Abstract: ZnSO₄ solution was used as a raw material， which was obtained from zinc oxide ores roasted using (NH₄)₂SO₄ and then digested in water. The main components in solution were ZnSO₄， Fe₂(SO₄)₃， Al₂(SO₄)₃ and so on. NH₄HCO₃ was used as purifier reagent. Aiming to obtain refined ZnSO₄ solution， the ammonium jarosite method and hydrolysis method were adopted to eliminate Fe³⁺ and Al³⁺ from the solution. The influences of pH values， the reaction temperature and time on the iron removal rate were discussed， and after the removal of iron， the ammonium jarosite slags were obtained. The pH value of solution was adjusted to precipitate Al³⁺ and Al(OH)₃ was yielded out. The XRD， SEM and chemical components analysis were used to characterize the ammonium jarosite and Al(OH)₃ slags. The results showed that the ammonium jarosite particles with regular shape growes well， and the size of Al(OH)₃ slags is heterogeneous.

Key words: ZnSO₄ solution, purification, ammonium jarosite, Al(OH)₃