EFFECT OF ULTRASONIC TREATMENT ON THE PROPERTIES OF COAL WATER SLURRY

摘要

The effect of ultrasonic treatment on the properties of coal water slurry(CWS), such as slurryability, rheological behavior and static stability, were investigated. The ultrasonic intensity was varied from 40 w/cm~2 to 80 w/cm~2 and treatment time from 2 to 10 minutes. Ultrasound treatment promoted a distinct improvement in both rheological behavior and static stability of CWS, but at same time it caused a slight increase in the apparent viscosity of CWS. The analysis of particle size distribution indicated that ultrasonic treatment resulted in a higher proportion of fine coal which benefits to improve the rheological behavior and static stability of CWS.