ANALYSIS ON THE PARTICLE SIZE INFORMATION IN SODIUM ALUMINATE SOLUTION DURING SEEDED AGGLOMERATION

摘要

Seeded agglomeration was studied in sodium aluminate solution (Na_2O_k=140g·l~(-1), initial α_k 1.37, final α_k 1.90) at 75 ℃ . Conclusions were made from the particle size information that agglomeration takes place mainly for particles with the sizes of 0～10 μ m at first and then the larger ones. For particles with certain sizes, peaks and troughs appear alternately on the curves of the volume percentage to time. The appearance time is basically the same and moves backward when particle size is larger. The kinetic parameters can be further calculated based on the information.