Method for preparing manganous-manganic oxide from lean manganese ore

• Main Authors: PENG TIANJIAN, DONG XIONGWEN
• Format: Patent
• Language: Chinese; English
• Published: 22.07.2022
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY

The invention provides a method for preparing manganous-manganic oxide by utilizing lean manganese ore, which comprises the following steps: S1, carrying out ore grinding treatment on the lean manganese ore, adding concentrated sulfuric acid, an oxidizing agent and a neutralizing agent, and carrying out solid-liquid separation to obtain a manganese sulfate solution and leaching manganese slag; the neutralizer is one or a combination of two of carbonate and bicarbonate; s2, a vulcanizing agent is added into the manganese sulfate solution, heavy metal is removed, solid-liquid separation is conducted, purified liquid and vulcanized slag are obtained, the vulcanized slag is used for extracting nickel, cobalt, manganese and zinc elements, and a battery-grade nickel-cobalt-manganese ternary precursor is prepared; s3, an electrolytic additive is added into the purified liquid for electrolysis, electrolytic manganese metal is obtained, obtained anode liquid is not returned for liquid preparation, a manganese-ammonium