In order to study the sedimentation characteristics of ultra-fine tailings overflow from hydrocyclone in a coagulation environment, the sedimentation velocity of overflow ultra-fine tailings under different coagulant dosage, pulp pH and temperature conditions were analyzed experimentally in this study. The results indicate that with the increase in sedimentation time, the sedimentation velocity of the coagulant first increases, followed by a decline before becoming flat. When the ferric chloride coagulant dosage is 90 mg/L, the pH of the pulp is 9. The sedimentation velocity reaches the maximum value of 5.57 mm/s, when the temperature of the pulp is 60 °C. According to the sedimentation process of the coagula, the coagulation sedimentation model of total tailings was extended and modified. The average absolute error between the corrected settlement velocity and the actual velocity was found as 0.0034, with the root mean square error is as 0.0088, which is relatively small. The results obtained from the theoretical calculations are consistent with the experimental data. The modified and optimized coagulation sedimentation model is important in promoting the theoretical research on the coagulation and sedimentation of such ultra-fine mineral particles.

为研究水力旋流器溢流超细尾矿在混凝环境下的沉降特性，对不同混凝剂用量、矿浆pH值和温度条件下溢流超细尾矿的沉降速度进行了实验分析。结果表明，随着沉降时间的增加，混凝剂的沉降速度先增加，然后下降，然后变平。当三氯化铁混凝剂用量为90 mg/L时，纸浆的pH值为9。当纸浆温度为60℃时，沉降速度达到最大值5.57 mm/s。根据混凝物的沉降过程，对总尾矿的​​混凝沉降模型进行了扩展和修改。修正后的沉降速度与实际速度的平均绝对误差为0.0034，均方根误差为0.0088，相对较小。理论计算得到的结果与实验数据一致。改进和优化的混凝沉降模型对于推动此类超细矿物颗粒的混凝沉降理论研究具有重要意义。