Preparation method of electrolytic manganese dioxide and preparation device

Abstract

The invention discloses a preparation method of electrolytic manganese dioxide and a preparation device, and relates to the technical field of electrolytic manganese dioxide. The method sequentially comprises the following steps that (1) leachate of crude manganese sulfate is prepared, and neutralizing, impurity removing, electrolyzing, stripping and rinsing are conducted to obtain manganese dioxide fragments; and (2) the manganese dioxide fragments are introduced into a ball mill for ball milling to obtain manganese dioxide particles, in a ball milling process, the manganese dioxide particles with particle sizes not greater than a preset particle size value are screened out to obtain manganese dioxide powder, and ball milling is continuously conducted on the manganese dioxide particles with particle sizes greater than the preset particle size value. According to the method, when the particle sizes of the manganese dioxide particles are larger than the preset particle size value, the manganese dioxide particles are continuously milled, and when the particle sizes of the manganese dioxide particles are not larger than the preset particle size value, the manganese dioxide particles can be automatically screened out from the ball mill to obtain qualified manganese dioxide powder, so that idle milling of the manganese dioxide powder is reduced, milling time can be effectively shortened, and electric energy is saved.

Description

technical field [0001] The invention relates to the technical field of electrolytic manganese dioxide, in particular to a preparation method and a preparation device of electrolytic manganese dioxide. Background technique [0002] Electrolytic manganese dioxide is an excellent depolarizer for batteries. Compared with dry batteries produced by natural discharge manganese dioxide, it has better performance. Electrolytic manganese dioxide has become a very important raw material for the battery industry. Electrolytic manganese dioxide The entire technological process of manganese production can generally be divided into three parts: liquid preparation, electrolysis, and finished product treatment. Specifically, it is divided into: leaching, iron removal by oxidation, neutralization, solid-liquid separation, heavy metal removal by vulcanization, electrolysis, stripping, crushing, rinsing and stripping Acid, drying, milling, blending and metering and packaging. [0003] For exam...

AI Technical Summary

Problems solved by technology

This grinding method needs to grind almost all the manganese dioxide fragments in the ball mill into qualified powder, which requires a long grinding time and consumes more energy. The manganese dioxide powder that is first ground to participate in all subsequent The grinding process, that is, the manganese dioxide powder is ground, and the accumulation of manganese dioxide powder in the ball mill will affect the grinding efficiency of the remaining manganese dioxide fragments

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