SU452105A3 - Apparatus for circulating electrolyte in electrolysis baths - Google Patents

Description

one

The invention relates to the field of electrochemical deposition of metals, in particular to devices for the circulation of electrolyte in electrolysis baths, for example, in the electrolytic refining of copper.

A device for circulating electrolyte in electrolysis baths, made of thermo - and corrosion-resistant electrically conductive material, contains pipes for supplying and discharging electrolyte located on the inner walls of the bath.

The proposed device differs from the known fact that the pipes are installed parallel to each other, are connected between themselves and are made with openings located in one straight line along the height of the pipes on the side opposite to the surface of the connecting pipes, with the upper opening in the electrolyte outlet pipe the form of a gap.

This makes it possible to obtain an electrolyte flow directed parallel to the surface of the electrodes.

FIG. 1 depicts electrolysis

a bath with a circulating electrolyte mounted on its end wall, top view in section; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one; in fig. 4 is a diagram of the electrolyte flow created by the proposed device in the electrolysis bath.

In the middle of the end walls 1 of each electrolysis cell of the unit for the electrolytic refining of copper, a device 2 made of plastic pipes is installed for supplying and discharging electrolyte. Both inlet 3 and outlet 4 respectively electrolyte tubes are open at the top.

Through the hole a in each of the tubes 3 for supplying electrolyte, the electrolyte enters the electrolysis bath somewhat higher than the lower edge of the cathode 5 in the direction of the left longitudinal wall 6 (view from each end wall) After passing through the space of the electrolysis bath located around the electrode group , and the intercodial space, the electrolyte flows in the direction of the right wall 6 (view from the corresponding end wall) of the electrolysis bath to the electrolyte outlet pipes 4 and flows out of the electrolysis bath through several arranged one above the other holes in the pipe used for discharging the electrolyte. The topmost hole in the electrolyte is in the form of a slit, its bottom edge is located below the very low electrolyte level. Below the spaced holes b for the electrolyte water are several levels of the lower edge of the cathode 5. Both the supply and removal of the electrolyte are carried out strictly parallel to both end walls 1 and the electrodes 7 located in the electrolysis bath. around the electrode group, it is stirred and circulated due to the selected location of the supply and discharge tubes in a clockwise direction, as shown in FIG. 4, both around the common electrode group and through separate interelectrode spaces. The supply and removal of electrolyte into electrolysis baths is carried out in a known manner, and this can be done using sheaves 8 for drainage electrolyte located on the end walls of the electrolysis baths. Both such boxes are connected to a partition 9, made with a slit-like vertically arranged hole, in which a box-shaped valve 10 is attached to the discharge pipe electrolyte 4, the electrolyte coming out of pipe 4 through which drain 11 comes out of the electrolyte 4 Further, the circulation is carried out in the usual way. Both connected devices 2 for the supply and removal of electrolyte provide the necessary uniform flow of electrolyte at the same level. The diameter of the holes in the electrolyte supply pipe is chosen such that it ensures the mixing of the electrolyte located between the common electrode group and the inner walls of the electrolysis cell, but that the anode gap located under the electrodes does not form a fluidized bed. The number and size of the holes in the electrolyte discharge pipe are chosen such that they ensure the most uniform circulation of the electrolyte through the total height of the electrodes. A device for circulating electrolyte may be located at various locations inside the electrolysis bath. These devices may be somewhat, but all the electrolyte tubes must be supplied with equal electrolyte batch per unit volume. Since the cathodes are usually made several times wider than the anodes, part of the circulating electrolyte flow enters the corresponding space between the electrons, and then goes back into the SdieKTOO JaTt circulator: electrolytic cells around the electrode, At the same time, the conditions for segmentation of anodic sludge in electric baths are not deteriorated. Making the uppermost hole in the electrolyte discharge pipe in the form of a slit ensures that when the electrolyte level in the bath changes, the electrolyte continuously drains, thereby eliminating excessive contamination of the electrolyte surface in the bath, for example, with dust particles. The connection of the supply and discharge electrolyte pipes is carried out by welded or flanged connection directly to the libre indirectly, for example, by means of bolted connections, along the entire end wall of the electrolysis cell. The shape and location of the inlet and outlet ports of the electrolyte supply and discharge pipes provides a parallel flow between the electrodes, which is also proved by optical and distance measurements and temperature distribution measurements. Object of the Invention A device for circulating electrolyte in electrolysis baths, made of thermo - and corrosion-resistant electrically non-conductive material, containing tubes for supplying and discharging electrolyte, located on the inner walls of the bath, characterized in that the flow of electrolyte directed parallel to The surfaces of the edelectrodes of the pipe are mounted paralyed but one another, are erected by mehda themselves and are made with pressure. located along one straight line PI along the height of the pipes on the side, opposite the surface of the joint of the pipes, the upper hole in the electrolyte outlet is filled in the form of a slit.

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