Sliming coal slime water with flocculating agent CPSA

This paper is concerned with the synthesis of flocculant CPSA due to graft copolymerization of acrylamide monomer AM and SS of soluble starch using the composite initiator,the characterization of properties of AM and SS by SEM and FT-IR,the analysis of the properties of soluble starch from a coal preparation plant using XRF,XRD and laser particle size analyzer,and analysis the effect of the CPSA and coagulant polymeric ferric sulfate on adsorption sedimentation of slime water particles. Results suggest that the coal slime used for the experiment contains a large quantity of clay minerals composed mainly of SiO2,Al2O3,once in water,which are more likely to break down into fine particles carrying large amounts of negative charge on the surface,thus producing a stable suspension system of extremely sliming coal slime water; flocculation CPSA molecules act on suspended particles in coal slime water in a different way,giving a quicker settlement and the lower-density sediment; polymeric ferric sulfate allows a simultaneous coagulation of clay mineral and coal,producing a higher settling velocity and a relatively dense sediment; and the combined use of them provides not only a higher slime water settling velocity, but also a lower turbidity of the supernatant fluid. The study may provide a reference for slurry flocculating sedimentation in the coal preparation plants.