WO2006019060A1

WO2006019060A1 - Apparatus for recovering metal

Info

Publication number: WO2006019060A1
Application number: PCT/JP2005/014849
Authority: WO
Inventors: Hisashi Iwama; Hiroaki Tanaka; Harunobu Kimura; Hitoshi Tanaka; Yutaka Hirota
Original assignee: The Furukawa Electric Co., Ltd.
Priority date: 2004-08-17
Filing date: 2005-08-12
Publication date: 2006-02-23
Also published as: EP1798312A4; JP2006083466A; EP1798312A1; US20080142374A1

Abstract

An apparatus for recovering a metal, which comprises a metal-recovering board (2) having an electrodeposition surface (2a, 2t) for the attachment of a metal component (R) precipitated from a solution and an insulating material (2b) formed around a pattern of the electrodeposition surface (2a, 2t). The metal-recovering board (2) is immersed in a metal-containing solution in an electrolytic treatment vessel (1), and thereby the metal in the solution is selectively precipitated on the electrodeposition surface (2a, 2t) and is converted to a bulk. The resultant metal bulk is scraped together for recovery with a blade (6) in a form as it is. The above apparatus for recovering a metal can be suitably used for recovering a metal in a solution in a state allowing easy reuse with good efficiency.

Description

Specification

Metal recovery device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a metal recovery device, and more particularly to a metal recovery device that recovers a metal contained in an acidic liquid or the like.

Background art

[0002] Generally, when a copper body or a copper alloy body is processed, an oxide is generated on the surface of the copper body or the copper alloy body during the process. This oxide is removed by treatment using a sulfuric acid aqueous solution, and copper ions are contained in the sulfuric acid aqueous solution after this treatment.

[0003] The acidic aqueous sulfuric acid solution needs to be periodically replaced because the copper ion concentration increases and the ability to remove acid oxides decreases as the number of treatments increases. It will be a thing.

[0004] For this reason, methods and apparatuses for reusing an aqueous sulfuric acid solution have been developed. Methods for recovering copper from an aqueous sulfuric acid solution include crystallization methods, copper plate electrodeposition methods, and barrel electrodeposition methods.

[0005] The crystallization method is a method in which an aqueous sulfuric acid solution containing copper ions is cooled to precipitate copper sulfate. However, a large amount of electric power is required for solution cooling, which increases the cost.

[0006] The copper plate electrodeposition method is a method in which a copper plate serving as a seed plate is immersed in a sulfuric acid aqueous solution containing copper ions, and copper is deposited on the surface of the copper plate. However, the production of the seed plate is costly, and the seed plate to which copper adheres due to copper deposition becomes heavy and it is not easy to take out the solution.

[0007] The barrel electrodeposition method is a method in which a copper chip is placed as an electrode in a basket immersed in an aqueous sulfuric acid solution, and copper is deposited on the surface of the copper chip. However, a mechanism for removing the copper chip from the cage is necessary, which increases the cost of the apparatus.

[0008] In addition, methods for recovering copper are described in the following documents 1 to 4. In Reference 1, a rotating metal recovery disk whose surface is made of Zr (zirconium) or a Zr alloy is used as a negative electrode, and a part of the rotating metal recovery disk is immersed in the treatment liquid, and a negative current is passed through the rotating metal recovery disk. It is described that the copper content in the treatment solution is electrodeposited on the surface in a powder form, and the copper powder is scraped off with a plate. The

[0009] In Reference 2, a rotating titanium metal recovery board is poured into a copper-containing acidic waste liquid as a force sword, and a copper powder is deposited on the force sword by electrolysis by flowing a predetermined force sword current. It is described that scraping and collecting continuously.

[0010] Document 3 describes that an electrode covered with a plastic film containing carbonaceous fine particles is placed in a metal ion-containing solution, and fine particles of deposited metal are formed on the surface of the film for recovery. And

[0011] In Reference 4, a copper plate coated with a plastic film containing carbonaceous fine particles on the surface of a copper plating is used as a cathode, and a solution-power metal containing metal ions is used as a cathode. It is described that it is recovered in the form of fine particles by electrolysis.

Patent Document 1: JP-A-53-86627

Patent Document 2: JP-A-53-55410

Patent Document 3: Japanese Patent Application Laid-Open No. 62-297485

Patent Document 4: Japanese Patent Laid-Open No. 63-259094

Disclosure of the invention

Problems to be solved by the invention

[0012] When copper is deposited on the surface of a rotating metal recovery disk or titanium metal recovery disk having a Zr or Zr alloy force on the surface by electrolysis, the copper adheres firmly to the metal recovery disk. , Making it difficult to scrape.

[0013] Also, when the electrodeposition plate surface is coated with a plastic film containing carbonaceous fine particles

Since copper is deposited in the form of powder on the film surface, the ability to easily remove the precipitate is less than 1 kg, for example, 210 g in 24 hours, and the recovery capability is poor. However, when the recovered powdered copper is dissolved and manufactured, the yield is low due to the powder, and it is difficult to reuse.

An object of the present invention is to provide a metal recovery apparatus that can efficiently recover a metal in a solution in a state where it can be easily reused.

Means for solving the problem

[0015] The present invention relates to an electrodeposited surface or a conductive plate to which a metal component deposited from a solution adheres, It is a metal recovery apparatus comprising a metal recovery board having an insulator formed around a recording electrode surface or part of the surface of the conductive plate.

The invention's effect

[0016] The metal recovery apparatus of the present invention is a metal circuit in which an insulator is formed around a pattern of an electrodeposition surface or a part of a conductive plate, and a metal component is deposited in a region not covered with the insulator. Since it has a collecting plate, it is possible to deposit the metal component in the solution on the metal collecting plate as a lump having a size that can be easily recovered and easily reused.

Brief Description of Drawings

FIG. 1 is a configuration diagram showing a metal recovery apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a first example of the structure of a metal recovery board used in the metal recovery apparatus according to the embodiment of the present invention.

FIGS. 3 (a) and 3 (b) are cross-sectional views showing a modified example of the first example of the structure of the metal recovery disc used in the metal recovery apparatus according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a second example of the structure of the metal recovery board used in the metal recovery apparatus according to the embodiment of the present invention.

FIGS. 5 (a) and 5 (b) are cross-sectional views showing a modified example of the second example of the structure of the metal collector used in the metal recovery apparatus according to the embodiment of the present invention.

FIG. 6 is a plan view showing a first example of the slit shape of the metal recovery board used in the metal recovery apparatus according to the embodiment of the present invention.

FIG. 7 is a plan view showing a second example of the slit shape of the metal recovery board used in the metal recovery apparatus according to the embodiment of the present invention.

FIG. 8 is a plan view showing a third example of the slit shape of the metal recovery board used in the metal recovery apparatus according to the embodiment of the present invention.

FIG. 9 is a plan view showing a fourth example of the slit shape of the metal recovery board used in the metal recovery apparatus according to the embodiment of the present invention.

FIG. 10 is a configuration diagram showing a first modified example of the scraping blade used in the metal recovery device according to the embodiment of the present invention.

[Fig. 11] Fig. 11 shows a scraping breaker used in the metal recovery apparatus according to the embodiment of the present invention. FIG. 6 is a configuration diagram showing a second modification of the battery and a modification of the electrolytic treatment tank.

FIG. 12 is a configuration diagram showing a third modified example of the scraping blade used in the metal recovery device according to the embodiment of the present invention.

FIG. 13 is a configuration diagram showing a fourth modification of the scraping blade used in the metal recovery device according to the embodiment of the present invention.

Explanation of symbols

[0018] 1: Electrolytic treatment tank

2: Metal recovery board

2a: Conductive plate

2b: Insulating film

2s: Sujiji

2t: Convex part

3; Rotating device

4: Anode

5: DC power supply

6, 60, 64, 65: Scraper blade

R: Pickling waste liquid

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIG. 1, a circular metal recovery board 2 in which at least a part is immersed in the pickling waste liquid R is disposed in the electrolytic treatment tank 1 in which the pickling waste liquid R is placed. The rotating device 3 is rotatably supported.

[0022] The metal recovery board 2 is used as a force sword (cathode) in the pickling waste liquid R and has a structure as shown in the cross section of FIG. 2 or FIG. / Speak.

[0023] The metal recovery board 2 shown in FIG. 2 includes a circular conductive plate 2a having a corrosion-resistant metal force and an insulating film 2b having a thickness of 0.1 mm to 10 mm formed on the surface of the conductive plate 2a. Have. Further, a part of the insulating film 2b on at least one side of the metal recovery board 2 is removed. Thus, for example, a slit 2s having a narrow width of 10 mm or less is formed. The slit 2s is a recess with respect to the surface of the conductive plate 2a.

Note that the slit 2s may be narrower on the conductive plate 2a side than on the opposite side as shown in FIG. 3 (a), or wider as shown in FIG. 3 (b). As shown in FIG. 3 (a), it is preferable to narrow the conductive plate 2a side because the metal electrodeposited on the metal recovery board 2 can be easily detached.

[0025] The metal recovery board 2 shown in Fig. 4 is, for example, a conductive plate made of a corrosion-resistant metal having a narrow convex part 2t formed at a height of 0.1 mm to 10 mm and a width of 10 mm or less on at least one surface. 2a and an insulating film 2b embedded around the convex portion 2t on the conductive plate 2a. Further, the portion of the insulating film 2b that exposes the convex portion 2t of the conductive plate 2a is a slit 2s. The convex portion 2t of the conductive plate 2a is formed by, for example, polishing and etching the conductive plate 2a. In the metal recovery board 2 shown in FIG. 4, the upper surfaces of the insulating film 2b and the protrusion 2t are substantially flat.

[0026] The convex portion 2t may be thinner on the conductive plate 2a side than the opposite side as shown in FIG. 5 (a), or thicker as shown in FIG. 5 (b). . As shown in FIG. 5 (a), it is preferable to make it narrow, because the metal electrodeposited on the metal recovery board 2 is easily detached.

In FIG. 2 to FIG. 5, for example, stainless steel is used as the corrosion-resistant metal constituting the conductive plate 2a, and the material constituting the insulating film 2b restricts the adhesion of the metal on the conductive plate 2a. For example, a resin such as fluorine resin or polypropylene is used.

[0028] As a method of forming the insulating film 2b on the conductive plate 2a, for example, a method of applying heat to the conductive plate 2a and the insulating film 2b in a combined state, or the conductive plate 2a and the insulating film 2b There is a method of adhering via an adhesive. The heating temperature in the case of applying heat is appropriately selected in consideration of the softening temperature of the insulating film 2b. The adhesive is selected in consideration of the adhesive strength with the conductive plate 2a and the insulating film 2b after solidification.

[0029] For example, as shown in FIG. 6, the slits 2s formed in the circular metal recovery board 2 have an annular planar shape formed in a plurality of concentric shapes with a predetermined pitch. The slit 2s is formed by fixing and bonding the insulating film 2b on the conductive plate 2a and then grinding a part of the insulating film 2b into a desired shape by machining.

[0030] The width of the slit 2s is large enough to facilitate the separation and removal of the metal mass growing on the conductive plate 2a. Is set to If the pitch between adjacent slits 2s is too narrow, the insulating film 2b is easily peeled off when the scraping blade 6 described later slides on the surface of the metal recovery board 2. Prefer U ,.

[0031] In order to increase the amount of metal deposited on the conductive plate 2a, the total area of the slits 2s is preferably large.

In the electrolytic treatment tank 1 in which the metal recovery board 2 is arranged, a corrosion-resistant material, for example, an anode 4 made of stainless steel of SUS304 is arranged at a position where it is immersed in the pickling waste liquid R. The anode 4 has a surface force on the side where the slit 2s is present in the metal recovery board 2 and is arranged at a predetermined interval. A DC power source 5 is provided between the anode 4 and the conductive plate 2b of the metal recovery board 2. It is connected.

[0033] In addition, above the electrolytic treatment tank 1, an angle-type scraping blade 6 for scraping a metal lump that grows the internal force of the slit 2s in the metal recovery panel 2 can contact and separate from the metal recovery panel 2 Is located. The scraping blade 6 is disposed so that the region force near the center of the metal recovery board 2 is inclined so that the position gradually decreases toward the region near the outer periphery.

[0034] Further, as a material constituting the scraping blade 6, a metal having a strength capable of scraping off a metal lump growing on the metal recovery board 2, for example, iron may be used, but a material having corrosion resistance. It is preferable to use a material such as stainless steel. Below the lower part of the scraper blade 6, a metal collection box 10 is attached.

A first pipe 8 connected to the suction port 7 a of the circulation tank 7 is connected to the discharge port la at the bottom of the electrolytic treatment tank 1. In addition, a second pipe 9 connected to the suction port lb at the top of the electrolytic treatment tank 1 is connected to the discharge port 7b at the top of the circulation tank 7.

[0036] A circulation pump 11 is attached in the middle of the first pipe 8, and the pickling waste liquid R in the electrolytic treatment tank 3 is circulated through the first pipe 8, the circulation tank 7 and the second pipe 9. It is configured as follows.

[0037] Next, recovery of the metal in the pickling solution R using the above-described metal recovery apparatus will be described. In this case, as the metal recovery board 2, a circular stainless steel plate is used as the conductive plate 2a shown in FIGS. 2 to 5, a fluorine resin film is used as the insulating film 2b, and a pitch as illustrated in FIG. Use an insulating film 2b in which a plurality of annular slits 2s having a diameter of 5 mm and a slit width of 1 mm and different diameters are formed.

[0038] First, an amount of pickling waste liquid R that immerses a part of the metal recovery board 2 is placed in the electrolytic treatment tank 1. The The pickling waste liquid R in this case is, for example, a sulfuric acid aqueous solution used for removing acid on the surface of the copper body or copper alloy body, and contains copper.

Subsequently, the conductive plate 2 a and the anode 4 of the metal recovery board 2 are energized through the pickling waste liquid R by the DC power source 5. As a result, electrolysis occurs, and copper in the pickling waste liquid R is deposited on the surface of the conductive plate 2a exposed from the slit 2s on the surface of the metal recovery board 2.

[0040] If the current density flowing between the conductive disc 2a and the anode 4 is small, the recovery capability is lowered. On the other hand, if the current density is large, the recovery amount is saturated quickly, and unnecessary energization time is generated. Therefore, it is necessary to investigate in advance the current density that is the optimum value. The conditions for energization in this embodiment are, for example, a current of 5 to 70 dAZmm ² and a voltage of 1 to 20V.

As the copper deposition proceeds, a copper lump B is formed on the surface of the metal recovery board 2 along the slit 2s as shown in FIGS. The copper mass B protrudes from the surface of the insulating film 2b by continuous deposition.

It should be noted that when copper is deposited by electrolysis, the metal recovery board 2 is rotated at a predetermined speed by the rotating device 3.

[0043] After the precipitation is saturated, when the scraping blade 6 is pressed against the surface of the metal recovery board 2 where the slit 2s is formed, and the metal recovery board 2 is further rotated by the rotating device 3, The copper block B protruding from 2s is scraped off by the scraping blade 6 and peeled off from the metal recovery board 2. The copper block B scraped off at the top of the scraping blade 6 falls into the collection box 10 placed under the blade 6, for example.

[0044] Here, since the width of the slit 2s formed in the insulating film 2b of the metal recovery board 2 is as narrow as 10 mm or less, the base of the copper block B is thin and easily peeled or broken. It is. Therefore, it is easy to remove the copper block B from the metal recovery board 2 by the scraping blade 6, and the recovered copper block B can be reused efficiently.

Note that the slit 2s of the insulating film 2b covering the conductive plate 2a may be provided only on one side of the conductive plate 2a, or may be provided on both sides. It is preferable to provide slits 2 on both sides because the amount of recovery increases. Further, one metal recovery board 2 may be provided, but two or more metal recovery boards may be provided. Two or more sheets are preferable because the collection amount increases. In the case of two or more sheets, they may be arranged in parallel or on the same axis. In addition, the present invention may have a structure other than a plate shape as long as it has an electrodeposition surface that is not limited to the conductive plate 2a as the metal recovery portion. For example, an apparatus for providing a slit 2a on the curved surface side of the drum and collecting the metal by electrodeposition is also included in the present invention. Also included in the present invention is a device that attaches a metal mesh to an insulating plate made of resin and deposits the metal by electrodeposition, in which case the mesh metal pattern becomes the electrodeposition surface. It will be surrounded by an insulator. That is, a metal recovery apparatus comprising a metal recovery board having an electrodeposition surface to which a metal component deposited from a solution adheres and an insulating film formed on a part of the surface of the electrodeposition surface. I just need it.

Furthermore, the metal recovery apparatus of the present invention is not limited to the drawings used in the above description. That is, it is only necessary that the metal recovery plate 2 and the scraping blade 6 are in contact with each other and their positional relationship is relatively moved so that the electrodeposited metal can be detached. In addition, the metal recovery board 2 is not limited to a disk but can be a square type. Furthermore, even if the metal collector 2 does not rotate, it can be fixed even if it is fixed!

[0048] The metal recovery apparatus of the present invention has a configuration for recovering metal, and among metals, gold or gold alloy, silver or silver alloy, nickel or nickel alloy, zinc or zinc alloy, tin or Tin alloys, copper or copper alloys can be recovered. Most suitable for recovery are copper or copper alloys.

[0049] Next, as the metal recovery board 2, three types of structures were used. Furthermore, instead of the metal recovery board 2, four types of disks with the conventional structure were used. Explain the ability based on experimental results!

First, as Example 1, a first metal recovery board 2 having an annular slit 2s shown in FIG. 6 and a structure shown in FIG. 2 was produced. As Example 2, a second metal recovery board 2 having an annular slit 2s shown in FIG. 6 and a structure shown in FIG. 4 was produced. Example A metal recovery board 2 according to Example 2 is composed of a conductive plate 2a made of a circular stainless steel plate having a diameter of 800 mm and a thickness of 10 mm, and a lmm-thick fluorine resin (fixed or bonded to the surface). And an insulating film 2b which also has a (trafluoroethylene) force. The annular slits 2s formed in the insulating films 2b are concentric circles having a pitch of 5 mm and a width of 1 mm.

[0051] Further, as Example 3, as shown in FIG. A third metal recovery board 2 having a plurality of slits 2s and having the cross-sectional structure shown in FIG. 2 was produced. The metal recovery board 2 according to Example 3 is composed of a conductive plate 2a formed of a circular stainless steel plate having a diameter of 800 mm and a thickness of 10 mm, and a polyamide substrate having a thickness of 1 mm fixed or bonded to the surface thereof. The width of the slit 2s formed in the insulating film 2b is 1 mm, and the pitch is about 5 mm.

[0052] As Comparative Example 1 of the conventional structure, a stainless steel disc not covered with an insulator was manufactured. Further, as Comparative Example 2, a stainless steel disk having a surface coated with Zr was produced, and as Comparative Example 3, a titanium disk was produced. Further, as Comparative Example 4, a stainless disc coated with a plastic containing carbon fine particles was produced. The diameter of the disks according to Comparative Examples 1 to 4 is 800 mm.

[0053] Then, each of the metal recovery boards 2 according to Examples 1 to 3 is sequentially attached to the rotation device 3 of the metal recovery apparatus shown in Fig. 1, and the disks of Comparative Examples 1 to 4 having a conventional structure are attached. Instead of the metal recovery board 2 shown in FIG. For each, the copper recovery state of the pickling waste liquid R force was examined, and the results shown in Table 1 were obtained.

[0054] In the metal recovery apparatus used in the experiment, the anode 4 also constituted a stainless steel of SUS304. The distance between the anode 4 and the metal recovery board 20 of the example and the distance between the anode 4 and the disk of the comparative example were both set to 20 mm. The scraper blade 6 is made of a rectangular parallelepiped stainless steel having a width of 50 mm, a thickness of 20 mm, and a length of 600 mm.

[0055] The components of the pickling waste solution before the copper recovery before the experiment were examined, and it was found that copper was 71 gZL (gram Z liter), sulfuric acid was 16.5 g / hydrogen peroxide was 2.7 gZL. The amount of the pickling waste liquid entering the electrolytic treatment tank 1 was 200L. Furthermore, the energization conditions with the DC power source 5 were set at an average voltage of 3.2 V and a current of 542 A, and energized for 32 hours.

[0056] [Table 1] Disc insulators and coins are collected and collected.

Material Ting shape State (註) Copper Kg

Shape

Example Stainless steel Fluorine-based grease ○ Copper lump 10. 3

1 Concentric slip

卜

Example Stainless steel Fluorine-based resin ○ Copper lump 11. 9

2 (Concentric (recessed only)

Convex part installation)

Example Stainless steel Polyamide O Copper block 9. 7 3 Radial slip

卜

Comparison example Stainless steel 银ノ, "X Copper block 11. 6 1

Comparative example Stainless steel C ”Δ Copper lump 10. 8 2 Zr coating

Comparative example Titanium Δ Copper ingot 11. 1 3

Comparative example Stainless steel Plastic containing carbon fine particles 0. 3 4

Cook

(註) Contact state: ○… Good, △… Defective, X… Unable to scrape

[0057] As is apparent from Table 1, when the metal recovery board 2 according to Examples 1 to 3 was used as a force sword, the scraping state by the scraping blade 6 was good, and the copper The amount recovered was also large.

[0058] On the other hand, in Comparative Example 1, the copper lump was in close contact with the disk that was a force sword and could not be scraped off. In Comparative Example 2 and Comparative Example 3, it was possible to peel off the precipitate on the disc, but it was impossible to remove it. Furthermore, in Comparative Example 4, an optimal current could not be applied, and the deposit on the disk surface was easily scraped off, but the amount recovered was small.

In the above-described embodiment, the force recovery target described for the experimental results of copper recovery is not limited to copper, and other metals can be recovered. Select an appropriate material for the insulating film 2b of the storage 2. For example, when silver is recovered from a cyanogen-containing alkaline solution containing silver, fluorine resin is preferably used as a constituent material of the insulating film 2b.

[0060] By the way, the slits of the metal recovery board 2 are not limited to the shapes of the circular ring and the radial straight line as shown in FIGS. 6 and 7, but concentric and radial slits are combined as shown in FIG. The shape may be a rectangular shape or a dot-shaped island shape as shown in FIG. 7, or it may be a spiral shape not shown.

In the metal recovery board 2 shown in FIG. 8, the interval between the concentric slits and the radial slits is adjusted so that the plurality of island-shaped insulating films 2b separated by the slits 2s are substantially constant. Further, in the metal recovery board 2 shown in FIG. 7, the slit 2s has a size of about lmm × 1mm in the case of a plurality of rectangular shapes, and a circle having a diameter of lmm in the case of a plurality of dot shapes.

[0062] The slit 2s shown in FIGS. 6 to 9 may have a structure in which the conductive plate 2a is present under the concave portion of the insulating film 2b as shown in FIGS. As shown in FIG. 5, the insulating film 2b may be present around the protrusion 2t of the conductive plate 2a.

[0063] In the metal recovery board 2 shown in Figs. 4 and 5, a method is adopted in which the convex portion 2t is formed on the conductive plate 2a and then the periphery thereof is filled with an insulating material. A method of grinding the plate 2a may be employed, or a method of etching the conductive plate 2a may be employed. For example, in the metal recovery board 2 shown in FIG. 9, after grinding in two directions intersecting the conductive plate 2a to form a rectangular convex part 2t, the ground part is coated with an insulating material. Is adopted.

[0064] The copper mass grown in the slits 2s of the four types of metal recovery discs 2 shown in Figs. 6 to 9 was peeled off.

As a result, as shown in FIG. 7, the metal recovery plate 2 having the radial slits 2s was easier to peel off the copper mass than the metal recovery plate 2 having the concentric slits 2s shown in FIG. . In addition, as shown in FIG. 8, the metal recovery plate 2 having slits 2s that are concentric and radial in shape can have a larger electrodeposition area than the metal recovery plate 2 shown in FIGS. The copper lump was also easier to scrape than the metal recovery board 2 shown in Fig. 6. Furthermore, it is difficult to increase the electrodeposition area of the metal recovery plate 2 having the rectangular or dotted slit 2s as shown in FIG. 9 compared to the metal recovery plate 2 as shown in FIG. Peeling is relatively easy Met.

[0065] The scraping blade 6 applied to the metal recovery apparatus described above is not limited to the angle type, and for example, a scraping blade having a structure shown in FIGS. 10 to 12 may be used.

[0066] The scraping blade 60 shown in FIG. 10 is attached to the blade body 61 and the rectangular blade body 61 inclined so that the central force of the circular metal recovery board 2 is lowered toward the outer periphery. It has a vibrating device 62 and a sawtooth-shaped jagged projection 63 attached to the upper surface of the blade body 61 and obliquely hitting the slit 2s extending method. The upper surface of the blade body 61 has an area for sliding the metal block scraped from the metal recovery board 2 by the protrusion 63.

[0067] The metal lump on the metal recovery board 2 scraped off by the protrusion 63 slides on the blade body 61 due to vibration by the vibration device 62 and the weight of the metal lump, and the recovery box 10 behind the scraper blade 60 10 fall into.

[0068] Further, when the protrusion 63 of the scraping blade 60 has a sawtooth shape, the protrusion 63 can scrape the metal mass at a desired angle depending on the angle of the sawtooth. Compared to the straight blade 6 shown in Fig. 5, the metal lump can be peeled off easily. The angle is oblique to the tangential direction when the slot 2s is annular.

[0069] As shown in FIG. 11, the scraping blade 60 may have a structure in which comb-like protrusions 63a are arranged at positions that move on the annular slit 2s of the metal recovery board 2. . In this case, the protrusion 63a moves on the slit 2s by the rotation of the metal recovery board 2 and scrapes off the metal lump.

The scraping blade 64 shown in FIG. 12 is a blade that reciprocates in the direction perpendicular to the longitudinal direction of the slit 2 s of the metal recovery board 2. Further, the bottom of the electrolytic treatment tank 1 below the scraping blade 64 has an inclined surface Id for sliding the metal lump C that has been scraped and dropped to move to the circulation tank 7, and the bottom of the inclined surface Id The lower part Is has an outlet le. A pipe 13 for guiding the metal block C to the filter 12 of the circulation tank 7 is attached to the discharge port le, and the metal block C that has passed through the discharge port le is recovered by the filter 12 of the circulation tank 7 and pickled. The waste liquid R is configured to enter the circulation phase 7 through the filter 12.

[0071] When a structure in which the metal block C is not collected by the filter 12 is adopted, the electrolytic treatment is performed. A structure may be adopted in which a stopper is provided in front of the lower part Is of the tank 1 so that the metal block C does not fall into the circulation tank 7.

The scraping blade 65 shown in FIG. 13 is rotatably mounted with the end portion of the horizontally long rectangular blade body away from the metal recovery board 2 central force as a fulcrum. A rotating device 66 that flips the blade body upward is attached to the fulcrum. Further, the collection box 10 is disposed outside the fulcrum of the scraping blade 65.

[0073] The scraping blade 65 scoops up the metal lump C on the metal recovery board 2 as the horizontal state force is also lifted upward by the rotating device 66, and the scraped metal lump C Bounce it up and put it in the collection box 10.

[0074] Next, the scraping blade 65 is rotated in the same direction as the jumping direction to scrape the metal lump on the metal recovery board 2 and then perform the jumping operation.

Claims

The scope of the claims

[I] A metal recovery apparatus comprising a metal recovery board having an electrodeposition surface to which a metal component deposited from a solution adheres and an insulator formed around the electrodeposition surface.

[2] The metal recovery device according to claim 1, wherein the electrodeposition surface is a surface of a conductive plate, and the insulator is formed on a part of the surface of the conductive plate. .

[3] The metal recovery apparatus according to claim 1 or 2, wherein the electrodeposition surface is a force sword for depositing the metal component in the solution by electrolysis.

[4] The electrodeposition surface according to any one of claims 1 to 3, wherein the electrodeposition surface is rotatably attached. The metal recovery device according to any one of the above.

[5] The metal recovery apparatus according to any one of [1] to [4], wherein the insulator is formed with a slit exposing the electrodeposition surface.

6. The metal recovery apparatus according to claim 5, wherein the electrodeposition surface is circular, and the slit has a plurality of concentric ring shapes.

7. The metal recovery apparatus according to claim 5, wherein the slit has a rectangular shape extending radially on the electrodeposition surface.

[8] The convex portion is formed on at least one surface of the electrodeposition surface, and the insulator is formed around the convex portion. The metal recovery apparatus as described.

[9] The metal recovery device according to any one of [1] to [8], wherein the insulator is made of resin.

[10] The metal recovery apparatus according to any one of [1] to [9], further comprising a scraping blade for scraping the lump of the metal component deposited on the electrodeposition surface. .

[II] The metal component is copper or a copper alloy, and the solution is a pickling solution.

«Nf seeking

The metal recovery apparatus according to claim 1.