4. Solids of specific gravity 3.0 suspended in water at concentrations of about 5% by volume is to be classified by Krebs hydrocyclones. The operating pressure available is 90 kPa and the volumetric flow rate of the suspension to be handled is 18 m/h. A cut size close to 12 um is required for the classification. Calculate the cyclone diameter, Dc, the number of cyclones, N, and the cyclone power required for the duty. (Hint: Calculation has to be repeated with different numbers of cyclones until a cut size close to 12 pm is achieved. Therefore, I would suggest that you solve the problem on Excel.) 4. Solids of specific gravity 3.0 suspended in water at concentrations of about 5% by volume is to be classified by Krebs hydrocyclones. The operating pressure available is 90 kPa and the volumetric flow rate of the suspension to be handled is 18 m/h. A cut size close to 12 um is required for the classification. Calculate the cyclone diameter, Dc, the number of cyclones, N, and the cyclone power required for the duty. (Hint: Calculation has to be repeated with different numbers of cyclones until a cut size close to 12 pm is achieved. Therefore, I would suggest that you solve the problem on Excel.)