Of Pdmdaac Modified Blast Furnace Slag And Its Performance And Applied Research

PDMDAAC modified blast furnace slag(BF slag) was prepared by a method of solution adsorption. The PDMDAAC (poly dimethydiallylammonium chloride) was a kind of common flocculation, and the quenching blast furnace slag is the main solid waste of steel industry. The quenching BF slag was modified under different concentration of PDMDAAC, adsorption time and temperature. The performance of the modified BF slag was characterized by some modern testing technologies and analysis methods. The diameter distribution of modified BF slag was measured by laser particle analysis system.According to the study of PDMDAAC adsorption on the surface of BF slag particles and the decoloring study of simulation wastewater with dispersed blue S-BL, reactive blue K-GL and reactive red K-2BP, concentration, modified time, and temperature of water bath of PDMDAAC which are more likely to influence the effect of modified slag in the modified technics are mainly reviewed, and then the optimal condition of modified technics was decided. The optimal condition of modified technics is that the concentration of PDMDAAC is 3%, the time of milling is 120min and the temperature of water bath is 60℃. The quantity of BF slag in the simulation of coloring waste water, pH, temperature, and reaction time were also reviewed to the influence of disposal. The results shown that, PDMDAAC of slag enhances more disposal capacity of decentralization dye and active dye than original dregs and the disposal effect of decentralization dye is better than that of active dye. The analysis of granularity shows that granularity of BF slag did not change much after modified. The surface of the BF slag adsorbed some minus charge but adsorbed some positive charge after adsorbed PDMDAAC according to the electrophoresis. The relation of the adsorption of PDMDAAC and Zeta potential was studied. The morphology of modified BF slag did not change compared with BF slag, but the surface morphology changed after adsorb PDMDAAC, which became more coarse. There is a PDMDAAC...