METHOD FOR PRODUCING MANGANESE SULFATE MONOHYDRATE

The invention relates to a method for producing manganese sulfate monohydrate.According to the invention, this method comprises:* a stage of electric leaching (S2) of manganese-comprising ore at a temperature from 20°C to 40°C and under constant air purging in a diaphragm-less electrolyzer,* stages of jarosite (S3), hydrolytic (S4), sulfide (S5) and fluoride (S6) purification of the obtained solutions,* a stage of autoclave crystallization (S7) of a salt at a temperature from 160°C to 165°C and at a pressure from 0,60 MPa to 0,65 MPa.In addition, the stage of electric leaching (S2) is performed with a concentration of iron ions from 3,5 g/l to 4,5 g/l using a stainless steel mesh as a cathode with a cathode current density from 200 A/m2 to 250 A/m2. A process control at the electric leaching stage (S2) is carried out by changing a value of a redox potential of a Fe3+/Fe2+ system. The obtained salt is flushed with anhydrous methanol at a temperature from 30°C to 40°C during from 0,5 hour to 1 hour, while a ratio of a salt crystal mass and an anhydrous methanol volume is 1/2,5 kg/I.