JP4903753B2 - Method for recovering valuable metals from waste - Google Patents
Method for recovering valuable metals from waste Download PDFInfo
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- JP4903753B2 JP4903753B2 JP2008144732A JP2008144732A JP4903753B2 JP 4903753 B2 JP4903753 B2 JP 4903753B2 JP 2008144732 A JP2008144732 A JP 2008144732A JP 2008144732 A JP2008144732 A JP 2008144732A JP 4903753 B2 JP4903753 B2 JP 4903753B2
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- 229910052751 metal Inorganic materials 0.000 title claims description 40
- 239000002184 metal Substances 0.000 title claims description 40
- 238000000034 method Methods 0.000 title claims description 16
- 150000002739 metals Chemical class 0.000 title claims description 15
- 239000002699 waste material Substances 0.000 title claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002440 industrial waste Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 230000008685 targeting Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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
- 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
- C22B7/001—Dry processes
-
- 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
- C22B11/00—Obtaining noble metals
- C22B11/02—Obtaining noble metals by dry processes
- C22B11/021—Recovery of noble metals from waste materials
- C22B11/025—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper, or baths
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0056—Scrap treating
-
- 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
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0366—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement reinforced, e.g. by fibres, fabrics
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/11—Treatments characterised by their effect, e.g. heating, cooling, roughening
- H05K2203/1105—Heating or thermal processing not related to soldering, firing, curing or laminating, e.g. for shaping the substrate or during finish plating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/17—Post-manufacturing processes
- H05K2203/178—Demolishing, e.g. recycling, reverse engineering, destroying for security purposes; Using biodegradable materials
-
- 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
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Description
本発明は、ＩＣ基盤、プリント配線板などの廃棄物から有価金属を回収する方法に関するものである。
The present invention relates to a method for recovering valuable metals from wastes such as IC substrates and printed wiring boards.
パソコンや携帯電話で使用しているプリント配線板には相当量の金属が使用されている。
すなわちプリント配線板は、ガラスエポキシ基板などの絶縁板に、半導体素子を中心に、コンデンサー、抵抗器、配線などが組み合わせてあり、一般に有機成分が３２％、ガラス成分が３８％、金属成分が３０％程度で構成すると言われている。
そして有機成分の大半はエポキシ樹脂であり、ガラス成分の約６６％がＳｉＯ２である。
特に金属材料としては銅が多く、錫、鉄、鉛、ニッケル、金などの有価金属がプリント配線板の０．１％を占めているといわれている。
このように貴重は有価金属を含んでいるから、それらの金属を回収する各種の方法が開発され実用化されている。
That is, a printed wiring board is a combination of an insulating plate such as a glass epoxy board, a capacitor, a resistor, a wiring, etc., centering on a semiconductor element. It is said that it is composed of about%.
Most of the organic component is an epoxy resin, and about 66% of the glass component is SiO2.
In particular, there are many copper as metal materials, and it is said that valuable metals such as tin, iron, lead, nickel and gold occupy 0.1% of the printed wiring board.
Thus, since valuables contain valuable metals, various methods for recovering those metals have been developed and put into practical use.
前記したような従来の回収方法は、プリント配線板などを酸に溶解させたり、加熱したり、その後酸化させたり粉砕したりして回収する方法であり、次のような問題がある。
＜１＞ 加熱工程において材料中のガラス繊維が溶解し、金属を内部に包み込んだ状態で溶融固化状になってしまう。
＜２＞ 高温で焼却するため、装置、環境への負荷が大きい。
＜３＞ 高温での溶融、あるいは電気分解のために多大な燃料や電力を必要とする。
＜４＞ ガラス繊維を粉砕すればより効率的に酸に溶解させることができるが、しかし繊維質の材料には粘りがあるから、これを粉砕することが困難である。
The conventional recovery method as described above is a method in which a printed wiring board or the like is recovered by dissolving it in an acid, heating it, and then oxidizing or grinding it, and has the following problems.
<1> In the heating process, the glass fibers in the material are melted and become a melt-solidified state in which the metal is wrapped inside.
<2> Because it is incinerated at high temperature, the load on the equipment and the environment is large.
<3> A large amount of fuel and electric power are required for melting at high temperature or for electrolysis.
<4> If glass fiber is pulverized, it can be more efficiently dissolved in acid, but it is difficult to pulverize the fiber material because it is sticky.
上記のような課題を解決するために本発明の廃棄物から有価金属を回収する方法は、ガラス繊維、エポキシ樹脂、と銅、鉄、金、アルミニュウムなどの有価金属を一体化した産業廃棄物を対象とし、これらの産業廃棄物に対して、５００℃で２０分以上か、７５０℃で３０分以上か、または１０００℃で１０分以下に設定した温度を与えて、ガラス繊維を溶解させず、ガラス繊維を劣化させ、その後の工程において、溶解しておらず劣化しているガラス繊維を、比重による分類によって除去し、粉砕されておらず原形をとどめた有価金属を、廃棄物から取り出す廃棄物から有価金属を回収する方法を特徴とするものである。 In order to solve the above problems, the method of recovering valuable metals from the waste of the present invention is an industrial waste that integrates glass fibers, epoxy resins, and valuable metals such as copper, iron, gold, and aluminum. intended for these industrial wastes, or more than 20 minutes at 500 ° C., or 750 ° C. for 30 minutes or more, or giving temperature set to hereinafter 10 minutes at 1000 ° C., it does not dissolve the glass fiber Degradation of glass fiber, and in subsequent processes, glass fiber that has not melted and has been degraded is removed by classification based on specific gravity, and valuable metal that has not been crushed and remains in its original form is taken out from waste. It is characterized by a method of recovering valuable metals from a product.
本発明の廃棄物から金属を回収する方法は以上説明したようになるから次のような効果を得ることができる。
＜１＞溶融固化状のガラス繊維を粉砕するような工程を必要とせず、簡単な工程を経て有価物を取り出すことができる。
＜２＞高温による加熱、溶解を行わないので、環境を汚染する程度が低く、規制の厳格な国でも採用することができる。
＜３＞多量の燃料や電力を消費しないので経済的である。
Since the method for recovering metal from the waste according to the present invention is as described above, the following effects can be obtained.
<1> A valuable material can be taken out through a simple process without requiring a process of pulverizing the melt-solidified glass fiber.
<2> Since heating and melting at high temperatures are not performed, the degree of polluting the environment is low, and it can be adopted even in countries with strict regulations.
<3> Economical because a large amount of fuel and electric power are not consumed.
以下図面を参照にしながら本発明の好適な実施の形態を詳細に説明する。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
＜１＞対象物。
本発明の回収方法の対象とする産業廃棄物は、プリント配線板のような産業廃棄物である。
これらの産業廃棄物の特徴としては、ガラス繊維、エポキシ樹脂と、有価金属、たとえば銅、鉄、金、などを一体化した材料である点である。
<1> Object.
The industrial waste targeted by the recovery method of the present invention is an industrial waste such as a printed wiring board.
A characteristic of these industrial wastes is that they are materials in which glass fibers, epoxy resins, and valuable metals such as copper, iron, and gold are integrated.
＜２＞加熱工程。
これらの産業廃棄物に対して、所定の温度を一定時間だけ与えて加熱する。
この温度と時間は、ガラス繊維が溶解する以前であって、ガラス繊維が劣化する程度の温度である。
その温度と時間の関係を、多数の実験から求めた。
その結果、具体的には加熱する温度を５００℃で２０分以上、１０００℃で１０分以下の範囲で加熱するとよい結果が得られることが分かった。
さらに好ましくは約７５０℃で３０分以上、１０００℃で１０分以下に設定するとよりよい結果が得られることが分かった。
ここで「よい結果」とは、容易にガラス繊維と有価金属とを分離して、有価金属だけを簡単に取り出して回収できることを意味している。
<2> A heating step.
These industrial wastes are heated by giving a predetermined temperature for a certain period of time.
This temperature and time are temperatures at which the glass fiber is deteriorated before the glass fiber is melted.
The relationship between temperature and time was obtained from a number of experiments.
As a result, it was found that a good result can be obtained by heating at a temperature of 500 ° C. for 20 minutes or more and 1000 ° C. for 10 minutes or less.
More preferably, it was found that better results can be obtained when setting at about 750 ° C. for 30 minutes or more and 1000 ° C. for 10 minutes or less.
Here, “good result” means that the glass fiber and the valuable metal can be easily separated and only the valuable metal can be easily taken out and collected.
＜３＞ 温度と時間の選択の根拠。
＜３−１＞上限の選択。
上記のような温度と時間の上限を選択した理由は、この温度・時間以上の高温・時間で加熱するとガラス繊維が溶解して冷却時には強固に固まってしまうからである。
すると溶解したガラス繊維が金属を包み込んで固化状態となってしまい、その状態から直ちに金属を取り出すことはできない。
そのために従来は金属もガラス繊維も高温で溶融して比重の違いで金属を取り出していた。
しかし本発明の方法は１０００℃・１０分以下で加熱するから、ガラス繊維が溶解するには至らず、ガラス繊維が溶解して金属を包み込んでしまうことがない。
<3> Basis for selecting temperature and time.
<3-1> Selection of the upper limit.
The reason for selecting the upper limit of the temperature and time as described above is that when heated at a high temperature / time higher than this temperature / time, the glass fiber dissolves and solidifies firmly during cooling.
Then, the melted glass fiber wraps the metal and becomes a solidified state, and the metal cannot be immediately taken out from the state.
For this reason, conventionally, metals and glass fibers have been melted at high temperatures, and metals have been taken out due to differences in specific gravity.
However, since the method of the present invention heats at 1000 ° C. for 10 minutes or less, the glass fiber does not melt, and the glass fiber does not melt and envelop the metal.
＜３−２＞下限の選択
一方低温側の下限として、５００℃・２０分以下の加熱であると、ガラス繊維シートは、表面の色が褐色に変色する程度で、原状を維持したままであり、金属と分離することがない。
その状態のガラス繊維のシートは、加圧しても粉砕することがなく、金属との分離を行うことができない。
<3-2> Selection of lower limit On the other hand, as the lower limit on the low temperature side, the glass fiber sheet maintains its original shape to the extent that the color of the surface turns brown when heated at 500 ° C. for 20 minutes or less. , Do not separate from metal.
The glass fiber sheet in this state is not pulverized even when pressed and cannot be separated from the metal.
＜３−３＞適温・時間の選択。
ところが、５００℃・２０分以上で、７５０℃・３０分以下の範囲の加熱を行うと、ガラス繊維のシートと金属が一応は分離する。
したがって例えば、液体を使用して比重による分類などを行えば、金属片だけを沈降させて、ガラス繊維のシートとの分離を行って金属片だけを、取り出すことができる。
低温側の下限として、さらに好ましくは約７５０℃・３０分以上の加熱を行う。
この温度・時間に達すると、ガラス繊維のシートは、外見上ではシートとして板状の原形を保っているが、例えば指で摘み上げる程度の、わずかな外力を加えるだけで粉砕してしまう。
しかもこの温度範囲では金属は溶解しない。
したがって、わずかな振動を与えたり、ローラーでの加圧によってガラス繊維は粉砕し、金属片はそのまま金属として回収できる、という理想的な成果を得ることができる。
<3-3> Selection of appropriate temperature and time.
However, when heating is performed in the range of 500 ° C. · 20 minutes or more and 750 ° C. · 30 minutes or less, the glass fiber sheet and the metal are temporarily separated.
Therefore, for example, if classification is performed based on specific gravity using a liquid, only the metal piece can be settled and separated from the glass fiber sheet, and only the metal piece can be taken out.
As a lower limit on the low temperature side, heating at about 750 ° C. for 30 minutes or more is more preferable.
When this temperature and time are reached, the glass fiber sheet maintains a plate-like original shape as a sheet in appearance, but is crushed by applying a slight external force such as picking up with a finger.
Moreover, the metal does not dissolve in this temperature range.
Therefore, it is possible to obtain an ideal result that the glass fiber is crushed by applying a slight vibration or pressing with a roller, and the metal piece can be recovered as a metal as it is.
＜４＞実験の結果。
実際にプリント配線板を、３００℃・１０分から、１００℃、１０分刻みで各種の温度で加熱した。
各温度・時間ごとの結果の写真を図３から図４６に示し、その結果を一覧にして下の表１に示す。
<4> Results of the experiment.
Actually, the printed wiring board was heated at various temperatures from 300 ° C. and 10 minutes to 100 ° C. every 10 minutes.
Photographs of results for each temperature and time are shown in FIGS. 3 to 46, and the results are listed in Table 1 below.
なお、上記の時間以上の結果は出していないが、それ以上の時間をかけて加熱しても試料に変化はないためである。
In addition, although the result more than said time has not been taken out, it is because a sample will not change even if it heats over more time.
＜５＞無酸素状態での加熱。
電気炉などを使用して加熱すると、無酸素状態での加熱を行うことができる。
すると銅などの有価金属の表面を酸化させないから、酸化物の膜を形成させずに有価金属をそのまま取り出すことができる。
電気炉では、発熱体などの損傷が考慮される場合には、カーボンを混同して熱源として燃焼させて低酸素状態を作ることもできる。
<5> Heating in an oxygen-free state.
When heating is performed using an electric furnace or the like, heating in an oxygen-free state can be performed.
Then, since the surface of the valuable metal such as copper is not oxidized, the valuable metal can be taken out without forming an oxide film.
In an electric furnace, when damage to a heating element is considered, carbon can be mixed and burned as a heat source to create a low oxygen state.
＜６＞ガラス繊維の除去工程。
上記したような温度・時間の範囲で加熱した場合、特に５００℃・２０分以上で、７５０℃・３０分以下の範囲の加熱を行うと、ガラス繊維のシートは原型をほぼ保っているが、しかし有価金属とは分離している。
したがってそれ以降の分離工程において、比重による分類など、最適の方法を採用すれば、簡単にガラス繊維のシートと有価金属を分離して有価金属だけを回収することができる。
さらに。７５０℃・３０分以上の範囲の加熱を行うと、ガラス繊維は劣化して、指で摘み上げる程度のわずかな外力、振動の付加や加圧によって粉末状態に粉砕してしまう。
一方、加熱温度・時間は、１０００℃・１０分以下であるから、ガラス繊維が溶解するには至らず、ガラス繊維が溶解して金属を包み込んでしまうことがなく、金属片は原型をとどめたままである。
したがって、篩による分級、比重による分級、など公知の簡単な方法によってガラス繊維と有価金属とを分けて、ガラス繊維を除去し、有価金属だけを取り出すことができる。
<6> Glass fiber removal step.
When heated in the range of temperature and time as described above, especially when heating in the range of 500 ° C. · 20 minutes or more and 750 ° C. · 30 minutes or less, the glass fiber sheet keeps its original shape, However, it is separated from valuable metals.
Therefore, in the subsequent separation process, if an optimum method such as classification by specific gravity is employed, the glass fiber sheet and the valuable metal can be easily separated and only the valuable metal can be recovered.
further. When heating is performed at 750 ° C. for 30 minutes or more, the glass fiber deteriorates and is pulverized into a powder state by applying a slight external force, vibration, or pressurization that is picked up by a finger.
On the other hand, since the heating temperature and time are 1000 ° C. and 10 minutes or less, the glass fiber does not melt, the glass fiber does not melt and envelop the metal, and the metal piece remains the original shape. There is.
Therefore, it is possible to separate the glass fiber and the valuable metal by a known simple method such as classification with a sieve or classification with specific gravity, remove the glass fiber, and take out only the valuable metal.
Claims (1)
これらの産業廃棄物に対して、
５００℃で２０分以上か、７５０℃で３０分以上か、または１０００℃で１０分以下に設定した温度を与えて、ガラス繊維を溶解させず、ガラス繊維を劣化させ、
その後の工程において、
溶解しておらず劣化しているガラス繊維を、比重による分類によって除去し、
粉砕されておらず原形をとどめた有価金属を、廃棄物から取り出す、
廃棄物から有価金属を回収する方法。 Targeting industrial waste that integrates glass fiber, epoxy resin, and valuable metals such as copper, iron, gold, and aluminum,
For these industrial wastes,
Or 500 ° C. for 20 minutes or more, or 750 ° C. for 30 minutes or more, or giving temperature set under 10 minutes or more at 1000 ° C., does not dissolve the glass fiber, degrade the glass fibers,
In subsequent steps,
Glass fiber that has not melted and has deteriorated is removed by classification based on specific gravity,
Remove valuable metals that have not been crushed and retain their original shape from waste,
A method of recovering valuable metals from waste.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008144732A JP4903753B2 (en) | 2008-06-02 | 2008-06-02 | Method for recovering valuable metals from waste |
| US12/186,333 US20090293676A1 (en) | 2008-06-02 | 2008-08-05 | Method of recovering valuable metals from waste |
| US13/902,342 US20130333522A1 (en) | 2008-06-02 | 2013-05-24 | Method of Recovering Valuable Metals from Waste |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2008144732A JP4903753B2 (en) | 2008-06-02 | 2008-06-02 | Method for recovering valuable metals from waste |
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| JP4903753B2 true JP4903753B2 (en) | 2012-03-28 |
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| JP2008144732A Expired - Fee Related JP4903753B2 (en) | 2008-06-02 | 2008-06-02 | Method for recovering valuable metals from waste |
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| CN104710708B (en) * | 2015-02-09 | 2017-02-22 | 福建工程学院 | Method for preparing polyvinyl chloride plastic flame-retardant smoke-eliminating agent from waste circuit board metal concentrate |
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| JPH0288725A (en) * | 1988-09-27 | 1990-03-28 | Nippon Mining Co Ltd | Method for separating and recovering copper from waste printed board |
| JPH06256863A (en) * | 1993-03-05 | 1994-09-13 | Asaka Riken Kogyo Kk | Method for recovering metal from circuit board and device therefor |
| JPH0775771A (en) * | 1993-09-09 | 1995-03-20 | Hitachi Chem Co Ltd | Reusing method of waste copper-plated laminate substrate as resource |
| JPH0871521A (en) * | 1994-09-05 | 1996-03-19 | Hitachi Chem Co Ltd | Treatment of waste printed circuit board |
| EP1008395A3 (en) * | 1998-12-11 | 2003-05-02 | Matsushita Electric Industrial Co., Ltd. | Method for separating metallic material from waste printed circuit boards, and dry distilation apparatus used for waste treatment |
| JP2000210650A (en) * | 1999-01-26 | 2000-08-02 | Ebara Corp | Treatment of abandoned electronic equipment |
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| JP2009293055A (en) | 2009-12-17 |
| US20090293676A1 (en) | 2009-12-03 |
| US20130333522A1 (en) | 2013-12-19 |
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