| Abstract: | A previously published diffusion-based mathematical model is used to simulate data from two vertical air classifiers operating on shredded municipal solid waste streams. Good agreement with the model is achieved at high values of the air/solids ratio, that is, the region where interaction between solid particles would be expected to be insignificant. At lower values of the air/solids ratio the concept of a recovery efficiency is introduced to take account of interaction effects. This efficiency appears to show the expected dependence on air/solids ratio. A design method is proposed, based on feed particle size distribution and relationships between recoveries and product qualities. |
