MODELING HINDERED BATCH SETTLING PART II - A MODEL FOR COMPUTING SOLIDS PROFILE OF CALCIUM-CARBONATE SLURRY

This study suggests a hypothesis for determining and a model for compu ting suspended solid behaviour during batch settling aimed at better u nderstanding of the settling process and more accurate and convenient determination of solids profiles. The approach is built on the graphic al approach of Work and Kohler taking into account the effect of scale (i.e. initial height of suspension) on the settling of the surface of suspension. It is shown that the proposed approach includes the same information as the traditional Kynch theory of sedimentation. The prop osed model, derived from the hypothesis and a model for a batch settli ng curve. introduce a mathematical tool for determining the solids lay ers and it also eliminates the disadvantage of the Kynch, theory which only offers a graphical procedure for the determination. The applicab ility of the model was tested with calcium carbonate (CaCO3) suspensio n. The experimental study proves that the model can be successfully ut ilised in computing the behaviour of calcium carbonate during a batch settling test.