WO1995005488A1 - Method of reprocessing flat substrates coated with aluminium - Google Patents

Method of reprocessing flat substrates coated with aluminium Download PDF

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Publication number
WO1995005488A1
WO1995005488A1 PCT/DE1994/000946 DE9400946W WO9505488A1 WO 1995005488 A1 WO1995005488 A1 WO 1995005488A1 DE 9400946 W DE9400946 W DE 9400946W WO 9505488 A1 WO9505488 A1 WO 9505488A1
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WIPO (PCT)
Prior art keywords
aluminum
shredded
substrate
metal
coated
Prior art date
Application number
PCT/DE1994/000946
Other languages
German (de)
French (fr)
Inventor
Edmund Sorg
Original Assignee
Edmund Sorg
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 DE4329773A external-priority patent/DE4329773C1/en
Application filed by Edmund Sorg filed Critical Edmund Sorg
Priority to AU74559/94A priority Critical patent/AU7455994A/en
Publication of WO1995005488A1 publication Critical patent/WO1995005488A1/en

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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
    • C22B21/00—Obtaining aluminium
    • C22B21/0007—Preliminary treatment of ores or scrap or any other metal source
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/62—Metallic pigments or fillers
    • C09C1/64—Aluminium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/62—Metallic pigments or fillers
    • C09C1/64—Aluminium
    • C09C1/644—Aluminium treated with organic compounds, e.g. polymers
    • C09C1/646—Aluminium treated with organic compounds, e.g. polymers concomitant with mechanical comminution, shaping or abrasion of the particles

Definitions

  • the invention relates to a process for the reprocessing of aluminum-coated flat substrates, in particular foils, sheets, strips, in one
  • Aluminum granules and a fibrous substrate felt Aluminum granules and a fibrous substrate felt.
  • the said flat substrates are, for example, paper or plastic-laminated or printed or colored aluminum foil waste.
  • Foil waste received treatment may contain dioxin, or in any case pose an environmental hazard. For this reason there are washing systems in the known processes for the exhaust gases required, which are very complex both in terms of acquisition and operation. In addition, their operational reliability can leave nothing to be desired. Another deficiency of these known methods is that the resulting aluminum granules contain combustion products, in particular carbon resulting from the burned or thermally treated substrate, which must be removed from the aluminum granules in a separate device. This also has a disadvantageous effect on the production costs of the aluminum granulate. Another shortcoming of such combustion processes or thermal processes is their energy consumption.
  • the invention has for its object to provide a method of the type mentioned that does not have the above-mentioned shortcomings, i.e. the environmentally friendly and with low energy consumption an optimal separation of the
  • the flat substrates coated with aluminum are therefore in a first
  • the substrates coated with aluminum are chopped into a starting material with dimensions between 1 and 50 mm, preferably between 5 mm and 20 mm.
  • the shredded primary material consists of a mixture of paper-laminated aluminum foil waste, plastic-coated aluminum foil waste and printed or colored aluminum foil waste.
  • 50% by weight of paper-clad aluminum foil wastes with 35% by weight of plastic-clad aluminum foil wastes and 15% by weight of printing or colored aluminum foil wastes can be mixed. Any other mixing ratios are of course also possible.
  • the very special grinding of the shredded primary material by means of the interlocking mechanical systems, which rotate at high speeds, results in a mechanical separation the aluminum coating from the substrate and rolling up the aluminum to the corresponding granulate.
  • the shredded primary material is preferably mechanically ground in such a way that aluminum granules with a grain size of between 20 and 100 ⁇ m, preferably of approximately 400 ⁇ m, and a long-fiber substrate felt result.
  • the long-fiber substrate felt can then advantageously be reused, for example in paper production. That with the inventive
  • Processed aluminum granulate can be mechanically subjected to a fractionation into defined grain fractions and can be reused, for example, as aluminum pigment in the paint industry or the like.
  • pigments can be produced from the aluminum granulate using a grinding device.
  • the said grinding device can e.g. a known ball mill or the like. act.
  • the aluminum granules can be ground to aluminum pigments in a wet medium. Hydrocarbons can be used as the wet medium. It is also possible to grind the aluminum granulate dry. This can e.g. happen in a nitrogen atmosphere.
  • the aluminum granulate is preferably added
  • Aluminum pigments with a size of about 2 to 100 microns, preferably from 2 to 20 microns ground.
  • the thickness of the individual aluminum pigments is on the order of 4 ⁇ m.
  • an aluminum lacquer is obtained which, in a particularly advantageous manner, has a bright metallic finish has a silver-like surface.
  • commercially available aluminum paints only have a comparatively dark aluminum-like surface, ie they show no silver effect.
  • the process according to the invention is thus distinguished by the fact that exhaust gases which are hazardous or harmful to the environment are avoided, that washing plants are not required to remove such exhaust gases, that the energy requirement is comparatively low, that a liquid requirement, as is required in the liquid processes mentioned at the outset, it is not the case that not only the recovered aluminum granulate but also the substrate material in the form of the long-fiber substrate felt produced according to the invention
  • the method according to the invention is briefly explained again below using the block diagram shown in the drawing.
  • the drawing figure clarifies the starting material through block 10.
  • the said starting material is flat substrates coated with aluminum, such as paper or plastic-laminated aluminum foil waste, or printed or colored aluminum foil waste.
  • the starting material 10 is mechanically shredded, which is indicated by the block 12.
  • the primary material resulting from the mechanical shredding has dimensions between 1 and 50 mm, preferably between 5 and 20 mm.
  • the shredded primary material is then mechanically ground by means of interlocking mechanical systems, which is indicated by block 14. During mechanical grinding, the corresponding aluminum granulate is formed, which is indicated by block 16, and at the same time a substrate felt 18, which is illustrated by block 18.
  • the aluminum granulate 16 has a grain size between 20 and 1000 ⁇ m, preferably of approximately 400 ⁇ m.
  • the substrate felt 18 is advantageously relatively long-fiber, so that it is suitable for reuse, for example in paper manufacture, which is indicated by the block 20. Of course, the substrate felt can also be sent to another suitable reuse.
  • the aluminum granulate 16 can be fed to a fractionation, which is illustrated by block 22. Fractionation 22 results in a separation into different grain fractions of the aluminum granulate in a manner known per se.
  • the aluminum granulate can then be ground into pigments which, mixed with a suitable binder, can be reused in the paint industry or the like. This is indicated in the drawing by block 24.
  • Aluminum lacquers produced according to the invention advantageously result in a bright metallic, silver-like surface. Such a silver effect cannot be achieved with the known commercially available aluminum pigments.
  • the invention aluminum granules with different finenesses or grain sizes are obtained in one working process, and in particular the advantage is that the pigments produced from these granules mixed with suitable commercially available binders lead to lacquers which have a metallic bare surface silver-like effect.
  • the capacity of a plant for carrying out the method according to the invention can vary depending on the type of application

Abstract

Described is a method of reprocessing flat substrates, such as foil, sheet or strip, coated with metal, in particular aluminium. The metal is separated from the substrate and granulated. To this end, the invention calls for the metal-coated substrate to be mechanically shredded and the shredded material subsequently ground mechanically in such a way that the metal is detached from the substrate giving granular metal material and fibrous felty substrate material. A pigment is then produced from the granular metal (in the preferred embodiment aluminium). When mixed with a commercially available binder, the aluminium pigment gives a bright, metallic, silvery surface.

Description

Verfahren zur Wiederaufbereitung von mit Aluminium beschichteten flächigen SubstratenProcess for reprocessing flat substrates coated with aluminum
Die Erfindung betrifft ein Verfahren zur Wiederaufbereitung von mit Aluminium beschichteten flächigen Substraten, insbesondere Folien, Blätter, Streifen, in einThe invention relates to a process for the reprocessing of aluminum-coated flat substrates, in particular foils, sheets, strips, in one
Aluminiumgranulat und einen faserigen Substratfilz.Aluminum granules and a fibrous substrate felt.
Bei den besagten flächigen Substraten handelt es sich beibspielsweise um papier- oder um plastikkaschierte oder um bedruckte oder gefärbte Aluminiumfolienabfälle.The said flat substrates are, for example, paper or plastic-laminated or printed or colored aluminum foil waste.
Bekanntermassen werden derartige Aluminiumfolienabfälle bislang zur Rückgewinnung von Aluminium beispielsweise in Ballenpressen kompaktiert und die Ballen dann in Öfen verbrannt oder einem thermischen Verfahren unterzogen. Hierbei entstehen Abgase, die entsprechend den zurIt is known that aluminum foil waste of this type has hitherto been compacted for the recovery of aluminum, for example in balers, and the bales are then burned in ovens or subjected to a thermal process. This creates exhaust gases that correspond to the
Behandlung gelangenden Folienabfällen dioxinhaltig sein können, bzw. die in jedem Fall eine ümweltgefährdung darstellen. Aus diesem Grunde sind bei den besagten bekannten Verfahren für die Abgase Waschanlagen erforderlich, die sowohl in der Anschaffung als auch im Betrieb sehr aufwendig sind. Ausserdem kann ihre Betriebszuverlässigkeit Wünsche offen lassen. Ein weiterer Mangel dieser bekannten Verfahren besteht darin, dass das entstehende Aluminiumgranulat mit Verbrennungsprodukten, insbesondere mit aus dem verbrannten bzw. thermisch behandelten Substrat resultierendem Kohlenstoff behaftet ist, der in einer eigenen Einrichtung vom Alumuminiumgranulat entfernt werden muss. Auch das wirkt sich auf die Herstellungskosten des Aluminiumgranulates nachteilig aus. Ein weiterer Mangel solcher Verbrennungsvorgänge bzw. thermischer Verfahren besteht in deren Energieverbrauch. Aus diesem Grunde wurde auch bereits vorgeschlagen, zur Wiederaufbereitung von mit Aluminium beschichteten flächigen Substraten in Form insbesondere von Aluminiumfolienabfällen ein Flüssigkeitsverfahren beispielsweise mit Wasser anzuwenden, um auf nassem Wege eine Trennung des Aluminiums vom Substrat zu bewerkstelligen. Solche Flüssigkeitsverfahren sind jedoch technologisch sehr aufwendig. Ausserdem sind für solche Flüssigkeitsverfahren erhebliche Wassermengen erforderlich. Ein weiterer Mangel dieser Flüssigkeitsverfahren besteht darin, dass das daraus resultierende Aluminiumgranulat normalerweise noch mit unerwünschten Fremdstoffen durchsetzt ist.Foil waste received treatment may contain dioxin, or in any case pose an environmental hazard. For this reason there are washing systems in the known processes for the exhaust gases required, which are very complex both in terms of acquisition and operation. In addition, their operational reliability can leave nothing to be desired. Another deficiency of these known methods is that the resulting aluminum granules contain combustion products, in particular carbon resulting from the burned or thermally treated substrate, which must be removed from the aluminum granules in a separate device. This also has a disadvantageous effect on the production costs of the aluminum granulate. Another shortcoming of such combustion processes or thermal processes is their energy consumption. For this reason, it has also already been proposed to use a liquid process, for example with water, for the reprocessing of aluminum-coated flat substrates in the form of, in particular, aluminum foil wastes, in order to bring about a separation of the aluminum from the substrate by wet means. However, such liquid processes are technologically very complex. In addition, considerable amounts of water are required for such liquid processes. Another shortcoming of these liquid processes is that the resulting aluminum granulate is usually still permeated with undesirable foreign substances.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, das die oben erwähnten Mängel nicht aufweist, d.h. das umweltfreundlich und mit geringem Energieaufwand eine optimale Trennung desThe invention has for its object to provide a method of the type mentioned that does not have the above-mentioned shortcomings, i.e. the environmentally friendly and with low energy consumption an optimal separation of the
Aluminiums vom entsprechenden Substrat ermöglicht, wobei das entstehende Aluminiumgranulat dann in einer wiederverwendbaren Form zur Verfügung steht. Diese Aufgabe wird erfindungsgemäss durch die Merkmale des Anspruchs 1 gelöst.Allows aluminum from the corresponding substrate, the resulting aluminum granulate then being available in a reusable form. According to the invention, this object is achieved by the features of claim 1.
Erfindungsgemäss werden also die mit Aluminium beschichteten flächigen Substrate in einem erstenAccording to the invention, the flat substrates coated with aluminum are therefore in a first
Arbeitsschritt auf mechanischem Wege zu einem Vormaterial zerschnitzelt. Das zerschnitzelte Vormaterial wird dann mittels ineinandergreifender mechanischer Systeme zermahlen, wobei das Aluminium vom Subatrat getrennt und gleichzeitig granuliert wird. Beim erfindungsgemässen Verfahren ergibt sich folglich in vorteilhafter Weise direkt und unmittelbar, d.h. mit geringem Energieaufwand und ohne Umweltbelastung ein Aluminiumgranulat und ein faseriger Substrtfilz.Work step mechanically shredded into a raw material. The shredded primary material is then ground using interlocking mechanical systems, whereby the aluminum is separated from the subatrate and simultaneously granulated. The method according to the invention consequently advantageously results directly and immediately, i.e. An aluminum granulate and a fibrous substrate felt with low energy consumption and without environmental pollution.
Als vorteilhaft hat es sich hierbei erwiesen, wenn die mit Aluminium beschichteten Substrate zu einem Vormaterial mit Abmessungen zwischen 1 und 50 mm, vorzugsweise zwischen 5 mm und 20 mm, zerschnitzelt werden. Dabei ist es möglich, dass das zerschnitzelte Vormaterial aus einem Gemisch aus papierkaschierten Aluminiumfolienabfällen, plastikbeschichteten Aluminiumfolienabfällen sowie bedruckten oder gefärbten Aluminiumfolienabfällen besteht. Beispielsweise können grössenordnungsmässig 50 Gew.-% papierkaschierte Aluminiumfolienabfälle mit grössenordnungsmässig 35 Gew.-% plastikkaschierten Aluminiumfolienabfällen und grössenordnungsmässig 15 Gew.-% bedrucken oder gefärbten Aluminiumfolienabfällen gemischt sein. Selbstverständlich sind auch beliebige andere Mischungsverhältnisse möglich. Durch die ganz spezielle Zermahlung des zerschnitzelten Vormaterials mittels der ineinandergreifenden mechanischen Systeme, die mit hohen Drehzahlen rotieren, ergibt sich eine mechanische Trennung der Aluminiumbeschichtung vom Substrat und ein Aufrollen des Aluminiums zum entsprechenden Granulat.It has proven to be advantageous here if the substrates coated with aluminum are chopped into a starting material with dimensions between 1 and 50 mm, preferably between 5 mm and 20 mm. It is possible that the shredded primary material consists of a mixture of paper-laminated aluminum foil waste, plastic-coated aluminum foil waste and printed or colored aluminum foil waste. For example, 50% by weight of paper-clad aluminum foil wastes with 35% by weight of plastic-clad aluminum foil wastes and 15% by weight of printing or colored aluminum foil wastes can be mixed. Any other mixing ratios are of course also possible. The very special grinding of the shredded primary material by means of the interlocking mechanical systems, which rotate at high speeds, results in a mechanical separation the aluminum coating from the substrate and rolling up the aluminum to the corresponding granulate.
Das zerschnitzelte Vormaterial wird vorzugsweise mechanisch derartig gemahlen, dass sich ein Aluminiumgranulat mit einer Korngrösse zwischen 20 und lOOOμm, vorzugsweise von ca. 400μm, und ein langfaseriger Substratfilz ergibt. Der langfaserige Substratfilz kann dann in vorteilhafter Weise beispielsweise bei der Papierfabrikation eine Wiederverwendung finden. Das mit dem erfindungsgemässenThe shredded primary material is preferably mechanically ground in such a way that aluminum granules with a grain size of between 20 and 100 μm, preferably of approximately 400 μm, and a long-fiber substrate felt result. The long-fiber substrate felt can then advantageously be reused, for example in paper production. That with the inventive
Verfahren erzeugte Aluminiumgranulat kann mechanisch einer Fraktionierung in definierte Kornfraktionen unterzogen werden und beispielsweise als Aluminiumpigment in der Lackindustrie od. dgl. eine Wiederverwendung finden. Zu diesem Zweck können aus dem Aluminiumgranulat mittels einer Mahleinrichtung Pigmente hergestellt werden. Bei der besagten Mahleinrichtung kann es sich z.B. um eine an sich bekannte Kugelmühle o.dgl. handeln. Erfindungsgemäss kann hierbei das Aluminiumgranulat in einem nassen Medium zu Aluminiumpigmenten aufgemahlen werden. Als nasses Medium können Kohlenwasserstoffe angewandt werden. Es ist auch möglich, das Aluminiumgranulat trocken aufzumahlen. Das kann z.B. in einer Stickstoffatmosphäre geschehen.Processed aluminum granulate can be mechanically subjected to a fractionation into defined grain fractions and can be reused, for example, as aluminum pigment in the paint industry or the like. For this purpose, pigments can be produced from the aluminum granulate using a grinding device. The said grinding device can e.g. a known ball mill or the like. act. According to the invention, the aluminum granules can be ground to aluminum pigments in a wet medium. Hydrocarbons can be used as the wet medium. It is also possible to grind the aluminum granulate dry. This can e.g. happen in a nitrogen atmosphere.
Vorzugsweise wird das Aluminiumgranulat zuThe aluminum granulate is preferably added
Aluminiumpigmenten mit einer Grosse von ca. 2 bis 100 μm, vorzugsweise von 2 bis 20 μm aufgemahlen. Die Dicke der einzelnen Aluminiumpigmente liegt grössenordnungsmässig um 4 μm.Aluminum pigments with a size of about 2 to 100 microns, preferably from 2 to 20 microns ground. The thickness of the individual aluminum pigments is on the order of 4 μm.
Werden die erfindungsgemässen Aluminiumpigmente mit einem handelsüblichen Bindemittel bspw. auf Kunstharz- oder Nitrobasis gemischt, so ergibt sich ein Aluminiumlack, der in besonders vorteilhafter Weise eine metallisch blanke silberähnliche Oberfläche besitzt. Im Vergleich hierzu besitzen handelsübliche Aluminiumlacke nur eine vergleichsweise dunkle aluminiumähnliche Oberfläche, d.h. sie zeigen keinen Silbereffekt.If the aluminum pigments according to the invention are mixed with a commercially available binder, for example based on synthetic resin or nitro, an aluminum lacquer is obtained which, in a particularly advantageous manner, has a bright metallic finish has a silver-like surface. In comparison, commercially available aluminum paints only have a comparatively dark aluminum-like surface, ie they show no silver effect.
Das erfindungsgemässe Verfahren zeichnet sich also dadurch aus, dass umweltgefährdende bzw. -schädliche Abgase vermieden werden, dass Waschanlagen zur Beseitigen solcher Abgase nicht erforderlich sind, dass der Energiebedarf vergleichsweise gering ist, dass ein Flüssigkeitsbedarf, wie er bei den eingangs erwähnten Flüssigkeitsverfahren erforderlich ist, nicht gegeben ist, dass nicht nur das wiedergewonnene Aluminiumgranulat sondern ausserdem auch das Substratmaterial in Form des erfindungsgemäss entstehenden langfaserigen Substratfilzes einerThe process according to the invention is thus distinguished by the fact that exhaust gases which are hazardous or harmful to the environment are avoided, that washing plants are not required to remove such exhaust gases, that the energy requirement is comparatively low, that a liquid requirement, as is required in the liquid processes mentioned at the outset, it is not the case that not only the recovered aluminum granulate but also the substrate material in the form of the long-fiber substrate felt produced according to the invention
Wiederverwendung zugeführt werden kann, so dass auch diesbezüglich keine Deponiekosten entstehen, und dass die aus derartig hergestelltem Aluminiumgranulat erzeugten Aluminiumpigmente gemischt mit einem handelsüblichen Bindemittel einen Lack ergeben, der eine blanke metallische silberähnliche Oberfläche aufweist.Can be reused, so that no landfill costs arise in this regard, and that the aluminum pigments produced from aluminum granulate produced in this way, mixed with a commercially available binder, produce a lacquer which has a bare metallic, silver-like surface.
Nachfolgend wird das erfindungsgemässe Verfahren anhand des in der Zeichnung dargestellten Blockdiagrammes nocheinmal kurz erläutert. Die Zeichnungsfigur verdeutlicht durch den Block 10 das Ausgangsmaterial. Bei dem besagten Ausgangsmaterial handelt es sich um mit Aluminium beschichtete flächige Substrate wie papier- oder plastikkaschierte Aluminiumfolienabfälle oder um bedruckte oder gefärbte Aluminiumfolienabfälle. Das Ausgangsmaterial 10 wird mechanisch zerschnitzelt, was durch den Block 12 angedeutet ist. Das durch die mechanische Zerschnitzelung entstehende Vormaterial weist Abmessungen zwischen 1 und 50 mm, vorzugsweise zwischen 5 und 20mm auf. Das zerschnitzelte Vormaterial wird dann mittels ineinandergreifender mechanischer Systeme mechanisch zermahlen, was durch den Block 14 angedeutet ist. Beim mechanischen Zermahlen entsteht das entsprechende Aluminiumgranulat, was durch den Block 16 angedeutet ist, und gleichzeitig ein Substratfilz 18, was durch den Block 18 verdeutlicht ist. Das Aluminiumgranulat 16 weist eine Korngrösse zwischen 20 und 1000 μm, vorzugsweise von ca. 400 μm auf. Der Substratfilz 18 ist in vorteilhafter Weise relativ langfaserig, so dass er sich zur Wiederverwendung beispielsweise bei der Papierfabrikation eignet, was durch den Block 20 angedeutet ist. Selbstverständlich kann der Substratfilz auch einer anderen geeigneten Wiederverwendung zugeführt werden. Das Aluminiumgranulat 16 kann einer Fraktionierung zugeführt werden, was durch den Block 22 verdeutlicht ist. Bei der Fraktionierung 22 ergibt sich in an sich bekannter Weise eine Auftrennung in verschiedene Kornfraktionen des Aluminiumgranulats. Das Aluminiumgranulat kann dann zu Pigmenten aufgemahlen werden, die mit einem geeigneten Bindemittel gemischt in der Lackindustrie od. dgl. eine Wiederverwendung finden können. Das ist in der Zeichnung durch den Block 24 angedeutet. Erfindungsgemäss hergestellte Aluminiumlacke ergeben in vorteilhafter Weise eine blanke metallische silberähnliche Oberfläche. Ein solcher Silbereffekt ist mit den bekannten handelsüblichen Aluminiumpigmenten nicht erzielbar.The method according to the invention is briefly explained again below using the block diagram shown in the drawing. The drawing figure clarifies the starting material through block 10. The said starting material is flat substrates coated with aluminum, such as paper or plastic-laminated aluminum foil waste, or printed or colored aluminum foil waste. The starting material 10 is mechanically shredded, which is indicated by the block 12. The primary material resulting from the mechanical shredding has dimensions between 1 and 50 mm, preferably between 5 and 20 mm. The shredded primary material is then mechanically ground by means of interlocking mechanical systems, which is indicated by block 14. During mechanical grinding, the corresponding aluminum granulate is formed, which is indicated by block 16, and at the same time a substrate felt 18, which is illustrated by block 18. The aluminum granulate 16 has a grain size between 20 and 1000 μm, preferably of approximately 400 μm. The substrate felt 18 is advantageously relatively long-fiber, so that it is suitable for reuse, for example in paper manufacture, which is indicated by the block 20. Of course, the substrate felt can also be sent to another suitable reuse. The aluminum granulate 16 can be fed to a fractionation, which is illustrated by block 22. Fractionation 22 results in a separation into different grain fractions of the aluminum granulate in a manner known per se. The aluminum granulate can then be ground into pigments which, mixed with a suitable binder, can be reused in the paint industry or the like. This is indicated in the drawing by block 24. Aluminum lacquers produced according to the invention advantageously result in a bright metallic, silver-like surface. Such a silver effect cannot be achieved with the known commercially available aluminum pigments.
Erfindungsgemäss ergibt sich also in einem Arbeitsprozess ein von Fremdstoffen freies Aluminiumgranulat mit verschiedenen Feinheiten bzw. Korngrössen, und insbes. der Vorteil, dass die aus diesem Granulat hergestellten Pigmente mit geeigneten handelsüblichen Bindemitteln gemischt zu Lacken führen, die einen metallischen blanken silberähnlichen Effekt ergeben. Die Kapazität einer Anlage zur Durchführung des erfindungsgemässen Verfahrens kann je nach der Art des zur Anwendung gelangendenAccording to the invention, aluminum granules with different finenesses or grain sizes are obtained in one working process, and in particular the advantage is that the pigments produced from these granules mixed with suitable commercially available binders lead to lacquers which have a metallic bare surface silver-like effect. The capacity of a plant for carrying out the method according to the invention can vary depending on the type of application
Ausgangsmaterials zwischen 100 und 500 kg Aluminiumgranulat pro Stunde betragen. Zur Bedienung einer solchen Anlage ist eine einzige Arbeitskraft ausreichend. Starting material between 100 and 500 kg of aluminum granules per hour. A single worker is sufficient to operate such a system.

Claims

A n s p r ü c h e Expectations
1. Verfahren zur Wiederaufbereitung von mit Aluminium beschichteten flächigen Substraten, insbesondere Folien, Blätter, Streifen in ein Aluminiumgranulat und einen faserigen Substratfilz, wobei das1. Process for the reprocessing of aluminum-coated flat substrates, in particular foils, sheets, strips in an aluminum granulate and a fibrous substrate felt, the
Aluminium vom Substrat getrennt und granuliert wird, die mit Aluminium beschichteten flächigen Substrate mechanisch zu einem Vormaterial zerschnitzelt werden und das zerschnitzelte Vormaterial anschliessend in ineinander greifenden mechanischen Systemen zermahlen wird.Aluminum is separated from the substrate and granulated, the flat substrates coated with aluminum are mechanically shredded to form a primary material and the shredded primary material is then ground in interlocking mechanical systems.
2. Verfahren nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die aluminiumbeschichteten Substrate zu einem2. The method of claim 1, d a d u r c h g e k e n n z e i c h n e t that the aluminum-coated substrates into one
Vormaterial mit Abmessungen zwischen 1 und 50 mm, vorzugsweise zwischen 5 und 20 mm, zerschnitzelt werden.Input material with dimensions between 1 and 50 mm, preferably between 5 and 20 mm, can be shredded.
3. Verfahren nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, dass das zerschnitzelte Vormaterial mechanisch derartig gemahlen wird, dass sich ein Aluminiumgranulat mit einer Korngrösse zwischen 20 und 1000 μm, vorzugsweise von ca.3. The method according to claim 1 or 2, characterized in that the shredded primary material is mechanically ground such that a Aluminum granules with a grain size between 20 and 1000 μm, preferably of approx.
400 μm, und ein langfaseriger Substratfilz ergibt.400 μm, and a long-fiber substrate felt results.
4. Verfahren nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, dass mechanisch eine Fraktionierung des Aluminiumgranulates in definierte Kornfraktionen erfolgt.4. The method according to any one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that mechanically fractionation of the aluminum granules into defined grain fractions.
5. Verfahren nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass aus dem Aluminiumgranulat mittels einer Mahleinrichtung Pigmente hergestellt werden.5. The method according to any one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that pigments are produced from the aluminum granules by means of a grinding device.
6. Verfahren nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , dass das Aluminiumgranulat mit einem nassen Medium zu Aluminiumpigmenten aufgemahlen wird.6. The method according to claim 5, so that the aluminum granules are ground with a wet medium to form aluminum pigments.
7. Verfahren nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t, dass als nasses Medium Kohlenwasserstoffe verwendet werden.7. The method of claim 6, d a d u r c h g e k e n n z e i c h n e t that hydrocarbons are used as the wet medium.
8. Verfahren nach einem der Ansprüche 5 bis 7, d a d u r c h g e k e n n z e i c h n e t , dass das Aluminiumgranulat zu Aluminiumpigmenten mit einer Grosse von ca. 2 bis 100 μm, vorzugsweise von 2 bis 20 μm, aufgemahlen wird. 8. The method according to any one of claims 5 to 7, so that the aluminum granules are ground into aluminum pigments with a size of approximately 2 to 100 μm, preferably 2 to 20 μm.
PCT/DE1994/000946 1993-08-14 1994-08-13 Method of reprocessing flat substrates coated with aluminium WO1995005488A1 (en)

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DE4327355 1993-08-14
DE4329773A DE4329773C1 (en) 1993-08-14 1993-09-03 Method for reconditioning metal-coated two-dimensional substrates
DEP4329773.0 1993-09-03

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US5593773A (en) * 1992-07-23 1997-01-14 Silberline Limited Metal powder pigment

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FR2510428A1 (en) * 1981-07-31 1983-02-04 Scal Gp Condit Aluminium Delamination of paper and plastic from aluminium - employs acidified organic solvent followed by aq. pulping
DE3313872C1 (en) * 1983-04-16 1984-07-26 Metac Metallaufbereitung GmbH, 4432 Gronau Process and plant for the treatment of metal parts provided with a surface coating
AT378336B (en) * 1983-11-07 1985-07-25 Chemie Linz Ag METHOD FOR SEPARATING METAL AND PLASTIC FROM A PANEL-LIKE METAL / PLASTIC COMPOSITE MATERIAL
JPS61238929A (en) * 1985-04-16 1986-10-24 Bunka Nenryo Kk Recovering method for aluminum
JPS61238928A (en) * 1985-04-16 1986-10-24 Bunka Nenryo Kk Recovering method for aluminum
EP0441739A1 (en) * 1990-02-08 1991-08-14 Alusuisse-Lonza Services Ag Method of recycling coated metal waste material by shredding
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GB2035854A (en) * 1978-11-29 1980-06-25 Alcan Res & Dev Aluminium powder blasting slurry sensitizer
FR2510428A1 (en) * 1981-07-31 1983-02-04 Scal Gp Condit Aluminium Delamination of paper and plastic from aluminium - employs acidified organic solvent followed by aq. pulping
DE3313872C1 (en) * 1983-04-16 1984-07-26 Metac Metallaufbereitung GmbH, 4432 Gronau Process and plant for the treatment of metal parts provided with a surface coating
AT378336B (en) * 1983-11-07 1985-07-25 Chemie Linz Ag METHOD FOR SEPARATING METAL AND PLASTIC FROM A PANEL-LIKE METAL / PLASTIC COMPOSITE MATERIAL
JPS61238929A (en) * 1985-04-16 1986-10-24 Bunka Nenryo Kk Recovering method for aluminum
JPS61238928A (en) * 1985-04-16 1986-10-24 Bunka Nenryo Kk Recovering method for aluminum
EP0441739A1 (en) * 1990-02-08 1991-08-14 Alusuisse-Lonza Services Ag Method of recycling coated metal waste material by shredding
US5246116A (en) * 1992-09-22 1993-09-21 Reynolds Metals Company Method and apparatus for separation and recovery of the components from foil-containing laminates

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WO1998049238A1 (en) * 1997-04-28 1998-11-05 Basf Aktiengesellschaft Use of recycled cd material as an additive for glitter dyes

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