JP3074919B2 - Cathode scraper driving device in electrolytic cell - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic cell used for electrolytic refining of metal, for example, silver, and more particularly to a driving device for a cathode scraper used in this electrolytic cell.

[0002]

2. Description of the Related Art An example of an electrolytic cell conventionally used for electrolytic refining of silver will be described with reference to FIG. This electrolyzer is
An electrolytic cell main body 2 filled with an electrolytic solution 1, a frame 3 attached outside the open end of the main body 2 along the open end, an anode beam 4 mounted on an upper surface of the frame 3, and A cathode beam (not shown) and an anode beam 4 suspended inside the electrolytic cell body 2;
An anode 5 made of a gold-silver alloy and a stainless steel thin plate-shaped cathode suspended in the electrolytic cell main body 2 via a cathode beam in substantially the same manner as this and arranged alternately with the anode (Not shown), and disposed on the upper part of the electrolytic cell main body 2 so as to cover the main body 2 and mounted on the rail 6 so that the width direction of the electrolytic cell main body 2 (horizontal direction in the figure) And a cathode scraper 8 suspended from the lower surface of the frame 7 and arranged at a position facing both surfaces of the cathode. The frame 3 is provided with electrodes, and is configured such that a voltage can be applied between the anode 5 and the cathode by bringing the cathode 5 into contact with the electrodes.

In such a conventional electrolytic cell, the frame 7 is reciprocated by driving a driving device (not shown) attached to the frame 7, and the cathode scraper is moved through the frame 7. 8 can be reciprocated along the surface of the cathode. Thus, silver deposited on the surface of the cathode by electrolysis is scraped off, and the electrolytic cell main body 2 is removed.
And the silver can be collected to obtain electrical silver. Such a silver electrolysis method is well known in the art.

In the above-mentioned electrolytic refining,
Since the anode 5 becomes thinner with the progress of the electrolysis operation, the anode beam 4 is gripped, the anode 5 is lifted and taken out, and a new anode 5 is stored inside the electrolytic cell body 2.

[0005] However, in the conventional electrolytic cell, the frame 7 for driving the cathode scraper 8 is disposed above the anode beam 4.
When exchanging the anode, the frame 7 and the cathode scraper 8 attached thereto must be lifted and removed from the main body 2 and the anode exchange operation must be performed in this state, which is very complicated and time-consuming. There was a problem. In particular, in silver electrolysis, an electrolyzer is used which is long in the direction perpendicular to the surface of the anode (the direction perpendicular to the paper surface in FIG. 9), and performs electrolysis in a state where a large number of anodes and cathodes are alternately housed. Therefore, the operation of removing the frame 7 and the scraper 8 is inevitably a troublesome operation.

Further, in the prior art, since the anode beam 4 and the cathode beam are arranged below the frame 7, the contact state between the anode beam 4 and the cathode beam and the electrode must be changed through the frame 7. There is also a problem that it is not possible to visually recognize and it is difficult to manage the contact between the beam and the electrode.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and makes it possible to easily replace an anode and to easily manage contacts between an electrode, an anode, and a cathode beam. It is an object to provide a cathode scraper in an electrolytic cell, which can

[0008]

A cathode scraper driving device according to the present invention has a frame body having an insertion hole through which an anode is inserted at a predetermined position of an electrolytic cell main body.
The frame was provided with a cathode scraper disposed at a position facing the surface of the cathode, and a drive mechanism for reciprocating the cathode scraper in a direction along the surface of the cathode via the frame.

[0009]

According to the cathode scraper driving device of the present invention, the driving mechanism allows the cathode scraper to reciprocate along the surface of the cathode through the frame, thereby scraping off the target metal deposited on the surface of the cathode. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cathode scraper in an electrolytic cell used for electrolytic refining of silver according to one embodiment of the present invention will be described with reference to FIGS.

The silver electrolytic cell of this embodiment has a substantially rectangular shape in a plan view and a substantially funnel shape in a sectional view, and has an electrolytic cell body 20 filled with an electrolytic solution 1 therein; A frame 30 having a U-shaped cross section disposed outside the upper end of the main body 20 along the longitudinal direction of the main body 20 (see FIG. 3).
A large number of anode beams 40 placed in parallel on top of the frame 30 at equal intervals, a large number of cathode beams 50 respectively arranged between the anode beams 40, An anode 41 suspended via a support 42 (see FIG. 5)
And a cathode 51 suspended by the cathode beam 50
(See FIG. 6) and an insertion hole 61 that is disposed inside the electrolytic cell main body 20 and above the liquid level of the electrolytic solution 1 and through which the anode 41 and the cathode 51 are inserted. , A substantially rectangular frame 60, and the frame 60
And a support rod 62 (see FIG. 3) which extends between the inner surfaces of the support rods and which is disposed in parallel between the cathode beam 50 and the anode beam 40.
A rectangular plate-shaped cathode scraper 80 (see FIGS. 3 and 8) suspended swingably through a connecting plate 81 and facing the surface of the cathode 51; At the top of both ends in the longitudinal direction,
A double rod air cylinder (drive mechanism) 90 (FIGS. 1 and 2) attached to the frame body 60 for reciprocating the cathode scraper 80 in the direction along the surface of the cathode 51 via the frame body 60; It is composed of

An electrode for applying a voltage between the anode and the cathode is attached to the frame 30 as in the prior art, and the anode beam 40 and the cathode beam 50 mounted on the frame 30 are selectively provided. Are in contact with these electrodes.

Two support members 42 attached to the anode beam 40 are attached at a distance from each other in the axial direction of the anode beam 40. The lower end of the support 42 is
It is formed in a hook shape, and can be engaged with an engaging portion 41a (FIG. 5) formed on the upper portion of the anode 41.

The frame body 60 is disposed inside the frame 30. As shown in FIGS. 5 and 6, the anode beam 40 and the cathode beam 50 are supported by the frame 30 above the frame body 60. It has become. That is, in the apparatus of the present embodiment, the anode beam 40 and the cathode beam 50 are arranged above the frame 60. In addition, at both ends in the longitudinal direction of the frame body 60, at positions on both sides of the air cylinder 90 of the two rods,
Two rectangular plate-like connecting plates 63 (see FIGS. 1 and 2) are protruded. The connecting plate 63 is fixed to each rod 91 of the air cylinder 90 of both rods described above, and transmits the movement of the rod 91 to the frame 60 to reciprocate the frame 60. is there. A rail 21 extending in the axial direction of the air cylinder 90 is fixed to an upper portion of the electrolytic cell main body 20 below the connecting plate 63 (see FIG. 7). On the other hand, a slider 64 running on the rail 21 is fixed to the lower surface of the connecting plate 63. Thus, the frame body 60 moves on the rail 21 and can move along the axial direction of the air cylinder 90, that is, along the surface direction of the anode 41.

The cathode scrapers 80 are made of stainless steel, and are attached to one support rod 62 three by three as shown in FIG. Each cathode scraper 80 is formed with a through-hole 82 penetrating in the thickness direction. This through hole 82 is formed in the cathode scraper 80.
Is formed in a long hole along the length direction.

Reference numeral 43 in FIG. 4 denotes an anode bag for storing the anode 41, and can collect slime rich in gold generated from the anode 41. The anode bag 43 has a substantially U-shaped frame 44 fixed to the anode beam 40 (FIG. 5).
Are supported in a substantially square shape.

Next, the operation of the apparatus having the above configuration according to this embodiment will be described. During the electrolysis operation, a voltage can be applied between the anode 41 and the cathode 51 arranged as described above to perform electrolysis of silver. This is the same as the conventional device.

In the apparatus of the present embodiment, the air cylinder 90 is driven to reciprocate the frame body 60 at a constant cycle during the operation of electrolytic silver refining. Thus, the cathode scraper 80 attached to the frame body 60 can be reciprocated along the surface of the cathode 51, and the silver deposited on the surface of the cathode 51 can be scraped off.

When the electrolytic refining progresses and the anode 41 is thinned and replaced, the anode beam 40 and the cathode beam 51 are gripped by a crane and lifted upward to electrolyze the anode 41 and the cathode 51. It is taken out of the tank body 20 and replaced with a new anode 41 and a new cathode 51. At this time, in the device of the present example, since the anode beam 40 and the cathode beam 50 are exposed at the upper part of the frame 30, the anode beam 40 and the cathode beam 50 can be easily gripped, so that they can be easily replaced. There is an advantage that it becomes. That is, according to the apparatus of this example, the cathode scraper 80
Is disposed below the anode beam 40 and the cathode beam 50, so that there is an advantage that the gripping operation is not hindered by the frame 60 and is easy.

In the apparatus of this embodiment, the anode beam 4
Since the 0 and cathode beams 50 are exposed to the outside, the contact state between them and the electrodes of the frame 30 can be easily visually recognized from the outside, and there is also an advantage that the management of the contacts becomes easy.

Further, in the apparatus of this embodiment, since the insertion hole 61 is provided in the frame body 60, the anode 41 and the cathode 51 can be carried out to the outside through the insertion hole 61 and stored inside. Can be. Therefore, the frame 60
Without removing the anode 41 and the cathode 51
There is an advantage that the replacement work can be performed.

In this embodiment, an electrolytic cell used for electrolytic refining of silver has been described as an example, but the present invention is naturally applicable to electrolytic refining of other metals.

[0023]

The cathode scraper driving apparatus according to the present invention has a frame attached to a predetermined position of the electrolytic cell main body, a cathode scraper disposed at a position facing the surface of the cathode, A drive mechanism that reciprocates the cathode scraper through the body in the direction along the surface of the cathode is attached, making it easy to replace the anode and to easily manage the contact between the anode beam and the electrode. There is an effect that there is.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a cathode scraper driving device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of the cathode scraper driving device according to the embodiment of the present invention, showing a lower side from line XX of FIG. 1;

FIG. 3 is a partially cutaway view as viewed in the direction of arrow A in FIG. 1;

FIG. 4 is a partially omitted cross-sectional view along the line BB of FIG. 1;

FIG. 5 is a partially omitted cross-sectional view along the line CC of FIG. 4;

FIG. 6 is a partially omitted cross-sectional view along the line DD in FIG. 4;

FIG. 7 is an enlarged sectional view taken along line EE of FIG. 1;

FIG. 8 is an enlarged sectional view taken along line FF of FIG. 4, and is an explanatory view showing a configuration of a cathode scraper.

FIG. 9 is a sectional view of a conventional cathode scraper driving device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolyte 20 Electrolyzer main body 30 Frame 40 Anode beam 41 Anode 50 Cathode beam 51 Cathode 60 Frame 80 Cathode scraper 90 Air cylinder (drive mechanism)

Continuation of the front page (56) References JP-A-63-223194 (JP, A) JP-A-49-123306 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C25C 1 / 00-7/08

Claims (1)

(57) [Claims] An anode beam and a cathode beam are mounted on an upper portion of an electrolytic cell main body filled with an electrolytic solution. An anode and a cathode are suspended inside the electrolytic cell main body via these beams to perform electrolytic refining. In the electrolytic cell to be performed, the electrolytic cell body is provided with a frame having an insertion hole through which the anode is inserted, at a position below the anode beam and above a liquid level of the electrolytic solution, A cathode scraper disposed at a position facing the surface of the cathode and a drive mechanism for reciprocating the cathode scraper in a direction along the surface of the cathode via the frame are attached to the frame. A cathode scraper driving device in an electrolytic cell.