Method for producing electrolytic manganese from manganese carbonate ore with low manganese content and high iron content

Abstract

The invention discloses a method for producing electrolytic manganese from manganese carbonate ore with low manganese content and high iron content. According to the method, the manganese carbonate ore with low manganese content and high iron content is mixed with manganese dioxide ore, and a direct leaching method is adopted. According to the technical scheme, the manganese carbonate ore is directly acid-leached to prepare a manganese sulfate solution, then the solution is prepared into electrolyte by a series of processes of neutralization, purification and filtering, and the electrolyte can enter an electrolytic bath for electrolysis by adding additives such as selenium dioxide, ammonium sulfite and the like. The method disclosed by the invention has the characteristics that a series of problems that reduction process equipment utilizing manganese dioxide ore to produce electrolytic manganese is large in investment, complex in process and high in cost, has serious production conditions and can not meet the requirements on environmental protection and the like for a long time are solved, and a new path for producing the electrolytic manganese from the manganese dioxide ore is provided; simultaneously, a new path for developing and utilizing the manganese carbonate ore with low manganese content and high iron content is also provided, so that the wastes can become valuables and national resources are fully utilized.

Description

technical field

[0001] The present invention relates to smelting, further to metallic manganese, specifically to a method for producing electrolytic manganese by utilizing low-grade manganese carbonate ore, more specifically a method for producing electrolytic manganese by utilizing manganese-poor high-iron manganese carbonate ore. Background technique

[0002] The vast majority of electrolytic manganese enterprises in my country use manganese carbonate ore as raw material, and it takes 8-10 tons of manganese carbonate ore to produce one ton of electrolytic manganese. After decades of mining, the manganese carbonate ore with more than 20% is rare in China at present, the grade is generally 12%-15%, and the grade used in some areas has been as low as 8%-12%. According to the mining standard of the industry, such manganese carbonate ore has no mining value.

[0003] Manganese carbonate ore is directly prepared by the reaction of sulfuric acid and manganese carbonate to prepar...

Examples

Embodiment Construction

[0033] 6.5 tons of manganese-poor high-iron manganese carbonate containing 12% manganese and 18% iron, 3.5 tons of manganese dioxide ore containing 23% manganese, crushed into fine powder of 85~95 mesh, put into the compound tank and add 98% excess sulfuric acid 3 tons, then stirred and reacted for 4 to 5 hours, obtained manganese sulfate solution by leaching, and then prepared as an electrolyte through a series of processes such as neutralization, filtration, and purification, and added 1.1 to 1.3 kg of selenium dioxide as an additive, and entered the electrolytic cell for electrolysis , and finally get 1 ton of electrolytic manganese.

technical field

[0001] The present invention relates to smelting, further to metallic manganese, specifically to a method for producing electrolytic manganese by utilizing low-grade manganese carbonate ore, more specifically a method for producing electrolytic manganese by utilizing manganese-poor high-iron manganese carbonate ore. Background technique

[0002] The vast majority of electrolytic manganese enterprises in my country use manganese carbonate ore as raw material, and it takes 8-10 tons of manganese carbonate ore to produce one ton of electrolytic manganese. After decades of mining, the manganese carbonate ore with more than 20% is rare in China at present, the grade is generally 12%-15%, and the grade used in some areas has been as low as 8%-12%. According to the mining standard of the industry, such manganese carbonate ore has no mining value.

[0003] Manganese carbonate ore is directly prepared by the reaction of sulfuric acid and manganese carbonate to prepar...

Examples

Embodiment Construction

[0033] 6.5 tons of manganese-poor high-iron manganese carbonate containing 12% manganese and 18% iron, 3.5 tons of manganese dioxide ore containing 23% manganese, crushed into fine powder of 85~95 mesh, put into the compound tank and add 98% excess sulfuric acid 3 tons, then stirred and reacted for 4 to 5 hours, obtained manganese sulfate solution by leaching, and then prepared as an electrolyte through a series of processes such as neutralization, filtration, and purification, and added 1.1 to 1.3 kg of selenium dioxide as an additive, and entered the electrolytic cell for electrolysis , and finally get 1 ton of electrolytic manganese.