SU1691427A1 - Electrode assembly of diaphragm-less magnesium electrolyzer - Google Patents

Abstract

This invention relates to electrometallurgy of magnesium, namely to the design of an electrode assembly of a diaphragmless magnesium electrolyzer. The purpose of the invention is to reduce capital costs and increase V The level of electrolyte -gg gU b-gyvhoda current, during the operation of the cell on the surface of the anodes 1 chlorine is released, and on the surface of the cathodes 2 - magnesium drops. Chlorine bubbles carry the electrolyte along with magnesium into the upper part of the electrode assembly, where a directional flow is formed towards the collecting cell. The presence of guiding elements 3 made of a carbon-graphite material in the form of sickle plates with an angle of inclination towards the assembly cell of 30 - 60 ° C; provides for the intensification of the movement of the electrolyte into the assembly cell. This increases the current efficiency. The attachment of the elements 3 to the anodes 1 makes it possible to reduce the height of the electrolyzer, which reduces capital costs. 3 il. olita 1M Ё Os you y VJ

Description

This invention relates to electrometallurgy of magnesium, namely to the design of an electrode assembly of a diaphragmless magnesium electrolyzer.

The purpose of the invention is to reduce capital costs and increase current efficiency.

FIG. 1 shows the electrode assembly, a vertical cross section; in fig. 2 - the same, top view; Fig, 3 - electrode assembly, vertical longitudinal section.

The electrode assembly of a diaphragm-free magnesium electrolyzer contains anodes 1, cathodes 2, and guiding elements 3. The latter are made of carbon-graphite material in the form of crescent-shaped plates. Elements 3 are installed in the slots 4 of the anodes 1 at an angle of 30 - 60 ° in the direction of the team cell (not shown).

Electrode site works as follows.

The electrode assembly, installed in the bath of an electrolytic magnesium electrolytic cell, is located under the electrolyte layer.

When the electrolyzer is connected under load, chlorine is released on the anodes 1, and magnesium drops on the cathodes 2. Chlorine bubbles, rising, carry the magnesium drops into the upper part of the electrode assembly. AT

the upper layers of the electrolyte form a weld stream toward the collecting cell.

Presence of guiding elements 3

contributes to the intensification of the directional movement of the electrolyte in the assembly cell and to the reduction of the time that magnesium drops are in the interelectrode space. This is also facilitated by the elimination

closed circulation flows in interelectrode spaces. All this causes an increase in current efficiency by 3 - 5%. The fastening of the elements 3 in the slots 4 of the anodes 1 makes it possible to reduce the height of the electrolyzer and thereby reduce capital costs.

Claims (1)

Formula of the invention Electrode unit without diaphragm magnesium electrolyzer containing anodes, cathodes and guide elements placed between the anodes above the cathodes, characterized in that, in order to reduce capital costs and increase the current output, the anodes are made with grooves, the guide elements are made of carbon-graphite material in the form of sickle-shaped plates and installed in the slots of the anodes with a slope of 30 - 60 ° in the direction Magnesium yield. Ohno Electrolyte level.