Measurements have been made of the settling rates of uranium trioxide-water slurries in the range of 100 to 800 grams per litre at temperatures of 25° and 53°C. The applicability of several equations proposed by others to relate the rate of hindered settling to surface area, concentration and viscosity has been examined. It is shown that the data are best fitted by an empirical equation similar to one proposed by Allison and Murray for zinc, aluminum and magnesium oxide suspensions.
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