Experiment on the Influence of Features of the Broken Particle Size in a Flutter Ball Mill

doi:10.3901/JME.2018.07.205

Abstract

Abstract: Size distribution of powder has an important effect on the practical product performance and its applications. Ten kinds of grinding tests in the flutter ball mill under different operate conditions are conducted, to study the influence factors on the powder size distribution of the motion parameters of the flutter mill, such as vibration amplitude, frequency and rotation speed as well as the shapes of the grinding media. The characteristic parameters of the particle size distribution has been analyzed including median particle diameter D₅₀, width of the particle size distribution W_PSD, specific surface area S and average particle size D_aps. Combining with the result of the range-method used in the test of homogeneity, the optimum working condition to form and accumulate fine particles for flutter ball mill has been obtained, which is 4 mm of the vibration amplitude, 12 Hz of the frequency and 85% of the rotating speed with the ball media. The SEM images of the powder particles can give out the agglomerating size of the superfine particles and their agglomerating way. The limit-size of the powder observed in the images is almost consistent with the one calculated from the experimental result. Based on the results, the optimum flutter parameters and media shape has been obtained, which can conduct the practical production of the superfine particles for the flutter ball mill.

Key words: average particle size, features of the broken particle size, flutter ball mill, median particle diameter, rotation speed, SEM image, vibration amplitude and frequency

CLC Number:

TD453

LIANG Man, SUN Yi, SHAN Jihong, JIN Xiaohang. Experiment on the Influence of Features of the Broken Particle Size in a Flutter Ball Mill[J]. Journal of Mechanical Engineering, 2018, 54(7): 205-215.

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