JPH07150383A - Production of high-purity metal from waste of metal working and device therefor - Google Patents

Abstract

PURPOSE:To more efficiently electrolyze a large amt. of scrap metal and to effectively reutilize the scrap metal. CONSTITUTION:A scrap metal 2 is dissolved in a dissolution tank 1 independent of an electrolytic cell 4. The soln. 3 is supplied to the electrolytic cell 4 and electrolyzed. The soln. 3 is returned to the dissolution tank 1 and used to dissolve the scrap metal 2. The device for producing a high-purity metal is provided with the dissolution tank 1 for dissolving the scrap metal 2 in acid, a means 9 for transferring the soln. 3 to the cell 4 and the cell 4 for electrolyzing the soln. 3 supplied from the transfer means 9 and depositing the metal on the surface of a cathode 5. The tank 1 for dissolving the scrap metal 2 is separated from the cell 4 for electrolyzing the soln. 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of converting a waste metal, which is a waste material of metal processing, into a high-purity metal which has a very high need for, for example, a research base metal, a special alloy raw material, and various other research and development purposes. With the device.

[0002]

2. Description of the Related Art Huge amounts of chips are generated in various industries for cutting or grinding metal. Waste metalwork is generated as long as machining continues. The Recycling Law has been enacted in order to make good use of waste metals, and the focus is on reusing resources. However, it is economically very difficult to effectively reuse the waste metal. This is because the price of waste metal such as scrap iron has fallen, and the profitability of recycling waste iron by recyclers has become unprofitable. Even in such an environment, waste metal is an important resource, and it is eagerly needed to effectively use it. The reality is that companies that generate large amounts of waste metal dispose of them ignoring profitability.

Waste metal generated when cutting or grinding metal is very bulky and time-consuming to dispose. In order to make it compact, it is pressed together into solid waste iron, which is then melted in a furnace to be re-ironed. A small amount of waste iron is completely oxidized into Fe ₂ O ₃ powder, which is used for red iron oxide paint and glass coloring (red glass).

In recent years, the number of types of iron alloys in which various metals have been added to steel materials has increased and the amount thereof has become enormous, making recycling of waste metals even more difficult. The present inventor has noticed that waste iron is electrolyzed into highly pure electrolytic iron and effectively reused as a metal with high added value. A technique for electrolyzing a metal to obtain high-purity iron is described in Japanese Patent Publication No. 3-53394. In the method of producing electrolytic iron described in this publication, iron having a predetermined shape is connected to the anode and high-purity electrolytic iron is deposited on the cathode.

[0005]

In the production method described in this publication, it is difficult to quickly dissolve the raw material iron to be connected to the anode in the acid solution, and it is not possible to increase the production amount per hour. If the raw material iron cannot be dissolved in the acid solution, it cannot be deposited on the cathode. This is because the molten iron is electrolyzed and attached to the anode. In particular, with iron, when a high current is applied in a state in which the raw material iron cannot be sufficiently dissolved, ferrous ions contained in the solution become ferric ions. In order to produce high-purity electrolytic iron, the solution needs to be ferrous ions. This is because when the ferric ion is formed, the solution becomes cloudy reddish brown and high-purity iron cannot be deposited. The amount of waste iron, which is a waste material of metal processing, is enormous. Therefore, a method with a low processing capacity cannot be actually used even if it becomes a high value-added electrolytic iron. Further, the method for producing electrolytic iron described in this publication has a drawback that the raw material iron is formed into a predetermined shape, so that the raw material cost is high and the production cost of the produced electrolytic iron is high.

Further, Japanese Patent Publication No. 53-28156 discloses a method of recovering iron by electrolyzing waste acid obtained by pickling steel. This is a method of electrolyzing and recovering iron ions contained in a large amount in waste acid. This method can recover and effectively utilize iron contained in waste acid, but waste iron, which is a waste material of metal processing, cannot be made into high-purity electrolytic iron.

The present invention has developed a technique of dissolving waste metal in an acid solution and electrolyzing it to obtain a high-purity electrolytic metal for the purpose of solving these various conventional problems (international application). No. PTC / JP 92/00982). This method has the advantage that it can be effectively reused as a metal material of extremely high added value because it electrolyzes almost no-value waste metal into a high-purity electrolytic metal. The present invention has been developed for the purpose of further improving this method to more efficiently electrolyze a large amount of waste metal and effectively reuse it.

[0008]

In order to achieve the above-mentioned object, a method and an apparatus for producing a high-purity metal from a metal processing waste material of the present invention has the following constitution. When electrolyzing waste metal to produce high-purity electrolytic iron, it is important to quickly dissolve the waste metal. This is because the dissolution rate affects the amount of waste metal that can be processed per unit time. A solution having a high concentration of waste metal can flow a large current through the electrode of the electrolytic cell to deposit a large amount of electrolytic metal. Further, the solution having a high metal concentration reduces the electric resistance between the electrodes, reduces the power loss in the electrolytic cell, and improves the power use efficiency. This is extremely important for a device for electrolyzing waste metal. This is because the electrolytic metal consumes a large amount of power and is deposited on the surface of the electrode. The amount of electrolytic metal deposited on the surface of the electrode is proportional to the current. However, the power supplied to the electrolytic cell is the product of the current and the voltage across the electrodes. Therefore, it is very important to reduce the voltage between the electrodes in order to reduce the power loss of the electrolytic cell. The method and apparatus for producing a high-purity metal according to the present invention has a unique constitution and promptly dissolves a waste metal in a dissolution liquid to efficiently produce an electrolytic metal.

That is, the method for producing a high-purity metal of the present invention is to dissolve a waste metal, which is a waste material of metal processing, in an acid solution, and electrolyze the solution in which the waste metal is dissolved in an electrolytic cell to form a metal on the electrode. It is an improved method for producing high-purity metal by precipitating. In the method for producing a high-purity metal of the present invention, waste metal is melted in a melting tank which is a tank different from the electrolytic tank. It is characterized in that a solution obtained by dissolving the waste metal in the melting tank is supplied to the electrolytic tank for electrolysis.

Further, in the method for producing a high-purity metal according to the second aspect, the waste metal is melted in a melting tank which is a tank different from the electrolytic tank, and the dissolved solution in which the waste metal is melted in the melting tank is put in the electrolytic tank. It is characterized in that the solution is supplied and electrolyzed, and at the same time, the solution in the electrolytic cell is returned to the solution tank and reused as a solution for dissolving the waste metal.

The apparatus for producing high-purity metal according to claim 3 further comprises a dissolution tank for dissolving waste metal, which is a waste material of metal processing, in an acid solution, and a dissolution liquid in which the waste metal is dissolved in this dissolution tank. It comprises a transfer means for transferring to the electrolytic cell, and an electrolytic cell for electrolyzing the solution supplied from the transfer means to deposit a metal on the surface of the electrode. The melting tank for dissolving the waste metal is separated from the electrolytic tank for electrolyzing the solution. The high-purity metal is produced by electrolyzing the solution in which the waste metal is dissolved in the melting tank in the electrolytic tank.

Further, in the apparatus for producing high-purity metal according to the fourth aspect, a dissolving tank for dissolving waste metal, which is a waste material of metal processing, in an acid solution, and the waste metal is dissolved in this dissolving tank. A transfer means for transferring the solution to the electrolytic cell, an electrolytic cell for electrolyzing the solution supplied from the transfer means to deposit a metal on the surface of the electrode, and a reflux means for refluxing the solution in the electrolytic cell to the solution tank. With. The solution, which has been electrolyzed in the electrolysis tank and whose metal ion concentration has decreased, is returned to the dissolution tank and reused to dissolve the waste metal.

[0013]

The apparatus of FIG. 1, which is a preferred embodiment of the method and apparatus for producing high-purity metal from waste metalwork of the present invention, comprises:
The waste metal is made into a high-purity electrolytic metal as described below.

Waste metal, which is a waste material of metal processing, is melted in the melting tank 1. An acid solution such as sulfuric acid is placed in the dissolution tank 1. Waste metal 2 such as iron is dissolved in an acid solution to form a solution. Since the waste metal 2 is a chip obtained by cutting or grinding metal, it has a large surface area with respect to weight and is quickly dissolved. The waste metal 2 is dissolved in the dissolution tank 1, and the solution 3 becomes a high-concentration solution containing a large amount of metal ions.

The solution 3 containing a high concentration of metal ions is supplied to the electrolytic cell 4. The electrolytic bath 4 electrolyzes the solution 3. When the solution 3 is electrolyzed, the waste metal 2, such as iron, which is a solution metal, is deposited and deposited on the surface of the negative electrode 5. The metal such as iron deposited here is a highly pure electrolytic metal. The solution 3 in which the metal ions electrolyzed in the electrolytic bath 4 are deposited on the electrodes has a low concentration of metal ions. The solution 3 having a reduced concentration is sent to the dissolution tank 1 by the reflux means 7, and the waste metal 2 is again dissolved therein.

As described above, when the waste metal 2 is melted in the melting tank 1 which is a tank different from the electrolytic tank 4, a large amount of the waste metal 2 is discharged.
Can be efficiently and promptly dissolved and electrolyzed. The dissolution tank 1 is enlarged, a large amount of waste metal 2 is charged therein, and a dissolution liquid 3 containing high-concentration metal ions is prepared therein, and this is dissolved in the electrolytic tank 4.
To supply a large amount of metal with a large current. Therefore, the apparatus and method of the present invention can efficiently process a large amount of waste metal 2 to obtain a high-purity electrolytic metal.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples described below exemplify a method and an apparatus for embodying the technical idea of the present invention, and the present invention provides a method and an apparatus for producing a high-purity metal as follows. Not specified.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

A specific example of treating the most abundant waste iron as a waste metal which is a waste material of metal processing will be described in detail below. For metals other than iron, similar devices can be used in the same way to make electrolytic metals.

The apparatus for producing high-purity metal shown in FIG.
Dissolution tank 1 for dissolving waste metal 2 which is a waste material of metal processing in an acid solution, supply means 8 for supplying waste metal 2 to this dissolution tank 1, and solution 3 for dissolving waste metal 2 in dissolution tank 1 To the electrolytic bath 4, an electrolysis bath 4 for electrolyzing the solution 3 supplied from the transport means 9 to deposit a metal on the surface of the negative electrode 5, and the solution 3 in the electrolysis bath 4 is dissolved. A recirculation means 7 for recirculating to the tank 1 is provided.

The supply means 8 comprises a hopper 8A for storing the waste metal 2 and a conveyor 8B for transferring the waste metal 2 in the hopper 8A to the melting tank 1. The conveyor 8B is controlled by the control means 10 for measuring the metal ion concentration of the dissolution tank 1 to control the metal ion concentration of the dissolution tank 1 to a set value. When the conveyor 8B supplies the waste metal 2 to the melting tank 1, the metal ion concentration of the solution 3 becomes high.

The control means 10 operates the conveyor 8B when the metal ion concentration in the melting tank 1 becomes lower than the set value. When the metal ion concentration becomes higher than the set value, the operation of the conveyor 8B is stopped. The control means 10 is connected to a sensor (not shown) that detects the metal ion concentration of the solution 3. A sensor for measuring the conductivity of the solution 3 can be used as the sensor for the metal ion concentration. This is because the conductivity of the solution 3 increases as the metal ion concentration increases. The control means 10 shown in FIG. 1 also controls the heater 11 that heats the solution 3. The heater 11 heats the solution 3 and
Makes waste metal 2 easy to melt. However, since the heat generated when the waste metal 2, iron, is dissolved in sulfuric acid, the heater 11 does not need to constantly heat the solution 3. When the temperature of the solution 3 reaches the set value, the control means 10 stops energizing the heater 11.

The dissolution tank 1 dissolves the degreased waste metal 2 in an acid solution, and comprises a main body tank 1A for dissolving the waste metal 2 and a filtration tank 1B. Although strong acids such as sulfuric acid, hydrochloric acid, and nitric acid can be used as the acid solution to be placed in the main body tank 1A, sulfuric acid is most suitable. This is because hydrochloric acid produces chlorine and nitric acid produces nitric oxide.

In the filtration tank 1B, the solution 3 of the main body layer is filtered by the filter 12 and the solution 3 which has passed through the filter 12 is passed through.
Store. The filter 12 removes carbon, silicon, and the like that are not dissolved in the acid solution, and removes solid matter mixed in the solution 3.

The transfer means 9 is a pump for transferring the solution 3 stored in the filtration tank 1B to the electrolytic tank 4. The pump supplies the solution 3 having a high metal ion concentration from the filtration tank 1B to the electrolytic tank 4
And the metal ion concentration in the electrolytic bath 4 is maintained at a high concentration.

The electrolytic cell 4 has a negative electrode 5 in the center and positive electrodes 6 on both sides thereof. -A stainless plate can be used for the electrode 5. -In the vicinity of the stainless plate which is the electrode 5,
The solution 3 is supplied by the transfer means 9. The + electrode 6 is an anode bag made of a conductive metal in the form of a cage, and is filled with waste iron. The anode bag 6A is electrically connected to the waste iron. Waste iron energized through the anode bag 6A replenishes the solution 3 with ferrous iron ions. The block type 2A is most suitable for the waste iron put in the anode bag 6A. This is because the electrical contact with the anode back 6A is good.

The electrolyzer 4 contains a heater 11. The heater 11 heats the solution 3 in the electrolytic bath 4 to a predetermined temperature. In the heated solution 3, the mobility of ions is improved and the electric resistance is lowered. Therefore, the electrode voltage can be lowered to allow a large current to flow, and power can be effectively used.

The concentration of metal ions in the solution 3 in the electrolytic cell 4 decreases as the electrolysis proceeds. The reflux means 7 is a transfer pump of the dissolution tank 1 and transfers the dissolution liquid 3 having a reduced metal ion concentration to the dissolution tank 1. In the apparatus shown in FIG. 1, the pumps of the reflux means 7 and the supply means 8 are connected and operated, and the solution 3 having a high metal ion concentration is electrolyzed from the dissolution tank 1 to the electrolytic tank 4. The solution is circulated from the tank 4 to the solution 3.

A method for collecting high-purity electrolytic iron from a metal processing waste material using the apparatus for manufacturing high-purity metal shown in FIG. 1 will be described with reference to the flowchart of FIG. Waste iron, which is a waste material of metal processing, uses three types of powder, such as powdered abrasive iron powder, thin and linear chips, and block-type solid iron scrap. Degreasing Step (FIG. 2) When the metal is deposited on the cathode by using the electrolysis method, it is not preferable that the solution 3 is contaminated with oil. In order to prevent the solution 3 from being contaminated, the waste iron as a raw material is previously degreased with alkali or washed with acetone. Step of Chemically Dissolving in Acid Solution (FIG. 2) The acid solution (sulfuric acid or hydrochloric acid) in the main body tank 1A of the dissolution tank 1 may be at room temperature, but is preferably heated to 50 ° C to 60 ° C. This is to increase the solubility of waste iron. When waste iron is dissolved in an acid solution, a high-concentration solution 3 containing ferrous iron is obtained. The solution 3 containing a high concentration of ferrous ions can be electrolyzed at a large current density to efficiently produce electrolytic iron. The waste iron is dissolved by the acid solution contained in the main body tank 1A of the dissolution tank 1. Powder waste iron and flaky waste iron are charged into the main body tank 1A by the supply means 8. The discarded waste iron is dissolved in the acid solution to increase the metal ion concentration of the solution 3.

The solution 3 having a high metal ion concentration is filtered by the filter 12 and then sent to the electrolytic cell 4 by the transfer means 9. The solution 3 sent to the electrolytic cell 4 is electrolyzed and the amount of metal ions is reduced. The solution 3 having a reduced metal ion concentration is returned to the main body tank 1A by the reflux means 7. The dissolved solution 3 thus circulated dissolves the waste iron in the main body tank 1A and is transferred to the electrolytic bath 4, and the dissolved solution 3 having a reduced metal ion concentration is circulated in the electrolytic bath 4 and discarded. Helps dissolve iron. Therefore, the dissolution liquid 3 can be used efficiently, and the transfer means 9 and the reflux means 7 can be continuously operated to constantly fill the electrolytic cell 4 with a high concentration of ferrous iron ions to efficiently produce electrolytic iron.

The waste iron supplied to the main body tank 1A is machined to form a large amount of iron scraps such as iron dust and chips, and has a large surface area, so that the waste iron dissolves very quickly in the acid solution in the main body tank 1A. This is very important in order to use a huge amount of waste metal 2 as an electrolytic metal. This is because the processing capacity per unit time can be increased. Waste iron quickly dissolved in the main tank 1A
A high concentration of ferrous ion is replenished to the electrolytic cell 4. This is an important point in the present invention that can rapidly treat a large amount of waste iron.

Filtration Step (Step of FIG. 2) The solution 3 in which the waste iron is dissolved in the main body tank 1A is filtered by the filter 12. This is because impurities such as carbon and silicon that are not dissolved are removed. The filter 12 is the reflux means 7
It is also possible to remove the oxidative precipitate contained in the solution 3 sent from the electrolytic cell 4. In addition, the filter 12
The oxidative precipitate deposited on the above is redissolved in the dissolving solution 3 that is flowing down, reduced, and transferred to the electrolytic cell 4. The filtered solution 3 becomes a high-concentration iron sulfate solution. The filtration may be a primary or secondary filtration, if necessary. Furthermore, it is also possible to carry out ion exchange to obtain the solution 3 containing only ferrous ions.

Step of Electrolyzing Dissolved Solution in Electrolyzer (Step of FIG. 2) The electrodes of the electrolytic cell 4 are energized to electrolyze the solution 3.
As the electrolysis proceeds, ferrous iron ions contained in the solution 3 are deposited on the surface of the negative electrode 5. -The amount of iron deposited on the electrode 5 is proportional to the magnitude of the applied current and the time. Theoretically, when electricity of 96500 coulomb is applied,
An equivalent amount of iron is deposited on the electrode 5 in an amount of 1 gram.

As the electrolysis progresses, the useful ferrous ions, which are useful divalent iron ions contained in the solution 3, are
By air oxidation or anodic oxidation, ferric ions, which are trivalent iron ions harmful to the production of electrolytic iron, are formed. Further, the ferrous ions contained in the solution 3 are reduced, and the rate of producing electrolytic iron becomes slower. In order to replenish the electrolytic bath 4 with ferrous iron, a block type solid iron scrap is put in the anode back 6A of the + electrode 6 and electrolysis is performed. The solid iron scrap contacts the anode bag 6A and is energized, gradually dissolves in the solution 3 to replenish the ferrous ions, and at the same time, prevents the ferrous ions from becoming ferric ions.

The anode back 6A is covered with a cloth 13 in order to prevent carbon and the like contained in the solid iron scrap contained in the anode back 6A from mixing into the solution 3 and forming slag. As described above, the method of putting solid iron scrap into the anode bag and electrolyzing the solid iron scrap has a feature that the solid iron scrap can be effectively used. As the cathode, a stainless material is arranged between the anode bags on both sides, and electrolytic iron is deposited on both sides.

When the electrolytic bath 4 electrolyzes the solution 3, if the solution 3 is raised, the conductivity of the solution is improved, and a large amount of electrolytic iron can be deposited by electrolysis at a high current density. Specifically, the heater 11 heats the solution 3 to about 50 to 90 ° C.

Step of Transferring Low Concentration Iron Ion Liquid to Melting Tank (Step of FIG. 2) This step is a step of treating while electrolyzing in the electrolytic bath 4. When the electrolysis is continued, oxide sludge precipitates on the bottom of the electrolytic cell 4 and the ferrous ion concentration decreases. The reflux means 7 sucks the solution 3 at the bottom of the electrolytic bath 4 and circulates it in the dissolving bath 1. Dissolve waste iron in dissolution tank 1,
The iron sulfate solution sent from the electrolytic bath 4 to the dissolution bath 1 is regenerated.

Washing with water and drying (steps in FIG. 2) Washing with water and drying are performed so that the obtained electrolytic iron does not rust, and the production of the target high-purity electrolytic iron is completed.

When waste iron was electrolyzed under the condition of electrolysis as shown in Table 1, it was possible to produce high-purity electrolytic iron having the components shown in Table 2.

[0040]

[Table 1]

[0041]

[Table 2]

[0042]

EFFECTS OF THE INVENTION The method and apparatus for producing a high-purity metal from a metal processing waste material of the present invention has the following excellent features. INDUSTRIAL APPLICABILITY The present invention realizes effective reuse of waste metal, which has been considered difficult to reuse in terms of cost, as a highly pure electrolytic metal with extremely high added value. The completion of the present invention realizes an epoch-making feature that waste metal, which has been economically difficult to recycle, can be effectively reused as a high-purity metal with high utility value. The technology of the present invention, which effectively uses waste metal that has been conventionally discarded without being effectively used, makes it a highly valuable high-purity metal, makes it possible to save resources on a global scale. Effective use of increasingly important resources can be realized.

In particular, the present invention realizes an excellent feature that an enormous amount of waste metal can be efficiently treated to increase the treatment capacity per hour, and a large amount of waste metal can be efficiently made into a high-purity electrolytic metal. To do. This is because the waste metal is dissolved in a dissolution tank which is a tank different from the electrolysis tank, the waste metal is dissolved, and a solution containing a high concentration of metal ions is transferred to the electrolysis tank for electrolysis. Further, when the electrolytic bath and the melting bath are separated, the electrolytic bath does not need a structure for melting the waste metal. Therefore, the electrolytic cell can have the + -electrodes in an ideal arrangement in which the voltage drop between the electrodes is low, and furthermore, the solution containing a high concentration of metal ions can be supplied to the surface of the-electrode. . Therefore, there is a feature that the utilization efficiency of electric power can be increased and the electrolytic metal can be deposited efficiently.

Further, the melting tank can be a large tank which can supply a large amount of waste metal which is bulky but easily dissolved, and the melting amount per time can be increased so that a considerable amount of the waste metal can be quickly dissolved. There are features. The bulkiness of waste metal, which is a waste material of metal processing, has been a drawback in the conventional disposal method. On the contrary, this fact of the present invention can be effectively utilized to efficiently produce a high-purity metal. Most of the waste materials generated when processing metal are powdery such as polishing dust and flakes such as cutting chips, and are very bulky. This shape is an ideal shape for melting in a melting tank. This is because it is easily dissolved in an acid solution and can be rapidly dissolved without special processing. To produce electrolytic metal efficiently,
It is necessary to quickly dissolve the raw material metal. The raw metal is
If it is processed into a small size to increase the surface area relative to the weight, it can be dissolved quickly. In order to realize this, it is necessary to cut the raw material metal, and the pretreatment is troublesome. However, since the waste metal that dissolves in the melting tank is a waste material that has already been processed, the metal is processed into a shape that easily dissolves in the acid solution without any special cutting treatment. The conventional method of discarding waste metal has a drawback that the shape is bulky and requires special treatment such as pressing and compacting to increase the treatment cost. It is very preferable that the waste metal be bulky in the production method of the present invention because it can be quickly dissolved. The manufacturing method of the present invention, while conversely utilizing the conventional drawbacks, makes a metal of high added value efficiently. Further, according to the present invention, since the waste metal is melted in the melting tank which is a tank different from the electrolysis tank, even if the waste metal is bulky, the melting tank can be enlarged to efficiently dissolve the waste metal.

Further, when a solution having a high metal ion concentration is transferred from the dissolution tank to the electrolytic cell and a solution having a reduced metal ion concentration is transferred to the solution from the electrolytic cell, the electrolytic cell is maintained at a high concentration. In this way, the electric metal can be efficiently deposited, and the waste metal can be promptly dissolved in the solution with a low metal ion concentration. Therefore, there is a feature that a large amount of waste metal can be efficiently converted into a high-purity electrolytic metal.

Furthermore, since the main body and the apparatus for producing high-purity metal of the present invention use the waste material of metal processing which has been discarded until now as the raw material, the raw material cost is remarkably reduced,
It has the feature that a large amount of high-purity metal can be produced at a low price. In particular, in the method for producing a high-purity metal of the present invention, by using waste metal as a raw material, the production amount per hour can be increased, which also reduces the product cost. Therefore, the manufacturing method of the present invention can provide a high-purity metal as a raw material for research materials and products in the high-purity era at low cost, greatly contribute to the research of advanced technology, and greatly accelerate the development of products using high-purity metal. It also realizes the features to be applied.

[Brief description of drawings]

FIG. 1 is a block diagram showing a specific example of an apparatus for producing a high-purity metal from a metal processing waste material according to an embodiment of the present invention.

FIG. 2 is a flow chart diagram for producing high-purity metal using the apparatus shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Melting tank 1A ... Main body tank 1B ... Filtration tank 2 ... Waste metal 2A ... Block type 3 ... Melting solution 4 ... Electrolyte tank 5 ...- Electrode 6 ... + Electrode 6A ... Anode back 7 ... Refluxing means 8 ... Supplying means 8A ... Hopper 8B ... Conveyor 9 ... Transfer means 10 ... Control means 11 ... Heater 12 ... Filter 13 ... Cloth 14 ... Power source

Claims (4)

[Claims] 1. A waste metal (2), which is a waste material of metal processing, is dissolved in an acid solution, and a solution (3) obtained by dissolving the waste metal (2) is electrolyzed.
In the method of producing high-purity metal by electrolyzing at (4) -precipitating a metal on the electrode (5), the waste metal (2) is a dissolution tank (1) which is a separate tank from the electrolytic cell (4). The high-purity metal is produced from the metal processing waste material, which is characterized in that it is melted in the metal tank and the waste metal (2) is melted in the melting tank (1) and the solution is supplied to the electrolytic tank (4) for electrolysis. how to. 2. A waste metal (2), which is a waste material of metal processing, is dissolved in an acid solution, and a solution (3) obtained by dissolving the waste metal (2) is electrolyzed.
In the method of producing high-purity metal by electrolyzing at (4) -precipitating a metal on the electrode (5), the waste metal (2) is a dissolution tank (1) which is a separate tank from the electrolytic cell (4). Dissolve the waste metal (2) in the dissolution tank (1) and supply the solution (3) to the electrolysis tank (4) for electrolysis, and also dissolve the solution (3) in the electrolysis tank (4). A method for producing a high-purity metal from a waste material of metal processing, which comprises recirculating to a tank (1) and reusing it in a solution for dissolving a waste metal (2). 3. A melting tank (1) for dissolving a waste metal (2), which is a waste material of metal processing, in an acid solution, and a waste metal in this melting tank (1).
A transfer means (9) for transferring the solution (3) in which (2) is dissolved to the electrolytic cell (4) and the solution (3) supplied from the transfer means (9) are electrolyzed and-the electrode (5 ) And an electrolysis tank (4) for depositing a metal on the surface, and a dissolution tank (1) for dissolving the waste metal (2), and a dissolution liquid
(3) is electrolyzed to separate it from the electrolyzer (4), and the dissolution liquid (3) in which the waste metal (2) is dissolved in the dissolution tank (1) is electrolyzed in the electrolysis tank (4). Equipment for producing high-purity metal from metal processing waste materials. 4. A dissolution tank (1) for dissolving a waste metal (2), which is a waste material of metal processing, in an acid liquid, and a waste metal in the dissolution tank (1).
A transfer means (9) for transferring the solution (3) in which (2) is dissolved to the electrolytic cell (4) and the solution (3) supplied from the transfer means (9) are electrolyzed and-the electrode (5 ) Electrolytic cell to deposit metal on the surface (4)
And a reflux means (7) for refluxing the solution (3) of the electrolytic cell (4) to the solution tank (1), and the solution (3) which has been electrolyzed in the electrolytic cell (4) to have a reduced metal ion concentration. ) Is recycled to the melting tank (1) and reused to dissolve the waste metal. A device for producing high-purity metal from waste metal processing materials.