Empirical correlations for the prediction of cake dewatering characteristics

The irreducible equilibrium saturation and dewatering kinetics of vacuum-dewatered filter cakes are studied. Limitations of available empirical correlations for cake dewatering characteristics are presented. The mechanisms of air displacement dewatering are delineated as no-air-flow and air-flow dewatering regimes, and new nondimensional groups combining the pertinent parameters in each regime are proposed for correlating the equilibrium saturation. On the basis of the capillary flow dynamics, a nondimensional group is formulated for the correlation of dewatering kinetics in the absence of air flow rate data. The correlations are verified with the experimental data obtained from the filtration of hematite slurries and an empirical equation based on the same data is suggested for equilibrium saturation predictions.
Minerals Engineering


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Citation Formats
C. HOSTEN and K. SASTRY, “Empirical correlations for the prediction of cake dewatering characteristics,” Minerals Engineering, pp. 111–119, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51945.