Abstract: 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 applying innovative pilot-scale deep cone thickener simulation system to the study of tailings' dynamic continuous thickening experiment，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 underflow concentration.

Key words: Deep cone thickener, Mud height, Underflow concentration, Dynamic consolidation