Abstract:reduction-oxidation process (V.M. goethite process) is used in zinc hydrometallurgy to remove iron ions from oxygen pressure leaching solution of zinc sulfide concentrate, and the influence of different aeration modes and oxygen flow rate on iron removal process is explored. It is found that the mass transfer of oxygen has a significant effect on the process of iron removal by oxidation, and the effect of intensified stirring on the mass transfer of oxygen is small. However, aeration can greatly improve the dispersion of oxygen, increase the mass transfer of oxygen, and accelerate the oxidation rate of Fe_²⁺, so as to improve the iron removal efficiency. The results show that when the oxygen flow rate is more than 1 L/min, the oxygen flow rate has little effect on the iron removal; when no seed crystal is added, a large number of amorphous substances are formed in the aeration oxidation iron removal, which may be the hot metal compound (5Fe₂O₃.9H₂O), which hinders the transformation of the precipitate to goethite due to its adsorption of other ions. The research results will have a certain reference value for iron removal by reduction oxidation method (V.M. goethite process) in zinc hydrometallurgy.