EP0914217B1 - Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees - Google Patents

Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees Download PDF

Info

Publication number
EP0914217B1
EP0914217B1 EP98913270A EP98913270A EP0914217B1 EP 0914217 B1 EP0914217 B1 EP 0914217B1 EP 98913270 A EP98913270 A EP 98913270A EP 98913270 A EP98913270 A EP 98913270A EP 0914217 B1 EP0914217 B1 EP 0914217B1
Authority
EP
European Patent Office
Prior art keywords
air
airwipe
cleaning
metal surface
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.)
Expired - Lifetime
Application number
EP98913270A
Other languages
German (de)
English (en)
Other versions
EP0914217A4 (fr
EP0914217A1 (fr
Inventor
Milton Edward Berry
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.)
Southwire Co LLC
Original Assignee
Southwire Co LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwire Co LLC filed Critical Southwire Co LLC
Publication of EP0914217A1 publication Critical patent/EP0914217A1/fr
Publication of EP0914217A4 publication Critical patent/EP0914217A4/fr
Application granted granted Critical
Publication of EP0914217B1 publication Critical patent/EP0914217B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/005—Copper or its alloys

Definitions

  • the present invention generally relates to an apparatus and method for reducing consumption of alcohol used in cleaning oxidized hot metal surfaces.
  • the invention can be employed in an apparatus for continuous cleaning or pickling of cast and rolled copper rod.
  • Hot-rolled copper or copper alloy rod used in the manufacture of wire is usually formed into coils for convenient handling.
  • the rod accumulates a surface scale or oxide when exposed to the atmosphere, and this scale should be completely removed before the rod is used in the manufacture of wire.
  • alcohol is often used to chemically reduce the oxidized surface of continuously cast and rolled hot copper and copper alloy metal products.
  • Such alcohol is in an aqueous solution typically of about 3% alcohol.
  • small quantities of the alcohol solution remain on the surface of the moving rod, and are usually removed with on or more blasts of air provided by an "airwipe" apparatus.
  • alcohol droplets removed from the rod as a result of the airwipe drain into a solution recovery tank for further disposition and/or recycling and reuse.
  • the present invention generally relates to an apparatus and method for reducing the consumption of alcohol used in cleaning oxidized hot metal surfaces. More particularly, the invention accomplishes that function in a method and apparatus for continuously quench-pickling cast and rolled copper and copper alloy rod in a continuous casting and rolling process. Essentially, the invention accomplishes the desired objective by providing a liquid trap in the drain line between the airwipe enclosure or box and the storage or recovery tank. This liquid trap separates the airwipe air from the liquid alcohol solution according to the typical function of a water trap.
  • the amount of alcohol solution contacted by the airwipe air is only that small amount of alcohol solution which is carried over from the pickling or cleaning tube into the airwipe, and the small surface of the liquid trap.
  • the airwipe air discharged via the normal vent tubes from the airwipe box may still require treatment by condensation of the alcohol or thermal destruction of the alcohol.
  • the quantity of alcohol carried by this air is insignificant compared to the total amount of alcohol being used and the amount of volatile alcohol carried out of the recovery tank by the air discharged into the tank in the prior art apparatus.
  • FIG. 1 is a diagrammatic representation of an apparatus for the pickling or cleaning of continuously cast and rolled rod in accordance with the present invention.
  • the apparatus 10 comprises a cleaning pipe or tube 12 and various spray boxes 14a-14h positioned at predetermined intervals along the length of the pipe 12, as well as a drain box 16 positioned at an intermediate point along the pipe 12.
  • the apparatus 10 also includes an airwipe assembly 17 with a plurality of airwipe boxes 18 disposed at the downstream end of the pipe 12, as well as pinch rolls 22 through which the rod passes prior to being delivered to a conventional rod coiler (not shown).
  • the apparatus 10 includes a storage or recovery tank 20 connected to the airwipe boxes 18 of the airwipe assembly 17 via one or more drains employing a liquid trap 19.
  • the rod being processed passes through the pipe 12, and successively past spray boxes 14a-14h.
  • Spray boxes 14a-14h spray the rod with a cleaning solution (e.g., a 3% aqueous alcohol solution), and the drain box 16 is provided at an intermediate point of the pipe 12 for draining off excess solution.
  • a cleaning solution e.g., a 3% aqueous alcohol solution
  • the rod Once the rod passes through each of the spray boxes 14a-14h, it enters the first airwipe box 18 where it is subjected to a blast of air at a pressure of from about 1 atm. to about 10 atm. for the purpose of removing solution droplets from the surface of the rod. These droplets are drained off via liquid trap 19 to storage or recovery tank 20. The resulting rod, with the alcohol droplets removed, passes between pinch rolls 22 and is conveyed to a rod coiler (not shown) where it is formed into coils for further disposition or transport.
  • a rod coiler not shown
  • air preferably enters the pipe 12 in such a manner as to flow in a direction opposite, i.e., countercurrent, to the direction of travel of the metal rod.
  • the blast of air introduced into pipe 12 passes through a relatively small gap between the airwipe housing and the outer surface of the metal rod, effectively removing droplets of cleaning solution from the surface of the metal rod in the process.
  • the droplets of cleaning solution fall to the bottom of the airwipe boxes 18 and are drained through trap 19 into storage or recovery tank 20.
  • FIG. 2 illustrates one airwipe box 18 employed in the apparatus of Figure 1
  • Figure 3 is an end view of that box taken along line III-III of Figure 2 showing the liquid trap 19 in accordance with the present invention.
  • airwipe box 18 includes air vent pipes 30 and 32, a threaded rod guide 34 mounted on the upstream side of box 18 with a slotted nut 34a, a conventional airwipe 36, liquid drain pipes 38 and 40, rod exit opening 42, and an air inlet 44 connected to the airwipe 36.
  • the metal rod enters airwipe box 18 via guide 34 and passes from left to right in Figure 2, emerging from box 18 via exit opening 42.
  • An air blast is injected into airwipe 36 via air inlet 44.
  • the air blast is directed circumferentially about the rod and flows in a direction from right to left in Figure 2, that is, in a direction opposite to the direction of travel of the metal rod.
  • a liquid trap 19 is connected to drain pipes 38 and 40.
  • the liquid trap 19 is preferably in the shape of oppositely connected U-shaped tubes according to a common design of water traps.
  • air cannot escape through pipe 40 due to the fact that liquid solution collected in the trap fills the trap 19 to some level indicated by the dashed lines 56 in Figure 3.
  • liquid collected in the trap 19 prevents the air in box 18 from exhausting through drain pipes 38 and 40, flowing into tank 20, and disadvantageously removing volatile alcohol from tank 20.
  • the present invention achieves substantial savings in the overall cleaning process because of the retention of most of the collected cleaning solution.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (14)

  1. Appareil (10) pour réduire la consommation de composants volatiles d'une solution utilisée dans le nettoyage d'une surface métallique oxydée, comprenant:
    un moyen d'essuyage à l'air (17, 18; 36) pour appliquer un souffle d'air à la surface métallique de manière à enlever les gouttelettes de ladite solution utilisée dans le nettoyage de la surface métallique oxydée;
    un moyen de drainage (16; 38, 40) pour transporter les gouttelettes enlevées loin de la surface métallique;
    un moyen de récupération (20) relié audit moyen de drainage (16; 38, 40) pour recevoir les gouttelettes enlevées qui ont été transportées loin de la surface métallique;
       caractérisé par la réalisation d'un moyen de capture (19) disposé dans ledit moyen de drainage (16; 38, 40) pour empêcher l'échappement d'air à partir dudit moyen d'essuyage à air (17, 18; 36) vers ledit moyen de récupération (20).
  2. L'appareil (10) de la revendication 1, dans lequel ledit moyen de capture comprend un piège à liquide (19) incluant une première portion reliée au dit moyen de drainage (38, 40) et s'étendant dans une direction vers le bas, une seconde portion reliée à une extrémité de ladite première portion éloignée dudit moyen de drainage et s'étendant dans une direction vers le haut, et une troisième portion reliée à une extrémité de ladite seconde portion éloignée de ladite première portion et s'étendant dans la direction vers le bas.
  3. L'appareil (10) de la revendication 1, incluant une pluralité (17) desdits moyens d'essuyage à l'air (18; 36), chaque moyen d'essuyage à l'air (18; 36) possédant un moyen de capture (19) dans le moyen de drainage (19; 38, 40) relié au moyen de récupération (20).
  4. L'appareil (10) de la revendication 1, dans lequel ladite solution de nettoyage est de l'alcool aqueux.
  5. L'appareil (10) de la revendication 1, dans lequel ladite surface métallique est une surface de barre en cuivre.
  6. L'appareil (10) de la revendication 1, dans lequel ledit souffle d'air comprend de l'air à une pression allant d'environ 1 bar (≈ 1 atmosphère) à environ 10 bars (≈ 10 atmosphères).
  7. Un procédé pour réduire la consommation de composants volatiles d'une solution utilisée dans le nettoyage d'une surface métallique oxydée comprenant les étapes consistant à:
    appliquer un souffle d'air à la surface métallique avec un essuyeur à l'air (36) de manière à enlever les gouttelettes de la solution utilisée dans le nettoyage de la surface métallique oxydée;
    collecter les gouttelettes enlevées dans une enceinte (18) entourant l'essuyeur à air (36);
    drainer les gouttelettes collectées à partir de l'enceinte (18) à travers un drain (38, 40; 19) et vers un réservoir de stockage (20);
       caractérisé par la réalisation d'un moyen de capture (19) entre ladite enceinte (18) et ledit réservoir de stockage (20) pour empêcher l'échappement d'air à partir de ladite enceinte (18) vers ledit réservoir de stockage (20).
  8. Le procédé de la revendication 7, dans laquelle ladite étape d'empêchement comprend la réalisation d'un piège à liquide (19) dans le drain (19; 38, 40) entre l'enceinte (18) et le réservoir de stockage (20).
  9. La méthode de la revendication 8, dans laquelle ladite étape d'empêchement comprend en outre la collecte des gouttelettes enlevées dans le piège à liquide (19) de manière à bloquer l'échappement d'air vers le réservoir de stockage (20).
  10. Le procédé de la revendication 7, dans lequel ledit souffle d'air comprend de l'air à une pression allant d'environ 1 bar (≈1 atmosphère) à environ 10 bars (≈ 10 atmosphères).
  11. Appareil (10) pour nettoyer une surface métallique oxydée d'une barre métallique coulée de manière continue et laminée comprenant un canal de nettoyage (12) à travers lequel ladite barre se déplace, un moyen (14) pour introduire une solution de nettoyage possédant des composants volatiles dans le canal (12) en contact avec la surface métallique de la barre, un moyen d'essuyage à air (17) en aval du canal (12) pour essuyer la solution de la surface de la barre avec un souffle d'air, un moyen (18) pour collecter la solution essuyée de la surface de la barre, un réservoir (20) pour stocker la solution collectée, et un moyen de drainage (38, 40; 19) pour drainer la solution à partir du moyen de collecte (18) dans le réservoir (20),
       caractérisé par un moyen de capture (19) disposé dans le moyen de drainage pour empêcher l'air de s'écouler à partir du moyen d'essuyage à air (17, 18; 36) vers le réservoir (20) et d'emporter les composants volatiles de la solution de nettoyage dans le réservoir (20).
  12. L'appareil (10) de la revendication 11, dans lequel ledit souffle d'air comprend de l'air à une pression allant d'environ 1 bar (≈ 1 atmosphère) à environ 10 bars (≈ 10 atmosphères).
  13. L'appareil (10) de la revendication 11, dans lequel ladite barre métallique est une barre en cuivre.
  14. L'appareil (10) de la revendication 11, dans lequel ladite solution de nettoyage est de l'alcool aqueux.
EP98913270A 1997-03-27 1998-03-26 Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees Expired - Lifetime EP0914217B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US82624597A 1997-03-27 1997-03-27
US826245 1997-03-27
PCT/US1998/006206 WO1998042456A1 (fr) 1997-03-27 1998-03-26 Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees

Publications (3)

Publication Number Publication Date
EP0914217A1 EP0914217A1 (fr) 1999-05-12
EP0914217A4 EP0914217A4 (fr) 2000-07-12
EP0914217B1 true EP0914217B1 (fr) 2003-10-22

Family

ID=25246067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98913270A Expired - Lifetime EP0914217B1 (fr) 1997-03-27 1998-03-26 Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees

Country Status (3)

Country Link
EP (1) EP0914217B1 (fr)
DE (1) DE69819108T2 (fr)
WO (1) WO1998042456A1 (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194565A (en) * 1938-03-05 1940-03-26 Kennecott Wire And Cable Compa Device and method for cleaning or drying wire and other strand material
US3270364A (en) * 1964-08-12 1966-09-06 Maurice G Steele Air wipe device for wire
US3433683A (en) * 1967-01-06 1969-03-18 Ohio Crankshaft Co Heat treating method
US3620853A (en) * 1969-11-25 1971-11-16 Anaconda Wire & Cable Co Descaling copper rods
GB1323308A (en) * 1970-11-19 1973-07-11 Z Tashkent Kabel Method of reduction of an oxidized surface of copper or its alloys
GB1424325A (en) * 1972-06-20 1976-02-11 Bicc Ltd Manufacture of copper rod
BE843167A (fr) * 1975-06-24 1976-10-18 Refroidissement et decapage d'un fil machine lamine en continu
JPS5474232A (en) * 1977-11-25 1979-06-14 Furukawa Electric Co Ltd:The Surface cleaning of copper material
US4391016A (en) * 1980-10-14 1983-07-05 Kabushiki Kaisha Kobe Seiko Sho Degreasing apparatus for elongated materials
JPS5773189A (en) * 1980-10-27 1982-05-07 Furukawa Electric Co Ltd:The Method for continuous descaling of copper type rolled and roughly drawn wire
US4591390A (en) * 1981-03-25 1986-05-27 Shell Internationale Research Maatschappij B. V. Cable cleaning system
JPS5825482A (ja) * 1981-08-05 1983-02-15 Hitachi Seisen Kk 荒引線の洗浄方法
US4461654A (en) * 1982-03-09 1984-07-24 Wire Lab Company Method for removing scale dust from steel rod after mechanical descaling
US4899798A (en) * 1988-11-28 1990-02-13 Southwire Company Method of and apparatus for recovering and reusing organic pickling vapors
JPH03240982A (ja) * 1990-02-19 1991-10-28 Showa Electric Wire & Cable Co Ltd 銅製押出成型品の製造法

Also Published As

Publication number Publication date
DE69819108D1 (de) 2003-11-27
WO1998042456A1 (fr) 1998-10-01
EP0914217A4 (fr) 2000-07-12
DE69819108T2 (de) 2004-07-15
EP0914217A1 (fr) 1999-05-12

Similar Documents

Publication Publication Date Title
US3806366A (en) Continuous pickling of cast rod
EP0406348B1 (fr) Tubage pour liquide de refroidissement dans un separateur electrostatique
EP0914217B1 (fr) Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees
US5743939A (en) Waste gas processing apparatus and method for semiconductor fabricating equipment
KR20070056939A (ko) 용제 회수 시스템
WO1998042456A9 (fr) Appareil et procede de reduction de l'alcool utilise dans le decapage de surfaces metalliques chaudes oxydees
AU613251B2 (en) Method of and apparatus for recovering and reusing organic pickling vapors
EP1736229A1 (fr) Dispositif et procédé de séparation de condensat
JP3211718B2 (ja) 金属材料の酸洗方法
AT404472B (de) Verfahren zur nachbehandlung von gebeiztem stahlband
US20040079398A1 (en) Process and apparatus for pickling metal strips
DE3106873A1 (de) Verfahren zur nutzung der bei eindickprozessen von fluessigkeiten entstehenden brueden
DE4407367C2 (de) Verfahren zur kontinuierlichen Kabelherstellung mit Kühlwasserreinigung und Anlage zur Durchführung des Verfahrens
JPH0841667A (ja) 金属帯材の洗浄方法
GB1562589A (en) Electrotinning process and apparatus
EP0523576B1 (fr) Procédé et installation de fabrication de barres métalliques par coulée continue
DE19925967C2 (de) Verfahren zum Reinigen eines einen Fremdstoff enthaltenden Gases
EP0458789B1 (fr) Procede et dispositif pour la separation de solvants et d'huiles
JP2000080486A (ja) 熱延鋼帯の酸洗設備列および酸洗方法
EP4069886B1 (fr) Appareil de rinçage et son utilisation
JPH11106971A (ja) 金属薄板の洗浄方法および洗浄装置
DE3936363C2 (fr)
DE60310789T2 (de) Verfahren zur Behandlung von Abgasen aus einer Anlage zur Herstellung einer Vorform für optische Fasern
FI59739C (fi) Foerfarande foer kombinerad avkylning av rening av koppargjutstaenger
DE19902320C2 (de) Verfahren und Vorrichtung zur Nachbehandlung von gebeiztem Stahlband

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19981218

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

RIC1 Information provided on ipc code assigned before grant

Free format text: 7B 08B 1/02 A, 7C 23G 5/00 B

A4 Supplementary search report drawn up and despatched

Effective date: 20000524

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 20020502

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20031022

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69819108

Country of ref document: DE

Date of ref document: 20031127

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040122

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040723

EN Fr: translation not filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20170327

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20170324

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20170329

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69819108

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20180325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20180325