set between 2 and 10 bar and the flow velocity at the outlet point is kept between 10 and 30 m / s.
- the object of the invention is to develop a device and a method with which the pickling intensity can be increased with comparatively low pumping powers.
- the pickling tank can be filled with pickling liquid so that the strip to be pickled is drawn through the pickling liquid.
- the impact jets penetrate the liquid surrounding the belt. The shooting flow is formed 'on the tape then in each case under the covering them liquid layer of the stain.
- the liquid nozzles are preferably formed in the bottom and lid of the pickling tank.
- the liquid nozzles can be formed in the electrodes, the tubular electrodes serve as a lead for the pickle to the liquid nozzles.
- the liquid nozzles can be formed in tubular strips arranged in the spaces between the electrodes, via which the pickling can be fed to the liquid nozzles.
- the liquid nozzles are preferably arranged regularly, in particular in a plurality of rows lying one behind the other and running transversely from row to row to the tape running direction, the liquid nozzles of successive rows being offset transversely to the tape running direction.
- the transverse displacement of the liquid nozzles in rows one behind the other is in particular half a pitch of adjacent impact jets. In this way, with sufficient mutual spacing of the nozzles to form the shooting flow of the impingement jets, the strip can be applied uniformly over its entire width with pickling.
- the rows lying one behind the other in the strip running direction should form outflow channels leading to the strip edges.
- the outflow of the stain in these channels can be favored in that a supporting flow is generated from the belt edges by means of nozzles assigned to the outflow channels.
- liquid nozzles can be switched on and off individually or in groups.
- the invention is explained in more detail below with the aid of a drawing showing exemplary embodiments. Show in detail
- 1 is a pickling tank in cross section perpendicular to the direction of strip travel
- FIG. 7 shows a partial section of a pickling basin in a different embodiment from FIG. 1 in vertical section in the strip running direction with tubular electrodes arranged on the top and bottom.
- FIG. 8 shows a pair of electrodes in section X of FIG. 7 in cross section transverse to the direction of tape travel
- FIGS. 7 and 8 show an electrode according to FIGS. 7 and 8 in an enlarged view
- Fig. 10 shows a partial section of a pickling basin in a different embodiment to Fig. 1 and 7 in vertical section in the tape running direction with plate-shaped electrodes.
- a belt 1 runs through a pickling tank 2 with a bottom 2a and a lid 2b. Both in the bottom 2a and in the lid 2b there are liquid nozzles 3a, 3b which are directed towards the band 1 Beam direction formed. The nozzles 3a, 3b are fed with pickling via feed lines 3c, 3d.
- the pickling tank 2 is not necessarily but preferably filled with pickling liquid to such an extent that the strip 1 is immersed therein. By immersing the strip 1 in the pickling liquid, the pickling effect on the top and bottom of the strip 1 is evened out.
- Each of the nozzles 3a, 3b is designed as a full jet nozzle according to FIG. 2.
- a stagnation zone SZ is formed, from which a shooting flow SS radially emerges, for which it is characteristic that a wave W forms at the end.
- the pressure with which the nozzle 3a, 3b is acted upon, its outlet diameter, its distance from the surface of the strip 1 and the thickness of the pressure which is established on the surface are essential for the formation of the shooting flow SS
- Liquid layer The thicker the liquid layer, the greater the pressure and / or the nozzle cross section and / or the smaller the distance.
- FIGS. 3 to 5 show different geometrical arrangements of the individual liquid nozzles. All versions have in common that the nozzles are arranged in rows one behind the other, the areas of the flowing flow SS of the nozzles of each row overlapping one another.
- the center points of the nozzles of each row lie on a line perpendicular to the tape running direction R and are offset from row to row by half a pitch of adjacent nozzles
- the centers of successive nozzles on a line slightly inclined to the direction of strip travel R.
- the centers of the juxtaposed nozzles are also on a line that is inclined to the tape running direction.
- the inclination of the center line of successive nozzles to the tape running direction results in a geometrical displacement of the nozzles from row to row in the tape running direction and thus a more uniform distribution of the impact jets of the tape surface.
- FIG. 3 the center points of the nozzles of each row lie on a line perpendicular to the tape running direction R and are offset from row to row by half a pitch of adjacent nozzles
- the centers of successive nozzles on a line slightly inclined to the direction of strip travel R.
- the centers of the juxtaposed nozzles are also on a line that is inclined to the tape running direction.
- the centers of the nozzles of rows lying one behind the other are offset by half a pitch of adjacent rows.
- the lines on which the center points of the nozzles of every second row lying one behind the other can be slightly inclined to the tape running direction R.
- an outflow channel A is left between the individual rows of nozzles for the pickling agent drain to the strip edges, as is indicated by the arrows between the rows of nozzles.
- the outflow channels A are provided on the side next to the belt 1, and nozzles which promote the outflow of pickling agent and drive pickling agent into the outflow channels A.
- FIGS. 7 to 9 In the exemplary embodiment of FIGS. 7 to 9, above and below the belt 1, transverse to the belt running direction and at a distance from one of the tubular electrodes EL in the belt running direction, in which nozzle openings 3a are indicated by arrows (FIG. 8) or specifically (FIG. 9) , 3b are formed.
- the pickling is fed to the nozzle openings 3a, 3b via the tubular electrodes EL.
- electrodes E are arranged in the pickling tank 2 above and below the strip 1 at a distance from one another in the strip running direction.
- tubular strips L In the spaces between electrodes E, tubular strips L are arranged, in which nozzle openings 3a, 3b are indicated by arrows, to which the stain is fed via the tubular strips L.
- the nozzle openings 3a, 3b, via which the impact jets act on the belt 1, can be accommodated in a space-saving manner.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702639A DE19702639C1 (de) | 1997-01-25 | 1997-01-25 | Vorrichtung und Verfahren zum kontinuierlichen chemischen Entzundern von Metallband |
| DE19702639 | 1997-01-25 | ||
| PCT/EP1998/000323 WO1998032899A1 (de) | 1997-01-25 | 1998-01-22 | Vorrichtung und verfahren zum kontinuierlichen chemischen entzundern von metallband |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0961842A1 true EP0961842A1 (de) | 1999-12-08 |
| EP0961842B1 EP0961842B1 (de) | 2002-10-30 |
Family
ID=7818327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98904112A Expired - Lifetime EP0961842B1 (de) | 1997-01-25 | 1998-01-22 | Vorrichtung und verfahren zum kontinuierlichen chemischen entzundern von metallband |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0961842B1 (de) |
| JP (1) | JP2001508833A (de) |
| AT (1) | ATE226984T1 (de) |
| DE (2) | DE19702639C1 (de) |
| ES (1) | ES2186125T3 (de) |
| WO (1) | WO1998032899A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19947857A1 (de) * | 1999-10-05 | 2001-05-03 | Thyssenkrupp Stahl Ag | Beizanlage für Metallbänder |
| JP3394753B2 (ja) | 2000-12-12 | 2003-04-07 | 日野自動車株式会社 | 鋼板洗浄装置 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2031036B (en) * | 1978-10-10 | 1982-11-03 | Midland Ross Corp | Liquid trestment of metal strip |
| JPS56127799A (en) * | 1980-03-07 | 1981-10-06 | Nippon Steel Corp | Insoluble electrode pad |
| JPS6230892A (ja) * | 1985-07-31 | 1987-02-09 | Sumitomo Special Metals Co Ltd | 長尺金属板の連続洗浄方法 |
| DE3629894A1 (de) * | 1986-08-29 | 1988-03-03 | Mannesmann Ag | Anlage zur oberflaechenbehandlung von kontinuierlich durchlaufenden baendern, insbesondere beizanlage |
| DE4031234C2 (de) * | 1990-10-04 | 1994-02-03 | Gewerk Keramchemie | Verfahren und Vorrichtung zur Oberflächenbehandlung von bandförmigem Behandlungsgut |
| DE4116019C2 (de) * | 1991-05-16 | 1997-01-23 | Sundwiger Eisen Maschinen | Verfahren und Vorrichtung zum Kühlen eines flächenhaften Gutes, insbesondere eines Metallbandes |
| AT399517B (de) * | 1991-08-20 | 1995-05-26 | Andritz Patentverwaltung | Verfahren zur oberflächenbehandlung von im wesentlichen ebenem flächigem gut, insbes. zum beizen von metallband |
| DE4421082A1 (de) * | 1994-06-16 | 1995-12-21 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Intensivierung des Kontaktes zwischen einem Walzband mit einer Flüssigkeit |
| DE4425854C1 (de) * | 1994-07-07 | 1995-11-09 | Mannesmann Ag | Elektrolytisches Oberflächenbehandlungsverfahren und Anlage zur Durchführung des Verfahrens |
-
1997
- 1997-01-25 DE DE19702639A patent/DE19702639C1/de not_active Expired - Fee Related
-
1998
- 1998-01-22 DE DE59806113T patent/DE59806113D1/de not_active Expired - Fee Related
- 1998-01-22 WO PCT/EP1998/000323 patent/WO1998032899A1/de not_active Ceased
- 1998-01-22 EP EP98904112A patent/EP0961842B1/de not_active Expired - Lifetime
- 1998-01-22 JP JP53157198A patent/JP2001508833A/ja active Pending
- 1998-01-22 AT AT98904112T patent/ATE226984T1/de not_active IP Right Cessation
- 1998-01-22 ES ES98904112T patent/ES2186125T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9832899A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2186125T3 (es) | 2003-05-01 |
| DE19702639C1 (de) | 1998-06-18 |
| EP0961842B1 (de) | 2002-10-30 |
| DE59806113D1 (de) | 2002-12-05 |
| WO1998032899A1 (de) | 1998-07-30 |
| ATE226984T1 (de) | 2002-11-15 |
| JP2001508833A (ja) | 2001-07-03 |
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