Method for producing manganese metal through electrolysis

Abstract

The invention relates to the technical field of manganese metal production conducted through electrolysis, in particular to a method for producing manganese metal through electrolysis. The method comprises the following steps of leaching, iron removal, heavy metal removal, purification, electrolysis, passivation, drying and peeling. When rhodochrosite is treatment through the method, the leachingrate of manganese can be increased; after impurity removal chemicals and the like are added to obtained manganese sulfate liquid for deep purification, the impurity content is low; product quality isguaranteed; an electrolysis addition agent and passivation agent adopted in the method are safe and environmentally friendly, and harm to human bodies and pollution to the environment are reduced; when the manganese metal is electrolyzed through the method, energy consumption is greatly saved, cost is lowered, and the environment is protected; and in addition, the purity of the manganese metal produced through the method reaches 99.8% or above.

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] Manganese is an indispensable additive in the smelting industry. After electrolytic manganese is processed into powder, it is the main raw material for the production of manganese tetraoxide. The original magnetic material widely used in the electronics industry is produced from manganese tetraoxide. The electronics industry, metallurgical industry and The aerospace industry requires electrolytic manganese metal. Electrolytic manganese metal is obtained from manganese ore through acid leaching to obtain manganese salt, and then sent to the electrolytic cell for electrolysis. The purity of electrolytic manganese is very high, with a manganese content of more than 99.7%. Hard and brittle, one side is bright, the other side is rough, silvery white to brown, silvery ...

AI Technical Summary

Problems solved by technology

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; Higher, but Se will precipitate into the electrolytic manganese product during the electrolysis process, which will reduce the purity of the electrolytic manganese and affect the product quality, and selenium dioxide is an inorganic poison, which greatly endangers human health and seriously pollutes the environment; 4 1. When passivating the semi-finished manganese metal products obtained by electrolysis, the main component of the passivation solution used is chromate, which is a toxic substance and will greatly damage the health of the operators.