Research On The Flutter Ball Mill And Simulation Analysis Of Its Coupling Parameter

Ball mills, are widely used in the mineral powder processing as a important equipment. The motion patterns of grinding media in the traditional mills cannot head to a high grinding efficiency. A new motion patterns becomes more necessary. Laboratory flutter ball mill is coupled with vertical excitation on the basis of the original motion. This way of motion prolongs the action duration of extrusion and grinding of internal medium layer in the unit cycle. Operational parameters are selected improperly in practical production, which causes a high energy consumption. Therefore, the optimization of the key parameters is very necessary in order to improve the efficiency of the flutter ball mill. This paper revolves the movement of grinding media and operating parameters of the futter ball mill to study.First of all, the author analyzed the flow pattern of grinding media and their motion mathematical relationships, which was based on the basic theory of particle breakage and the dynamics model of the flutter ball mill. By analyzing the cataracting movement of media in the ball mill with a vertical vibration, the author concluded the relationship of the coupling parameters of the mill to the velocity and impact angle of the medium, and explored the distribution of the boundary curve of function area in the cylinder. Three operating parameters (rotation rate, excitation frequency, excitation amplitude) were chosen as test factor, and simulation experiment was conducted by means of the uniform orthogonal method. The results showed that the shape of grinding media flow was conchoidal or irregular in condition of high amplitude and low frequency, This status was conducive to the material’s impact crushing. On the contrary condition, the compactness of grinding media was a circulation state from relaxation to pressure. However, the liquidity between media get stronger, and the grinding efficiency get better.The crushing energy, useless power consumption and grinding efficiency were used to analyze the simulation results, and the data was handled with the DMRT. When the rotational speed rate was 80%, the amplitude was 8 mm and vibration frequency was 14 Hz, the useless power consumption was minimum, the liquidity between media and the grinding efficiency got better. Therefore, the flutter ball mill has a relatively higher grinding efficiency in the above condition. The work provides theoretical basis and a useful reference for the practice production of the flutter ball mill.