Research on relationship between tailing slurry concentration and ultrasonic attenuation coefficient
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摘要: 针对目前基于超声波法的尾矿浆浓度测量方法没有直接表达浓度与散射衰减系数、黏滞衰减系数的相关关系的问题,采用数值计算方法,研究了超声波在尾矿浆中的衰减特性,得到了声波衰减系数与浓度的相关关系,并通过实验数据的分析论证了数值计算的准确性。研究结果表明:浓度在10%以内时,浓度越大,声速越小;浓度在5%以内时,超声波的衰减系数与浓度近似成正比关系;当超声波频率、粒径一定,浓度在10%以内时,浓度越大,超声波的衰减系数越大。研究结果为超声波在尾矿浆浓度在线监测中的实际应用提供了依据。Abstract: In view of problem that the current tailing slurry concentration measurement method based on ultrasonic method does not directly express correlation between concentration and scattering attenuation coefficients and viscous attenuation coefficients, the attenuation characteristics of ultrasonic wave in tailing slurry were studied by numerical calculation method, and the correlation between acoustic attenuation coefficient and concentration was obtained, and the accuracy of numerical calculation is demonstrated through experimental data. The research results show that within the concentration of 10%, the greater the concentration, the lower the speed of sound; within the concentration of 5%, the attenuation coefficient of ultrasonic wave is approximately proportional to the concentration; when the ultrasonic frequency and particle size are constant, within the concentration of 10%,the greater the concentration, the greater the attenuation coefficient of the ultrasound. The research results provide a basis for the practical application of ultrasound in online monitoring of tailings slurry concentration.
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