Method for preparing electronic grade non-selenium manganomanganic oxide from dialogite
An electronic-grade technology of manganese tetraoxide, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of undiscovered manganese tetroxide, high content of non-metallic impurities, and poor effect of non-metal, so as to facilitate large-scale The effect of low production and equipment investment and low production cost
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Embodiment 1
[0015] Example 1: Low-grade rhodochrosite ore, containing 17.22% manganese. Grinding fineness: 85-90 mesh 85-90%, according to the liquid-solid ratio of 5:1, add sulfuric acid with a concentration of 27% by weight for leaching, leaching time is 6 hours, filter to obtain manganese sulfate solution, and the manganese leaching rate is 93% . Adjust the pH of the solution to 6.5 with a concentration of 15% ammonia by weight, filter to remove iron and aluminum, add saturated ammonium sulfide solution to remove heavy metal ions, the temperature is 60°C, and the molar concentration of ammonium sulfide is 0.1M; 2% ammonium phosphate and ammonium fluoride to remove calcium and magnesium, filter the impurity precipitate, and obtain a purified manganese sulfate solution; add 1 gram of aluminum salt for every gram of silicon dioxide in the manganese sulfate solution in the purified manganese sulfate solution, and then use industrial ammonia water Adjust the pH of the solution to 6.0, add ...
Embodiment 2
[0017] Embodiment 2: low-grade rhodochrosite ore, manganese-containing 16.82%, grinding fineness: 85-90 order 85-90%, add the sulfuric acid that weight percent concentration is 27% by liquid-solid ratio 5: 1 and carry out leaching, leaching time After 6 hours, the manganese sulfate solution was obtained by filtration, and the manganese leaching rate was 93%. Adjust the pH of the solution to 6.5 with a concentration of 15% ammonia by weight, filter to remove iron and aluminum, add saturated ammonium sulfide solution to remove heavy metal ions, the temperature is 60°C, and the molar concentration of ammonium sulfide is 0.1M; 2% ammonium phosphate and ammonium fluoride to remove calcium and magnesium, filter the impurity precipitate, and obtain a purified manganese sulfate solution; add 0.8 grams of aluminum salt per gram of silicon dioxide in the manganese sulfate solution in the purified manganese sulfate solution, and then use industrial ammonia Adjust the pH of the solution t...
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