METHOD FOR PRODUCING HIGH PURITY MANGANESE OXIDE FROM BYPRODUCT OF MANGANESE STEEL ALLOY ELECTRIC FURNACE AND ELECTRIC FURNACE AND HIGH PURITY MANGANESE OXIDE PRODUCED THEREBY

摘要

The present invention relates to a method for producing high purity manganese oxide (Mn_3O_4), wherein high purity manganese oxide (Mn_3O_4) may be obtained from a byproduct generated from a manganese steel alloy electric furnace containing manganese. The method comprises the steps of: (S10) removing potassium from a byproduct generated from a manganese steel alloy electric furnace; (S20) leaching manganese sulfate by using sulfuric acid (H_2SO_4) after the step (S10); (S30) removing first impurities including iron from a leach liquor of the step (S20); (S40) removing second impurities by adding sodium sulfide after the step (S30); (S50) adding sodium hydroxide after the step (S40) to precipitate the same as manganese oxide material; (S70) oxidizing the same by supplying oxygen (O_2) after the step (S50); and (S90) collecting manganese oxide from a liquid obtained through the step (S70).