Purifying method for process of preparing electrolytic manganese metal electrolyte

Abstract

The invention discloses a purifying method for the process of preparing an electrolytic manganese metal electrolyte and relates to a deep purifying method for the preparing process of producing a manganese metal electrolyte through a diaphragm electrolysis method. The purifying method is characterized by comprising the following steps that (1) ammonium hydroxide is added into a neutralizing solution for the process of preparing the electrolytic manganese metal electrolyte to adjust the pH value; (2) air is injected to remove iron; (3) SDD and ammonium sulfide are added to remove heavy metals; (4) polyallylamine is added to conduct a polymerization flocculation sedimentation reaction; (5) filter pressing is conducted, an obtained filtered solution is subjected to still standing, a separated supernatant after still standing is subjected to filter pressing again, and a filter pressed solution is obtained; (6) the filter pressed solution obtained from the step (5) is subjected to pH adjusting; (7) hydrogen peroxide is added for activation; and (8) still standing and separating is conducted, and an electrolytic bath solution is obtained. According to the purifying method, an ammonia separating reaction is inhibited effectively, crystallizing of ammonium sulfate in an electrolytic bath is relieved, the pH of the electrolytic bath in the electrolyzing process is stabilized, the quality and yield of products are increased greatly, and production cost is reduced.

Description

technical field [0001] The invention discloses a purification method in the process of preparing electrolytic metal manganese electrolyte, and relates to a deep purification method in the preparation process of metal manganese electrolyte produced by diaphragm electrolysis. Background technique [0002] Since the U.S. Bureau of Mines proposed the diaphragm electrolysis method to produce manganese metal in the 1920s, the world has been using neutral MnSO 4 -(NH4) 2 SO 4 -H 2 Manganese metal is produced by membrane electrolysis of O-based catholyte, and ammonia must be adjusted and antioxidants must be added during electrolysis. There is a large amount of free NH in the electrolyte 3 The ammonia analysis reaction in the electrolysis process is serious, and the working environment of front-line workers is bad. Due to the severe crystallization of ammonium magnesium sulfate and other double salts in the electrolysis process of the electrolytic manganese industry, factors su...

AI Technical Summary

Problems solved by technology

Due to the enrichment of impurities in the liquid phase system in the production of electrolytic manganese metal, the purity of the electrolyte has a great influence on the current efficiency, and the crystallization of ammonium sulfate double salt is serious, resulting in a continuous decline in the output of electrolytic metal manganese and a continuous increase in production costs. This relationship to the life and death of a business