Fractal modification Study on Ultrasonic Attenuationparticle Size Model in Slurries
Effects of irregularity, rough surface and aggregation of fine particles on ultrasonic attenuation are significant. The effects should be considered while predicting particle size by ultrasonic attenuation technology. The scanning electron microscope micrographs analysis also shows that particles surface is rough and irregularity. Any slurries has its fractal structure and its special fractal scale and dimension, so, effects of irregularity, rough surface and aggregation of fine particles can be described by fractal model. The discrepancies between predictions of ultrasonic attenuation based on the assumption of smooth spherical particles and data obtained from slurries of irregular particles indicated that there were different fractal structures. The ultrasonic attenuation model was modified by fractal dimensions. The result of experimental data and analogue calculation indicated that predictions of the fractal modification of ultrasonic attenuation model show good agreement with experimental data. On the other hand, from the values of fractal obtained by inversely calculation, the degree of effects of irregularity, rough surface and aggregation of particles can be estimated. The positive value of fractal dimension indicates that the aggregation has the dominant effect on ultrasonic attenuation, otherwise, the irregularity and rough surface has the dominant effect.
Fractal Ultrasonic attenuation Particle Model
G. C. He K. Q. Huang W. Ni
Jiangxi University of Science & Technology, China Beijing University of Science & Technology, Beijing, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2468-2476
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）