EXPERIMENTAL INVESTIGATION INTO DYNAMICS AND STABILITY OF CONTINUOUS MSMPR AGGLOMERATIVE PRECIPITATION OF CACO3 CRYSTALS

Experiments were carried out to study the dynamic and kinetic behaviou r during the agglomerative precipitation of CaCO3 in an MSMPR crystall izer. The results demonstrate that for certain conditions steady state can be achieved earlier for such a process than for simple crystalliz ation. Bimodality of the PSD was once more confirmed. Kinetic constant s for nucleation, growth, aggregation and disruption were estimated by non-linear least squares fitted to a discretized MSMPR population bal ance model. Preliminary results indicate a dependence of both crystal aggregation and agglomerate disruption on crystal growth rate, but to reverse extents.