2004•Journal of Jilin Institute of Chemical TechnologyRequires access
Preparation of polyaluminium silicate sulfate flocculants from bauxite sledge
Zhen Xing Chen
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Abstract
The polyaluminium silicate sulfate flocculants were prepared from bauxite sledge.The polymerization of silicate acid was studied,and the proper conditions of polymerization were slected:pH=(3.5)～4.0,concentration of SiO_2 4%.The polyauminium silicate sulfate flocculants were applied to treat simulating turbid water and filland leachates.When pH=7.0～9.0,the amount of flocculants is 0.3～2.3?mL,and n_(Al)/n_(Si)≥0.25,the removal rate of turbidity is above 90%.The treatment results of filland leachates showed that the removal rate of turbidity by the polyaluminium silicate sulfate flocculants is better than that of plyaluminium chloride flocculants.