SU443105A1 - Electrolyzer to get magnesium - Google Patents

Description

The invention relates to the field of light metals metallurgy, in particular, to the development of the design of an electrolytic cell for the production of magnesium.

A known electrolyzer for producing magnesium includes a lined bath, anodes inserted from above, cathodes in the form of frames and metal plates, under the TODs of the anodes connected to the cathode frames, metal plates laid on the bottom.

The disadvantage of the known electrolyzer is that on the horizontal cathode metal plates located under the ends of the anodes on the node, the sludge periodically accumulates, as a result of which part of the cathode surfaces are periodically turned off from the process, and the voltage on the electrolyzer and energy consumption increase by 10-15 ;.

Proposed Electrolyzer

(differs from the well-known in that the plates under the ends of the anodes are located narrower from the bottom of the bath and their anodes are turned to the anodes. This arrangement of the electrolyzer eliminates sludge settling on the working surfaces of the plates and reduces the specific electric power consumption.

The drawing shows the proposed electrolyzer in the context of a vertical plane.

In the metal casing I of the electrolysis cell there is a lug bath, bath 2, closed with a left opening 3. Flat anodes 4 are inserted through the overlap into the bath, which are covered by the cathode frames 5, the cathodes 6 are led through the side walls or the bottom of the bath.

Under the ends of the anodes, there are located I vertical plates 7 spaced from each other, connected-1 to the cathode frames. The electrolyzer has one or more prefabricated cells 8 for magnesium and nozzles 9 for the suction of chlorine. In the proposed electrolyzer, the cathode plates spaced vertically under the ends of the anodes and spaced from each other are not covered with sludge, i.e. The ends of the anodes are used as working anodic surfaces to a much greater degree than in the known electrolyzer. With a constant current output, this allows a 5–10% reduction in the specific energy consumption due to a decrease in the voltage drop in the electrolyte and an increase in 4–4% by 4 4. . The performance of the electrolysis cell by increasing the current strength. Preliminary design of the electrolyzer. The electrolyzer for producing magnesium, including a lined bath, anodes inserted from above, cathodes in the form of frames, and metal plates under the ends of the anodes, connected to cathode frames, characterized in that in order to eliminate sludge settling on the working surfaces of the plates and to reduce the specific energy consumption, the plates under the ends of the anodes are located spaced apart from the bottom of the bath and with their narrow sides facing the anodes.