JPH0741982A - Metal electrorefining cathode box - Google Patents

Abstract

PURPOSE:To prevent a short circuit caused by coming a cathode plate into contact with a filter cloth by forming a frame body with a horizontal lower frame having a V-shaped section, a couple of vertical frames and a couple of horizontal filter cloth hanging rods for inserting the cathode plate and fixing a bag filter cloth to the frame body. CONSTITUTION:A frame body into which a cathode plate is inserted from above is formed with a horizontal lower frame forming the the bottom face and having a V-shaped section, left and right vertical frames 5 and 5' rising vertically from both ends of the lower frame and having a V-shaped section and two horizontal filter cloth hanging rods 6 and 6' provided longitudinally to link the frames 5 and 5' in the vicinity of the upper ends of the frames 5 and 5'. Clip-on filter cloth fixtures 7 and 7' are provided respectively to the rods 6 and 6', and the bag filter cloth 2 is mounted and fixed by the fixtures when the frame body is inserted into the filter cloth 2 to form a cathode box 1. Meanwhile, a positioning flange 8 is projected in the vicinity of the upper ends of the frames 5 and 5', and the cathode box 1 is positioned by the flange 8 and a pin 8' when the box is inserted into the electrolytic cell.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode box provided for partitioning an electrolytic solution near a cathode plate in an electrolytic cell from an electrolytic solution on an anode side in aqueous metal electrolysis.

[0002]

2. Description of the Related Art In electrolytic refining of metals such as nickel, cobalt and copper, it is well known that a thin seed plate made of SS, SUS, Ti or the like as a mother plate is used as a cathode plate in an electrolytic cell. The cathode plate, the anode plate, and the anode diaphragm (hereinafter referred to as the anode plate) are alternately arranged on the cathode plate, and electrolytic metal is electrodeposited on the cathode plate for refining.

In the electrolytic refining of such a metal, for example, in the case of performing nickel's chibinet electrolysis or producing sulfur-containing electric nickel, other impurities in the electrolytic solution and chlorine gas generated by the electrolysis are in the vicinity of the cathode. As shown in FIG. 3, a frame-shaped cathode box in which a cathode plate is housed inside, an opening is provided in a surface facing the surface of the housed cathode plate, and a filter cloth is attached to the opening surface, as shown in FIG. Is used. The cathode box is usually made of wood or FRP, and the filter cloth is attached to the frame of the cathode box with an adhesive.

[0004]

However, in such a cathode box, when refilling the filter cloth, the adhesive partially remains on the frame surface and must be removed by polishing, which is troublesome. Not only does it take
There is a drawback that the frame surface is damaged and the life of the cathode box is shortened.

In the electrolytic refining of such a metal,
Since the cathode plate used is extremely thin, distortion occurs due to the stress of the electrodeposit on the cathode plate during electrolytic operation, but when using the cathode box with the above-mentioned shape, distortion may occur in the cathode plate. Another problem is that the cathode plate and the filter cloth come into contact with each other to cause a short circuit and the filter cloth is broken.

The present invention has been made in view of the above problems, and provides a cathode box having a shape such that the filter cloth can be easily replaced and a short circuit with the filter cloth due to the distortion of the cathode plate is unlikely to occur. That is the purpose.

[0007]

According to the present invention for solving the above-mentioned problems, a horizontal frame having a V-shaped cross section and left and right vertical frames having a V-shaped cross section which stand upright vertically from both ends of the lower frame, and Two horizontal filter cloth suspensions provided at the front and rear near the upper ends of the left and right vertical frames so that the vertical frames are connected to each other with a space for inserting a cathode plate between the left and right vertical frames. A frame body composed of a rod, and a bag-shaped filter cloth body that substantially wraps the frame body along the outer surface of the frame body except the upper surface thereof, and the upper end of the bag-shaped filter cloth body is attached to the filter cloth suspension rod. It is a cathode box for metal electrorefining which is fixed by a provided clip-shaped fixing jig.

[0008]

In the cathode box of the present invention, the lower frame and the vertical frame of the frame body are formed in a V-shaped cross section as described above. Therefore, by inserting the cathode plate deep into the bottom of the V-shaped frame. Even if the cathode plate is distorted during electrolytic refining of metal, the edge of the cathode plate hits against the slope of the V-shaped frame and is restrained at a stage where the strain is still small, preventing further strain from progressing. can do. Therefore, as a result,
Since the cathode plate does not come into contact with the bag-shaped filter cloth provided along the outer surface of the frame, there is no risk of causing a short circuit. Further, in the present invention, since the bag-shaped filter cloth is fixed to the filter cloth suspension rod by the clip-type fixing jig, the bag-shaped filter cloth is very easily attached and detached when the bag-shaped filter cloth is replaced, and an adhesive is used. Since it is not used, there is no need to perform troublesome work such as polishing of the cathode box frame, and the problem of causing damage to the frame due to this can be solved, so the durability of the cathode box can be further improved. it can.

Further, by using a frame body having a V-shaped cross section, the material used can be reduced and the weight can be reduced as compared with the conventional box type cathode box, so that it can be electrolytically refined. The work of inserting the cathode into the electrolytic cell becomes easy.

[0010]

The preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a cathode box for metal electrorefining according to the present invention, and FIG. 2 is a perspective view showing a frame body portion from which the bag-shaped filter cloth body is removed in FIG.

In the figure, 1 is a cathode box, and 2 is a bag-like filter cloth. Further, 3 is a frame body, and the frame body 3 is a horizontal lower frame 4 having a V-shaped cross section which forms a bottom surface, and left and right vertical frames 5 having a V-shaped cross section which are vertically raised from both ends of the lower frame 4. ,
5'and in the vicinity of the upper ends of the vertical frames 5, 5 ', two horizontal filter cloth suspension rods 6, 6'arranged forward and backward so as to connect the vertical frames 5, 5', Each frame 4, 5,
The cathode plate (not shown) is formed in the internal space formed by 5'and the filter cloth suspension rods 6, 6'from above the frame. Reference numerals 7 and 7 ′ are clip-type filter cloth fixing jigs, which are provided on the filter cloth suspension rods 6 and 6 ′, for mounting and fixing the bag-shaped filter cloth body 2. Further, 8 is a vertical frame 5 for fixing the cathode box to the electrolytic cell,
5'is a flange projecting outward from the vicinity of the upper end portion, and a positioning pin 8'is provided on the lower surface of the flange. It should be noted that if the pin 8'is provided on at least one of the flanges, its function is sufficiently exhibited.

When the bag-shaped filter cloth 2 is mounted, the bag-shaped filter cloth 2 is covered from below and the upper end of the bag-shaped filter cloth 2 is folded so that the bag-shaped filter cloth is wrapped around the filter cloth suspension rods 6 and 6 '. The bag-like filter cloth body 2 can be fixed to the frame body 3 by covering the fixing jigs 7 and 7 ′ from above. Next, the cathode plate is inserted into the bag-like filter cloth 2, the entire cathode box 1 is loaded into the electrolytic cell, the flange 8 is hooked on the electrolytic cell, and the pin 8'is positioned to complete the preparation for electrolytic refining. To do.

According to the experiment, the V-shape of the frame cross section is V-shaped.
The angle between the frame surface and the inserted cathode plate surface is 10-8.
It is good to form it at 0 °, preferably 30 to 50 °. Further, as the constituent material of the cathode box frame 3, it is suitable to use an electric insulating material such as FRP or vinyl chloride. More preferably, the use of heat-resistant vinyl chloride is economical because of low production cost.

As a specific example, 800 mm × 100
When electrolytically refining nickel using a cathode box using a 0 mm × 1.5 mm cathode plate, the cathode box (880 mm × 1100 mm × 50 mm) according to the present invention shown in FIG. 1 and FIG. The weight of the cathode box, the production cost, the durability, the filter cloth replacement labor, the cathode plate in operation, when it was made with vinyl and the cathode plate with the above dimensions was inserted into this The rate of occurrence of short circuit due to contact with the filter cloth is shown in comparison with the case of using the conventional FRP cathode box shown in FIG. 3 using the same cathode plate. In addition, other operating conditions etc. were performed according to the usual method.

Device of the present invention Conventional device (heat-resistant vinyl chloride) (FRP) Weight 2 kg / piece 5 kg / piece Creation price 7,000 yen / piece 50,000 yen / piece Durability Semi-permanent 5-6 years Filter cloth replacement wage 1,000 Yen / time 2,000 yen / time (frame material polishing cost) Short incidence 0.5% 3% As can be seen from the above comparison, the cathode box of the present invention is superior in all items to the conventional one. ing.

[0017]

As described above, according to the cathode box of the present invention, it is possible to minimize the distortion of the cathode plate that occurs during metal electrolytic refining, and to prevent a short circuit due to the contact of the cathode plate with the filter cloth. In addition to being able to prevent it, the filter cloth can be easily attached and removed when the filter cloth is replaced, and it does not require polishing work of the frame material when replacing the filter cloth, which is conventionally performed, and is excellent in durability. Not only is it lightweight, it is also inexpensive and can be manufactured at great cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a preferred embodiment of a cathode box of the present invention.

FIG. 2 is a perspective view of the frame body from which the bag-shaped filter cloth body is removed in FIG.

FIG. 3 is a perspective view showing a conventional cathode box.

[Explanation of symbols]

 1 Cathode Box 2 Bag-shaped Filter Cloth 3 Frame 4 Bottom Frame 5 Vertical Frame 6,6 'Filter Cloth Hanging Rod 7, 7'Clip-shaped Mounting Jig 8 Flange 8'Positioning Pin

Claims (1)

[Claims] 1. A horizontal lower frame having a V-shaped cross section, and left and right vertical frames having a V-shaped cross section that rises vertically from both ends of the lower frame,
Also, two horizontal filters are provided in the front and rear portions near the upper ends of the left and right vertical frames so that both vertical frames are connected to each other with a space for inserting a cathode plate between the left and right vertical frames. A frame body composed of a cloth hanging rod; and a bag-shaped filter cloth body having a shape that substantially encloses the entire frame body along the outer surface of the frame body except the upper surface thereof. A cathode box for metal electrolytic refining, which is fixed by a clip-shaped fixing jig provided on a filter cloth suspension rod.