SU757607A1 - Electrolyte distributing device over cathode cells of electrolysis bath - Google Patents

Description

The invention relates to the technique of electrolytic refining of non-ferrous metals, such as nickel,

• in electrolysis baths with split-. anodic and cathodic spaces and, in particular, to devices for electrolyte distribution in the cathode bath cells.

A device is known for distributing electrolyte to cathode cells of an electrolysis bath, for example, for electrolytic refining of nickel, which contains a manifold with fittings connected to flexible tubes pubescent into cathode cells and a pipe for supplying electrolyte to the collector.

A disadvantage of the known device is the low accuracy of electrolyte metering over the cells and the presence of current leaks through the electrolyte supply lines.

The purpose of the invention is to improve the accuracy of dispensing electrolyte in 2 cells and to prevent current leaks through the electrolyte supply lines.

This is achieved by the fact that the known device is equipped with valves to turn off the supply of electrolyte in

2

a collector, for connecting the collector to the atmosphere and for connecting the collector to an overpressure source, respectively, an electrolyte level relay in the collector and a valve control unit, the collector is provided with transverse, not reaching the top, partitions located between fittings and dividing the collector into sections of the same volume, output The electrolyte level switch is connected to the input of the control unit, and the control outputs are connected to the valves. Partitions, except the first from the side of the pipe for supplying electrolyte, are made of the same height, and the first partition is made higher than the rest.

FIG. 1 is a schematic diagram of the device, in FIG. 2, a diagram of the installation of the collector on the electrolysis bath.

The device contains a collector 1, vertical partitions 2, forming sections, receiving tubes 3, pressure pipe 4, shut-off valve 5, valve 6 for electrolyte shut-off, valves 7 and 8, connecting the collector 1 with the atmosphere and source of heat flow 3

757607

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pressure, respectively, relay level 9, control unit 10, fitting 11, flexible rubber tube 12,

(see Fig. 2), the cathode cell 13, the cathode 14 "

The device works as follows.

The initial state; manifold 1 is emptied, valves 6 and 8 are closed, valve 7 is open.

After a predetermined time lasts, the control unit 10 opens the valve 6 and the electrolyte enters the collector 1. By pouring through the partitions 2, the electrolyte fills in the collector section 1 sequentially one after the other. When the last section is filled, the electrolyte acts on the sensitive element of the level 9 relay ( , electrical contact) and the control unit 10 closes the valve 6.

After some time, sufficient for the electrolyte level to be aligned along the entire length of the collector 1, the control unit 10 closes the valve 7 and opens the valve 8, informing the collector 1 with the overpressure line. Under the action of pressure, the electrolyte flows through the feed tubes 12 (Fig. 2) into the cathode cells 13, and each cell receives the same amount of electrolyte, limited by the size of the section,

The magnitude of the overpressure P _p air must be sufficient for the electrolyte from the collector 1 to enter the supply tube 12, then the elec- tric. Rolling will flow under the action of both pressure and level differences in the collector 1 and the cathode cell 13 ”The immersion depth H of the supply tube 12 (FIG. 2) must be such that it prevents air from escaping from the tube 12 after the section has been emptied or the air has come out was minimal, i.e. P _p % 'd b (¢ - beats. Weight of the electrolyte).

The flow section, fittings 11 and tubes 3 and 12 are chosen from such a calculation that emptying the collector sections takes place in the shortest possible time - with the short-term pulses disturbing the cathode cell 13 and destroying the cathode electrolyte layer depleted in nickel ^ and the jet gap in the pauses between Pulsed prevents leakage current.

The control of the valves is carried out by the control unit 10 according to the time sequence diagram. The duration of the cycle, i.e. pulse frequency, determines the electrolyte consumption per cell "

The device solves the problem of eliminating leakage of current through the circuit formed by the electrolyte; when filling.

electrolyte collector 1 circuit is broken, because in the upper part of the tubes 12 there is no electrolyte, when the electrolyte is supplied to cells 13, the circuit is broken by the first and subsequent septum. mi 2 collectors 1.

⁵ The device provides a uniform distribution of the catapite over the bath cells in combination with its pulsed feed, which stabilizes the electrolytic gel and allows Intex ¹⁰ 'to mill the process due to some mixing of the catholyte in the cell, reducing labor costs by eliminating the choke cleaning operation? is it possible to control the flow of electrolyte per bath depending on its condition (number of cathodes in the bath, lifetime of anodes, etc.)? elimination of current leaks due to the break of the electric circuit through the elec

20 rolls

Claims (2)

Claim 25 1. Device for distribution electrolyte in the cathode cells of the electrolysis bath, for example, for electrolytic refining of nickel, containing a manifold with chokes. connected to flexible tubes lowered into cathode cells and a pipe for supplying electrolyte to the collector, characterized in that, in order to improve the accuracy of catholyte dosing through cells and prevent current leakage through electrolyte supply lines, a collector, for connecting the collector to the atmosphere and for connecting the collector to the overpressure source, respectively, an electrolyte level relay in the collector and a valve control unit, the collector is provided with a cross, not reaching the top, 55 partitions located between fittings and dividing the collector into sections of the same volume, the output of the level switch is connected to the input of the control unit, and the output of the control unit 30 with valves, 2, The device according to claim 1, characterized in that the partitions, except for the first from the side of the pipe for supplying electrolyte, are made of the same height, and the first partition is made higher than the rest.