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NO772799L - EXTRACTION OF METALLIC LEAD, LEAD COMPOUNDS AND PLASTIC MATERIALS FROM WASTE ACCUMULATORS - Google Patents

EXTRACTION OF METALLIC LEAD, LEAD COMPOUNDS AND PLASTIC MATERIALS FROM WASTE ACCUMULATORS

Info

Publication number
NO772799L
NO772799L NO772799A NO772799A NO772799L NO 772799 L NO772799 L NO 772799L NO 772799 A NO772799 A NO 772799A NO 772799 A NO772799 A NO 772799A NO 772799 L NO772799 L NO 772799L
Authority
NO
Norway
Prior art keywords
plastic
pitch
separated
lead
inert
Prior art date
Application number
NO772799A
Other languages
Norwegian (no)
Inventor
John Philip Cestaro
Ranna Krishna Hebbar
Uriel Sokolov
Original Assignee
Nl Industries Inc
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
Priority claimed from US05/729,430 external-priority patent/US4042177A/en
Application filed by Nl Industries Inc filed Critical Nl Industries Inc
Publication of NO772799L publication Critical patent/NO772799L/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/54—Reclaiming serviceable parts of waste accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0217—Mechanical separating techniques; devices therefor
    • B29B2017/0237—Mechanical separating techniques; devices therefor using density difference
    • B29B2017/0244—Mechanical separating techniques; devices therefor using density difference in liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/04—Lead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/84—Recycling of batteries or fuel cells

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Secondary Cells (AREA)

Description

Foreliggende oppfinnelse vedrbrer en fremgangsmåte for gjenvinning av blyforbindelser og plastmateriale fra skrotete akkumulatorbatterier som inneholder inert materiale. The present invention relates to a method for recycling lead compounds and plastic material from scrap accumulator batteries that contain inert material.

Skrotete akkumulatorbatterier blir i alminnelighet samlet og behandlet efter forskjellige metoder for å gjenvinne metallisk bly, blyoxyd og sulfatforbindelsene. I alminnelighet inneholder de skrotete akkumulatorbatterier elektrodegittere av bly eller bly-antimonlegeringer, elektriske ledere og poler i alminnelighet fremstilt av bly-antimonlegeringer og pasta som inneholder blyoxyder og blysulfat. Efter at blyforbindelsene er gjenvunnet blir resten av batteriene i alminnelighet vraket som fyllmateriale. Scrap accumulator batteries are generally collected and treated using various methods to recover metallic lead, lead oxide and the sulphate compounds. In general, the scrap accumulator batteries contain electrode grids of lead or lead-antimony alloys, electrical conductors and poles generally made of lead-antimony alloys and pastes containing lead oxides and lead sulfate. After the lead compounds have been recovered, the rest of the batteries are generally scrapped as filling material.

De gjenværende deler er bl.a. batteriskillevegger og separatorer, i alminnelighet fremstilt av papir, fiberglass eller lignende, og batterikasser, fremstilt av enten hård-gummi eller plastforbindelser. The remaining parts are i.a. battery partitions and separators, generally made of paper, fiberglass or the like, and battery boxes, made of either hard rubber or plastic compounds.

Forbruket av bly til akkumulatorbatterier oker fra år til år, og derfor er det blitt viktig å behandle brukte blyakkumu-latorbatterier for å gjenvinne metallisk bly, blyoxyder og sulfatpaster fra batteriene for ny anvendelse. I tillegg er det også bnskelig å gjenvinne plastinnholdet fra batteriene fordi plastkasser idag anvendes i bkende mengde. Batteri-kassene av plast er i alminnelighet fremstilt av polypropy-len og copolymerer av dette. The consumption of lead for accumulator batteries increases from year to year, and therefore it has become important to treat used lead accumulator batteries in order to recover metallic lead, lead oxides and sulphate pastes from the batteries for new use. In addition, it is also desirable to recover the plastic content from the batteries because plastic boxes are used in increasing quantities today. The plastic battery cases are generally made from polypropylene and copolymers thereof.

Foreliggende oppfinnelse vedrbrer en fremgangsmåte for gjen vinning av blyforbindelsene og plastmaterialet fra skrotete akkumulatorbatterier som inneholder inert materiale hvorved de skrotete akkumulatorbatterier knuses til deler med en storrelse på mindre enn 7»5cm, bitene tilfores til en vandig suspensjon av et magnetisk granulært materiale hvor tettheten i den vandige suspensjon er slik at blyforbindelsene presipiteres mens de inerte forbindelser som inneholder plastmaterialet forblir i suspensjon. Blyforbindelsene skilles fra suspensjonen og det magnetiske granulære materiale separeres magnetisk fra de inerte komponenter i suspensjonen, hvorefter plastmaterialet fjernes ved flotasjon i vandig medium fra de gjenværende inerte forbindelser for å gjenvinne plastmaterialet o The present invention relates to a method for recovering the lead compounds and the plastic material from scrap accumulator batteries that contain inert material, whereby the scrap accumulator batteries are crushed into parts with a size of less than 7"5 cm, the pieces are added to an aqueous suspension of a magnetic granular material where the density in the aqueous suspension is such that the lead compounds are precipitated while the inert compounds containing the plastic material remain in suspension. The lead compounds are separated from the suspension and the magnetic granular material is magnetically separated from the inert components in the suspension, after which the plastic material is removed by flotation in an aqueous medium from the remaining inert compounds to recover the plastic material o

Ved fremgangsmåten ifolge foreliggende oppfinnelse blir de skrotete akkumulatorbatterier fbrst knust til små biter, fortrinsvis til storrelser mindre enn 7»5cm, og det metalliske bly eller bly-antimonlegeringen, blyoxydet og blysulfatpast-ene gjenvinnes fra de inerte bestanddeler, som omfatter hård-gummi og plastbatterikasser, skillevegger, separatorer, papir og annet inaktivt materiale» In the method according to the present invention, the scrap accumulator batteries are first crushed into small pieces, preferably to sizes smaller than 7"5 cm, and the metallic lead or the lead-antimony alloy, the lead oxide and the lead sulfate pastes are recovered from the inert components, which include hard rubber and plastic battery boxes, partitions, separators, paper and other inactive material"

For å gjenvinne bly og plastforbindelsene blir de knuste biter, tilsatt til en vandig suspensjon av et magnetisk granulært materiale med en sp. vekt mindre enn den sp. vekt til det metalliske bly, blyoxyd og blysulfat. Blyforbindelsene bunnfelles i karet mens det inerte materiale inklusive plastmaterialet forblir i suspensjon. To recover lead and the plastic compounds, the crushed pieces are added to an aqueous suspension of a magnetic granular material with a sp. weight less than that sp. weight to the metallic lead, lead oxide and lead sulphate. The lead compounds settle in the vessel while the inert material including the plastic material remains in suspension.

Suspensjonen fremstilles ved å tilsette granulær magnetittmalm til vann og suspendere malmpartiklene i vannet ved om-rbring. Tilstrekkelig magnetittmalm anvendes for å fremstille en suspensjon som har en sp. vekt fra ca. 1,75 til ca. 3»5 g/cm og med en gjennomsnittlig partikkelstorrélse på mindre enn 0,147 mm. En rekke typer av magnetisk materiale kan anvendes for å fremstille suspensjonen, men forskjellige malm-er som magnetitter og ilmenitter er særlig foretrukket å an-vende fordi at disse er både billige og lett tilgjengelige. Efter at det metalliske bly og blyforbindelsene er skilt fra suspensjonen, skilles den granulære magnetittmalm fra det inerte materiale og plasten ved magnetisk separasjon. The suspension is produced by adding granular magnetite ore to water and suspending the ore particles in the water by stirring. Sufficient magnetite ore is used to produce a suspension having a sp. weight from approx. 1.75 to approx. 3»5 g/cm and with an average particle size of less than 0.147 mm. A number of types of magnetic material can be used to produce the suspension, but different ores such as magnetites and ilmenites are particularly preferred to use because these are both cheap and easily available. After the metallic lead and the lead compounds are separated from the suspension, the granular magnetite ore is separated from the inert material and the plastic by magnetic separation.

Plasten og det inerte materiale som er igjen, adskilles fra hverandre i vann ved flottering av det plastiske materiale fra det inerte materiale som synker til bunns. The plastic and the inert material that remains are separated from each other in water by floating the plastic material from the inert material that sinks to the bottom.

Ved foreliggende fremgangsmåte gjenvinnes opp til 95% av blyforbindelsene og opp til 95% av plastmaterialet som fin-nes i batteriene. With the present method, up to 95% of the lead compounds and up to 95% of the plastic material found in the batteries are recovered.

Når batterier som inneholder bek som tettemiddel anvendes i gjenvinningsprosessen, blir bekmaterialet gjenvunnet sammen med plastmaterialet og i de fleste tilfeller bor det skilles fra plastmaterialet for dette resirkuleres» When batteries containing pitch as a sealant are used in the recycling process, the pitch material is recovered together with the plastic material and in most cases it must be separated from the plastic material for this to be recycled."

En rekke industrielle batterier og noen automobilbatterier anvender en asfaltbekforbindelse for forsegling av cellene til batterikassen. Selv om mengden av bek som fjernes sammen med plasten bare er ca. 5 til 10%, vil beken smelte når pla'stén males, og de malte plastbiter blir belagt med bek-materiale. Det smeltede bek forurenser også måleutstyret. A number of industrial batteries and some automotive batteries use an asphalt pitch compound to seal the cells to the battery case. Although the amount of pitch that is removed together with the plastic is only approx. 5 to 10%, the pitch will melt when the plastic is ground, and the ground plastic pieces will be coated with pitch material. The molten pitch also contaminates the measuring equipment.

En rekke fremgangsmåter kan anvendes for å adskille beket fra plastmaterialet, som nedenfor beskrevet: Efter at plastmaterialet er fjernet fra det inerte materiale som beskrevet ovenfor blir det bekinneholdende plastmateriale plasert i en alkohol-vannblanding med en spesifikk vekt på mindre enn 0,95»Fortrinsvis kan enhver billig alkohol anvendes, for eksempel etanol eller metanol. Bekpartiklene som har en spesifikk vekt på minst 1,05. synker til bunns i karet, og plastmaterialet forblir flytende på overflaten. Plastmaterialet adskilles fra beket, og derefter fra ålkohol-vannopplosningen, som resirkuleres. A number of methods can be used to separate the pitch from the plastic material, as described below: After the plastic material has been removed from the inert material as described above, the pitch-containing plastic material is placed in an alcohol-water mixture with a specific gravity of less than 0.95" Preferably any cheap alcohol can be used, for example ethanol or methanol. The pitch particles that have a specific gravity of at least 1.05. sinks to the bottom of the tub, and the plastic material remains floating on the surface. The plastic material is separated from the pitch, and then from the alcohol-water solution, which is recycled.

En annen fremgangsmåte for å fjerne beket fra plastmaterial et er å fryse blandingen og tilsette den.frosne blanding til vann. Ved denne fremgangsmåte blir det frosne bek over-fort til en glasslignende tilstand som synker til bunns i karet, og plastpartiklene flyter på toppen og adskilles fra bekpartiklene. Another method of removing pitch from plastic material is to freeze the mixture and add the frozen mixture to water. With this method, the frozen pitch quickly becomes a glass-like state which sinks to the bottom of the vessel, and the plastic particles float on top and are separated from the pitch particles.

Samme adskillelse kan utfores ved å tilsette bek- og plastpartiklene til vann med en temperatur under 7»2°C, som over-forer beket til en glassaktig tilstand og derved bevirker at beket synker til bunns i karet, hvorved den flytende plast kan separeres fra de sunkne bekpartikler. The same separation can be carried out by adding the pitch and plastic particles to water with a temperature below 7-2°C, which transfers the pitch to a glassy state and thereby causes the pitch to sink to the bottom of the vessel, whereby the liquid plastic can be separated from the sunken pitch particles.

Beket kan også adskilles fra plastpartiklene ved å tilsette blandingen til vann som er tilsatt et fuktemiddel for å minske overflatespenningen på vannet. Fuktemidlet som er tilsatt, bevirker at overflaten på bekpartiklene blir fuktet,-og derved synker de fuktede'bekpartikler til bunns mens plastpartiklene forblir flytende på vannet. Fuktemidler med en lav HLB verdi foretrekkes. Fuktemidler fremstillet og solgt under varemerkene Aerosol A-102 og Span 40 av henholds-vis American Cyanamid og Atlas Chemical Industry er særlig egnet. The pitch can also be separated from the plastic particles by adding the mixture to water to which a wetting agent has been added to reduce the surface tension of the water. The wetting agent that has been added causes the surface of the pitch particles to be moistened, and thereby the moistened pitch particles sink to the bottom while the plastic particles remain floating on the water. Humectants with a low HLB value are preferred. Humectants manufactured and sold under the trade names Aerosol A-102 and Span 40 by American Cyanamid and Atlas Chemical Industry, respectively, are particularly suitable.

Bekpartiklene kan også fjernes fra plastmaterialet ved å tilsette blandingen til et opplosningsmiddel som opploser beket. Slike opplosningsmidler omfatter xylene, toluen, trikloretylen og andre opplosningsmidler som er billige og lett tilgjengelige. The pitch particles can also be removed from the plastic material by adding the mixture to a solvent that dissolves the pitch. Such solvents include xylene, toluene, trichlorethylene and other solvents which are cheap and readily available.

Blandingen av plast og bekpartikler kan også adskilles fra hverandre ved å tilfore blandingen til en vibrasjonssikt, fortrinsvis lett skrånende. På grunn av forskjell i elasti-sitet av plast og bekpartiklene vil plastpartiklene sprette av vibrasjonssikten et lite stykke for enden av sikten, mens bekpartiklene vil falle av ved enden av sikten. Dette gjor at plast- og bekpartiklene kan oppsamles hver for seg når partiklene forlater vibrasjonssikten. The mixture of plastic and pitch particles can also be separated from each other by feeding the mixture to a vibrating sieve, preferably slightly inclined. Due to the difference in the elasticity of plastic and the pitch particles, the plastic particles will bounce off the vibrating sieve a short distance before the end of the sieve, while the pitch particles will fall off at the end of the sieve. This means that the plastic and pitch particles can be collected separately when the particles leave the vibrating screen.

Hvilken som helst av disse fremgangsmåter eller en kombina-sjon kan anvendes for å adskille bekpartiklene fra plastmaterialet. Plastmaterialet som fåes og som :inneholder bare' små mengder bek kan derefter males og anvendes for resirku-lering. Any one of these methods or a combination can be used to separate the pitch particles from the plastic material. The plastic material that is obtained and which only 'contains' small amounts of pitch can then be ground and used for recycling.

Claims (1)

1. Fremgangsmåte for, gjenvinning av metallisk bly- blyforbindelser og plastmateriale fra det inerte materiale i skrotete akkumulatorbatterier, karakterisert ved at de skrotete batterier knuses, det knuste materiale tilsettes til en vandig suspensjon av et granulært magnetisk materiale for å adskille det inerte materiale og plastmaterialet fra metallisk bly og blyforbindelser, magnetisk separere det magnetiske granulære materiale fra det inerte materiale og plastmaterialet og separere plastmaterialet fra det inerte materiale og eventuelt tilstedeværende bek»1. Method for the recovery of metallic lead-lead compounds and plastic material from the inert material in scrapped accumulator batteries, characterized in that the scrapped batteries are crushed, the crushed material is added to an aqueous suspension of a granular magnetic material to separate the inert material and the plastic material from metallic lead and lead compounds, magnetically separate the magnetic granular material from the inert material and the plastic material and separate the plastic material from the inert material and any pitch present' 2. Fremgangsmåte ifolge krav 1, karakterisert ved knusing av skrotakkumulatorene til biter på mindre enn 7»5 cm, tilsetning av bitene til en vandig suspensjon av et granulært magnetisk materiale hvor tettheten av den vandige suspensjon er slik at metallisk bly og blyforbindelsene bunnsettes i suspensjonen mens de inerte forbindelser inne-holdende plastmaterialet forblir i suspensjonen, adskille det metalliske bly og blyforbindelsene fra suspensjonen, magnetisk separere det granulære magnetiske materiale fra de inerte forbindelser i suspensjonen og fjerne plastmaterialet fra de gjenværende inerte forbindelser ved fIotas jon i vandig medium, hvorefter plastmaterialet skilles fra eventuelt tilstedeværende bek.2. Method according to claim 1, characterized by crushing the scrap accumulators into pieces of less than 7"5 cm, adding the pieces to an aqueous suspension of a granular magnetic material where the density of the aqueous suspension is such that metallic lead and the lead compounds settle in the suspension while the inert compounds containing the plastic material remain in the suspension, separate the metallic lead and the lead compounds from the suspension, magnetically separate the granular magnetic material from the inert compounds in the suspension and remove the plastic material from the remaining inert compounds by flotation in an aqueous medium, after which the plastic material separated from any pitch present. 3. Fremgangsmåte ifolge krav 1-2, karakterisert ved at det magnetiske materiale er granulær magnetittmalm eller ilmenitt»3. Method according to claims 1-2, characterized in that the magnetic material is granular magnetite ore or ilmenite" 1+ . Fremgangsmåte ifolge krav 3»karakterisert ved at det granulære magnetiske materiale er magnetitt.1+. Method according to claim 3" characterized in that the granular magnetic material is magnetite. 5. Fremgangsmåte ifolge krav 4»karakterisert ved at den gjennomsnittlige partikkelstorrelse på den granulære magnetittmalm er -0,147 mm.5. Method according to claim 4" characterized in that the average particle size of the granular magnetite ore is -0.147 mm. 6. Fremgangsmåte ifolge krav 1-5»karakterisert ved at den vandige suspensjon av magnetittmalm har en tetthet fra 1,75 til 3»5 g/cm"<3> .6. Method according to claims 1-5"characterized in that the aqueous suspension of magnetite ore has a density from 1.75 to 3"5 g/cm"<3>. 7. Fremgangsmåte ifolge krav 1-6, karakterisert ved at plastmaterialet skilles fra det inerte materiale, efter at blyinnholdet er fjernet, ved tilsetning av det inerte materiale og plastmaterialet til et vandig medium og separering av plastmaterialet fra det inerte materiale ved setling av det inerte materiale og flottering av plastmaterialet i nevnte medium og fjernelse av plastmaterialet derfra.7. Method according to claims 1-6, characterized in that the plastic material is separated from the inert material, after the lead content has been removed, by adding the inert material and the plastic material to an aqueous medium and separating the plastic material from the inert material by settling the inert material and flotation of the plastic material in said medium and removal of the plastic material therefrom. 8. Fremgangsmåte ifolge krav 1-7»karakterisert ved at plasten adskilles fra tilstedeværende bek ved at plast og bek tilsettes til en alkohol-vannblanding med en spesifikk vekt mindre enn 0,975 hvorved beket synkes til bunns mens plasten flyter på overflaten og kan adskilles fra den sunkne bek.8. Method according to claims 1-7" characterized in that the plastic is separated from the pitch present by adding plastic and pitch to an alcohol-water mixture with a specific gravity less than 0.975 whereby the pitch sinks to the bottom while the plastic floats on the surface and can be separated from it sunken pitches. 9. Fremgangsmåte ifolge krav 1-7, karakterisert ved at plasten skilles fra tilstedeværende bek ved å fryse plast og bek for å overfore beket til en glassaktig tilstand og tilsette den frosne plast og bek til vann hvorved det glassaktige bek synker til bunns mens plasten flyter på overflaten og adskilles fra beket. 10o Fremgangsmåte ifolge krav 1-7» karakterisert ved at plasten skilles fra tilstedeværende bek ved tilsetning av plast og bek tillvann med en temperatur på mindre enn 7»2°C, hvorved beket forandres til en glassaktig tilstand og synker til bunns mens plasten flyter på overflaten og kan adskilleso9. Method according to claims 1-7, characterized in that the plastic is separated from the pitch present by freezing the plastic and pitch to transfer the pitch to a glassy state and adding the frozen plastic and pitch to water whereby the glassy pitch sinks to the bottom while the plastic floats on the surface and separates from the pitch. 10o Process according to claims 1-7" characterized in that the plastic is separated from the pitch present by adding plastic and pitch to water with a temperature of less than 7"2°C, whereby the pitch changes to a glassy state and sinks to the bottom while the plastic floats on the surface and can separateso 11. Fremgangsmåte ifolge krav 1-7»karakterisert ved at plasten skilles fra tilstedeværende bek ved å tilsette plast og bek til et opplosningsmiddel som opplbser beket, hvorefter plasten fjernes fra opplosningen.11. Method according to claims 1-7" characterized in that the plastic is separated from the pitch present by adding plastic and pitch to a solvent which dissolves the pitch, after which the plastic is removed from the solution. 12. Fremgangsmåte ifolge krav 1-7»karakterisert ved at plasten skilles fra tilstedeværende bek ved å tilsette plast og bek til vann, tilsatt et fuktemiddelv hvorved beket fuktes av fuktemidlet og synker til bunns mens plasten forblir flytende på overflaten og kan adskilles fra det sunkne bek.12. Method according to claims 1-7" characterized in that the plastic is separated from the pitch present by adding plastic and pitch to water, with a wetting agent added, whereby the pitch is moistened by the wetting agent and sinks to the bottom while the plastic remains floating on the surface and can be separated from the sunken pitch. 13. Fremgangsmåte ifolge krav 1 - 7*karakterisert ved at plasten adskilles fra tilstedeværende bek ved at blandingen av plast og bek anbringes på en vibrasjonssikt hvor beket oppsamles nær utlbpsenden av sikten mens den mer elastiske plast oppsamles i noe avstand fra siktenden.13. Method according to claims 1 - 7* characterized in that the plastic is separated from the pitch present by placing the mixture of plastic and pitch on a vibrating sieve where the pitch is collected near the outlet end of the sieve while the more elastic plastic is collected at some distance from the sieve end.
NO772799A 1976-10-04 1977-08-10 EXTRACTION OF METALLIC LEAD, LEAD COMPOUNDS AND PLASTIC MATERIALS FROM WASTE ACCUMULATORS NO772799L (en)

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Application Number Priority Date Filing Date Title
US05/729,430 US4042177A (en) 1976-10-04 1976-10-04 Recovery of metallic lead, lead compounds and plastic material from scrap storage batteries
US77750277A 1977-03-14 1977-03-14
US78799477A 1977-04-15 1977-04-15

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JP (1) JPS5344401A (en)
CA (1) CA1070266A (en)
DE (1) DE2736425A1 (en)
DK (1) DK361977A (en)
ES (1) ES461534A1 (en)
GB (1) GB1558230A (en)
IT (1) IT1077425B (en)
NL (1) NL7708987A (en)
NO (1) NO772799L (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200535A (en) * 1981-06-05 1982-12-08 Hakuyuu Shoji Kk Preparation of metal lead from waste lead material
CA2102678C (en) * 1992-11-09 2003-06-10 Victor Emul Ross Thermal sorting
RU2186625C2 (en) * 2000-05-11 2002-08-10 ОАО "Тюменский аккумуляторный завод" Hydrodynamic separator for separation of light fraction from storage battery scrap
ITMI20051806A1 (en) * 2005-09-28 2007-03-29 Engitec Technologies S P A SYSTEM AND METHOD OF HANDLING OF LEADS WITH LEAD
AU2009200812B2 (en) * 2008-02-28 2010-03-25 Vincent Huang Battery recycling
JP7585059B2 (en) * 2021-01-27 2024-11-18 古河電気工業株式会社 How to recycle bipolar batteries

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SE7709058L (en) 1978-04-05
NL7708987A (en) 1978-04-06
ES461534A1 (en) 1978-08-16
DK361977A (en) 1978-04-05
DE2736425A1 (en) 1978-04-06
IT1077425B (en) 1985-05-04
JPS5344401A (en) 1978-04-21
CA1070266A (en) 1980-01-22
GB1558230A (en) 1979-12-19

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