Abstract: Red mud is a kind of alkali pollutant，where the strong alkali is a key factor on restricting the comprehensive utiliza- tion.Experiment and kinetics study of dealkalization with activating water leaching from red mud of Bayer process were car- ried out.The experiment results showed that the dealkalization rate could reach 71% under the conditions of water leaching time of 4，liquid to solid ratio of 9 mL/g，reaction temperature of 90 ℃，and reaction time of 60 min.The linear fitting of water leaching data was investigated with shrinking core model.The leaching kinetics results showed that the process of dealkalization with water leaching from activated red mud was controlled by the diffusion model，where the correlation coefficient and apparent activation energy were greater than 0.97 and 11.72 kJ/mol，respectively.

Key words: red mud, dealkalization, water leaching, kinetics