It is not clear whether your interest is in the solid density of the crystal or the density of the bulk material entering the centrifuge. The former is definitive and dependent on the nature of the basic material, whereas the bulk density of a particulate mass is variable according to the state of packing of the constituent particles. A crystaline slurry fed into a centrifuge will rapidly attain a compacted structure that expresses excess fluid. Residual saturation will percolate as accelerated drainage, with little change in the solids volume. The discharge of centrifuged cake causes significant voids to be made between agglomerated lumps of the cohesive bulk, but the density then depends on subsequent handling conditions.

I suspect that the answer to your query is that the slurry density depends on the degree of concentration, but it will not stay in this condition during the centrifuge loading cycle because the initial layer will bed down as entered. I would expect the important design feature to be the porosity of the bed under conditions of enhanced gravity, as the fluid contained in subsequent layers of additions have to penetrate an increasing bed depth.

Perhaps one with more direct experience with the operation of different types of centrifuges could provide a more detailed expanation. ■