Study on Some Factors Impacting Ultrasonic Attenuation in Coal Water Slurry

Coal water slurry is an important clean energy. Its parameters must be controlled effectively during the course of production. To realize on-line measurement of parameters of coal water slurry based on ultrasonic attenuation technology, in this paper, effect of some factors on ultrasonic attenuation in coal water slurry were discussed. Under normal temperature and atmospheric pressure, effect of concentration, viscosity and coal particle size on ultrasonic attenuation were studied by changing the proportion of coal powder, stirring time and the amount of stabilizer, coal particles size. Results show that the ultrasonic attenuation increases along with concentration increases. And the ultrasonic attenuation reduces along with the viscosity increases. And results show that the relationship between ultrasonic attenuation and particles size is not linear, when the particles average size is lower than a certain size, the ultrasonic attenuation reduces along with the particles size increases, when the particles average size is higher than a certain size, the ultrasonic attenuation increases along with the particles size increases.