Fine bauxite flotation concentrate precipitated slowly, which significantly limited the capacity of the concentration plant. An effective disposal method was the addition of the flocculants to enhance the sedimentation capability of the concentrate. The sedimentation behaviors of bauxite flotation concentrates were investigated at different pH value and flocculate dosage. The effects of three types of flocculants (cationic, anionic and non-ionic polyacrylamide flocculants) as well as the molecular 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 was reached when anionic polyacrylamide flocculant (molecular weight 14 million) was added; the optimal dosage was 30 g/t.

Fine bauxite flotation concentrate precipitated slowly, which significantly limited the capacity of the concentration plant. An effective disposal method was the addition of the flocculants to enhance the sedimentation capability of the concentrate. The sedimentation behaviors of bauxite flotation concentrates were investigated at different pH value and flocculate dosage. The effects of three types of flocculants (cationic, anionic and non-ionic polyacrylamide flocculants) as well as the molecular 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 was reached when anionic polyacrylamide flocculant (molecular weight 14 million) was added; the optimal dosage was 30 g/t.

刘建中（1947－），男，吉林吉林市人，石油勘探开发科学研究院高级工程师