Abstract:This article conducts experimental research on a certain mines tailings as material, by analyzing the physicochemical characteristics of the tailings in the mine, the particle size distribution characteristics of the tailings were obtained and determined that the tailings of the mine are superfine tailings with good gradation but unstable continuity. Through flocculants selection experiments, it was found that the 645S flocculants has the best effect on settling tailings; through tailings flocculation settling experiments, it was found that the optimal flocculants consumption for tailings with concentrations of 7.5%, 10%, and 12.5% were 40g/t, 40g/t, and 60g/t, when the tailings concentration was 15%, it did not meet production requirements; through multiple linear regression analysis, regression equations with good statistical significance were obtained for the concentration of tailings, unit consumption of flocculants, and average settlement velocity within 180 seconds; Based on the comprehensive experimental results, under the optimal settlement conditions, the higher the concentration of tailings, the lower the height of the clarification layer, the average settlement speed, and the concentration of compacted layer treatment, that is, the worse the settlement effect of tailings. Athough the mass concentration of the compacted layer is higher after 24 hours of natural settlement compared to the addition of flocculants, the required time for natural settlement is longer and cannot meet production needs. Therefore, adding an appropriate amount of flocculants to promote tailings settlement is a necessary measure in the mining filling process.
