EP1280619A1 - Procede pour nettoyer des barres de cuivres oxydees, laminees a chaud - Google Patents

Procede pour nettoyer des barres de cuivres oxydees, laminees a chaud

Info

Publication number
EP1280619A1
EP1280619A1 EP01943060A EP01943060A EP1280619A1 EP 1280619 A1 EP1280619 A1 EP 1280619A1 EP 01943060 A EP01943060 A EP 01943060A EP 01943060 A EP01943060 A EP 01943060A EP 1280619 A1 EP1280619 A1 EP 1280619A1
Authority
EP
European Patent Office
Prior art keywords
descaling
reduction
liquid
cooling
reducing agent
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.)
Withdrawn
Application number
EP01943060A
Other languages
German (de)
English (en)
Inventor
Michael Schwarze
Herbert Berendes
Jürgen JACOB
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP1280619A1 publication Critical patent/EP1280619A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C43/00—Devices for cleaning metal products combined with or specially adapted for use with machines or apparatus provided for in this subclass
    • 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
    • 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
    • B21B45/08—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 hydraulically
    • 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
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • 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
    • 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
    • B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
    • 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
    • B21B45/0203—Cooling
    • B21B45/0206—Coolants
    • 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
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
    • 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
    • B21B45/0239—Lubricating
    • B21B45/0242—Lubricants
    • 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

Definitions

  • the invention relates to a method for cleaning oxidized, hot-rolled copper rods (copper wire rod) which, after casting, emerge from a rolling mill connected downstream thereof in a continuously operating continuous casting device and which have oxidized layers on their surface when they emerge from the rolling mill.
  • the invention relates to the controlled cooling and cleaning of the cast and rolled rod before it is wound up and / or subjected to a drawing treatment for producing fine wire.
  • the strand leaving the casting device is generally immediately hot rolled.
  • the rod As the rod is exposed to the atmosphere, it oxidizes and scale forms on the surface, which is a mixture of copper oxide CuO (red) and copper oxide Cu 2 0 (black).
  • CuO red
  • Cu 2 0 black
  • These oxides must be removed or converted back to the metallic state before the rod can be subjected to a drawing treatment to produce a tradable wire product. The removal of the oxides is also necessary to prevent premature wear of the drawing tools and the like.
  • copper is intended to include copper alloys in the present context.
  • This process is characterized by high investment costs and high operating costs, which result from the need to use acid-resistant materials and to avoid ecological problems associated with the emission of spent acids.
  • oxide scale can be removed by first exposing the rod to reducing gases or vapors at high temperature and then immediately quenching it in a cooling bath before exposing the rod to the atmosphere.
  • gas reduction appears to have some advantages over acid pickling, there are certain disadvantages to gas reduction.
  • the gases or vapors designated as suitable for reducing copper rods are flammable, toxic, or both, and therefore require special handling to avoid the risk of explosion or suffocation or the like.
  • oxygen-free atmospheres of elevated temperature must be provided, which requires special seals.
  • Another disadvantage of the gas reduction processes consists in the fact that the reaction rates are considerably slower than in the processes in which a liquid is brought into contact with the strand.
  • aqueous solutions consisting of alcohols, ketones or amine compounds were used, which are used to reduce the said oxides.
  • the surface quality achieved measured as the residual oxide layer thickness of the cooled end product, depends to such an extent on the reagents used, the product throughput rate and the reaction rate, so that these reduction lines by no means reach the values of an acid pickle.
  • metal strips are electrolytically pickled, two successive containers filled with aqueous electrolytes being provided and cathodic treatment being carried out in the first container and anodic treatment in the second container.
  • the invention is based on the object of specifying a method by means of which the oxidic surface layers in copper rods can be removed in a particularly simple and advantageous manner without the use of acidic solutions.
  • This object is achieved according to the invention in a method for cleaning oxidized, rolled copper bars which, after casting, emerge from a rolling mill connected downstream thereof in a continuously operating continuous caster and which have oxidic layers on their surface when they leave the rolling mill, in that the roll strand initially already is wetted in the hot rolling process with an emulsion to which a hydrocarbon-containing reducing agent has been added in order to at least prevent oxidation of the hot rolling strand during the rolling process.
  • the oxidized, finished-rolled rod is then passed through one or more reduction zones at a temperature of approximately 650 ° C., a dilute, aqueous hydrocarbon-containing solution being used as the reduction liquid (s) in the reduction zone (s).
  • the amount of reducing liquid used in the descaling section is limited to approx. 10% to 35% of the total circulating amount of the liquid for the descaling and cooling section.
  • the oxidized layers of the rod will be converted to metal.
  • the non-acidic, liquid reducing agent is continuously recirculated, cooled and the pH value and the chemical composition of the recirculating reducing agent are kept constant.
  • the speed of the chemical reactions taking place to reduce the two types of oxide present is so intensified by generating a bath turbulence by means of one or more ultrasound sources that the surface quality is improved and the length of the reduction zone is reduced.
  • the rolled rod is cooled intensively with a large amount of the reducing liquid and before the deoxidized rod is coated with a wax to protect it from renewed oxidation, the rod is dried by means of mechanical and compressed-air strippers.
  • this is achieved by the turbulent flow of the pickling medium generated by means of the ultrasonic transducers, these operating in the frequency range from 20-3000 kHz.
  • the method according to the invention is to be explained below using a system shown in the drawings.
  • Fig. 1 in the upper part is a schematic side view of a system
  • Fig. 4 details of the cooling section.
  • the shaft melting furnace is designated by 2 in FIG. This is preceded by a charging device, by means of which the feed is fed to the furnace.
  • the charging and melting are monitored from the main furnace control room 3.
  • the melt leaving the shaft melting furnace passes through a holding furnace 4 into a double-belt casting machine 5, the monitoring and control of the casting process taking place in the control station 6. Downstream of the casting machine are a driving device 7, a pendulum shear 8 and an edge milling machine 9.
  • the rolling mill and 10 the cooling and descaling section which is explained in detail in the remaining figures, are designated by 10.
  • At the end of the system there is a winding layer 12, a ring formation chamber 13 and a coil carriage 14.
  • a crane 15 is used to move the coils.
  • an emulsion system 16 which has an automatic emulsion filter, a cleaner circulation system 17, an oil circulation system 18, the cooling water sump 19 for the casting machine, the hydraulic system 20, the electrics 21, with the transformer room 23 and finally the workshop 24th
  • the cooling section 11 is shown enlarged in FIG.
  • mechanical wipers 24, cooling pipes 25, cooling nozzles 26 and air wipers 27 are provided along the cooling section.
  • FIG. 3 shows - again enlarged - the ultrasonic transducers 28 arranged between the mechanical stripper 24 and the cooling nozzle 26, by means of which the reducing liquid in the cooling section 11 is moved intensively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé pour nettoyer des barres de cuivres oxydées, laminées à chaud qui, après avoir été coulées dans une installation de coulée continue, sortent d'un laminoir situé en aval de cette dernière et qui, à la sortie du laminoir, présentent des couches oxydées au niveau de leurs surfaces. Ce procédé est caractérisé, entre autres, en ce que l'on fait passer la barre oxydée, déjà laminée, à travers une ou plusieurs zones de réduction, à des températures d'environ 650 °C ; on introduit une solution aqueuse diluée, renfermant des hydrocarbures, dans la ou les zones de réduction en tant que liquide de réduction ; on augmente la vitesse des réactions chimiques pour la réduction des deux types d'oxyde présents, par production d'une turbulence dans le bain au moyen d'une ou plusieurs sources d'ultrasons.
EP01943060A 2000-05-10 2001-05-08 Procede pour nettoyer des barres de cuivres oxydees, laminees a chaud Withdrawn EP1280619A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10023480 2000-05-10
DE10023480A DE10023480A1 (de) 2000-05-10 2000-05-10 Verfahren zum Säubern oxidierter, warmgewalzter Kupferstäbe
PCT/DE2001/001791 WO2001087509A1 (fr) 2000-05-10 2001-05-08 Procede pour nettoyer des barres de cuivres oxydees, laminees a chaud

Publications (1)

Publication Number Publication Date
EP1280619A1 true EP1280619A1 (fr) 2003-02-05

Family

ID=7641919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01943060A Withdrawn EP1280619A1 (fr) 2000-05-10 2001-05-08 Procede pour nettoyer des barres de cuivres oxydees, laminees a chaud

Country Status (8)

Country Link
US (1) US20020134400A1 (fr)
EP (1) EP1280619A1 (fr)
JP (1) JP2003533591A (fr)
KR (1) KR20020040746A (fr)
CN (1) CN1372497A (fr)
DE (1) DE10023480A1 (fr)
MX (1) MXPA01013159A (fr)
WO (1) WO2001087509A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007022928A1 (de) 2006-05-26 2007-12-13 Sms Demag Ag Vorrichtung zum Herstellen eines Metallbandes durch Stranggießen
KR101146853B1 (ko) 2007-05-01 2012-05-16 신닛뽄세이테쯔 카부시키카이샤 강판의 세정 방법 및 강판의 연속 세정 장치
AT520084B1 (de) * 2017-10-03 2019-01-15 Primetals Technologies Austria GmbH Verfahren zum Betrieb einer Gieß-Walz-Verbundanlage und Gieß-Walz-Verbundanlage
DE102019216261A1 (de) * 2019-07-02 2021-01-07 Sms Group Gmbh Verfahren zur Steuerung einer Kühleinrichtung in einer Walzstraße
CN110670082B (zh) * 2019-10-18 2024-06-18 南京华新有色金属有限公司 铜杆非酸洗系统、铜杆非酸洗方法及铜杆生产系统
CN117773744B (zh) * 2024-02-28 2024-05-07 云南万登铜业有限公司 一种铜杆生产冷却表面残渣冲刷装置

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GB894048A (en) * 1959-10-12 1962-04-18 British Oxygen Co Ltd Manufacture and treatment of wires
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GB1424325A (en) * 1972-06-20 1976-02-11 Bicc Ltd Manufacture of copper rod
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JPS54148164A (en) * 1978-05-12 1979-11-20 Fujikura Ltd Scale removing hot rolled copper material
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US4233830A (en) * 1978-11-14 1980-11-18 Secim Method for the continuous production of a bright copper rod by the rolling of stock obtained from a continuous casting apparatus
US4401479A (en) * 1981-03-12 1983-08-30 Quick Nathaniel R Apparatus and method for processing wire stand cable for use in prestressed concrete structures
US4754803A (en) * 1987-02-02 1988-07-05 Phelps Dodge Industries, Inc. Manufacturing copper rod by casting, hot rolling and chemically shaving and pickling
US4899798A (en) * 1988-11-28 1990-02-13 Southwire Company Method of and apparatus for recovering and reusing organic pickling vapors
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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
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Title
See references of WO0187509A1 *

Also Published As

Publication number Publication date
CN1372497A (zh) 2002-10-02
KR20020040746A (ko) 2002-05-30
DE10023480A1 (de) 2001-11-15
US20020134400A1 (en) 2002-09-26
WO2001087509A1 (fr) 2001-11-22
JP2003533591A (ja) 2003-11-11
MXPA01013159A (es) 2002-09-02

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