Abstract:In order to meet the needs of underground filling and alleviate the pressure of tailings storage capacity, Datun tin mine plans to invest in the construction of vertical sand bin filling system. In order to improve the sand loading efficiency and ensure the core performance of vertical sand bin, it is necessary to analyze and study the feed parameters. In this paper, the sedimentation characteristics of tailings such as settling velocity, solid flux and treatment capacity were analyzed by carrying out tailings settlement test, and optimum feeding parameters of vertical sand bin in Datun tin mine were determined. The results showed that flocculation sedimentation was suitable for the tailings settlement of the mine. The optimal dosage of polyacrylamide (type: RT491) was 20 g/t, the optimal feed volume concentration was 9.88% (mass concentration was 25%), the flow rate was 448 m3/h, and the theoretical treatment capacity of the vertical sand bin was 134.67 t/h. The research results have important guiding significance for the design of feeding parameters of vertical sand bin in Datun tin mine, and the research method has popularization and application value for similar mines.