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The sedimentation behaviors of bauxite flotation concentrates were investigated at different pH values and floc-eulant dosages.The effects of three types of flocculants( cationic,anionic and non-ionic polyacrylamide flocculants)as well as the moleculax weight of anionic flocculants on the sedimentation of concentrate were studied.It is shown from the experimental results that at the pH 7.0,best sedimentation capability is reached when anionic polyacrylamide flocculant (molecular weight 14 miLlion)is added and the optimal dosage is 30 g/t.