The Research of the Preparation and Characterization of Selective Flocculant Suitable for Fine Hematite

This paper, a comprehensive analysis of selective flocculation am fine hematite selected based on the combination of soluble starch and the characteristics of acrylamide was prepared soluble starch - grafting of acrylamide polymer flocculant. Conditions of single-factor experiment studied the conditions on the starch - the impact of acrylamide polymerization and to the level of starch graft ratio to measure the various conditions on the polymerization to determine the optimal conditions of each are as follows: initiator using cerium nitrate Ammonium; initiator concentration 0.001moL / L; AM / soluble starch mass ratio of 2:1; reaction time of 2h; the reaction temperature is 60 °C. In terms of single-factor test, designed a four factors and three levels of the orthogonal test, the optimum conditions are: starch and monomer mass ratio of 1:2; initiator concentration of 0.001 mol / L; the reaction temperature is 65 °C; reaction time was 1.5h. Under these conditions, starch and the grafting rate of 153.24. By scanning electron microscopy and infrared spectrum we can see, the namely, the resulting polymer soluble starch and acrylamide graft copolymer. By hematite flocculation test we can see, with flocculants prepared by flocculation, its ability to better than selective flocculation.