Abstract: According to the ore-dilution problem existing in ore drawing process of Tongkeng mine, numerical simulation analysis of ore drawing with the flat hopper and ore drawing with the sloping hopper were carried out using Particle Flow Code (PFC). Taking ore recovery rate and dilution rate as the detection index, advantages and disadvantages of these two ore drawing modes were analyzed, and the numerical results were compared. The results indicate that it's feasible to adopt the sloping ore drawing in Tongkeng mine, and ore drawing with the sloping hopper is recommended.

Key words: Ore drawing with the flat hopper, Ore drawing with the sloping hopper, PFC, Dilution rate