尾矿动态浓密过程中底流浓度主要影响因素研究

深锥浓密机是尾矿高效浓密脱水的关键设备，其生产过程中的泥层高度对压密效果具有重要影响，进而影响底流浓度，而目前缺少基于动态连续浓密过程的泥层高度对底流浓度的影响研究。笔者借助自制的小型深锥浓密机模拟系统进行了全尾砂连续动态浓密试验，探究了泥层高度和固体通量分别对动态浓密过程的影响。结果表明，在动态浓密过程中，底流浓度与泥层高度呈非线性正相关关系，泥层高度一定时，底流浓度最终趋于平稳；泥层高度稳定在60 cm时，由非连续浓密转变为连续浓密，底流浓度由60.3%降至56.4%；动态浓密过程中，泥层高度一定时，底流浓度与固体通量呈线性负相关关系。因此，泥层高度和固体通量对深锥浓密机的底流浓度具有一定的影响。

Study on Main Factors of Underflow Concentration in the Dynamics Thickening Process of Tailings

Deepcone thickener is a key equipment for tailings' dewatering and thickening,and its mud height is a critical factor to the consolidation process in the production and then influences the underflow concentration. But there is lack of study on influence of mud height on underflow concentration on the basis of dynamic continuous thickening process at present. By ap-plying innovative pilot-scale deep cone thickener simulation system to the study of tailings' dynamic continuous thickening ex-periment,the paper explored the impact of mud height and solid flux respectively on the process. The results showed that in the process of dynamic continuous thickening,the underflow concentration was nonlinearly and positively related to mud height. When it got to a certain height,the concentration inclined to steady state. At the height of 60 cm steadily,the discontinuous thickening was transformed into continuous thickening,the underflow concentration decreased from 60. 3% to 56. 4%. Besides, during the process,it was found that there was negative linear correlation between solid flux and underflow concentration at a certain height. The results all above indicated that mud height and solid flux had certain influence on deep cone thickener's un-derflow concentration.