Experimental study on flocculating sedimentation of ultra-fine unclassified tailings

To deal with the sedimentation problem for the unclassified tailings,and determine the reasonable settlement parameters of classified tailings,by choosing tailings concentration,flocculant solution concentration and flocculant unit consumption as influence factors,the flocculation settlement experiments were carried out based on the principle of single variable and orthogonal test.The experimental data was processed by regression analysis with the software SPSS.The results showed that the optimum settlement effect was obtained with the tailings concentration of 5% when the addition of PAC was 250 g/t followed by the addition of 45 g/t APAM the main flocculant with the molecular mass of 18 million at concentration of 0.04%.The order of factors that influences the settling velocity in descending is tailings concentration,the flocculant unit consumption and flocculant solution concentration.The experimental conclusion provides a good guidance to control flocculent settlement parameters on the flocculent settlement of classified tailings in mines.