Production method for electrolytic manganese metal

Abstract

The invention provides a production method for electrolytic manganese metal and relates to the technical field of producing manganese metal through electrolysis. The method comprises the procedures of the preparation of an ore pulp, iron removal through neutralization, impurity removal through purification, electrolysis, passivation, stripping and cleaning. During impurity removal through purification, after impurity removal through purification is conducted once with the adoption of sodium dimethyl dithiocarbamate (SDD), impurity removal is further conducted with the adoption of a deep impurity removal agent. The deep impurity removal agent is composed of, by weight, 10%-20% of poly-ferric aluminous sulfate, 18%-20% of potassium oxalate, 10%-15% of polyacrylamide, 10%-15% of acrylamide, 8%-10% of dimethylamine, 15%-20% of barium sulfide, 7%-15% of ethylenediamine tetraacetic acid, and 3%-4% of activated carbon. The method is suitable for producing the electrolytic manganese metal with low-grade manganese ore as raw materials; manganese ore resources are used reasonably; the production cost is reduced; the adopted process has the advantage of a high metal leaching rate, and the purity of a manganese sulfate solution obtained by using the process of deep impurity removal is high; the quality of the electrolytic manganese product is ensured.

Description

【Technical field】 [0001] The invention relates to the technical field of electrolytic production of manganese metal, in particular to a production method of electrolytic manganese metal. 【Background technique】 [0002] In the production process of electrolytic manganese metal, there are mainly the following methods at present. One is to use manganese oxide ore as raw material, roast and reduce it, and then undergo acid leaching and deep purification to prepare pure manganese salt solution for electrolytic production. Obtain high-purity electrolytic manganese metal; the other is to use manganese carbonate ore as raw material, then undergo acid leaching, oxidation and iron removal and deep purification to obtain pure manganese salt solution, which is used for electrolysis to obtain high-purity electrolytic manganese metal. Using manganese-containing waste as raw material, through acid leaching, oxidation and iron removal, and deep purification to obtain pure manganese salt sol...

AI Technical Summary

Problems solved by technology

[0003] However, as the existing manganese ore resources are becoming more and more scarce and the manganese grade is getting lower and lower, the production of electrolytic manganese metal is more difficult and the cost is higher; the market competition of electrolytic manganese metal is fierce, and the profit margin is getting smaller and smaller; in the process of electrolytic manganese metal A large amount of harmful waste filter residues are produced, causing great harm and hidden dangers to the environment and groundwater pollution

The deficiencies in the existing electrolytic manganese metal production process mainly contain the following points: 1. The metal leaching rate is low, and the manganese ore recovery rate is low; 2. The impurity content in the manganese sulfate liquid obtained is high, especially iron and copper , cobalt, nickel, lead, calcium sulfate and magnesium sulfate and other impurities affect the final quality of electrolytic manganese products; 3. When passivating the semi-finished manganese metal products obtained by electrolysis, the main component of the passivation solution used is chromate , is a toxic substance that will cause great damage to the health of the operating workers

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