The preparation method of zinc sulfate

Add zinc oxide to dilute sulfuric acid solution to make a slurry, after the reaction is complete, filter, add zinc powder to replace copper, cadmium, nickel, etc., filter, heat the filtrate, add potassium permanganate, and remove impurities such as iron and manganese. Oxidized, filtered, clarified, concentrated, crystallized by cooling, centrifuged and dried. It can also be obtained by leaching roasted zinc ore powder with sulfuric acid.