JP3219188B2 - Method for cleaning a conductive rod and equipment for cleaning the conductive rod for implementing the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cleaning a conductive rod for avoiding a decrease in electrolysis efficiency due to poor conductivity of a conductive rod to be reused, and a cleaning apparatus for the conductive rod for implementing the method.

[0002]

2. Description of the Related Art Electrolysis refers to a process in which an ionic conductor such as an aqueous solution of an electrolyte or a molten salt is caused to undergo a chemical change through an electric current to separate and manufacture a substance. Metal refining using this electrolysis is called electrolytic refining.

An outline of a conventional electrolytic smelting facility will be described (see FIGS. 4 and 5). The electrolytic cell 50 has a rectangular parallelepiped shape opened upward and has a common conductor 5 on the upper surface of the long side wall 50a.
2 (Bus bar) is installed. As shown best in FIG. 4, a plurality of electrolyzers 50 are installed adjacent to each other in the vertical and horizontal directions, and the total number thereof is several hundred. In the electrolytic solution of each electrolytic cell 50, a plurality (typically, about 20 to 50 sheets of cathode) of a cathode seed plate (cathode plate) K and a type with an anode lug (anode plate) A are alternately parallel to each other. Is soaked.

Each cathode plate K is suspended from a conductive rod 54 (crossbar) via a ribbon 56. Both ends of the cross bar 54 and the ear A1 of the anode plate A are connected to the common conductor 52 provided on the insulated upper surface of one of the left and right electrolytic cell long side walls 50a and the other electrolytic cell long side wall 50a.
Each is supported.

In the Walker-type current supply system shown in FIG. 4, a total of four electrolytic cells 50, two in length and two in horizontal direction, form a set so that current flows from all anode plates A to all cathode plates K of each electrolytic cell 50. It is wired to. As a power source for electrolytic smelting, a low voltage, a large current is required, and a large capacity voltage can be adjusted according to the conditions of the electrolytic operation while having a large capacity, so a thyristor type or diode type semiconductor rectifier is used. Can be

[0006]

In order to continue the normal operation of electrolytic refining, it is premised that contact failure of a current-carrying portion that mechanically contacts does not occur. The common conductor 52 serves as a support member for suspending the cathode plate K and the anode plate A in the electrolytic cell, and the right anode plate from the cathode plate K immersed in the electrolytic cell 50 on the left side (see FIG. 4). It plays two roles as a conductor flowing through A. At the start of the operation, the cathode seed plate suspended on the crossbar 54 is in a light state because the target metal is not deposited. Therefore, the portion of the common conductor 52 that supports the cathode seed plate contacts only a small load. So, crossbar 5
4 and the common conductor 52 were likely to have poor contact. Similarly, the cathode seed plate is suspended and supported by the crossbar 54 via a pair of ribbons 56, but the two parts that are actually in contact are mainly the upper two corners of the crossbar 54. As described above, since the contact is made only in a narrow range, there is a disadvantage that poor contact easily occurs between the back side of the ribbon 56 and the crossbar 54.

[0007] The decrease in the amount of electricity due to the poor contact is manifested in the form of a decrease in the amount of copper deposited on the cathode plate K. Therefore, when replacing the anode plate A and / or the cathode plate K, the common conductor of the cross bar 54 is replaced. It is conceivable that the portion supported by 52 and the portion in contact with ribbon 56 are manually polished. However, the cathode plate K does not
Approximately 50 tubes are used per unit. Further, since a large number of the electrolytic cells 50 are provided in the factory, the number of the crossbars 54 and the polished portions to be polished is enormous, and it is a reality that manual operations are not enough.

Further, a method of cleaning the entire crossbar 54 with a cleaning liquid before mounting the cathode seed plate when reusing the crossbar 54 can be considered, but this method requires a new cleaning facility. Further, a method of spraying an electrolytic solution or diluted sulfuric acid immediately before lifting the cathode plate K from the electrolytic cell is also conceivable. However, this method is insufficient in cleaning the portion of the conductive rod hitting the inside of the ribbon, resulting in poor conductivity. However, there is a disadvantage that the electrolysis efficiency is reduced due to the above. Also,
This method deteriorates the working environment due to generation of acid mist.

An object of the present invention is to continuously and automatically wash a predetermined position of a conductive rod to improve the electrolytic efficiency in order to avoid a decrease in electrolysis efficiency due to poor conductivity of the conductive rod to be reused. It is an object of the present invention to provide a cleaning method that can perform the cleaning and a cleaning facility for a conductive rod that performs the cleaning method.

[0010]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems is a method of cleaning a conductive rod for suspending and supporting a cathode plate obtained by electrolytic refining via a ribbon. The cathode rod is transported in the transport path while supporting the conductive rod of the cathode plate by a pair of endless track means, and the raised part formed by raising the bottom partway along the transport path is the cathode plate.
When passing through, the lower end of the cathode plate is lifted to form a gap between the ribbon and the conductive rod, and a cleaning liquid is sprayed toward the gap to thereby form a portion of the conductive rod corresponding to the inside of the ribbon. Provided is a method for cleaning a conductive rod for cleaning a rod.

The lower end of the cathode plate K is located at the bottom of the conveyance path.
Raise the raised portion to form a gap between the ribbon and the conductive rod, and spray the cleaning liquid toward this gap, so that the portion of the conductive rod corresponding to the inside of the ribbon is clean. In addition, cleaning can be reliably performed. Pair of
Casor moving while suspended by endless track means
When the cathode plate K passes through the raised portion, the lower end of the cathode plate K
And thereby a gap can be reliably formed between the ribbon and the conductive rod.

[0012] The invention according to claim 2 is a method for producing an electro-refined steel sheet by electrolytic refining.
The obtained cathode plate is suspended and supported via a ribbon.
A method for cleaning a conductive rod, comprising a pump lifted from an electrolytic cell.
While supporting the conductive rod of the sword plate with a pair of endless track means
From the transport path,
Lift the bottom edge of the plate to create a gap between the ribbon and the conductive rod.
And then, toward this gap, electrolytic copper refining
Sulfuric acid, which is a consumable component of the electrolyte solution, as a cleaning solution
The part of the conductive rod corresponding to the inside of the ribbon
In addition to washing, the washing solution used for washing is injected into the electrolytic cell as a replenishing solution.

[0013] In order to wash the conductive rod with an acid, a solid metal salt such as copper sulfate adhered to the conductive rod is dissolved by electrolytic refining and the polishing debris is washed to form a surface having more excellent conductivity. At the same time, by returning this liquid to the electrolytic cell, the liquid composition in the electrolytic cell can be adjusted at the same time. On this occasion,
When the cleaning liquid is sprayed at a high pressure, the attached solid metal salt, polishing dust and the like can be blown off at the liquid pressure, and the cleaning effect is further improved.

[0014]

[0015]

The third aspect of the present invention is the first or second aspect.
In the method for cleaning a conductive rod according to the above, when a gap is formed between the ribbon and the conductive rod, the cleaning liquid is sprayed toward the gap from a total of three places above and on the left and right of the gap. The portion of the conductive rod corresponding to the inside of the inside is washed.

By spraying the cleaning liquid from a total of three locations above the gap and on the left and right, the portion of the conductive rod corresponding to the inside of the ribbon is thoroughly washed without fail.

According to a fourth aspect of the present invention, there is provided the method for cleaning a conductive rod according to any one of the first to third aspects, except that the conductive rod is supported by a common conductor of an electrolytic refining facility. Transported while being supported by a pair of endless track means at
A cleaning method for a conductive rod, wherein the cleaning is performed by spraying a cleaning liquid onto a portion supported by a common conductor.

The part supported by the common conductor, which is a part that causes poor conductivity, is also cleaned by spraying a cleaning liquid.

A second aspect of the present invention is a cleaning equipment for a conductive rod for suspending and supporting a cathode plate obtained by electrolytic refining via a ribbon, and has a substantially rectangular cross section and a transport path which is continuous in the longitudinal direction. And a pair of endless track means extending in the longitudinal direction near the upper portion of the transport path, each of which can transport at a predetermined interval a conductive rod in which one cathode plate is suspended via a pair of ribbons. Endless track means, formed at the bottom of the transfer path at a predetermined position with the bottom raised, and lifting the lower end of the cathode plate moving upward to form a gap between the ribbon and the conductive rod. Lifting portion, and a spray nozzle arranged at a position above the lifting portion, wherein the cleaning liquid is supplied to the gap between the ribbon and the conductive rod formed by lifting the lower end of the cathode plate by the lifting portion. No. which can be injected Provide cleaning equipment for conduction rod made is configured to include an injection nozzle, a.

According to a sixth aspect of the present invention, in the cleaning equipment for a conductive rod according to the fifth aspect , the cleaning solution is sulfuric acid, which is a consumable component of the electrolytic solution in electrolytic refining of copper, and is used for cleaning. The washing liquid is collected in a collection tank through the bottom of the transport path, and then injected into the electrolytic cell as a replenishing liquid.

The invention according to claim 7 is the invention according to claim 5 or 6.
In the cleaning equipment for a conductive rod according to the above, when a gap is formed between the ribbon and the conductive rod, the first injection nozzle applies the cleaning liquid toward the gap from a total of three places above the gap and on the left and right. A pair is provided on both sides of the ribbon so that the ribbon can be ejected.

According to an eighth aspect of the present invention, in the cleaning equipment of the conductive rod according to the seventh aspect , the pair of endless track means is other than a part supported by a common conductor of the electrolytic refining equipment of the conductive rod. And a second spray nozzle capable of spraying the cleaning liquid to a portion supported by such a common conductor.

According to a ninth aspect of the present invention, in the cleaning equipment for a conductive rod according to the seventh aspect , a common pipe supplied from the common storage tank to the first and second injection nozzles via a high-pressure pump. Is further provided.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for cleaning a conductive rod according to the present invention and an electrolytic refining facility for performing the method will be described in detail based on the illustrated preferred embodiments.

FIG. 1 is a perspective view schematically showing an embodiment of a cleaning device for a conductive rod according to the present invention, FIG. 2 is a schematic front view thereof, and FIGS. FIG. 4 is a schematic perspective view of a main part showing one embodiment of a lifting portion provided at the bottom of the transport path of the cleaning equipment.

The conductive rod cleaning equipment 10 according to the present invention comprises:
Schematically, a transport path 12 having a substantially rectangular cross section and continuing in the longitudinal direction, a pair of endless track means 14 extending in the longitudinal direction near the upper part of the transport path 12, and a lifting part provided at a predetermined position at the bottom of the transport path 12 16, and first and second injection nozzles 18 and 20 arranged above the lifting section 16.

The cathode plate K obtained by electrolytic refining is
Each is suspended and supported by a conductive rod 4 via a ribbon 2. The number of cathode plates K obtained by electrolytic refining in one electrolytic cell is usually 20 to 60. These cathode plates K are moved from the electrolytic cell to one end of the transport path 12 by an overhead horizontal moving mechanism such as an overhead crane, and are supported on both side walls of the transport path 12. This transport path 12
A cathode plate cleaning device 6 is provided on the downstream side as shown in FIG. In the cathode plate cleaning device 6, cleaning water is sprayed from a water spray to wash away the electrolyte adhering to the surface.

Both ends of the conductive rod 4 on which each cathode plate K is suspended are mounted on a pair of endless track means 14 which moves in the longitudinal direction in the upper part in the transport path 12. As the endless track means 14, for example, a chain conveyor can be used, and in the illustrated preferred embodiment, a projection 14a is provided on the upper surface thereof. The end of each conductive rod 4 is transported while being hooked on the projection 14a. Therefore, the cathode plate K is transported in the transport path 12 at an interval equal to the interval between the projections 14a.

The lifting section 16 raises the lower end of the cathode plate K that moves above to form a gap between the ribbon 2 and the conductive rod 4. The lifting section 16 may be configured such that the bottom surface of the transport path 12 is raised in a triangular shape as shown in FIG. 3A to form a slope 16a, or as shown in FIG. Of rollers 16b. The slope 16a is the elevating part 16 which can be installed most easily, and can be provided at low cost. In order to improve the slip at the lower end of the cathode plate K, a slip promoting plate 16c as shown in FIG. 1 can be provided. When a large number of rollers 16b are arranged in a triangular shape, the lower end of the cathode plate K moves smoothly, and
When moving to b, the cathode plate K vibrates up and down. Thereby, the gap formed between the ribbon 2 and the conductive rod 4 changes every moment, so that the cleaning liquid can be supplied to all parts of the conductive rod 4.

As described above, the gap between the ribbon 2 and the conductive rod 4 is formed by lifting the lower end of the cathode plate K, and the cleaning liquid is jetted toward this gap. This has the advantage that the part of the rod 4 can be cleaned cleanly and reliably. Such cleaning can be easily achieved only by lifting the lower end of the cathode plate K, and the manufacturing cost can be minimized.

The first spray nozzles 18 are preferably arranged so that they can be sprayed from a total of three locations above and to the left and right of the gap formed between the ribbon 2 and the conductive rod 4. By spraying the cleaning liquid from a total of three places above and on the left and right of the gap, there is an effect that the part of the conductive rod 4 corresponding to the inside of the ribbon 2 can be completely and reliably cleaned.

In the illustrated preferred embodiment, a pair of endless track means 14 are arranged to transport while supporting portions of the conductive rod 4 other than those supported by the common conductor of the electrolytic refining facility. . And the second injection nozzle 20
Are arranged so as to spray the cleaning liquid to a portion of the conductive rod 4 supported by the common conductor. Therefore,
The portion of the conductive rod 4 supported by the common conductor, which is a portion that causes poor conductivity, is also reliably cleaned by spraying the cleaning liquid.

The cleaning liquid is preferably a liquid having the same components as the electrolytic solution stored in the electrolytic cell.
For example, sulfuric acid is used in electrolytic refining of copper, and sulfuric acid is consumed by electrolytic refining. Therefore, there is an advantage that sulfuric acid, which is a cleaning liquid used for cleaning, is collected in the recovery tank 8 through the bottom of the transport path 12 and then injected into the electrolytic cell as a replenishing liquid. That is, the adjustment of the liquid composition in the electrolytic cell can be performed simultaneously. In addition, since the conductive rod 4 is washed with an acid, there is also an advantage that copper sulfate, a metal salt or the like adhering to the conductive rod 4 can be dissolved by electrolytic refining to form a more conductive surface. Have.

The common liquid storage tank 7 is connected to the first and second injection nozzles 18 through the high-pressure pump 9 and the common pipe 9a.
20 is supplied with a cleaning liquid at high pressure. By doing this,
The cleaning liquid is sprayed at a high pressure to blow off the solid metal salt, polishing debris, and the like adhering to the conductive rod 4 with the liquid pressure, thereby further improving the cleaning effect.

Next, a method for cleaning the conductive rod according to the present invention will be described by taking copper refining as an example. A plurality of cathode plates K obtained by the electrolytic refining are placed in a horizontal

The transfer mechanism moves from the electrolytic cell to one end of the transport path 12 and is supported on both side walls of the transport path 12.

The pair of endless track means 14 is operated, and the conductive rods 4 suspending the cathode plate K are mounted one by one on the projections 14a by a moving mechanism (not shown). As a result, the conductive rods 4 of each cathode plate K move at predetermined intervals while being supported at both ends by the pair of endless track means 14. Note that the pair of endless track means 14 is arranged so as to transport while supporting portions other than the portions supported by the common conductor of the electrolytic refining facility of the conductive rod 4.

When the cathode plate K reaches the position of the lifting portion 16 provided at the bottom of the transport path 12, the lower end of the cathode plate K starts to contact the lifting portion 16 and rises along the surface of the lifting portion 16. Go. Thereby, the ribbon 2 and the conductive rod 4
Is formed between them. The high-pressure pump 9 is operated to supply the cleaning liquid at a high pressure from the liquid storage tank 7 to the first and second injection nozzles 18 and 20 via the common pipe 9a. The first spray nozzle 18 injects the cleaning liquid toward a gap formed between the ribbon 2 and the conductive rod 4, thereby forming a portion of the conductive rod 4 corresponding to the inside of the ribbon 2, The two injection nozzles 20 reliably clean the portion supported by the common conductor of the conductive rod 4. By spraying such a cleaning liquid, it is possible to simultaneously and reliably clean two portions that are likely to cause poor conductivity, and it is possible to almost completely avoid a decrease in electrolysis efficiency due to poor conductivity. Specifically, a sufficient effect was obtained by injecting 80 g / liter sulfuric acid in a total of 7.5 liter / minute. The better effect when injected similarly with de A _S solution after the electrolyte (400 g / l) was obtained.

[0040]

According to the method of cleaning a conductive rod according to the present invention, the conductive rod of the cathode plate K pulled up from the electrolytic cell is transported in the transport path while being supported by a pair of endless track means. The upper part formed by raising the bottom part of the way is the cathode
When the plate passes, a lower end of the cathode plate K is lifted to form a gap between the ribbon and the conductive rod, and a cleaning liquid is sprayed toward the gap to thereby form a conductive rod corresponding to the inside of the ribbon. This has the effect that the portion of the conductive rod corresponding to the inside of the ribbon can be cleaned cleanly and reliably.

Further, the holding portion formed by raising the bottom portion is
Only by passing the cathode plate K, the cathode plate K can be easily lifted, so that a gap can be reliably formed between the ribbon and the conductive rod. Also have.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment of a cleaning facility for a conductive rod according to the present invention.

FIG. 2 is a schematic front view of the cleaning equipment for a conductive rod shown in FIG.

FIGS. 3 (a) and 3 (b) are schematic perspective views of essential parts showing one embodiment of a lifting part provided at the bottom of a transport path of a cleaning facility.

FIG. 4 is a schematic plan view for explaining a power supply method to an electrolytic cell in a Walker type current supply system.

FIG. 5 is a perspective view of a power supply unit to an anode plate A and a cathode plate K in the conventional electrolytic smelting.

[Explanation of symbols]

 2 Ribbon 4 Conducting rod 6 Cathode plate cleaning device 7 Liquid storage tank 8 Recovery tank 9 High pressure pump 9a Common piping 10 Cleaning equipment 12 Conveying path 14 Endless track means 14a Projection 16 Holding upper part 18, 20 Injection nozzle

Claims (9)

(57) [Claims] 1. A method of cleaning a conductive rod for suspending and supporting a cathode plate obtained by electrolytic refining via a ribbon, wherein the conductive rod of the cathode plate pulled up from an electrolytic tank is moved by a pair of endless track means. It transports inside the transport path while supporting it, and the raised part formed by raising the bottom part of the
When the plate passes, a lower end of the cathode plate is lifted to form a gap between the ribbon and the conductive rod, and a cleaning liquid is sprayed toward the gap to form a conductive rod corresponding to the inside of the ribbon. A method of cleaning a conductive rod for cleaning a site. 2. A cathode plate obtained by electrolytic refining
A method for cleaning a conductive rod suspended and supported via a bon.
Therefore, the conductive rod of the cathode plate pulled up from the electrolytic cell is
Transported in the transport path while being supported by the limited track means.
Lift the lower end of the cathode plate in the middle of the road and
And a gap between the conductive rod and
Phase inside the ribbon by the sulfuric acid which is a consumable component of the electrolyte solution in the electrolytic refining of copper towards injecting a washing liquid
A method for cleaning a conductive rod, comprising cleaning a corresponding portion of the conductive rod and pouring a cleaning solution used for cleaning as a replenishing solution into an electrolytic cell. 3. The method for cleaning a conductive rod according to claim 1 , wherein a gap is formed between the ribbon and the conductive rod.
Washing from above and right and left in total 3 places toward this gap
By spraying liquid, it is equivalent to conductive inside the ribbon
A method for cleaning a conductive rod, comprising cleaning a part of the rod. 4. The method for cleaning a conductive rod according to claim 1, wherein the conductive rod is supported by a common conductor of an electrolytic refining facility.
Conveyed while supported by a pair of endless track means at locations other than
And spray the cleaning liquid onto the parts supported by the common conductor.
A method of cleaning a conductive rod. 5. The method according to claim 1, wherein the cathode plate obtained by the electrolytic refining is re-used.
Cleaning equipment for conductive rods suspended and supported via
I, section and conveyance path continuous longitudinally substantially rectangular, a pair of endless trajectories extending near the top of the transport path in a longitudinal direction
A road section, a pair of re a single cathode plate respectively is
Conductive rods suspended via bon can be transported at predetermined intervals
A pair of endless track means, and a bottom formed at a predetermined position at the bottom of the conveyance path.
Lift the lower end of the cathode plate
A lifting part that forms a gap between the ribbon and the conductive rod;
And the spray nozzle disposed above the lifting part.
Then, the lower end of the cathode plate is lifted by the holding portion.
Between the conductive rod and the ribbon formed by
A first injection nozzle capable of injecting the cleaning liquid therebetween.
Cleaning equipment for conductive rods formed. 6. The cleaning equipment for a conductive rod according to claim 5, wherein
Oite, the cleaning solution is depleted component of the electrolyte solution in the electrolytic refining of copper
The cleaning liquid used for cleaning is
It is collected in the collection tank through the bottom, and then the electrolytic cell
Washing of conductive rods, characterized by being injected as a replenishing solution into the body
Purification equipment. 7. The cleaning of the conductive rod according to claim 5 or 6.
In the equipment, the first injection nozzle has a gap between the ribbon and the conductive rod.
Is formed, from a total of three places above and on the left and right of the gap
Cleaning liquid can be sprayed toward this gap
And a pair provided on both sides of the ribbon.
Cleaning equipment for conductive rods. 8. A cleaning facility for a conductive rod according to claim 7.
The pair of endless track means is provided with an electrolytic refining device for the conductive rod.
While supporting parts other than those supported by the common conductor
To be transported from
The cleaning liquid can be sprayed on the part supported by the conductor.
A second injection nozzle is further provided.
Cleaning equipment for conductive rods. 9. The cleaning equipment for a conductive rod according to claim 7, wherein
In the first and the second through a high pressure pump from a common storage tank
A common pipe for supplying to the second injection nozzle is further provided.
Cleaning equipment for conductive rods.