DE4401243A1 - Electrochemical metal extn. from electronic scrap - Google Patents

Electrochemical metal extn. from electronic scrap

Info

Publication number
DE4401243A1
DE4401243A1 DE19944401243 DE4401243A DE4401243A1 DE 4401243 A1 DE4401243 A1 DE 4401243A1 DE 19944401243 DE19944401243 DE 19944401243 DE 4401243 A DE4401243 A DE 4401243A DE 4401243 A1 DE4401243 A1 DE 4401243A1
Authority
DE
Germany
Prior art keywords
electronic scrap
extn
solid
metal
metals
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Withdrawn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
DE19944401243
Other languages
German (de)
Inventor
Rolf Prof Dr Bertram
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19944401243 priority Critical patent/DE4401243A1/en
Publication of DE4401243A1 publication Critical patent/DE4401243A1/en
Withdrawn legal-status Critical Current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
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C22B7/007—Wet processes by acid leaching
    • 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

Abstract

In the electrochemical leaching of metals from electronic scrap, the extn. interfaces between the solid metal-contg. components and the liq. ionically conductive electrolyte are anodically polarised pref. by a current supply electrode immersed in and/or in contact with the solids-liq. mixt.

Description

Bei der naßchemischen Trennung werden die metallischen Komponenten aus Verbundstoffgemischen in der Regel durch Säuren herausgelöst, in denen Redoxpartner als aktivierende Zusätze enthalten sind. Säuren und Zusätze haben die Funktion, die bei der ionischen Auflösung von Metallen auftretenden Elektronen zu absorbieren. Diese klassisch-chemische Extraktion versagt bei schwerlöslichen Metallen und Metallegierungen und geht mit einem hohen Verbrauch an Säuren und an oxidierenden Reagenzien einher. Ein Recycling der verwendeten Chemikalien zur Verminderung der Entsorgungsprobleme ist bei umweltverträg­ licher Prozeßführung nur in mehreren Verfahrensschritten und unter Aufwand erheblicher Energiemengen möglich.In wet chemical separation, the metallic Components made from composite mixtures are usually acidic extracted in which redox partners as activating additives are included. Acids and additives have the function that the ionic dissolution of metals occurring electrons absorb. This classic chemical extraction fails poorly soluble metals and metal alloys and goes with a high consumption of acids and oxidizing reagents hand in hand. A recycling of the chemicals used Reducing the disposal problems is environmentally friendly Licher litigation only in several process steps and possible with considerable amounts of energy.

Es ist bekannt, die Auslaugung der metallischen Komponenten durch elektrische Beeinflussung der Grenzflächenreaktion zu aktivieren. Eine naßelektrochemische Aufbereitung von Elektronikschrott beruht auf den Prinzipien der anodischen Auflösung und der kathodischen Abscheidung von Metallen. Die elektrochemisch bewirkten Auflösungs- und Abscheidungsprozesse sind unterschiedlich gehemmt, so daß durch Wahl der Strom- Spannungsbedingungen eine Selektion der Metalle nach dem Grad der Elektronegativität möglich ist.It is known to leach out the metallic components by electrically influencing the interface reaction activate. A wet electrochemical treatment of Electronic scrap is based on the principles of anodic Dissolution and the cathodic deposition of metals. The electrochemically induced dissolution and deposition processes are inhibited differently, so that by choosing the current Stress conditions a selection of the metals according to the degree electronegativity is possible.

Der entscheidende Verfahrens schritt besteht erfindungsgemäß darin, Elektronikschrott in kompakter oder zerkleinerter Form (Granulat, geshreddert und/oder gemahlen) in geeigneten elektrochemischen Reaktoren (DREIDIMENSIONALE ELEKTRODEN) anodisch zu laugen.The crucial process step is according to the invention in electronic waste in compact or shredded form (Granules, shredded and / or ground) in suitable electrochemical reactors (THREE-DIMENSIONAL ELECTRODES) to leach anodically.

Um eine technisch bedeutsame Laugungsrate zu erzielen,To achieve a technically significant leach rate,

  • - ist unter Beachtung hinreichender Strömungsbedingungen die Kontaktfläche zwischen fluider und fester Phase möglichst groß zu wählen,- is the under consideration of sufficient flow conditions Contact surface between the fluid and solid phase if possible great to choose
  • - ist der nichtleitende Teil des Granulats (z. B. faserver­ stärkter Kunststoff) nach Ablösung der Metalle aus dem Reaktor zu entfernen,- is the non-conductive part of the granulate (e.g. fibrous stronger plastic) after detachment of the metals from the To remove reactor
  • - ist der elektrische Kontakt zur Spannungsquelle z. B. über geeignete Feeder-Elektroden, die in das Granulatbett eintauchen oder dasselbe umgeben, zu gewährleisten.- Is the electrical contact to the voltage source z. B. about suitable feeder electrodes placed in the granule bed immerse or surround the same.

Bei einem Granulat mit geringem Metallanteil ist der erforderliche Kontakt z. B. durch Zumischung von leitenden Partikeln (Kohlegries, Metallspäne) zu erreichen.In the case of granules with a low metal content, the required contact z. B. by admixing conductive Particles (grit, metal chips) to reach.

Eine andere Möglichkeit besteht in der gemeinsamen Verpressung solcher Mischungen zu Anodenbarren, die in geeigneten Elektroly­ seuren selektiv in Lösung gehen. Auch die kathodische Abscheidung des Metallraffinats kann selektiv erfolgen.Another possibility is to press together such mixtures to anode bars, which in suitable electroly selectively go into solution. Even the cathodic The metal raffinate can be deposited selectively.

Claims (5)

1. Verfahren zur elektrochemischen Laugung von Metallen aus Elektronikschrott, dadurch gekennzeichnet, daß die für die Extraktion bestimmenden Grenzflächen zwischen festen metallhaltigen Komponenten und fluiden ionisch leitenden Elektrolyten anodisch polarisiert werden.1. A process for the electrochemical leaching of metals from electronic scrap, characterized in that the interfaces between solid metal-containing components and fluid ionically conductive electrolytes which are determining for the extraction are polarized anodically. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Polarisierung durch stromführende Elektroden erfolgt, die in das Fest-Flüssig-Gemisch eintauchen und/oder dasselbe kontaktierend umschließen.2. The method according to claim 1, characterized in that the polarization is carried out by live electrodes, immersed in the solid-liquid mixture and / or the same enclose in contact. 3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß dem Fest-Flüssig-Gemisch stromleitende Partikel zur Kontaktverbesserung zugesetzt werden.3. The method according to claims 1 and 2, characterized characterized in that the solid-liquid mixture is electrically conductive Particles are added to improve contact. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß Elektronikschrott in Form von verpreßten Anodenbarren eingesetzt wird.4. The method according to claim 1, characterized in that Electronic scrap in the form of pressed anode bars is used. 5. Verfahren nach den vorstehenden Ansprüchen, dadurch gekennzeichnet, daß Relativbewegungen zwischen Elektroden, metallhaltigen Komponenten und Elektrolyten ausgelöst werden.5. The method according to the preceding claims, characterized characterized in that relative movements between Electrodes, metal-containing components and electrolytes to be triggered.
DE19944401243 1994-01-18 1994-01-18 Electrochemical metal extn. from electronic scrap Withdrawn DE4401243A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19944401243 DE4401243A1 (en) 1994-01-18 1994-01-18 Electrochemical metal extn. from electronic scrap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944401243 DE4401243A1 (en) 1994-01-18 1994-01-18 Electrochemical metal extn. from electronic scrap

Publications (1)

Publication Number Publication Date
DE4401243A1 true DE4401243A1 (en) 1995-07-20

Family

ID=6508111

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19944401243 Withdrawn DE4401243A1 (en) 1994-01-18 1994-01-18 Electrochemical metal extn. from electronic scrap

Country Status (1)

Country Link
DE (1) DE4401243A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997049836A1 (en) * 1996-06-21 1997-12-31 Enpar Technologies Inc. Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores
DE10231228B4 (en) * 2002-07-11 2004-09-30 Guido Koschany Recovery of valuable materials from spark plugs and glow plugs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997049836A1 (en) * 1996-06-21 1997-12-31 Enpar Technologies Inc. Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores
DE10231228B4 (en) * 2002-07-11 2004-09-30 Guido Koschany Recovery of valuable materials from spark plugs and glow plugs

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee