Effect of Flocculation on Gypsum Filtration Efficiency
Improvement in filtration efficiency of gypsum upon flocculation is determined to be due to reduction in the blockage of filter media pores and in the filter cake resistance. An optimum in polymer dosage is explained in terms of stabilization of fines and deformability of the flocs formed. Anionic polyacrylamides were found to be more effective filter aids than cationic polymers.
KeywordsSettling Rate Amorphous Silica Phosphate Rock Filter Cake Cationic Polymer
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- 2.Grace, H.P., “Resistance and Compressibility of Filter Cakes,” Chemical Engineering Progress. 49(6), 1953, pp 303–318, 49(7), 1953, pp 367-377.Google Scholar
- 5.Ruth, B.F. “Correlating Filtration Theory with Industrial Practice,” Industrial and Engineering Chemistry. 36(6), 1986, pp 504–571.Google Scholar
- 6.Taylor, J.F., “The Effect of Polymeric Additives on the Filtration Characteristics of Gypsum,” M.S. Thesis, University of Florida, 1989.Google Scholar
- 7.Becker, P., “Phosphate and Phosphoric Acid,” Marcel Dekker, Inc., New York and Basel, 1983.Google Scholar