Abstract:For the settlement speed is slow and time is long in total tailings filling system, there is a research on total tailings settlement characteristics. In this paper, the flocculant is used to improve settlement velocity. The test was made for four factors which is influencing the settlement of fillings, such as flocculant types, unit consumption, sand concentration and flocculant concentration. According to the experiment data, the result reveal that the effect of anionic flocculant in tailings settlement is better than cationic and nonionic flocculants. Tailings limiting settling velocity and flocculant unit consumption were nonlinear positive correlation, the desilting concentration has showed first increasing then decreasing with the increase of flocculant unit consumption. The sand concentration and settlement rate were negatively correlated when the other conditions are fixed. Generally taking account of all the factors, it is suggested that anionic flocculant unit consumption is 10 g/t, flocculant concentration is 0.1%~0.2% and sand concentration keeps at 15%.