1 research outputs found
The deflocculation of kaolin suspensions : the effect of various electrolytes
The deflocculation effect of conventional additives to kaolin suspensions is evaluated from the
results standard rheological measurements. Several widely used electrolytes (NaOH, Na2C03,
Na2Si03, SHMP = sodium hexametaphosphate, and CMC = sodium salts of carboxymethylcellulose)
have been tested. The optimal concentrations of these deffloculants, in respect to
reaching the maximum reduction of initial suspension viscosity, are found. The stability of
deflocculated kaolin suspensions against sedimentation is evaluated and different aspects of the
observed flow enhancement discussed. Inorganic electrolytes are found to be more effective in
viscosity reduction, but on the other hand, low-molecular organic CMC additives produce more
stable final suspensions.Czech Science Foundation GACR through the contract P101/12/058