Improved process of extracting manganese from dialozite

[0009] Embodiment 1: rhodochrosite 100 grams, the return liquid of electrolytic manganese (its composition is about sulfuric acid 36 grams / liter, manganese 14 grams / liter, ammonium sulfate 84 grams / liter, the same below) 815 milliliters, water 35 milliliters, the vitriol oil 15 milliliters, stir and react at 60°C for 8 hours, filter, add 1 gram of pyrolusite to the filtrate, the content of manganese dioxide in pyrolusite is 15%, stir and react for 20 minutes at room temperature, add ammonia water to adjust the pH value of the solution When the temperature is 5.0, add 0.08 g of ethyl disulfide, stir the reaction for 10 minutes, and filter. After testing, the ferrous ion concentration was 1ppm.

[0010] Embodiment 2: 100 grams of rhodochrosite, 815 milliliters of return solution of electrolytic manganese, 35 milliliters of water, 15 milliliters of concentrated sulfuric acid, stirred and reacted at 65 DEG C for 7 hours, added unslaked lime to adjust the pH value of the solution to 6.0, added 2 grams of pyrolusite, The content of manganese dioxide in the pyrolusite is 30%. At 60° C., stir and react for 25 minutes, add 0.09 g of ethyl disulfide, stir and react for 10 minutes, and filter. After testing, the ferrous ion concentration was 0.5ppm.

[0011] Embodiment 3: 100 grams of rhodochrosite, 800 milliliters of water, 31 milliliters of concentrated sulfuric acid, stirred and reacted at 70 DEG C for 6 hours, added sodium carbonate to adjust the pH value of the solution to 7.0, added 3 grams of pyrolusite, the content of manganese dioxide in pyrolusite The content is 45%. At 65° C., stir and react for 30 minutes, add 0.10 g of ethyl disulfide, stir and react for 10 minutes, and filter. After testing, the concentration of ferrous ions was 0.1ppm.