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ES456482A1 - Method of removing multi layered coating and apparatus for practicing the method - Google Patents

Method of removing multi layered coating and apparatus for practicing the method

Info

Publication number
ES456482A1
ES456482A1 ES456482A ES456482A ES456482A1 ES 456482 A1 ES456482 A1 ES 456482A1 ES 456482 A ES456482 A ES 456482A ES 456482 A ES456482 A ES 456482A ES 456482 A1 ES456482 A1 ES 456482A1
Authority
ES
Spain
Prior art keywords
objects
soln
coating
organic chemical
ultrasonic field
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
Application number
ES456482A
Other languages
Spanish (es)
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Publication of ES456482A1 publication Critical patent/ES456482A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/005—Preliminary treatment of scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B25/00—Obtaining tin
    • C22B25/06—Obtaining tin from scrap, especially tin scrap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

Removal of multiple coatings consisting of >=1 outer organic chemical coating and an inner metal coating from metal objects is described. The objects are treatd in a first soln. in which they are subjected to an ultrasonic field which more or less removes the outer organic chemical coating. The objects are then treated in a second soln. which removes the inner metal coating. Process is esp. sued for treating lacquered tinplate waste. The rate of detinning as well as the amt. of Sn recovered is increased. The metal objects are cooled to a brittle temp. and the non-ferrous particles born by the ferrous objects or fragments are removed in their cooled state by a magnetic device or a vibrating or shock mechanism. The organic chemical coating is a paint or a varnish e.g. acrylic or phenolic. The soln. for removing the Sn-based coating contains NaOH. The objects may also be subjected to an ultrasonic field whilst they are in or passing through the caustic soln. The ultrasonic field acting on the objects in the first or second soln. may comprise two different frequencies. The first soln. may be aq. and contg. a liq. degreasing agent e.g. an alkaline detergent.
ES456482A 1976-03-04 1977-03-03 Method of removing multi layered coating and apparatus for practicing the method Expired ES456482A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB861176 1976-03-04

Publications (1)

Publication Number Publication Date
ES456482A1 true ES456482A1 (en) 1978-05-01

Family

ID=9855820

Family Applications (2)

Application Number Title Priority Date Filing Date
ES456482A Expired ES456482A1 (en) 1976-03-04 1977-03-03 Method of removing multi layered coating and apparatus for practicing the method
ES466905A Expired ES466905A1 (en) 1976-03-04 1978-02-11 Method of removing multi layered coating and apparatus for practicing the method

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES466905A Expired ES466905A1 (en) 1976-03-04 1978-02-11 Method of removing multi layered coating and apparatus for practicing the method

Country Status (10)

Country Link
JP (1) JPS52128934A (en)
AU (1) AU2274477A (en)
BE (1) BE852010A (en)
DE (1) DE2709515A1 (en)
ES (2) ES456482A1 (en)
FR (1) FR2343059A1 (en)
IT (1) IT1073282B (en)
NL (1) NL7702333A (en)
SE (1) SE7702353L (en)
ZA (1) ZA771005B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013692B1 (en) * 1978-12-21 1982-03-24 sma Shredder-Müll Aufbereitung Schrott Maschinen Abbruch GmbH Apparatus for the selective separation of non-ferromagnetic metals from a mixture of metallic scrap particles of about uniform size
FR2493190A1 (en) * 1980-10-30 1982-05-07 Ben Rais Abdelfettah Removing lacquer and varnish from metals - esp. from scrap tinplate, by ultrasonic dissolution in mixt. of methanol, ethanol, soda and di:chloro:methane
FR2529105A1 (en) * 1982-06-24 1983-12-30 Centre Rech Fer Blanc Iron and tin recovery esp. from scrap - by carbonylation of iron content
DE3937442A1 (en) * 1989-11-10 1991-05-16 Nokia Unterhaltungselektronik METHOD FOR AREA REMOVAL OF LAYERS FROM A SUBSTRATE
DE4013969C1 (en) * 1990-04-30 1991-11-14 Rolf Emil 6688 Illingen De Roland
US5106467A (en) * 1990-10-05 1992-04-21 Armco Steel Company, L.P. Alkaline leaching of galvanized steel scrap
NL9002193A (en) * 1990-10-09 1992-05-06 Leto Recycling Bv METHOD AND APPARATUS FOR PROCESSING WASTE.
NL9500302A (en) * 1995-02-17 1996-10-01 Hoogovens Staal Bv Method for removing at least a coating from metal scrap parts coated with a coating.
DE19512550C1 (en) * 1995-04-06 1996-06-20 Lindemann Maschfab Gmbh Method and device for processing containers
EP2569455A1 (en) * 2010-05-10 2013-03-20 Proassort GmbH Chemical pretreatment and preheating of steel scrap
CN112792057A (en) * 2021-01-21 2021-05-14 深圳市万来升科技有限公司 Depainting recovery equipment for waste metal
DE102022107082A1 (en) 2022-03-25 2023-09-28 Johannes Wissing Process for the treatment of waste materials and installation for the treatment

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH356974A (en) * 1957-12-27 1961-09-15 Usag Ultraschall Ag Process for cleaning bodies partially provided with coating layers by means of ultrasonic vibrations
FR1256191A (en) * 1960-03-24 1961-03-17 Goldschmidt Ag Th Process for the de-tinning of offcuts covered with lacquer
DE1137559B (en) * 1961-01-07 1962-10-04 Goldschmidt Ag Th Pretreatment of used containers to be detinned, such as garbage cans
US3168477A (en) * 1961-07-17 1965-02-02 Vulcan Materials Co Delacquering process
FR1496440A (en) * 1966-10-12 1967-09-29 Goldschmidt Ag Th Varnished tinplate stripping process
DE1908503B1 (en) * 1969-02-20 1971-03-11 Goldschmidt Ag Th METHOD FOR TINNING TINNED IRON SHEET

Also Published As

Publication number Publication date
BE852010A (en) 1977-07-01
NL7702333A (en) 1977-09-06
DE2709515A1 (en) 1977-09-15
FR2343059A1 (en) 1977-09-30
JPS52128934A (en) 1977-10-28
IT1073282B (en) 1985-04-13
AU2274477A (en) 1978-09-07
ES466905A1 (en) 1978-10-01
SE7702353L (en) 1977-09-05
ZA771005B (en) 1977-12-28

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