Hydrocyclones Table 2 shows thedimensions of the hydrocyclones studied in this work (Bradley’s and Rietema’s designs). The filtering hydrocyclones had cylindrical section diameter (D C) of 3.10-2 m and underflow diameters (D U) of 3.10-3, 4.10-3 and 5.10 m. Three filtering cones R1, R2, R3, were made of sinter bronze for the