JP2001064735A - Method and system for recovering gold or the like from portable telephone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the recovery of gold or the like from a printed wiring board or the like at a low cost by crushing a waste portable telephone or the like, burning combustive materials such as synthetic products, subjecting the residues to magnetic separation and recovering, e.g. noble metals such as gold. SOLUTION: A waste material 1 such as a waste portable telephone is crushed by a crushing machine 2, and charged to a burning furnace 3 and is subjected to high temp. burning. Ash 5 collected in the lower part of the burning furnace 3 is transferred to a receiving tank 14 and is mixed with water, and this mixture is fed to a magnetic separating device 7 by a pump 6. At the outside of a rotary separating cylinder 9 of a magnetic separating device 7, a plurality of electromagnets 8a and 8d are arranged in series, in which magnetic force on the sides of feeding the mixture is made weak, noble metals or the like corresponding to the intensity of each magnetic force is respectively magnetized to the magnetic poles in the rotary separating cylinder 9. When each noble metal is magnetized, degaussing is executed per magnetic field, fresh water is made to reversely flow in the direction of the arrow 34, a valve 35 is closed, a valve 36 is opened, valves 37a to 37d are suitably opened and closed, noble metals or the like is discharged to vessels 10a to 10d per magnetic field and is respectively recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone for recovering gold and other precious metals and the like from a printed circuit board and other devices that use gold and other precious metals and the like, such as a waste portable telephone. The present invention relates to a method and system for collecting money and the like from a telephone or the like.

[0002]

2. Description of the Related Art Conventionally, waste portable telephones and the like are discarded without being reused as industrial waste. 2. Description of the Related Art In recent years, methods for processing and recovering electronic devices such as printed circuit boards, which frequently use gold or other precious metals, have been proposed.

For example, a method has been proposed in which a noble metal is dissolved and extracted from a recovered material containing a noble metal with an iodine compound-containing solution, and then the noble metal is separated, separated, and recovered (Japanese Patent No. 257159).
No. 1). Also, a method of reducing a noble metal by firing a scrap containing a noble metal in the presence of carbon-containing steam and reducing the resulting water gas reaction has been proposed (Japanese Patent Publication No. 7-65121).

[0004] Next, a metal dissolving step of dissolving the metal in the waste printed circuit board or the like by introducing it into an acid such as nitric acid, hydrochloric acid, sulfuric acid or the like, and a treatment for detoxifying steam or gas generated in the metal dissolving step. Detoxification treatment of a gas or the like, and adding an alkali to the metal-dissolving acid containing the dissolved metal to adjust the pH to 4 to
Pt, Pd, Rh, Os, Ru, A deposited at 5
A method for treating waste printed circuit boards, which includes a step of recovering precious metals such as v by filtering and recovering precious metals, and a step of removing non-dissolved substances for removing non-dissolved substances such as glass epoxy and polyimide. (JP-A-11-36020)
issue).

Further, a method is also known in which a gold-plated electronic component is immersed in an acid to dissolve the underlying metal in the acid and to peel and recover the gold (Japanese Patent Application Laid-Open No. 8-13051).

[0006]

Conventionally, waste portable telephones and the like have been buried and disposed of as industrial waste. However, the number of buried places has been reduced, and there is a need for countermeasures, but there is no fundamental solution.

The method of dissolving the precious metal or the like or the method of dissolving the precious metal carrier (metal) uses a lot of chemicals, so that the treatment requires a lot of time and equipment costs, and only the printed circuit boards and the like are collected. However, there is a problem that the cost of the processing is further increased.

[0008] The method of firing scrap is a method of obtaining a reduced noble metal by reducing the scrap by a water gas reaction generated by firing the scrap in the presence of a carbon-containing material and water vapor using a catalyst. Although precious metals can be recovered during the period, there is a problem that the treatment becomes complicated.

[0009]

SUMMARY OF THE INVENTION According to the present invention, waste mobile telephones and the like are roughly crushed and calcined to separate noble metals and the like from residues (ash), or the waste mobile telephones and the like are melted by heating and melting. Precious metals and the like are separated and taken out from the hot water by specific gravity selection, or the waste mobile phones and the like are roughly crushed, finely crushed, and magnetically separated to separate and collect the noble metals and the like for each type. It is.

[0010] Therefore, the conventional problems have been solved by separating and recovering precious metals and the like by incineration, dissolution, or pulverization of waste portable telephones or the like by using the conventional technology and a novel device.

In other words, the invention of the method is characterized in that a waste mobile phone or the like is roughly crushed, a combustion product such as a synthetic resin product is incinerated, and a residue is magnetically separated to recover gold and other precious metals. This is a method of recovering gold etc. from mobile phones, etc., characterized by crushing waste mobile phones, etc., melting this at high temperature, and separating and recovering each precious metal component etc. by specific gravity from this molten metal. This is a method of collecting money and the like from a mobile phone or the like. Another method of the present invention is characterized in that a waste mobile telephone is roughly crushed, finely crushed, then magnetically separated, and gold and other precious metals are separated and collected by type. This is a method of recovering gold or the like from a device or the like, and a waste portable telephone device or the like is an electric device having a built-in article using many kinds of metals such as a noble metal such as a printed circuit board.

[0012] Next, the invention of the system comprises means for coarsely crushing waste portable telephones, etc., pretreatment means for burning, melting or finely pulverizing the crushed material, and the material obtained by the pretreatment means. A system for recovering gold and the like from a mobile phone or the like, characterized by sequentially connecting separation means for specific gravity separation or magnetic separation and connecting means for purifying the separated material. Further, the specific gravity separation in the separation means is provided with outlets having different heights in the molten metal furnace, and the magnetic separation is such that magnetic fields having different magnetic forces are arranged in series in a cylinder, and a noble metal or the like corresponding to each magnetic force is respectively arranged. It is magnetized and demagnetized for each magnetic field, and the magnetized metal is separated and taken out.

In the present invention, a portable telephone or the like refers to an electronic device including a portable telephone, a personal computer, a word processor, or a printed circuit board that uses a lot of precious metals or the like.

The noble metal and the like in the present invention are gold, platinum, silver, copper, nickel, zinc, tin, lead, manganese or palladium, and the amount and type thereof differ depending on the electronic device.

The material other than the noble metal in the above is mainly a synthetic resin. For example, polyethylene, polyester, epoxy resin, phenol resin, polyimide, glass epoxy, and the like. When melted, undissolved matter (for example, thermosetting resin) floats as slag, and thus can be easily removed. Further, since the molten metal forms a layer depending on the specific gravity, it is possible to separate and extract each noble metal or the like by extracting the molten metal for each layer.

In the above invention, when the fuel is burned,
Combustion products are emitted as gas, and precious metals etc. are residues (ash)
Is in. Therefore, if the noble metal or the like is magnetically separated from the residue, it can be separated and recovered by type.

That is, since each noble metal or the like has ferromagnetism, weak magnetism, or weak magnetism, the strength of the magnetic force at the magnetic pole is reduced by one.
Multi-stage for each metal such as 000 gauss to 100,000 gauss. For example, when separating gold, platinum, nickel and tin, four magnetic fields of 5000 gauss, 10,000 gauss, 50,000 gauss and 100,000 gauss are arranged in series, and 50
Nickel to magnetic pole of 00 Gauss, platinum to magnetic pole of 10,000 Gauss, tin to magnetic pole of 50,000 Gauss, gold to magnetic pole of 100,000 Gauss,
Magnetically. In this case, the relationship between the strength of the magnetic force and the metal is based on the magnetism represented by the periodic rule.
According to the results of the experiment, even a substance (for example, N) which was considered to have no magnetism was magnetically attached to the magnetic pole in a strong magnetic field.

Accordingly, it has been found that even a weak magnetic material can be magnetically adhered if the magnetic force is increased. Although the above is the separation of the residue (ash), the same applies to the separation of precious metals and the like from the fine powder.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, in recovering precious metals and the like from waste portable telephones and the like, waste portable telephones and the like are burned to separate and collect residual (ash) precious metals and the like. Further, the molten metal is heated and melted, and the molten metal is separated by specific gravity. Furthermore, waste mobile phones and the like are made into fine powder, and precious metals and the like are separated and collected by magnetically attaching and separating the fine powder.

In any case, a waste portable telephone or the like is treated in a state where noble metals and the like are separated, and the noble metals and the like are separated and collected.

According to the present invention, there are provided a crushing means for coarsely crushing a waste portable telephone set, a pretreatment means for incineration, dissolution or fine pulverization, and a separation means for subjecting the material obtained by the pretreatment means to specific gravity separation and magnetic separation. A system for recovering gold and the like from a mobile phone or the like, which is connected sequentially and purifies the separated material to recover a precious metal and the like. The present invention recovers valuable materials from waste by recovering precious metals and the like that have been conventionally disposed, and has a great effect not only on effective use of resources but also on prevention of environmental pollution. Yes, a very useful technique.

The exhaust treatment device separates solid and gas by a cyclone method, gives an electric charge to the fine particles in the exhaust, makes the fine particles adsorb to the electrode, heats the electrode and incinerates the fine particles, For preventing the emission of dioxin and other harmful substances by means of collecting dust and preventing the emission to the outside world (Japanese Patent Application No. 11-152007).
Number).

[0023]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. Crusher 2 such as roller for waste material 1 such as waste mobile phone
Crushed (for example, about 10 mm to 100 mm),
The crushed material is put into the incinerator 3 and 800 ° C. to 900 ° C.
High temperature incineration.

An exhaust treatment device 4 is attached to the incinerator 3 to separate it into solid and gas by using a blowing cyclone as indicated by an arrow 42, and the solid is adsorbed on the electrode 38 and incinerated at a high temperature to obtain a gas. Is made harmless and is discharged from the discharge pipe 41 to the outside as indicated by arrows 39 and 40. On the other hand, the solid matter accumulated below is indicated by an arrow 44 by a screw conveyor 43.
Discharge like. The ash 5 accumulates at the lower part of the rostral 11 of the incinerator 3, and the ash 5 is moved by the screw 12 as shown by the arrow 13, enters the receiving tank 14 and mixes with water (water 8
0 to 90%) to obtain a mixture.
To one side of the magnetic separator 7. In the magnetic separation device 7, a plurality of electromagnets 8a, 8b, 8c and 8d whose feed side of the mixture is weakened are arranged in series outside the rotary separation cylinder 9. In the figure, 45a and 45b are air supply pumps, and 46 is a water supply pipe.

That is, a 5000 gauss electromagnet 8a, a 10,000 gauss electromagnet 8b, 500
An electromagnet 8c of 00 gauss and an electromagnet 8d of 100,000 gauss are mounted, and a magnetic field corresponding to the capacity of each electromagnet is generated in the rotation separating cylinder 9 and the magnetic poles in the rotation separating cylinder 9 are subjected to the strength of each magnetic force. Corresponding noble metals are magnetized respectively.

As described above, when a noble metal or the like is magnetically attached to each magnetic pole, demagnetization is performed for each magnetic field, and the fresh water flows backward as indicated by an arrow 34, the valve 35 is closed, and the valve 36 is opened.
By opening and closing the valves 37a, 37b, 37c, and 37d appropriately, the precious metal or the like is filled with the containers 10a, 1
It is taken out to 0b, 10c, and 10d, and each noble metal is separated and collected. Then, each noble metal or the like can be purified to obtain a high-purity noble metal or the like. Metals having substantially the same magnetism such as the noble metal are magnetically attached to the same magnetic pole (for example, gold, silver, etc.),
It separates further after fractionation.

The strength of the magnetic force in the above is appropriately selected depending on the kind of the noble metal to be recovered so as to be surely magnetized. Also, the rotary separation cylinder 9 is rotated (for example, 10 to 10 minutes per minute).
By performing 20 rotations), the magnetic adhesion can be equalized, and the demagnetization can be performed quickly and easily.

[0028]

Embodiment 2 Another embodiment of the present invention will be described with reference to FIGS. A waste material 1 such as a waste mobile phone is crushed by a crusher 2 such as a roller, and the crushed material 1a is melted in a melting furnace 1.
5 and heated to 900 ° C. to 1600 ° C. (for example, by plasma), and when the noble metals as well as the synthetic resin are dissolved, each hot water accumulates in a layer due to the specific gravity. For example, a metal layer having a specific gravity is formed from below such as platinum, gold, silver, copper, nickel, lead, tin, and aluminum. Then, after moving from the melting furnace 15 through the passage 15a to the molten metal tank 16, the inlets 17a, 17b, 17c, 1
7d, 17e, and the other side of the siphons 18a, 18b, 18c, 18d, 18e connected to the outlets on each side wall is connected to the outlets 19a, 19b, 19 of the molten metal tank 16.
c, 19d, and 19e, the lower ends of the pressure reducing pipes 20a, 20b, 20c, 20d, and 20e are connected to the tops of the siphons 18a, 18b, 18c, 18d, and 18e, and an embolus 21 is provided near the upper part of the siphon. .

In the above embodiment, the crushed material 1a
When supplied continuously or intermittently by mechanical (for example, a screw conveyor) or by its own weight, it is rapidly melted by the molten metal 25 in the melting furnace 15, so it is moved to the molten metal tank 16 as indicated by arrow 22, and each noble metal etc. Form upper and lower layers corresponding to the specific gravity. Then, when the thickness of each layer becomes a certain level or more (this point can be predicted by the amount of waste material dissolved), the pressure reducing pipe 20c of the corresponding siphon 18c (for example, copper) is used.
Is reduced, the copper 13 in the melt tank 16 flows through the siphon 18c from the lower layer as indicated by arrows 23 and 23a and accumulates in the receiver 24. If another metal (for example, aluminum) is mixed into the copper flowing out in this way, the pressure reducing pipe 20c is opened to normal pressure, or an inert gas is injected to increase the pressure to the siphon 18c. Movement of copper within is stopped. Similarly, if the decompression pipe is operated for each noble metal, each noble metal can be separately collected. The embolus 21 is opened and closed by an operating rod 21a.

In the above, since waste materials are dissolved, there is almost no harmful exhaust. However, for example, when harmful exhaust due to decomposition and vaporization of liquid crystal is expected, an exhaust device is attached to the melting furnace, and an exhaust treatment device is added thereto. Is activated.

[0031]

Embodiment 3 Another embodiment of the present invention will be described with reference to FIGS. After the waste material 1 such as a waste mobile phone is crushed by a crusher 2 and then finely crushed by a crusher 5 and supplied to a mixing tank 26, the fine powder and water are mixed by a stirrer 27. Mix uniformly (in this case, the water content is 80% to 9%).
0%).

The mixed solution obtained above is transferred under pressure by a pump 28 as shown by an arrow 29 and is sent to one side of a magnetic separator 30. In the magnetic separator 30, electromagnets 32 a, 32 b, 32 c, and 32 d having different magnetic forces are arranged outside the separation cylinder 31 in order from the inlet side of the magnetic separator 30 in the order of weak magnetic force. Then, when a current is applied to each of the electromagnets and the liquid mixture flows as indicated by arrow 33, the magnetic field generated by each of the electromagnets causes the noble metal or the like mixed in the liquid mixture to correspond to the strength of the magnetic material. Magnetically attach to magnetic poles in a magnetic field.

Therefore, demagnetization is performed for each electromagnet, and only the noble metal magnetically attached to the magnetic pole corresponding to the electromagnet is extracted to the outside world. However, the noble metal attached to the magnetic pole for each magnetic field has a different magnetic force. Inevitably, precious metals are separated and taken out. In this case, the same or similar magnetic metal is mixed and taken out. In this case, the purity can be improved by fractionation and purification.

[0034]

According to the present invention, there is an effect that precious metals and the like mainly used for a printed circuit board of a cellular phone or the like can be inexpensively processed and collected. According to the present invention, waste materials are coarsely crushed, incineration, melting or pulverization, etc., are conventionally improved, and development techniques relating to properties peculiar to waste materials are added. Since technology is employed for magnetically separating and recovering metals from fine powder, there is a characteristic that the technical reliability is high and the risk of failure is extremely small.

Further, according to the present invention, an electronic device including a printed circuit board, which has conventionally been considered difficult to recover, is separated and collected into precious metals or the like without performing pre-separation treatment. There are various effects such as the possibility of recycling wastes without fear of waste.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a conceptual diagram of each unit.

FIG. 3 is an explanatory view in which a part of the magnetic separator is omitted.

FIG. 4 is a block diagram of another embodiment.

FIG. 5 is a sectional view of the melting furnace with a part omitted.

FIG. 6 is an explanatory view in which a part of a take-out portion of a noble metal or the like is omitted.

FIG. 7 is a block diagram of an embodiment for performing a fine pulverization process.

FIG. 8 is a conceptual diagram of each device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Waste material 2 Crusher 3 Incinerator 4 Exhaust treatment device 5 Ash 6 Pump 7 Magnetic separation device 8a, 8b, 8c, 8d Electromagnet 9 Rotating separation cylinder 10a, 10b, 10c, 10d Container 15 Melting furnace 15a Passage 16 Molten tank 17a, 17b, 17c, 17d, 17e Inlet 18a, 18b, 18c, 18d, 18e Siphon 19a, 19b, 19c, 19d, 19e Outlet 20a, 20b, 20c, 20d, 20e Electromagnet 21 Plug 21a Operating rod 24 Receiver 25 Crushing Machine 26 Mixing tank 27 Stirrer 28 Pump 30 Magnetic separator 31 Separation cylinder 31a, 31b, 31c, 31d Electromagnet 35, 36, 37a, 37b, 37c, 37d Valve 38 Electrode 41 Discharge pipe 43 Screw conveyor 45a, 45b Air supply pump 46 Water supply pipe

Claims (7)

[Claims] 1. A mobile phone or the like characterized by crushing a waste mobile phone or the like, burning incineration products such as synthetic resin products, and magnetically separating a residue to recover gold and other precious metals. To collect gold etc. from 2. A waste mobile phone or the like is coarsely crushed, melted at a high temperature, and components such as noble metals are separated and recovered from the molten metal by specific gravity. Gold and the like are recovered from the mobile phone and the like. how to. 3. A mobile phone or the like characterized in that a waste mobile phone or the like is coarsely crushed and then finely crushed, magnetically separated, and gold and other precious metals are separated and collected by type. How to collect etc. 4. The mobile phone according to claim 1, wherein the waste mobile phone is an electric device including an article using a variety of metals such as a noble metal such as a printed circuit board. A method of collecting gold, etc. from vessels. 5. A means for coarsely crushing a waste mobile phone, a pretreatment means for burning, dissolving or pulverizing the crushed material, and a specific gravity separation or a magnetic separation of the material obtained by said pretreatment means. And a means for recovering gold and the like from a mobile phone or the like, wherein the means for separating is connected to a means for purifying the separated material. 6. The system for recovering gold or the like from a mobile phone or the like according to claim 5, wherein the specific gravity separation in the separating means is provided with outlets having different heights in the molten metal furnace. 7. The magnetic separation comprises arranging magnetic fields having different magnetic forces in a cylinder in series, magnetically attaching a noble metal or the like corresponding to each magnetic force, demagnetizing each magnetic field, and separating and taking out the magnetically adhered metal. The method for collecting gold or the like from a mobile phone or the like according to claim 5, characterized in that: