Method for removing manganese element in solution containing nickel, cobalt and manganese and application of method

The invention discloses a method for removing a manganese element in a solution containing nickel, cobalt and manganese and application of the method, the solution containing nickel, cobalt and manganese is adjusted to be weakly acidic, part of manganese in the solution is oxidized, then the manganese is precipitated in the form of manganous-manganic oxide, sodium silicate is adopted as a dispersing agent, further agglomeration or growth of manganous-manganic oxide particles is inhibited, and the manganese element in the solution containing nickel, cobalt and manganese is removed. And the recovery efficiency and purity of the manganese element are improved in cooperation with flotation, so that downstream utilization of a nickel-cobalt-containing solution is facilitated, and a nickel-cobalt product with higher quality is obtained. 本公开公开了去除含镍钴锰溶液中的锰元素的方法及其应用，通过调整含镍钴锰溶液呈微弱酸性，并对其中部分锰进行氧化，进而使得锰以四氧化三锰的形式沉淀出来，同时采用硅酸钠作为分散剂，抑制四氧化三锰颗粒进一步团聚或长大，配合浮选提高锰元素的回收效率和纯度，进而有利于下游对含镍钴溶液的利用，得到质量更高的镍钴产品。