In order to rationally and economically utilize manganese oxide resources, various manganese extraction technologies have been developed, such as fire smelting method, reduction roasting acid leaching method, water smelting method, etc., and the reduction leaching method is one of the more economical methods. . At present, the two-mine one-step method is commonly used in large-scale production, that is, the method of acid leaching of manganese oxide ore and pyrite at 90 ° C for 4 to 5 hours. The above leaching process is characterized in that the dilute sulfuric acid solution containing H2O2 can be quickly leached at room temperature for 30 minutes to reach the end point, and the leaching rate of manganese is more than 90%.

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