Electrolyzers for the production of manganese dioxide

Abstract

The invention discloses an electrolytic cell for producing manganese dioxide, comprising a cell body, the cell body is provided with a liquid inlet and a waste liquid overflow port, and the cell body is provided with positive and negative electrodes, wherein, The tank body consists of granite stone, anti-corrosion layer, tension layer and steel plate from the inside to the outside. The bottom of the tank body is provided with a steam heating pipe, and the waste liquid overflow port is located at the upper part of the tank body. A region for accommodating an insulating bubble layer is provided above the flow opening. The electrolytic cell for producing manganese dioxide provided by the present invention adopts a multi-layer composite structure with good acid resistance and high strength. By heating at the bottom of the cell body, an area for accommodating the thermal insulation bubble layer is arranged above, and hydrogen is used as the foaming gas. Source, forming the bubble coverage of the whole tank, making the temperature in the reaction tank rise, achieving the effects of dissolving the sediment at the bottom of the tank and reducing the pressure drop at the bottom of the tank, and at the same time reducing the corrosion of the gas equipment in the plant caused by hydrogen escape, and finally reducing voltage to find space.

Description

Technical field [0001] The invention relates to an electrolytic cell, in particular to an electrolytic cell for producing manganese dioxide. Background technique [0002] With the continuous development of the battery industry, especially the popularization of electric bicycles and powered cars, manganese dioxide for new battery cathode materials such as zinc manganese batteries, alkaline batteries, and lithium manganate batteries has developed rapidly. It is expected that with the gradual promotion of the market, lead-acid batteries will gradually withdraw, new-type electrolytic manganese dioxide for batteries will develop rapidly, and drive the development of the entire electrolytic manganese dioxide product market, and the demand for electrolytic manganese dioxide products will year by year increase. [0003] The electrolytic manganese dioxide products have always been prepared by electrolysis of manganese sulfate solution, using pyrolusite or hard manganese ore as raw material...

AI Technical Summary

Problems solved by technology

However, the use of heat preservation balls or covering heat preservation devices not only occupies the space of the tank body, but also affects the distribution of positive and negative electrodes.

In addition, the cover insulation device has a positive and negative short circuit (anode: Mn 2+ -2e - +4OH - =MnO 2 +2H 2 O, there is water vapor released, which is easy to liquefy and condense on the covering insulation device to form water droplets and drop to the positive and negative connection devices, causing a short circuit) and the danger of hydrogen explosion (cathode: 2H + +2e - =H 2 ↑Gas hydrogen is released, covering the insulation device is a relatively closed environment, if the volume concentration of hydrogen in the air is between 4.1% and 74.2%, it is very easy to explode)

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