Experimental study on the effect of vibrating filler auxiliary medium on micro powder filling process

In the spectral analysis experiments of ore composition, the ore powders should be tightly filled into the test carbon rod. To enhance the filling effect of micro powders, the two-dimensional vibrating filler method added by auxiliary medium was introduced for filling and compacting. The mechanical contact model of micro-powders was established by discrete element method, and the particle model of micro-powders was constructed and simulation by EDEM software. By considering the main parameters of vibration packing (vibration frequency and vibration time), the two-dimensional vibrating filling process of the mixture ore powders in the particle sizes of 50~150 μm was simulated by using agate ball as the auxiliary medium in the cavity volume of 1 cm³, when the vibration frequency was 60~80 Hz and the vibration time was 10~15 s; the influencing factors of vibration frequency and vibration time on the filling rate and packing density of micro-powders were analyzed and discussed; finally, the simulation was verified by vibratory packing experiment in the self-made table. The results show that the filling material is compacted in two-dimensional vibrating filler method added by auxiliary medium, and the filling quality can meet the test requirements. The validity of simulation model is verified by experiment, providing a reference for other powder fillers.