Method for producing electrolytic manganese metal and active manganese dioxide from anode slime produced by electrolytic manganese metal

Abstract

The invention belongs to the technical field of electrolytic production and recovery of manganese by solution electrolysis, and specifically relates to a method for producing electrolytic metal manganese and active manganese dioxide from anode slime produced by electrolytic metal manganese, comprising the following steps: A. Slurry the anode, add ammonia water to adjust the pH of the solution to 9-10, separate the solid and liquid after press filtration, wash with water to obtain the press filter block and washing water, and recycle the washing water; B. use the anode of electrolytic manganese metal after the press filter block is calcined Liquid leaching and pressure filtration are followed by solid-liquid separation to obtain manganese dioxide press filter block and manganese sulfate solution; C. manganese dioxide press filter block acid leaching and press filtration to obtain an aqueous solution of manganese dioxide press filter block and lead Washing the block with water, drying, and grinding to obtain active manganese dioxide; D. removing impurities from the manganese sulfate solution and standing still to obtain an electrolyte, electrolyzing the electrolyte, and performing subsequent treatment to obtain electrolytic manganese metal. The method realizes the recycling and reuse of resources, and improves the income at the same time; it is safe, environment-friendly, and pollution-free.

Description

technical field [0001] The invention belongs to the technical field of electrolytic production and recovery of manganese by a solution electrolysis method, and in particular relates to a method for producing electrolytic metal manganese and manganese dioxide from anode slime produced by electrolytic metal manganese. Background technique [0002] The anode slag produced in the production process of electrolytic manganese metal is also called anode slime, which contains a relatively high content of manganese dioxide, ammonium sulfate, sulfuric acid, manganese sulfate, lead and selenium. Through the investigation of the current industrial production of electrolytic manganese metal in my country, it is found that the manganese content in the anode slime produced by electrolytic manganese metal accounts for about 7-10% of the total manganese input. [0003] In the current production of electrolytic manganese metal, the anode slime is not recycled and reused, but sold to middlemen...

AI Technical Summary

Problems solved by technology

However, the amount of auxiliary materials such as concentrated sulfuric acid and oxalic acid used in this method is large, the cost is high, and the balance problem in the process of sulfuric acid pressure filtration and electrolysis cannot be solved.