The sedimentation velocity of fine-grained tailings is an important factor in slurry preparation.In order to explore the flocculation sedimentation law of tailings under the multi-factor coupling conditions of flocculant type,tailings solution mass concentration,flocculant solution mass concentration and flocculant unit consumption,the orthogonal test scheme was formulated by the central composite design of Design Expert analysis software.Two kinds of flocculants were used to carry out flocculation sedimentation test on fine-grained tailings solution.The prediction models of various factors such as tailings solution mass concentration,flocculant solution mass concentration,flocculant unit consumption and fine-grained tailings sedimentation velocity were established.The sensitivity of various factors to the sedimentation velocity of fine-grained tailings was obtained,and the optimal combination of various factors was obtained.The results show that the sedimentation velocity of the fine-grained tailings solution is the fastest and the sedimentation height is larger after adding the polyacrylamide to the fine-grained tailings solution with the same concentration.With the increase of tailings solution mass concentration,the sedimentation velocity of tailings solution decreases.With the increase of flocculant solution mass concentration,the sedimentation velocity of tailings solution changes slowly.With the increase of flocculant unit consumption,the sedimentation velocity of tailings solution rises from a slow rise to a rapid rise.The influence degree of three single factors on the sedimentation velocity of fine-grained tailings from large to small is tailings solution mass concentration,flocculant unit consumption and flocculant solution mass concentration.The interaction between tailings solution mass concentration and flocculant unit consumption has a great influence on the sedimentation velocity of tailings solution.The optimal values of each factor are as follows:the tailings solution mass concentration is 10％,the flocculant solution mass concentration is 0.3％,and the flocculant unit consumption is 30 g/t.
关键词
细粒级尾砂/絮凝沉降/尾砂沉降速度/多因素耦合/配比参数优化
Key words
Fine-grained tailings/Flocculation sedimentation/Sedimentation velocity of tailings/Multi-factor coupling/Optimization of proportioning parameters
维普
万方数据