In the non-ferrous metallurgical industry, Potassium Permanganate is added as an oxidant during the hydrometallurgical process of non-ferrous metals such as copper, zinc, cadmium, and uranium to oxidize the divalent iron dissolved in the acid solution into trivalent iron, adjust the pH value of the solution, and remove the iron by precipitation.

The reaction equation of permanganate with iron ions and manganese ions:

MnO₄₋ + 5Fe²⁺ + 8H⁺=5Fe³⁺ + Mn²⁺ + 4H₂O

2MnO₄₋ + 3Mn²⁺+2H₂0 = 5MnO₂ + 4H⁺